Log Splitter Actuation Assembly for Automatic Rack Reset
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Solution Overview
Problem
Existing log splitters require manual initiation and resetting of the driving force, and lack automated safety and reset systems, posing risks to operators during operation.
Innovation Solution
An actuation assembly with a safety lever, engagement lever, and trigger lever, coupled with a motor and spring system, allows for automated actuation and reset of the rack, ensuring operator safety by disconnecting manual input from engagement actions and preventing kickback events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual initiation and resetting of driving force is used, then device complexity is reduced, but operator safety and ease of operation deteriorate due to manual tasks and kickback risks
Solution Approach 1:
The system performs automatic resetting of the rack when the log is fully split, eliminating the need for manual intervention. The safety lever automatically returns to the engaged position after the rack reaches the retracted position, and the motor automatically reverses direction to drive the rack back, making the system self-servicing and improving operator safety
Solution Approach 2:
The safety lever acts as an intermediary mechanism between the operator and the rack engagement. It provides a controlled interface that prevents direct manual contact with moving parts during engagement and resetting operations, thereby protecting the operator from kickback and mechanical hazards
2Ease of operation
If automated actuation assembly is implemented, then ease of operation and safety improve, but device complexity increases
Solution Approach 1:
The safety lever combines multiple functions into a single component: it controls rack engagement, provides safety protection, and enables automatic resetting. The trigger lever integrates the operator's input control with the safety lever mechanism, allowing automated operation while reducing the number of separate control components needed
3Object-affected harmful factors
If safety lever and trigger lever system is used, then operator protection from kickback improves, but manufacturing complexity increases
Solution Approach 1:
The actuation assembly is divided into distinct functional segments: the safety lever for engagement control, the trigger lever for operator input, and the engagement lever for rack actuation. This segmentation allows each component to be manufactured and assembled separately, simplifying the manufacturing process while maintaining safety functionality
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 assembly provides automated actuation and reset, reducing operator risk and wear on components, while ensuring efficient and safe operation of the log splitter.
Implementation Method 1
a lower spring coupled to the engagement crank, wherein the lower spring rotates the engagement lever via the engagement crank in the first direction such that the lower spring goes over center
Data Source
Figure 1A~1B
Figure 1C~2A
Figure 2B
AI summary
A log splitter is provided. The log splitter includes a housing, a power source, a motor within the housing and electrically coupled to the power source, a support arm coupled to and at least partially within the housing, a rack coupled to at least a portion of the support arm, and an actuation assembly at least partially within the housing and coupled to the motor and the rack. The power source may include at least one battery. The support arm extends between a first end and a second end. The rack is configured to move along the support arm in a forward direction to an extended position adjacent the first end of the support arm and a reverse direction toward to a starting position adjacent the second end of the support arm. The actuation assembly is configured to move the rack at least in the forward direction.