Direct Drive Processing Head for High Torque

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Solution Overview

Problem

Conventional processing machines, such as tooth milling and grinding machines, face challenges in achieving high torque with compact designs due to the limitations of multiaxial movement and rotation control systems, which often require large construction volumes and complex gear systems.

Innovation Solution

A processing head with a direct drive system utilizing two or more synchronized motors, allowing for increased torque while reducing the construction volume, enabling a smaller motor diameter and adaptable tool mandrel length for various workpiece sizes, and facilitating internal milling and grinding operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If conventional multiaxial movement control systems with remote motors, synchronous belts, and gear systems are used, then reliable torque transmission is achieved, but the construction volume increases and the system becomes more complex

Engineering Contradiction:
ImprovetorqueVSAvoidconstruction volume
Core Design Contradiction:
PowerVSVolume of stationary object

Solution Approach 1:

The patent extracts and eliminates the intermediate transmission components (synchronous belts, gear systems, worm drives) from the conventional setup, directly coupling the motors to the spindle and spindle head. This extraction of unnecessary transmission elements reduces construction volume while maintaining torque transmission capability through direct motor coupling.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the complex mechanical transmission system (gears, belts, worm drives) with a direct electrical-mechanical coupling system where motors are directly coupled to the spindle and spindle head. This substitution eliminates mechanical transmission losses and reduces the construction volume by removing intermediate mechanical components.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Power

If conventional gear systems and transmission components are used, then torque multiplication is achieved, but the device complexity increases

Engineering Contradiction:
ImprovetorqueVSAvoidsystem complexity
Core Design Contradiction:
PowerVSDevice complexity

Solution Approach 1:

The patent extracts and removes the complex gear systems, synchronous belts, and intermediate transmission components from the conventional setup. By taking out these unnecessary elements, the system complexity is reduced while torque requirements are met through the direct coupling of multiple motors to the spindle and spindle head.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent merges the functions of multiple motors (spindle motor and spindle head motors) directly into the processing head assembly, eliminating the need for separate transmission systems. This merging of motor functions into a integrated direct-drive system reduces device complexity by consolidating components.

Inventive Principle:
Principle #5Merging (Combining)

3Ease of manufacture

If fixed tool mandrel length is used, then simple structure is maintained, but adaptability to different workpiece sizes is reduced

Engineering Contradiction:
Improvestructural simplicityVSAvoidworkpiece size adaptability
Core Design Contradiction:
Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent implements a movable and adjustable tool mandrel length within the processing head, transforming the fixed structure into a dynamic, adaptable configuration. The tool mandrel can be adjusted to different lengths depending on the workpiece size, providing versatility while maintaining a relatively simple overall structure through modular design.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The processing head is segmented into adjustable components, including the tool mandrel that can be configured for different lengths. This segmentation allows the system to adapt to various workpiece sizes by reconfiguring individual components rather than requiring a completely different processing head for each application.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS8931984B2Processing head
Publication Date: 2015.01.13 LIEBHER VERZAHNTECHNIK GMBH
  • US8931984B2 patent drawing
  • US8931984B2 patent drawing
  • US8931984B2 patent drawing

AI summary

The present invention relates to a processing head for processing machines, preferably tooth milling and tooth grinding machines, comprising a direct drive which is arranged in a processing head bed of a processing machine, wherein the direct drive comprises at least two motors actuatable in synchronism with each other.