Mower Motor Mount Deck Heat Discharge and Soundproofing
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Solution Overview
Problem
Existing grass mower technologies face inefficiencies in cooling electric motors and suppressing solid propagation noise, with inadequate heat dissipation and ineffective soundproofing of the mower deck.
Innovation Solution
The mower unit incorporates a mount deck with heat discharging fins and a gapless fitting sheet for efficient heat transfer, and a soundproof sheet directly attached to the mower deck to absorb solid propagation sound, with a label sheet for aesthetic integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat is transmitted via the mount deck to the mower deck for cooling, then cooling function is provided, but cooling efficiency is insufficient
Solution Approach 1:
The invention transitions from single-path heat transmission through the mount deck to a multi-dimensional heat dissipation system. Heat is transmitted through the mount deck to the mower deck while simultaneously being conducted to heat discharge fins that extend into airflow paths, creating multiple heat dissipation dimensions and significantly improving cooling efficiency.
Solution Approach 2:
The invention introduces heat discharge fins as intermediary elements between the mount deck and the airflow. These fins act as extended heat exchange surfaces that mediate heat transfer from the motor through the mount deck to the surrounding air, enhancing the overall heat dissipation efficiency without requiring direct air contact with the motor housing.
2Strength
If the mower deck is made as a solid structure for strength, then structural integrity is maintained, but solid propagation sound is transmitted and discharged
Solution Approach 1:
The invention applies local quality modification by attaching soundproof sheets to specific areas of the mower deck, particularly the top plate and side plates. These soundproof sheets have different acoustic properties than the metal deck, creating localized zones that absorb and dampen solid propagation sound while maintaining the overall structural integrity of the mower deck.
Solution Approach 2:
The invention creates a composite structure by combining the metal mower deck with soundproof sheet materials. This composite construction allows the metal deck to maintain its structural strength while the soundproof sheets provide acoustic damping properties, effectively reducing noise discharge without compromising structural integrity.
3Object-generated harmful factors
If a large soundproof member is attached to the mower deck for noise suppression, then soundproofing area is increased, but the member itself vibrates and reduces effectiveness
Solution Approach 1:
The invention uses thin film soundproof sheets that are flexible rather than rigid. These thin films conform to the mower deck surface and are less prone to vibration and resonance compared to large rigid soundproof members. The flexibility of the thin films allows them to dampen vibrations rather than amplify them, maintaining soundproofing effectiveness.
Solution Approach 2:
The soundproof sheets are pre-attached to the mower deck structure before operation. This preliminary attachment ensures proper positioning and tensioning, preventing the sheets from flapping or vibrating excessively during mower operation. The pre-installation allows for optimal acoustic coupling between the sheets and the deck structure.
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 solution provides enhanced cooling efficiency for the mower motor and significant noise reduction by effectively dissipating heat and absorbing sound vibrations, improving operational performance and user experience.
Implementation Method 1
heat generated at the mower motor is conducted to the mount deck and discharged to the outside
Implementation Method 2
heat generated at the mower motor is conducted to the mount deck and discharged to the outside
Implementation Method 3
a soundproof sheet stuck to a plate face of the mower deck
Data Source
AI summary
A mower unit 3 includes a rotational shaft extending upwards through a top wall of a mower deck, a cutter blade attached to a lower portion of the rotational shaft, a mower motor 4 having a rotor 43 disposed upward and a coil 42 disposed downward along an axial direction of an output shaft 41, a mount deck 5 having a horizontal mounting face for mounting the mower motor 4 in such a manner that the output shaft 41 assumes a vertical posture, the mount deck protruding outwards from a side wall of the mower deck, and a cooling arrangement 50 incorporated in the mound deck 5 for discharging heat of the mower motor 4.