Rotational Drive Orientation for Horizontal Drilling Rod Assembly
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Solution Overview
Problem
Horizontal drilling devices face limitations in using long rod assembly sections due to the coaxial orientation of the changer motor, leading to increased time consumption and high costs associated with hydraulic cylinders, especially in compact excavation pits.
Innovation Solution
The solution involves a rotational drive that embraces the rod assembly sections, allowing for longer sections without the loss of length, and a form-fitting fixation to avoid sliding and reduce the need for hydraulic cylinders, enabling efficient attachment and release of rod assembly sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the changer motor is coaxially oriented to the rod assembly, then the rod assembly can be efficiently changed, but the length of the rod assembly sections is reduced and time consumption increases
Solution Approach 1:
The patent changes the spatial arrangement from coaxial (one-dimensional alignment) to perpendicular orientation. The rotational drive is positioned at right angles to the rod assembly axis, allowing the changer motor to operate without reducing rod assembly section length. This dimensional reconfiguration enables full-length rod sections while maintaining efficient changing capability.
2Force
If hydraulic cylinders are used to transmit forces to the rod assembly, then the rod assembly can be advanced and retracted, but the device complexity and costs increase
Solution Approach 1:
The patent extracts and eliminates the hydraulic cylinder system from the force transmission mechanism. Instead of using hydraulic cylinders to advance and retract the rod assembly, the invention employs a rotational drive with direct mechanical coupling that transmits forces more simply, reducing device complexity and costs while maintaining force transmission capability.
Solution Approach 2:
The patent replaces the hydraulic mechanical system with a purely mechanical rotational drive system. The rotational drive directly engages the rod assembly through mechanical coupling, eliminating the need for hydraulic cylinders and their associated control systems, thereby simplifying the overall mechanism.
3Productivity
If the rod assembly sections are made longer to reduce change frequency, then the drilling efficiency improves, but the risk of sliding during attachment and release increases
Solution Approach 1:
The patent employs asymmetric geometric features in the coupling mechanism between the rotational drive and rod assembly. The non-symmetric shape of the engagement surfaces and the offset positioning of the rotational drive create a form-fitting connection that prevents sliding during attachment and release, while still allowing efficient operation with longer rod assembly sections.
4Device complexity
If the rotational drive is positioned coaxially with the rod assembly, then the structure is simplified, but the rod assembly sections lose effective length
Solution Approach 1:
The patent resolves this contradiction by repositioning the rotational drive from coaxial alignment to perpendicular orientation. This spatial reconfiguration allows the rotational drive to operate independently of the rod assembly length, maintaining full effectiveness of the rod assembly sections while preserving structural simplicity through the elegant perpendicular arrangement.
Data Source
AI summary
A method for operating a horizontal drilling device includes the steps of fixing a rod assembly section within a through-opening formed by a rotational drive of the horizontal drilling device, and connecting the rod assembly section to a rear end of a drill rod assembly of the horizontal drilling device or releasing the rod assembly section from the drill rod assembly by a linear and/or rotational movement of the rotational drive, wherein force transmission means for transmitting compressive and/or pulling forces and/or a rotational torque to the drill rod assembly are provided in the through-opening, wherein the rotational drive is displaceable by a linear drive of the horizontal drilling device, and wherein the drill rod assembly is configured as rod assembly string and is composed of a plurality of interconnected rod assembly sections.