A wheeled engineering machine test track

Abstract

The utility model belongs to the field of test runways, concretely is a kind of wheeled engineering machinery test runway, including multiple runway units, each runway unit includes base layer and surface course;Base layer is successively constituted by graded broken stone layer and cement stabilized broken stone layer, and the surface course of multiple runway units is respectively pebble pavement layer, washboard pavement layer, belgium pavement layer, wave pavement layer, fish scale pit pavement layer and graded gravel pavement layer.The utility model is provided with multiple typical pavement working conditions such as pebble road, washboard road, belgium road, wave road, fish scale pit road and graded broken stone road, and the running stability, power performance, damping performance and electrical system of wheeled engineering machinery complete machine can be comprehensively tested in the same site, real simulation complex road condition under operating state can be found engineering machinery potential problem in test run link, to optimize complete machine design, improve the quality of complete machine of factory, reduce later maintenance and repair cost.

Description

Technical Field

[0001] This utility model belongs to the field of test track technology, and in particular relates to a test track for wheeled engineering machinery. Background Technology

[0002] Wheeled construction machinery typically undergoes a testing phase before leaving the factory to test the overall stability, power, shock absorption, and electrical systems. However, existing test tracks often lack diversity and struggle to simulate complex and varied real-world working conditions, resulting in incomplete test results. Furthermore, the loads on construction vehicles far exceed those of ordinary passenger cars, and existing test tracks lack specificity in material strength and structural design, failing to meet the testing requirements of construction machinery vehicles.

[0003] Therefore, there is an urgent need for a test track for engineering vehicles that can withstand high loads and integrate various typical road conditions, so as to achieve comprehensive testing of the overall performance of the machine in the same site, thereby improving the quality of the machine and reducing the cost of maintenance. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a test track for wheeled engineering machinery, aiming to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the embodiments of this application provide the following technical solutions.

[0006] A test track for wheeled engineering machinery includes multiple track units, each of which includes a base layer and a surface layer, with an elastic buffer composite layer between the base layer and the surface layer. The elastic buffer composite layer is formed by a composite of interleaved geogrids and closed-cell polyurethane elastic pads. Both sides of the surface layer of each track unit are provided with curb stones made of C30 concrete. The base layer is composed of a graded crushed stone layer and a cement-stabilized crushed stone layer in sequence, and the surface layers of the multiple track units are respectively a pebble pavement layer, a corrugated pavement layer, a Belgian pavement layer, a corrugated pavement layer, a fish-scale pit pavement layer, and a graded gravel pavement layer.

[0007] Furthermore, the pebble pavement layer is formed by laying pebbles on a concrete layer; The corrugated pavement layer consists of a corrugated concrete panel and regularly arranged independent wavy protrusions formed thereon by concrete pouring. The Belgian pavement layer consists of Belgian concrete panels, cast-in-place concrete layers, and stones, with the stones embedded in the cast-in-place concrete layers at set intervals and elevation requirements. The corrugated pavement layer consists of a corrugated concrete panel and a continuous wave-shaped structure formed by concrete pouring. The fish-scale pit pavement layer is formed by pressing circular pits onto the surface of the fish-scale pit pavement concrete panel. The graded gravel pavement layer is formed by filling a concrete pool with a mixture of gravel of different particle sizes and then spreading and leveling it.

[0008] Furthermore, the concrete layer of the pebble pavement layer is 30cm thick C30 concrete, the pebble size of the pebble pavement layer is 4.5-8cm, protruding 1-4cm from the ground, and 40-60 pebbles are laid per square meter.

[0009] Furthermore, the corrugated concrete panel of the corrugated pavement layer is 30cm thick C30 concrete, and the wavy protrusions on the corrugated concrete panel are sinusoidal waves with a wave height of 2.5cm, a wavelength of 30cm, a straight section length of 30cm, and a top wave pitch of 60cm.

[0010] Furthermore, the stones of the Belgian pavement layer are rectangular in shape, 22.5-25.5cm long, 12-13cm wide, and 16cm high, and are embedded in a 24cm thick C30 cast-in-place concrete layer, which is located on the surface of a 26cm thick Belgian pavement concrete panel made of C30 concrete.

[0011] Furthermore, the corrugated concrete panel of the corrugated pavement layer is 30cm thick C30 concrete, and the wave structure of the corrugated pavement is a sine wave with a wave height of 90±4mm, a wavelength of 7000mm, and a wave distance of 7000mm.

[0012] Furthermore, the fish-scale pit pavement layer has a 30cm thick C30 concrete panel, and the circular pits in the fish-scale pit pavement layer have a diameter of 60-90cm and a depth of 3-20cm, with the circular pits arranged randomly in an alternating pattern.

[0013] Furthermore, the concrete pool wall of the graded gravel pavement layer is 17cm thick and is made of C30 concrete. The gravel mixture filled in the graded gravel pavement layer is composed of sand and crushed stone in a mass ratio of 10.11:4.97 and has a thickness of 13cm.

[0014] Furthermore, the thickness of the graded crushed stone layer of each runway unit base layer 1 is 16cm, and the thickness of the cement-stabilized crushed stone layer of base layer 1 is 36cm.

[0015] Furthermore, the geogrid in the elastic buffer composite layer is made of polypropylene with a tensile modulus of 75 kN / m, and is laid in a crisscross pattern and fixed with U-shaped nails; the closed-cell polyurethane elastic pad has a thickness of 30 mm and a density of 150 kg / m³. 3 The compression deformation is 35%.

[0016] Compared with existing technologies, the beneficial effects of this utility model of a test track for wheeled engineering machinery are: This utility model sets up various typical road conditions such as cobblestone roads, washboard roads, Belgian roads, corrugated roads, fish-scale pit roads, and graded crushed stone roads, so that the test track can comprehensively test the driving stability, power performance, shock absorption performance, and electrical system of the wheeled construction machinery in the same site. It realistically simulates the operating state under complex road conditions, and can discover potential problems of construction machinery during the test run, thereby optimizing product structure, improving the quality of the finished machine, and reducing the later maintenance costs. This invention adds an elastic buffer composite layer between the surface layer and the base layer of each road structure, giving the road surface controlled elastic characteristics. When subjected to load, the composite layer can effectively absorb high-frequency impacts and disperse concentrated stress, preventing fatigue cracking of the base layer and extending the service life of the runway. At the same time, it does not affect the overall rigidity and driving stability of the upper concrete surface layer, ensuring the structural safety and testing accuracy of large-tonnage engineering machinery during test runs, thereby significantly improving the durability and reliability of the test runway. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0018] In the attached diagram: Figure 1 This is a cross-sectional schematic diagram of the overall structure of the cobblestone road of the test track for wheeled engineering machinery according to this utility model. Figure 2 This is a top view schematic diagram of the pebble pavement layer structure of a test track for wheeled engineering machinery according to this utility model. Figure 3 This is a top view schematic diagram of the corrugated pavement layer structure of a test track for wheeled engineering machinery according to this utility model. Figure 4 This is a longitudinal cross-sectional schematic diagram of the corrugated pavement layer structure of a test track for wheeled engineering machinery according to the present invention. Figure 5 This is a top view schematic diagram of the Belgian pavement layer structure of a test track for wheeled engineering machinery according to this utility model. Figure 6 This is a schematic cross-sectional view of the Belgian pavement layer structure of a test track for wheeled engineering machinery according to this utility model. Figure 7 This is a longitudinal cross-sectional schematic diagram of the corrugated surface layer structure of a test track for wheeled engineering machinery according to this utility model. Figure 8 This is a top view schematic diagram of the fish-scale pit pavement layer structure of a test track for wheeled engineering machinery according to this utility model. Figure 9This is a schematic cross-sectional view of the fish-scale pit pavement layer structure of a test track for wheeled engineering machinery according to this utility model. Figure 10 This is a cross-sectional schematic diagram of the graded crushed stone pavement layer structure of a test track for wheeled engineering machinery according to this utility model. Figure 11 This is a schematic diagram of the elastic buffer composite layer of a test track for wheeled engineering machinery according to this utility model.

[0019] The attached figures are labeled as follows: 1. Base course; 11. Graded crushed stone layer; 12. Cement-stabilized crushed stone layer; 2. Curbstone; 3. Pebble pavement layer; 31. Concrete layer; 32. Pebble pavement; 4. Corrugated pavement layer; 41. Corrugated pavement concrete panel; 42. Corrugated protrusions; 5. Belgian pavement layer; 51. Belgian road concrete slab; 52. Cast-in-place concrete layer; 53. Stone blocks; 6. Corrugated pavement layer; 61. Corrugated concrete pavement panel; 62. Wave-shaped structure; 7. Fish-scale pothole pavement layer; 71. Fish-scale pothole concrete slab; 72. Circular pothole; 8. Graded gravel pavement layer; 81. Concrete pool; 82. Gravel mixture; 9. Elastic buffer composite layer; 91. Geogrid; 92. Closed-cell polyurethane elastic pad. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0022] Please refer to Figures 1-10 In one embodiment of this utility model, a test track for wheeled engineering machinery is provided, including multiple track units; each track unit includes a base layer 1 and a surface layer, and both sides of the surface layer of each track unit are provided with curb stones 2 made of C30 concrete to define the road surface boundary and improve the overall structural stability. In one implementation, an elastic buffer composite layer 9 is also provided between the base layer 1 and the surface layer in this embodiment. The elastic buffer composite layer 9 is formed by a combination of interleaved geogrid 91 and closed-cell polyurethane elastic pad 92, which is used to absorb vehicle wheel impact, constrain the lateral displacement of the surface layer and relieve stress concentration, thereby improving the durability and structural stability of the test track under heavy load and repeated impact conditions. Therefore, this utility model provides a structural layer with buffering and energy dissipation functions, namely an elastic buffer composite layer 9, between the surface layer and the base layer 1, so as to disperse impact energy and delay structural fatigue while ensuring mechanical strength, thereby improving the reliability of test results and the durability of the track, and meeting the requirements of factory testing of engineering machinery.

[0023] The base layer 1 is composed of a graded crushed stone layer 11 and a cement-stabilized crushed stone layer 12 in sequence, and the surface layers of the multiple runway units are respectively a pebble pavement layer 3, a corrugated pavement layer 4, a Belgian pavement layer 5, a corrugated pavement layer 6, a fish scale pit pavement layer 7, and a graded gravel pavement layer 8. Specifically, in this embodiment of the utility model, the pebble pavement layer 3 is formed by laying pebbles 32 on a concrete layer 31; Specifically, in this embodiment of the utility model, the washboard pavement layer 4 is composed of a washboard pavement concrete panel 41 and regularly arranged independent wavy protrusions 42 formed thereon by concrete pouring. Specifically, in this embodiment of the utility model, the Belgian pavement layer 5 is composed of a Belgian pavement concrete panel 51, a cast-in-place concrete layer 52 and stones 53, with the stones embedded in the cast-in-place concrete layer 52 according to the set spacing and elevation requirements. Specifically, in this embodiment of the utility model, the corrugated pavement layer 6 is composed of a corrugated concrete panel 61 and a continuous wave-shaped structure 62 formed by concrete pouring. The fish-scale pit pavement layer 7 is formed by pressing circular pits 72 onto the surface of the fish-scale pit pavement concrete panel 71. The graded gravel pavement layer 8 is formed by filling a concrete pool 81 with a mixture of gravel with different particle sizes 82 and then spreading and leveling it.

[0024] In this embodiment, the concrete layer 31 of the pebble pavement layer 3 is 30cm thick C30 concrete, which serves as the load-bearing foundation. The cobblestone pavement layer has cobblestones with a diameter of 4.5 to 8 cm, protruding 1 to 4 cm above the ground. Each square meter of the cobblestone pavement layer contains 40 to 60 cobblestones to form an uneven driving surface, which can effectively simulate the vibration conditions of natural cobblestone pavement.

[0025] Furthermore, in this embodiment, the washboard pavement layer 4 is composed of a washboard concrete panel 41 and corrugated protrusions 42 disposed thereon. The washboard concrete panel 41 of the washboard pavement layer 4 is a 30cm thick C30 concrete as the load-bearing substrate. The corrugated protrusions 42 on the washboard concrete panel adopt a sinusoidal waveform with a wave height of 2.5cm, a wavelength of 30cm, a straight section length of 30cm, and a top wave pitch of 60cm. The washboard pavement layer 4 provided in this embodiment can simulate the periodic impact and vibration generated by vehicles on the washboard pavement, and test the reliability of the suspension system and transmission system.

[0026] In this embodiment, the Belgian pavement layer 5 consists of a Belgian pavement concrete panel 51, a cast-in-place concrete layer 52, and stones 53 embedded thereon. The Belgian pavement concrete panel 51 is 26cm thick C30 concrete, with a 24cm thick cast-in-place C30 concrete layer on top. The stones of the Belgian pavement layer 5 provided in this embodiment are cuboid structures, 22.5-25.5cm long, 12-13cm wide, and 16cm high, and are embedded in the 24cm thick C30 cast-in-place concrete layer 52. The cast-in-place concrete layer is located on the surface of the 26cm thick Belgian pavement concrete panel 51, which is made of C30 concrete. In this embodiment, stones 53 are embedded in the cast-in-place concrete layer 52. The height difference between the front and back of the stones is 2 to 2.5 cm, and the gap between the stones is 25 ± 5 mm. The gaps are filled with cement mortar. Through the arrangement and embedding of the stones, a typical Belgian stone road is formed, which can simulate the test of the stability of the suspension, frame and body during long-term use.

[0027] Furthermore, in this embodiment, the corrugated pavement layer 6 is composed of a corrugated concrete panel 61 and a wave-shaped structure 62. The corrugated concrete panel 61 of the corrugated pavement layer 6 is 30cm thick C30 concrete, and the wave-shaped structure 62 of the corrugated pavement has a sine wave with a wave height of 90±4mm, a wavelength of 7000mm, and a wave pitch of 7000mm. The continuous corrugated pavement provided in this embodiment is used to simulate the force changes and dynamic response of a vehicle when driving on uneven terrain, and to test the power transmission and stability of the whole vehicle.

[0028] Furthermore, in this embodiment of the present invention, the fish-scale pit pavement layer 7 is composed of a fish-scale pit concrete panel 71 and circular pits 72 distributed thereon. The fish-scale pit concrete panel 71 of the fish-scale pit pavement layer 7 is 30cm thick C30 concrete. The diameter of the circular pits 72 of the fish-scale pit pavement layer is 60-90cm and the pit depth is 3-20cm. The circular pits are randomly arranged in an alternating pattern. This pavement can simulate the complex impact conditions of natural pothole road sections and examine the vehicle's passability and structural impact resistance on irregular ground.

[0029] Furthermore, in this embodiment, the graded gravel pavement layer 8 consists of a concrete pool 81 and a gravel mixture 82 filled therein. The concrete pool 81 of the graded gravel pavement layer 8 has a wall thickness of 17cm and is cast from C30 concrete. The gravel mixture 82 filling the graded gravel pavement layer is composed of sand and crushed stone in a mass ratio of 10.11:4.97, with a thickness of 13cm. The pool is filled with a 13cm thick gravel mixture, which consists of sand and crushed stone with a particle size of 0-5mm in a mass ratio of 10.11:4.97, and is formed after paving and leveling. This pavement simulates the driving conditions of a loose granular pavement, facilitating the testing of vehicle driving performance, passability, and wheel slippage.

[0030] In this embodiment, the thickness of the graded crushed stone layer 11 of the base layer 1 of each runway unit is 16cm, and the thickness of the cement-stabilized crushed stone layer 12 of the base layer 1 is 36cm; the base structure ensures the strength and stability of the overall road surface and can withstand the high load of wheeled engineering machinery.

[0031] Furthermore, such as Figure 11 As shown, the geogrid 91 in the elastic buffer composite layer 9 provided in this embodiment is made of polypropylene with a tensile modulus of 75 kN / m. It is laid in a crisscross pattern and fixed with U-shaped nails. The closed-cell polyurethane elastic pad (92) has a thickness of 30 mm and a density of 150 kg / m³. 3 The compression deformation is 35%; the elastic buffer composite layer 9 in this embodiment can effectively absorb impact energy when a vehicle passes by, reduce the peak stress of the base layer, thereby extending the overall service life of the runway and improving the consistency of test data.

[0032] It can be seen that by introducing an elastic buffer composite layer 9 into the structural design, this utility model can not only meet the high load test requirements of large-tonnage engineering machinery, but also effectively disperse wheel load impact, reduce fatigue damage to the base layer, and improve the overall service life of the test track and the stability of test data.

[0033] In summary, the test track described in this invention can integrate various typical road conditions within the same site, comprehensively testing the driving stability, shock absorption performance, power performance, and electrical system of wheeled construction machinery. It is particularly suitable for performance testing of construction vehicles under heavy load conditions. This track can expose potential problems in advance, improve the overall quality of the machine before it leaves the factory, and effectively reduce subsequent maintenance and repair costs.

[0034] The above solutions are merely illustrative examples of preferred embodiments, but are not limited thereto. When implementing this invention, appropriate substitutions and / or modifications can be made according to the user's needs.

[0035] The number of devices and processing scale described herein are for the purpose of simplifying the description of this utility model. Applications, modifications, and variations of this utility model will be readily apparent to those skilled in the art.

[0036] Although embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for this utility model. Other modifications can be readily implemented by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and examples shown and described herein.

Claims

1. A test track for wheeled engineering machinery, characterized in that, Includes multiple runway units; Each runway unit includes a base layer (1) and a surface layer. An elastic buffer composite layer (9) is also provided between the base layer (1) and the surface layer. The elastic buffer composite layer (9) is formed by interlaced geogrids (91) and closed-cell polyurethane elastic pads (92). Curb stones (2) made of C30 concrete are provided on both sides of the surface layer of each runway unit. The base layer (1) is composed of a graded crushed stone layer (11) and a cement-stabilized crushed stone layer (12) in sequence. The surface layers of multiple runway units are respectively a pebble pavement layer (3), a corrugated pavement layer (4), a Belgian pavement layer (5), a corrugated pavement layer (6), a fish scale pit pavement layer (7), and a graded gravel pavement layer (8).

2. The test track for wheeled engineering machinery according to claim 1, characterized in that, The pebble pavement layer (3) is formed by laying pebbles (32) on a concrete layer (31); the corrugated pavement layer (4) consists of a corrugated pavement concrete panel (41) and regularly arranged independent wavy protrusions (42) formed by concrete pouring on it; the Belgian pavement layer (5) consists of a Belgian pavement concrete panel (51), a cast-in-place concrete layer (52) and stones (53), with the stones embedded in the cast-in-place concrete layer (52) according to the set spacing and elevation requirements; the corrugated pavement layer (6) consists of a corrugated pavement concrete panel (61) and a continuous wavy structure (62) formed by concrete pouring; the fish-scale pit pavement layer (7) is formed by pressing circular pits (72) on the surface of the fish-scale pit pavement concrete panel (71); the graded gravel pavement layer (8) is formed by filling a concrete pool (81) with gravel mixture (82) of different particle sizes and spreading and leveling it.

3. The test track for wheeled engineering machinery according to claim 2, characterized in that, The concrete layer (31) of the pebble pavement layer (3) is 30cm thick C30 concrete, and the pebble (32) of the pebble pavement layer has a particle size of 4.5 to 8cm, protruding 1 to 4cm above the ground, with 40 to 60 pebbles laid per square meter.

4. The test track for wheeled engineering machinery according to claim 3, characterized in that, The corrugated concrete panel (41) of the corrugated pavement layer (4) is 30cm thick C30 concrete. The wavy protrusions (42) on the corrugated concrete panel are sinusoidal waves with a wave height of 2.5cm, a wavelength of 30cm, a straight section length of 30cm, and a top wave distance of 60cm.

5. The test track for wheeled engineering machinery according to claim 4, characterized in that, The stones of the Belgian pavement layer (5) are rectangular in shape, 22.5-25.5 cm long, 12-13 cm wide, and 16 cm high, and are embedded on a 24 cm thick C30 cast-in-place concrete layer (52), which is located on the surface of a 26 cm thick Belgian pavement concrete panel (51) made of C30 concrete.

6. The test track for wheeled engineering machinery according to claim 5, characterized in that, The corrugated concrete panel (61) of the corrugated pavement layer (6) is 30cm thick C30 concrete, and the wave structure (62) of the corrugated pavement is a sine wave with a wave height of 90±4mm, a wavelength of 7000mm, and a wave distance of 7000mm.

7. The test track for wheeled engineering machinery according to claim 6, characterized in that, The fish-scale pit pavement layer (7) has a fish-scale road concrete panel (71) with a thickness of 30cm and a C30 concrete. The circular pits (72) of the fish-scale pit pavement layer have a diameter of 60-90cm and a depth of 3-20cm. The circular pits are arranged randomly in an alternating pattern.

8. The test track for wheeled engineering machinery according to any one of claims 3 to 7, characterized in that, The thickness of the graded crushed stone layer (11) of each runway unit base (1) is 16cm, and the thickness of the cement-stabilized crushed stone layer (12) of the base (1) is 36cm.

9. The test track for wheeled engineering machinery according to claim 8, characterized in that, The geogrid (91) in the elastic buffer composite layer (9) is made of polypropylene with a tensile modulus of 75kN / m. It is laid in a crisscross pattern and fixed with U-shaped nails. The closed-cell polyurethane elastic pad (92) has a thickness of 30mm, a density of 150kg / m³, and a compression deformation of 35%.

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