Multifunctional vernier caliper for measuring Marshall test piece mold

Abstract

The utility model discloses a multifunctional vernier caliper for measuring a Marshall test piece mold, which comprises a main scale, a fixed clamping jaw fixedly arranged at one end of the main scale and a movable clamping jaw slidably arranged on the main scale, and a fixed clamping jaw inner diameter measuring surface and a fixed clamping jaw outer diameter measuring surface are respectively arranged on the front side and the rear side of the fixed clamping jaw. The front side and the rear side of the movable clamping jaw are provided with a movable clamping jaw inner diameter measuring face and a movable clamping jaw outer diameter measuring face respectively, the fixed clamping jaw is provided with a first distance sensor in a telescopic mode, the first distance sensor faces the movable clamping jaw and is connected with a digital display module, and the width of the fixed clamping jaw is equal to that of the movable clamping jaw. According to the utility model, the first distance sensor used for distance measurement is arranged to be of a movable structure, so that when inner diameter data and outer diameter data are measured, only the first distance sensor needs to be pushed to two limit positions relative to the fixed clamping jaw, and the data can be directly displayed in the digital display module without being calculated and processed by a calculation module.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring devices, in particular to a multifunctional vernier caliper used for measuring a Marshall test piece mold. Background Art

[0002] Asphalt mixture needs to undergo the Marshall test. The full name of the Marshall test is "Asphalt mixture Marshall stability and immersion Marshall test". It is a test to determine the best oil-stone ratio of asphalt mixture. The instruments and equipment required for the Marshall test include asphalt mixture Marshall tester, constant temperature water tank, etc. The Marshall specimen mold in the asphalt mixture Marshall tester is in direct contact with the asphalt mixture. The Marshall specimen mold has a certain wall thickness, and its inner and outer diameters need to be measured. The use of traditional vernier calipers for measurement has certain limitations, and is inconvenient to operate and read.

[0003] In order to improve the convenience of measurement, various digital display vernier calipers have appeared in the prior art, such as an infrared ranging vernier caliper disclosed in the utility model patent with authorization announcement number CN 205505883 U, which includes a main scale and a vernier mounted on the main scale, the main scale includes a scale body engraved with scales and measuring claws arranged at one end of the scale body, the measuring claws include an inner measuring claw arranged at the top of the scale body and an outer measuring claw arranged at the bottom of the scale body, and the vernier includes an upper right claw cooperating with the inner measuring claw and a lower right claw cooperating with the outer measuring claw.

[0004] Compared with the traditional digital caliper, the technical solution of the above utility model patent has the advantages and positive effects of applying the principle of infrared distance measurement to the vernier caliper by changing the structure of the traditional digital caliper, thus solving the problems of complex operation and easy reading errors of the traditional digital caliper. However, there are still the following shortcomings: the infrared transmitter is set on the side relative to the measuring claw, and the infrared light emitted by the infrared transmitter touches the measuring claw and returns to the infrared receiver. Since the measuring surfaces of the inner measuring claw and the outer measuring claw are not uniform, the display screen cannot directly display the real inner diameter data and outer diameter data, and needs to be calculated by the PLC to display the real inner diameter data and outer diameter data respectively.

[0005] It should be particularly noted that the above technical information is only intended to deepen the understanding of the overall background technology of the present utility model, and should not be regarded as admitting or implying in any form that the above technical information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0006] In view of the deficiencies in the above-mentioned background technology, the utility model proposes a multifunctional vernier caliper for measuring a Marshall specimen mold, which solves the technical problem that the existing digital display vernier caliper cannot directly display the real inner diameter data and the outer diameter data.

[0007] The technical solution of this application is:

[0008] A multifunctional vernier caliper for measuring a Marshall specimen mold comprises a main scale, a fixed jaw fixedly arranged at one end of the main scale, and a movable jaw slidably arranged on the main scale, wherein the fixed jaw is provided with a fixed jaw inner diameter measuring surface and a fixed jaw outer diameter measuring surface on the front and rear sides respectively, and the movable jaw is provided with a movable jaw inner diameter measuring surface and a movable jaw outer diameter measuring surface on the front and rear sides respectively, a first distance sensor is telescopically arranged on the fixed jaw and is directed toward the movable jaw and is connected to a digital display module, and the width of the fixed jaw is equal to the width of the movable jaw.

[0009] This technical solution sets the first distance sensor used for spacing measurement as a movable structure. When measuring the inner diameter data and the outer diameter data, it is only necessary to push the first distance sensor to the two extreme positions relative to the fixed jaws. Since the width of the fixed jaws is equal to the width of the movable jaws, the data results measured by the first distance sensor at the two extreme positions are the actual inner diameter data and the actual outer diameter data, which can be directly displayed in the digital display module without the need for calculation and processing by the calculation module. At the same time, the fixed jaws and the movable jaws in this technical solution are both located on the same side of the main scale, which changes the disadvantage of arranging the inner diameter measuring jaws and the outer diameter measuring jaws on both sides of the main scale. The inner diameter data and the outer diameter data can be measured separately by a first distance sensor, making the measurement of the inner diameter and the outer diameter more convenient and improving the convenience of measuring the Marshall specimen mold.

[0010] Preferably, the fixed claw is provided with a first through hole connecting the inner diameter measuring surface of the fixed claw and the outer diameter measuring surface of the fixed claw, and a first sliding sleeve is interlaced and matched with the first through hole, and the first distance sensor is located in the first sliding sleeve; when the first sliding sleeve is located at the left extreme position, the measuring end face of the first distance sensor is flush with the inner diameter measuring surface of the fixed claw; when the first sliding sleeve is located at the right extreme position, the measuring end face of the first distance sensor is flush with the outer diameter measuring surface of the fixed claw.

[0011] Preferably, a first marble is disposed on the inner wall of the first through hole, and a first left limit position groove and a first right limit position groove adapted to the first marble are disposed on the first sliding sleeve.

[0012] Preferably, a second distance sensor is telescopically provided on the movable claw, facing the fixed claw and connected to the digital display module.

[0013] Preferably, a second through hole connecting the inner diameter measuring surface of the movable claw and the outer diameter measuring surface of the movable claw is provided on the movable claw, and a second sliding sleeve is interlaced and cooperated with the second through hole, and the second distance sensor is located in the second sliding sleeve; when the second sliding sleeve is located at the left extreme position, the measuring end face of the second distance sensor is flush with the outer diameter measuring surface of the movable claw; when the second sliding sleeve is located at the right extreme position, the measuring end face of the second distance sensor is flush with the inner diameter measuring surface of the movable claw.

[0014] Preferably, a second marble is arranged on the inner wall of the second through hole, and a second left limit position groove and a second right limit position groove adapted to the second marble are arranged on the second sliding sleeve.

[0015] Preferably, the second through hole and the first through hole are staggered in height direction.

[0016] Preferably, the axis of the first through hole, the axis of the second through hole, and the axis of the main scale are all located in the same plane and are parallel to each other.

[0017] Preferably, the thickness of the fixed jaw is equal to the thickness of the movable jaw, and the fixed jaw and the movable jaw are arranged opposite to each other along the axial direction of the main scale.

[0018] Preferably, a length scale is provided in the length direction of the main ruler, the movable claw is slidably provided on the main ruler via a third sliding sleeve, and a third marble is provided on the inner wall of the third sliding sleeve and is press-fitted with the outer wall of the main ruler.

[0019] Compared with the prior art, the technical solution provided by the utility model sets the first distance sensor used for spacing measurement as a movable structure. When measuring the inner diameter data and the outer diameter data, it is only necessary to push the first distance sensor to the two extreme positions relative to the fixed claw. Since the width of the fixed claw is equal to the width of the movable claw, the data results measured by the first distance sensor at the two extreme positions are the actual inner diameter data and the actual outer diameter data, which can be directly displayed in the digital display module without the need for calculation processing through the calculation module. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0023] Figure 3 for Figure 1 The enlarged view of point B in the middle;

[0024] Figure 4 for Figure 1 Enlarged view of point C in the middle;

[0025] Description of reference numerals:

[0026] Main ruler 1;

[0027] Fixed claw 2, fixed claw inner diameter measuring surface 21, fixed claw outer diameter measuring surface 22, first through hole 23, first sliding sleeve 24, first marble 25, first left limit position groove 26, first right limit position groove 27;

[0028] Active claw 3, active claw inner diameter measuring surface 31, active claw outer diameter measuring surface 32, second through hole 33, second sliding sleeve 34, second marble 35, second left limit position groove 36, second right limit position groove 37, third sliding sleeve 38, third marble 39;

[0029] A first distance sensor 41, a second distance sensor 42;

[0030] Digital display module 5. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the core concept of the utility model and the following embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] The present application provides these embodiments to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0033] It should be noted that, in the description of this application, unless otherwise specified, the meaning of "several" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", "axial", "radial" and the like indicate positions or positional relationships only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0034] In addition, the words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0035] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0036] All terms used in this application have the same meaning as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0037] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the corresponding technologies, methods, and equipment should be considered part of the specification.

[0038] A multifunctional vernier caliper for measuring Marshall specimen molds, such as Figure 1As shown, it includes a main scale 1, a fixed jaw 2 fixedly arranged at one end of the main scale 1, and a movable jaw 3 slidably arranged on the main scale 1, that is, the fixed jaw 2 cannot be adjusted relative to the main scale 1, and the movable jaw 3 can slide along the axial direction of the main scale 1, thereby changing the distance from the fixed jaw 2, and the measured Marshall specimen mold is located between the fixed jaw 2 and the movable jaw 3, and the distance between the fixed jaw 2 and the movable jaw 3 is the inner diameter data or outer diameter data of the Marshall specimen mold.

[0039] The front and rear sides of the fixed jaw 2 are respectively provided with a fixed jaw inner diameter measuring surface 21 and a fixed jaw outer diameter measuring surface 22, and the front and rear sides of the movable jaw 3 are respectively provided with a movable jaw inner diameter measuring surface 31 and a movable jaw outer diameter measuring surface 32. When measuring the inner diameter of the Marshall specimen mold, the fixed jaw inner diameter measuring surface 21 and the movable jaw inner diameter measuring surface 31 are respectively braced on the inner wall of the Marshall specimen mold; when measuring the outer diameter of the Marshall specimen mold, the fixed jaw outer diameter measuring surface 22 and the movable jaw outer diameter measuring surface 32 are respectively clamped on the outer wall of the Marshall specimen mold.

[0040] The fixed jaw 2 is telescopically provided with a first distance sensor 41 facing the movable jaw 3 and connected to the digital display module 5, and the width of the fixed jaw 2 is equal to the width of the movable jaw 3. The digital display module 5 is the same as the prior art, and can be any suitable display screen, which can be installed on the main ruler 1 or on the fixed jaw 2, and will not be described in detail here.

[0041] The technical solution sets the first distance sensor 41 used for spacing measurement as a movable structure. When measuring the inner diameter data and the outer diameter data, it is only necessary to push the first distance sensor 41 to the two extreme positions relative to the fixed claw 2. Since the width of the fixed claw 2 is equal to the width of the movable claw 3, the data results measured by the first distance sensor 41 at the two extreme positions are the actual inner diameter data and the actual outer diameter data, which can be directly displayed in the digital display module 5 without the need for calculation processing by the calculation module.

[0042] At the same time, the fixed jaw 2 and the movable jaw 3 in the present technical solution are both located on the same side of the main scale 1, which changes the disadvantage of arranging the inner diameter measuring jaw and the outer diameter measuring jaw on both sides of the main scale 1. The inner diameter data and the outer diameter data can be measured respectively through a first distance sensor 41, making the measurement of the inner diameter and the outer diameter more convenient and improving the convenience of measuring the Marshall specimen mold.

[0043] On the basis of the above embodiment, as a preferred implementation of the multifunctional vernier caliper for measuring the Marshall specimen mold, as follows Figure 2As shown, the fixed claw 2 is provided with a first through hole 23 connecting the fixed claw inner diameter measuring surface 21 and the fixed claw outer diameter measuring surface 22, and a first sliding sleeve 24 is interlaced and matched with the first through hole 23, and the first distance sensor 41 is located in the first sliding sleeve 24.

[0044] When the first sliding sleeve 24 is located at the left limit position, the measuring end face of the first distance sensor 41 is flush with the inner diameter measuring face 21 of the fixed jaw, and is used to measure the inner diameter data of the Marshall specimen mold. When the first sliding sleeve 24 is located at the right limit position, the measuring end face of the first distance sensor 41 is flush with the outer diameter measuring face 22 of the fixed jaw, and is used to measure the outer diameter data of the Marshall specimen mold.

[0045] On the basis of the above embodiment, as a preferred implementation of the multifunctional vernier caliper for measuring the Marshall specimen mold, as follows Figure 2 As shown, a first marble 25 is disposed on the inner wall of the first through hole 23 , and a first left limit position groove 26 and a first right limit position groove 27 adapted to the first marble 25 are disposed on the first sliding sleeve 24 .

[0046] That is, when the first marble 25 is assembled with the first left extreme position groove 26, the first sliding sleeve 24 is located at the left extreme position, and when the first marble 25 is assembled with the first right extreme position groove 27, the first sliding sleeve 24 is located at the right extreme position, so that the position adjustment of the first distance sensor 41 is more convenient and stable and reliable.

[0047] On the basis of the above embodiment, as a preferred implementation of the multifunctional vernier caliper for measuring the Marshall specimen mold, as follows Figure 3 As shown, a second distance sensor 42 is telescopically provided on the movable claw 3 and is directed toward the fixed claw 2 and connected to the digital display module 5 .

[0048] The second distance sensor 42 is used in conjunction with the first distance sensor 41 to measure the outer diameter and inner diameter of the Marshall specimen mold from two directions respectively, and two data are displayed on the digital display module 5. The two data are verified with each other. When the difference between the two values ​​is within the allowable error range, the measurement personnel reads any value or reads the middle value as the measurement result. When the difference between the two values ​​exceeds the allowable error range, the measurement personnel re-measures to make the measurement result more accurate.

[0049] On the basis of the above embodiment, as a preferred implementation of the multifunctional vernier caliper for measuring the Marshall specimen mold, as follows Figure 3As shown, the movable claw 3 is provided with a second through hole 33 connecting the movable claw inner diameter measuring surface 31 and the movable claw outer diameter measuring surface 32, and a second sliding sleeve 34 is interlaced and matched with the second through hole 33, and the second distance sensor 42 is located in the second sliding sleeve 34.

[0050] When the second sliding sleeve 34 is located at the left limit position, the measuring end face of the second distance sensor 4 is flush with the outer diameter measuring face 32 of the movable clamping jaw, and is used to measure the outer diameter data of the Marshall specimen mold. When the second sliding sleeve 24 is located at the right limit position, the measuring end face of the second distance sensor 4 is flush with the inner diameter measuring face 31 of the movable clamping jaw, and is used to measure the inner diameter data of the Marshall specimen mold.

[0051] On the basis of the above embodiment, as a preferred implementation of the multifunctional vernier caliper for measuring the Marshall specimen mold, as follows Figure 3 As shown, a second marble 35 is disposed on the inner wall of the second through hole 33 , and a second left limit position groove 36 and a second right limit position groove 37 adapted to the second marble 35 are disposed on the second sliding sleeve 34 .

[0052] That is, when the second marble 35 is assembled with the second left limit position groove 36, the second sliding sleeve 34 is located at the left limit position, and when the second marble 35 is assembled with the second right limit position groove 37, the second sliding sleeve 34 is located at the right limit position, so that the position adjustment of the first distance sensor 41 is more convenient and stable and reliable.

[0053] Preferably, the second through hole 33 and the first through hole 23 are staggered in the height direction. Since the fixed jaw 2 is immovable relative to the main scale 1, when the outer diameter and the inner diameter of the Marshall specimen mold are measured from two directions respectively, when the difference between the two data displayed on the digital display module 5 far exceeds the allowable error range, or when the difference between the two data after multiple measurements still exceeds the allowable error range, it can be determined that the movable jaw 3 is loose relative to the main scale 1 and a rotational displacement has occurred, and repairs or accessories can be replaced in time.

[0054] Preferably, the axis of the first through hole 23, the axis of the second through hole 33, and the axis of the main scale 1 are all located in the same plane and are parallel to each other, which further ensures the measurement accuracy.

[0055] Preferably, the thickness of the fixed jaw 2 is equal to the thickness of the movable jaw 3 , and the fixed jaw 2 and the movable jaw 3 are arranged opposite to each other along the axial direction of the main ruler 1 .

[0056] Preferably, if Figure 4As shown, a length scale 11 is provided in the length direction of the main scale 1, and the movable claw 3 is slidably provided on the main scale 1 through a third sliding sleeve 38. A third marble 39 is provided on the inner wall of the third sliding sleeve 38 and is press-fitted with the outer wall of the main scale 1, thereby realizing convenient positioning and sliding of the movable claw 3 relative to the main scale 1.

[0057] The first distance sensor 41 and the second distance sensor 42 may be infrared distance measuring sensors, laser distance measuring sensors, or other types of distance measuring sensors. Such components and their working principles are prior art and will not be described in detail in this application.

[0058] The parts not described in detail in the present invention are all conventional technical means known to those skilled in the art.

[0059] The above content shows and describes the basic principle, main features and beneficial effects of the utility model. The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A multifunctional vernier caliper for measuring a Marshall specimen mold, comprising a main scale (1), a fixed jaw (2) fixedly arranged at one end of the main scale (1), and a movable jaw (3) slidably arranged on the main scale (1), characterized in that: The fixed claw (2) is provided with a fixed claw inner diameter measuring surface (21) and a fixed claw outer diameter measuring surface (22) on its front and rear sides, respectively; the movable claw (3) is provided with a movable claw inner diameter measuring surface (31) and a movable claw outer diameter measuring surface (32) on its front and rear sides, respectively; a first distance sensor (41) is telescopically provided on the fixed claw (2) and is directed toward the movable claw (3) and connected to the digital display module (5); the width of the fixed claw (2) is equal to the width of the movable claw (3).

2. The multifunctional vernier caliper for measuring Marshall specimen mold according to claim 1, characterized in that: The fixed claw (2) is provided with a first through hole (23) communicating with the fixed claw inner diameter measuring surface (21) and the fixed claw outer diameter measuring surface (22); a first sliding sleeve (24) is provided in cooperation with the first through hole (23); the first distance sensor (41) is located in the first sliding sleeve (24); when the first sliding sleeve (24) is located at the left limit position, the measuring end surface of the first distance sensor (41) is flush with the fixed claw inner diameter measuring surface (21); when the first sliding sleeve (24) is located at the right limit position, the measuring end surface of the first distance sensor (41) is flush with the fixed claw outer diameter measuring surface (22).

3. The multifunctional vernier caliper for measuring Marshall specimen mold according to claim 2, characterized in that: A first marble (25) is arranged on the inner wall of the first through hole (23), and a first left limit position groove (26) and a first right limit position groove (27) adapted to the first marble (25) are arranged on the first sliding sleeve (24).

4. The multifunctional vernier caliper for measuring a Marshall specimen mold according to any one of claims 2 to 3, characterized in that: A second distance sensor (42) is telescopically disposed on the movable claw (3), facing the fixed claw (2) and connected to the digital display module (5).

5. The multifunctional vernier caliper for measuring Marshall specimen mold according to claim 4, characterized in that: The movable claw (3) is provided with a second through hole (33) communicating with the movable claw inner diameter measuring surface (31) and the movable claw outer diameter measuring surface (32); a second sliding sleeve (34) is provided in cooperation with the second through hole (33); the second distance sensor (42) is located in the second sliding sleeve (34); when the second sliding sleeve (34) is located at the left limit position, the measuring end surface of the second distance sensor (42) is flush with the movable claw outer diameter measuring surface (32); when the second sliding sleeve (34) is located at the right limit position, the measuring end surface of the second distance sensor (42) is flush with the movable claw inner diameter measuring surface (31).

6. The multifunctional vernier caliper for measuring Marshall specimen mold according to claim 5, characterized in that: A second marble (35) is provided on the inner wall of the second through hole (33), and a second left limit position groove (36) and a second right limit position groove (37) adapted to the second marble (35) are provided on the second sliding sleeve (34).

7. The multifunctional vernier caliper for measuring Marshall specimen mold according to claim 5 or 6, characterized in that: The second through hole (33) and the first through hole (23) are arranged staggered in the height direction.

8. The multifunctional vernier caliper for measuring Marshall specimen mold according to claim 7, characterized in that: The axis of the first through hole (23), the axis of the second through hole (33), and the axis of the main scale (1) are all located in the same plane and are parallel to each other.

9. The multifunctional vernier caliper for measuring a Marshall specimen mold according to claim 8, characterized in that: The thickness of the fixed clamping claw (2) is equal to the thickness of the movable clamping claw (3), and the fixed clamping claw (2) and the movable clamping claw (3) are arranged opposite to each other along the axial direction of the main scale (1).

10. The multifunctional vernier caliper for measuring Marshall specimen mold according to claim 8 or 9, characterized in that: The main ruler (1) is provided with a length scale (11) in the length direction thereof; the movable claw (3) is slidably arranged on the main ruler (1) via a third sliding sleeve (38); and a third marble (39) is provided on the inner wall of the third sliding sleeve (38) and is press-fitted with the outer wall of the main ruler (1).

Images