Braking Valve Control Apparatus Using Magnetic Position Detection

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Solution Overview

Problem

Existing control apparatuses for braking valves in operating machines are unreliable due to oil leaks and complex construction, leading to malfunction and high costs.

Innovation Solution

A control apparatus using magnetic means to detect the position of the control mechanism and cursor without mechanical connections, featuring a magnetic element that moves within a permeable support and a Hall effect sensor to detect magnetic field variations, eliminating the need for mechanical gaskets and reducing overall dimensions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If mechanical connection means (drive shaft with seal gasket) are used to transmit motion from the cursor to the potentiometer, then the potentiometer can detect the cursor position, but oil leaks occur due to wear and assembly issues, causing malfunction

Engineering Contradiction:

ImprovereliabilityVSAvoidoil leaks

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical connection system (drive shaft with seal gasket) with a magnetic field-based detection system. A magnetic element is coupled to the cursor and a Hall effect sensor detects its position without physical contact. This eliminates mechanical wear and oil leaks while maintaining detection functionality, directly resolving the reliability issue caused by seal gasket failures.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If mechanical connection means with seal gasket are used, then motion transmission is achieved, but friction causes wear and difficult movement

Engineering Contradiction:

Improveease of movementVSAvoidfriction

Core Design Contradiction:

Ease of operationVSObject-generated harmful factors

Solution Approach 1:

The patent eliminates the mechanical drive shaft and seal gasket system by using a magnetic element coupled to the cursor that can be detected by a Hall effect sensor. This non-contact magnetic coupling removes the friction and wear problems associated with mechanical sealing, allowing smooth cursor movement without resistance from seal gaskets.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of manufacture

If mechanical connection means are used for motion transmission, then the potentiometer can be positioned outside the liner, but construction complexity increases and assembly becomes difficult

Engineering Contradiction:

Improveassembly simplicityVSAvoidconstruction complexity

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent replaces the complex mechanical drive shaft assembly with a simplified magnetic coupling system. The magnetic element is directly coupled to the cursor and the Hall effect sensor detects its position without requiring external mechanical linkages. This reduces the number of parts, simplifies assembly, and eliminates the need for precise mechanical alignment while maintaining detection accuracy.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Measurement precision

If sensor extends outside the cursor liner for the entire stroke, then cursor position can be detected, but overall dimensions and construction complexity increase

Engineering Contradiction:

Improveposition detection accuracyVSAvoidsensor extension length

Core Design Contradiction:

Measurement precisionVSLength of stationary object

Solution Approach 1:

The patent uses a magnetic element that moves with the cursor within the existing liner space, detected by a Hall effect sensor. This magnetic field-based approach allows full stroke detection without requiring the sensor to extend the entire stroke length outside the liner, reducing overall dimensions while maintaining measurement precision.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 enhances reliability and safety by preventing oil leaks, simplifies construction, and reduces maintenance costs while maintaining efficient operation and precise movement detection.

Implementation Method 1

magnetic means operatively connected to at least one of said control mechanism and said cursor and suitable for enabling said sensor device, the latter being sensitive to variations in the magnetic field

Methodology Applied

Scientific EffectMagnetic field: Magnetic Field

Implementation Method 2

Methodology Applied

Scientific EffectHall effect: Hall Effect

Data Source

PatentUS8511641B2Control apparatus for braking valves for operating machines or the like

Publication Date: 2013.08.20 SAFIM

AI summary

The control apparatus for braking valves for operating machines includes a fluid valve having a control cursor for distributing the operating fluid, a control mechanism of the cursor that can be operated by an operator, sensor device sensitive to variations in the magnetic field and suitable for detecting the position of at least one between the control mechanism and the cursor, magnetic assembly operatively connected to between the control mechanism and the cursor for enabling the sensor device. The magnetic assembly includes a magnetic element which is arranged mobile inside a seat obtained in a support permeable to the magnetic field. The magnetic assembly also includes a sustaining element fitted for rotation in the seat and having a first extremity, that can be operated, in rotation, by the motion of the cursor and the control mechanism, A second extremity is associated with a magnetic element.