Rear Bumper Support With Cantilever Reinforcement
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Solution Overview
Problem
Existing bumper support systems in vehicles transmit forces to the structure during collisions, compromising the dissipation of impact energy and pedestrian safety due to the intrusion of the shock absorption beam with the fixing foot, which should be minimized.
Innovation Solution
The bumper support system incorporates a cantilever assembly with a reinforcing element that maintains vertical rigidity by resting on the shock absorption beam, eliminating the need for a strut and positioning the fixing leg outside the beam's intrusion path, allowing for reduced thickness and deformation of the foot, thereby minimizing force transmission to the vehicle structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the beam is arranged to be placed under the support part and behind the latter, then the beam can absorb shock during collision, but the beam touches the foot for fixing and supporting the support part during intrusion stroke, transmitting forces to the structure
Solution Approach 1:
The invention extracts the force transmission path by removing the foot from the intrusion path of the beam. The support part is configured to be supported directly by the structure at a location that the beam does not contact during intrusion, thereby separating the shock absorption function from the support function and preventing force transmission to the structure.
Solution Approach 2:
The invention introduces an intermediary support configuration where the support part is directly supported by the structure at a location outside the beam's intrusion path. This intermediary support arrangement allows the beam to absorb shock without transmitting forces to the structure through the foot, as the foot is no longer in contact with the beam during intrusion.
2Strength
If the foot is made thicker to provide better support, then vertical rigidity is improved, but the foot occupies more space and may interfere with beam intrusion
Solution Approach 1:
The invention extracts the foot from the intrusion path of the beam, allowing the foot to be thinner since it no longer needs to provide support during beam intrusion. The support function is transferred to a different location on the structure that is not contacted by the beam during collision.
Solution Approach 2:
The invention changes the spatial arrangement by positioning the support location in a different dimension relative to the beam's intrusion path. The support part is supported by the structure at a location that is spatially separated from the beam's path, allowing the foot to be thinner without compromising vertical rigidity.
3Volume of moving object
If the foot is deformed to reduce thickness, then space for beam intrusion is increased, but vertical support capability may be compromised
Solution Approach 1:
The invention extracts the vertical support function from the foot by positioning the support location outside the beam's intrusion path. The foot can be deformed to reduce thickness since the vertical support capability is maintained through the direct structural support at the repositioned location.
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 enhances the absorption of impact forces while maintaining vertical rigidity and reducing the risk of force transmission to the vehicle structure, ensuring improved safety and efficiency in energy dissipation during collisions.
Implementation Method 1
the support elements 9 then deform by a more pronounced inclination under the effect of the pressure exerted by the bumper skin. The volume formed by the support elements 9 is compressed.
Implementation Method 2
the support elements 9 then deform by a more pronounced inclination under the effect of the pressure exerted by the bumper skin
Implementation Method 3
in the event of a collision, the beam 17 will absorb the shock and move in the direction of the structure 3 of the vehicle
Data Source
Figure 1~2b
Figure 3~4b
Figure 5~6b
AI summary
The invention relates to a support part (21) for a bumper intended to form part of a shock absorbing system which further comprises at least one shock absorbing beam (17) and a bumper skin (19) intended to cover the beam (17) and the support part (21), characterised in that it comprises at least one reinforcing element (31) which deforms under longitudinal stress but is rigid under vertical stress, connected to the base (23) by one of the ends of same and sized to extend so as to place the other end of same, referred to as terminal, above the shock absorbing beam (17) so as to be able to bear thereon from above if necessary.