Resilient Rear Protection Rod for Electric Machine Impact Isolation
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Solution Overview
Problem
Existing rear underrun protection bars in vehicles primarily protect against smaller vehicles lodging under the truck but do not adequately safeguard rear-mounted electric machines from impacts, especially when reversing or operating in uneven terrain.
Innovation Solution
A rear protection rod with resilient members, such as rubber bushings or ball joints, is attached between the left and right sides of the vehicle below or behind the electric machine, allowing lateral movement and providing impact protection without stiffening the vehicle's frame or suspension, and can be telescopic to adapt to different positions and movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid rear underrun protection bar is fixedly attached to the frame, then protection against smaller vehicles lodging under the truck is improved, but the vehicle's natural movements and suspension flexibility are impaired
Solution Approach 1:
The protection bar is transformed from a rigid fixed structure to a dynamic system with resilient members (rubber bushes or ball joints) that allow relative movement between the protection bar and vehicle frame, enabling the bar to move laterally and accommodate suspension movement while maintaining protection function
Solution Approach 2:
Resilient members (rubber bushes or ball joints) are introduced as intermediary elements between the protection bar and vehicle frame, serving as mediators that transmit forces while allowing controlled movement and decoupling the rigid connection
2Reliability
If a fixed rear protection structure is attached to the frame, then impact protection is improved, but unwanted stiffening of frame, suspension or axle occurs
Solution Approach 1:
The protection structure is made dynamic through resilient members that allow controlled movement, preventing the transmission of rigid constraints to the vehicle frame and suspension while maintaining impact protection capability
Solution Approach 2:
Resilient members serve as intermediaries that absorb and dissipate impact energy through deformation, preventing direct force transmission to the vehicle frame and avoiding unwanted stiffening
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 rear protection rod effectively safeguards electric machines from rear and lower impacts, reducing damage risk while maintaining vehicle mobility and flexibility, especially in heavy-duty vehicles like trucks and construction equipment.
Implementation Method 1
The rear protection rod is arranged to be attached between a left side and a right side of the vehicle behind and/or below an electric machine mounted on a rear end part of the vehicle. The first end is arranged to be attached to the left side of the vehicle with a first resilient member and the second end is arranged to be attached to the right side of the vehicle with a second resilient member
Data Source
AI summary
A rear protection rod for a vehicle. The rear protection rod comprises a first end and a second end. The rear protection rod is arranged to be attached between a left side and a right side of the vehicle behind and/or below an electric machine mounted on a rear end part of the vehicle. The first end is arranged to be attached to the left side with a first resilient member and the second end is arranged to be attached to the right side with a second resilient member such that the electric machine is protected from rear impacts.