Intake Device Torque Transmission Impact Absorption
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional intake devices for internal combustion engines have high production costs and reduced operation reliability due to complex component structures and assembly requirements, which lead to increased assembly man-hours and potential failure in impact absorption performance.
Innovation Solution
The intake device incorporates a torque transmission mechanism with a gear and a rotation member, featuring alternately arranged protrusions and a compressive deformation part impact absorbing member, which reduces the number of components and assembly time while maintaining effective impact absorption by changing the deformation mode from twist to compression, thus enhancing reliability and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional impact absorbing member with a twisted rubber elastic body is used, then impact absorption performance is ensured, but the number of components and assembly man-hours increase, leading to high production cost
Solution Approach 1:
The impact absorbing member is integrated directly into the transmission mechanism by positioning it between the gear and the shaft, eliminating the need for separate impact absorption components. The rubber elastic body is vulcanized-bonded to the gear and shaft, merging multiple functions into a single integrated structure that reduces component count while maintaining impact absorption capability
Solution Approach 2:
The impact absorbing member is divided into multiple rubber elastic bodies arranged circumferentially around the shaft. Each rubber elastic body independently absorbs impact forces, allowing the system to handle multiple impact directions simultaneously while using simpler individual components that are easier to manufacture and assemble
2Reliability
If a conventional impact absorbing member with vulcanized-bonded rubber elastic body is used, then impact absorption is provided, but the rubber elastic body may separate from the facing surfaces, decreasing connection strength and operation reliability
Solution Approach 1:
The rubber elastic bodies are pre-compressed between the gear and shaft during assembly, creating initial contact pressure that prevents separation during operation. This preliminary compression action ensures the rubber elastic body remains firmly bonded to the facing surfaces throughout the operational cycle, eliminating the harmful separation effect
Solution Approach 2:
The design changes the compression parameter of the rubber elastic body by positioning it in a location where it experiences continuous compressive force from the gear mesh. This parameter change from tension to compression prevents the rubber elastic body from separating, as compressed elastomeric materials maintain better contact with bonding surfaces
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 production costs and assembly time while maintaining sufficient impact absorption performance, preventing worm lock and ensuring reliable operation by effectively absorbing impulsive loads through compressive deformation, thus improving the overall efficiency and reliability of the intake device.
Implementation Method 1
The impact absorbing member includes a plurality of compressive deformation parts which are compressively deformable in the rotational direction of the transmission mechanism
Implementation Method 2
The impact absorbing member includes a plurality of compressive deformation parts which are compressively deformable in the rotational direction of the transmission mechanism
Data Source
AI summary
An intake device for an internal combustion engine includes a casing, a valve, a shaft, and an actuator. The casing defines an intake passage, and the valve is contained in the casing. The shaft supports the valve, and the actuator includes a motor, a speed reduction mechanism, and a transmission mechanism which transmits torque of the motor to the shaft from a gear of the speed reduction mechanism. The transmission mechanism includes first and second connection members which are connected to the gear and the shaft respectively, and an impact absorbing member held between the first and second connection members. The first and second connection members respectively include first and second protrusions, which are alternately arranged in a rotational direction of the transmission mechanism. The impact absorbing member includes compressive deformation parts which are deformable in the rotational direction and are respectively located between adjacent first and second protrusions.