Excavator Stick Mounting Layout With Lowered Rotation Axis
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Solution Overview
Problem
Existing excavator mounting devices have a large overall height, impairing the pivoting movement and requiring a large swivel range, which limits the flexibility and efficiency of attachment operations.
Innovation Solution
A mounting device design with a plane of rotation formed between the drive housing and the coupling, where the attachment bearing point is positioned in this plane or adjacent to it, allowing the axis of rotation to be lowered, and the coupling bearing point is positioned above, enabling direct power transmission and improved leverage ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the attachment bearing point and coupling bearing point are positioned high on the drive housing, then power transmission is improved, but the overall height increases impairing pivoting movement
Solution Approach 1:
The patent repositions the attachment bearing point from a high vertical position to a location in the plane of rotation or below it, fundamentally changing the spatial dimension of force application. This dimensional shift allows the coupling bearing point to remain high for power transmission while the attachment point operates in a lower plane, resolving the contradiction between height and power transmission.
Solution Approach 2:
Instead of positioning both bearing points high to achieve power transmission, the patent inverts the arrangement by placing the attachment bearing point in the plane of rotation or below it, while maintaining the coupling bearing point high. This inverted configuration achieves power transmission through the high coupling point while avoiding the height penalty of having both points elevated.
2Ease of operation
If the overall height of the mounting device is reduced, then pivoting movement is improved, but power transmission efficiency may be compromised
Solution Approach 1:
The patent resolves this contradiction by operating in multiple vertical planes: the coupling bearing point remains high in one plane for efficient power transmission, while the attachment bearing point is positioned in the plane of rotation or below it in a lower plane. This multi-plane arrangement maintains both pivoting freedom and power transmission efficiency simultaneously.
Solution Approach 2:
The mounting device is segmented into functionally distinct zones: the upper region houses the coupling bearing point for power input, while the lower region contains the attachment bearing point for implement connection. This segmentation allows each zone to be optimized for its specific function without compromising the other.
3Length of moving object
If the attachment bearing point is positioned in the plane of rotation, then the axis of rotation can be lowered, but the coupling bearing point must be positioned above the connection plane
Solution Approach 1:
The patent employs dimensional separation by positioning the attachment bearing point in the plane of rotation (lower dimension) while the coupling bearing point occupies a higher vertical dimension above the connection plane. This vertical stratification simplifies the overall axis of rotation height while managing the complexity through clear functional zoning.
Data Source
AI summary
Mounting device for a stick of an excavator, with a rotary device which comprises a drive housing with a rotary drive with a coupling device arranged at least partially on an upper cover surface of the drive housing, which comprises an attachment bearing point for connection to the stick. The attachment bearing point of the coupling device is arranged in a fictitious connection plane or in a plane of rotation or between the fictitious connection plane and the plane of rotation.