Angled Portable Pressing Tool for Tight-Space Crimping Force
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Solution Overview
Problem
Existing portable electric crimping tools with a linear configuration are too large for use in tight spaces, limiting their applicability in certain construction contexts where space is constrained.
Innovation Solution
A portable electric pressing tool with a compact design, featuring a planetary gear arrangement and bevel gear mechanism that converts torque into linear force, allowing for a balanced and efficient operation in confined areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a linear configuration pressing tool is used, then the pressing force is sufficient, but the tool size becomes too large for tight spaces
Solution Approach 1:
The patent transitions from a linear configuration to a compact configuration where the motor output shaft is arranged at an angle (e.g., 90 degrees) to the pressing direction. This dimensional change allows the pressing force to be transmitted perpendicular to the motor shaft, reducing the tool's length in the pressing direction while maintaining sufficient force through the angled transmission mechanism.
Solution Approach 2:
The patent employs a nested arrangement where the planetary gear set is integrated within the handle structure, and the bevel gear mechanism is positioned within the pressing mechanism housing. This nesting of transmission components within the tool's structural elements reduces overall tool length while maintaining the necessary force transmission path.
2Length of moving object
If the tool size is reduced for tight spaces, then the tool can be used in confined areas, but the torque conversion efficiency may be compromised
Solution Approach 1:
The patent introduces a planetary gear set as an intermediary between the motor output shaft and the bevel gear mechanism. This planetary gear set acts as a torque amplifier and speed reducer, efficiently converting the motor's rotational torque into the linear pressing force needed at the jaws, while maintaining compact dimensions through its concentrated gear arrangement.
Solution Approach 2:
The patent uses a composite transmission system combining two different gear mechanisms (planetary gears and bevel gears) working together. The planetary gear set provides torque multiplication, while the bevel gear mechanism provides the angular conversion, creating a composite transmission system that maintains high efficiency in a compact form factor.
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 tool achieves a small size and weight-to-force ratio, enabling effective crimping operations in tight spaces with a balanced handling and efficient torque conversion, surpassing the capabilities of existing tools in terms of compactness and functionality.
Implementation Method 1
The transmission has a planetary gear arrangement, a bevel gear arrangement and a conversion mechanism
Implementation Method 2
The planetary gear arrangement converts torque into linear force for actuating the jaws
Implementation Method 3
The bevel gear arrangement redirects the flow of torque substantially 90 degrees
Data Source
AI summary
A portable electric pressing tool has an electric motor arranged at least partially within the handle of the tool and having a motor output shaft extending along a first axis along the handle, and a pressing mechanism having a pair of jaws and which is operatively coupled to the motor output shaft via a transmission of the tool which in use causes relative movement of the jaws between first and second relative positions. The transmission may have a bevel gear arrangement for redirecting torque flowing along the first axis into the bevel gear arrangement so that torque output from the bevel gear arrangement flows into a conversion mechanism of the transmission for converting torque into linear force along a second axis for causing said relative movement between the jaws. The motor output shaft is arranged at an angle of 45 degrees to 135 degrees relative to the second axis.