Pantograph Deflection Limiter With Pivoting Stop Mechanism
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Solution Overview
Problem
Current deflection limiting devices for pantographs in rail vehicles require significant installation space and actuation force, and often involve complex interlocking parts that complicate assembly, maintenance, and operation.
Innovation Solution
A compact deflection limiting device with a pivoting element and a contact element, where the pivoting element is rotatable about a longitudinal or vertical axis, forming a stop for the contact element, and actuated by a pneumatic or hydraulic system, allowing for adjustable deflection limits without the need for telescopic interlocking parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional telescopic interlocking parts (catch lever and catch bracket) are used for deflection limiting, then the deflection can be limited, but the installation space requirement increases and the device complexity increases
Solution Approach 1:
The deflection limiting device is segmented into two independent functional elements: a pivoting element connected to the bearing device and a contact element fixed to the lower arm. This segmentation eliminates the need for complex telescopic interlocking parts while maintaining the deflection limiting function. The pivoting element can rotate independently to form a stop, reducing the space required compared to traditional telescopic mechanisms.
Solution Approach 2:
Instead of using a telescopic mechanism where parts extend and interlock, the invention inverts the approach by using a pivoting element that rotates to form a stop. The contact element remains fixed while the pivoting element moves, creating a simpler geometric relationship that reduces installation space requirements while achieving the same deflection limiting effect.
2Reliability
If traditional telescopic interlocking parts are used for deflection limiting, then the deflection can be limited, but the device complexity and number of parts increases
Solution Approach 1:
The device is divided into two simple segmented components: a pivoting element with rotation capability and a contact element. This segmentation reduces the number of parts compared to traditional telescopic mechanisms while maintaining functional reliability. Each segment has a clear, simple function that contributes to the overall deflection limiting capability.
Solution Approach 2:
The invention inverts the traditional approach by using a fixed contact element and a movable pivoting element rather than two movable telescopic parts. This inversion simplifies the device structure, reduces the number of components, and eliminates complex interlocking mechanisms while preserving the deflection limiting function.
3Reliability
If traditional stainless steel milled catch levers are used, then the deflection can be limited, but the actuation force requirement increases
Solution Approach 1:
The contact element can be designed as a simple laser-cut tab welded to the lower arm, replacing expensive stainless steel milled catch levers. This simpler, lighter component requires less actuation force while maintaining the deflection limiting function. The simplified geometry reduces material usage and manufacturing complexity.
Solution Approach 2:
Instead of using heavy-duty telescopic catch levers that require significant actuation force, the invention inverts to a lighter pivoting element that rotates to form a stop. This inverted approach reduces the mass and complexity of the moving parts, thereby reducing the actuation force required while maintaining reliable deflection limiting.
4Reliability
If telescopic interlocking parts are used for deflection limiting, then the deflection can be limited, but the assembly, maintenance, and operation becomes more complicated
Solution Approach 1:
The segmented design with a pivoting element and contact element simplifies assembly and maintenance compared to telescopic interlocking parts. Each segment can be independently installed, adjusted, and maintained. The pivoting element's rotation capability allows for easy engagement and disengagement, facilitating simpler operation and maintenance procedures.
Solution Approach 2:
The inverted design with a fixed contact element and pivoting stop eliminates the complexity of telescopic interlocking mechanisms. This simplification makes assembly more straightforward, reduces maintenance requirements, and improves operational ease while maintaining the deflection limiting function.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a current collector for a rail vehicle with a current collector linkage coupled to a bearing device (2) and with a deflection limiting device, wherein the current collector linkage has a deflectable lower arm (1) which is rotatably connected to the bearing device (2). It is proposed that the deflection limiting device comprises a pivoting element (4) and a contact element (5), wherein the pivoting element (4) is rotatably connected to the bearing device (2) at least about a first parallel to a longitudinal axis (3) of the bearing device (2) or at least about a second parallel to a vertical axis (32) of the bearing device (2), wherein the contact element (5) is fixedly connected to the lower arm (1), and wherein the pivoting element (4) is rotatable into a position in which the pivoting element (4) forms a stop for the contact element (5).This results in a space-saving deflection limiting device with moderate operating force requirements.