Dual-Blade Mower Phase Synchronization for Complete Cutting
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Solution Overview
Problem
Dual-blade mowers often experience blade collisions and leave uncut grass due to intersecting rotation trajectories, leading to inefficiencies in cutting performance.
Innovation Solution
A mower design featuring a synchronization member connected to two electric motors driving the blades, ensuring a phase difference greater than 0 and less than 90 degrees, with blades positioned to avoid collisions and enhance cutting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If two blades are disposed in two cutting decks one to one, then the cutting coverage is improved, but the blades may collide with each other when rotation trajectories intersect
Solution Approach 1:
The patent applies preliminary action by pre-adjusting the rotation phase difference between the two blades to be greater than 0度和 less than 90度. This phase difference is established before operation begins, ensuring that the rotation trajectories of the two blades do not intersect, thereby preventing collisions while maintaining cutting coverage.
2Reliability
If the rotation trajectories of the two blades do not intersect, then blade collision is prevented, but uncut grass may be left behind
Solution Approach 1:
The patent applies parameter changes by precisely controlling the rotation phase difference parameter to be greater than 0度和 less than 90度. This specific parameter range ensures that the rotation trajectories do not intersect (preventing collision) while still maintaining sufficient overlap in cutting paths to prevent uncut grass. The phase difference is adjusted to optimize both collision prevention and cutting completeness.
3Reliability
If a synchronization member is added to control phase difference, then blade collision is prevented, but device complexity increases
Solution Approach 1:
The patent applies the intermediary principle by introducing a synchronization member as a mediator between the two motor assemblies. This synchronization member (such as a synchronization gear or belt) couples the two motors to maintain a fixed phase difference greater than 0度和 less than 90度, ensuring coordinated rotation without requiring complex electronic control systems. The mechanical intermediary provides reliable phase synchronization with minimal added complexity.
Data Source
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AI summary
Provided is a mower. The mower includes: a body including a housing assembly; a cutting element used for performing a cutting function and including a first blade and a second blade; a chassis for accommodating at least part of the cutting element; a drive assembly including a first electric motor configured to drive the first blade and a second electric motor configured to drive the second blade; and a battery pack configured to power the drive assembly. The mower further includes a synchronization member drivingly connected to the first electric motor and the second electric motor. With the preceding technical solution, the mower can be provided, where blades in two cutting decks do not collide with each other, and uncut grass is prevented from being left behind.