Hydraulically Released Brake with Torque Pin Disc Support
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Solution Overview
Problem
Existing spring applied, hydraulically released brakes used in scissor lift and telehandler vehicles are inefficient due to the high cost and complexity of sand cast iron components, and the need for compact designs that minimize machining operations and material usage.
Innovation Solution
The brake employs near net shape die cast components and a compact disc support system with torque pins and reliefs to reduce machining and material requirements, allowing for a more efficient assembly and installation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sand cast iron components are used, then the brake can be manufactured with traditional methods, but the manufacturing cost increases and machining operations become more complex
Solution Approach 1:
The patent changes the manufacturing parameter from sand casting to die casting, which fundamentally alters the production process. Die casting produces near-net-shape components that require minimal machining, directly resolving the contradiction between traditional manufacturing ease and machining complexity
Solution Approach 2:
The die casting process performs preliminary shaping of components before assembly, creating near-final shapes that require minimal post-processing. This preliminary action eliminates the need for complex machining operations that would otherwise be required with sand cast components
2Productivity
If die cast components are used, then machining operations are reduced and material usage is minimized, but the manufacturing process requires near net shape precision
Solution Approach 1:
The brake assembly is segmented into modular components (housing, piston assembly, disc stack) that can be independently die cast and then assembled. This segmentation allows each component to be optimized for die casting while maintaining overall assembly precision
Solution Approach 2:
The patent uses precision-machined mating surfaces and locating features as intermediaries between die cast components. These intermediary features compensate for minor variations in die cast precision while enabling efficient assembly
3Volume of moving object
If the brake design is made more compact, then available space is optimized, but the stationary disc support structure becomes more complex
Solution Approach 1:
The patent merges the stationary disc support function into the brake housing itself, eliminating the need for separate support structures. The housing directly supports the stationary discs, reducing overall brake volume while avoiding additional complexity from separate support components
Solution Approach 2:
The brake housing serves multiple functions: it contains the hydraulic system, provides structural support, and directly supports the stationary discs. This multi-functionality reduces the need for additional dedicated support structures, maintaining compact design without increasing complexity
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 reduces machining operations, minimizes material usage, and provides a more compact and efficient brake design that can be installed like-for-like in existing applications, lowering costs and improving assembly efficiency.
Implementation Method 1
spring applied, hydraulically released brake
Implementation Method 2
spring applied, hydraulically released brake
Implementation Method 3
hydraulically released brake... utilize hydraulic fluid to create hydraulic pressure in order to release the brake
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A brake (10) includes a housing (12) formed from a first housing portion (14) capable of receiving a second housing portion (16). The first housing portion (14) houses a piston (18) and a plurality of springs (20), and the second housing portion (16) houses an alternating arrangement of discs (52) for enacting a braking function. The second housing portion (16) further includes torque pin holes (80) for receiving torque pins (82) therein. Each torque pin (82) is secured with a plug (84) to secure stationary discs (54A, 54B, 54C) in place. The stationary discs (54A, 54B, 54C) have extending ears (74) positioned between torque pin grooves (76), which further receive the torque pins (82).