CN212931216U - Vernier caliper for measuring Marshall test piece - Google Patents
Vernier caliper for measuring Marshall test piece Download PDFInfo
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- CN212931216U CN212931216U CN202022270045.4U CN202022270045U CN212931216U CN 212931216 U CN212931216 U CN 212931216U CN 202022270045 U CN202022270045 U CN 202022270045U CN 212931216 U CN212931216 U CN 212931216U
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- marshall test
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Abstract
The utility model relates to a slide caliper for measuring marshall test piece, including blade, main scale, interior measuring jaw, outer measuring jaw and depth gauge, on two outer measuring jaws respectively detachably be equipped with the measuring jaw, the inner and the cutting ferrule outer wall of every measuring jaw be connected perpendicularly, the cutting ferrule has the through-hole that is used for passing interior measuring jaw that link up the upper and lower surface, but through-hole inner wall one side is fixed with the flexure strip of the outer measuring jaw of chucking. The utility model discloses respectively increase a measuring tape on two outer measuring claws of current slide caliper, the numerical value that measures out through slide caliper like this subtracts the effective measurement length sum of two measuring tapes, is exactly marshall test piece height measurement value, can conveniently obtain the height of marshall test piece, measures the accuracy, is difficult for makeing mistakes, provides measurement efficiency and precision altogether greatly.
Description
Technical Field
The utility model relates to a measuring instrument is a slide caliper for measuring marshall test piece particularly.
Background
The design method specified in the current technical Specification for constructing asphalt road surfaces for highways (JTG F40-2004) in China is the Marshall design method. The standard Marshall test piece plays an important role in the design of the asphalt pavement and the quality control in the construction process.
After the test piece is compacted and molded, the thickness of the Marshall test piece which is not demolded is measured to determine whether the thickness of the Marshall test piece meets the requirement. If the requirements are not met, the use amount of the asphalt mixture is required to be adjusted to adjust the thickness of the Marshall test piece until the requirements of the specification are met.
The height of the small Marshall test die is 87mm, and the height of the standard Marshall test piece is 63.5 +/-1.3 mm; the height of the large Marshall test model is 115mm, and the height of the standard large Marshall test piece is 95.3 +/-2.5 mm. The just-formed Marshall test piece exists in a test die in the form of a core, the upper surface and the lower surface of the Marshall test piece are both within the upper cross section and the lower cross section of the test die, the thickness of the Marshall test piece cannot be directly measured by a vernier caliper, the thickness of the Marshall test piece is usually calculated by the height h1 of the test die, the depth h2 of an upper compaction surface and the depth h3 of a lower compaction surface, the compaction height h is calculated by h = h1-h2-h3, the measured values of h2 and h3 are not fixed every time, and the compaction height h is troublesome to calculate and easy to make mistakes.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a slide caliper for measuring marshall test piece can conveniently measure marshall test piece height and can not cause destruction to current slide caliper structure.
For solving the above technical problem, the utility model discloses a technical scheme is: a vernier caliper for measuring a Marshall test piece comprises a caliper body, a main ruler, inner measuring claws, outer measuring claws and depth gauges, wherein the two outer measuring claws are respectively and detachably provided with measuring rulers, the inner end of each measuring ruler is vertically connected with the outer wall of a clamping sleeve, the clamping sleeve is provided with a through hole which penetrates through the upper surface and the lower surface and is used for penetrating through the inner measuring claws, and an elastic sheet capable of clamping the outer measuring claws is fixed on one side of the inner wall of the through hole.
Further, the measuring tape comprises a fixing portion and a bolt, the rear end of the fixing portion is fixedly connected with the outer wall of the clamping sleeve, a screw hole is formed in the front end of the fixing portion, and the bolt is installed in the screw hole.
Furthermore, the other side of the inner wall of the through hole is provided with an anti-skid rubber pad.
Further, the bolt head is provided with a rubber pad.
Furthermore, the elastic sheet is a U-shaped steel sheet, one end of the elastic sheet is fixed with one side of the inner wall of the through hole, and the other end of the elastic sheet is a movable end.
Further, the front end of the movable end extends to the outer side of the bottom of the through hole.
Compared with the prior art, the method has the advantages that the measuring rulers are added on the two outer measuring claws of the existing vernier caliper respectively, so that the sum of the effective measuring lengths of the two measuring rulers is subtracted from the value measured by the vernier caliper to obtain the height measuring value of the Marshall test piece. Through the cutting ferrule with the fixed through-hole that makes outer measurement claw insert the cutting ferrule of measuring rule and outer measurement claw in, the flexure strip compresses tightly the side of outer measurement claw, uses the utility model provides a slide caliper can conveniently obtain the height of marshall test piece, measures accurately, is difficult for makeing mistakes, provides measurement efficiency and precision altogether greatly.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention in any way.
Fig. 1 is a schematic structural view of the vernier caliper of the present invention.
Fig. 2 is a schematic structural view of the external measuring jaw of the present invention when being connected with the card sleeve.
Fig. 3 is a top view of fig. 2.
In the figure, 1-ruler body, 2-main ruler, 3-inner measuring claw, 4-outer measuring claw, 5-depth ruler, 6-measuring ruler, 7-cutting sleeve, 8-through hole, 9-elastic sheet, 61-fixing part and 62-bolt.
Detailed Description
In order to make the present invention better understood by those skilled in the art, the present invention will be further clearly and completely described below with reference to the accompanying drawings and embodiments. In addition, the features of the embodiments and examples in the present application may be combined with each other without conflict.
The utility model relates to a vernier caliper for measuring marshall test piece that typical embodiment provided, including blade 1, main scale 2, interior measuring jaw 3, outer measuring jaw 4 and depth gauge 5, two outer measuring jaws 4 go up respectively detachably and are equipped with measuring tape 6, and the inner and the cutting ferrule 7 outer wall of every measuring tape 6 are connected perpendicularly, cutting ferrule 7 has the through-hole 8 that is used for passing interior measuring jaw of lining up upper and lower surface, but 8 inner wall one sides of through-hole are fixed with the outer flexure strip 9 of measuring jaw 4 of chucking.
According to the above embodiment, a measuring ruler is added to each of the two outer measuring claws of the existing vernier caliper, so that the sum of the effective measuring lengths of the two measuring rulers is subtracted from the value measured by the vernier caliper to obtain the height measurement value of the marshall test piece. For the same type of Marshall test piece, the sum of the effective measurement lengths of the measuring tapes on the two sides is a fixed value. By using the vernier caliper provided by the embodiment, the height of a Marshall test piece can be conveniently obtained, the measurement is accurate, errors are not easy to occur, and the measurement efficiency and precision are greatly improved.
Because the measuring tape 6 is installed on the vernier caliper body after, the damage to the structure of the existing vernier caliper is required to be reduced as much as possible, the measuring tape 6 and the outer measuring claw 4 are fixed through the clamping sleeve 7 in the embodiment, the shape of the through hole 8 is similar to that of the maximum cross section of the outer measuring claw 4, and a gap is formed between the through hole 8 and the outer measuring claw 4. During installation, the outer measuring claw 4 is inserted into the through hole 8 of the clamping sleeve 7, and the elastic sheet 9 presses the side surface of the outer measuring claw 4 to prevent the clamping sleeve 7 from being separated from the outer measuring claw 4. When the measuring tool is disassembled, the elastic sheet 9 is reversely pressed to be separated from the outer measuring claw, and the cutting sleeve 7 and the measuring ruler 6 are taken down.
In a preferred embodiment, the measuring tape 6 comprises a fixing portion 61 and a bolt 62, wherein the rear end of the fixing portion 61 is fixedly connected with the outer wall of the ferrule 7, the front end of the fixing portion 61 is provided with a screw hole, and the bolt 62 is installed in the screw hole. Through the rotation bolt, can conveniently adjust the effective length of measuring tape to required fixed value.
In another preferred embodiment, the other side of the inner wall of the through hole 8 is provided with an anti-slip rubber pad, so that the elastic sheet 9 and the anti-slip rubber pad clamp the outer measuring claw 4 at two sides of the outer measuring claw 4 respectively under the combined action, and the cutting sleeve 7 is prevented from being separated from the outer measuring claw 4 in the working process.
In order to avoid the bolt from damaging the test piece and improve the stable contact between the bolt and the test piece, the bolt head is provided with a rubber pad.
In a relatively specific embodiment, the elastic piece 9 is a U-shaped steel piece, one end of the elastic piece 9 is fixed to one side of the inner wall of the through hole, and the other end is a movable end. On this basis, the front end of expansion end extends to the 8 bottom outsides in through-hole for the staff can contact the front end of expansion end, pulls the expansion end through the staff, makes cutting ferrule 7 install and dismantle easily.
The scope of the invention is not limited to the above embodiments, and various modifications and changes may be made by those skilled in the art, and any modifications, improvements and equivalents made within the spirit and principle of the invention are intended to be included within the scope of the invention.
Claims (6)
1. The utility model provides a slide caliper for measuring marshall test piece, includes blade, main scale, interior measuring jaw, outer measuring jaw and depth gauge, its characterized in that: the two outer measuring claws are respectively and detachably provided with measuring rulers, the inner end of each measuring ruler is vertically connected with the outer wall of the cutting sleeve, the cutting sleeve is provided with a through hole which penetrates through the upper surface and the lower surface and is used for penetrating through the inner measuring claw, and one side of the inner wall of the through hole is fixedly provided with an elastic sheet which can clamp the outer measuring claw.
2. A vernier caliper for measuring a marshall test piece according to claim 1, wherein: the measuring ruler comprises a fixing part and a bolt, the rear end of the fixing part is fixedly connected with the outer wall of the clamping sleeve, a screw hole is formed in the front end of the fixing part, and the bolt is installed in the screw hole.
3. Vernier caliper for measuring a marshall test piece according to claim 1 or 2, wherein: and an anti-skid rubber pad is arranged on the other side of the inner wall of the through hole.
4. A vernier caliper for measuring a marshall test piece according to claim 2, wherein: the bolt head is provided with a rubber pad.
5. A vernier caliper for measuring Marshall test pieces as claimed in claim 4, wherein: the elastic sheet is a U-shaped steel sheet, one end of the elastic sheet is fixed with one side of the inner wall of the through hole, and the other end of the elastic sheet is a movable end.
6. The vernier caliper for measuring a Marshall specimen as claimed in claim 5, wherein the front end of the movable end extends to the outside of the bottom of the through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022270045.4U CN212931216U (en) | 2020-10-13 | 2020-10-13 | Vernier caliper for measuring Marshall test piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022270045.4U CN212931216U (en) | 2020-10-13 | 2020-10-13 | Vernier caliper for measuring Marshall test piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212931216U true CN212931216U (en) | 2021-04-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022270045.4U Active CN212931216U (en) | 2020-10-13 | 2020-10-13 | Vernier caliper for measuring Marshall test piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212931216U (en) |
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2020
- 2020-10-13 CN CN202022270045.4U patent/CN212931216U/en active Active
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