Forklift Front Wheel Brake Device with Nested Multi-Disc Mechanism
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Solution Overview
Problem
Conventional shoe brakes used in forklifts suffer from poor braking performance and complex maintenance due to their narrow installation space and requirement for complete disassembly for part replacement or repair.
Innovation Solution
A compact wet multi-disc brake device is designed to fit within the narrow space between the front wheel and mast assembly, featuring a brake housing with an openable compartment for easy maintenance and a wheel hub that allows unitary rotation with the axle shaft, enabling improved braking performance and simplified maintenance without detaching the front wheels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shoe brakes are used in the narrow installation space, then the brake device can be installed, but the braking performance deteriorates
Solution Approach 1:
The brake housing is received within the front wheel, creating a nested structure where the brake components are housed inside the wheel assembly. This nesting approach allows the brake device to utilize the internal space of the front wheel, effectively solving the narrow installation space problem while accommodating the multi-disc brake mechanism required for improved braking performance
2Reliability
If shoe brakes are used, then the installation space requirement is met, but the braking performance is insufficient for heavy-weight forklifts
Solution Approach 1:
The brake device is segmented into distinct functional components: brake housing, brake discs, friction plates, and piston. This segmentation allows each component to be optimized for its specific function while working together to deliver superior braking performance. The multi-disc brake structure with alternating brake discs and friction plates provides increased braking surface area and improved performance compared to traditional shoe brakes
3Ease of repair
If the brake device is designed as a compact unit, then it fits in narrow space, but maintenance requires complete disassembly
Solution Approach 1:
The brake housing is extracted as a separate, removable component from the front wheel assembly. This extraction design allows the brake housing to be detached independently for maintenance purposes, enabling technicians to service the brake components without completely disassembling the front wheel or other brake components. The removable brake housing serves as an accessible maintenance portal that significantly reduces maintenance time and improves ease of repair
4Reliability
If a multi-disc brake is used, then braking performance improves, but the installation space requirement increases
Solution Approach 1:
The brake discs and friction plates are arranged in an axial configuration along the axle shaft, utilizing the axial dimension rather than requiring additional radial or lateral space. This dimensional arrangement allows multiple brake discs and friction plates to be stacked in sequence, maximizing the braking surface area and performance while maintaining a compact overall footprint that fits within the narrow installation space of the front wheel assembly
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 provides enhanced braking performance and improved maintainability by allowing the disc brake to be installed in a narrow space and enabling access for part replacement without disassembling the entire brake device, thus addressing safety and maintenance challenges.
Implementation Method 1
a piston provided within the brake housing for, when operated, pressing the friction plates against the brake discs
Data Source
AI summary
A front wheel brake device for forklifts is used in applying brake to a front wheel attached to opposite lateral bottom sides of a mast assembly. The device includes a support bracket provided at the bottom sides of the mast assembly, a brake housing fixed to the support bracket and received within the front wheel, a wheel hub fixedly secured to the front wheel, an axle shaft rotatably provided within the brake housing and engaged with a shaft portion of the wheel hub for unitary rotation with the front wheel, brake discs axially movably fitted to the axle shaft for unitary rotation therewith, friction plates alternately arranged between the brake discs and fitted to the brake housing for movement in an axial direction of the axle shaft, and a piston provided within the brake housing for, when operated, pressing the friction plates against the brake discs.