Vehicle Hatch Linkage for Parallel Opening in Tight Spaces
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Solution Overview
Problem
Existing hatch operating mechanisms for vehicles, particularly buses, require significant space and effort to open and close, as they typically involve lifting and pivoting the hatch, which can be laborious and space-intensive.
Innovation Solution
A hatch operating mechanism featuring a Z-shaped arm configuration with connecting elements that move along parallel guide means, allowing the hatch to open and close in a parallel motion to the vehicle side, thereby reducing the space required for operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a classical linkage system with actuator is used to open the hatch, then the hatch can be opened and closed, but the mechanism requires significant space that reduces available luggage space
Solution Approach 1:
The hatch operating mechanism is divided into two separate arms (first arm and second arm) that can be independently positioned and controlled. Each arm can be selectively actuated based on the desired opening direction, allowing the mechanism to be compact while providing multiple opening options. The arms are segmented from a single large linkage system into smaller, space-efficient components.
Solution Approach 2:
The mechanism utilizes the third dimension (depth) by positioning the arms and connecting elements in a folded configuration that fits within the vehicle body depth. The arms can be repositioned along their respective arcs to access different spatial zones, effectively using vertical and depth dimensions to reduce the horizontal footprint of the mechanism.
2Ease of operation
If a linkage system is used to pivot the hatch, then the hatch can be opened, but a large amount of space is required for the hatch to swing outwards
Solution Approach 1:
The mechanism dynamically adapts its configuration during operation. The arms can be selectively actuated and repositioned depending on whether upward or sideways opening is desired. The connecting elements can slide along the guide means to change the effective leverage and movement path, allowing the hatch to follow different trajectories (upward arc or sideways translation) based on operational needs.
Solution Approach 2:
The opening movement is segmented into two independent phases: first arm actuation for upward movement, and second arm actuation for sideways movement. This segmentation allows the hatch to achieve complex motion paths without requiring a large single swinging arc, as each arm contributes a specific portion of the overall movement.
3Ease of operation
If the hatch is lifted and pivoted upwards to open, then the hatch can be opened, but the operation becomes laborious
Solution Approach 1:
The mechanism incorporates mechanical advantage through the arm linkages and connecting elements that counterbalance the hatch weight during opening. The arms are positioned and dimensioned to create leverage that reduces the actuation force required, effectively compensating for the hatch weight without requiring powerful actuators.
Solution Approach 2:
The connecting elements act as intermediaries between the arms and the hatch, translating the rotational movement of the arms into the desired hatch motion. These connecting elements with guide means provide a mechanical mediation that smooths the force application and reduces the effort required for direct actuation.
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 mechanism enables efficient and space-saving opening and closing of the hatch, allowing for parallel displacement and minimizing the space needed for the operating mechanism, thus maximizing storage space within the vehicle compartment.
Implementation Method 1
simultaneous rotation of the first and second arms about their first ends or shafts in predetermined, opposite directions relative to each other is arranged to cause a primary displacement of the first and second connecting elements along the guide means
Implementation Method 2
The first and second ends of the respective first and second arm extend in opposite directions, giving the arms a general Z-shape
Implementation Method 3
the connecting elements are arranged to execute a reciprocating movement along the guide means during the rotation of the first and second arms
Implementation Method 4
opposite ends of each connecting element are arranged to extend between and cooperate with a pair of spaced apart parallel guide means fixed to the hatch
Implementation Method 5
The second end of each arm can comprise an integral second shaft arranged to be rotatable relative to its connecting element about its own axis
Data Source
AI summary
A hatch operating mechanism is arranged to control opening and closing movements of a hatch covering an opening in a vehicle. The mechanism comprises a first arm and a second arm each having a first end and a second end, wherein each arm is rotatably attached to the vehicle at the first end and rotatably attached to the hatch at the second end. First and second connecting elements extend between and are displaceable relative to a pair of spaced apart, parallel guides fixed to the hatch, wherein the second ends of the arms are rotatably attached to the respective connecting elements. The first arm rotates in a first direction over a first arcuate path, and the second arm simultaneously rotates in an opposing second direction over a second arcuate path; and the first and second connecting elements are configured for reciprocating movement along the guides during rotation of the arms.