Throttle Return Spring Support Layout for Lower Friction
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Solution Overview
Problem
Conventional throttle devices experience excessive load and potential decentering of coil springs due to eccentric support of the opener and return spring parts, leading to increased friction and wear, which can affect the durability and efficiency of the throttle mechanism.
Innovation Solution
The throttle device incorporates an inner and outer circumferential support system for the coil spring, ensuring balanced support of the opener and return spring parts, reducing decentering and friction, and stabilizing the coil spring's position during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If only one of the opener spring part and the return spring part is supported by the outer circumferential support part, then the coil spring can be held between the body and the gear, but excessive load is applied to the intermediate hook and the spring parts become eccentric
Solution Approach 1:
The patent applies different support configurations to different parts of the coil spring. Specifically, the opener spring part is supported by both the inner circumferential support part and the outer circumferential support part, while the return spring part is supported only by the inner circumferential support part. This localized differentiation of support quality ensures balanced load distribution and prevents excessive loading on the intermediate hook.
Solution Approach 2:
The patent creates a balanced support system where both the opener spring part and the return spring part have equivalent support conditions through the inner circumferential support part. By ensuring that both spring parts are supported from the inside at comparable positions, the system achieves equipotentiality in terms of support quality, preventing eccentricity and excessive load concentration.
2Ease of manufacture
If the opener spring part and the return spring part are supported at different positions, then the coil spring can be held, but the spring parts become eccentric and friction increases
Solution Approach 1:
The patent implements localized support quality differentiation where the opener spring part receives dual support (inner and outer circumferential) while the return spring part receives single support (inner circumferential only). This local quality adjustment optimizes the support configuration to prevent eccentricity and reduce frictional energy loss during operation.
Solution Approach 2:
By providing equivalent inner circumferential support to both spring parts at corresponding positions, the patent creates equipotential support conditions that minimize eccentric movement and reduce frictional energy loss, while still allowing for manufacturable assembly variations.
3Reliability
If the coil spring is held with conventional support, then the throttle valve can be biased to the default position, but the intermediate hook experiences excessive load when one spring part vibrates
Solution Approach 1:
The patent applies differentiated local support quality to the coil spring components. The opener spring part is supported by both inner and outer circumferential support parts, while the return spring part is supported only by the inner circumferential support part. This localized support enhancement prevents excessive vibration and load transmission to the intermediate hook, improving its durability while maintaining reliable throttle valve positioning.
Solution Approach 2:
By providing equivalent inner circumferential support to both spring parts, the patent creates balanced support conditions that prevent differential vibration and excessive load concentration on the intermediate hook, thereby improving both reliability and component strength.
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
This configuration reduces rotational resistance, prolongs the lifespan of the throttle device components, allows for a smaller motor and improved speed reduction ratio, and enhances the overall durability and efficiency of the throttle mechanism.
Implementation Method 1
a coil spring held between the throttle body and the rotation member and biasing the throttle valve toward a default position
Data Source
AI summary
A throttle device includes a coil spring that has a first spring part, a second spring part, and an intermediate hook connecting the first spring part to the second spring part for biasing a throttle valve. The first spring part is engaged with a rotation member coupled to a throttle shaft. The second spring part is engaged with a throttle body. The intermediate hook is configured to engage with a first stopper formed on the rotation member and a second stopper formed on the throttle body. The intermediate hook includes a first part on the first spring part side and a second part on the second spring part side. When the intermediate hook is engaged with the first stopper or the second stopper, the first part abuts on the first stopper or the second stopper.