Cycle Counter for Pneumatic Impact Wrench Maintenance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Pneumatic impact wrenches face inefficiencies in maintenance scheduling, as some are maintained too soon due to underuse while others are maintained too late due to excessive wear from heavy use, leading to unnecessary waste of time and potential component damage.
Innovation Solution
A cycle counter is integrated into the pneumatic impact wrench to precisely track the number of cycles performed by the rotor, allowing for accurate scheduling of maintenance based on actual usage, comprising a magnetically detectable rotor, a sensor, a processing unit, and a memory system to store and display usage data, and alert the operator when maintenance is due.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If maintenance is scheduled based on statistical estimates and fixed time periods, then maintenance can be planned in advance, but some wrenches are maintained too soon (wasting time) while others are maintained too late (risk of excessive wear)
Solution Approach 1:
The patent replaces the mechanical/time-based maintenance scheduling system with an electronic measurement and data processing system. A cycle counter electronically tracks the actual number of operational cycles of the rotor, and a processor compares this data against predetermined thresholds to determine maintenance timing. This substitution of electronic measurement for mechanical time-based scheduling enables precise maintenance scheduling based on actual usage rather than fixed time intervals, resolving the contradiction between maintaining reliability and avoiding unnecessary downtime.
2Ease of manufacture
If maintenance is scheduled based on statistical estimates, then planning is simplified, but intense usage leads to excessive wear before maintenance
Solution Approach 1:
The patent replaces simple time-based scheduling with an electronic cycle counting system that automatically tracks actual operational usage. The cycle counter and processor provide automated monitoring and comparison against thresholds, maintaining scheduling simplicity through electronic automation while accurately reflecting actual component usage. This resolves the contradiction by using electronic systems to preserve ease of scheduling while preventing excessive wear through accurate usage tracking.
Solution Approach 2:
The patent implements a feedback mechanism where the cycle counter continuously monitors rotor cycles, the processor compares accumulated cycles against predetermined thresholds, and the system provides alerts or indications when maintenance is due. This closed-loop feedback system ensures maintenance is scheduled based on actual usage patterns rather than fixed estimates, preventing excessive wear while maintaining simple scheduling through automated feedback.
3Ease of operation
If fixed time periods are used for maintenance, then scheduling is straightforward, but underused wrenches undergo unnecessary maintenance
Solution Approach 1:
The patent replaces straightforward time-based scheduling with an electronic system that automatically tracks and processes cycle data. The cycle counter and processor handle the complexity of usage-based scheduling, maintaining ease of operation through automated electronic systems while preventing unnecessary maintenance of underused equipment. This resolves the contradiction by using electronics to preserve scheduling simplicity while eliminating wasteful maintenance.
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
Enables precise maintenance scheduling, reducing unnecessary maintenance downtime and preventing excessive wear by accurately tracking usage and alerting operators when maintenance is required, thus optimizing maintenance timing.
Implementation Method 1
magnet means (13) that is rotatable by the rotor (6)... magnet means (13) comprises a plurality of magnets (16), for example eight in number, each generating, once rotated by the rotor (6), a respective variable magnetic field
Data Source
AI summary
A cycle counter (12) for a pneumatic, or hydraulic, or electric apparatus (1), in particular for a pneumatic impact wrench, comprises a sensor (18) mounted inside the apparatus (1). The sensor (18) is configured for detecting a complete rotation performed by a rotor (6) included in the apparatus (1), and for generating, for each complete rotation detected, a cycle signal. The cycle counter (12) further comprises a processing unit (19) mounted inside the apparatus (1). The processing unit (19) is configured for communicating with the sensor (18) for receiving the aforesaid cycle signal and for processing, on the basis of this cycle signal, information on the use of the apparatus (1), for example a total number of cycles completed by the rotor (6) and/or a rotation direction of the rotor (6) and/or a total or partial working time of the apparatus (1) and/or a number of impacts for each cycle and/or a number of revolutions per minute of the rotor (6). This processing unit (19) comprises a memory card (20) configured for storing the information and making the information accessible to an operator. The sensor (18) is configured in such a manner as to generate the cycle signal when the detected complete rotation is performed at a speed that is lower than a preset reference speed, in particular a loadless rotation speed of the rotor (6).