Rear Mount Structure for Off-Road Vehicles
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Solution Overview
Problem
Conventional rear mount structures for engines in vehicles increase the length and weight of the rear mount member, reducing rigidity and ground height, which limits off-road performance and design flexibility due to the fixed mounting on side frames, causing vibrations to be transmitted to the vehicle body.
Innovation Solution
A rear mount structure where a pair of side frames are mounted on the lower surface of a floor panel, with a tunnel projecting between seats, and seat rails extending longitudinally, allowing the rear mount member to be connected to brackets that are welded to the side frames and floor panel, enhancing rigidity and increasing ground height by positioning the rear mount member higher than the side frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the rear mount member is fixed to the side frames, then the mounting structure is simple, but the length and weight of the rear mount member are increased and rigidity is deteriorated
Solution Approach 1:
The patent changes the mounting arrangement from a longitudinal configuration (mounting to side frames) to a lateral configuration (mounting to transverse members). This dimensional change allows the rear mount member to be positioned higher, reducing its length and weight while maintaining structural integrity and rigidity.
2Stability of the object's composition
If the rear mount member is fixed to the side frames, then the mounting structure is stable, but the ground height is reduced
Solution Approach 1:
The patent transitions from longitudinal mounting (affecting vertical space) to lateral mounting (utilizing transverse members), which repositions the rear mount member higher in the vehicle structure. This dimensional shift increases ground height while maintaining mounting stability through rigid connections to transverse members.
Solution Approach 2:
Instead of mounting the rear mount member to the side frames from below, the patent inverts the approach by mounting it to transverse members that extend laterally, allowing the mount member to be positioned at a higher elevation without compromising stability.
3Device complexity
If the rear mount member is positioned lower to connect to side frames, then the structure is simplified, but the design flexibility for off-road vehicles is deteriorated
Solution Approach 1:
The patent employs lateral mounting through transverse members, which provides vertical adjustment flexibility. This allows the rear mount member to be positioned at optimal heights for off-road performance while maintaining structural simplicity through standardized mounting interfaces.
Solution Approach 2:
The transverse members serve multiple functions: they provide mounting surfaces for the rear mount member, maintain structural rigidity, and allow for vertical positioning adjustments. This multi-functionality enhances design flexibility for different vehicle applications including off-road vehicles.
Data Source
AI summary
A seat front member and a seat rear member are connected to each other through left and right seat rails. The seat front member and the seat rear member are disposed on an upper surface of a floor panel. An outer end of a bracket is joined to an inner side of a side frame and an upper end of the bracket is joined to the under surface of the floor panel. The bracket is disposed on a region wherein, the bracket is sandwiched between the seat front member and the seat rear member. A lower surface of the bracket is disposed a higher distance from the ground than a lower surface of the side frame. A rear mount member is rigidly coupled to a lower surface of the bracket and a lower surface thereof is disposed at a higher distance from the ground than the side frame.