Asphalt mixture splitting test clamp

Abstract

An asphalt mixture splitting test fixture relates to a splitting test device and comprises a first lateral connecting plate and a second lateral connecting plate which are arranged at an interval left and right, and a pair of rotating threaded rods symmetrically arranged between the first lateral connecting plate and the second lateral connecting plate in parallel, a first clamping jaw is fixedly arranged on the side, close to the second lateral connecting plate, of the moving plate, a second clamping jaw matched with the first clamping jaw is fixedly arranged on the side, close to the moving plate, of the second lateral connecting plate, and the device further comprises a driving assembly used for driving the rotating threaded rod to rotate so as to drive the moving plate to move. When the driving assembly works, the two steering threaded rods are driven to rotate at the same time, the two steering threaded rods rotate together to enable the movable plate to move, the mode of driving the movable plate to move enables the movable plate to move more stably, and stress on a test piece in the test process is kept uniform.

Description

Technical Field

[0001] The utility model relates to a splitting test device, in particular to an asphalt mixture splitting test fixture. Background Art

[0002] In recent years, with the rapid development of China's road traffic, the application of asphalt pavement has become more and more extensive. Asphalt mixture is a composite material, the main components of which include asphalt, coarse aggregate, fine aggregate, mineral powder, etc., and some will also add polymers and wood cellulose. These materials of different quality and quantity will be mixed to form different structures and have different mechanical properties. The asphalt mixture splitting test refers to the use of a splitting test machine to split the asphalt mixture to evaluate the crack resistance of the asphalt mixture. The splitting test machine is a commonly used material testing equipment that can perform mechanical property tests such as tension, compression, bending and splitting on the material. In the asphalt mixture splitting test, the sample is placed on the fixture of the test machine and a certain force is applied to cause the sample to split and break. By measuring the splitting force and splitting displacement of the sample, the crack resistance performance indicators of the asphalt mixture, such as splitting strength and splitting toughness, can be calculated. These indicators are of great significance for evaluating the quality and performance of asphalt mixtures.

[0003] When conducting a splitting test, two upper and lower pads are placed on the cylindrical asphalt mixture test piece, and a relative linear load is applied to cause it to break along the diameter direction of the test piece, and the compressive strength of the test piece is measured. The existing clamps are relatively simple and lack flexibility. They cannot perform clamping tests on specimens of various sizes, which brings inconvenience to the test operation. At the same time, the structure of the existing test fixture device is relatively complex, and the convenience of clamping operation needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to propose an asphalt mixture splitting test fixture to solve the technical defects of the existing fixture, such as single specification, complex structure, complex operation process, and difficulty in conducting experiments; and the fixture is prone to eccentric force when conducting asphalt mixture splitting tests, resulting in inaccurate test results; the fixture has a complex structure and high cost, which is not conducive to its widespread use.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A asphalt mixture splitting test fixture includes a first lateral connecting plate and a second lateral connecting plate arranged at a left and right interval, a pair of rotating threaded rods symmetrically and parallelly arranged between the first lateral connecting plate and the second lateral connecting plate, a movable plate threadedly connected to the pair of rotating threaded rods, a first clamping jaw fixedly arranged on a side of the movable plate close to the second lateral connecting plate, a second clamping jaw cooperating with the first clamping jaw fixedly arranged on a side of the second lateral connecting plate close to the movable plate, and also includes a driving component for driving the rotating threaded rod to rotate and thereby drive the movable plate to move.

[0007] Furthermore, the driving assembly includes a driving wheel symmetrically arranged on the end of the same side of the two rotating threaded rods, the axis of the driving wheel is connected to the rotating threaded rod, the two driving wheels are transmission-connected, and the outer side of one of the driving wheels is connected to an external driving member.

[0008] Furthermore, the external driving component is a driving motor, and the output end of the driving motor is connected to the axle center of the driving wheel.

[0009] Furthermore, the external driving member is a manual rocker, which includes a connecting rod and a rocker handle fixedly connected to the outer end of the connecting rod, and the inner end of the connecting rod is connected to the axis of the driving wheel.

[0010] Furthermore, the first clamping jaw and the second clamping jaw have the same structure. The first clamping jaw includes a connecting column with one end connected to the moving plate, and the other end of the connecting column is connected to the strip-shaped clamping block.

[0011] Furthermore, an anti-slip sheet is evenly and fixedly connected to the outer wall on one side opposite to the first clamping jaw and the second clamping jaw. The anti-slip sheet is an elastic rubber sheet, and the anti-slip sheets on both sides are inclined outwards.

[0012] Furthermore, the two driving wheels are connected via a conveyor belt transmission.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] When the driving assembly of the utility model is working, it drives the two steering threaded rods to rotate at the same time, and the two steering threaded rods rotate together to move the movable plate. This way of driving the movable plate to move can make the movable plate move more smoothly, and keep the force on the test piece uniform during the test; the end of the connecting column of the first clamping jaw is fixedly connected with a strip claw block, which can relatively stably position the test sample to prevent the test sample from shifting during the splitting process; the structure of the clamp is relatively simple, the clamping operation is also more convenient, and it is easy to maintain. The external driving part is a driving motor, and it can also be adjusted to manual mode by changing to a connecting rod and a crank, and the manual / electric mode switching has a wider applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 This is a schematic structural diagram of the first embodiment of the utility model;

[0017] Figure 2 This is a schematic structural diagram of the second embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the clamp structure of the utility model;

[0019] Figure 4 It is a side view schematic diagram of the first lateral connecting plate of the utility model;

[0020] In the figure: 1. first lateral connecting plate, 2. rotating threaded rod, 3. second lateral connecting plate, 4. moving plate, 5. first clamping jaw, 501. connecting column, 502. strip-shaped claw block, 6. second clamping jaw, 7. driving assembly, 701. driving wheel, 702. connecting rod, 703. cranking handle, 8. driving motor, 9. anti-slip sheet. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1

[0023] like Figure 1 , 3 As shown in Figure 4, an asphalt mixture splitting test fixture includes a first lateral connecting plate 1 and a second lateral connecting plate 3 which are spaced apart from each other, a pair of rotating threaded rods 2 which are symmetrically and parallelly arranged between the first lateral connecting plate 1 and the second lateral connecting plate 3, a movable plate 4 is threadedly connected to the pair of rotating threaded rods 2, a first clamping jaw 5 is fixedly arranged on one side of the movable plate 4 close to the second lateral connecting plate 3, a second clamping jaw 6 which cooperates with the first clamping jaw 5 is fixedly arranged on one side of the second lateral connecting plate 3 close to the movable plate 4, and also includes a driving component 7 for driving the rotating threaded rods 2 to rotate and thereby drive the movable plate 4 to move.

[0024] Specifically, as shown in the figure, the driving assembly includes a driving wheel 701 symmetrically arranged on the end of the same side of two rotating threaded rods 2, the axis of the driving wheel 701 is connected to the rotating threaded rod 2, the two driving wheels 701 are transmission connected, and the outer side of one of the driving wheels 701 is connected to an external driving member.

[0025] Specifically, as shown in the figure, the external driving component is a driving motor 8, and the output end of the driving motor 8 is connected to the axis of the driving wheel 701.

[0026] Specifically, as shown in the figure, the first clamping jaw 5 and the second clamping jaw 6 have the same structure. The first clamping jaw 5 includes a connecting column 501 having one end connected to the moving plate 4 , and the other end of the connecting column 501 is connected to the bar-shaped clamping block 502 .

[0027] Specifically, as shown in the figure, anti-skid sheets 9 are evenly fixedly connected to the outer walls of the first clamping jaw 5 and the second clamping jaw 6 on one side opposite to each other. The anti-skid sheets 9 are elastic rubber sheets, and the anti-skid sheets on both sides are inclined outwards.

[0028] Specifically, as shown in the figure, the two driving wheels 701 are connected via a conveyor belt transmission.

[0029] Example 2

[0030] Different from the first embodiment, the external driving member of the present embodiment is in manual mode. Specifically, Figure 2 As shown, the external driving member is a manual rocker, which includes a connecting rod 702 and a rocker handle 703 fixedly connected to the outer end of the connecting rod 702 , and the inner end of the connecting rod 702 is connected to the axis of the driving wheel 701 .

[0031] Specifically, the specific implementation principle of the utility model is:

[0032] (1) The specimen is stably placed between the first clamping jaw 5 and the second clamping jaw 6, and the driving motor 8 is operated to drive the corresponding driving wheel 701 to rotate; or in manual mode, the corresponding driving wheel 701 can be driven to rotate by shaking the crank 703;

[0033] (2) The driving wheel 701 rotates under the action of the belt connection, driving the two steering threaded rods 2 to rotate, and the movable plate 4 and the first clamping jaw 5 move accordingly, so as to adjust the distance between the two clamping jaws, thereby clamping the sample between the two clamping jaws;

[0034] (3) During the splitting test, the outer walls of the first clamping jaw 5 and the second clamping jaw 6 are evenly fixed with anti-slip sheets 9, and the anti-slip sheets 9 are tilted outward to ensure the stability of the test sample;

[0035] (4) After the test is completed, record the data.

[0036] When the driving assembly of the utility model is working, it drives the two steering threaded rods to rotate at the same time, and the two steering threaded rods rotate together to move the movable plate. This way of driving the movable plate to move can make the movable plate move more smoothly, and keep the force on the test piece uniform during the test; the end of the connecting column of the first clamping jaw is fixedly connected with a strip claw block, which can relatively stably position the test sample to prevent the test sample from shifting during the splitting process; the structure of the clamp is relatively simple, the clamping operation is also more convenient, and it is easy to maintain. The external driving part is a driving motor, and it can also be adjusted to manual mode by changing to a connecting rod and a crank, and the manual / electric mode switching has a wider applicability.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An asphalt mixture splitting test fixture, characterized in that: The invention comprises a first lateral connecting plate (1) and a second lateral connecting plate (3) which are arranged at a left-right interval, a pair of rotating threaded rods (2) which are symmetrically and parallelly arranged between the first lateral connecting plate (1) and the second lateral connecting plate (3), a movable plate (4) which is threadedly connected to the pair of rotating threaded rods (2), a first clamping jaw (5) being fixedly arranged on a side of the movable plate (4) close to the second lateral connecting plate (3), a second clamping jaw (6) which cooperates with the first clamping jaw (5) being fixedly arranged on a side of the second lateral connecting plate (3) close to the movable plate (4), and a driving assembly (7) for driving the rotating threaded rods (2) to rotate so as to drive the movable plate (4) to move.

2. The asphalt mixture splitting test fixture according to claim 1, characterized in that: The driving assembly comprises a driving wheel (701) symmetrically arranged on the ends of the same side of two rotating threaded rods (2), the axis of the driving wheel (701) being connected to the rotating threaded rod (2), the two driving wheels (701) being transmission-connected to each other, and the outer side of one of the driving wheels (701) being connected to an external driving member.

3. The asphalt mixture splitting test fixture according to claim 2, characterized in that: The external driving component is a driving motor (8), and the output end of the driving motor (8) is connected to the axis of the driving wheel (701).

4. The asphalt mixture splitting test fixture according to claim 3, characterized in that: The external driving member is a manual rocker, which comprises a connecting rod (702) and a rocking handle (703) fixedly connected to the outer end of the connecting rod (702), and the inner end of the connecting rod (702) is connected to the axis of the driving wheel (701).

5. The asphalt mixture splitting test fixture according to claim 4, characterized in that: The first clamping jaw (5) and the second clamping jaw (6) have the same structure. The first clamping jaw (5) comprises a connecting column (501) having one end connected to the movable plate (4), and the other end of the connecting column (501) is connected to the strip-shaped clamping block (502).

6. The asphalt mixture splitting test fixture according to claim 5, characterized in that: An anti-slip sheet (9) is evenly and fixedly connected to the outer wall of one side opposite to the first clamping jaw (5) and the second clamping jaw (6); the anti-slip sheet (9) is an elastic rubber sheet, and the anti-slip sheets on both sides are inclined outwards.

7. The asphalt mixture splitting test fixture according to claim 5, characterized in that: The two driving wheels (701) are connected via a conveyor belt transmission.

Images