Movable Lifting Frame Layout for Stable, Precise Lifting Gear
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Solution Overview
Problem
Conventional lifting gears lack stability and safety, particularly in preventing rollover and ensuring precise alignment of components, and do not have effective mechanisms for contact-free electrical supply and safe operation.
Innovation Solution
A lifting gear design with a movable lifting frame that includes a base plate, supporting part with integrated linear guides, gear rack, and electric motor, ensuring stability and precise alignment, and features contact-free electrical supply through inductive coupling and safety mechanisms like self-locking gear units and current sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the lifting gear uses a conventional design without integrated component mounting, then the device complexity is reduced, but the alignment precision of linear guides, gear rack, and bus bars deteriorates
Solution Approach 1:
The patent integrates the linear guides, gear rack, and bus bars onto a single supporting part (carrier), which is itself mounted on the base plate. This merging of multiple components into one integrated structure ensures precise relative alignment during assembly while maintaining manageable device complexity through modular design.
2Ease of operation
If the electric motor is mounted on the supporting part rather than the lifting frame, then the ease of operation is improved, but the stability and protection of the motor deteriorates
Solution Approach 1:
The electric motor is integrated with the supporting part (carrier) as a unified assembly, allowing the motor to be positioned on the stable base plate structure. This provides both operational ease through centralized control and enhanced stability/protection by mounting the motor on the rigid supporting part rather than the moving lifting frame.
3Reliability
If the base plate is made with greater wall thickness and steel material, then the reliability is improved, but the weight of the stationary object increases
Solution Approach 1:
The base plate is constructed with greater wall thickness specifically in critical areas (such as the rear wall and load-bearing regions) to prevent rollover and enhance stability. This localized reinforcement approach improves reliability where needed while minimizing overall weight increase compared to uniformly thickening the entire base plate.
4Stability of the object's composition
If the lifting part is positioned within the base plate projection, then the stability is improved, but the ease of operation is reduced
Solution Approach 1:
The base plate is designed with an asymmetric projection that extends beyond the lifting part in the rear direction, creating a counterweight effect that prevents rollover. The lifting part remains accessible from the front while the extended rear portion of the base plate provides stability without blocking operational access.
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 design provides enhanced stability, prevents rollover, ensures precise alignment, and ensures safe operation by preventing collisions and detecting potential hazards, thereby improving safety and efficiency.
Implementation Method 1
An electric motor is situated in the lifting frame, a toothed wheel (22) meshes with the gear rack (23) and is connected in a torsionally fixed manner to a shaft of the electric motor
Implementation Method 2
The electric motor includes a gear unit, the electric motor, thus, for example, being a geared motor, the shaft being the output shaft of the gear unit. The gear unit has a self-locking configuration, e.g., so that the gear unit conducts a torque flow from the input shaft of the gear unit arranged as a rotor shaft of the electric motor, to the output shaft of the gear unit and inhibits a torque flow from the output shaft of the gear unit to the input shaft
Data Source
AI summary
A lifting gear includes a lifting frame movable relative to a supporting part of the lifting gear in a movement direction. The supporting part is arranged on and connected to a base plate, at least one linear guide, at least one bus bar, and a gear rack are fixed in place on the supporting part, an electric motor is situated in the lifting frame, a toothed wheel meshes with the gear rack and is connected in a torsionally fixed manner to a shaft of the electric motor, and a lifting part is connected to the lifting frame. The perpendicular projection of the lifting part onto a plane whose normal direction is aligned in parallel with the movement direction is included in, i.e., for example, encompassed by, the perpendicular projection of the base plate onto this plane.