asphalt mixture rutting tester

Abstract

The utility model relates to an asphalt mixture rutting testing machine, including work table, test table, lifting mechanism and rolling wheel subassembly, the test table includes a plurality of settings in work table upper end's stand I, a plurality of stand I is respectively sleeved with sliding sleeve I, a plurality of sliding sleeve I is commonly connected with a platform for placing asphalt test block, the lifting mechanism includes the abutment wheel of setting in platform bottom and the cylinder and wedge block of setting in work table upper end, the lower end of abutment wheel abuts on the upper surface of wedge block, and the telescopic rod of cylinder is connected with wedge block, the rolling wheel subassembly return process of this testing machine, platform can descend, make rubber wheel and asphalt test block separate, avoided the interference of invalid reciprocating action to test result, and when rolling wheel subassembly advances again, platform rises and cooperates and rolls, ensure the effective one -way rolling of asphalt test block, strengthened the authenticity and reliability of test result.

Description

Technical Field

[0001] This utility model relates to the field of asphalt testing technology, and in particular to an asphalt mixture rutting tester. Background Technology

[0002] Rutting test machines are essential equipment for evaluating the high-temperature stability and durability of asphalt mixtures. In road engineering, asphalt mixtures are a key material for road paving, and their performance has a crucial impact on road service life and traffic safety. By simulating the repeated compaction of asphalt pavement by vehicle wheels, rutting test machines can accurately measure the rutting depth of asphalt mixtures under different temperature, pressure, and load conditions, thus providing road designers with a scientific basis. Common rutting test machines typically employ a reciprocating compaction method. These machines are widely used in scientific research and engineering testing, making significant contributions to the development of road engineering.

[0003] However, in actual road use scenarios, most roads are one-way lanes, and the rolling direction of the wheels is singular, that is, along the direction of the wheels' movement. The reciprocating rolling conditions simulated by existing rut testing machines are somewhat different from the actual road use conditions, and the test results will affect the road designers' accurate assessment and prediction of road performance. Utility Model Content

[0004] To address the problems existing in the background technology, this utility model provides an asphalt mixture rutting test machine that can simulate unidirectional rolling, which will help improve the effectiveness and reliability of the test results and better meet the actual needs of road engineering.

[0005] Technical Solution: An asphalt mixture rutting test machine includes a worktable, a test platform, a lifting mechanism, and a compaction wheel assembly. The test platform includes multiple columns I mounted on the upper part of the worktable, each column I being fitted with a sliding sleeve I, and the sliding sleeves I being connected to a platform for placing asphalt test blocks. The lifting mechanism includes an abutment wheel mounted on the bottom of the platform and a cylinder and a wedge block mounted on the upper part of the worktable. The lower end of the abutment wheel abuts against the upper surface of the wedge block, and the telescopic rod of the cylinder is connected to the wedge block. When the cylinder drives the wedge block to move horizontally, the contact position between the wedge block and the abutment wheel changes, thereby adjusting the platform height. The compaction wheel assembly is mounted on the upper side of the platform and can repeatedly compact the asphalt test blocks on the platform.

[0006] Furthermore, it is particularly preferred that the compaction wheel assembly includes multiple columns II disposed on the upper part of the workbench, multiple parallel horizontal slide rails disposed on the multiple columns II, a sliding sleeve II slidably connected to each of the multiple horizontal slide rails, the multiple sliding sleeves II being connected together to a plate, a rubber wheel disposed at the bottom of the plate and a drive mechanism connected to the side, the drive mechanism being able to drive the plate to reciprocate along the horizontal slide rails, thereby driving the rubber wheel to repeatedly compact the asphalt test block.

[0007] Furthermore, it is particularly preferred that vertically arranged guide rail pairs are respectively provided between the flat plate and the multiple sliding sleeves II.

[0008] Furthermore, it is particularly preferred that the drive mechanism includes a motor, connecting rod I and connecting rod II. The motor is mounted on the workbench via a frame. One end of connecting rod I is connected to the motor shaft, and the other end is hinged to one end of connecting rod II via a pin. The other end of connecting rod II is hinged to the plate via a pin.

[0009] Furthermore, it is particularly preferred that a counterweight frame is provided on the upper side of the plate, and a counterweight is provided inside the counterweight frame.

[0010] Furthermore, it is particularly preferred that the slide includes a proximity sensor disposed at both ends of the horizontal slide rail, and a trigger plate is disposed on the slide sleeve II, which triggers a signal when it approaches the proximity sensor.

[0011] Furthermore, it is particularly preferred that the platform is provided with longitudinally arranged guide rails, and the bottom of the asphalt test block is provided with guide grooves adapted to the guide rails.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. During the return process of the rolling wheel assembly of this testing machine, the platform can be lowered to separate the rubber wheel from the asphalt test block, avoiding interference from invalid reciprocating motion on the test results; when the rolling wheel assembly moves forward again, the platform rises to cooperate with the rolling, ensuring effective unidirectional rolling of the asphalt test block, and enhancing the authenticity and reliability of the test results.

[0014] 2. This utility model, by setting multiple horizontal slide rails and sliding sleeves in conjunction with a flat plate, makes the rolling motion of the rubber wheel more stable. Simultaneously, the drive mechanism uses a motor in conjunction with connecting rods I and II to convert the motor's rotational motion into the linear reciprocating motion of the flat plate. This not only achieves stable rolling drive but also allows for flexible adjustment of the rolling speed and stroke by adjusting the motor speed and connecting rod length, meeting the needs of different testing conditions and enhancing the versatility of the testing machine.

[0015] 3. A vertical guide rail pair is provided between the flat plate and the sliding sleeve of this utility model to ensure that the weight of the rolling wheel assembly can be accurately applied to the asphalt test block when the self-weight of the rolling wheel assembly acts downward. In addition, a counterweight frame and counterweight weight are provided on the upper side of the flat plate, so that the weight of the rolling wheel assembly can be adjusted according to the test needs, thereby simulating the effect of different vehicle loads on asphalt mixture.

[0016] 4. This utility model, by setting proximity sensors at both ends of the horizontal slide rail, and in conjunction with the trigger plate on the slide sleeve II, can trigger a signal when the rolling wheel assembly approaches the end, control the cylinder to drive the test bench to rise or fall, and ensure that the rolling conditions are consistent in each cycle.

[0017] 5. The platform of this utility model is equipped with a longitudinal guide rail that cooperates with the bottom guide groove of the asphalt test block, which effectively prevents the asphalt test block from shifting or tilting during the rolling process, and allows for the rapid installation of the asphalt test block. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the test bench and lifting mechanism of this utility model.

[0020] Figure 3 This is a structural schematic diagram of the rolling wheel assembly, drive mechanism, and counterweight frame of this utility model.

[0021] Figure 4 This utility model Figure 3 Enlarged diagram of point A in the middle.

[0022] The above-mentioned attached drawings include the following reference numerals: 1. Workbench, 2. Test bench, 21. Column I, 22. Sliding sleeve I, 23. Platform, 24. Asphalt test block, 3. Lifting mechanism, 31. Abutment wheel, 32. Cylinder, 33. Wedge block, 34. Linear guide rail pair, 4. Rolling wheel assembly, 41. Column II, 42. Horizontal slide rail, 43. Sliding sleeve II, 44. Rubber wheel, 45. Flat plate, 56. Guide rail pair, 5. Drive mechanism, 51. Motor, 52. Connecting rod I, 53. Connecting rod II, 54. Frame, 6. Counterweight frame, 61. Counterweight weight, 7. Proximity sensor, 8. Trigger plate, 9. Guide slide rail, 91. Guide groove. Detailed Implementation

[0023] Although this invention may be described with respect to a particular application or industry, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "above," "below," "upward," "downward," etc., are used to describe the drawings and not to indicate a limitation on the scope of the invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0024] like Figure 1-4 As shown, this testing machine includes a workbench 1, a test bench 2, a lifting mechanism 3, and a compaction wheel assembly 4. The test bench 2 is mounted on the workbench 1 and includes multiple columns I 21. Sliding sleeves I 22 are fitted onto each column I 21, and a platform 23 connects the sliding sleeves I 22. The platform 23 is used to place asphalt test blocks 24 and is equipped with longitudinal guide rails 9. The guide grooves 91 at the bottom of the asphalt test block 24 cooperate with the guide rails 9 to ensure the test block is stably placed on the platform and to prevent displacement or tilting during compaction. The asphalt test block 24 is typically a rectangular mold filled with asphalt.

[0025] like Figure 2 As shown, the lifting mechanism 3 is used to adjust the height of the platform 23. It includes an abutment wheel 31, a cylinder 32, and a wedge block 33. The abutment wheel 31 is fixed to the bottom of the platform 23, and the lower end of the abutment wheel 31 contacts the upper surface of the wedge block 33. The telescopic rod of the cylinder 32 is connected to the wedge block 33. When the cylinder 32 extends or retracts, it pushes the wedge block 33 to move horizontally, changing the contact position between the wedge block 33 and the abutment wheel 31, thereby adjusting the lifting of the platform 23. In addition, a linear guide rail pair 34 is provided at the bottom of the wedge block 33, and the wedge block 33 can move along the linear guide rail pair 34.

[0026] It should be noted that the upper surface of the wedge block 33 is an inclined plane, and the top and bottom of the inclined plane also have horizontal surfaces. The position and height of the abutment wheel 31 change when it moves on the inclined plane, but the height remains unchanged when it moves on the horizontal plane.

[0027] like Figure 1 and 3As shown, the compaction wheel assembly 4 is set above the platform 23. It includes multiple columns II 41. The lower end of the columns II 41 is fixed on the workbench 1, and multiple parallel horizontal slide rails 42 are set on the upper end of the columns II 41. Sliding sleeves II 43 are slidably connected on the horizontal slide rails 42. The sliding sleeves II 43 are connected to each other by a plate 45. A rubber wheel 44 is installed at the bottom of the plate 45. The rubber wheel 44 is used to compact the upper surface of the asphalt test block 24. The side of the plate 45 is connected to the drive mechanism 5. Specifically, in this embodiment, the drive mechanism 5 includes a motor 51, a connecting rod I 52 and a connecting rod II 53. The motor 51 is fixed on the workbench 1 by a frame 54. The rotating shaft of the motor 51 is connected to one end of the connecting rod I 52. The other end of the connecting rod I 52 is hinged to one end of the connecting rod II 53 by a pin. The other end of the connecting rod II 53 is hinged to the plate 45 by a pin. When driven by motor 51, the rotational motion is converted into linear reciprocating motion of plate 45 along transverse slide rail 42 through linkage mechanism, thereby driving rubber wheel 44 to perform unidirectional repeated rolling on asphalt test block 24.

[0028] The lifting mechanism 3 can adjust the height of the platform 23. The platform 23 can descend when the compaction wheel assembly 4 returns, so that the rubber wheel 44 separates from the asphalt test block 24 to avoid ineffective compaction. When the rubber wheel 44 moves forward again, it rises to restore contact with the test block. This achieves unidirectional compaction, making the experiment closer to the actual road surface conditions.

[0029] refer to Figure 4 In order to ensure that the weight of the compaction wheel assembly 4 is accurately applied to the asphalt test block 24, a vertical guide rail pair 56 is provided between the plate 45 and the sliding sleeve II 43. Both the upper and lower ends of the guide rail pair 56 are equipped with limit parts to limit the position of the slider on the guide rail.

[0030] In addition, a counterweight frame 6 is provided on the upper side of the plate 45. Different weights 61 can be placed in the counterweight frame 6 according to the test requirements to simulate the effect of different vehicle loads on asphalt mixture. The counterweight frame 6 is welded to the plate 45 and has multiple layers inside, in which rectangular metal counterweights 61 can be inserted.

[0031] In addition, to achieve automated control, proximity sensors 7 are respectively installed at both ends of the transverse slide rail 42, and trigger plates 8 are installed on the sliding sleeve II 43. When the sliding sleeve II 43 moves along the transverse slide rail 42, the trigger plate 8 will approach the proximity sensor 7 at either end and trigger it. The trigger signal is transmitted to the cylinder controller, which controls the movement of the wedge block 33 to realize the rise or fall of the platform 23, ensuring that the rolling conditions are consistent in each cycle and avoiding the rubber wheel 44 from causing ineffective rolling on the asphalt test block 24 during the return process.

[0032] Through the above structural design, this testing machine can effectively simulate the actual rolling of asphalt mixture by wheels on a one-way road, improve the authenticity and reliability of the test results, and provide a more scientific and accurate reference for road engineering design.

[0033] The embodiments described above are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications, improvements, and substitutions without departing from the inventive concept, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. An asphalt mixture rutting test machine, characterized in that, It includes a workbench (1), a test bench (2), a lifting mechanism (3), and a rolling wheel assembly (4); The test bench (2) includes multiple columns I (21) set on the upper end of the workbench (1), and multiple sliding sleeves I (22) are respectively fitted on the multiple columns I (21). The multiple sliding sleeves I (22) are connected to a platform (23) for placing asphalt test blocks (24). The lifting mechanism (3) includes an abutment wheel (31) at the bottom of the platform (23) and a cylinder (32) and a wedge block (33) at the top of the workbench (1). The lower end of the abutment wheel (31) abuts against the upper surface of the wedge block (33). The telescopic rod of the cylinder (32) is connected to the wedge block (33). When the cylinder (32) drives the wedge block (33) to move horizontally, the contact position between the wedge block (33) and the abutment wheel (31) changes, thereby realizing the adjustment of the height of the platform (23). The roller assembly (4) is located on the upper side of the platform (23), and the roller assembly (4) can repeatedly roll the asphalt test block (24) on the platform (23).

2. The asphalt mixture rutting test machine according to claim 1, characterized in that, The rolling wheel assembly (4) includes multiple columns II (41) set on the upper end of the workbench (1). Multiple parallel horizontal slide rails (42) are set on the multiple columns II (41). A sliding sleeve II (43) is slidably connected to each of the multiple horizontal slide rails (42). The multiple sliding sleeves II (43) are connected to a plate (45). A rubber wheel (44) is set at the bottom of the plate (45) and the side is connected to a drive mechanism (5). The drive mechanism (5) can drive the plate (45) to reciprocate along the horizontal slide rails (42), thereby driving the rubber wheel (44) to repeatedly roll the asphalt test block (24).

3. The asphalt mixture rutting test machine according to claim 2, characterized in that, Vertically arranged guide rail pairs (56) are respectively provided between the plate (45) and the multiple sliding sleeves II (43).

4. The asphalt mixture rutting test machine according to claim 3, characterized in that, The drive mechanism (5) includes a motor (51), a connecting rod I (52) and a connecting rod II (53). The motor (51) is mounted on the workbench (1) via a frame (54). One end of the connecting rod I (52) is connected to the rotating shaft of the motor (51), and the other end is hinged to one end of the connecting rod II (53) via a pin. The other end of the connecting rod II (53) is hinged to the plate (45) via a pin.

5. The asphalt mixture rutting test machine according to claim 4, characterized in that, A counterweight frame (6) is provided on the upper side of the plate (45), and a counterweight (61) is provided inside the counterweight frame (6).

6. The asphalt mixture rutting test machine according to claim 5, characterized in that, It also includes a proximity sensor (7), which is disposed at both ends of the horizontal slide rail (42), and a trigger piece (8) is disposed on the slide sleeve II (43). When the trigger piece (8) approaches the proximity sensor (7), it triggers a signal.

7. The asphalt mixture rutting test machine according to claim 6, characterized in that, The platform (23) is provided with a longitudinally arranged guide rail (9), and the bottom of the asphalt test block (24) is provided with a guide groove (91) adapted to the guide rail (9).

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