Novel Marshall stability tester

Abstract

The utility model discloses a novel Marshall stability tester, which relates to the field of road test detection and comprises a tester body and a lifting platform arranged at the top of the tester body, a positioning component is fixedly mounted at the top of the lifting platform, a lower clamp is fixedly mounted at the top of the positioning component, and a lower clamp is fixedly mounted at the bottom of the lower clamp. An upper clamp is movably mounted at the top of the lower clamp, and contact clamping blocks are movably mounted in the lower clamp and the upper clamp. The rotating shaft I connected with the turntable is driven to rotate by rotating the crank mounted on the outer side of the turntable on the right side of the mounting seat, and the rotating shaft I and the rotating shaft II are driven to rotate oppositely by the transmission of the transmission gears meshed with the left sides of the rotating shaft I and the rotating shaft II and drive the movable frame on the outer sides to rotate upwards by the rotating shaft I and the rotating shaft II; the rotating rods on the inner side of the movable frame abut against the front side and the rear side of the test piece, the deviated test piece is arranged between the lower clamp and the upper clamp in the middle, errors are reduced, and test influences are reduced.

Description

Technical Field

[0001] This utility model relates to the field of road testing and inspection, specifically to a novel Marshall stability measuring instrument. Background Technology

[0002] Asphalt mixtures are composite materials, mainly composed of asphalt, coarse aggregate, fine aggregate, and mineral powder, with some also including polymers and wood cellulose. These materials, in varying quantities and qualities, form different structures and possess different mechanical properties. The Marshall test apparatus for asphalt mixtures is primarily used to determine the stability and resistance to plastic deformation of asphalt mixtures, measuring stability and flow rate. It is suitable for asphalt mixture stability testing and provides a basis for asphalt mixture composition design and quality control during asphalt pavement construction.

[0003] Existing novel Marshall stability testers, such as the authorized announcement number CN217586677U which discloses an asphalt mixture Marshall tester, use a distance adjustment component to adjust the distance between the sample end face and the upper pressure head end face, and an adjustment component to adjust the distance between the sample end face and the upper pressure head end face. This can replace the manual adjustment method by the worker, reduce the error caused by manual adjustment, and help reduce the impact on the test. However, its fixing component is installed on the outside of the clamp, which can easily obstruct the clamp and make it inconvenient to place the specimen. In addition, it requires independent adjustment of the front and back sides through the scale, which is not simple and is troublesome to operate. Utility Model Content

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A novel Marshall stability tester includes a tester body and a lifting platform disposed on the top of the tester body. A positioning component is fixedly installed on the top of the lifting platform, a lower clamp is fixedly installed on the top of the positioning component, and an upper clamp is movably installed on the top of the lower clamp. Contact clamping blocks are movably installed inside the lower and upper clamps. The positioning component includes a mounting base, and a mounting hole is opened inside the mounting base. A rotating shaft one and a rotating shaft two are movably installed inside the mounting hole. Movable frames are fixedly installed on the outer sides of both rotating shaft one and rotating shaft two. A transmission gear is fixedly installed on the left side of rotating shaft one and rotating shaft two. A rotating rod is movably connected to the inner side of the movable frame. A turntable is fixedly installed on the right side of rotating shaft one.

[0006] A further improvement of this utility model is that: the inner sides of the lower clamp and the upper clamp are respectively provided with a slot 1 and a slot 2; the left and right sides of the lower clamp and the upper clamp are respectively provided with a fixing hole 1 and a fixing hole 2; the contact clamping block includes a clamping block and a side fixing plate fixedly connected to the outside of the clamping block; the clamping block and the side fixing plate are respectively movably clamped into the inside of the slot 1 and the slot 2; and the inside of the fixing hole 1 and the fixing hole 2 are respectively movably installed with a hand-tightening bolt located inside the side fixing plate.

[0007] A further improvement of this utility model is that the mounting holes are located inside the mounting base and are arranged symmetrically front and back.

[0008] A further improvement of this utility model is that the transmission gears on the right side of the first and second rotating shafts are identically arranged and mesh with each other.

[0009] A further improvement of this utility model is that a rubber sleeve is fixed to the outside of the rotating rod.

[0010] A further improvement of this utility model is that a crank handle is movably sleeved on the outer side of the turntable.

[0011] A further improvement of this utility model is that: the left and right sides of the card block are provided with alignment grooves, which are respectively adapted to card slot one and card slot two.

[0012] A further improvement of this utility model is that the hand-tightening bolt penetrates the side fixing plate and is threadedly connected to the inside of fixing hole one and fixing hole two.

[0013] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0014] 1. This utility model provides a novel Marshall stability tester. By rotating a crank mounted on the outside of the turntable on the right side of the mounting base, the first rotating shaft connected to the turntable is rotated. Through the transmission gear meshing on the left side of the first and second rotating shafts, the first and second rotating shafts rotate in opposite directions. The first and second rotating shafts drive the movable frame on their outer side to rotate upward. Thus, the rotating rod on the inner side of the movable frame abuts against the front and rear sides of the specimen, centering the offset specimen between the lower and upper clamps, reducing errors and minimizing the impact on the test.

[0015] 2. This utility model provides a novel Marshall stability tester. When the clamping block is damaged after use, the hand-tightening bolts located inside the fixing holes one and two are rotated along the sides of the lower and upper clamps. The hand-tightening bolts are disengaged from the through-holes in the side fixing plate. Then, the clamping block is pulled out along the clamping slots one and two to replace it, thus eliminating the need to replace the entire lower or upper clamping block and reducing maintenance and replacement costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the novel Marshall stability tester of this utility model;

[0017] Figure 2 This is a schematic diagram of the positioning component of this utility model;

[0018] Figure 3 This is a schematic diagram of the transmission gear of this utility model;

[0019] Figure 4 This is a schematic diagram of the contact clamping block of this utility model;

[0020] Figure 5 This is a cross-sectional structural diagram of the lower clamp and upper clamp of this utility model.

[0021] In the diagram: 1. Measuring instrument body; 2. Lifting platform; 3. Positioning assembly; 31. Mounting base; 32. Mounting hole; 33. Rotating shaft one; 34. Rotating shaft two; 35. Movable frame; 36. Transmission gear; 37. Rotating rod; 38. Turntable; 4. Lower clamp; 41. Slot one; 42. Fixing hole one; 5. Upper clamp; 51. Slot two; 52. Fixing hole two; 6. Contact clamp; 61. Clamp; 62. Side fixing plate; 63. Alignment groove; 64. Hand-tightening bolt. Detailed Implementation

[0022] The utility model is described in further detail below:

[0023] like Figures 1 to 5 As shown, this utility model provides a novel Marshall stability tester, including a tester body 1 and a lifting platform 2 disposed on the top of the tester body 1. A positioning component 3 is fixedly installed on the top of the lifting platform 2, a lower clamp 4 is fixedly installed on the top of the positioning component 3, an upper clamp 5 is movably installed on the top of the lower clamp 4, and contact clamping blocks 6 are movably installed inside the lower clamp 4 and the upper clamp 5. The positioning component 3 includes a mounting base 31, and a mounting hole 32 is opened inside the mounting base 31. A rotating shaft 33 and a rotating shaft 34 are movably installed inside the mounting hole 32, respectively. Movable frames 35 are fixedly installed on the outer sides of both rotating shafts 33 and 34. A transmission gear 36 is fixedly installed on the left side of rotating shafts 33 and 34. A rotating rod 37 is movably connected to the inner side of the movable frame 35, and a turntable 38 is fixedly installed on the right side of rotating shaft 33.

[0024] By rotating the crank handle mounted on the outside of the turntable 38 on the right side of the mounting base 31, the rotating shaft 33 connected to the turntable 38 is rotated. The transmission gear 36 meshing on the left side of the rotating shaft 33 and the rotating shaft 34 drives the rotating shaft 33 and the rotating shaft 34 to rotate in opposite directions. The rotating shaft 33 and the rotating shaft 34 drive the movable frame 35 on its outer side to rotate upward. The rotating rod 37 on the inner side of the movable frame 35 abuts against the front and rear sides of the specimen, and the offset specimen is centered between the lower clamp 4 and the upper clamp 5, reducing errors and minimizing the impact on the test.

[0025] like Figure 4 and Figure 5 As shown, the lower clamp 4 and the upper clamp 5 are respectively provided with a first groove 41 and a second groove 51 on their inner sides. The lower clamp 4 and the upper clamp 5 are respectively provided with a first fixing hole 42 and a second fixing hole 52 on their left and right sides. The contact clamp 6 includes a clamp 61 and a side fixing plate 62 fixedly connected to the outside of the clamp 61. The clamp 61 and the side fixing plate 62 are respectively movably engaged in the interior of the first groove 41 and the second groove 51. The interior of the first fixing hole 42 and the second fixing hole 52 is respectively movably installed with a hand-tightening bolt 64 located in the side fixing plate 62.

[0026] When the clamping block 61 is damaged after use, the hand-tightening bolt 64 located inside the fixing hole 42 and fixing hole 52 can be rotated along the side of the lower clamp 4 and the upper clamp 5. The hand-tightening bolt 64 will disengage from the through hole provided in the side fixing plate 62. Then, the clamping block 61 can be pulled out along the clamping slot 41 and clamping slot 51 to replace it, thus eliminating the need to replace the lower clamp 4 or the upper clamp 5 as a whole, reducing maintenance and replacement costs.

[0027] like Figure 2 As shown, the mounting holes 32 are located inside the mounting base 31 and are arranged symmetrically front and back.

[0028] The mounting holes 32 are symmetrically arranged in front and back within the mounting base 31, so that the specimen can be moved from the front and back sides by the rotating rod 37 to make it centrally positioned within the lower clamp 4 and the upper clamp 5, which facilitates positioning.

[0029] like Figure 3 As shown, the transmission gears 36 on the right side of shaft 1 33 and shaft 2 34 are identically configured and mesh with each other.

[0030] The transmission gear 36 is engaged to ensure that the rotating shaft 33 and the rotating shaft 34 rotate synchronously in opposite directions.

[0031] like Figure 3 As shown, a rubber sleeve is fixed to the outside of the rotating rod 37.

[0032] The rubber sleeve increases friction by contacting the specimen, ensuring stable contact.

[0033] like Figure 2 As shown, a crank handle is movably connected to the outer side of the turntable 38.

[0034] The crank handle facilitates operation, and when released, the movable frame 35 and the rotating rod 37 flip outward to avoid obstructing the lower clamp 4 and the upper clamp 5, making it convenient to pick up and put down the specimen.

[0035] like Figure 4 and Figure 5 As shown, the left and right sides of the card block 61 are provided with alignment grooves 63, which are adapted to the card slot 41 and the card slot 51 respectively.

[0036] The hand-tightened bolt 64 penetrates the side fixing plate 62 and is threaded into the inside of fixing hole 42 and fixing hole 52.

[0037] By setting the alignment groove 63, it is locked in the first groove 41 and the second groove 51 to provide vertical positioning. With the help of the hand-tightened bolt 64 inserted into the side fixing plate 62, the connection is guaranteed to be stable.

[0038] The working principle of this new Marshall stability tester will be explained in detail below.

[0039] like Figures 1 to 5 As shown, the specimen is placed inside the clamping block 61 between the lower clamp 4 and the upper clamp 5 by lifting the upper clamp 5. Then, the crank handle mounted on the outside of the turntable 38 on the right side of the mounting base 31 drives the rotating shaft 33 connected to the turntable 38 to rotate. The transmission gear 36 meshing on the left side of the rotating shaft 33 and the rotating shaft 34 drives the rotating shaft 33 and the rotating shaft 34 to rotate in opposite directions. The rotating shaft 33 and the rotating shaft 34 drive the movable frame 35 on its outer side to rotate upward. Thus, the rotating rod 37 on the inner side of the movable frame 35 abuts against the front and rear sides of the specimen, and the offset is removed. The specimen is centered between the lower clamp 4 and the upper clamp 5, which facilitates operation, reduces errors, and minimizes the impact on the test. If the locking block 61 set in the first clamping slot 41 and the second clamping slot 51 is damaged after use, the hand-tightening bolt 64 located inside the first fixing hole 42 and the second fixing hole 52 is rotated along the side of the lower clamp 4 and the upper clamp 5. The hand-tightening bolt 64 is disengaged from the through hole set in the side fixing plate 62. Then, the locking block 61 drives the side fixing plate 62 to be pulled out along the first clamping slot 41 and the second clamping slot 51 for replacement, thereby reducing maintenance and replacement costs.

[0040] The above generally describes the present invention in detail. However, it is obvious to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A novel Marshall stability tester, comprising a tester body (1) and a lifting platform (2) disposed on the top of the tester body (1), characterized in that: A positioning component (3) is fixedly installed on the top of the lifting platform (2), a lower clamp (4) is fixedly installed on the top of the positioning component (3), an upper clamp (5) is movably installed on the top of the lower clamp (4), and a contact clamp (6) is movably installed inside the lower clamp (4) and the upper clamp (5). The positioning component (3) includes a mounting base (31), and the mounting base (31) has a mounting hole (32) inside. A rotating shaft one (33) and a rotating shaft two (34) are movably mounted inside the mounting hole (32). A movable frame (35) is fixedly mounted on the outer side of the rotating shaft one (33) and the rotating shaft two (34). A transmission gear (36) is fixedly mounted on the left side of the rotating shaft one (33) and the rotating shaft two (34). A rotating rod (37) is movably connected to the inner side of the movable frame (35). A turntable (38) is fixedly mounted on the right side of the rotating shaft one (33).

2. The novel Marshall stability tester according to claim 1, characterized in that: The lower clamp (4) and the upper clamp (5) are respectively provided with a first slot (41) and a second slot (51) on their inner sides. The lower clamp (4) and the upper clamp (5) are respectively provided with a first fixing hole (42) and a second fixing hole (52) on their left and right sides. The contact clamp (6) includes a clamp (61) and a side fixing plate (62) fixedly connected to the outside of the clamp (61). The clamp (61) and the side fixing plate (62) are respectively movably engaged in the interior of the first slot (41) and the second slot (51). The interior of the first fixing hole (42) and the second fixing hole (52) is respectively movably installed with a hand-tightening bolt (64) located in the side fixing plate (62).

3. The novel Marshall stability tester according to claim 1, characterized in that: The mounting holes (32) are located inside the mounting base (31) and are arranged symmetrically front and back.

4. The novel Marshall stability tester according to claim 1, characterized in that: The transmission gears (36) on the right side of the first rotating shaft (33) and the second rotating shaft (34) are identically configured and mesh with each other.

5. The novel Marshall stability tester according to claim 1, characterized in that: The rotating rod (37) is externally fixed with a rubber sleeve.

6. The novel Marshall stability tester according to claim 1, characterized in that: A crank handle is movably connected to the outer side of the turntable (38).

7. A novel Marshall stability tester according to claim 2, characterized in that: The card block (61) is provided with alignment grooves (63) on the left and right sides, and the alignment grooves (63) are adapted to the card slot one (41) and card slot two (51) respectively.

8. A novel Marshall stability tester according to claim 2, characterized in that: The hand-tightening bolt (64) penetrates the side fixing plate (62) and is threaded into the inside of fixing hole one (42) and fixing hole two (52).

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