Mower Motor Cooling via Deck Airflow Passage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional mowers with motor-driven rotary blades face challenges in effectively cooling the motor, leading to heat management issues during operation.
Innovation Solution
The mower design incorporates a motor with a casing member and rotor/stator positioned within the mower deck, along with a fan and guide members that create an airflow passage connecting the interior and exterior, allowing for effective cooling of the motor through airflow generated by the rotary blade and fan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the motor is positioned outside the mower deck for easy access and maintenance, then ease of operation is improved, but heat dissipation is insufficient leading to poor cooling
Solution Approach 1:
The motor is nested within the mower deck interior, with the casing member positioned inside the deck housing. This allows the motor to be surrounded by airflow paths formed by the deck structure, achieving effective cooling while maintaining accessibility through strategic positioning near the deck opening.
Solution Approach 2:
The casing member acts as an intermediary structure that bridges the motor and the mower deck interior. It provides a thermal interface that allows heat transfer from the motor to the surrounding airflow, while also serving as a mounting structure that positions the motor optimally within the deck for both cooling and accessibility.
2Temperature
If the motor is positioned inside the mower deck for effective cooling, then heat dissipation is improved, but accessibility for maintenance becomes difficult
Solution Approach 1:
The motor is nested within the mower deck interior, positioned to maximize exposure to cooling airflow while maintaining access through the deck opening. The casing member is designed to fit within the deck's internal space, allowing maintenance personnel to reach the motor through existing access points without requiring complete disassembly.
Solution Approach 2:
The casing member is designed with differentiated regions: one portion extends toward the deck opening to facilitate maintenance access, while another portion remains within the deck interior to maximize cooling exposure. This local differentiation allows the motor to simultaneously achieve both cooling efficiency and maintainability.
3Temperature
If airflow passage is created through guide members and fins to improve cooling, then heat dissipation is improved, but device complexity increases
Solution Approach 1:
The guide members and fins are designed to serve multiple functions: they form airflow passages for cooling the motor, structural support for the motor mounting, and heat dissipation surfaces. The casing member itself acts as both a protective enclosure and a thermal management component, reducing the need for separate dedicated cooling structures.
Solution Approach 2:
The cooling structures (guide members, fins) are merged with the motor casing and mower deck structure rather than being separate add-on components. The fins are integrated into the casing member, and the guide members are positioned to utilize existing deck structures, combining cooling functionality with structural elements already present in the mower.
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
This configuration effectively cools the motor by increasing airflow and surface area, dissipating heat efficiently and preventing foreign bodies from obstructing the cooling process, thus maintaining motor performance.
Implementation Method 1
a fan, which sends air from the exterior of the mower deck to the interior via the air flow passage
Implementation Method 2
The motor can be cooled effectively by the airflow generated within the mower deck accompanying rotation of the rotary blade
Implementation Method 3
The casing member of the motor can be cooled by air flowing within the mower deck
Data Source
AI summary
A mower includes a rotary grass cutting blade. A mower deck houses the rotary blade in an interior thereof. A motor has at least a portion thereof positioned or extending into the interior of the mower deck. The motor rotationally drives the rotary blade. A guide member can be utilized to form an air flow passage along the motor, with the air flow passage connecting the interior and exterior of the mower deck.