Shovel Handle Connecting Device with Snap-Fit Assembly
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Solution Overview
Problem
Existing shovel handles tend to loosen over time due to unstable connections with the shovel scoop, leading to inadequate stability during use.
Innovation Solution
A shovel handle connecting device featuring a connecting assembly with a snap connection mechanism between the connecting member and seat, utilizing limiting fasteners and grooves for secure attachment, along with a rivet for additional stability and a reinforcing plate for enhanced strength, and a curved surface for secure embedding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If threaded fit connection is used to connect shovel handle and shovel scoop, then the connection is simple to manufacture, but the connection becomes loose after long time use and is not stable enough
Solution Approach 1:
The connecting assembly is divided into multiple functional components: connecting member with connecting portion and limiting portion, connecting seat with connecting groove and limiting groove, limiting fastener for snap connection, rivet for fixed connection, and reinforcing plate for strength enhancement. Each component performs a specific function to collectively achieve stable connection.
Solution Approach 2:
The connecting portion is inserted into the connecting groove, and the limiting fastener is snapped into the limiting groove, forming a nested structure where smaller components are inserted into larger ones to create a compact and stable connecting assembly.
2Duration of action of stationary object
If threaded fit connection is used, then the assembly process is simple, but the connection is prone to looseness and requires frequent maintenance
Solution Approach 1:
The limiting fastener is pre-installed on the connecting member, and the rivet is prepared in advance. During assembly, these pre-prepared components are simply snapped and fixed into place, reducing assembly complexity while ensuring durable connection that resists loosening over time.
Solution Approach 2:
The limiting fastener acts as an intermediary element between the connecting member and connecting seat, providing a snap connection mechanism that simplifies assembly while enhancing durability. The rivet serves as another intermediary to permanently fix the connecting member in place.
3Strength
If threaded fit connection is used, then the structure is simple, but it cannot withstand large external forces effectively
Solution Approach 1:
The reinforcing plate is placed at the connecting portion where external forces are most concentrated, providing localized strength enhancement. The limiting fastener and rivet are positioned at critical connection points to maximize force resistance where needed most.
Solution Approach 2:
The connecting assembly combines multiple materials and connection methods: plastic or metal for the connecting member and seat, snap connection mechanism for flexibility, rivet for permanent fixation, and reinforcing plate for structural strength. This composite approach creates a connection that can withstand large external forces.
Data Source
AI summary
A shovel handle connecting device includes a connecting assembly configured to connect a shovel handle and a shovel scoop. The connecting assembly includes a connecting seat embedded in the shovel scoop and a connecting member inserted and fixed in the connecting seat; a front end of the connecting member is provided with a connecting portion and a limiting portion, a limiting fastener is arranged on the connecting portion; the connecting seat is internally provided with a connecting groove allowing the connecting portion to be inserted therein, and an inner wall of the connecting groove is provided with a limiting groove allowing the limiting fastener to be snapped therein; an outer side wall of the limiting portion and an inner side wall of the connecting seat are formed into an accommodating cavity in an enclosure mode, and one end of the shovel handle is inserted and fixed in the accommodating cavity.