Rail Vehicle Front Hatch Pivoting Mechanism
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Solution Overview
Problem
Existing mechanisms for pivoting front flaps on rail vehicles are complex, prone to high friction, and often result in visible gaps, which compromises weather protection and aerodynamics, while also being costly and difficult to maintain.
Innovation Solution
A simplified kinematics system involving a carrier element connected to both the front hatch and the vehicle underframe, with a displacement mechanism for minimal friction and a locking device for secure positioning, utilizing pneumatically, hydraulically, or electrically controllable actuating cylinders and a spring plunger for robustness, and a horizontal guide for weight distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a complex front hatch kinematics is used to pivot the front hatch, then the front hatch can be opened and closed, but the device complexity increases and friction occurs
Solution Approach 1:
The front hatch system is divided into separate functional components: the front hatch itself, the carrier element that supports it, and the actuating element that provides motion. This segmentation allows each component to be optimized independently, reducing overall complexity while maintaining functionality.
Solution Approach 2:
The carrier element acts as an intermediary between the front hatch and the actuating element. It simplifies the kinematic chain by providing a direct pivot connection to the vehicle underframe, eliminating the need for complex intermediate mechanisms and reducing friction points.
2Device complexity
If the front hatch is pivoted directly by the actuating element, then the structure is simple, but friction and wear increase
Solution Approach 1:
The carrier element serves as a mediator that distributes and manages the mechanical loads and friction between the actuating element and the front hatch. By providing a dedicated pivot connection to the vehicle underframe, it reduces wear on critical components and improves reliability.
3Device complexity
If the front hatch remains in contact with the front nose module during opening, then the structure is simple, but gaps and friction occur
Solution Approach 1:
The displacement mechanism performs a preliminary action by moving the front hatch away from the front nose module in the longitudinal direction before the pivoting motion begins. This preliminary separation prevents friction and gap formation during the subsequent pivoting operation, while maintaining a relatively simple overall structure.
4Weight of moving object
If lightweight bearings are used for the carrier element, then weight is reduced, but load-bearing capacity may be compromised
Solution Approach 1:
The horizontal guide provides a counterbalancing support function by distributing the weight of the front hatch and carrier element assembly. This allows the use of lighter bearing components while maintaining adequate load-bearing capacity through the combined support system of the guide and bearings.
Data Source
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Figure 3a
AI summary
The invention relates to a device for pivoting one or more front flaps (1a, 1b) of a track-guided vehicle, in particular rail vehicles. In order to ensure that the opening and closing of the front flap can be implemented as far as possible without friction and without visible joints, the invention provides that the device has at least one carrier element (2) which is connected, on the one hand, to the front flap (1a, 1b) and on the other hand, to the vehicle underframe,wherein the carrier element (2) can be pivoted in the horizontal plane relative to the vehicle underframe, and is designed to change, during the pivoting, the front flap (1a, 1b) from closed state into an opened state, and vice versa. In addition, the device has an activation element (3) which is connected, on the one hand, on to the at least one carrier element (2) and, on the other hand, to the vehicle underframe, in order to pivot the at least one carrier element (2) relative to the vehicle underframe. The at least one carrier element (2) has a shift mechanism which is designed to shift the front flap (1a, 1b), in particular in the closed state, in the longitudinal direction of the carrier element (2).