Adjustable Hub Chassis Dynamometer for Heavy-Duty Wheelbase Testing
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Solution Overview
Problem
Existing chassis dynamometers are inadequate for heavy-duty and high-power applications, particularly for large vehicles, due to complex transmission structures, limited flexibility in adjusting wheelbase, and inability to accurately simulate various environmental conditions.
Innovation Solution
A heavy-duty, high-power chassis dynamometer with adjustable hub assemblies, including fixed and sliding pairs, equipped with driving, brake, and tension sensor assemblies, integrated with an environmental test chamber for simulating diverse conditions, allowing precise testing of vehicles under varying environmental parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a complex transmission structure is used in existing hub chassis dynamometers, then the lifting and centering functions are achieved, but the torque and power cannot be greatly improved and it is not suitable for testing heavy-duty trucks and large vehicles
Solution Approach 1:
The patent extracts the lifting and centering functions from the complex transmission structure by introducing independent lifting mechanisms and centering guides. The lifting mechanism comprises lifting cylinders that independently control hub assembly elevation, while centering guides provide lateral positioning. This separation allows the transmission structure to be simplified while maintaining necessary functions and enabling higher torque and power testing capabilities for heavy-duty vehicles.
Solution Approach 2:
The hub assembly is segmented into distinct functional modules: lifting mechanism, centering mechanism, brake assembly, and driving assembly. Each module operates independently with specific functions. The lifting mechanism handles vertical movement, centering mechanism handles lateral positioning, brake assembly provides braking force, and driving assembly generates driving torque. This segmentation allows for optimized performance in each function while reducing overall system complexity.
2Adaptability or versatility
If existing dynamometers use fixed hub assemblies, then the structure is simple, but they cannot adjust the center distance between front and back hubs according to different wheelbases, requiring multiple power testing systems
Solution Approach 1:
The hub assembly transitions from a fixed structure to a dynamic, adjustable structure. The centering guide provides lateral movement capability, allowing the hub assembly to adjust its position along the longitudinal axis. This dynamic positioning system enables the same dynamometer to accommodate different wheelbases by adjusting the center distance between front and back hub assemblies, eliminating the need for multiple power testing systems while maintaining structural simplicity through modular design.
3Reliability
If existing dynamometers lack environmental simulation capability, then the structure remains simple, but they cannot accurately simulate various environmental conditions affecting vehicle performance
Solution Approach 1:
The dynamometer system is designed with multi-functionality by integrating environmental simulation capabilities into the existing hub assembly structure. The hub assembly serves multiple functions: mechanical testing, environmental simulation, and data collection. Environmental chambers can be integrated around the hub assembly to simulate different temperature, humidity, and other environmental conditions, allowing accurate performance detection under varying environmental factors while maintaining a unified system architecture.
Data Source
AI summary
A heavy-duty, high-power and large-torque chassis dynamometer for a multi-environmental system, comprising a power testing platform disposed on the ground and a rack located below the power testing platform. A fixed base and a sliding base are sequentially disposed on an inner side of the rack in a length direction of the power testing platform, a pair of first hub assemblies are mounted on the fixed base through a plurality of support frames, a sliding platform is disposed on the sliding base, and a pair of second hub assemblies are mounted on the sliding platform through a plurality of support frames. Tension sensor assemblies are connected to outer circumferences of the first hub assemblies and outer circumferences of the second hub assemblies, and are fixedly disposed on the support frames.