Pressing Device Gear System Axial Feed Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pressing devices for connecting drinking water pipes are costly due to precise manufacturing requirements, complex handling of hydraulic oil, and the use of voluminous and complex planetary gears, which are prone to failure.
Innovation Solution
A compact pressing device utilizing an electric motor with a gear system comprising a spindle driven by a first and second gear part, where the spindle experiences axial feed through rotation of drive wheels and a spindle nut, allowing for high pressing forces with a simple design and efficient force transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If planetary gears are used to transmit force from the pressing ram to the drive, then high pressing forces can be generated, but the device becomes very complex and voluminous, making it prone to failure and difficult to use in tight spaces
Solution Approach 1:
The patent extracts and eliminates the planetary gear mechanism from the pressing device, replacing it with a simpler direct-drive or alternative transmission system. This removal of the complex planetary gears resolves the contradiction by maintaining force transmission capability through a less complex mechanical arrangement, thereby reducing device complexity and improving reliability while avoiding the voluminous nature of planetary gears.
Solution Approach 2:
The patent substitutes the mechanical planetary gear system with an alternative mechanism that achieves the same force transmission function. This could involve using a different gear arrangement, a screw mechanism, or another transmission system that is less complex and more compact than planetary gears, thus resolving the contradiction between generating high pressing forces and maintaining simple, compact design.
2Force
If hydraulic oil is used to build up pressure for the piston, then high pressing forces can be applied, but the manufacturing tolerances required are very precise and handling the oil during initial filling and maintenance is complex
Solution Approach 1:
The patent replaces the hydraulic system with a direct mechanical drive system, likely using an electric motor coupled with a gear or screw mechanism to drive the piston directly. This substitution eliminates the need for hydraulic oil and associated precision requirements, resolving the contradiction by achieving high pressing forces through mechanical means that are more tolerant of manufacturing variations and simpler to maintain.
Solution Approach 2:
The patent eliminates the hydraulic system entirely, replacing it with a mechanical or potentially pneumatic system that does not require hydraulic oil. This removal of the hydraulic component resolves the contradiction by avoiding the precise manufacturing tolerances and complex handling requirements associated with hydraulic systems while still capable of generating the necessary pressing forces.
3Force
If hydraulic oil is used in the pressing device, then pressing force can be transmitted, but the oil continues to diffuse over time, which leads to a loss of pressing force and requires maintenance
Solution Approach 1:
The patent extracts and removes the hydraulic oil system from the pressing device, replacing it with a sealed mechanical transmission system. This elimination of hydraulic oil resolves the contradiction by preventing the diffusion and force loss problems associated with hydraulic systems, thereby improving reliability and reducing maintenance requirements while maintaining the ability to transmit pressing forces.
Solution Approach 2:
The patent designs a mechanical drive system that is self-contained and does not require hydraulic fluid, eliminating the need for oil changes, leaks, or associated maintenance. This self-service approach resolves the contradiction by achieving reliable, long-term force transmission without the degradation and maintenance issues inherent in hydraulic systems.
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 solution enables the application of high pressing forces in a compact form, reducing production costs and complexity, while minimizing the risk of mechanical failure, and simplifying maintenance by eliminating the need for hydraulic oil and complex planetary gears.
Implementation Method 1
a gear (4) driven by the output shaft (3), a spindle (5) driven by the gear (4), which defines a central axis (M), a press piston (6) driven by the spindle (5)
Implementation Method 2
the spindle (5) experiences an axial feed with respect to the spindle wheel (8b) and with respect to the spindle nut (9b)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A press device (1) comprises an electric motor (2) with an output shaft (3), a gearbox (4) driven by the output shaft (3), a spindle (5) driven by the gearbox (4) which defines a central axis (M), a press piston (6) driven by the spindle (5), and a tool holder (7) for receiving a press tool, wherein the gearbox (4) has a first gearbox part (8) acting on the spindle (5) and a second gearbox part (9) acting on the spindle (5), wherein the first gearbox part (8) has a first drive wheel (8a) and spindle wheel (8b), wherein the spindle (5) is mounted in the spindle wheel (8b) so as to be rotationally fixed and longitudinally displaceable, and which spindle wheel (8b) is rotatable with respect to rotation about the central axis (M) and fixed with respect to movement along the central axis (M), wherein the second gearbox part (9) has a second drive wheel (9a) and a tool holder driven by the second drive wheel (9a). spindle nut (9b) haswhich spindle nut (9b) is rotatable with respect to a rotation about the central axis (M) and fixed with respect to a movement along the central axis (M), and wherein, upon rotation of the two drive wheels (8a, 9a), the spindle wheel (8b) and the spindle nut (9b) are set into rotational motion, such that the spindle (5) experiences an axial feed with respect to the spindle wheel (8b) and with respect to the spindle nut (9b), wherein, during this axial feed of the spindle (5), the press piston (6) experiences a feed movement in the direction of the tool holder (7).