Power Unit Mounting Pin Claw Design for Collision Safety
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Solution Overview
Problem
Existing power unit mounting apparatuses in vehicles require separate bolt or nut members to prevent pin portion dislocation during collisions, increasing production costs and man-hours due to the need for screwing work.
Innovation Solution
A power unit mounting apparatus with a pin portion featuring a claw-shaped portion at its distal end, which engages with the cylindrical portion's outer edge during collisions, preventing dislocation without the need for additional parts or assembly, ensuring the pin portion remains securely inserted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate bolt or nut members are used to prevent pin portion dislocation during collisions, then the reliability of preventing pin dislocation is improved, but the device complexity and manufacturing cost increase due to additional parts and assembly steps
Solution Approach 1:
The patent combines the dislocation prevention function into the pin portion itself by adding a claw-shaped portion at the distal end. This eliminates the need for separate bolt or nut members, reducing the number of components while maintaining the reliability of preventing pin dislocation during collisions. The claw-shaped portion integrates the preventive function directly into the pin structure.
Solution Approach 2:
The pin portion is designed to be self-containing by incorporating the claw-shaped portion that automatically prevents its own dislocation. The claw engages with the cylindrical portion's outer edge during collisions, creating a self-sufficient dislocation prevention mechanism without requiring external fastening components or additional assembly steps.
2Reliability
If separate bolt or nut members are assembled to the pin portion, then the pin dislocation prevention is improved, but the manufacturing time and production efficiency deteriorate due to screwing work
Solution Approach 1:
The dislocation prevention function is merged into the pin portion structure itself through the claw-shaped portion. This eliminates the need for separate assembly operations involving bolts or nuts, thereby reducing manufacturing time and improving production efficiency while maintaining reliable pin dislocation prevention.
Solution Approach 2:
The pin portion with the integrated claw-shaped portion provides self-service dislocation prevention without requiring external fastening operations. The claw automatically engages with the cylindrical portion during collisions, eliminating screwing work and associated assembly time.
3Ease of manufacture
If only press fitting is used to secure the pin portion, then the ease of manufacture is improved, but the reliability during collision deteriorates due to early pin dislocation
Solution Approach 1:
The claw-shaped portion is preliminarily formed at the distal end of the pin portion during manufacturing. This preliminary structural preparation ensures that when collision occurs, the claw is already positioned to engage with the cylindrical portion's outer edge, preventing dislocation without requiring complex assembly operations or sacrificing press-fitting simplicity.
Solution Approach 2:
The pin portion is designed with local quality variation: the main body allows simple press fitting for ease of manufacture, while the distal end features a claw-shaped portion that provides enhanced retention during collision. This localized structural modification maintains manufacturing simplicity while improving collision reliability.
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
The claw-shaped design effectively prevents early dislocation of the pin portion during collisions, controlling the timing of power unit detachment and reducing production costs by eliminating the need for separate components and assembly work.
Implementation Method 1
vibration transmitted through the pin portions is absorbed by the insulators so as to suppress the transmission of vibration from the power unit to the vehicle body side
Implementation Method 2
an insulator elastically supporting the pin portion
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The present invention provides a power unit mounting apparatus which can prevent the dislocation of a pin portion from the inside of a cylindrical portion in an early stage of collision when a vehicle is involved in a collision by a simple and inexpensive construction. A power unit mounting apparatus of the invention is configured so that a claw-shaped portion 25 is formed at a distal end portion of a pin portion 18 which is press fitted in a cylindrical portion 14 of an insulator 11 in such a way as to be situated further transversely outwards than the cylindrical portion 14 with the pin portion 18 press fitted in the inside of the cylindrical portion 14, whereby when a vehicle is involved in a collision, causing the pin portion 18 and the insulator 11 to be displaced relatively in directions in which they are separated from each other, the claw-shaped portion 25 is brought into locking engagement with a transversely outboard edge portion of the cylindrical portion 14. By adopting this configuration, when the vehicle is involved in the collision, causing the pin portion and the insulator to be displace relatively in the directions in which they are separated from each other, the claw-shaped portion 25 formed at the pin portion 18 is brought into locking engagement with the transversely outboard edge portion of the cylindrical portion 14 to thereby prevent the pin portion 18 from being dislocated from the inside of the cylindrical portion 14 in an early stage of the collision, whereby a power unit 5 is prevented from coming off in the early stage of the collision.