Marshall test piece outer groove measuring device and measuring method

Abstract

The invention discloses a Marshall test piece outer groove measuring device and a measuring method, the Marshall test piece outer groove measuring device comprises a main scale, a vernier scale, outer measuring claws and fixing screws, the vernier scale is slidably sleeved on the main scale and is limited through the fixing screws on the vernier scale, the two outer measuring claws are arranged on the same side of the main scale and the vernier scale, the main scale is provided with scales, and the two outer measuring claws are arranged on the same side of the vernier scale. Each outer measuring claw is of an L-shaped structure, one end of each outer measuring claw is connected with the main scale and the vernier scale, the other ends of the outer measuring claws are opposite, and when the other ends of the outer measuring claws make contact with each other, the scale on the main scale is displayed to be zero; when the distance between the two recesses is measured, the two outer measuring claws respectively extend into the two recesses and are in contact with the bottoms of the recesses, at the moment, the distance between the two recesses is directly read through the scales, the operation is convenient, and repeated calculation is not needed; the main scale, the vernier scale and the outer measuring claw are of an integrated structure and do not need to be connected again, so that the measuring precision is ensured; and the electronic display can directly display readings, so that personnel can conveniently obtain the detected size.

Description

Technical Field

[0001] This invention relates to the field of measurement technology, and in particular to a measuring device and method for measuring the external groove of a Marshall specimen. Background Technology

[0002] Marshall specimens are common objects in construction. When operating on Marshall specimens, it is often necessary to measure their dimensions in advance to determine whether they meet the standards. Currently, when measuring Marshall specimens with indentations on opposite sides, since the external measuring jaws of the vernier caliper are in a vertical position, in order to facilitate the measurement of the distance between the two indentations, a fixed-size pad is glued to the opposite side of the external measuring jaws. Then, the two pads are inserted into the bottom of the two indentations respectively to obtain the distance between the pads and the two indentations. Then, based on the size of the pads, the final distance between the two indentations is obtained. However, this measurement method requires frequent calculations, is cumbersome, and the adhesive has a certain thickness during the pad bonding process, which is difficult to control and can easily cause measurement errors. Summary of the Invention

[0003] The technical problem to be solved by this invention is that existing measurement methods require frequent calculations, are cumbersome, and the adhesive thickness is difficult to control, which can easily lead to measurement errors.

[0004] To solve the above-mentioned technical problems, the present invention provides a technical solution: a Marshall specimen external groove measuring device, comprising a main scale, a vernier scale, external measuring jaws, and a fixing screw. The vernier scale is slidably mounted on the main scale and is limited by the fixing screw on the vernier scale. Two external measuring jaws are arranged on the same side of the main scale and the vernier scale. The main scale is provided with a scale. The external measuring jaws are L-shaped. One end of the two external measuring jaws is connected to the main scale and the vernier scale respectively and is perpendicular to them. When the other ends of the external measuring jaws are opposite each other and in contact with each other, the scale on the main scale shows zero.

[0005] Furthermore, the main scale and vernier scale are integrated with the external measuring jaws.

[0006] Furthermore, the vernier scale is equipped with an electronic display.

[0007] To solve the above-mentioned technical problems, the present invention provides a technical solution: a method for measuring the external groove of a Marshall specimen, the steps of which are: when measuring the distance between two recesses of a Marshall specimen, firstly, the two external measuring jaws are separated by moving the vernier scale, the end of the external measuring jaw on the main scale is inserted into one recess of the Marshall specimen, and the other external measuring jaw is inserted into the other recess of the Marshall specimen by moving the vernier scale. When the ends of both external measuring jaws are in contact with the bottom of the recess, the distance between the two recesses is directly read from the electronic display.

[0008] The beneficial effects of this invention are as follows:

[0009] This application improves upon existing vernier calipers by removing the inner measuring jaws and changing the shape and scale of the outer measuring jaws. When measuring the distance between two recesses, the two outer measuring jaws extend into the two recesses respectively and contact the bottom of the recesses. At this time, the distance between the two recesses can be read directly through the scale, which is convenient to operate and does not require multiple calculations. The main scale and vernier scale are integrated with the outer measuring jaws, eliminating the need for reconnection and ensuring measurement accuracy. The electronic display can directly show the readings, making it easy for personnel to obtain the measured dimensions.

[0010] To make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only five of the drawings in this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of this application;

[0013] Figure 2 This is a schematic diagram of the structure when the vernier scale moves according to this application.

[0014] Figure 3 This is a structural schematic diagram of one dimension of the present application.

[0015] Figure 4 This is a schematic diagram of the structure during the measurement process of this application.

[0016] Figure 5 This is a photograph of the actual object used in this application.

[0017] In the figure, 1-main scale, 2-vernier scale, 3-external measuring jaws, 4-fixing screw, 5-scale, 6-electronic display; A-Marshall specimen, B-dent. Detailed Implementation

[0018] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the invention. It should be understood that the accompanying drawings and embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the invention.

[0019] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0020] The names of the messages or information exchanged between the multiple devices in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0021] Example 1

[0022] like Figure 1-5 As shown, a Marshall specimen external groove measuring device includes a main scale 1, a vernier scale 2, external measuring jaws 3, and a fixing screw 4. The vernier scale 2 is slidably mounted on the main scale 1 and is limited by the fixing screw 4 on the vernier scale 2. The two external measuring jaws 3 are located on the same side of the main scale 1 and the vernier scale 2. The main scale 1 is provided with a scale 5. The external measuring jaws 3 have an L-shaped structure. One end of the two external measuring jaws 3 is connected to the main scale 1 and the vernier scale 2 respectively and is perpendicular to them. When the other ends of the external measuring jaws 3 are opposite each other and in contact with each other, the scale 5 on the main scale 1 shows zero. When the vernier scale 2 moves on the main scale 1, it drives the external measuring jaws 3 on the vernier scale 2 to move together. When measuring the distance between two recesses B, the two external measuring jaws 3 extend into the two recesses B respectively and contact the bottom of the recesses B. At this time, the distance between the two recesses B can be read directly through the scale 5. The operation is convenient and does not require multiple calculations.

[0023] The main scale 1 and vernier scale 2 are integrated with the external measuring jaw 3, eliminating the need for adhesive pads during use and ensuring measurement accuracy.

[0024] Meanwhile, the outer measuring jaw 3 can be made to match the size of the recess B, so that the outer measuring jaw 3 can be inserted into the recess B, thereby limiting the outer measuring jaw 3 by the recess B, reducing shaking during measurement, and improving accuracy. One of the dimensions is: the main scale range is 0-250mm, the width of the main scale is 24mm, the width of the outer measuring jaw is 10mm, the length of the other side of the outer measuring jaw is 25mm, and the length from the outer edge of the outer measuring jaw to the main scale is 60mm. Dimensions not marked are based on a 0-250mm digital caliper.

[0025] Example 2

[0026] like Figure 1-3 As shown, this embodiment is obtained by adding technical features such as an electronic display 6 on the basis of embodiment one. The remaining technical features are the same as those in embodiment one, and the similarities will not be repeated here. The difference between this embodiment and embodiment one is that an electronic display 6 is provided on the vernier scale 2.

[0027] In this embodiment, the electronic display 6 is the same as the electronic display 6 in existing electronic vernier calipers, and will not be described again in this application. The electronic display 6 can directly display the reading, which makes it convenient for personnel to obtain the measured dimensions.

[0028] In use, since this application is an improvement on the existing vernier caliper, the inner measuring jaw is removed and the shape and scale 5 of the outer measuring jaw 3 are changed, while other structures remain unchanged, especially the connection method between the vernier scale 2 and the main scale 1; when measuring the distance between two recesses B, the two outer measuring jaws 3 are first separated by moving the vernier scale 2, and the end of the outer measuring jaw 3 on the main scale 1 is inserted into one recess B on the Marshall specimen A. The other outer measuring jaw 3 is then inserted into the other recess B on the Marshall specimen A by moving the vernier scale 2. When the ends of both outer measuring jaws 3 are in contact with the bottom of the recess B, the distance between the two recesses B is directly read from the electronic display 6.

[0029] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A Marshall specimen outer groove measuring device, comprising a main ruler, a vernier, an outer measuring claw and a fixing screw, the vernier is sleeved on the main ruler and is limited by the fixing screw on the vernier, two outer measuring claws are arranged on the same side of the main ruler and the vernier, and the main ruler is provided with a scale, characterized in that: The outer measuring claws are in L-shaped structure, one end of the two outer measuring claws is connected with the main ruler and the vernier ruler respectively and is perpendicular, the other end of the outer measuring claws is opposite and when the two outer measuring claws contact with each other, the scale on the main ruler shows zero.

2. The Marshall test specimen outer groove measuring device of claim 1, wherein: The main ruler and the vernier ruler are in integral structure with the outer measuring claws.

3. The Marshall test specimen outer groove measuring device of claim 2, wherein: The vernier ruler is provided with an electronic display.

4. The measuring method of the Marshall specimen outer groove measuring device according to the above claims 1-3, the steps are: when measuring the distance between two depressions of the Marshall specimen, first, the two outer measuring claws are separated by moving the vernier ruler, the outer measuring claw end of the main ruler is inserted into one depression on the Marshall specimen, the other outer measuring claw is inserted into the other depression on the Marshall specimen by moving the vernier ruler, when the two outer measuring claw ends contact with the bottom of the depressions, the distance between the two depressions is directly read from the electronic display.

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