Chassis Dynamometer Load Motor Posture Synchronization
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Solution Overview
Problem
Conventional chassis dynamometer apparatuses fail to synchronize the postures of load motors with load wheels of a vehicle, particularly during vehicle turns, due to limitations in adjusting the load motors' positions and angles to match the caster and camber angles of the load wheels.
Innovation Solution
A chassis dynamometer apparatus with a pedestal-mounted load motor system, featuring a mounting frame, base, first and second movable mounts, and a spherical joint that allows sliding, tilting, and rotation in arbitrary directions, ensuring synchronization of load motor postures with load wheels, including a design that shortens the height of the pedestal and reduces overhanging components to prevent misdetection by sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If load motors are mounted on a fixed pedestal, then the structure is simple and stable, but the postures of load motors cannot be synchronized with load wheels during vehicle turns
Solution Approach 1:
The patent applies dynamics by transforming the fixed pedestal into a dynamic structure with movable mounts that can slide along guide rails. The first movable mount slides in the x-axis direction, the second movable mount slides in the y-axis direction, and the spherical joint provides rotational freedom, allowing the load motor to dynamically adjust its posture to synchronize with the load wheel during vehicle turns and various driving conditions.
Solution Approach 2:
The patent segments the pedestal structure into multiple independent movable components: a first movable mount for x-axis movement, a second movable mount for y-axis movement, and a spherical joint for rotational adjustment. This segmentation allows each component to independently adjust, providing comprehensive posture synchronization while maintaining structural clarity and manageability.
2Volume of moving object
If the pedestal height is reduced to make the apparatus compact, then the overall size is smaller, but components may overhang and cause misdetection by sensors
Solution Approach 1:
The patent resolves the space conflict by utilizing multiple dimensional movements. The load motor can achieve the required posture adjustment through combined x-axis sliding, y-axis sliding, and spherical joint rotation, rather than increasing pedestal height. This multi-dimensional adjustment approach maintains a compact vertical profile while ensuring proper component positioning to prevent sensor misdetection.
3Manufacturing precision
If movable mounts and spherical joints are added to enable posture synchronization, then load motor alignment with load wheels is improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple adjustment functions into an integrated movable mount system. The first movable mount combines x-axis sliding capability, the second movable mount combines y-axis sliding capability, and the spherical joint combines rotational adjustments. This merging of functions into unified components achieves precise positioning while avoiding the complexity of multiple separate adjustment mechanisms.
Data Source
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AI summary
In the chassis dynamometer apparatus 1, a pedestal 3 contains a mounting frame 31 on which a load motor 2 is mounted, and a base 32 under the mounting frame. Provided that a longitudinal direction of a vehicle is an x-axis direction and a width direction of the vehicle is a y-axis direction, a first movable mount(s) 4 slidable in one side of the x-axis or y-axis direction, a second movable stand 5 slidable in the other side of the x-axis or y-axis direction, and a spherical joint 6 tiltable and rotatable in an arbitrary direction are connected in series between the mounting frame and the base.