Axial Pump Assembly With Integrated Cam Drive for Compact Hydraulic Tools
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hydraulic power tools are often complex, heavy, and bulky, making them cumbersome and costly, especially for high-force applications, and not user-friendly.
Innovation Solution
The axial pump assembly incorporates a reciprocating block with ramped radial channels, a sun driver, ball elements, and a base, along with a cycloidal disk and cam follower bearings to generate reciprocating motion, reducing the need for external gear reduction assemblies and creating a compact, coaxial design that simplifies the transmission end of the hydraulic tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a motor, hydraulic pump, and gear assembly are used in hydraulic tools, then high force output is achieved, but the tool becomes complex, heavy, and bulky
Solution Approach 1:
The patent combines the motor shaft, pump drive mechanism, and gear reduction functions into a single integrated axial pump assembly. The motor shaft directly drives the pump pistons through a cam mechanism, eliminating the need for separate gear reducers and transmission components while maintaining high force output capability
Solution Approach 2:
The axial pump assembly serves multiple functions simultaneously: it provides gear reduction, drives the pump pistons, and converts rotational motion to reciprocating motion all within a single compact unit. This multi-functional design reduces overall device complexity while preserving force generation capability
2Force
If a motor, hydraulic pump, and gear assembly are used in hydraulic tools, then high force output is achieved, but the tool becomes heavy and bulky
Solution Approach 1:
By merging the motor shaft, pump drive mechanism, and gear reduction functions into a single integrated axial pump assembly, the patent eliminates redundant components and reduces overall weight while maintaining high force output capability
Solution Approach 2:
The patent segments the traditional multi-component transmission system into a compact axial pump assembly that can be directly coupled to the motor, reducing the overall mass of moving parts while preserving force generation
3Force
If a motor, hydraulic pump, and gear assembly are used in hydraulic tools, then high force output is achieved, but the tool becomes costly to manufacture
Solution Approach 1:
The integrated axial pump assembly reduces the number of discrete components that need to be manufactured, assembled, and quality-tested, thereby lowering manufacturing costs while maintaining high force output capability
Solution Approach 2:
The patent extracts and eliminates the separate gear reducer assembly from the traditional hydraulic tool design, reducing manufacturing complexity and cost while preserving the necessary force multiplication through the axial pump mechanism
4Force
If a motor, hydraulic pump, and gear assembly are used in hydraulic tools, then high force output is achieved, but the tool is cumbersome for operator use
Solution Approach 1:
By combining all drive mechanisms into a compact axial pump assembly, the patent creates a more maneuverable tool that is easier for operators to handle and position while maintaining high force output for cutting and crimping operations
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 results in a more compact, lightweight hydraulic tool with reduced complexity and cost, providing stable motion and efficient force transmission while eliminating the need for external gear reducers, enhancing user experience and operational efficiency.
Implementation Method 1
ball elements configured to roll on a race portion, each ball element arranged at least partially within a respective ramped radial channel of the ramped radial channels
Implementation Method 2
reciprocating block having ramped radial channels extending radially outward from an inner circumferential surface of the reciprocating block
Data Source
Figure 1A~1C
Figure 1D~1E
Figure 1F
AI summary
Axial pump assemblies for a hydraulic tool include a reciprocating element (102) that is configured to move between a retracted position and an extended position, a cam surface (114) in the reciprocating element (102) that can engage cam followers (108), a rotating element (104) that can receive rotational input, and a base (110) that can at least partially surrounds the rotating element (104). Movement of the cam followers (108) along the cam surface (114) can move the reciprocating element (102) from the retracted position to the extended position.