Chassis Dynamometer Load-Motor Support Without Spherical Joints
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Solution Overview
Problem
Existing chassis dynamometer apparatuses face defects due to radial loads generated by counter-torque during load motor rotation, causing the spherical joint to malfunction.
Innovation Solution
A chassis dynamometer apparatus with a supporting mechanism that includes a tilting support and rotary support, allowing the load motor to tilt and rotate without using a spherical joint, and incorporates return devices to automatically return the load motor to a neutral attitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a spherical joint is used to support the load motor, then the load motor can tilt and rotate, but the radial load from counter-torque causes the inner cylinder to over the collar, making the spherical joint malfunction
Solution Approach 1:
The spherical joint is divided into separate functional components: a tilting support for tilting motion and a rotary support for rotation motion. This segmentation allows each component to handle specific motion types independently, eliminating the radial load problem that occurred when both motions were combined in a single spherical joint.
Solution Approach 2:
A tilting shaft is introduced as an intermediary component between the load motor and the rotary support. This tilting shaft enables the tilting function while transmitting rotational motion to the rotary support, thereby separating the tilting and rotation functions and preventing the spherical joint malfunction.
2Adaptability or versatility
If a spherical joint is used to support the load motor, then the load motor can tilt and rotate, but the structure becomes complex and maintenance becomes difficult
Solution Approach 1:
The supporting mechanism is segmented into distinct functional modules: a tilting support with a tilting shaft for tilting motion, and a rotary support with a rotary shaft for rotation motion. This modular segmentation simplifies the overall structure by eliminating the need for a complex spherical joint while maintaining both tilting and rotation capabilities.
Solution Approach 2:
Instead of using a spherical joint that combines both tilting and rotation in a single complex component, the invention inverts the approach by using separate simple components for each function, thereby reducing structural complexity and improving maintainability.
3Adaptability or versatility
If the load motor tilts during rotation, then the counter-torque generates radial load, but this causes the inner cylinder to over the collar in the spherical joint
Solution Approach 1:
The supporting mechanism is segmented into distinct functional modules: a tilting support with a tilting shaft for tilting motion, and a rotary support with a rotary shaft for rotation motion. This modular segmentation simplifies the overall structure by eliminating the need for a complex spherical joint while maintaining both tilting and rotation capabilities.
Solution Approach 2:
Instead of using a spherical joint that combines both tilting and rotation in a single complex component, the invention inverts the approach by using separate simple components for each function, thereby reducing structural complexity and improving maintainability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures stable tilting and rotation of the load motor, preventing spherical joint defects and simplifying the return mechanism, while allowing automatic recovery to a neutral position after testing.
Implementation Method 1
an elastic member (233) interposed between each of the first inclined pieces (231a) and each of the second inclined pieces (232a), the elastic member(s) being pressed between each of the first inclined pieces (231a) and each of the second inclined pieces (232a), and an elastic force being generated in the elastic member(s) when each of the movable units (232) tilts associated with tilting of the load motor (M), and the elastic member(s) causing the load motor (M) to return to the neutral attitude when the elastic force is released
Data Source
AI summary
On a premise that a longitudinal direction of an automobile is defined as an x-axis direction and a width direction of the automobile is defined as a y-axis direction, a supporting mechanism S includes a tilting support 2 which is disposed below a load motor M and tiltably supports the load motor M in an axis line direction of a rotational axis M1 of the load motor M with respect to a top-down direction, a rotary support 3 which is disposed below the load motor M and rotatably supports the load motor M in an x-y plane, a mounting frame 4 connected to the load motor M through the tilting support 2, a movable table 1 which is positioned just below the mounting frame 4 and connected to the mounting frame 4 through the rotary support 3, and a sliding portion 5 which is disposed just below each of end portions in the x-axis direction of the movable table 1 and is capable of causing the movable table 1 to slide in both the x-axis direction and the y-axis direction.