Double Lifting Magnet Locking Device for Impulse Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing locking devices with monostable lifting magnets are susceptible to external impulses, leading to unintended unlocking due to oscillation of the spring-mass system, and require high power consumption when using multiple magnets in parallel or offset configurations to mitigate this issue.
Innovation Solution
A locking device actuates two locking bolts arranged 180° apart using a monostable lifting magnet, with a single spring inside the coil providing restoring force and complementary V-shaped or truncated cone recesses for enhanced magnetic attraction, minimizing energy expenditure and neutralizing external impulses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If heavy locking bolts are used to achieve high mechanical locking force, then locking strength is improved, but spring forces increase and require stronger magnetic fields leading to high electrical energy consumption
Solution Approach 1:
The locking device divides the locking function into two separate locking bolts instead of using one heavy bolt. This segmentation allows the spring force and magnetic field to be distributed across two lighter bolts, reducing the energy required to actuate each individual bolt while maintaining the same total locking strength.
2Reliability
If two or more monostable lifting magnets are arranged in parallel or offset to counteract impulse effects, then resistance to external impulses is improved, but power consumption increases
Solution Approach 1:
The invention uses the natural oscillation behavior of spring-mass systems to its advantage by positioning two locking bolts at 180° intervals. When an external impulse causes one bolt to oscillate, the other bolt simultaneously experiences opposing forces, creating a self-canceling effect that neutralizes the impulse without requiring additional magnets or increased power consumption.
3Use of energy by moving object
If two locking bolts are actuated by a single monostable lifting magnet, then power consumption is reduced, but the magnetic field must cover a larger area reducing attraction force
Solution Approach 1:
The patent transitions from a linear arrangement to a spatial arrangement by positioning the two locking bolts at 180° intervals around the coil. This dimensional change allows the magnetic field to effectively actuate both bolts simultaneously from a single location, maintaining strong attraction force while distributing the work across two bolts to reduce overall energy consumption.
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 ensures the locking device is insensitive to external impacts and maintains low power consumption, allowing for effective locking and unlocking with balanced energy distribution between two anchors, enhancing the security and efficiency of the locking mechanism.
Implementation Method 1
A compression spring 4 is arranged between the armatures 2, 3 in such a way that it acts with its restoring force evenly on both armatures 2, 3
Implementation Method 2
When the coil 1 is energized, both locking bolts are moved into an unlocking position by the armature against the pressure of the spring
Implementation Method 3
the ends of the two armatures facing each other positively engage in one another, with one of the armatures having a V-shaped or truncated cone-shaped recess into which a complementary-shaped projection on the other armature engages, the air gap between them is minimized in the de-energized state, which results in a significantly stronger attraction force
Data Source
Figure 1A~1B
Figure 2
AI summary
The invention relates to a locking device (30) with at least one electrically actuable lifting magnet which acts on at least one displaceably arranged closure bolt (10, 11). In contrast to previously customary locking devices with just one or more monostable lifting magnets arranged offset with respect to one another, the invention is distinguished in that the locking device (30) has at least one double lifting magnet which is formed by at least two armatures (2, 3) interacting with at least two closure bolts (10, 11) and by at least one coil (1) at least partially surrounding the two armatures (2, 3). The armatures (2, 3) are preferably arranged displaceably in an opposed manner with respect to each other on a common axis (21) and are preferably acted upon by a compression spring (4) arranged between the armatures (2, 3).