Vehicle Pedal Device Reference Shaft Positioning
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Solution Overview
Problem
The existing pedal device for vehicles has a concern that the base member supporting the accelerator pedal pad may be offset from its designed position due to clearances between the through-holes and bolts, leading to potential dispersion in the relative positions of the pedal pads when fixed to the supporting members.
Innovation Solution
A pedal device design that incorporates a reference shaft member with a smaller first clearance, which intersects the accelerator pedal pad, and a shaft member with a larger second clearance for fixing, allowing the base member to rotate relative to the supporting member while maintaining the position of a predetermined region of the pedal pad, ensuring it is not greatly offset from the designed position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If clearances are formed between through-holes and bolts for fixing the base member, then the base member can be easily assembled and accommodated, but the relative position of the accelerator pedal pad may be offset from the designed position
Solution Approach 1:
The patent divides the fixing mechanism into two separate functional components: through-holes with large clearances for easy positioning and assembly, and reference holes with small clearances for precise position determination. This segmentation allows each component to fulfill its specific function optimally without compromise.
Solution Approach 2:
The patent implements preliminary action by first allowing the base member to be positioned and temporarily fixed using the through-holes with large clearances, and then subsequently determining the precise position using the reference holes with small clearances. This two-stage process ensures both ease of assembly and position accuracy.
2Ease of operation
If large clearances are formed between shaft members for fixing and through-holes, then the base member can rotate relative to the supporting member for easy installation, but the position of the accelerator pedal pad may disperse
Solution Approach 1:
The patent segments the clearance function into two distinct systems: large clearances in through-holes for installation flexibility and rotation, and small clearances in reference holes for position stability. This segmentation resolves the contradiction between ease of installation and position stability.
Solution Approach 2:
The reference holes act as an intermediary mechanism that mediates between the flexible positioning provided by through-holes and the stability requirement for the accelerator pedal pad position. The reference holes with small clearances ensure stable position determination after the base member is initially installed.
Data Source
AI summary
A pedal device for a vehicle includes: a pedal pad; a single reference hole formed in one of a base member and a supporting member comprising at least one of a panel or a bracket; a through-hole for fixing that is formed in the base member; a reference shaft member that is supported by the other of the base member or the supporting member, and is inserted into the reference hole while forming a first clearance between the reference shaft member and the reference hole, and whose extension line intersects the pedal pad; and a shaft member for fixing that is inserted into the through-hole for fixing while forming a second clearance that is larger than the first clearance between the shaft member for fixing and the through-hole for fixing, and that fixes the base member to the supporting member by being fixed to the supporting member.