Mobile chassis and roadbed performance detection device

Abstract

The utility model provides a mobile chassis and a roadbed performance detection device, and relates to the technical field of investigation equipment. The movable chassis has the height direction and comprises a frame, a pair of walking mechanisms and at least one walking switching mechanism, the pair of walking mechanisms are arranged on the frame, and the walking mechanisms are provided with grounding parts used for making contact with the road surface; in the pair of walking mechanisms, one walking mechanism is a wheel type walking mechanism, and the other walking mechanism is a crawler type walking mechanism; the at least one walking switching mechanism is arranged on the frame, at least one of the pair of walking mechanisms is connected with the walking switching mechanism, the walking switching mechanism is used for adjusting the position of the grounding part of the corresponding walking mechanism in the height direction, and at least the grounding part of the pair of walking mechanisms can be switched between the state of being separated from the road surface and the state of abutting against the road surface. The method has good terrain trafficability, and also can reduce the damage influence on the paved pavement.

Description

Technical Field

[0001] This application relates to the field of survey equipment technology, and in particular to a mobile chassis and roadbed performance testing device. Background Technology

[0002] The determination of the bearing capacity of highway subgrade mainly relies on shear data obtained during the survey phase, and is mostly based on indoor direct shear tests and triaxial tests to determine the bearing capacity of the extracted samples. However, the working conditions of indoor shear tests do not match those on-site, and obviously, relying on test results to guide on-site construction often has certain limitations. To improve construction quality, wheeled or tracked highway inspection vehicles are mostly used to conduct the above-mentioned tests on the subgrade at the construction site. However, the following problems still exist: wheeled highway inspection vehicles have poor road condition adaptability, while tracked highway inspection vehicles, although highly adaptable to road conditions, can damage the paved road surface during travel. Utility Model Content

[0003] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide a mobile chassis and roadbed performance testing device that has good terrain passability and can also reduce the damage to the paved road surface.

[0004] This application provides the following technical solution:

[0005] This application embodiment provides a mobile chassis, the mobile chassis having a height direction, the mobile chassis comprising:

[0006] Frame;

[0007] A pair of traveling mechanisms, the pair of traveling mechanisms being disposed on the vehicle frame, the traveling mechanisms having a grounding portion for contacting the road surface; in the pair of traveling mechanisms, one of the traveling mechanisms is a wheeled traveling mechanism and the other is a tracked traveling mechanism;

[0008] At least one travel switching mechanism is provided on the vehicle frame, and at least one of the pair of travel mechanisms is connected to the travel switching mechanism. The travel switching mechanism is used to adjust the position of the grounding part of the corresponding travel mechanism in the height direction, so as to enable the grounding part of the pair of travel mechanisms to switch between a state away from the road surface and a state in contact with the road surface.

[0009] In some embodiments of the first aspect, the wheeled walking mechanism is connected to the walking switching mechanism, and the wheeled walking mechanism has walking wheels;

[0010] The walking switching mechanism includes:

[0011] A guide rail is provided on the vehicle frame and extends along the height direction;

[0012] A wheel seat, wherein the wheel seat and the guide rail are slidably connected, and the traveling wheel is rotatably mounted on the wheel seat;

[0013] A drive unit is disposed on the frame and connected to the wheel seat. The drive unit is used to drive the wheel seat to move along the extension direction of the guide rail.

[0014] In some embodiments of the first aspect, only the wheeled walking mechanism is connected to the walking switching mechanism, and the tracked walking mechanism has a drive sprocket and a track;

[0015] The mobile chassis also includes a power mechanism and a drive shaft. The power mechanism is mounted on the frame and connected to the drive shaft. The power mechanism is used to drive the drive shaft to rotate. The drive shaft is connected to the drive sprocket. When the wheeled walking mechanism is in the road contact state, the walking wheels are in contact with the road surface, the tracks are detached from the road surface, and one end of the drive shaft is detachably connected to the walking wheels.

[0016] In some embodiments of the first aspect, when the wheeled walking mechanism is in the contact with the road surface state, the walking wheel and the drive shaft are coaxial, and one end of the drive shaft is detachably connected to the walking wheel.

[0017] Secondly, this application also provides a roadbed performance testing device, the roadbed performance testing device comprising:

[0018] A mobile chassis, wherein the mobile chassis is as described in any of the above embodiments;

[0019] A shear testing system, wherein the shear testing system is mounted on the frame of the mobile chassis;

[0020] The probing system includes at least one of the following: a static probing system and a dynamic probing system, wherein the probing system is disposed on the frame of the mobile chassis.

[0021] In some embodiments of the second aspect, the shearing test system includes a drive mechanism, a shearing rod, and a cross-shaped shearing plate. The drive mechanism is connected to one end of the shearing rod, and the other end of the shearing rod is connected to the cross-shaped shearing plate. The drive mechanism is used to drive the shearing rod to rotate, so that the cross-shaped shearing plate performs a rotational shearing action.

[0022] In some embodiments of the second aspect, the shear test system further includes a grooving mechanism disposed on the frame for grooving the road surface.

[0023] In some embodiments of the second aspect, the roadbed performance testing device further includes an excavation system for excavating the road surface.

[0024] In some embodiments of the second aspect, the excavation system includes a shovel and a lifting mechanism, the lifting mechanism being disposed on the frame and connected to the shovel, the lifting mechanism being used to drive the shovel away from or towards the road surface.

[0025] In some embodiments of the second aspect, the digging system further includes at least one grooving cutter having a tip facing the lower end of the shovel plate, and the grooving cutter being movably disposed on the shovel plate, the grooving cutter having a component in the height direction, such that the tip can switch between a state below the lower end of the shovel plate and a state not below the lower end of the shovel plate.

[0026] The embodiments of this application have the following advantages:

[0027] This application provides a mobile chassis with a walking switching mechanism that can adjust the height of the ground contact point of the selected walking mechanism relative to the ground, realizing the transition from a state detached from the road surface (i.e., suspended) to a state in contact with the road surface (i.e., touching the ground and bearing weight). In other words, the mobile chassis has two working states. One working state is the walking state, where the ground contact point of the wheeled walking mechanism is in contact with the ground, and the tracked walking mechanism is detached and raised above the ground to support the entire mobile chassis. This state can be used when moving inspection points, eliminating the need for a transport vehicle. The other working state is the surveying state, where the ground contact point of the wheeled walking mechanism is detached and raised above the ground, and the tracked walking mechanism is in contact with the ground to support the entire mobile chassis. This state can be used during surveying.

[0028] Of course, in other embodiments, the wheeled walking mechanism and the tracked walking mechanism are respectively connected to a walking switching mechanism, which can control the wheeled walking mechanism and the tracked walking mechanism separately.

[0029] Clearly, when vehicles need to traverse complex terrain or conduct surveys, tracked vehicles can be used to provide enhanced mobility and vehicle stability; while when protecting existing roads, wheeled vehicles can be switched to, such as during relocation. This not only improves vehicle mobility but also reduces potential damage to existing facilities, thereby enhancing work efficiency and quality.

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This illustration shows a schematic diagram of the structure of a roadbed performance testing device provided in an embodiment of this application from one perspective.

[0033] Figure 2 A simplified structural diagram of a walking switching mechanism provided in an embodiment of this application is shown;

[0034] Figure 3 A simplified structural diagram of a shear testing system provided in an embodiment of this application is shown;

[0035] Figure 4 A simplified structural diagram of a mining system provided by an embodiment of this application is shown.

[0036] Explanation of key component symbols:

[0037] 100-Chassis; 200-Crawler-type walking mechanism; 210-Drive sprocket; 220-Crawler; 300-Walking wheel; 400-Excavating system; 410-Shovel; 420-Slotting cutter; 430-Lifting mechanism; 440-Fixed support; 500-Penetration system; 600-Shearing test system; 610-Slotting mechanism; 620-Drive mechanism; 630-Shearing rod; 640-Cross shear plate; 700-Power mechanism; 800-Anchoring system; 900-Radar system; 1000-Positioner; 1100-Data acquisition and control system; 1200-Walking switching mechanism; 1210-Wheel seat; 1220-Guide rail; 1230-Drive component. Detailed Implementation

[0038] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0039] It should be noted that when an element is said to be "fixed" to another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly" on another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the template description is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] In related technologies, the determination of the bearing capacity of highway subgrades mainly relies on shear data obtained during the survey phase, and is mostly achieved through indoor direct shear tests and triaxial tests on extracted samples. However, the working conditions of indoor shear tests do not match those on-site, and obviously, guiding on-site construction based on test results often has certain limitations. To improve construction quality, wheeled or tracked highway inspection vehicles are mostly used to conduct the aforementioned tests on the subgrade at the construction site. However, the following problems still exist: wheeled highway inspection vehicles have poor road condition adaptability, while tracked highway inspection vehicles, although highly adaptable, can damage the paved road surface during travel. Therefore, how to achieve a highway inspection vehicle that has both good passability and minimizes damage to the paved road surface is a technical problem that urgently needs to be solved by those skilled in the art.

[0044] As shown in Figure 1 and Figure 2 As shown, in order to solve the above-mentioned technical problems, this application provides a mobile chassis with a height direction. The mobile chassis includes a frame 100, a pair of walking mechanisms and at least one walking switching mechanism 1200. The pair of walking mechanisms are disposed on the frame 100 and have a grounding part for contacting the road surface. In the pair of walking mechanisms, one of the walking mechanisms is a wheeled walking mechanism and the other is a tracked walking mechanism 200.

[0045] At least one travel switching mechanism 1200 is disposed on the frame 100. At least one of the pair of travel mechanisms is connected to the travel switching mechanism 1200. The travel switching mechanism 1200 is used to adjust the position of the grounding part of the corresponding travel mechanism in the height direction, so that at least the grounding part of the pair of travel mechanisms can switch between the state of being off the road surface and the state of being in contact with the road surface.

[0046] In these embodiments, the application provides an innovative mobile chassis for use in highway inspection vehicles or other similar applications, with strong road surface compatibility. Clearly, this mobile chassis can flexibly switch between wheeled and tracked modes to adapt to different terrain conditions and reduce damage to paved roads.

[0047] Generally, the height direction of a mobile chassis refers to the direction perpendicular to the ground, i.e., the vertical direction. However, when the mobile chassis is tilted, the height direction can also be interpreted as the direction perpendicular to the chassis.

[0048] The frame 100 is the supporting framework for the entire system, upon which all other components are mounted. It needs to be strong enough to withstand the weight of the vehicle itself, additional equipment, and various loads that may be encountered during operation.

[0049] There are two traveling mechanisms: one wheeled and one tracked. These are different types of traveling mechanisms. However, each traveling mechanism has a ground contact point, which is the part that directly contacts the ground. For the wheeled traveling mechanism, the ground contact point is the wheel 300, with its underside in contact with the ground. For the tracked traveling mechanism 200, the ground contact point is the track 220, with its underside in contact with the ground.

[0050] It should be noted that the wheeled walking mechanism is suitable for flat and hard surfaces, such as paved roads, because the walking wheels 300 are made of rubber and are elastic, causing less damage to these paved road surfaces.

[0051] The tracked walking mechanism 200 is more suitable for uneven or soft ground, such as unpaved roadbeds or muddy, gravelly terrain, because the track 220 has a smaller distributed pressure and is less likely to sink into or damage the ground.

[0052] The number of walking switching mechanisms 1200 is at least one, meaning that the number of walking switching mechanisms 1200 can also be two. In this embodiment, the number of walking switching mechanisms 1200 is one. The walking switching mechanism 1200 allows the operator to determine whether the corresponding walking mechanism is in contact with the ground. Specifically, the walking switching mechanism 1200 can adjust the height position of the ground contact part of the selected walking mechanism relative to the ground, realizing the conversion between the state of being off the road surface (i.e., suspended) and the state of being in contact with the road surface (i.e., in contact with the ground and bearing weight). That is to say, the mobile chassis has two working states. One working state is the walking state, in which the ground contact part of the wheeled walking mechanism is in contact with the ground, and the tracked walking mechanism 200 is off the ground and above the ground to support the entire mobile chassis. This state can be used when transferring detection points, eliminating the need for a transfer vehicle. The other working state is the surveying state, in which the ground contact part of the wheeled walking mechanism is off the ground and above the ground, and the tracked walking mechanism 200 is in contact with the ground to support the entire mobile chassis. This state can be used during surveying.

[0053] Of course, in other embodiments, the wheeled walking mechanism and the tracked walking mechanism 200 are respectively connected to the walking switching mechanism 1200, which can control the wheeled walking mechanism and the tracked walking mechanism 200 independently.

[0054] For example, in some special cases, it is possible to control both the wheeled walking mechanism and the tracked walking mechanism 200 to contact the ground simultaneously, thereby further increasing the ground contact area.

[0055] Clearly, when the vehicle needs to traverse complex terrain or conduct surveys, it can choose to use the tracked 220 type of running gear, providing enhanced mobility and vehicle stability; while when protecting existing roads, it can switch to wheeled running gear, such as during relocation. This not only improves the vehicle's mobility but also reduces potential damage to existing facilities, thereby improving work efficiency and quality. Furthermore, due to the presence of the running gear switching mechanism 1200, theoretically, multiple types of running gear can be configured on the same vehicle, further enhancing its versatility and adaptability. Such a design is a valuable improvement for vehicles that need to perform tasks under different conditions.

[0056] like Figure 1 and Figure 2 As shown, in some embodiments, the wheeled walking mechanism is connected to a walking switching mechanism 1200, and the wheeled walking mechanism has walking wheels 300.

[0057] The walking switching mechanism 1200 includes a guide rail 1220, a wheel seat 1210, and a drive component 1230. The guide rail 1220 is mounted on the frame 100 and extends along the height direction. The wheel seat 1210 is slidably connected to the guide rail 1220, and the walking wheel 300 is rotatably mounted on the wheel seat 1210. The drive component 1230 is mounted on the frame 100 and connected to the wheel seat 1210. The drive component 1230 is used to drive the wheel seat 1210 to move along the extension direction of the guide rail 1220.

[0058] In these embodiments, the wheeled running gear is connected to the frame 100 via a running gear switching mechanism 1200, enabling height adjustment of the wheeled running gear. This allows the vehicle to selectively use either the wheeled or tracked running gear 200 as needed, adapting to different ground conditions and protecting paved roads.

[0059] Among them, the wheeled walking mechanism has walking wheels 300, which are the main components of the wheeled walking mechanism and are responsible for providing efficient and low-damage mobility on flat and hard surfaces.

[0060] For example, the travel wheel 300 is a rubber wheel. Of course, in other embodiments, the travel wheel 300 may also be a multi-terrain tire, a non-pneumatic elastic tire, or a pneumatic tire, etc.

[0061] The guide rail 1220 is fixedly mounted on the frame 100 and extends along the height direction (i.e., the vertical direction). The function of the guide rail 1220 is to provide a fixed sliding path for the wheel seat 1210, ensuring that the wheeled running mechanism can rise or fall smoothly.

[0062] The wheel seat 1210 is slidably connected to the guide rail 1220, and can move along the length of the guide rail 1220. The traveling wheel 300 is mounted on this wheel seat 1210, so as the wheel seat 1210 moves, the traveling wheel 300 also rises or falls accordingly.

[0063] The drive unit 1230 is also fixed to the frame 100. The drive unit 1230 is connected to the wheel seat 1210 and is powered by mechanical transmission or other means, such as an electric motor or hydraulic cylinder, so that the wheel seat 1210 can move along the guide rail 1220. The operation of the drive unit 1230 can be manual, electric, or automatically controlled by the control system in response to the operator's selection or specific working mode requirements.

[0064] When wheeled travel is required, the drive unit 1230 actuates, pushing the wheel seat 1210 downwards along the guide rail 1220 until the traveling wheel 300 contacts the ground and bears weight. Conversely, when wheeled travel is not needed (e.g., to switch to tracked travel), the drive unit 1230 pulls the wheel seat 1210 back to its initial position, lifting the traveling wheel 300 off the ground. This design not only improves the vehicle's terrain adaptability and work efficiency but also effectively protects existing road structures. Furthermore, the ability to quickly switch between wheeled and tracked travel mechanisms on the same platform increases the vehicle's versatility and flexibility.

[0065] like Figure 1 As shown, in some embodiments, only the wheeled walking mechanism is connected to the walking switching mechanism 1200, and the tracked walking mechanism 200 has a drive sprocket 210 and a track 220.

[0066] The mobile chassis also includes a power mechanism 700 and a drive shaft. The power mechanism 700 is mounted on the frame 100 and connected to the drive shaft. The power mechanism 700 is used to drive the drive shaft to rotate. The drive shaft is connected to the drive sprocket 210. When the wheeled walking mechanism is in contact with the road surface, the walking wheel 300 is in contact with the road surface, the track 220 is off the road surface, and one end of the drive shaft is detachably connected to the walking wheel 300.

[0067] In these embodiments, the wheeled running gear is connected to the frame 100 via a running gear switching mechanism 1200, while the tracked running gear 200 includes a drive sprocket 210 and tracks 220. Furthermore, the mobile chassis is equipped with a power mechanism 700 and a drive shaft to transmit power to the different running gears.

[0068] The power unit 700 is mounted on the frame 100 and is responsible for providing the driving force for the entire system. It can be an internal combustion engine, an electric motor, or other forms of power source.

[0069] The drive shaft is connected to the power mechanism 700 and can transmit power to the traveling mechanism. Depending on the traveling mode, the drive shaft can be connected to either the wheeled traveling mechanism or the tracked traveling mechanism 200.

[0070] The travel switching mechanism 1200 is connected to the frame 100, allowing its height to be adjusted. This enables the wheeled travel mechanism to switch between a ground-contact state (i.e., in contact with the ground and bearing weight) and a ground-delay state. The tracked travel mechanism 200 includes a drive sprocket 210 and tracks 220, but is not directly connected to the travel switching mechanism 1200. This means that the height of the tracked travel mechanism 200 cannot be dynamically adjusted like that of the wheeled travel mechanism.

[0071] Wheeled travel mode: When wheeled travel is required, the travel switching mechanism 1200 activates, causing the wheels 300 of the wheeled travel mechanism to lower and contact the ground. At this time, the tracks 220 of the tracked travel mechanism 200 will rise and detach from the ground to avoid damaging the paved road surface. One end of the drive shaft can be detachably connected to the wheels 300 to ensure that power can be effectively transmitted to the wheels 300, allowing the vehicle to move using the wheeled travel mechanism.

[0072] For example, the drive shaft and the axle of the traveling wheel 300 are connected by a flange structure. Alternatively, the two are connected by a coupling.

[0073] Tracked 220 walking mode: When encountering complex terrain or unpaved roads, the wheeled walking mechanism can be lifted off the ground via the walking switching mechanism 1200. Simultaneously, since the drive shaft is connected to the drive sprocket 210 of the tracked walking mechanism 200, the mobile chassis possesses tracked 220 walking functionality, allowing for better adaptation to soft or uneven ground conditions. Clearly, the ability to flexibly switch walking modes under different ground conditions improves vehicle passability and reduces potential damage to existing road surfaces. Furthermore, because the drive shaft can be switched according to the currently used walking mechanism, effective power output is ensured regardless of the mode, enhancing the overall performance and reliability of the system.

[0074] It should be noted that in this embodiment, the connection between the drive shaft and the drive sprocket 210 is maintained, meaning the drive sprocket 210 can continue to rotate. Only switching the power transmission state between the drive shaft and the traveling wheel 300 is required. Of course, in other embodiments, the drive sprocket 210 can also be connected to the drive shaft via a clutch. This allows the power transmission between the drive sprocket 210 and the drive wheel to be cut off when the track 220 is off the ground, reducing energy consumption.

[0075] In some embodiments, when the wheeled walking mechanism is in contact with the road surface, the walking wheel 300 and the drive shaft are coaxial, and one end of the drive shaft is detachably connected to the walking wheel 300.

[0076] In these embodiments, when the wheeled walking mechanism is in contact with the road surface, the walking wheel 300 and the drive shaft are coaxially arranged, and one end of the drive shaft can be detachably connected to the walking wheel 300. This design ensures that power can be directly transmitted from the power mechanism 700 to the walking wheel 300 through the drive shaft, while allowing flexible switching between different walking modes.

[0077] The coaxial arrangement of the travel wheel 300 and the drive shaft means that the rotation center line of the travel wheel 300 is completely coincident with the axis of the drive shaft. This arrangement simplifies the power transmission path, reduces energy loss, and improves the system efficiency.

[0078] To achieve the transition from tracked 220-type travel mode to wheeled travel mode, the driveshaft needs to be able to disconnect from the wheels 300 when the wheeled travel mechanism is not in use, and reliably establish a new connection with the wheels 300 when the wheeled travel mechanism is in use. This can be achieved through various mechanical methods, such as: using a quick-connect / disconnect coupling device to complete the connection or disconnection between the driveshaft and the wheels 300 in a short time; or using a clutch to control power transmission, allowing the operator to selectively distribute power to different travel mechanisms; or using a sliding spline or similar structure, allowing the driveshaft to move within a certain range along its axis to facilitate engagement or disengagement with the wheels 300.

[0079] like Figure 1 As shown, in some embodiments, this application also provides a roadbed performance testing device, which includes a mobile chassis, a shear test system 600 and a penetration test system 500, wherein the mobile chassis is any of the mobile chassis described in the above embodiments;

[0080] A shear testing system 600 is installed on the frame 100 of the mobile chassis. The shear testing system 600 is used to test the mechanical properties of the subgrade soil.

[0081] The penetration testing system 500 includes at least one of the following: a static penetration testing system 500 and a dynamic penetration testing system 500. The penetration testing system 500 is mounted on the frame 100 of the mobile chassis. Both the static penetration testing system 500 and the dynamic penetration testing system 500 are used to evaluate the physical and mechanical properties of the subgrade soil.

[0082] In these embodiments, the roadbed performance testing device of this application combines a mobile chassis, a shear test system 600, and a penetration test system 500 (including static penetration test and / or dynamic penetration test), aiming to provide an efficient and multifunctional solution for on-site evaluation of the mechanical properties and physical characteristics of roadbed soil.

[0083] As previously mentioned, the mobile chassis features both a wheeled and a tracked walking mechanism 200, and achieves flexible height adjustment via a walking switching mechanism 1200. This allows the vehicle to move smoothly across different types of ground conditions while minimizing damage to paved surfaces. Height adjustability and good terrain adaptability ensure that the equipment can reach and operate in various complex environments, such as unpaved roads and soft soil areas.

[0084] The shear testing system 600 is mounted on the frame 100 of a mobile chassis and is mainly used for direct shear testing of subgrade soil samples to evaluate their shear strength and other relevant mechanical parameters. It is suitable for situations requiring precise measurement of key indicators such as the internal friction angle and cohesion of the soil, providing a scientific basis for subsequent design and construction.

[0085] The cone penetration test system 500 includes one or a combination of static and dynamic cone penetration tests, depending on the specific requirements. The static cone penetration test system 500 provides continuous and detailed soil information, including cone tip resistance, sidewall friction, and pore water pressure. It is suitable for various soil types, and is particularly representative of saturated soils and soft rocks. The dynamic cone penetration test system 500 is simple to operate and less expensive, making it particularly suitable for fieldwork and preliminary geological surveys. It works effectively even in complex terrain or underwater environments.

[0086] Integrating the shear testing system 600 and the penetration testing system 500 onto the same mobile platform allows for the simultaneous acquisition of multi-dimensional data, providing a comprehensive understanding of the various performance indicators of the subgrade soil. Due to the special design of the mobile chassis, the entire testing device can quickly switch between different working conditions, improving work efficiency and adaptability.

[0087] Furthermore, by combining different types of testing methods, more accurate and reliable results can be obtained, which helps to optimize the engineering decision-making process.

[0088] like Figure 3 As shown, in some embodiments, the shear test system 600 includes a drive mechanism 620, a shear rod 630, and a cross shear plate 640. The drive mechanism 620 is connected to one end of the shear rod 630, and the other end of the shear rod 630 is connected to the cross shear plate 640. The drive mechanism 620 is used to drive the shear rod 630 to rotate, so that the cross shear plate 640 performs a rotational shearing action.

[0089] In these embodiments, the shear testing system 600 includes a drive mechanism 620, a shear bar 630, and a cross-shaped shear plate 640. This design enables rotational shear testing of subgrade soil samples. The drive mechanism 620 provides power to rotate the shear bar 630. The drive mechanism 620 can be an electric motor, a hydraulic motor, or other type of power source. The drive mechanism 620 is connected to one end of the shear bar 630 to ensure that power is effectively transmitted to the shear bar 630.

[0090] The shearing rod 630 acts as a transmission element, transmitting the rotational motion generated by the drive mechanism 620 to the cross shear plate 640. The cross shear plate 640 is typically made of high-strength material to withstand large torques and shearing forces, and to ensure stability and accuracy during testing.

[0091] A cross-shaped shear plate 640 is installed at the other end of the shearing rod 630, directly contacting and shearing the soil sample. Its cross shape allows it to generate a uniform shear stress distribution during rotation. The shearing rod 630 is rotated by a drive mechanism 620, causing the cross-shaped shear plate 640 to perform a rotational shearing action, thereby simulating shearing behavior under actual working conditions.

[0092] When the drive mechanism 620 is activated, it transmits rotational motion to the cross-shaped shear plate 640 via the shear rod 630. As the cross-shaped shear plate 640 rotates, it applies shear force to the surrounding soil sample, mimicking the shear stress experienced by soil in a real environment. Throughout the rotational shearing process, the shear testing system 600 can monitor and record various parameters in real time, such as shear force, rotational speed, and displacement. This data is crucial for evaluating the shear strength and other mechanical properties of the soil sample.

[0093] Clearly, this technology allows for multiple tests to be completed in a short period, improving work efficiency and making it particularly suitable for rapid evaluation needs in field operations or large-scale engineering projects. Furthermore, when used with a mobile chassis, shear tests can be performed directly on undisturbed soil layers at the construction site to obtain firsthand data.

[0094] like Figure 3 As shown, in some embodiments, the shear test system 600 further includes a grooving mechanism 610, which is disposed on the frame 100 and is used to groove the road surface.

[0095] In these embodiments, the shear testing system 600 includes not only the drive mechanism 620, the shear bar 630, and the cross shear plate 640, but also an additional grooving mechanism 610. This grooving mechanism 610 is mounted on the frame 100 and is used to groove the road surface.

[0096] The primary task of the grooving mechanism 610 is to precisely cut the pavement or subgrade surface at the location to be tested, forming a groove of predetermined size. This helps ensure the consistency and accuracy of samples during shear tests. By grooving, surface debris or loose material can be removed, exposing fresh soil surface, thus providing more ideal conditions for subsequent shear tests. The groove formed after grooving can serve as a standard sample area for shear tests, making test results from different locations more comparable.

[0097] In addition, when encountering frozen soil layers, it facilitates the placement of the cross shear plate 640. In frozen soil layers, the cross shear plate 640 cannot be inserted into the soil layer and needs to be slotted using the grooving mechanism 610. After slotting, the cross shear plate 640 is placed in. It is specifically designed to facilitate geological exploration in Tibetan areas and has the best effect on hard soil layers and frozen soil layers.

[0098] For example, the grooving mechanism 610 is a wheel grooving device. Of course, in other embodiments, the grooving mechanism 610 may also be a chainsaw grooving device, a milling machine, or a hydraulic breaker, etc.

[0099] The grooving mechanism 610 is fixed to the frame 100 of the mobile chassis, ensuring it can be put into use immediately after the vehicle arrives at the designated location. It is typically equipped with a sharp cutting blade or other suitable cutting tools, and the depth and width can be adjusted as needed. The power source can be an electric motor, hydraulic motor, etc., providing sufficient power to complete efficient cutting operations.

[0100] To ensure the quality and accuracy of grooving, the grooving mechanism 610 may be equipped with an automatic control system that allows the operator to set specific parameters (such as groove depth and groove width) and monitor the entire process.

[0101] like Figure 4 As shown, in some embodiments, the roadbed performance testing device also includes an excavation system 400, which is used to excavate the road surface.

[0102] In these embodiments, the subgrade performance testing device includes not only a mobile chassis, a shear testing system 600, and a penetration testing system 500, but also an additional excavation system 400. This excavation system 400 is used to excavate the surface of the road surface or subgrade to prepare test samples or to conduct deeper soil analysis.

[0103] Obtaining deep samples: The excavation system 400 can reach different layers of the roadbed to collect undisturbed soil samples, which is crucial for evaluating soil properties at different depths.

[0104] Cleaning the working surface: By excavating, loose materials, vegetation or other obstacles on the surface can be removed, providing a clean working surface for subsequent tests (such as shear tests, penetration tests).

[0105] Repair and maintenance: If defects or damage are found in certain areas, the excavation system 400 can help remove the damaged parts for repair or reinforcement.

[0106] The excavating system 400 is fixed to the frame 100 of the mobile chassis, ensuring it can be put into use immediately after the vehicle arrives at the designated location. It is typically equipped with a bucket, grab bucket, or other suitable excavating tools, and the excavation depth and width can be adjusted as needed. The power source for the excavating system 400 can be an electric motor, hydraulic motor, etc., providing sufficient power to complete efficient excavation operations.

[0107] To ensure the accuracy and safety of the excavation, the excavation system 400 may be equipped with an automatic control system that allows the operator to set specific parameters (such as excavation depth and width) and monitor the entire process.

[0108] During excavation, the mobile chassis needs to have good stability, so it is equipped with additional support feet or balancing devices. Of course, a ground anchor system can also be installed on the chassis 100. The ground anchor system mainly provides anchoring force to the entire chassis 100, increasing the stability of the entire chassis 100 during the inspection process. For example, the anchoring system 800 includes four threaded drill rods, which are rotatably connected to the chassis 100. The four threaded drill rods are drilled into the ground to a certain depth to provide anchoring force.

[0109] like Figure 4 As shown, in some embodiments, the excavation system 400 includes a shovel 410 and a lifting mechanism 430. The lifting mechanism 430 is disposed on the frame 100 and connected to the shovel 410. The lifting mechanism 430 is used to drive the shovel 410 away from or towards the road surface.

[0110] In these embodiments, the excavation system 400 includes a shovel 410 and a lifting mechanism 430. This design allows the shovel 410 to move away from or closer to the road surface under the drive of the lifting mechanism 430, thereby achieving effective excavation of the road surface or roadbed surface.

[0111] The shovel blade 410 is the part that comes into direct contact with the soil or other materials, responsible for digging, moving, and clearing the workface. The shovel blade 410 is typically curved or flat, with sharp edges to improve cutting efficiency. The shovel blade 410 is made of high-strength, wear-resistant materials, such as reinforced steel, to withstand various types of soil and rock.

[0112] The lifting mechanism 430 is fixed to the frame 100 of the mobile chassis, ensuring its stability and ability to withstand large loads. It is connected to the shovel 410 via a robotic arm or other connector, providing precise vertical movement control. For example, a hydraulic cylinder can be used as the primary power source to generate powerful thrust, suitable for heavy-duty digging tasks. Alternatively, an electric motor can be used to drive a lead screw or chain drive, suitable for situations requiring fine adjustments.

[0113] In other words, by controlling the movement of the lifting mechanism 430, the shovel 410 can be raised (away from the road surface) or lowered (closer to the road surface) to perform different digging depths. Some designs also allow for adjustment of the angle of the shovel 410 to adapt to different working surfaces or to perform digging at specific angles.

[0114] Once the vehicle reaches the designated location, the operator can activate the lifting mechanism 430 via the control system to lower the shovel 410 to near the ground, preparing for excavation. The shovel 410 first gently touches the ground, then gradually increases pressure, cutting into the soil. As the vehicle moves forward, the shovel 410 continuously cuts the soil and loads it into the bucket. The operator can adjust the height of the lifting mechanism 430 at any time to change the excavation depth as needed. After excavation is complete, the lifting mechanism 430 activates again, raising the shovel 410 to a safe height to avoid obstructing subsequent operations or causing unnecessary damage.

[0115] For example, a fixed support member 440 is added, and the shovel plate 410 is located at the front end of the frame 100. When the shovel plate 410 is working, the fixed support member 440 is used to connect the entire shovel plate 410 to the front end of the frame 100, providing support for the shovel plate 410. Of course, in other embodiments, the shovel plate 410 can also be provided at the rear end of the frame 100. For example, the fixed support member 440 can be a support rod, and the two ends of the support rod are detachably connected to the back of the shovel plate 410 and the front end of the frame 100, respectively.

[0116] like Figure 4 As shown, in some embodiments, the excavation system 400 further includes at least one grooving cutter 420 having a tip facing the lower end of the shovel plate 410, and the grooving cutter 420 is movably disposed on the shovel plate 410. The direction of movement of the grooving cutter 420 has a component in the height direction, such that the tip can switch between a state below the lower end of the shovel plate 410 and a state not below the lower end of the shovel plate 410.

[0117] In these embodiments, the digging system 400 includes not only the shovel 410 and the lifting mechanism 430, but also at least one grooving cutter 420. This grooving cutter 420 has a tip and is movable in the height direction, allowing its tip to switch between a state below the lower end of the shovel 410 and a state not below the lower end of the shovel 410.

[0118] The tip of the grooving cutter 420 is used to cut the road surface or soil layer to form a groove of predetermined width and depth. Through a movable setting, the tip can be switched between different heights to adapt to different grooving requirements.

[0119] Before formal excavation, the grooving cutter 420 can pre-cut the target area to expose fresh soil surface, which is convenient for subsequent excavation by the shovel 410.

[0120] For example, the grooving cutter 420 is mounted on the shovel plate 410 and can move up and down along the guide rail 1220 or other guiding device. The drive mechanism can be a hydraulic cylinder, an electric motor, or a manual adjustment device, providing sufficient power to control the lifting and lowering movement of the grooving cutter 420.

[0121] When the grooving cutter 420 is not needed, it is raised to a position no lower than the lower end of the shovel plate 410 to avoid obstructing normal excavation operations. When grooving is required, the grooving cutter 420 is lowered below the lower end of the shovel plate 410, with its tip contacting the ground. As the vehicle moves forward or the shovel plate 410 moves, the grooving cutter 420 cuts into the soil, forming the desired groove. After grooving is completed, the grooving cutter 420 is raised again to its initial position, ready for the next operation.

[0122] For example, the number of slotted blades can be 1, 2, 3, 4, 5, 6, 7 or 8, etc.

[0123] In some embodiments, the roadbed performance testing device also includes a data acquisition and control system 1100, which automatically acquires and stores data on the one hand, and controls the entire roadbed performance testing device, including its movement, etc. In particular, it determines the testing range according to the pre-input road grade, and can then work automatically according to the program, saving manpower and material resources.

[0124] The roadbed performance testing device also includes a locator 1000, which provides positioning services for the entire roadbed performance testing device, especially during the testing process. After the mechanical properties are detected, the parameters are mapped one-to-one with the road station numbers, ensuring safe construction in the later stages.

[0125] The roadbed performance testing device also includes a radar system 900, whose main function is to monitor the geological structure of the testing area in real time and ultimately provide a three-dimensional model of the road structure within the system. The radar system 900 includes a ranging wheel to determine and monitor the testing distance.

[0126] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.

[0127] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0128] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A mobile chassis, characterized in that, The mobile chassis has a height direction, and the mobile chassis includes: Frame; A pair of traveling mechanisms, the pair of traveling mechanisms being disposed on the vehicle frame, the traveling mechanisms having a grounding portion for contacting the road surface; in the pair of traveling mechanisms, one of the traveling mechanisms is a wheeled traveling mechanism and the other is a tracked traveling mechanism; At least one travel switching mechanism is provided on the vehicle frame, and at least one of the pair of travel mechanisms is connected to the travel switching mechanism. The travel switching mechanism is used to adjust the position of the grounding part of the corresponding travel mechanism in the height direction, so as to enable the grounding part of the pair of travel mechanisms to switch between a state away from the road surface and a state in contact with the road surface.

2. The mobile chassis according to claim 1, characterized in that, The wheeled walking mechanism is connected to the walking switching mechanism, and the wheeled walking mechanism has walking wheels; The walking switching mechanism includes: A guide rail is provided on the vehicle frame and extends along the height direction; A wheel seat, wherein the wheel seat and the guide rail are slidably connected, and the traveling wheel is rotatably mounted on the wheel seat; A drive unit is disposed on the frame and connected to the wheel seat. The drive unit is used to drive the wheel seat to move along the extension direction of the guide rail.

3. The mobile chassis according to claim 2, characterized in that, Only the wheeled walking mechanism is connected to the walking switching mechanism, and the tracked walking mechanism has a drive sprocket and a track; The mobile chassis also includes a power mechanism and a drive shaft. The power mechanism is mounted on the frame and connected to the drive shaft. The power mechanism is used to drive the drive shaft to rotate. The drive shaft is connected to the drive sprocket. When the wheeled walking mechanism is in the road contact state, the walking wheels are in contact with the road surface, the tracks are detached from the road surface, and one end of the drive shaft is detachably connected to the walking wheels.

4. The mobile chassis according to claim 3, characterized in that, When the wheeled walking mechanism is in the state of contact with the road surface, the walking wheel and the drive shaft are coaxial, and one end of the drive shaft is detachably connected to the walking wheel.

5. A roadbed performance testing device, characterized in that, The roadbed performance testing device includes: A mobile chassis, wherein the mobile chassis is the mobile chassis as described in any one of claims 1 to 4; A shear testing system, wherein the shear testing system is mounted on the frame of the mobile chassis; The probing system includes at least one of the following: a static probing system and a dynamic probing system, wherein the probing system is disposed on the frame of the mobile chassis.

6. The roadbed performance testing device according to claim 5, characterized in that, The shearing test system includes a drive mechanism, a shearing rod, and a cross shearing plate. The drive mechanism is connected to one end of the shearing rod, and the other end of the shearing rod is connected to the cross shearing plate. The drive mechanism is used to drive the shearing rod to rotate, so that the cross shearing plate performs a rotational shearing action.

7. The roadbed performance testing device according to claim 6, characterized in that, The shear test system also includes a grooving mechanism, which is mounted on the vehicle frame and is used to groove the road surface.

8. The roadbed performance testing device according to claim 5, characterized in that, The roadbed performance testing device also includes an excavation system, which is used to excavate the road surface.

9. The roadbed performance testing device according to claim 8, characterized in that, The excavation system includes a shovel and a lifting mechanism. The lifting mechanism is mounted on the vehicle frame and connected to the shovel. The lifting mechanism is used to drive the shovel away from or towards the road surface.

10. The roadbed performance testing device according to claim 9, characterized in that, The excavation system further includes at least one grooving cutter having a tip facing the lower end of the shovel plate, and the grooving cutter being movably disposed on the shovel plate. The direction of movement of the grooving cutter has a component in the height direction, such that the tip can switch between a state below the lower end of the shovel plate and a state not below the lower end of the shovel plate.

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