Throttle Shaft Driven Gear Integration and Assembly
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Solution Overview
Problem
The existing throttle apparatus for general engines requires a complex assembly process due to the need for separate components, including a throttle shaft, driven gear, and detected body block, which increases the number of components and assembly time.
Innovation Solution
The throttle apparatus integrates the driven gear on one end of the throttle shaft and forms the detected body block with a smaller outer diameter than the holding hole, allowing for advanced assembly where the detected body block is attached before inserting the throttle shaft, reducing the number of components and simplifying the assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driven gear and detected body block are attached as separate components to the throttle shaft after assembly, then the throttle shaft can be properly supported by the holding hole, but the number of components increases and assembly becomes complicated
Solution Approach 1:
The patent integrates the driven gear directly onto the throttle shaft, making them a single integrated component rather than separate parts. This merging reduces the total number of components while maintaining the functional requirements of both the throttle shaft support and the driven gear operation
Solution Approach 2:
The detected body block is designed with a diameter smaller than the holding hole, allowing it to be pre-assembled onto the throttle shaft before the entire assembly is inserted into the holding hole. This preliminary action simplifies the assembly sequence by eliminating the need for separate post-assembly operations
2Reliability
If the detected body block has a large outer diameter to ensure proper mounting, then it can be securely attached to the throttle shaft, but it cannot be assembled in advance through the holding hole
Solution Approach 1:
The detected body block is designed with a specific local characteristic: its outer diameter is intentionally made smaller than the holding hole diameter. This local dimensional quality allows the block to pass through the holding hole during assembly while maintaining secure attachment functionality once positioned
Solution Approach 2:
By designing the detected body block with a smaller diameter, the patent enables preliminary assembly where the block is attached to the throttle shaft before insertion into the holding hole, simplifying the overall manufacturing and assembly process
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 the number of components and assembly time, facilitating the fabrication of the throttle apparatus by allowing the detected body block to be easily attached and the throttle shaft to be inserted into the holding hole, thereby simplifying the assembly process.
Implementation Method 1
an electrically driven motor that transmits a rotation operation force to the driven gear
Implementation Method 2
a detected body block which is attached to another end part in the axial direction of the throttle shaft and in which a state of the throttle shaft is detected by a sensor
Data Source
AI summary
A general engine throttle apparatus includes a throttle body 12, a throttle valve 13, a throttle shaft 14, a driven gear 24, an electrically driven motor 15, and a detected body block 26. The throttle valve 13 opens and closes an intake air introduction hole 11. The throttle shaft 14 holds the throttle valve 13 and is rotatably supported by a holding hole 16 of the throttle body 12. The electrically driven motor 15 transmits a rotation operation force to the driven gear 24. The detected body block 26 is attached to another end part in an axial direction of the throttle shaft 14, and a state of the throttle shaft 14 is detected by a sensor. The driven gear 24 is integrally formed on one end side in the axial direction of the throttle shaft 14. The detected body block 26 is formed to have a maximum outer diameter that is smaller than a minimum inner diameter of the holding hole 16.