Spring-Loaded Pin Apparatus for Lawnmower Handle Adjustment
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Solution Overview
Problem
Conventional pin apparatuses for adjusting machine handles on walk-behind machines like lawnmowers are complex and require manual assembly, making it difficult for customers to easily set up and adjust the handles without professional assistance.
Innovation Solution
A pin apparatus comprising a housing with a movable pin body and a handle that allows the pin to transition between extended and retracted positions, utilizing a biasing member like a spring for easy alignment and adjustment with a positioning plate, enabling secure positioning of the machine handle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional bolts and knobs are used for handle adjustment, then secure positioning is achieved, but assembly complexity and setup difficulty increase
Solution Approach 1:
The pin apparatus is designed to be self-aligning and self-locking. The pin automatically extends into positioning holes to secure the handle at the correct angle without requiring manual alignment or complex assembly procedures. The spring-loaded mechanism self-services the positioning function that previously required manual bolt tightening.
Solution Approach 2:
The invention extracts the essential positioning function from the complex bolt-and-knob assembly system. By using a simple pin that extends into predetermined holes in the positioning plate, the patent eliminates the need for threaded bolts, nuts, and multiple adjustment steps, reducing assembly complexity while maintaining secure positioning.
2Manufacturing precision
If manual assembly is required for handle setup, then adjustment precision can be controlled, but setup time and customer convenience deteriorate
Solution Approach 1:
The positioning plate is pre-drilled with precisely located holes at the correct angles for handle positioning. This preliminary preparation eliminates the need for manual measurement and alignment during setup. The pin simply needs to be extended to engage these pre-positioned holes, dramatically reducing setup time while maintaining manufacturing precision.
Solution Approach 2:
The pin apparatus performs the positioning function automatically once engaged. The spring-loaded pin self-extends into the predetermined holes and locks the handle at the correct angle without requiring customer intervention or specialized assembly knowledge, reducing both setup time and the skill level required.
3Ease of operation
If simple pin mechanisms are used, then ease of operation improves, but positioning reliability may deteriorate
Solution Approach 1:
The pin features a curved or tapered portion that guides engagement with the positioning holes. This geometric feature ensures reliable insertion and positioning while maintaining ease of operation. The curved surface allows the pin to self-align and smoothly engage with the holes in the positioning plate.
Solution Approach 2:
The pin is divided into distinct functional segments: a curved guiding portion for easy engagement, a cylindrical body for positioning, and a spring-loaded actuation mechanism. This segmentation allows each portion to optimize its specific function, ensuring both ease of operation and positioning reliability.
4Manufacturing precision
If complex assembly procedures are used, then positioning accuracy can be achieved, but device complexity and assembly difficulty increase
Solution Approach 1:
The invention extracts the positioning accuracy requirement from the complex assembly process. By using a pin that engages with pre-drilled holes in a positioning plate, the patent achieves positioning accuracy without requiring complex manufacturing or assembly procedures. The simplicity of the pin-and-hole mechanism makes it easy to manufacture and assemble while maintaining precision.
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
Facilitates easy and secure adjustment of machine handles on walk-behind machines, allowing customers to set up and align handles without complex assembly, enhancing user convenience and reducing setup time.
Implementation Method 1
A compression spring (44) surrounds each locking pin (41) between a lateral flange (42) and a spring abutment (46) in order for the locking pin (41) to be urged inwardly toward the opening (38)
Data Source
AI summary
Pin apparatuses and methods are disclosed having particular suitability for use with machine handles such as those associated with walk-behind machines such as lawnmowers. A pin apparatus may include a housing defining an opening for receiving at least a portion of a pin. The pin may include an elongated pin body having a proximal end section and a distal end section. The pin apparatus may further include a pin handle external from the housing for moving the pin within the housing. At least a portion of the pin body can be positioned at least partially through a machine handle and at least a portion of the housing can be positioned outside of the machine handle. Rotation of the pin handle can move the pin between the extended position and the retracted position.