Snow Thrower Gear Drive Layout for Compact High-Efficiency Clearing
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Solution Overview
Problem
Self-propelled single-stage snow throwers in the art are driven by belts, resulting in low snow removal efficiency, a complex machine structure, and a large machine size.
Innovation Solution
A snow thrower design featuring a first drive shaft with auger blades, a second drive shaft with an impeller, and a walking wheel assembly, powered by two motors with reduction assemblies for efficient power transmission, including a first reduction assembly with first-type gears and a second reduction assembly with second-type gears, to enhance efficiency and compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If belt-driven mechanism is used in self-propelled single-stage snow throwers, then the machine structure becomes complex and machine size increases, but snow removal efficiency decreases
Solution Approach 1:
The patent extracts and eliminates the belt-driven mechanism from the snow thrower design, replacing it with a direct-drive system. This removal of the intermediate belt transmission component simplifies the overall machine structure, reduces the number of parts, and directly improves snow removal efficiency by eliminating energy loss and mechanical complexity associated with belt drives.
Solution Approach 2:
Instead of using a belt to transmit power from the motor to the auger and impeller, the patent inverts the approach by directly coupling the motor output shaft to the drive shafts. This inversion of the power transmission method eliminates the need for belts and simplifies the mechanical structure while improving efficiency.
2Productivity
If belt-driven mechanism is used in self-propelled single-stage snow throwers, then the machine structure becomes complex, but snow removal efficiency decreases
Solution Approach 1:
The patent removes the belt-driven mechanism and its associated components (belts, pulleys, tensioners) from the snow thrower design. This extraction of unnecessary components directly reduces the machine's overall volume and size while simultaneously improving snow removal efficiency through a more compact and efficient direct-drive power transmission system.
3Device complexity
If dual motors with reduction assemblies are used, then power transmission efficiency improves and machine becomes more compact, but device complexity increases
Solution Approach 1:
The patent merges the functions of power transmission and speed reduction into integrated reduction assemblies that are directly coupled to the motors. By combining these functions in a unified compact structure rather than using separate belt-driven components, the design achieves improved power transmission efficiency and compactness while managing the inherent complexity through functional integration.
4Ease of manufacture
If belt-driven mechanism is used, then machine structure becomes complex, but manufacturing cost increases
Solution Approach 1:
The patent extracts and eliminates the belt-driven mechanism, which involves multiple components (belts, pulleys, tensioners, alignment systems) that increase both manufacturing complexity and cost. By removing these components and adopting a direct-drive system with integrated reduction assemblies, the design simplifies manufacturing processes and reduces overall production costs.
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 design achieves higher snow removal efficiency with a more compact and balanced machine structure, ensuring even snow throwing and improved operational performance.
Implementation Method 1
a first reduction assembly including first-type gears for realizing power transmission between the second motor and the second drive shaft
Implementation Method 2
a second reduction assembly including second-type gears for realizing power transmission between the second drive shaft and the first drive shaft
Implementation Method 3
an auger having auger blades mounted to the first drive shaft; a second motor configured to drive the auger to rotate about the first axis
Implementation Method 4
an impeller having an impeller base mounted to the second drive shaft and impeller blades mounted to the impeller base; the second axis and the first axis being perpendicular to each other
Data Source
AI summary
A snow thrower includes a first drive shaft enabled to rotate about a first axis; an auger having auger blades mounted to the first drive shaft, a second drive shaft enabled to rotate about a second axis, an impeller having an impeller base mounted to the second drive shaft and impeller blades where the second axis and the first axis are perpendicular to each other, a walking wheel assembly, a first motor configured to drive the walking wheel assembly to rotate, a second motor configured to drive the auger to rotate about the first axis and drive the impeller to rotate about the second axis, a first reduction assembly including first-type gears for realizing power transmission between the second motor and the second drive shaft, and a second reduction assembly including second-type gears for realizing power transmission between the second drive shaft and the first drive shaft.