Sintered Toothed Gear Unit for Compact High-Torque Transmission
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Solution Overview
Problem
Existing transmissions face challenges in achieving a compact design while transmitting high torque efficiently, with a focus on the construction and manufacturing of toothed parts that require machining and are not cost-effective.
Innovation Solution
A transmission with a rotatably mounted toothed part made of sintered metal powder, featuring a single-piece design with bearing receptacles and face toothing, where the toothing is formed during sintering, and a gearing arrangement supported on both sides, with chamfered edges and a conical surface structure to facilitate demolding and reduce notch effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional machining methods are used to manufacture toothed parts, then manufacturing precision can be achieved, but production cost increases and productivity decreases
Solution Approach 1:
The patent changes the manufacturing parameter from mechanical machining to sintering process. By controlling sintering temperature, pressure, and time parameters, precise toothed parts are produced directly from metal powder without traditional machining, achieving both high precision and improved productivity
Solution Approach 2:
The toothed geometry is pre-formed during the sintering process itself rather than requiring subsequent machining operations. The metal powder is shaped with precise tooth profiles before sintering, eliminating post-processing steps and improving production efficiency
2Manufacturing precision
If traditional machining methods are used to manufacture toothed parts, then manufacturing precision can be achieved, but production cost increases
Solution Approach 1:
The patent transitions from machining parameters to sintering parameters (temperature, pressure, atmosphere control). This parameter change enables direct formation of precise toothed parts with reduced material waste and lower manufacturing costs compared to traditional machining
Solution Approach 2:
The patent uses metal powder as a disposable starting material that is directly transformed into the final product through sintering. This eliminates expensive tooling, fixtures, and machining tools required in traditional manufacturing, reducing overall production cost
3Device complexity
If the toothed part is designed as a single piece with bearing receptacles, then device complexity is reduced, but manufacturing difficulty increases
Solution Approach 1:
The patent combines the toothed part and bearing receptacles into a single integrated component manufactured in one sintering process. This merging reduces assembly complexity and the number of parts while the sintering process makes manufacturing the complex integrated structure feasible and cost-effective
4Productivity
If the toothing is formed during sintering without machining, then productivity increases and cost decreases, but manufacturing precision may be compromised
Solution Approach 1:
The patent optimizes sintering parameters (temperature gradient, pressure, atmosphere, time) to achieve precise tooth profiles directly during sintering. By carefully controlling these parameters, the same process that improves productivity also ensures manufacturing precision without requiring subsequent machining
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
The solution enables a compact, high-torque transmission with reduced machining needs, cost-effective production, and improved load-bearing capacity, while ensuring reliable assembly and sealing, thus enhancing the transmission's efficiency and durability.
Implementation Method 1
the toothed part including the toothing is made of sintered metal powder
Data Source
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AI summary
Disclosed are a gear unit comprising a rotatably mounted toothed part and a process for manufacturing a gear unit comprising a toothed part, the toothed part having bearing seats and teeth; the toothed part, in particular including the teeth, is made of sintered metal powder, in particular the toothed part being formed integrally, especially in one piece.