Integrated Steerable Knuckle for Track Drive Systems
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Solution Overview
Problem
Existing steerable knuckle designs for machinery with track drives face challenges in providing structural support and efficient power transmission, often requiring external bearing supports and additional hardware, which can complicate the transition from wheel to track drive systems and limit adaptability to different tread settings.
Innovation Solution
A single, integrated steerable knuckle design that includes a hollow spindle, undercarriage support arms, king pin connections, a steering cylinder, tie rod connections, and adjustable steering stops, allowing for both power transmission to a drive wheel and structural support to the vehicle undercarriage, while enabling multiple tread settings through adjustable mounting holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an external bearing support is used to connect the drive wheel to the undercarriage, then structural support is provided, but the device complexity increases due to extra bearing support and hardware
Solution Approach 1:
The patent merges the bearing support function directly into the knuckle assembly by integrating a bearing housing and bearing elements within the knuckle structure itself. This eliminates the need for separate external bearing supports and their associated mounting hardware, thereby reducing device complexity while maintaining structural support capability.
Solution Approach 2:
The knuckle assembly is designed to perform multiple functions: it provides steering rotation, supports the drive wheel through integrated bearing elements, and connects to the undercarriage. This multi-functional design eliminates the need for dedicated external bearing supports, as the knuckle itself serves as the structural connection point.
2Power
If external bearing support and hardware are added, then power transmission is enabled, but the quantity of components increases
Solution Approach 1:
The bearing housing and bearing elements are integrated directly into the knuckle assembly, combining the power transmission function with the steering mechanism. This eliminates the need for separate external bearing supports and mounting hardware, thereby reducing the total quantity of components while enabling effective power transmission from the drive wheel to the undercarriage.
3Stability of the object's composition
If external oscillation stops are added to prevent track undercarriage pivoting, then stability is improved, but device complexity increases
Solution Approach 1:
The oscillation stop function is integrated into the knuckle assembly through built-in structural features that limit the pivoting range of the track undercarriage. This eliminates the need for separate external oscillation stops, thereby maintaining stability while reducing device complexity.
4Device complexity
If a one-piece integrated knuckle solution is used, then device complexity is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The knuckle assembly is designed as a one-piece integrated structure that combines the steering knuckle, bearing housing, and mounting features into a single manufactured component. This integration reduces device complexity by eliminating the need to assemble multiple separate parts, although it does require higher manufacturing precision for the single complex component.
Data Source
AI summary
A steerable knuckle, and an axle and track drive assembly including the knuckle, is disclosed. A driveshaft rotatable about a rotational axis extends through the knuckle. The knuckle pivots about a steering axis generally perpendicular to the rotational axis. The driveshaft extends through an axle housing, and a hub is coupled to the driveshaft. The track drive includes a drive wheel, a drive frame, rollers, and a track. Rotation of the driveshaft about the rotational axis rotates the hub and drive wheel which rotates the track about the drive wheel and rollers. Rotation of the knuckle about the steering axis turns the track drive. The knuckle can include a hollow spindle, one or more undercarriage support arm(s) for connecting the track drive frame, steering stops, and king pin, steering cylinder, and tie rod connections. The knuckle can be a single integrated piece.