Impact rolling model test device

Abstract

The utility model belongs to the field of civil engineering models, and particularly relates to an impact rolling model test device which comprises a model box, an impact wheel, two walking rails arranged above the model box and a linear motion mechanism arranged above the two walking rails in the middle. A test material is laid in the model box, a first connecting rod and a second connecting rod walk on the two walking rails, and the first connecting rod and the second connecting rod are respectively connected with an impact wheel through a connecting rod mechanism; a shifting piece is fixed to the lower portion of the linear motion mechanism and located between the first connecting rod and the second connecting rod, and shifting holes corresponding to the first connecting rod and the second connecting rod are formed in the shifting piece. The length of the shifting piece is smaller than the distance between the first connecting rod and the second connecting rod, so that the shifting piece is only in contact with one of the first connecting rod and the second connecting rod; according to the bidirectional impact rolling device, the impact wheel does not need to be reset manually, bidirectional multi-time impact rolling on a test material can be realized, and the test efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of civil engineering models, and in particular relates to an impact rolling model test device. Background Art

[0002] Impact roller, also known as impact compactor or impact roller, is a special engineering compaction machine and a new type of towed equipment belonging to the roller. The working principle of impact roller is to use large traction equipment (such as a loader) to tow one or more impact wheels, and use the weight of the impact wheel itself and the impact force generated when moving forward to crush and compact the road surface or roadbed materials. The impact wheel rolls continuously on the ground and generates impacts. Its center of gravity will alternately change up and down during the rolling process, forming a powerful shock wave. These shock waves can propagate deep underground, similar to the effect of seismic waves, and produce a deep compaction effect on the soil or paving materials.

[0003] At present, on-site construction for road compaction mainly relies on relevant specifications and experience, as well as the laying of test sections. However, due to the different gradations of road materials at each site, more on-site experiments or indoor simulation experiments are still required to obtain the optimal compaction process. The current impact rolling model generally includes a simulated soil layer, an impact wheel, a power device for driving the impact wheel, and sensors such as a pressure box buried in the soil layer. Patent CN102661915A discloses an impact rolling model test device that is powered by a motor and uses a steel wire rope to pull the impact wheel. The impact wheel can perform unidirectional rolling under the traction of the steel wire. However, in actual construction, multiple rolling is often used. Using an impact rolling model test device like this requires manual reset of the impact wheel at the end of each aisle, which is inconvenient.

[0004] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Utility Model Content

[0005] The utility model aims to overcome the shortcomings of the prior art and provide an impact rolling model test device.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An impact rolling model test device comprises a model box, an impact wheel, two running rails arranged above the model box, and a linear motion mechanism centrally arranged above the two running rails;

[0008] The model box is provided with test materials, and a first connecting rod and a second connecting rod are provided on the two running rails, and the first connecting rod and the second connecting rod are respectively connected to the impact wheel through a connecting rod mechanism;

[0009] A shifting piece is fixed below the linear motion mechanism, the shifting piece is located between the first connecting rod and the second connecting rod, and the shifting piece is provided with shifting holes corresponding to the first connecting rod and the second connecting rod; the length of the shifting piece is smaller than the distance between the first connecting rod and the second connecting rod, so that the shifting piece only contacts one of the first connecting rod and the second connecting rod.

[0010] Furthermore, each of the running rails is provided with a first wheel and a second wheel, the first connecting rod is fixed between the two first wheels, and the second connecting rod is fixed between the two second wheels.

[0011] Furthermore, the first wheel and the second wheel are both grooved track wheels, and the first wheel and the second wheel include an inverted U-shaped wheel seat, a small shaft rotatably connected to the inverted U-shaped wheel seat, and a wheel body fixed on the small shaft; the walking rail passes through the inverted U-shaped wheel seat.

[0012] Furthermore, the two connecting rod mechanisms are U-shaped as a whole.

[0013] Furthermore, the connecting rod mechanism includes a first connecting rod and a second connecting rod, the upper end of the first connecting rod is fixed on the first connecting rod or the second connecting rod, the lower end of the first connecting rod is hinged to the upper end of the second connecting rod, and the lower end of the second connecting rod is fixed to the end of the wheel axle of the impact wheel.

[0014] Furthermore, a buffer mechanism is hinged between the first connecting rod and the second connecting rod.

[0015] Furthermore, the dial is in an I-shape or a TU-shape.

[0016] Furthermore, the first connecting rod and the second connecting rod have the same size; and the height of the dial hole is 1.01-1.3 times the size of the first connecting rod.

[0017] Furthermore, the linear motion mechanism adopts a ball screw slide, and the shifting member is fixed on the slide of the ball screw slide.

[0018] Furthermore, support platforms are provided at both ends of the length of the model box, and both ends of the linear motion mechanism and the walking rail are fixed on the support platforms through stands.

[0019] The beneficial effects of the utility model are:

[0020] The utility model can realize bidirectional dragging of the impact wheel by respectively driving the first connecting rod and the second connecting rod to move through the dial, thereby realizing automatic reversing movement of the impact wheel; the utility model can realize bidirectional multiple impact rolling of the test material without manual resetting of the impact wheel, thereby improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0022] Figure 1 It is a schematic diagram of the main structure of an embodiment of the utility model.

[0023] Figure 2 It is a front view of the cooperation between the shifting member and the first connecting rod of the embodiment of the utility model.

[0024] Figure 3 It is a rear view schematic diagram of the matching structure of the shifting member and the first connecting rod according to an embodiment of the utility model.

[0025] Figure 4 The figure is a schematic top view of the connecting rod mechanism according to an embodiment of the utility model.

[0026] In the figure: 1-model box, 2-support platform, 3-stand, 4-screw, 5-guide rail, 6-servo motor, 7-slide, 8-shifter, 9-end plate, 10-first wheel, 11-second wheel, 12-travel rail, 13-first connecting rod, 14-second connecting rod, 15-buffer mechanism, 16-impact wheel, 17-wheel seat, 18-rod fixing part, 19-axle fixing part, 20-wheel axle, 21-first connecting rod, 22-second connecting rod. DETAILED DESCRIPTION

[0027] 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 belong to the protection scope of the present invention.

[0028] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected" and "connection" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0030] like Figures 1 to 4 As shown, an impact rolling model test device includes a model box 1, an impact wheel 16, two running rails 12 arranged above the model box 1, and a linear motion mechanism centrally arranged above the two running rails 12;

[0031] The test material is laid in the model box 1, and a first connecting rod 21 and a second connecting rod 22 are running on the two running rails 12. The first connecting rod 21 and the second connecting rod 22 are respectively connected to the impact wheel 16 through a connecting rod mechanism;

[0032] A shifting member 8 is fixed below the linear motion mechanism. The shifting member 8 is located between the first connecting rod 21 and the second connecting rod 22, and a shifting hole corresponding to the first connecting rod 21 and the second connecting rod 22 is provided on the shifting member 8. The length of the shifting member 8 is smaller than the distance between the first connecting rod 21 and the second connecting rod 22, so that the shifting member 8 only contacts one of the first connecting rod 21 and the second connecting rod 22.

[0033] like Figure 1 In the process, the linear motion mechanism drives the shifting member 8 to move rightward (forward), the first connecting rod 21 enters the shifting hole corresponding to the shifting member 8, and drives the impact wheel 16 to move rightward under the driving action of the shifting member 8, and the second connecting rod 22 naturally follows the movement driven by the impact wheel 16; after reaching the right end, the linear motion mechanism drives the shifting member 8 to move leftward (backward), the second connecting rod 22 enters the shifting hole corresponding to the shifting member 8, and drives the impact wheel 16 to move leftward under the driving action of the shifting member 8; at this time, the first connecting rod 21 naturally follows the movement driven by the impact wheel 16;

[0034] The shifting member 8 is in an I-shape or a TU-shape, so that after the first connecting rod 21 and the second connecting rod 22 enter the shifting hole, their movement in the up and down directions is restricted, so that the first connecting rod 21 and the second connecting rod 22 can always maintain lateral horizontal movement during the movement without bouncing up and down, and the two connecting rod mechanisms are in a U-shape as a whole, so that the impact wheel 16 is pulled by the front, simulating the working state of the impact wheel 16 when it is pulled by a bulldozer or a roller in actual impact rolling construction.

[0035] Further, such as Figures 1 to 4As shown, each of the walking rails 12 has a first wheel 10 and a second wheel 11 running on it, the first connecting rod 21 is fixed between the two first wheels 10, and the second connecting rod 22 is fixed between the two second wheels 11; the first wheel 10 and the second wheel 11 are both grooved track wheels, the first wheel 10 and the second wheel 11 include an inverted U-shaped wheel seat 17, a small shaft rotatably connected to the inverted U-shaped wheel seat 17, and a wheel body fixed on the small shaft; the walking rail 12 passes through the inverted U-shaped wheel seat 17; the walking rail 12 can be an angle steel rail, and the first connecting rod 21 and the second connecting rod 22 are specifically fixed on the inverted U-shaped wheel seat 17; since a connecting rod mechanism is dropped below the first wheel 10 and the second wheel 11, the first wheel 10 and the second wheel 11 can be kept running on the walking rail 12 at all times, ensuring that they are always aligned with the notch of the shifter 8, so as to drive the impact wheel 16 to change direction and crush when the movement direction of the shifter 8 is switched.

[0036] Further, such as Figures 1 to 4 As shown, the connecting rod mechanism includes a first connecting rod 13 and a second connecting rod 14, the upper end of the first connecting rod 13 is fixed to the first connecting rod 21 or the second connecting rod 22 through a rod fixing member 18; the rod fixing member 18 is rotatably sleeved on the first connecting rod or the second connecting rod; the lower end of the first connecting rod 13 is hinged to the upper end of the second connecting rod 14, and the lower end of the second connecting rod 22 is fixed to the end of the axle 20 of the impact wheel 16 through an axle fixing member 19; the axle fixing member 19 is rotatably sleeved on the axle 20 of the impact wheel 16; the first connecting rod 13 is almost in a vertical state when not under force, and will tilt when being pulled or following the impact wheel 16, so that the distance between the upper ends of the two connecting rod mechanisms changes; at the same time, the active connection mode of the connecting rod mechanism provides a prerequisite for the up and down impact movement of the impact wheel. Optionally, as Figure 2 As shown, a buffer mechanism 15 is hinged between the first connecting rod 13 and the second connecting rod 14; the buffer mechanism 15 may be an elastic buffer.

[0037] Furthermore, the first connecting rod 21 and the second connecting rod 22 have the same size; the height of the shifting hole is 1.01-1.3 times the size of the first connecting rod 21, and the height of the shifting hole can be set to 1.05, 1.1, 1.15, 1.2, or 1.25 times the diameter or height of the first connecting rod 21, so as to facilitate the first connecting rod 21 and the second connecting rod 22 to enter the shifting hole while ensuring that their upper ends do not undergo significant position changes; the shifting hole passes through the shifting piece 8 in the width direction; and the depth of the shifting hole is 0.6-5 times the diameter of the first connecting rod 21.

[0038] Optional, such as Figures 1 to 4As shown, the linear motion mechanism adopts a ball screw slide 7, and the ball screw slide 7 is an existing structure, generally including a parallel-arranged lead screw 4, a guide rail 5, a servo motor 6 and a slide 7 cooperating with the lead screw; end plates 9 are arranged at both ends of the guide rail 5, the lead screw 4 is rotatably connected to the end plate 9, and one end of the lead screw 4 is driven by the servo motor 6; the shifter 8 is fixed on the slide 7 of the ball screw slide 7.

[0039] Further, such as Figure 1 As shown, a support 2 is provided at both ends of the length of the model box 1, and the linear motion mechanism and both ends of the walking rail 12 are fixed on the support 2 through a stand 3; the support 2 provides an acceleration and deceleration distance for the impact wheel 16, so that the impact wheel 16 can move when it moves to the test material position on the model box 1.

[0040] The utility model can realize bidirectional dragging of the impact wheel 16, thereby realizing automatic reversing movement of the impact wheel 16; the utility model can realize bidirectional multiple impact rolling of the test material without manual resetting of the impact wheel 16, thereby improving the test efficiency.

[0041] 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 are within the scope of protection of the pending claims of the present invention.

Claims

1. An impact rolling model test device, characterized in that: It comprises a model box (1), an impact wheel (16), two running rails (12) arranged above the model box (1), and a linear motion mechanism centrally arranged above the two running rails (12); The model box (1) is provided with test materials, and a first connecting rod (21) and a second connecting rod (22) are provided on the two running rails (12), and the first connecting rod (21) and the second connecting rod (22) are respectively connected to the impact wheel (16) through a connecting rod mechanism; A shifting member (8) is fixed below the linear motion mechanism. The shifting member (8) is located between the first connecting rod (21) and the second connecting rod (22), and a shifting hole corresponding to the first connecting rod (21) and the second connecting rod (22) is provided on the shifting member (8). The length of the shifting member (8) is smaller than the distance between the first connecting rod (21) and the second connecting rod (22), so that the shifting member (8) only contacts one of the first connecting rod (21) and the second connecting rod (22).

2. The impact rolling model test device according to claim 1, characterized in that: A first wheel (10) and a second wheel (11) are respectively run on each of the running rails (12); the first connecting rod (21) is fixed between the two first wheels (10); and the second connecting rod (22) is fixed between the two second wheels (11).

3. The impact rolling model test device according to claim 2, characterized in that: The first wheel (10) and the second wheel (11) are both grooved track wheels, and the first wheel (10) and the second wheel (11) comprise an inverted U-shaped wheel seat (17), a small shaft rotatably connected to the inverted U-shaped wheel seat (17), and a wheel body fixed to the small shaft; the walking rail (12) passes through the inverted U-shaped wheel seat (17).

4. The impact rolling model test device according to claim 1, characterized in that: The two connecting rod mechanisms are U-shaped as a whole.

5. The impact rolling model test device according to claim 4, characterized in that: The connecting rod mechanism comprises a first connecting rod (13) and a second connecting rod (14), wherein the upper end of the first connecting rod (13) is fixed to a first connecting rod (21) or a second connecting rod (22), the lower end of the first connecting rod (13) is hinged to the upper end of the second connecting rod (14), and the lower end of the second connecting rod (22) is fixed to the end of the wheel axle (20) of the impact wheel (16).

6. The impact rolling model test device according to claim 5, characterized in that: A buffer mechanism (15) is hinged between the first connecting rod (13) and the second connecting rod (14).

7. The impact rolling model test device according to claim 1, characterized in that: The puller (8) is in an I-shape or a TU-shape.

8. The impact rolling model test device according to claim 1, characterized in that: The first connecting rod (21) and the second connecting rod (22) have the same size; the height of the shifting hole is 1.01-1.3 times the size of the first connecting rod (21).

9. The impact rolling model test device according to claim 1, characterized in that: The linear motion mechanism adopts a ball screw slide (7), and the shifting member (8) is fixed on the slide (7) of the ball screw slide (7).

10. The impact rolling model test device according to claim 1, characterized in that: Support platforms (2) are provided at both ends of the length of the model box (1), and both ends of the linear motion mechanism and the running rail (12) are fixed on the support platform (2) via a stand (3).

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