Chain Sprocket Axial Adjustment Without Spacer Disassembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for axial fine adjustment of free-running chain wheels in chain drives of round balers are time-consuming and impractical, requiring frequent assembly and disassembly of sprockets and spacer discs.
Innovation Solution
A device with a stop formed on the bearing journal and a spring element between the rotary bearing and the stop, along with prestressing means, allows for precise axial displacement of the rotary bearing by adjusting the prestressing force, eliminating the need for spacer discs and reducing the complexity of assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If spacers are used for axial fine-tuning of free-running sprockets, then alignment precision is improved, but assembly complexity and time consumption increase
Solution Approach 1:
The invention extracts the adjustment function from the sprocket assembly itself and relocates it to the bearing journal. By providing threading and adjustable stops on the journal, the alignment adjustment is separated from the sprocket, allowing the sprocket to remain fixed while the bearing position is adjusted. This eliminates the need for spacers and repeated assembly/disassembly operations.
Solution Approach 2:
The bearing journal acts as an intermediary component that enables axial adjustment of the rotary bearing and sprocket assembly. The threaded structure and adjustable stops on the journal serve as mediating mechanisms, allowing precise control of the bearing's axial position without modifying the sprocket or requiring spacer components.
2Manufacturing precision
If repeated assembly and disassembly of sprockets is performed for fine-tuning, then alignment precision is improved, but time consumption increases
Solution Approach 1:
The bearing journal is pre-equipped with threading and adjustable stop structures during manufacturing. This preliminary preparation allows for direct axial adjustment of the rotary bearing without requiring disassembly of the sprocket or installation of spacer components, significantly reducing adjustment time while maintaining precision.
3Device complexity
If conventional chain drive design is used, then structural simplicity is maintained, but axial adjustability of free-running sprockets is limited
Solution Approach 1:
The invention transforms the static bearing journal into a dynamic adjustment mechanism by incorporating threading and adjustable stops. This allows the journal to actively control the axial position of the rotary bearing and sprocket assembly, providing adaptability for alignment fine-tuning while maintaining the overall simplicity of the chain drive structure.
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
This solution enables independent axial fine adjustment of the sprocket without disassembling the sprocket or rotary bearing, simplifying the process and reducing time, allowing for precise alignment without the need for spacer discs.
Implementation Method 1
at least one spring element (94) is arranged between the rotary bearing (74) and the stop (82)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A device (70) for adjusting a sprocket (58, 60, 62, 64, 66, 68) of a chain drive (40, 44, 48) is proposed. The device (70) comprises a bearing journal (72) having a free end (76) and a fixed end (78), a rotary bearing (74) arranged on the bearing journal (72), and a sprocket (58, 60, 62, 64, 66, 68) guided on the rotary bearing (74). A stop (82) is formed on the bearing journal (72), and at least one spring element (94) is arranged between the rotary bearing (74) and the stop (82), with preloading means (107) being provided which preload the rotary bearing (74) against the spring element (94). Furthermore, a chain drive (40, 44, 48) for driving press rollers (24, 26) or press belts of a round baler (10) for pressing crops, with at least one such device (70) and a round baler (10) with such a chain drive (40, 44, 48) is proposed.