Cycloidal Axial Pump Assembly for Compact High-Force Tools
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hydraulic tools are complex, heavy, and bulky, particularly in high force applications, leading to increased manufacturing costs and user inconvenience.
Innovation Solution
An axial pump assembly utilizing a cycloidal disk and ring mechanism with a cam track and follower system to generate reciprocating motion, eliminating the need for a gear reducer and reducing component complexity and size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a gear reducer assembly is used to drive the hydraulic pump, then the tool can achieve high force output, but the tool becomes complex, heavy, and bulky
Solution Approach 1:
The patent combines the gear reducer assembly and hydraulic pump into a single integrated unit where the pump is positioned within the gear reducer housing. The pump drive shaft is directly coupled to the motor shaft through the gear mechanism, eliminating the need for separate drive components. This merging reduces overall assembly complexity while maintaining high force output capability through the gear reduction mechanism.
Solution Approach 2:
The hydraulic pump is nested within the gear reducer assembly, with the pump housing positioned inside the gear reducer housing. The pump drive shaft fits within the gear mechanism space, and the drive shaft seal is integrated into the pump housing structure. This nesting arrangement consolidates multiple components into a compact configuration, reducing the tool's overall size and weight while preserving force output.
2Force
If a gear reducer assembly is used to drive the hydraulic pump, then the tool can achieve high force output, but the tool weight increases
Solution Approach 1:
By merging the pump and gear reducer into a single integrated assembly, the patent eliminates redundant structural components and fasteners that would otherwise be required to connect separate units. The shared housing and integrated drive train reduce material usage and overall weight while maintaining the force multiplication benefit of gear reduction.
Solution Approach 2:
The nested configuration places the hydraulic pump inside the gear reducer housing, utilizing the existing structural framework. This eliminates the need for additional external mounting brackets and support structures, reducing overall tool weight. The compact nested arrangement optimizes space utilization and minimizes the total mass required to achieve high force output.
3Force
If a gear reducer assembly is used to drive the hydraulic pump, then the tool can achieve high force output, but the tool size increases
Solution Approach 1:
The integrated design merges the pump housing with the gear reducer housing, creating a unified structure that occupies less space than two separate assemblies. The pump drive shaft is positioned concentrically within the gear mechanism, and the drive shaft seal is integrated into the existing housing structure, eliminating the need for additional external components and reducing overall tool dimensions.
Solution Approach 2:
By nesting the hydraulic pump within the gear reducer assembly, the patent achieves a compact configuration where the pump components are positioned within the existing structural envelope. This nested arrangement maximizes space utilization and minimizes the tool's external dimensions while maintaining the force output capability through gear reduction.
4Volume of moving object
If the pump components are integrated within the gear reducer assembly, then the tool design becomes compact, but the manufacturing complexity increases
Solution Approach 1:
The patent segments the integrated assembly into distinct functional modules: the gear reducer mechanism, the hydraulic pump components, and the sealed drive train section. Each module can be manufactured and assembled separately using standard machining and assembly processes, then integrated into the final compact configuration. This segmentation reduces manufacturing complexity while maintaining the compact integrated design.
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 axial pump assembly achieves compact design, reduced weight, and stable operation, enabling efficient high-force applications with a user-friendly interface.
Implementation Method 1
a ring defining a cam track, where the ring can be engaged with the cycloidal disk so that rotation of the cycloidal disk causes corresponding rotation of the ring about the axis. The assembly can also include a plate having a follower that engages with the cam track so that rotation of the cam track causes corresponding reciprocating motion of the plate along the axis.
Data Source
AI summary
An axial pump assembly for a hydraulic tool includes a cycloidal disk rotatable about an axis and having an eccentric opening configured to receive a rotational input. A ring defines a cam track and is engaged with the cycloidal disk so that rotation of the cycloidal disk causes corresponding rotation of the ring about the axis. A plate includes a follower that engages with the cam track so that rotation of the cam track causes corresponding reciprocating motion of the plate along the axis.