Tracked vehicle dynamometer

Abstract

The invention relates to a crawler-type vehicle dynamometer, and belongs to the technical field of dynamometer equipment. The deck assembly and the track assembly are combined to form a special dynamometer structure special for the track vehicle, the dynamic real-time monitoring system and the static calibration system are matched, on-line calibration and data closed-loop verification in the testing process are achieved, the problem of data uncertainty is consolidated through static calibration, and the dynamic real-time monitoring system and the static calibration system are matched with each other. And the accuracy of a test result is obviously improved. Secondly, a distributed electric inertia simulation technology for simulating and predicting equipment by adopting a simulation tracked vehicle can accurately reproduce complex dynamic characteristics of the tracked vehicle, and overcomes the limitation of mechanical inertia simulation on corresponding speed and precision. Besides, the motor of the power output assembly is loaded through the simulation crawler, the torque, rotating speed and speed test range of the system is widened, the test requirements of the wide constant power area of the motor of the crawler can be better matched, and the authenticity and coverage range of working condition simulation are enhanced.

Description

Technical Field

[0001] This invention relates to a dynamometer for tracked vehicles, belonging to the technical field of dynamometer equipment. Background Technology Currently, the dynamometers for tracked vehicles on the market mainly adopt technical solutions such as chassis dynamometer benches and distributed independent dynamometers. As the core testing equipment for key indicators such as the power performance, transmission efficiency and energy consumption characteristics of tracked vehicles, their core principle is to use the load loading unit built into the bench to simulate the complex load conditions such as road resistance, slope resistance and inertial resistance encountered by the vehicle in actual driving, so as to achieve comprehensive testing of the output characteristics of the tracked vehicle's power system and the power matching performance of the whole vehicle.

[0002] However, these technologies have significant limitations: First, traditional offline static calibration methods result in relatively simple test data, leading to uncertainties in the accuracy and reliability of the test results; second, tracked vehicles and wheeled vehicles have significant structural differences, and directly applying the relevant dynamometer technologies for wheeled vehicles faces compatibility challenges, as the accuracy and response speed of inertia simulation are often insufficient to meet the requirements, thus affecting the authenticity of the test results; third, the core mechanical load devices are limited by their own torque-speed characteristics, making it difficult to fully cover the complex operating conditions of tracked vehicle motors, which require wide constant power, high speed, and large torque.

[0003] Therefore, there is an urgent need to find a dynamometer device specifically designed for tracked vehicles that can solve the above-mentioned technical problems. Summary of the Invention

[0004] To address the above problems, the present invention provides a tracked vehicle dynamometer, comprising: The base frame, load-bearing components, and lifting components are arranged sequentially from bottom to top; A deck assembly is mounted above a lifting assembly, and a fixing assembly is provided on the surface of the deck assembly to fix the vehicle under test. The track assembly includes a first pulley and a second pulley respectively disposed on both sides of the lifting assembly and a driven assembly disposed on the top of the lifting assembly. The first pulley and the second pulley are connected by track drive. The upper part of the track is exposed in the middle gap of the deck assembly. At the same time, the driven assembly also cooperates with the track. The track motor drives the first pulley. The first pulley, the second pulley and the driven assembly are synchronously driven by the track. A dynamic real-time monitoring system and a static calibration system that connect the track components; When testing tracked vehicles, the operating speed and torque are monitored in real time through a dynamic real-time monitoring system and a static calibration system. After collecting data, the status of the equipment and the vehicle are analyzed, thereby realizing online calibration and data closed-loop verification of the testing process.

[0005] Furthermore, the deck assembly includes multiple columns fixed to the ground and surrounding the underframe, load-bearing assembly, and lifting assembly, as well as a dynamometer deck disposed on the top of the columns. The dynamometer deck has two symmetrically arranged strip-shaped central gaps to expose the upper surface of the tracks.

[0006] Furthermore, the part of the column that connects to the ground is provided with a shielding structure, which is an epoxy resin insulating board sleeved on the column, and the epoxy resin insulating board is also provided with an embedded threaded sleeve.

[0007] Furthermore, the load-bearing component is composed of rectangular tubes and I-beams connected together, and its side is also provided with reinforcing ribs.

[0008] Furthermore, the lifting assembly is a welded frame formed by welding pipes, C-shaped steel, and steel plates.

[0009] Furthermore, the driven component includes a first driven component and a second driven component. The first driven component includes a spindle fixed to the lifting component by a bearing seat and a roller mating on the spindle. A tensioning sleeve is also provided at the mating point between the roller and the spindle. The second driven component includes a welding seat fixed to the lifting component and a roller assembly arranged on the welding seat, with fixing plates provided at both ends of the roller assembly.

[0010] Furthermore, the fixing assembly includes multiple tension piles fixed to the upper surface of the dynamometer deck. The tension piles are symmetrically arranged on both sides of the vehicle under test, and an elastic rope is connected between two opposing tension piles to fix the vehicle under test.

[0011] Furthermore, the elastic ropes are arranged in a crisscross pattern after being tensioned.

[0012] Furthermore, the dynamic real-time monitoring system comprises a torque sensor disposed on the second pulley, an angle encoder disposed on the first pulley, and a speed sensor disposed at the front of the first pulley.

[0013] Furthermore, the static calibration system includes a static calibrator positioned tangent to either the first pulley or the second pulley.

[0014] The beneficial effects of this invention are: This invention constructs a specialized dynamometer structure for tracked vehicles by combining deck and track components. Coupled with a dynamic real-time monitoring system and a static calibration system, it achieves online calibration and data closed-loop verification during the testing process. Static calibration also effectively addresses data uncertainty, significantly improving the accuracy of test results. Secondly, the use of a simulated tracked vehicle to simulate the distributed electric inertia of the predictive equipment accurately reproduces the complex dynamic characteristics of tracked vehicles, overcoming the limitations of mechanical inertia simulation in terms of speed and accuracy. Furthermore, by applying load to the motor of the power output component using a simulated tracked vehicle, the system's torque, speed, and velocity testing range are broadened, better matching the testing requirements of the tracked vehicle's wide constant power range, thus enhancing the realism and coverage of the operating condition simulation. Attached Figure Description

[0015] Figure 1 This is a three-dimensional view of the tracked vehicle dynamometer in one embodiment of the present invention.

[0016] Figure 2 This is a cross-sectional view of a tracked vehicle dynamometer according to one embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the connection between the column and the ground in one embodiment of the present invention.

[0018] Figure 4 This is a cross-sectional view of the first driven component in one embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the second driven component in one embodiment of the present invention.

[0020] In the diagram, 1. Underframe; 2. Load-bearing assembly; 31. First pulley; 32. Second pulley; 4. Lifting assembly; 5. First driven assembly; 6. Second driven assembly; 7. Track; 8. Deck assembly; 9. Tension pile; 10. Static calibrator; 11. Torque sensor; 12. Unpowered simulated tracked vehicle; 13. Angle encoder; 14. Speed ​​sensor; 81. Epoxy resin insulating board; 82. Embedded threaded sleeve; 51. Bearing housing; 52. Mandrel; 53. Roller; 54. Expansion sleeve; 61. Roller assembly; 62. Fixing plate; 63. Welding seat. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 invention based on the specific circumstances.

[0023] In this invention, the terms "first" and "second" are used only to distinguish similar components / parts in different positions or with different characteristics, and have no other limiting meaning; "upper" refers to the direction in which each component is away from the ground, and "lower" refers to the direction in which each component is away from the ground.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] This invention provides a tracked vehicle dynamometer. The supporting structure comprises, from bottom to top, a base frame 1, a load-bearing component 2, and a lifting component 4, serving as the core support structure for the entire tracked vehicle dynamometer and providing a stable foundation for the installation and operation of subsequent functional components. The base frame 1 is constructed from thickened steel plates and features anti-slip pads and ground fixing holes at the bottom. This effectively distributes the overall weight load of the equipment, preventing data accuracy issues caused by equipment shaking during testing, and also adapts to different ground surfaces, improving the equipment's installation adaptability. The load-bearing component 2 is constructed from rectangular tubes and I-beams connected by full welding, with multiple reinforcing ribs evenly distributed on the sides. This structural design is simple, compact, and highly efficient in material utilization, significantly reducing manufacturing costs. Furthermore, the synergistic effect of the rectangular tube's cavity structure and the I-beam's bending resistance significantly enhances the load-bearing component 2's resistance to deformation and fatigue strength. Even under the long-term pressure of heavy tracked vehicles, it maintains structural stability, extending the overall service life of the equipment. The open frame structure also facilitates later maintenance and component replacement. The lifting component 4 consists of tubular components and C-shaped... The integrated welded frame formed by welding steel sections and steel plates has high integrity and rigidity. During the welding process, precise positioning ensures the assembly accuracy of each component, which not only facilitates processing and manufacturing but also reduces the difficulty and workload of on-site assembly. Furthermore, the cavity structure of the welded frame can form a natural stress dispersion channel, effectively absorbing the vibration generated by the track drive during testing and reducing the impact of vibration on other components. At the same time, it facilitates the installation and commissioning of track 7, driven components 5 and 6, and adapts to the testing needs of tracked vehicles of different specifications.

[0026] Secondly, a deck assembly 8 and a track assembly are installed on the upper part of the support structure, specifically as follows: In some embodiments, the deck assembly 8 is mounted above the lifting assembly 4, and the surface of the deck assembly 8 is provided with fixing components for securing the vehicle under test. The deck assembly 8 includes multiple columns fixed to the ground and surrounding the base frame 1, the load-bearing assembly 2, and the lifting assembly 4. The columns are made of high-strength alloy material, which not only provides stable support for the dynamometer deck but also effectively isolates the test area from the external environment, preventing unauthorized personnel or debris from entering the test area and improving the safety of the test process. The dynamometer deck, located on top of the columns, is made of anti-slip and wear-resistant steel plate with a sandblasted surface to increase the friction with the tires of the vehicle under test and prevent the vehicle from slipping during testing. Two strip-shaped central gaps are symmetrically opened on the dynamometer deck. The width of the gaps can be adaptively adjusted according to the specifications of the track 7 to fully expose the upper surface of the track 7, ensuring that the track of the vehicle under test can accurately fit with the dynamometer track 7, while avoiding the risk of jamming or derailment during vehicle movement.

[0027] In some embodiments, the shielding structure is an epoxy resin insulating board 81 sleeved on the column, and the epoxy resin insulating board 81 is further provided with an embedded threaded sleeve 82. In addition to excellent electrical insulation properties, the epoxy resin insulating board 81 also has wear-resistant, aging-resistant, and corrosion-resistant characteristics, effectively protecting the column from the erosion of oil, moisture, and dust in the testing environment, extending the service life of the column, and avoiding safety hazards caused by static electricity or leakage during testing. The embedded threaded sleeve 82 is made of high-strength alloy steel and is integrally molded with the epoxy resin insulating board 81, ensuring a firm connection and preventing it from easily falling off. This not only allows for quick disassembly and replacement of the insulating board, reducing maintenance costs, but also allows for the adaptation of various specifications of fasteners, improving the versatility of the deck assembly 8. Furthermore, the high precision of the internal thread of the threaded sleeve ensures good connection stability even after repeated disassembly and assembly, guaranteeing the assembly accuracy of the shielding structure.

[0028] In some embodiments, the track assembly includes a first pulley 31 and a second pulley 32 respectively disposed on both sides of the lifting assembly 4, and a driven component disposed on the top of the lifting assembly 4. The first pulley 31 and the second pulley 32 can be made of high-strength wear-resistant cast iron, which can effectively reduce wear during long-term transmission and extend the service life of the pulleys. The edges of the pulleys are provided with anti-slip-out structures to prevent the track 7 from falling off during transmission. The first pulley 31 and the second pulley 32 are connected by the track 7. The upper part of the track 7 is exposed in the middle gap of the deck assembly 8. At the same time, the driven component also cooperates with the track 7. The track motor drives the first pulley 31. The first pulley 31, the second pulley 32 and the driven component are synchronously transmitted through the track 7. This transmission method has high transmission efficiency and low power loss, and can accurately simulate the driving state of tracked vehicles under different road conditions.

[0029] In some embodiments, the driven assembly includes a first driven assembly 5 and a second driven assembly 6. The first driven assembly 5 includes a spindle 52 fixed to the lifting assembly 4 via a bearing seat 51 and rollers 53 mating on the spindle 52. The bearing seat 51 contains a high-precision rolling bearing with low friction, which improves the rotational flexibility of the spindle 52 and reduces power loss. The rollers 53 effectively buffer the pressure of the track 7, reduce impact wear between the track and the rollers, and extend the service life of both. A shrink sleeve 54 is also provided at the mating point of the rollers 53 and the spindle 52. The shrink sleeve 54 adopts a conical shrinking structure, which is easy to install and accurately positioned. It does not require additional fastening bolts and can ensure no relative slippage between the rollers 53 and the spindle 52 through the shrinking force, thereby improving transmission stability. At the same time, it is easy to disassemble and facilitates later maintenance. The second driven assembly 6 includes a welding seat 63 fixed to the lifting assembly 4 and a roller assembly 61 arranged on the welding seat 63. The track 7 is fully welded to the lifting assembly 4, resulting in high connection strength and the ability to withstand the significant pressure transmitted by the track 7. The roller assembly 61 uses multiple sets of small-diameter rollers arranged in parallel to evenly distribute the pressure on the track 7, preventing localized stress concentration that could damage the track. Fixing plates 62 are also provided at both ends of the roller assembly 61. These fixing plates 62 have a detachable structure, which restricts the axial displacement of the roller assembly 61, preventing rollers from falling off, and facilitating maintenance and replacement of the roller assembly 61. In some embodiments, the driven assembly may also include a third driven assembly (not shown), located at the center of the top of the lifting assembly 4, forming a triangular distribution with the first driven assembly 5 and the second driven assembly 6. This further enhances the support stability of the track 7, preventing track deviation during high-speed transmission or under eccentric loads, and further dispersing the pressure on the track 7, extending its service life.

[0030] In some implementations, the tracked vehicle dynamometer also includes a dynamic real-time monitoring system and a static calibration system connected to the track assembly. When testing the tracked vehicle, the dynamic real-time monitoring system and the static calibration system monitor the operating speed and torque in real time. After collecting data, the equipment status and vehicle status are analyzed, thereby realizing online calibration and data closed-loop verification of the testing process, ensuring the accuracy and reliability of the test data, and providing a scientific basis for the performance evaluation of the tracked vehicle.

[0031] In some embodiments, the fixing assembly includes multiple tension piles 9 fixed to the upper surface of the dynamometer deck. The tension piles 9 are symmetrically arranged on both sides of the vehicle under test. The tension piles 9 are made of stainless steel with an anti-corrosion treatment, exhibiting high strength and resistance to rust. Their bottoms are fixed to the dynamometer deck by pre-embedded bolts, ensuring a secure connection and allowing them to withstand significant tensile force. An elastic rope connects two opposing tension piles 9 to secure the vehicle under test. The elastic rope can be made of high-elasticity polyurethane fiber, possessing high tensile strength and good resilience. Its flexible contact prevents scratches or crush damage to the vehicle body, protecting the appearance and structural integrity of the vehicle under test. Furthermore, the elastic ropes, when tensioned, form a crisscross pattern. This arrangement can restrict the displacement of the vehicle under test from all horizontal directions, effectively preventing vehicle swaying or lateral movement during acceleration, braking, or steering simulations, thus improving the safety and stability of the testing process.

[0032] In the example shown in Figure 1, four tension piles 9 are set at the four corners on both sides of the vehicle under test. Elastic ropes connect the two diagonally opposite tension piles 9, resulting in a crisscross arrangement when the two elastic ropes are tensioned. In other embodiments, the number of tension piles 9 can be adjusted to six or eight depending on the size of the vehicle under test, symmetrically arranged on both sides and the front and rear ends of the vehicle. In addition to the diagonally connected elastic ropes forming a crisscross arrangement, transverse elastic ropes can be added between adjacent tension piles 9 on the same side, forming a composite fixing structure of "crisscross + transverse," further improving the fixing reliability and adapting to the testing needs of tracked vehicles of different sizes and weights. Furthermore, the tension piles 9 can also be equipped with a height adjustment mechanism, allowing the extension height of the tension piles 9 to be changed by rotating the adjustment rod, so as to adapt to vehicles under test with different ground clearances, ensuring that the elastic ropes are tensioned at the optimal angle and improving the fixing effect.

[0033] In some embodiments, the dynamic real-time monitoring system comprises a torque sensor 11 disposed on the second pulley 32, an angle encoder 13 disposed on the first pulley 31, and a speed sensor 14 disposed at the front of the first pulley 31. The torque sensor 11 adopts a high-precision strain gauge structure, with a wide measurement range and high accuracy. It can acquire torque data of the second pulley 32 in real time, with fast response speed and accurate capture of dynamic changes in torque, providing core data for vehicle dynamic performance analysis. The angle encoder 13 can accurately measure the rotation angle and angular velocity of the first pulley 31, providing reliable data for speed calculation. Its signal transmission is stable and its anti-interference ability is strong, ensuring the continuity of data acquisition. The speed sensor 14 is set in front of the first pulley 31 and adopts non-contact infrared sensing technology. It does not need to directly contact the pulley, avoiding wear. At the same time, it has high measurement accuracy and fast response, and can monitor the linear velocity of the first pulley 31 in real time. It complements the data from the angle encoder 13, improving the accuracy of speed measurement. The three work together, and the measurement data is transmitted to the control system in real time through the data acquisition module, realizing the synchronous real-time acquisition of multiple parameters such as torque, speed, and angle. The data transmission delay is low, providing comprehensive and accurate raw data for the analysis of equipment status and vehicle status, facilitating the timely detection of abnormalities in the testing process, and ensuring test safety and data validity.

[0034] In some embodiments, the static calibration system includes a static calibrator 10 positioned tangent to either the first pulley 31 or the second pulley 32. The static calibrator 10 employs a mechanical calibration structure, which is easy to operate and provides high calibration accuracy. It can periodically perform static calibration on the torque and speed measurement parameters of the dynamometer, eliminating measurement errors after long-term use of the equipment, ensuring the accuracy and reliability of data collected by the dynamic real-time monitoring system, and achieving traceability of test data. The static calibrator 10 adopts a detachable installation structure, connecting to the lifting assembly 4 via a quick-release connector, facilitating carrying and storage. The calibration process does not require disassembling the pulley assembly; calibration can be completed simply by moving the static calibrator 10 to a position tangent to the pulley, improving calibration efficiency and reducing operational difficulty. In other embodiments, the static calibrator 10 may also be equipped with a data storage module to automatically record calibration data for each calibration, including calibration time, calibration value, error range, and other information, which facilitates subsequent querying and traceability. At the same time, it supports data interaction with the dynamic real-time monitoring system to realize the linkage analysis of calibration data and test data, further improve the effectiveness of data closed-loop verification, and ensure that the dynamometer is in a state of accurate testing for a long time.

[0035] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A dynamometer for tracked vehicles, characterized in that, include: The base frame, load-bearing components, and lifting components are arranged sequentially from bottom to top; A deck assembly is mounted above a lifting assembly, and a fixing assembly is provided on the surface of the deck assembly to fix the vehicle under test. The track assembly includes a first pulley and a second pulley respectively disposed on both sides of the lifting assembly and a driven assembly disposed on the top of the lifting assembly. The first pulley and the second pulley are connected by track drive. The upper part of the track is exposed in the middle gap of the deck assembly. At the same time, the driven assembly also cooperates with the track. The track motor drives the first pulley. The first pulley, the second pulley and the driven assembly are synchronously driven by the track. A dynamic real-time monitoring system and a static calibration system that connect the track components; When testing tracked vehicles, the operating speed and torque are monitored in real time through a dynamic real-time monitoring system and a static calibration system. After collecting data, the status of the equipment and the vehicle are analyzed, thereby realizing online calibration and data closed-loop verification of the testing process.

2. The tracked vehicle dynamometer according to claim 1, characterized in that, The deck assembly includes multiple columns fixed to the ground and surrounding the underframe, load-bearing assembly, and lifting assembly, as well as a dynamometer deck located on top of the columns. The dynamometer deck has two symmetrical strip-shaped central gaps to expose the upper surface of the tracks.

3. The tracked vehicle dynamometer according to claim 2, characterized in that, The part of the column that connects to the ground is provided with a shielding structure, which is an epoxy resin insulating board sleeved on the column. The epoxy resin insulating board is also provided with an embedded threaded sleeve.

4. The tracked vehicle dynamometer according to claim 1, characterized in that, The load-bearing component is composed of rectangular tubes and I-beams connected together, and its side is also provided with reinforcing ribs.

5. The tracked vehicle dynamometer according to claim 4, characterized in that, The lifting assembly is a welded frame formed by welding pipes, C-shaped steel, and steel plates.

6. The tracked vehicle dynamometer according to claim 1, characterized in that, The driven component includes a first driven component and a second driven component. The first driven component includes a spindle fixed to the lifting component by a bearing seat and a roller mating on the spindle. A shrink sleeve is also provided at the mating point between the roller and the spindle. The second driven component includes a welding seat fixed to the lifting component and a roller assembly arranged on the welding seat, with fixing plates provided at both ends of the roller assembly.

7. The tracked vehicle dynamometer according to claim 1, characterized in that, The fixing assembly includes multiple tension piles fixed to the upper surface of the dynamometer deck. The tension piles are symmetrically arranged on both sides of the vehicle to be tested, and an elastic rope is connected between two opposite tension piles to fix the vehicle to be tested.

8. The tracked vehicle dynamometer according to claim 7, characterized in that, The elastic ropes are laid out in a cross pattern after being tensioned.

9. The tracked vehicle dynamometer according to claim 1, characterized in that, The dynamic real-time monitoring system comprises a torque sensor located on the second pulley, an angle encoder located on the first pulley, and a speed sensor located at the front of the first pulley.

10. The tracked vehicle dynamometer according to claim 1, characterized in that, The static calibration system includes a static calibrator positioned tangent to either the first or second pulley.

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