Stud elongation value measuring tool

Abstract

The utility model relates to a stud elongation value measuring tool. The stud elongation value measuring tool comprises a dial indicator, a gauge stand, a fastening screw and a length measuring rod; the length measuring rod is installed in the to-be-measured stud with the hollow hole, the lower end of the length measuring rod is in threaded connection with the bottom end of the hollow hole of the to-be-measured stud with the hollow hole, the gauge stand is in threaded connection with the top of the to-be-measured stud with the hollow hole, the dial indicator is installed on the gauge stand through a fastening screw, and a contact of the dial indicator penetrates through the gauge stand to make contact with the top face of the length measuring rod. According to the invention, extension value measurement of all studs with measuring holes can be realized, the installation mode of the studs is not limited to horizontal or vertical installation, and the method can be generally used for measurement after the studs are installed in any direction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stud assembly in mechanical equipment installation, and particularly relates to a stud elongation value measuring tool, which is suitable for large studs with hollow holes and elongation value requirements, and particularly suitable for studs installed in blind holes. BACKGROUND

[0002] Studs as fasteners play an important role in the manufacturing, installation and operation of various mechanical equipment. Applying a certain pre-tightening force to the stud can not only prevent gaps between the connected parts or relative slipping after being subjected to load, but also increase the reliability and tightness of the connection. The pre-tightening force of the stud fastener requires higher and higher precision, and the elongation value of the stud is usually used as a standard for checking the pre-tightening force of the high-precision stud. It is very important to accurately measure the elongation value of the stud. In the conventional pre-tightening process of large studs, the elongation value is measured by setting up dial gauges at both ends of the stud and calculating the elongation value of the stud by subtracting the readings of the two displacement dial gauges. However, for large studs installed in blind holes, one end of the stud is located in the blind hole, so the displacement of the stud cannot be monitored by using a dial gauge, and therefore the elongation value of the stud installed in the blind hole cannot be measured. CONTENT OF THE UTILITY MODEL

[0003] To solve or partially solve the problems in the related art, the present application provides a stud elongation value measuring tool, which can measure the elongation value of all studs with measuring holes and is not limited to the horizontal or vertical installation of the stud, and can be used for measuring the stud after being installed in any direction.

[0004] The present application provides a stud elongation value measuring tool, which comprises a dial gauge 1, a gauge seat 2, a fastening screw 3 and a length measuring rod 4. The length measuring rod 4 is installed inside a stud 5 with a hollow hole to be measured, the lower end of the length measuring rod 4 is threadedly connected to the bottom end of the hollow hole of the stud 5 with a hollow hole to be measured, the gauge seat 2 is threadedly connected to the top of the stud 5 with a hollow hole to be measured, the dial gauge 1 is installed on the gauge seat 2 through the fastening screw 3, and the contact of the dial gauge 1 penetrates through the gauge seat 2 and contacts the top surface of the length measuring rod 4.

[0005] Optionally, in some schemes, the gauge seat 2 is provided with an axial through hole for installing the dial gauge 1 and a radial threaded hole for connecting the fastening screw 3, the fastening screw 3 penetrates through the radial threaded hole to fix the dial gauge 1, and the lower part of the gauge seat 2 is a hollow joint with external threads for connecting the stud 5 with a hollow hole to be measured.

[0006] Optionally, in some schemes, the length measuring rod 4 comprises a first section 404, a middle section 403 and a last section 402. The first section 404 has an inner thread on the upper part and an outer thread on the lower part which can be matched with the hollow hole of the bolt 5 to be measured. The middle section 403 has an inner thread on the upper end and an outer thread on the lower end. The last section 402 has an inner thread on the lower part. The lower end of the first section 404 is threadedly connected with the bottom end of the hollow hole of the bolt 5 to be measured. The middle section 403 is threadedly connected on the top of the first section 404. The last section 402 is threadedly connected on the top of the middle section 403. The contact of the dial gauge 1 passes through the base 2 and contacts the top surface of the last section 402.

[0007] Optionally, in some schemes, the last section 402 of the length measuring rod 4 is sleeved with an adjustable positioning ring 401.

[0008] The technical scheme provided by the present application can have the following beneficial effects:

[0009] The present application can ensure that the length measuring rod will not follow and deviate during the stretching process by adjusting the adjustable positioning ring, so as to affect the accuracy of the measurement. The base is fixed on the top of the bolt measurement hole, and the dial gauge is finally fixed on the base by the adjustable screw and adjusted to zero, so that the formal measurement can be carried out. For measurement holes of different sizes, only the length of the length measuring rod and the diameter of the adjustable positioning ring need to be adjusted, which saves time and reduces the operation complexity.

[0010] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0011] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the different views of the drawings.

[0012] Figure 1 is a measurement structure schematic diagram of the bolt elongation value measurement tool shown in the embodiments of the present application;

[0013] Figure 2 is a structure schematic diagram of the length measuring rod shown in the embodiments of the present application;

[0014] Figure 3 is a structure schematic diagram of the base and the fastening screw shown in the embodiments of the present application.

[0015] Reference signs:

[0016] 1 - dial gauge, 2 - dial seat, 3 - fastening screw, 4 - length measuring rod, 401 - adjustable positioning ring, 402 - length measuring rod end section, 403 - length measuring rod middle section, 404 - length measuring rod head section, 5 - to-be-measured stud with hollow hole. DETAILED DESCRIPTION

[0017] Embodiments of the present application will be described in more detail with reference to the drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application will be thorough and complete, and to convey the full scope of the present application to those skilled in the art.

[0018] It should be understood that although the terms "first", "second", "third", etc. can be used in this application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0019] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0020] Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0021] In view of the above problems, the embodiment of the present application provides a stud elongation value measuring tool, which can measure the elongation value of all studs with measuring holes, and is not limited to the horizontal or vertical installation of the stud, and can be used for measuring the installed stud in any direction.

[0022] The technical solutions of the embodiments of the application are described in detail below with reference to the drawings.

[0023] Referring to Figure 1 , the stud elongation value measuring tool comprises a dial gauge 1, a gauge seat 2, a fastening screw 3, and a length measuring rod 4. The length measuring rod 4 is installed inside a hollow hole of a stud 5 to be measured, and the lower end of the length measuring rod 4 is threadedly connected to the bottom end of the hollow hole of the stud 5 to be measured. The gauge seat 2 is threadedly connected to the top of the stud 5 to be measured. The dial gauge 1 is installed on the gauge seat 2 through the fastening screw 3, and the contact of the dial gauge 1 penetrates through the gauge seat 2 and contacts the top surface of the length measuring rod 4.

[0024] In operation, the device is installed at the end of the stud 5 to be measured with a hollow hole. The length measuring rod 4 with a proper length is selected according to the length of the stud 5 to be measured with a hollow hole, and is installed in the hollow hole of the stud 5 to be measured with a hollow hole. The gauge seat 2 is installed in the screw hole at the end of the stud 5 to be measured with a hollow hole. The dial gauge 1 is installed in the gauge seat 2, and the contact of the dial gauge 1 is in contact with the end of the length measuring rod 4, so that the range of the dial gauge 1 meets the measurement requirements. After the adjustment is completed, the fastening screw 3 is tightened to fix the dial gauge 1, and the pointer of the dial gauge 1 is adjusted to zero. During the stretching measurement of the stud 5 to be measured with a hollow hole, the gauge seat 2 installed at the end of the stud 5 to be measured with a hollow hole moves with the stretching end of the stud, and the change of the dial gauge 1 is reflected, so that the dynamic tracking of the elongation value of the stud can be realized. The final elongation value of the stud can be read through the display of the dial gauge 1 after the stud stretching tool is unloaded.

[0025] In some embodiments, referring to Figure 3 , the gauge seat 2 is provided with an axial through hole for installing the dial gauge 1 and a radial threaded hole for connecting the fastening screw 3. The fastening screw 3 penetrates through the radial threaded hole to fix the dial gauge 1. The lower part of the gauge seat 2 is a hollow joint with external threads for connecting the stud 5 to be measured with a hollow hole.

[0026] In operation, the gauge seat 2 and the dial gauge 1 can be conveniently installed and removed. Different sizes of measuring holes only need to replace the gauge seat 2.

[0027] In some embodiments, referring to Figure 2The length measuring rod 4 comprises a first section 404, a middle section 403 and a last section 402. The upper part of the first section 404 is connected with an inner thread, and the lower part is connected with an outer thread which can be matched with the hollow hole of the bolt 5 to be measured. The upper and lower ends of the middle section 403 are respectively provided with an inner thread and an outer thread connection port. The lower part of the last section 402 is connected with an inner thread. The lower end of the first section 404 is threadedly connected with the bottom end of the hollow hole of the bolt 5 to be measured. The middle section 403 is threadedly connected with the top of the first section 404. The last section 402 is threadedly connected with the top of the middle section 403. The contact of the dial gauge 1 penetrates through the dial seat 2 and contacts with the top surface of the last section 402.

[0028] During operation, according to the length of the bolt 5 to be measured, the first section 404, the middle section 403 and the last section 402 with different lengths can be combined, or the middle section 403 with multiple sections can be combined with the first section 404 and the last section 402.

[0029] In some embodiments, the last section 402 of the length measuring rod is provided with an adjustable positioning ring 401.

[0030] During operation, the adjustable positioning ring 401 ensures that the length measuring rod 4 is located in the hollow hole of the bolt 5 to be measured with a certain gap and is not easy to shake, and is not affected by the stretching of the bolt 5 to be measured.

[0031] The bolt elongation measuring tool can measure the elongation of all bolts with hollow holes, and is not limited to the horizontal or vertical installation of the bolt. It can be used for the measurement of the bolt installed in any direction.

[0032] The bolt elongation measuring tool can measure the elongation of all bolts with hollow holes, and is not limited to the horizontal or vertical installation of the bolt. It can be used for the measurement of the bolt installed in any direction.

[0033] The bolt elongation measuring tool can measure the elongation of all bolts with hollow holes, and is not limited to the horizontal or vertical installation of the bolt. It can be used for the measurement of the bolt installed in any direction.

[0034] Finally, it should be noted that the terms "first" and "second", and the like, are used herein only to distinguish one identification entity from another, and do not require or imply these entities to be present in any particular relationship or order. Also, the terms "comprising", "including", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0035] The units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e. can be located in one place, or can be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0036] The embodiments of the present application have been described above, the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles, practical application or improvement of the technology in the market of the embodiments, or to enable other ordinary skilled in the art to understand the embodiments disclosed herein.

Claims

1. A stud elongation value measuring tool characterized by: The stud elongation measuring tool comprises a dial indicator (1), a base (2), a fastening screw (3), and a length measuring rod (4); the length measuring rod (4) is installed inside a hollow hole of a measured stud (5), the lower end of the length measuring rod (4) is threadedly connected with the bottom end of the hollow hole of the measured stud (5), the base (2) is threadedly connected with the top of the measured stud (5), the dial indicator (1) is installed on the base (2) through the fastening screw (3), and the contact of the dial indicator (1) is in contact with the top surface of the length measuring rod (4) through the base (2).

2. The stud elongation value measuring tool of claim 1, wherein: The base (2) is provided with an axial through hole for installing the dial indicator (1) and a radial threaded hole for connecting the fastening screw (3), the fastening screw (3) is used for fixing the dial indicator (1) through the radial threaded hole, and the lower part of the base (2) is a hollow joint with external threads for connecting with the measured stud (5) with a hollow hole.

3. The stud elongation value measuring tool according to claim 1 or 2, characterized in that: The length measuring rod (4) comprises a first section (404), a middle section (403), and a last section (402), the upper part of the first section (404) is connected with internal threads, the lower part is connected with external threads for matching the measured stud (5) with a hollow hole, the upper and lower ends of the middle section (403) are respectively provided with an internal threaded connection port and an external threaded connection port, the lower part of the last section (402) is connected with internal threads, the lower end of the first section (404) is threadedly connected with the bottom end of the hollow hole of the measured stud (5), the middle section (403) is threadedly connected with the top of the first section (404), the last section (402) is threadedly connected with the top of the middle section (403), and the contact of the dial indicator (1) is in contact with the top surface of the last section (402) through the base (2).

4. The stud elongation measuring tool of claim 3, wherein: The adjustable positioning ring (401) is sleeved on the last section (402) of the length measuring rod.

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