Gas Spring Tacker Motor Integration
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Solution Overview
Problem
Existing hand-held tackers face challenges in minimizing installation space while maintaining efficient operation and energy density, with existing designs often requiring significant space for the clamping mechanism and motor components.
Innovation Solution
The integration of at least part of the clamping mechanism and motor within the gas volume of a high-pressure gas spring, utilizing an electric motor and a ball screw spindle for efficient force transfer and compact design, along with a temperature sensor and controller for regulating clamping strokes, allows for reduced installation space and enhanced energy density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the clamping mechanism and motor are arranged outside the gas volume, then the sealing and structural simplicity are improved, but the installation space increases significantly
Solution Approach 1:
The patent merges the motor and clamping mechanism into the gas volume, eliminating the need for separate sealing arrangements for these components. This integration directly reduces the overall installation space while the sealing complexity is managed through a single seal at the drive rod passage.
Solution Approach 2:
The motor and clamping mechanism are nested within the gas volume, utilizing the existing space efficiently. This nesting approach allows the driving device to achieve a compact design without requiring additional external space for these components.
2Use of energy by moving object
If a high-pressure gas spring is used, then the energy density and compression ratio are improved, but the temperature fluctuations and heat generation increase
Solution Approach 1:
The temperature sensor provides feedback on the gas temperature, enabling the control unit to regulate the tension stroke accordingly. This feedback mechanism allows the system to compensate for temperature fluctuations and maintain optimal performance despite the high-pressure gas spring's heat generation.
Solution Approach 2:
The control unit adjusts the tension stroke parameter based on temperature measurements, dynamically changing the operational parameters to compensate for temperature effects. This allows the system to maintain consistent energy density despite temperature variations in the high-pressure gas spring.
3Device complexity
If the motor and spindle are directly connected, then the device complexity and number of components are reduced, but the precision of force transmission may be affected
Solution Approach 1:
The patent extracts the gearbox from the system by implementing a direct connection between the motor and spindle. This elimination of intermediate components simplifies the device structure while the high-precision ball screw spindle compensates for any potential precision losses through its inherent mechanical accuracy.
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 configuration significantly reduces installation space, increases energy density, and compensates for temperature fluctuations, resulting in a more compact and efficient hand-held tacker with improved performance.
Implementation Method 1
The air contained in the gas volume 9 is elastically compressible to the right
Implementation Method 2
The air contained in the gas volume 9 is displaced by deflection of the setting piston 5 according to FIG. 1 elastically compressible to the right
Implementation Method 3
the clamping mechanism 10 comprises a spindle, in this case a ball screw, with a threaded shaft 11 and a ball screw nut 12
Implementation Method 4
A ball screw provides a low-friction method for converting a rotary motion into a linear clamping motion with a high gear ratio
Implementation Method 5
the driving device includes a temperature sensor for measuring the temperature of the gas within the gas spring
Implementation Method 6
a control unit that regulates the tension stroke of the gas spring depending on a temperature measured by the temperature sensor. This allows unwanted temperature fluctuations of the gas, for example due to waste heat from the engine, to be compensated for
Data Source
Figure 1~2
AI summary
The apparatus has a gas spring (8) with a resiliently compressible gas volume (9). The gas spring is tensioned via a tensioning mechanism (10) by a rotary motor i.e. electromotor (16), to accelerate a setting piston (5) into a setting direction according to release of the gas spring from a tensioned state. A part of the tensioning mechanism is arranged within the gas volume of the gas spring. The motor is arranged outside the gas volume. The tensioning mechanism is connected with the motor via a rotatable shaft (14), and a shaft seal (15) seals the gas volume, and is arranged at the shaft.