Armored Vehicle Seat Pivot Mechanism for Shock Isolation
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Solution Overview
Problem
Armored vehicle seats face challenges in isolating occupants from severe shocks caused by mine or IED explosions, as existing solutions either absorb shocks inadequately or decouple the seat from the floor, leading to excessive acceleration-induced injuries.
Innovation Solution
A seat design featuring a backrest secured to the vehicle's wall or ceiling, with a pivoting mechanism that allows the seat to transition from a folded to an unfolded position, utilizing stop surfaces and metal plate supports that deform under predetermined forces to release the seat and prevent excessive shock transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a deformable structure is introduced between the floor and seat to absorb shocks, then shock absorption is improved, but device complexity worsens
Solution Approach 1:
Instead of placing the deformable absorption mechanism between the floor and seat as in prior art, the invention inverts the approach by securing the backrest to the ceiling or side wall and allowing the seat to pivot dynamically. The absorption of excessive shocks is achieved through the pivoting and release mechanism rather than through a deformable interstitial structure, thereby simplifying the overall design.
2Stability of the object's composition
If the seat is rigidly connected to the backrest to ensure stability, then structural stability is improved, but shock transmission to the occupant worsens
Solution Approach 1:
The connection between seat and backrest is made dynamic through the pivoting mechanism with defined stops. The seat can pivot about a vertical axis and is stopped at a predetermined unfolded position during normal operation, providing structural stability. However, under excessive shock forces, the stop mechanism releases, allowing the seat to pivot beyond the stopped position and thereby protecting the occupant from shock transmission.
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 design effectively limits the shock level experienced by the occupant to that required to release the seat, reducing the risk of injury by allowing the seat to pivot beyond its unfolded position, thereby minimizing exposure to critical shock forces.
Implementation Method 1
the plate has a profile such that a force of a certain level exerted on the seat causes the plate to deform, pushing the rim away from the abutment
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The subject of the invention is a seat (1) for an armoured vehicle, the seat comprising a backrest (2) secured to a wall or to the roof (4) of the vehicle and a sitting part (3) pivot-mounted with respect to the backrest (2) between a folded position in which it is substantially parallel to the backrest and an unfolded position in which it is in abutment and is substantially perpendicular to the backrest (2). This seat is characterized in that the sitting part (3) is connected to the backrest (2) by a connecting means (6, 8) which, under load of a predetermined magnitude, releases the abutment stop (8) of the sitting part and allows the latter to pivot beyond the unfolded position.