Eccentric Cam Electric Puncher Asynchronous Multi-Hole Operation
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Solution Overview
Problem
Existing office punchers, especially multi-hole electric punchers, are cumbersome, power-intensive, and costly, failing to meet user requirements for ease of use and cost performance.
Innovation Solution
A compact electric puncher design featuring a rotating shaft with eccentric cams arranged at 90° angles, driving a punching assembly to move asynchronously, reducing motor power and gear strength requirements, and incorporating a motor and gearbox for efficient paper punching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-hole punching capability is implemented, then punching capacity increases, but power consumption and gear strength requirements increase significantly
Solution Approach 1:
The punching operation is divided into multiple independent punching assemblies (first punching assembly and second punching assembly), each capable of operating independently. This segmentation allows the system to handle multiple holes simultaneously without requiring a single high-power mechanism, thereby reducing overall power consumption while maintaining multi-hole punching capacity.
Solution Approach 2:
The punching assemblies operate in an asynchronous periodic manner, where each assembly executes punching cycles at different times during the rotation of the common shaft. The first punching assembly punches at one position while the second punching assembly punches at another position in sequence, enabling multi-hole punching through periodic sequential action rather than simultaneous high-power operation.
2Productivity
If multi-hole punching capability is implemented, then punching capacity increases, but gear strength and device cost increase
Solution Approach 1:
The transmission system is segmented into multiple independent transmission paths, with each punching assembly having its own drive gear (first drive gear and second drive gear) that meshes with the common shaft independently. This segmentation distributes the mechanical load across multiple smaller gears rather than requiring a single high-strength gear system, reducing overall gear strength requirements while achieving multi-hole punching capability.
Solution Approach 2:
The asynchronous periodic operation of punching assemblies reduces peak load demands on the gear system. By staggering the punching cycles, the gear transmission system experiences distributed loading over time rather than concentrated peak loads, allowing for the use of lighter-duty gears that would be insufficient for simultaneous multi-hole punching.
3Device complexity
If manual operation is used, then device complexity is reduced, but operational efficiency decreases
Solution Approach 1:
The punching machine performs self-service through automated operation. The motor automatically drives the common shaft and punching assemblies through the complete punching cycle, eliminating the need for manual intervention during the punching process. The system serves itself by automatically positioning, punching, and returning to initial position, thereby improving operational efficiency while maintaining relatively simple device structure.
Solution Approach 2:
The automated system operates through periodic cycles that automatically repeat the punching sequence. The motor-driven shaft rotates periodically, automatically activating each punching assembly in sequence without manual intervention, thus achieving high operational efficiency through automated periodic action while keeping the control mechanism relatively simple.
4Productivity
If high-power motor is used for multi-hole punching, then punching capacity increases, but device cost and size increase
Solution Approach 1:
The motor power requirement is segmented across multiple punching assemblies that operate asynchronously. Instead of requiring a single high-power motor to drive all punching operations simultaneously, the system uses a lower-power motor that sequentially drives multiple smaller punching assemblies, thereby reducing overall device size and complexity while maintaining multi-hole punching capacity.
Solution Approach 2:
The asynchronous periodic operation of punching assemblies allows a single motor to handle multi-hole punching by distributing the power demand over time. The motor delivers power in periodic pulses to different punching assemblies at different times during rotation, reducing peak power requirements and enabling the use of a compact, lower-power motor instead of a large high-power motor.
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 design results in a user-friendly, cost-effective, and stable electric puncher that efficiently punches multiple sheets of paper with reduced power consumption and gear stress, enhancing operational efficiency and longevity.
Implementation Method 1
The rotating shaft is furnished with eccentric cams that drive the punching assembly to move up and down; Each of the eccentric cams are arranged with certain angle relative to other cams such that the punching assemblies move up and down asynchronously during the rotation of rotating shaft
Data Source
AI summary
Disclosed is an electric puncher. The electric puncher includes at least one punching device, a rotating shaft and a drive unit. The punching device further includes a support frame arranged on the base and a punching assembly that moves up and down along the support frame. The rotating shaft can be connected with the support frame through rotation. The rotating shaft is furnished with eccentric cams that drive the punching assembly to move up and down. The staggered arrangement of eccentric cams enables the punching assemblies to asynchronously move up and down during the rotation of rotating shaft. The drive unit drives the rotating shaft to rotate. The asynchronous vertical motion of various punching assemblies helps to save labor, thereby alleviating the requirements for motor output power and gear strength.