Piston Rod Assembly with Rotational Locking Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing combinations of pistons and connecting rods in internal combustion engines require complex assembly processes and significant assembly effort, often involving multiple screw connections and separate securing elements, which increases weight and assembly time.
Innovation Solution
A piston and connecting rod combination where the connecting rod is secured in a form-fitting manner within the piston's bearing seat by rotating it 90°, eliminating the need for separate safety elements and simplifying assembly, with a design that includes a part-spherical connecting rod head and a bearing seat with a central through-opening for secure rotation and pivoting, and a gap in the piston skirt for reduced weight and improved lubrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate locking elements and multiple screw connections are used to secure the connecting rod in the piston bearing receptacle, then the reliability of the connection is improved, but the assembly effort and device complexity increase significantly
Solution Approach 1:
The patent merges the connecting rod head geometry with the bearing receptacle structure itself to create an integrated locking mechanism. The connecting rod head is designed with a specific shape that directly engages with corresponding features in the bearing receptacle, eliminating the need for separate locking elements and multiple screw connections while maintaining secure attachment.
Solution Approach 2:
The invention extracts and eliminates unnecessary separate locking elements from the assembly. By redesigning the connecting rod head and bearing receptacle to work together as an integrated system, the patent removes redundant components that previously were needed for securing the connection, thereby simplifying the overall device.
2Strength
If multiple screw connections are used to connect the piston top and piston bottom, then the structural strength is improved, but the assembly effort and time increase considerably
Solution Approach 1:
The patent merges the connection mechanism for the piston top and piston bottom into a simplified integrated structure. By designing the piston components to work together with inherent geometric interlocking features, the invention eliminates the need for multiple screw connections while maintaining the required structural strength, thereby significantly reducing assembly time.
3Stability of the object's composition
If traditional piston designs without gaps are used, then the structural integrity is maintained, but the weight increases and thermal resistance decreases
Solution Approach 1:
The patent applies local quality by introducing a gap in specific regions of the piston structure where it does not compromise overall integrity. The gap is strategically positioned to reduce weight and improve thermal characteristics, while the surrounding structural elements maintain the necessary strength and stability for piston operation.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a combination of a piston (10) and a rod (12) pivotably mounted in a bearing receptacle (44) of the piston (10), wherein the piston (10) comprises a piston upper part (14) forming the piston crown (24) and a piston lower part (16) forming at least one section of the piston skirt (22), which are connectable in the context of an assembly of the combination, and wherein a rod head (34) of the rod (12) can be inserted in a first rotational direction into the bearing receptacle (44), and is secured against a loosening out of the bearing receptacle (44) in a second rotational direction rotated by an angular distance about the longitudinal axis (52) of the rod (12), characterized in that, after the assembly of the combination, the rod (12) is secured against a rotation out of the second rotational direction into the first rotational direction by means of the piston lower part (16) connected to the piston upper part (14). In this way, in particular, a simple assembly can be carried out for the combination of piston and rod.