Utility Vehicle Cargo Bed Support Rod for Cold Weather Stability
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Solution Overview
Problem
Utility vehicle cargo beds struggle to maintain a predetermined dumping position at extremely low outside temperatures due to the contraction of operating fluids in assist mechanisms, leading to a decrease in biasing force and instability.
Innovation Solution
A utility vehicle design that incorporates a support rod separate from the holding part, allowing the cargo bed to be biased and held at a predetermined position using the holding part's biasing force, with the support rod ensuring the cargo bed remains stable regardless of temperature, featuring a freely rotatable attachment to the cargo bed and a locking mechanism with crossbars and a restriction pin for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an air cylinder is used as the holding part to bias the cargo bed toward the dumping position, then the cargo bed can be held at a predetermined dumping position under normal temperature conditions, but when the outside air temperature becomes extremely low, the biasing force of the air cylinder decreases due to contraction of the operating fluid, causing the cargo bed to fail to maintain the predetermined dumping position
Solution Approach 1:
A support rod is introduced as an intermediary mechanical element to provide direct structural support for the cargo bed at the dumping position. The support rod acts as a mediator that transfers and maintains the holding force independently of temperature-sensitive fluid systems, ensuring reliable positioning even when air cylinder performance degrades in extreme cold
Solution Approach 2:
The system transitions from relying solely on pneumatic pressure (which varies with temperature) to a hybrid system that includes a mechanically-supported structure. The support rod provides a temperature-independent parameter for force application, compensating for the temperature-dependent degradation of the air cylinder's operating fluid
2Reliability
If a support rod is added to support the cargo bed at the dumping position, then the cargo bed can be held stably at the predetermined dumping position regardless of outside air temperature, but the device complexity increases due to the additional component
Solution Approach 1:
The support rod is designed with rotational freedom at one end, allowing it to dynamically adapt its angle and position as the cargo bed moves between dumping and normal positions. This dynamic capability eliminates the need for complex locking mechanisms or multiple fixed-position supports, reducing overall system complexity while maintaining reliability
Solution Approach 2:
The support rod serves multiple functions: it provides structural support at the dumping position, acts as a mechanical stop to prevent over-rotation, and can be stored within the cargo bed when not in use. This multi-functionality justifies the added component by consolidating several potential functions into a single element
Data Source
AI summary
A utility vehicle includes: a chassis (1); a seat (6) arranged on the chassis; a cargo bed (8) arranged behind the seat and supported in a freely rotatable manner about a pivot (11) of the chassis so as to be changeable between a dumping position in which a front portion of the cargo bed is raised and a normal position in which the front portion of the cargo bed is not raised; a holding part (12) for biasing the cargo bed toward the dumping position so as to hold the cargo bed; and a support rod (101) provided separately from the holding part and supporting the cargo bed at the dumping position.