Hinge Pin with Recessed Frame Flange for Commercial Vehicle
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Solution Overview
Problem
Existing hinge pins for commercial vehicle bodies are permanently connected to the outer frame, preventing easy installation or retrofitting, especially after the frame has been painted, and require complex constructions for customs security.
Innovation Solution
A hinge pin design featuring a bolt part with a frame flange that includes an extension with a recess for engaging the outer frame, allowing for secure attachment using a connecting element like a screw or rivet, and a mechanism that blocks tilting to prevent removal, ensuring customs security without welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hinge pin is permanently connected to the outer frame by welding, then customs security is guaranteed, but the hinge pin cannot be installed later or retrofitted after the outer frame has been painted
Solution Approach 1:
The hinge pin is divided into separate components: the pin body with frame flange and the outer frame, connected by a removable connecting element rather than permanent welding. This allows the hinge pin to be installed after the outer frame is painted while still providing secure connection.
Solution Approach 2:
The recess is pre-formed in the outer frame at the correct position and orientation, allowing the frame flange to be aligned and connected without requiring subsequent adjustments or modifications after painting.
2Reliability
If the hinge pin is made with a complex bearing part construction, then customs security is achieved, but the device complexity increases
Solution Approach 1:
The customs security function is extracted from the complex bearing part construction and implemented through the simple geometric configuration of the recess and frame flange, which mechanically prevent unauthorized removal without requiring complex components.
Solution Approach 2:
Instead of using complex bearing parts to achieve customs security, the invention inverts the approach by using a simple recess geometry that actively prevents removal attempts, making the security function inherent in the basic structure rather than added through complexity.
3Ease of operation
If the hinge pin uses a screw connection for assembly, then easy assembly and disassembly is achieved, but the risk of unauthorized loosening increases
Solution Approach 1:
The frame flange is nested within the recess of the outer frame, creating a geometric interlock that prevents unauthorized loosening or removal. The connecting element secures this nested configuration, combining easy assembly with reliable anti-loosening protection.
Data Source
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AI summary
The pin has a pin part (10) connected with a frame flange (20) whose internal surface (22) is attached to an external frame in an assembled condition of the pin. An extension (23) is arranged at the internal surface of the flange and has a free end (24). A recess (25) is formed between the free end and the internal surface. The recess is adapted such that the external frame engages the recess in the assembled condition. An unit is attached to the extension and is an opening of a connecting element for connecting the frame flange with the external frame. Independent claims are also included for the following: (1) a hinge comprising a retaining part (2) a commercial vehicle comprising an external frame.