CN117848736A - Self-adaptive vehicle-ground dual-purpose vehicle chassis strength testing system - Google Patents

Abstract

The invention relates to the technical field of vehicle testing, and discloses a self-adaptive vehicle-ground dual-purpose vehicle chassis strength testing system which is used for testing the strength of a locking mechanism on a vehicle tail beam and comprises the following components: the actuating mechanism comprises a bearing device, a loading device and a leveling device, wherein the bearing device is arranged on a tail beam of a vehicle, the loading device is fixed on the bearing device and hinged with the locking mechanism, the loading device is used for applying load to the locking mechanism, the leveling device is arranged between the bearing device and the ground, and the height of the leveling device can be adjusted to be used for adjusting the loading inclination angle of the loading device; the control system comprises a controller, wherein the controller is respectively and electrically connected with the loading device and the leveling device, the controller is used for controlling the loading load of the loading device, and the controller is also used for controlling the height of the leveling device so as to adjust the loading inclination angle of the loading device; and the health monitoring system is used for monitoring the stress and deformation of the tail boom, the locking mechanism and the executing mechanism in the test process and predicting faults.

Description

Self-adaptive vehicle-ground dual-purpose vehicle chassis strength testing system

Technical Field

The invention relates to the technical field of vehicle testing, in particular to a self-adaptive vehicle-ground dual-purpose vehicle chassis strength testing system.

Background

The part of heavy-duty vehicle has the function of erection, and the carriage can take a locking mechanism on the tail beam of the vehicle as a fulcrum to finish the action of erection under the pushing of the electric cylinder. The locking mechanism is fixed on the tail beam of the heavy-duty vehicle chassis through welding, and the structural strength of the chassis and the welding quality of the locking mechanism determine whether the vehicle can smoothly complete the erection action. Therefore, before a heavy-duty vehicle with a standing function is tested, a loading test is required to be carried out on the locking mechanism, and the welding quality of the locking mechanism and the structural strength of the chassis of the vehicle are detected.

The existing welding quality and chassis structural strength test of the locking mechanism generally adopts a mode of applying external load, and the test method has the following difficulties:

firstly, the vehicle must be fixed in the loading process, if the vehicle moves in the loading process, the test result lacks accuracy, the vehicle body is usually fixed by means of ground equipment, the vehicle body of the heavy-duty vehicle is longer, the ground equipment required for fixing is relatively complex, and the preparation work before the test is time-consuming and labor-consuming;

secondly, the vehicle is prevented from being damaged in the loading process, the test is established on the basis of not damaging the vehicle, in order to fully verify the structural strength of the chassis, the test is required to simulate the erection moment of the vehicle under the full-load working condition, so that the loaded load is larger, the time is shorter, the impact on the vehicle is larger at the loading moment, and the vehicle is easy to deform or turn over;

thirdly, the applicable occasion of the existing heavy-duty vehicle chassis strength testing device is usually a flat ground, if the gradient exists in the testing site, the testing device cannot automatically adjust and adapt to the situation, and the vehicle chassis cannot be loaded accurately, so that the testing accuracy is low;

fourth, the commonality of current heavy-duty vehicle chassis intensity testing arrangement is lower, can't be applied to other test tasks after accomplishing vehicle chassis test task, causes the waste of test resource.

Disclosure of Invention

Based on the above, the invention aims to provide a self-adaptive vehicle-ground dual-purpose vehicle chassis strength testing system, which aims to solve the technical problems of severe testing conditions, complex process, low safety, poor accuracy and poor universality of the testing device in the prior art.

In order to achieve the above purpose, the invention adopts the following technical scheme:

provided is an adaptive on-board-ground dual-purpose vehicle chassis strength test system, comprising:

the actuating mechanism comprises a bearing device, a loading device and a leveling device, wherein the bearing device is arranged on a tail beam of a vehicle, the loading device is fixed on the bearing device and hinged with the locking mechanism, the loading device is used for applying load to the locking mechanism, the leveling device is arranged between the bearing device and the ground, and the height of the leveling device can be adjusted to be used for adjusting the loading inclination angle of the loading device;

the control system comprises a controller, wherein the controller is respectively and electrically connected with the loading device and the leveling device, the controller is used for controlling the loading load of the loading device, and the controller is also used for controlling the height of the leveling device so as to adjust the loading inclination angle of the loading device;

and the health monitoring system is used for monitoring the stress and deformation of the tail boom, the locking mechanism and the executing mechanism in the test process and predicting faults.

As a preferable scheme of the self-adaptive vehicle-ground dual-purpose vehicle chassis strength testing system, the bearing device comprises a bearing beam and a base bracket which are detachably connected, the bearing beam comprises at least one bearing cross beam, at least one bearing vertical beam and a connecting plate, the connecting plate is arranged below the bearing cross beam, and the connecting plate is used for being connected with the tail beam;

the base support comprises a base cross beam, a base longitudinal beam and a base vertical beam, wherein at least one plug hole for plugging the bearing vertical beam is formed in the base cross beam, and a loading mounting hole for mounting the loading device is formed in the base vertical beam.

As a preferable scheme of the self-adaptive vehicle-ground dual-purpose vehicle chassis strength testing system, the executing mechanism can be arranged on the tail boom or the ground according to working conditions;

the tail beam is fixedly provided with a vertical cylinder support, the vertical cylinder support and the connecting plate are provided with hinge holes, when the executing mechanism is installed on the tail beam, the bearing beam is hinged with the tail beam through a pin shaft inserted in the hinge holes, the base support is inserted and fixed with the bearing beam from the lower part of the vertical cylinder support, a test space for accommodating the locking mechanism is formed between the bearing vertical beam and the base vertical beam, and the loading device is arranged in the test space and hinged with the locking mechanism;

the executing mechanism further comprises a ground base, a bearing tool and a fixing component, wherein the ground base is fixed on the ground, the bearing beam is fixedly inserted into the base support when the executing mechanism is installed on the ground, the fixing component is used for fixing the bearing device on the ground base, a test space is formed between the bearing vertical beam and the base vertical beam, the bearing tool is arranged in the test space and is fixed with the bearing device, the bearing tool is used for bearing a workpiece to be tested, and the loading device is arranged in the test space and is hinged with the workpiece to be tested.

As an optimized scheme of the self-adaptive vehicle-ground dual-purpose vehicle chassis strength testing system, the bearing tool comprises a tool base and a bearing platform, the tool base is fixed on the bearing device, the bearing platform is arranged above the tool base in a sliding mode and is used for bearing the workpiece to be tested, and the bearing platform can move horizontally and vertically relative to the tool base so that the workpiece to be tested is aligned with the loading device.

As a preferable scheme of the self-adaptive vehicle-ground dual-purpose vehicle chassis strength testing system, the loading device comprises a hydraulic pump, a hydraulic cylinder and an adapter plate, wherein the hydraulic cylinder is fixed in the loading mounting hole, a cylinder arm of the hydraulic cylinder is positioned in the testing space and is connected with the adapter plate, the adapter plate is hinged with the locking mechanism or the workpiece to be tested, and the hydraulic cylinder applies load to the locking mechanism or the workpiece to be tested through the adapter plate.

As a preferable scheme of the self-adaptive vehicle-ground dual-purpose vehicle chassis strength testing system, the loading device further comprises an oil tank and a hydraulic valve, the oil tank, the hydraulic valve, the hydraulic pump and the hydraulic cylinder are sequentially hydraulically connected in series, and the control system controls the loading load of the hydraulic cylinder by controlling the hydraulic pump.

As the optimal scheme of the self-adaptive vehicle-ground dual-purpose vehicle chassis strength testing system, the leveling device comprises a servo electric cylinder and supporting legs, when the actuating mechanism is installed on the vehicle, the cylinder body of the servo electric cylinder is fixed on the base support, the cylinder arm of the servo electric cylinder is connected with the supporting legs, the supporting legs are arranged on the ground, and the servo electric cylinder can adjust the self height to adjust the inclination angle of the base support.

As an optimal scheme of the self-adaptive vehicle-ground dual-purpose vehicle chassis strength testing system, the health monitoring system comprises a monitoring module and an acquisition module, the acquisition module comprises a plurality of sensors, the sensors are respectively arranged on the tail boom, the locking mechanism, the bearing device and the loading device, and the health monitoring system is used for regularly acquiring detection values of the sensors in the testing process and utilizing the monitoring module to carry out fault diagnosis and fault prediction.

As a preferable scheme of the self-adaptive vehicle-ground dual-purpose vehicle chassis strength testing system, the control system is in communication connection with the health monitoring system, and the acquisition module comprises an inclination angle sensor, a pressure sensor and at least two strain sensors;

the controller dynamically adjusts the height of the leveling device according to the detection value of the inclination sensor;

the pressure sensor is arranged on the loading device and is used for detecting the applied load of the loading device and feeding back the applied load to the controller in real time;

at least two strain sensors are respectively arranged on the tail beam and the locking mechanism, and the monitoring module is used for regularly collecting strain values of the tail beam and the locking mechanism and carrying out fault diagnosis and fault prediction.

As a preferable scheme of the self-adaptive vehicle-ground dual-purpose vehicle chassis strength testing system, the health monitoring system further comprises a health management module, wherein the health management module is used for recording testing data and timely informing a user and a manager of processing after finding out data abnormality or giving an alarm.

The beneficial effects of the invention are as follows:

1) The self-adaptive vehicle-ground dual-purpose vehicle chassis strength testing system provided by the invention has two use types, the vehicle-mounted type can be assembled on a heavy-duty vehicle to carry out loading test on a chassis locking mechanism, the ground type can be configured on a ground surface to carry out loading test on a component and a mechanism, the two use types can be mutually converted, only part of components are required to be replaced in the conversion process, and the testing device can quickly carry out splicing conversion according to the testing requirement, so that the testing application range is wider and the universality is better.

2) When the vehicle-mounted type vehicle-mounted system is used, the actuating mechanism and the vehicle chassis are assembled into a whole, the loading force is converted into the internal force, the vehicle cannot move or roll over due to loading, and the vehicle body does not need to be fixed during testing.

3) When the system is used in a vehicle-mounted mode, the executing mechanism is provided with the leveling device, and the self-adaptive leveling function can be realized by matching with the control system, so that the accuracy of loading test is improved.

4) The system can realize the multi-angle and multi-mode loading test function of the chassis locking mechanism, on one hand, the function of adjusting the thrust of the loading device under different loads and different inclinations is met, and on the other hand, the functions of impact and fatigue tests and various self-defined thrust change curve tests are realized.

5) The actuating mechanism of the system can be adjusted according to the position of the support of the vertical cylinder of the vehicle, can be assembled on various heavy-duty vehicles with the tightening function, and has good applicability.

6) The system can realize the automatic test of the whole process, and has higher safety, good maintainability and expandability. Real-time display, recording, processing and analysis of all operating process states and data are realized.

7) The system is provided with a health monitoring system, can monitor the running states of the executing mechanism, the vehicle chassis and the locking mechanism in real time and predict faults, and ensures the safety of the vehicle and the testing device in the testing process.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.

FIG. 1 is a block diagram of a vehicle-mounted chassis strength testing system provided by the present invention;

FIG. 2 is a second block diagram of the vehicle-mounted chassis strength test system provided by the invention;

FIG. 3 is a block diagram of a load beam of the chassis strength test system provided by the present invention;

FIG. 4 is a block diagram of a base bracket of the chassis strength testing system provided by the present invention;

FIG. 5 is a block diagram of a loading device of the chassis strength testing system provided by the present invention;

FIG. 6 is a block diagram of a leveling device of the chassis strength testing system provided by the present invention;

FIG. 7 is a schematic diagram of a conversion of the installation of the chassis strength test system provided by the present invention;

FIG. 8 is a block diagram of a chassis strength testing system in a floor mounted form provided by the present invention;

FIG. 9 is a block diagram of a load-bearing tooling of the chassis strength test system provided by the invention;

FIG. 10 is a layout of the whole vehicle structure and the acquisition module provided by the invention;

FIG. 11 is a schematic diagram of the control system of the chassis strength testing system provided by the present invention;

FIG. 12 is a general architecture diagram of a health monitoring system of the chassis strength testing system provided by the present invention;

FIG. 13 is a schematic diagram of the hardware system components of the health monitoring system of the chassis strength testing system provided by the present invention;

fig. 14 is a flow chart of a software system implementation of the health monitoring system of the chassis strength testing system provided by the present invention.

The figures are marked as follows:

10. tail boom; 11. a locking mechanism; 12. a vertical cylinder support; 20. an actuator; 21. a carrying device; 211. a load beam; 2111. a first load beam; 2112. a second load beam; 2113. a third load beam; 2114. a first load bearing vertical beam; 2115. a second load bearing vertical beam; 2116. a connecting plate; 212. a base bracket; 2121. a base cross beam; 2122. a base longitudinal beam; 2123. a base vertical beam; 2124. loading the mounting hole; 22. a loading device; 221. a hydraulic cylinder; 222. an adapter plate; 23. leveling means; 231. a servo electric cylinder; 232. a support leg; 24. a ground base; 25. carrying a tool; 251. a tool base; 252. a load-bearing platform; 26. a fixing assembly; a-p, sensor.

Detailed Description

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The invention provides a self-adaptive vehicle-ground dual-purpose vehicle chassis strength testing system, which is used for testing the welding strength of a locking mechanism 11 on a vehicle tail beam 10, and comprises the following components: the device comprises an executing mechanism 20, wherein the executing mechanism 20 comprises a bearing device 21, a loading device 22 and a leveling device 23, the bearing device 21 is arranged on a tail boom 10 of a vehicle, the loading device 22 is fixed on the bearing device 21 and hinged with a locking mechanism 11, the loading device 22 is used for applying load to the locking mechanism 11, the leveling device 23 is arranged between the bearing device 21 and the ground, and the height of the leveling device 23 can be adjusted for adjusting the loading inclination angle of the loading device 22;

the control system comprises a controller, wherein the controller is respectively and electrically connected with the loading device 22 and the leveling device 23, the controller is used for controlling the loading load of the loading device 22, and the controller is also used for controlling the height of the leveling device 23 so as to adjust the loading dip angle of the loading device 22;

the health monitoring system is used for monitoring the stress and deformation of the tail boom 10, the locking mechanism 11 and the executing mechanism 20 in the testing process and carrying out fault prediction.

The self-adaptive vehicle-ground dual-purpose vehicle chassis strength test system provided by the invention has two use types, namely a vehicle-mounted type and a ground type, can be mutually converted through splicing, the vehicle-mounted type execution mechanism 20 and the vehicle are assembled into a whole, the loading force in the test is an internal force, and the vehicle is ensured not to move or roll over in the loading process; according to the invention, the loading angle, the loading and the change rate of the device can be adjusted by the control system, so that multi-angle and multi-mode loading tests can be carried out; the invention can monitor the health states of the vehicle and the testing device in real time through the health monitoring system, thereby guaranteeing the safety of the vehicle and the testing device.

The actuator 20 is a loading unit and a carrying unit of the testing device, and has two usage modes of vehicle-mounted type and ground type: as shown in fig. 1 and 2, the vehicle-mounted actuating mechanism 20 includes a bearing device 21, a loading device 22, and a leveling device 23, and can be assembled on the tail beam 10 of the vehicle to perform a loading test on the locking mechanism 11, wherein the bearing device 21 is composed of a bearing beam 211 and a base bracket 212, and is used for bearing an internal load in the test, and an inclination sensor is arranged on the bearing device 21, and is used for measuring the transverse inclination and the longitudinal inclination of the actuating mechanism 20.

Specifically, as shown in fig. 3 and 4, the bearing beam 211 is composed of at least one bearing cross beam, at least one bearing vertical beam, and a connection plate 2116. In this embodiment, the load beam 211 is composed of three load beams, two load vertical beams and a connection board 2116, the load beams include a first load beam 2111, a second load beam 2112 and a third load beam 2113, the load vertical beams are a first load vertical beam 2114 and a second load vertical beam 2115, and the connection board 2116 is disposed below the third load beam 2113.

Base bracket 212 includes a base cross beam 2121, a base longitudinal beam 2122, and a base vertical beam 2123, where at least one insertion hole for inserting a load vertical beam is provided on base cross beam 2121, and a load mounting hole 2124 for mounting load device 22 is provided on base vertical beam 2123. Trunnions are arranged on the first bearing beam 2111 and the second bearing beam 2112, trunnions are also arranged on corresponding positions on the base vertical beam 2123, and pin shafts are inserted into the trunnions so as to fix the bearing beam 211 and the base bracket 212. The connecting plate 2116 is provided with bolt holes for hinging the erection cylinder support 12 on the tail boom 10 of the vehicle, the third bearing cross beam 2113 is provided with a sliding groove, and the connecting plate 2116 can be adjusted in position along the sliding groove so as to adapt to other heavy-load vehicle chassis. In addition, hanging points are arranged on the bearing cross beam, the bearing vertical beam and the base vertical beam 2123 and used for hanging and splicing the bearing device 21.

The actuating mechanism 20 can be installed on the tail boom 10 or the ground according to working conditions, the vertical cylinder supporting seat 12 is fixed on the tail boom 10, the hinge holes are formed in the vertical cylinder supporting seat 12 and the connecting plate 2116, when the actuating mechanism 20 is installed on the tail boom 10, the bearing beam 211 is hinged with the tail boom 10 through a pin shaft inserted in the hinge holes, the base support 212 is fixedly inserted with the bearing beam 211 from the lower part of the vertical cylinder supporting seat 12, a test space for accommodating the locking mechanism 11 is formed between the bearing vertical beam and the base vertical beam 2123, and the loading device 22 is arranged in the test space and hinged with the locking mechanism 11.

The loading device 22 is configured as shown in fig. 5, where the loading device 22 is composed of a hydraulic pump, an oil tank, a hydraulic valve, a hydraulic cylinder 221 and an adapter plate 222, and is used for loading the locking mechanism 11 on the tail beam 10, the hydraulic cylinder 221 is fixed in the loading mounting hole 2124, the cylinder arm of the hydraulic cylinder 221 is located in the test space and connected with the adapter plate 222, the adapter plate 222 is hinged with the locking mechanism 11 or the workpiece to be tested, and the hydraulic cylinder 221 applies a load to the locking mechanism 11 or the workpiece to be tested through the adapter plate 222. The oil tank, the hydraulic valve, the hydraulic pump and the hydraulic cylinder 221 are hydraulically connected in series in sequence, and the control system controls the loading load of the hydraulic cylinder 221 by controlling the hydraulic pump.

As shown in fig. 6, the leveling device 23 is configured such that the leveling device 23 is composed of a servo motor cylinder 231 (including a displacement sensor therein) and a leg 232, and is configured to adjust a loading tilt angle of the actuator 20, wherein when the actuator 20 is mounted on a vehicle, a cylinder body of the servo motor cylinder 231 is fixed to the base bracket 212, a cylinder arm of the servo motor cylinder 231 is connected to the leg 232, the leg 232 is disposed on the ground, and the servo motor cylinder 231 is configured to adjust a self-height to adjust the loading tilt angle of the actuator 20. In the present embodiment, two leveling devices 23 are provided, and two leveling devices 23 are provided at both ends of the base stringer 2122 of the base bracket 212, respectively.

The control system is used for controlling the loading device 22 to apply load to the locking mechanism 11, and simultaneously is used for controlling the height of the leveling device 23 to control the loading inclination angle of the loading device 22. The principle of the control system is shown in fig. 12, and the control system is used as the core of the testing device and mainly comprises a switch, an indicator light, a buzzer, a configuration screen, a sensor transmitter, a hydraulic cylinder 221 servo controller and an electric cylinder servo controller. The switch comprises a scram switch and an operation switch, wherein the scram switch is used for scram power-off protection of equipment, and the operation switch is used for starting and stopping operation; the indicator light is used for indicating the running state (such as running, fault and the like) of the system; the buzzer is used for warning and alarming in the test process; the configuration screen is used for inputting test parameters (such as loading force, test angle and the like) and displaying test data and results; the sensor transmitter is used for converting analog quantity data of various sensors into digital quantity data which can be processed by the PLC controller; the hydraulic cylinder 221 servo controller realizes accurate closed-loop control of loading force by connecting the hydraulic cylinder 221 with a pressure sensor, and simultaneously receives a command of a PLC controller to output loading force with corresponding magnitude; the electric cylinder servo controller is connected with an electric supporting leg (internally provided with a position sensor) to carry out closed-loop control on the height of the supporting leg, and meanwhile, the electric cylinder servo controller is matched with an inclination angle sensor and a tail beam sensor, and a leveling control function is realized through a PLC internal leveling control algorithm.

Further, the control system loads a test function, and aims to control the thrust of the loading device 22, and the control system can adjust the loading force according to the setting of a user and simulate the bearing of the chassis under different standing weights; the loading test function of the control system can also set thrust changes (such as impact and fatigue test) under various requirements, and the dynamic load loading test function is realized through the thrust curve setting function.

Further, the control system has an automatic test function. In the test process, test parameters and test commands can be input through a configuration screen or monitoring software in a reinforced computer, the control system executes leveling and thrust loading according to corresponding control logic, strain data of the execution mechanism 20, the vehicle chassis and the locking mechanism 11 collected by the health monitoring system are read, and after loading is finished, test analysis results are automatically given through comparison analysis with preset strain parameter thresholds.

The control system has a self-adaptive leveling function, the self-adaptive leveling function aims at controlling the leveling device 23 to adjust the horizontal pushing angle of the loading device 22 and the locking mechanism 11 according to the gradient of the test site, and the specific working process is as follows: the PLC collects the inclination angle information of the inclination angle sensor and the vehicle chassis, a leveling control algorithm in the PLC performs operation processing to generate a control command for the height position of the servo electric cylinder 231, leveling legs on two sides of the actuating mechanism 20 perform leveling action, during leveling, according to an inclination angle signal of the vehicle chassis, the longitudinal inclination angle of the actuating mechanism 20 is adjusted first, then the transverse inclination angle is adjusted, and the inclination angle of the actuating mechanism 20 is consistent with the vehicle chassis after leveling.

The control system self-adaptive leveling function can realize horizontal loading of the loading device 22 on the locking mechanism 11 on one hand and simulate stress conditions of the locking mechanism 11 under different erection angles on the other hand. After the leveling of the system is completed, the erection angle to be tested is input into the control system, the height position of the leveling device 23 is adjusted by the control system, the loading angle of the actuating mechanism 20 is changed, and the locking mechanism 11 is subjected to multi-angle loading test.

The hardware system composition and software implementation flow of the health monitoring system are shown in fig. 13 and 14, the health monitoring system is used for monitoring the health conditions of the execution mechanism 20, the vehicle chassis and the locking mechanism 11, strain data of the execution mechanism 20, the vehicle chassis and the locking mechanism 11 can be periodically collected and analyzed, and if strain data exceeding the material characteristics of the mechanism are detected, the system will suspend the loading process of the execution mechanism 20 and stop the strength test. The health monitoring system comprises a monitoring module and an acquisition module, wherein the acquisition module comprises a plurality of sensors which are respectively arranged on the tail boom 10, the locking mechanism 11, the bearing device 21 and the loading device 22, and the monitoring module is used for regularly acquiring detection values of the plurality of sensors in the testing process and carrying out fault diagnosis and fault prediction.

The health monitoring system comprises a hardware system and a software system, wherein the hardware system mainly comprises a sensor, a data transmission network, an interface component and a controller, an automatic data acquisition method is adopted, and a plurality of controllers are connected with a series of peripheral sensors to realize long-time and periodic accurate acquisition of strain data of the actuating mechanism 20, the vehicle chassis and the locking mechanism 11; the software system is divided into a real-time data input module, a timing model updating module and a data storage and display module according to the related functional modules, wherein the real-time data input module transmits the strain data of the execution mechanism 20, the vehicle chassis and the locking mechanism 11 to the background in real time, and the data are subjected to standardized processing and stored in a database; the timing model updating module processes the strain data of the executing mechanism 20, the vehicle chassis and the locking mechanism 11, establishes a fault diagnosis model and a fault prediction model, reflects the health state of each mechanism in real time according to the strain data and predicts faults; the data storage and display module is used for refreshing the front end corresponding to the data in real time, calling the rear end interface, and the rear end diagnosing and predicting the states of the execution mechanism 20, the vehicle chassis and the locking mechanism 11 by reading the fault diagnosis model and the fault prediction model to acquire a real-time state and return the real-time state to the front end interface for display.

Furthermore, the health monitoring system is provided with a health management platform, the platform provides login service for users and management personnel, monitors the health state of the mechanism and predicts faults, timely informs the users and the management personnel after finding out abnormal data or alarming faults, pushes corresponding fault prompts, and timely takes measures to ensure equipment stability and user life safety.

Further, the sensors of the health monitoring system include an inclination sensor, a pressure sensor and a plurality of strain sensors, the inclination sensor is disposed on the bearing device 21 and is used for collecting loading inclination, the pressure sensor is disposed on the adapter plate 222 of the loading device 22 and is used for collecting loading pressure, as shown in fig. 10, the strain sensors are mainly disposed on two sides of the vehicle chassis along the longitudinal distribution, on the bearing device 21 of the executing mechanism 20, on the lock disc, the lock body and the weld joint of the locking mechanism 11 and are used for collecting strain data of the executing mechanism 20, the vehicle chassis, the tail boom 10 and the locking mechanism 11.

As shown in fig. 7 and 8, the actuator 20 can be converted from a vehicle-mounted type to a ground-mounted type to test the strength of other components to be tested, and when the actuator 20 is mounted on the ground, the actuator further comprises a ground base 24, a bearing tool 25 and a fixing assembly 26. The vehicle-mounted executing mechanism 20 is provided with a leveling device 23, is configured on a ground base 24 through a fixing component 26, is assembled with a bearing tool 25, namely is converted into a ground type testing mechanism, and comprises the following specific conversion processes: the hinging of the bearing beam 211 and the erection cylinder support 12, the hinging of the loading device 22 and the tail beam locking mechanism 11 are removed, the connecting pieces of the bearing device 21 are disassembled, the bearing beam 211 and the base bracket 212 are separated, the base bracket 212 leveling device 23 is removed, the loading device 22 is reserved, the base bracket 212 is fixed on the ground base 24 through a T-shaped screw, a pressing plate, a fixed lug and other fixing components 26, wherein the bolt hole of the pressing plate is a slotted hole, the position can be finely adjusted during installation, the fixed lug is pressed on a cross beam A of the base bracket 212, and the fixed lug is fixed on the ground base 24 through a screw; the load beam 211 and the base bracket 212 are reassembled, the load tool 25 is fixed on the load device 21 through screws, and the conversion of the ground type executing mechanism 20 is completed.

As shown in fig. 9, the load tool 25 includes a tool base 251 and a load platform 252, the tool base 251 is fixed on the load device 21, the load platform 252 is slidably disposed above the tool base 251, the load platform 252 is used for carrying a workpiece to be tested, and the load platform 252 can move horizontally and vertically relative to the tool base 251 to align the workpiece to be tested with the loading device 22.

The invention also discloses a testing method of the self-adaptive vehicle-ground dual-purpose vehicle chassis strength testing system, which comprises the following specific steps:

s1, splicing of a bearing device 21 is completed on a vehicle chassis, a bearing beam 211 is vertically hoisted from the upper part of a vehicle tail beam 10, is hinged with a vehicle erection cylinder support 12 through a bolt hole of a connecting plate 2116, a base support 212 is hoisted from the lower part of the vehicle tail beam 10, is fixed in a square interface of a bearing vertical beam base cross beam 2121 through bolts and nuts, and trunnions on the bearing cross beam are in threaded connection with lugs of a base vertical beam 2123, so that the structural strength of the bearing device 21 is improved, and two fixing plates are in threaded connection with the bearing vertical beam and the base cross beam 2121; assembling other components, wherein the loading device 22 is assembled in a circular loading mounting hole 2124 of a vertical base beam 2123 through a screw, a cylinder arm of the hydraulic cylinder 221 is hinged with the tail beam locking mechanism 11 through an adapter plate 222, the leveling device 23 is assembled on two sides of the longitudinal base beam 2122 through bolts, and the vehicle-mounted actuating mechanism 20 is assembled;

s2, the control system performs closed-loop control on the height of the supporting leg of the leveling device 23, completes leveling action by matching with angle data of the inclination sensor and the tail beam sensor, and after the action is finished, the inclination of the loading device 22 is consistent with the inclination of the tail beam 10;

s3, controlling the output force of the loading device 22 on a configuration screen or a reinforced computer monitoring software interface, loading the locking mechanism 11 step by step, reading data by a pressure sensor, sending the data into a PLC controller and monitoring software, and in the loading process, reading strain data of a vehicle chassis, the locking mechanism 11 and the executing mechanism 20 by a health monitoring system, monitoring the health state and predicting faults of the vehicle chassis, the locking mechanism 11 and the executing mechanism, and timely alarming faults when the data are abnormal;

s4, the thrust load loaded on the tail beam locking mechanism 11 meets the requirements, strain values of two sides of a vehicle chassis, a bearing device 21 of an actuating mechanism 20, a locking disc, a locking body and a welding seam of the locking mechanism 11 are read by a strain sensor, and are sent to a PLC controller and monitoring software;

s5, checking the welding seam condition of the locking mechanism 11, and judging whether the welding quality of the locking mechanism 11 meets the standard according to the characteristics of the lock disc, the lock body and the welding seam material and the strain data in the test; checking the deformation condition of the vehicle chassis, and judging whether the structural strength of the vehicle chassis meets the standard according to the chassis material characteristics and the strain data in the test;

s6, after the welding quality of the locking mechanism 11 and the structural strength of the chassis of the vehicle are tested, the loading device 22 is unloaded step by step and reset.

S7, the hinging of the bearing beam 211 and the erection cylinder support 12, the hinging of the loading device 22 and the tail beam locking mechanism 11 are released, all connecting pieces of the bearing device 21 are disassembled, the bearing beam 211 and the base bracket 212 are separated, the base bracket 212 leveling device 23 is disassembled, the loading device 22 is reserved, the base bracket 212 is fixed on the ground base 24 through fixing components 26 such as T-shaped screws, pressing plates and fixing lugs, wherein bolt holes of the pressing plates are oblong holes, the positions can be finely adjusted during installation, the fixing lugs are pressed on a cross beam A of the base bracket 212, and the fixing lugs are fixed on the ground base 24 through screws; the load beam 211 and the base bracket 212 are reassembled, the load tool 25 is fixed on the load device 21 through screws, and the conversion of the ground type executing mechanism 20 is completed;

repeating the operations of S3-S6, testing and checking the strength of the workpiece to be tested on the ground, and after the testing is finished, unloading and resetting the loading device 22 step by step.

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of numerous obvious modifications and substitutions without departing from the scope of the present invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims (10)

1. A self-adaptive vehicle-ground dual-purpose vehicle chassis strength test system for testing the weld strength of a locking mechanism on a vehicle tail boom, comprising:

the actuating mechanism comprises a bearing device, a loading device and a leveling device, wherein the bearing device is arranged on a tail beam of a vehicle, the loading device is fixed on the bearing device and hinged with the locking mechanism, the loading device is used for applying load to the locking mechanism, the leveling device is arranged between the bearing device and the ground, and the height of the leveling device can be adjusted to be used for adjusting the loading inclination angle of the loading device;

the control system comprises a controller, wherein the controller is respectively and electrically connected with the loading device and the leveling device, the controller is used for controlling the loading load of the loading device, and the controller is also used for controlling the height of the leveling device so as to adjust the loading inclination angle of the loading device;

and the health monitoring system is used for monitoring the stress and deformation of the tail boom, the locking mechanism and the executing mechanism in the test process and predicting faults.

2. The adaptive vehicle-ground dual-purpose vehicle chassis strength test system of claim 1, wherein the load-bearing device comprises a detachably connected load-bearing beam and a base bracket, the load-bearing beam comprises at least one load-bearing cross beam, at least one load-bearing vertical beam, and a connecting plate, the connecting plate is disposed below the load-bearing cross beam, and the connecting plate is used for connecting with the tail beam;

the base support comprises a base cross beam, a base longitudinal beam and a base vertical beam, wherein at least one plug hole for plugging the bearing vertical beam is formed in the base cross beam, and a loading mounting hole for mounting the loading device is formed in the base vertical beam.

3. The adaptive on-board-ground dual-purpose vehicle chassis strength test system of claim 2, wherein the actuator is mountable on the tail boom or ground according to operating conditions;

the tail beam is fixedly provided with a vertical cylinder support, the vertical cylinder support and the connecting plate are provided with hinge holes, when the executing mechanism is installed on the tail beam, the bearing beam is hinged with the tail beam through a pin shaft inserted in the hinge holes, the base support is inserted and fixed with the bearing beam from the lower part of the vertical cylinder support, a test space for accommodating the locking mechanism is formed between the bearing vertical beam and the base vertical beam, and the loading device is arranged in the test space and hinged with the locking mechanism;

the executing mechanism further comprises a ground base, a bearing tool and a fixing component, wherein the ground base is fixed on the ground, the bearing beam is fixedly inserted into the base support when the executing mechanism is installed on the ground, the fixing component is used for fixing the bearing device on the ground base, a test space is formed between the bearing vertical beam and the base vertical beam, the bearing tool is arranged in the test space and is fixed with the bearing device, the bearing tool is used for bearing a workpiece to be tested, and the loading device is arranged in the test space and is hinged with the workpiece to be tested.

4. The adaptive on-board-ground dual-purpose vehicle chassis strength testing system of claim 3, wherein the load-bearing tool comprises a tool base and a load-bearing platform, the tool base is fixed to the load-bearing device, the load-bearing platform is slidably disposed above the tool base, the load-bearing platform is configured to bear the workpiece to be tested, and the load-bearing platform is capable of moving horizontally and vertically relative to the tool base to align the workpiece to be tested with the loading device.

5. The adaptive vehicle-ground dual-purpose vehicle chassis strength test system according to claim 3, wherein the loading device comprises a hydraulic pump, a hydraulic cylinder and an adapter plate, the hydraulic cylinder is fixed in the loading mounting hole, a cylinder arm of the hydraulic cylinder is located in the test space and connected with the adapter plate, the adapter plate is hinged with the locking mechanism or the workpiece to be tested, and the hydraulic cylinder applies a load to the locking mechanism or the workpiece to be tested through the adapter plate.

6. The adaptive on-board-ground dual-purpose vehicle chassis strength testing system of claim 5, wherein the loading device further comprises an oil tank and a hydraulic valve, the oil tank, the hydraulic valve, the hydraulic pump, and the hydraulic cylinder are hydraulically connected in series in sequence, and the control system controls the loading load of the hydraulic cylinder by controlling the hydraulic pump.

7. The adaptive vehicle-ground dual-purpose vehicle chassis strength test system according to claim 3, wherein the leveling device comprises a servo electric cylinder and a support leg, the cylinder body of the servo electric cylinder is fixed on the base bracket when the actuator is mounted on the vehicle, the cylinder arm of the servo electric cylinder is connected with the support leg, the support leg is arranged on the ground, and the servo electric cylinder can adjust the self height to adjust the loading inclination angle of the actuator.

8. The adaptive vehicle-ground dual-purpose vehicle chassis strength test system according to claim 1, wherein the health monitoring system comprises a monitoring module and an acquisition module, the acquisition module comprises a plurality of sensors, the plurality of sensors are respectively arranged on the tail boom, the locking mechanism, the bearing device and the loading device, and the health monitoring system is used for regularly acquiring detection values of the plurality of sensors in the test process and performing fault diagnosis and fault prediction by using the monitoring module.

9. The adaptive on-board-ground dual-purpose vehicle chassis strength test system of claim 8, wherein the control system is communicatively coupled to the health monitoring system, the acquisition module comprising an inclination sensor, a pressure sensor, and at least two strain sensors;

the controller dynamically adjusts the height of the leveling device according to the detection value of the inclination sensor;

the pressure sensor is arranged on the loading device and is used for detecting the applied load of the loading device and feeding back the applied load to the controller in real time;

at least two strain sensors are respectively arranged on the tail beam and the locking mechanism, and the monitoring module is used for regularly collecting strain values of the tail beam and the locking mechanism and carrying out fault diagnosis and fault prediction.

10. The adaptive on-board-ground dual-purpose vehicle chassis strength test system of claim 1, further comprising a health management module for recording test data and informing users and management personnel of the process in time after finding data anomalies or failure alarms.