Replaceable Punching Core Assembly for Fast Core Swapping

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Solution Overview

Problem

Current punching machines face issues with non-replaceable or complicatedly replaceable punching cores, leading to high maintenance costs, labor-intensive operations, and reduced equipment lifespan due to cumbersome disassembly and alignment requirements.

Innovation Solution

A punching machine with a detachable and replaceable punching core, featuring a rotatable control handle, elastic reset assembly, limiting assembly, driving gear, and transmission assembly, allowing for easy swapping of punching cores and precise control over punching operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a fixed punching head is adopted, then the structure is simple, but the adaptability is poor and maintenance costs are high when wear occurs

Engineering Contradiction:
ImproveadaptabilityVSAvoidstructure complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The punching machine is divided into a fixed mounting base and a replaceable punching core assembly. The punching core can be detached and replaced independently when worn or when different punching diameters are needed, allowing easy adaptation without replacing the entire machine.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The mounting base is designed with a universal interface that can accommodate different types of punching cores with varying diameters and shapes. This allows a single machine to perform multiple punching functions by simply changing the core, enhancing adaptability while maintaining structural simplicity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If a complex replaceable punching design is used, then the adaptability is improved, but the ease of operation deteriorates due to cumbersome disassembly and alignment requirements

Engineering Contradiction:
ImproveadaptabilityVSAvoidease of operation
Core Design Contradiction:
Adaptability or versatilityVSEase of operation

Solution Approach 1:

The punching core is designed as a separate, self-contained module that can be removed and installed independently on the mounting base. This segmentation eliminates the need for complex disassembly of the entire machine, making operation simple while maintaining adaptability.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The punching core is extracted as a standalone replaceable component from the main body. Users can quickly remove the worn core and install a new one without affecting other parts of the machine, significantly improving ease of operation while preserving adaptability.

Inventive Principle:
Principle #2Taking out (Extraction)

3Adaptability or versatility

If frequent disassembly is required for maintenance, then the adaptability is improved, but the reliability deteriorates due to accelerated wear on connection structures

Engineering Contradiction:
ImproveadaptabilityVSAvoidreliability
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The machine is segmented into a permanent mounting base and a replaceable punching core. This allows the connection structures of the mounting base to remain intact and wear-free, while only the punching core needs replacement, maintaining reliability while enabling adaptability.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The punching core is designed as a consumable component that can be easily replaced when worn. This approach accepts that the core will need frequent replacement but minimizes the impact on the overall system reliability by keeping the main mounting base structures intact and durable.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

4Manufacturing precision

If precise alignment mechanisms are used, then the manufacturing precision is improved, but the device complexity increases and ease of operation deteriorates

Engineering Contradiction:
Improvepunching precisionVSAvoidstructure complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The punching core is designed as a pre-fabricated module with precision alignment features integrated into its structure. This allows high punching precision to be achieved during manufacturing of the core itself, while the assembly process remains simple and does not require complex alignment mechanisms.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The alignment features and positioning mechanisms are pre-configured during the manufacturing of the punching core. This preliminary action ensures that when the core is installed on the mounting base, precise alignment is automatically achieved without requiring complex adjustment mechanisms or procedures.

Inventive Principle:
Principle #10Preliminary action

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 simplifies maintenance, reduces operational intensity, enhances equipment versatility, and ensures stable punching quality by allowing easy replacement of worn-out cores, improving user experience and reducing downtime.

Implementation Method 1

the elastic element is sleeved on the handle installing shaft and abuts against the contacting rod

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 2

the driving gear is fixedly sleeved on the handle installing shaft, and the driving gear is provided with a first gear component

Methodology Applied
Scientific EffectGear mechanism: Gear

Data Source

PatentUS20260048523A1Punching machine with replaceable punching core
Publication Date: 2026.02.19 DONGGUAN JIAXI OFFICE MACHINE CO LTD
  • US20260048523A1 patent drawing
  • US20260048523A1 patent drawing
  • US20260048523A1 patent drawing

AI summary

A punching machine with a replaceable punching core, including: a mounting base, a replaceable punching core, a control handle, an elastic reset assembly and drive-transmission mechanism. The replaceable punching core is positioned and aligned by matching a bottom outer contour with the installing recess, allowing for tool-free disassembly and replacement, which improves maintenance efficiency and functional flexibility. Adopting a driving gear and a transmission assembly with a hole that meshes with a belt drive, converting the rotational motion of the control handle into vertical punching force. Combined with an elastic reset assembly, the control handle automatically resets after punching. Additionally, the limit component reduces overall height of punching machine, overcoming storage bottleneck. Its beneficial effects include achieving blade core replacement in seconds, smooth and effortless operation, compact structure, high space utilization, and suitability for efficient punching needs in various scenarios, such as office documents and handicrafts.