Monoblock Rack and Pinion Gear Alignment
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Solution Overview
Problem
Existing high-voltage switch technologies face issues with one-sided loading, wear, and misalignment due to complex assembly and adjustment requirements in rack-and-pinion drives, particularly in auxiliary gears with multiple components and external tie rods.
Innovation Solution
A monoblock design integrates mounting and guide means for the rack-and-pinion drive within a single assembly, reducing component count and simplifying assembly, with a single gear wheel and rack configuration that eliminates the need for adjusting screws and external tie rods, and includes a carrier sliding guide to prevent tilting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-component auxiliary gear assembly with separate mounting plate and guide block is used, then the rack and pinion drive can be implemented, but the assembly complexity increases and alignment precision becomes difficult to maintain
Solution Approach 1:
The patent combines the mounting plate and guide block into a single integrated monoblock structure. This merging eliminates the need for separate assemblies that must be independently aligned, thereby reducing assembly complexity while maintaining alignment precision. The monoblock design ensures that the mounting means and guide means are precisely positioned relative to each other by default, eliminating alignment errors that would occur with separate components.
2Manufacturing precision
If multiple adjusting screws and external tie rods are used for alignment, then the rack and pinion drive can be adjusted, but the device complexity and number of components increases
Solution Approach 1:
The monoblock design integrates all alignment and mounting functions into a single component, eliminating the need for multiple adjusting screws and external tie rods. The integrated structure provides inherent alignment through its manufacturing precision, removing the need for field adjustment mechanisms and reducing the total component count.
Solution Approach 2:
The monoblock structure is self-aligning by design, requiring no external adjustment mechanisms. The integrated mounting and guiding features automatically ensure proper alignment when installed, eliminating the need for separate adjustment operations and reducing the number of parts that could fail or require maintenance.
3Device complexity
If a one-sided rack and pinion drive is used, then the auxiliary gear structure is simplified, but loading becomes unbalanced and wear increases
Solution Approach 1:
The patent employs a symmetrical double-sided rack and pinion drive configuration where two gear wheels are positioned on opposite sides of the contact pin, each engaging with its own rack. This symmetrical arrangement balances the loading on the contact pin during operation, preventing the unbalanced loading and excessive wear that would occur with a one-sided drive, while maintaining reasonable structural complexity.
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 design simplifies the assembly and adjustment of the auxiliary gear, enhances reliability, and prevents tilting of arcing contact pieces, while maintaining precise alignment and structural integrity, thereby improving the operational efficiency and longevity of high-voltage switches.
Implementation Method 1
an insulating material nozzle (4) for blowing out an arc
Implementation Method 2
the auxiliary gear (5) having mounting means (5a) and guide means (5b) for a rack and pinion drive (6 to 8)
Data Source
Figure 1~2
AI summary
The unit has a contact system (2) with an insulant injector (4) for electric arc blowing. Another contact system (3) and the former contact system are driven by an auxiliary gearbox. The gearbox has a mounting unit (5a) and a guiding unit (5b) for a pinion (6) and gear racks (7, 8). The gearbox includes a mono-block (5), in which the mounting and the guiding units are integrated for the pinion and the gear racks. The mono-block has sliding guides (9, 11) and a sliding contact (10) for an electric arc contact piece (3a) that is driven by the gearbox. An independent claim is also included for a method for assembling a switchgear with an interrupter unit.