Gearless Direct Drive Bookbinding Machine Transport System
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Solution Overview
Problem
Existing bookbinding machines face issues with positioning errors and reduced service life due to oscillations in the traction device caused by elastic drive trains, limiting precision and design flexibility.
Innovation Solution
A gearless, rotary electric direct drive system is implemented, where the drive wheel is directly attached to the drive motor, eliminating transmission elements with elasticity and providing a rigid connection, allowing for precise control and increased accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a traditional elastic drive train with transmission elements is used, then the drive system has flexibility and can accommodate misalignments, but positioning precision deteriorates due to oscillations and play in the traction device
Solution Approach 1:
The patent removes the entire elastic drive train with its transmission elements (gears, belts, chains) and replaces it with a direct drive system where the motor is rigidly connected to the drive wheel. This extraction of the intermediate transmission elements eliminates the source of oscillations and positioning errors while maintaining drive functionality.
Solution Approach 2:
The traditional mechanical drive train with multiple elastic transmission elements is replaced by an electric direct drive system. The motor's rotor is rigidly connected to the drive wheel, eliminating mechanical transmission elements and their associated elasticity, play, and oscillations that degraded positioning precision.
2Manufacturing precision
If a rigid direct drive connection is implemented, then positioning precision improves and oscillations are eliminated, but design flexibility and accessibility worsen due to the fixed motor position
Solution Approach 1:
The motor is positioned above the drive wheel rather than to the side, utilizing the vertical dimension. This spatial reconfiguration allows the rigid direct drive connection while maintaining accessibility to the motor and drive wheel for maintenance and operation, resolving the conflict between rigidity and accessibility.
3Reliability
If transmission elements with elasticity are used, then the drive system can absorb shocks and irregularities, but service life reduces due to swelling drive torques from vibrations
Solution Approach 1:
The patent eliminates the elastic transmission elements that both absorbed shocks and generated harmful vibrations. By using a rigid direct drive, the system converts the potential harm of shock loads into beneficial feedback signals that can be detected by the motor controller, allowing for precise control while eliminating the vibrations that reduced service life.
Solution Approach 2:
The rigid direct drive connection enables the motor controller to directly detect drive torques and process forces through the motor shaft. This feedback mechanism allows the controller to respond immediately to irregularities in individual processes, eliminating the damping effect of elastic transmission elements while maintaining system reliability through active control.
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 enhances precision in bookblock processing, extends the service life of the traction device, and simplifies the construction of the transport system, enabling more flexible design options and improved alignment accuracy.
Implementation Method 1
a first, rotating component of the rotary direct drive being attached or formed directly on the drive wheel
Data Source
AI summary
A bookbinding machine for processing book blocks (3) has a transport system (2) with a plurality of book block grippers (40) that are continuously movable in a closed orbit and articulated to a traction element (63) for receiving the book blocks (3), wherein the traction element (63) revolves around a drive wheel (55) and a deflection wheel and is tensioned by means of a clamping device. Processing stations (70, 80) are arranged in the area of straight sections of the orbit. The drive wheel (55) is driven by a gearless, rotary, electric direct drive (50), wherein a first, rotating component (53) of the rotary direct drive (50) is directly attached to or formed on the drive wheel (55).