Split Pinion Transmission for Radial Driveshaft Installation
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Solution Overview
Problem
Existing rack and pinion gear systems require disassembly of supporting parts and access to one end of the drive shaft for installation or replacement, limiting their versatility and ease of use, especially in fully assembled systems.
Innovation Solution
A transmission device with a base body that encloses the drive shaft and features a modular pinion design, allowing radial assembly and integration of a sliding bearing, enabling installation without axial access to the drive shaft, and using overlapping pinion parts with teeth for secure, screwless assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional pinion and housing are mounted by axially sliding onto the drive shaft, then the assembly is simple, but access to one end of the drive shaft is required and the drive shaft must be disassembled
Solution Approach 1:
The pinion is divided into multiple segments that can be assembled radially onto the drive shaft. Each pinion segment can be independently positioned and assembled, allowing installation at any location along the drive shaft without requiring axial access or disassembly of the drive shaft.
Solution Approach 2:
The assembly direction is changed from axial (one-dimensional) to radial (two-dimensional). The pinion segments are assembled by moving radially inward toward the drive shaft axis, enabling installation without access to the drive shaft ends and eliminating the need to disassemble supporting parts.
2Adaptability or versatility
If the pinion is made in several parts for radial assembly, then installation flexibility is improved, but the device complexity increases
Solution Approach 1:
The pinion is segmented into multiple parts that can be assembled radially. The segments are designed with complementary features that simplify the assembly process, and the modular structure allows for easier maintenance and replacement of individual segments without replacing the entire pinion.
Solution Approach 2:
The pinion segments are designed to nest together radially, with each segment fitting into the space between the drive shaft and the previous segment. This nested arrangement minimizes the overall radial space required and simplifies the assembly sequence.
3Ease of manufacture
If the base body is made of plastic with an integrated sliding bearing, then manufacturing cost is reduced, but the bearing capacity must be sufficient for the application
Solution Approach 1:
The sliding bearing is integrated directly into the plastic base body, eliminating the need for separate bearing components. The bearing surface is formed as part of the base body molding process, reducing part count and assembly steps while maintaining adequate load-bearing capacity for the application.
Solution Approach 2:
The base body uses plastic material with properties optimized for both structural support and bearing function. The plastic material is selected or formulated to provide sufficient friction resistance and load-bearing capacity while maintaining the cost advantages of plastic manufacturing.
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
Facilitates easy retrofitting or replacement of rack and pinion gears at any location within a fully assembled system, reducing manufacturing and assembly costs while ensuring secure, force-locking connections, and eliminating the need for additional bearing parts.
Implementation Method 1
The bearing section is preferably designed as a sliding bearing
Implementation Method 2
the bearing surface comprises a plastic part that is preferably attached directly to the base body
Implementation Method 3
a pinion that is arranged in the base body and on the drive shaft when assembled and includes a rack that interacts with the pinion
Data Source
Figure 1
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Figure 3
AI summary
The invention relates to a transmission device for installing on a driveshaft (1), comprising a main part (2, 27) which surrounds the driveshaft (1), a pinion (20, 28) which is arranged in the main part (2, 27) and on the driveshaft (1) in the mounted state, and a rack (19) which interacts with the pinion (20, 28) and runs through the main part (2, 27). The transmission device is characterized in that the main part (2, 27) is open on one side such that the main part can be pushed onto a driveshaft (1) in a radial direction, and the pinion (20, 28) is designed in multiple parts such that the pinion can be assembled on the driveshaft (1) in such a manner that the parts (20a, 20b) of the pinion (20) can be joined together by a radial movement with respect to the driveshaft (1).