Turf Aerator Belt Servicing via Threaded Coupling Actuation

Solution Overview

Problem

Existing turf aerators require cumbersome and labor-intensive processes for servicing and replacing belts, often necessitating the removal of heavy crankshafts and requiring multiple operators, which is time-consuming and hazardous.

Innovation Solution

A turf aerator design featuring a tine crank with internal threads and a coupling system that allows the belt to be easily accessed and replaced without removing the crankshaft, using an actuator to move the coupling from an extended to a retracted position, enabling single-operator belt servicing without a hoist.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of repair

If the traditional belt servicing method is used, then the belt can be replaced, but the crankshaft must be removed and multiple operators are required, which is time-consuming and hazardous

Engineering Contradiction:

Core Design Contradiction:

Ease of repairVSDevice complexity

Solution Approach 1:

The device is segmented into modular components: the coupling assembly (with coupling arm, coupling head, and actuator) is separated from the crankshaft assembly. This allows the coupling to be independently adjusted and the belt to be serviced without removing the heavy crankshaft, thereby simplifying the repair procedure while maintaining structural integrity of the overall device.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The coupling assembly acts as an intermediary mechanism between the power source and the tine crank. By introducing the adjustable coupling arm and actuator system, the patent enables belt replacement without direct manipulation of the crankshaft, reducing the complexity and hazard of the repair process while still achieving the necessary disassembly for belt access.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If the crankshaft is removed for belt replacement, then the belt can be accessed, but heavy lifting and multiple operators are required

Engineering Contradiction:

Core Design Contradiction:

Ease of operationVSWeight of moving object

Solution Approach 1:

The coupling assembly is extracted as a separate, independently adjustable component from the crankshaft assembly. The coupling arm can be moved between extended and retracted positions relative to the crankshaft, allowing belt access without extracting or lifting the heavy crankshaft itself. This extraction of the coupling function from the crankshaft reduces the weight that must be moved during maintenance.

Inventive Principle:

Principle #2Taking out (Extraction)

3Ease of repair

If multiple operators are used for crankshaft removal, then the belt can be replaced, but the process becomes labor-intensive and hazardous

Engineering Contradiction:

Core Design Contradiction:

Ease of repairVSProductivity

Solution Approach 1:

The coupling assembly incorporates an actuator mechanism that enables single-operator adjustment of the coupling arm position. The actuator allows the coupling to be moved from extended to retracted position without requiring multiple operators to manually position and secure heavy components, thereby enabling self-service maintenance by a single technician while improving productivity.

Inventive Principle:

Principle #25Self-service

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 quicker and safer belt servicing by allowing the belt to be replaced without lifting the crankshaft, reducing the need for multiple operators and minimizing the time and effort required for maintenance.

Implementation Method 1

An actuator is threaded complementary to the threads of the tine crank clearing end for selectively moving the coupling from an extended position relative to the crank to a retracted position relative to the tine crank

Methodology Applied

Scientific EffectMechanical Advantage: Mechanical Advantage

Data Source

PatentUS10918003B2Turf aerators and assemblies for same

Publication Date: 2021.02.16

AI summary

A turf aerator includes a frame, a tine crank having a clearing end with threads, a plurality of tines coupled to the tine crank, and a coupling for fastening the tine crank clearing end to the frame. The coupling includes a collar area for receiving the tine crank clearing end, an anchor plate for selectively fastening to the frame, and an opening sized for accessing the threads of the tine crank clearing end. The turf aerator further includes an actuator threaded complementary to the threads of the tine crank clearing end for selectively moving the coupling from an extended position relative to the tine crank to a retracted position relative to the tine crank.