Split Sprocket Track Drive for Outdoor Power Equipment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current track drives for outdoor power equipment face issues such as lateral derailment, drive lug skipping, and backlash during load and direction reversals, as well as limitations in converting wheeled configurations to tracked configurations, leading to lower travel speed, higher centers of gravity, and increased stress on the traction drive system.
Innovation Solution
A track drive system featuring a support frame with a drive axle, hub bearing, and split sprockets that include interior and exterior half sprockets, allowing for easier installation and reduced slippage, along with an endless track and idler wheels, which maintains traction and stability by distributing weight evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If unitary sprockets are used in track drives, then structural simplicity is maintained, but installation and removal become difficult
Solution Approach 1:
The sprocket is divided into two separate half-sprockets that can be independently installed and removed from the track, making maintenance and installation significantly easier while maintaining structural integrity during operation
2Productivity
If conventional track drives are used, then basic propulsion is achieved, but lateral derailment and drive lug skipping occur
Solution Approach 1:
The drive teeth are designed with dynamic engagement features including curved surfaces and varying pressure angles that adapt to load conditions, preventing lateral derailment and drive lug skipping while maintaining effective propulsion
Solution Approach 2:
The hub bearing acts as an intermediary element between the drive axle and support frame, providing precise alignment and reducing friction that could cause track instability and derailment
3Force
If wheeled configurations are converted to tracked configurations, then traction is improved, but travel speed decreases and center of gravity increases
Solution Approach 1:
The track drive system is designed with optimized parameters including drive sprocket diameter, track width, and gear ratios that maintain travel speed while improving traction, avoiding the typical speed loss associated with tracked vehicle conversions
4Productivity
If conventional track drives are used, then propulsion is achieved, but backlash impacts occur during load and direction reversals
Solution Approach 1:
The drive teeth incorporate dynamic engagement features with curved surfaces and varying pressure angles that eliminate backlash impacts during load and direction reversals, providing smooth and continuous power transmission
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 enhances the performance of outdoor power equipment by reducing lateral derailment, maintaining traction, and evenly distributing weight, resulting in improved speed and handling characteristics without the need for gear adjustments or increased height.
Implementation Method 1
a hub bearing mounted on the drive axle and the support frame. The hub bearing enables the drive axle to rotate relative to the support frame
Implementation Method 2
The drive sprocket is movably engaged with the endless track to transmit force to rotate the endless track and propel the outdoor power equipment
Data Source
AI summary
Provided is a track drive for outdoor power equipment including a support frame and a drive axle configured to attach to an associated drive hub. A hub bearing is mounted on the drive axle and the support frame enabling the drive axle to rotate relative to the support frame. A drive sprocket is attached to the drive axle and includes an interior half sprocket and an exterior half sprocket. The half sprockets are located on either side of the support frame. Drive teeth are spaced radially about the drive sprocket. The drive sprocket is movably engaged with an endless track to transmit force to rotate the endless track and propel the outdoor power equipment. A kit for adding or replacing a track drive of outdoor power equipment is also provided.