Electromagnetic Switching Valve Coupling for Spool Lock Recovery
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Solution Overview
Problem
Conventional electromagnetic switching valves face issues with the transmission member failing to return to its original position due to locking of the spool or external factors, leading to decreased hydraulic oil flow rate and inoperability.
Innovation Solution
The electromagnetic switching valve incorporates a transmission member with a convex first abutting part and a concave second abutting part, which tiltably abut against the plunger and spool respectively, and an outer peripheral wall that contacts the sleeve or stator to regulate inclination, ensuring the transmission member automatically returns to its axis even when deviated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmission member is made free to move when the spool is locked, then the spool can be unlocked, but the transmission member may tilt due to its own weight or external vibration and fail to return to the original position
Solution Approach 1:
The patent applies the anti-weight principle by introducing an energizing spring that exerts a force opposite to the gravitational force and external vibrations acting on the transmission member. The spring is configured to push the transmission member back to its original position (where the first abutting part contacts the plunger) when the spool is locked and the transmission member becomes free. This counterbalancing force prevents the transmission member from tilting or deviating due to weight or vibration, ensuring it reliably returns to the correct position to unlock the spool.
2Stability of the object's composition
If the transmission member is constrained to prevent tilting, then position stability is maintained, but the ability to return to original position when deviated is reduced
Solution Approach 1:
The patent applies the dynamics principle by designing the transmission member with a specific geometric configuration including a first abutting part (convex shape), a second abutting part (concave shape), and an outer peripheral wall. This configuration allows the transmission member to dynamically adapt its state: when in the correct position, the outer peripheral wall is spaced from the sleeve inner peripheral surface, allowing free movement; when deviated or tilted, the outer peripheral wall contacts the sleeve inner peripheral surface to provide guidance and regulate inclination, automatically guiding it back to the original position without additional constraints.
3Stability of the object's composition
If the outer peripheral wall contacts the sleeve inner peripheral surface to regulate inclination, then position stability is improved, but device complexity increases
Solution Approach 1:
The patent applies the universality principle by designing the outer peripheral wall of the transmission member to serve multiple functions: (1) it forms part of the tubular transmission member structure, (2) it provides guidance by contacting the sleeve inner peripheral surface when the transmission member deviates or tilts, (3) it regulates inclination to prevent excessive deviation, and (4) its spacing from the sleeve allows free movement when properly positioned. This multi-functional design achieves position stability without adding separate constraint mechanisms, thereby avoiding increased device complexity.
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 design allows the transmission member to automatically return to its original position, maintaining the valve's functionality even when temporarily free or deviated, thereby preventing hydraulic oil flow disruptions and ensuring reliable operation.
Implementation Method 1
an electromagnetic actuator, including a plunger disposed on the axis and a stator exerting a magnetomotive force on the plunger
Implementation Method 2
an energizing spring, energizing the spool toward the plunger
Data Source
AI summary
An electromagnetic switching valve includes: a sleeve, defining a port communicating with an oil passage; a spool, reciprocally movably disposed on an axis in the sleeve, opening and closing the port; an electromagnetic actuator, including a plunger disposed on the axis and a stator; a transmission member interposed between the plunger and the spool; and an energizing spring, energizing the spool toward the plunger. The transmission member includes a first abutting part of a convex shape tiltably abutting against a receiving recess of the plunger; a second abutting part of a concave shape abutting against a convex end of the spool; and an outer peripheral wall that, in a state of being deviated from the axis and inclined, regulates the inclination by contacting an inner peripheral surface of the sleeve or the stator.