Toy Loader Pivot Pin Assembly for Tool-Free Detachment
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Solution Overview
Problem
Existing children's toys with loading shovels have arms attached via a round metal rod that requires significant effort to detach and reattach, making storage and assembly cumbersome.
Innovation Solution
The use of two pins or bolts as the pivot axis, which can be easily inserted and removed without tools, secured by a detachable fastener, allowing quick assembly and disassembly of the loading shovel and its arms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a round metal rod with nuts and washers is used to pivotally attach the arms to the vehicle body, then a stable and secure attachment is achieved, but the attachment cannot be released easily and requires considerable work to detach
Solution Approach 1:
The single metal rod axis is segmented into two separate pins or bolts, each independently removable. This segmentation allows the loading shovel to be detached in a simplified manner while maintaining the stability provided by dual attachment points, directly resolving the contradiction between secure attachment and easy detachment.
2Reliability
If the loading shovel with arms is permanently attached to the children's vehicle, then stable operation is ensured, but storage space is wasted when the toy is not in use
Solution Approach 1:
The attachment system transitions from a permanent fixed state to a dynamic removable state. The pins or bolts can be easily removed to detach the loading shovel, allowing the toy to be compacted for storage or transport, while remaining securely attached during operation. This dynamic capability resolves the contradiction between operational stability and storage efficiency.
3Strength
If a round metal rod with threaded ends and nuts is used for the pivot axis, then a firm connection is achieved, but tool-aided assembly and disassembly are required
Solution Approach 1:
The nuts and washers are extracted from the attachment system, replaced by pins or bolts with simplified heads that can be directly manipulated by hand. This extraction maintains the firm connection through the pin structure itself while eliminating the need for threading tools, directly resolving the contradiction between connection strength and assembly simplicity.
4Reliability
If the arms are securely locked in a raised position, then stable loading operation is enabled, but quick release for storage is prevented
Solution Approach 1:
The pin or bolt structure with its protruding head enables the user to easily grasp and remove the attachment without tools. The simple geometric form provides both the locking function during operation and the easy release function for storage, resolving the contradiction between position stability and release speed through self-service design.
Data Source
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AI summary
The children's vehicle (17) has a loading shovel (1) held by two adjacent arms (2) that are pivotally attached to the vehicle body about an axis. The arms can hold the loading shovel (1) in a raised position, in which they are locked to the toy body. When the lock is released, the arms can lower the loading shovel (1). The axis is formed by two pins (3) that pass through holes in bearing sections (5) of the arms. When inserted, the pins (3) are not screwed in and are held in a light clamping fit, allowing them to be easily removed. No tools are required to remove and reassemble the loading shovel and its arms.