Hoist Drive Drum with Integrated Planetary Gear Train
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Solution Overview
Problem
Conventional mining machine hoist drive systems are complex and difficult to maintain, with large and cumbersome components that complicate replacement processes.
Innovation Solution
A compact hoist system featuring a drum with a planetary gear train and dual motors, where the planetary gear train is positioned within the drum's shell, allowing for efficient reeling and paying out of cables, and a lubrication system for reduced wear and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional drive system with separate motor and gear transmission is used, then the system can provide sufficient torque to the hoist drum, but the system becomes large and complicated with difficult component replacement
Solution Approach 1:
The patent combines the motor and gear transmission into a single integrated hoist drum assembly. The motor is mounted directly on the drum, and the gear transmission is positioned within the drum's shell, creating a unified structure where components are pre-assembled and can be replaced as a module, significantly reducing maintenance complexity and improving ease of repair.
2Weight of moving object
If a compact hoist system with integrated planetary gear train is used, then service time and weight are reduced, but the planetary gear train must be positioned within the limited interior space of the drum shell
Solution Approach 1:
The patent implements nesting by positioning the planetary gear train within the hollow interior of the drum shell. The gear transmission is housed inside the drum's hollow space, and the motor is mounted on the drum's outer surface, creating a compact nested arrangement that reduces overall system weight while utilizing the drum's internal volume efficiently.
3Device complexity
If the planetary gear train is positioned within the drum shell, then the system becomes more compact, but lubrication access becomes more difficult
Solution Approach 1:
The patent introduces a lubrication manifold as an intermediary component that rotates with the motor output shaft. This manifold includes ports and channels that deliver lubrication medium to the planetary gear train through fluid communication, enabling lubrication access without requiring direct external access to the enclosed gear train, thus maintaining system compactness while ensuring proper lubrication.
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 compact design reduces service time and weight, balances load on components, and improves lubrication, making maintenance easier and more efficient.
Implementation Method 1
The planetary gear train includes an input gear coupled to the motor output shaft and an output gear coupled to the internal web to rotate the drum about the longitudinal axis
Implementation Method 2
a lubrication system for reduced wear and maintenance
Data Source
AI summary
A hoist system includes a drum, a motor, and a transmission. The drum includes a hollow shell, a first end, a second end, and an internal web, and defines a longitudinal axis extending between the first end and the second end. The internal web extends across an interior portion of the shell in a direction perpendicular to the longitudinal axis, thereby defining a first portion and a second portion of the shell. The motor is coupled to the first end and includes an output shaft. The transmission is driven by the motor and includes a planetary gear train positioned within the interior portion of the shell. The planetary gear train includes an input gear coupled to the motor output shaft and an output gear coupled to the internal web to rotate the drum about the longitudinal axis. The planetary gear train is positioned in a first portion of the shell.