Modular Transmission System for Boring Machine Spindle Feed
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Solution Overview
Problem
Existing drilling machines, particularly those for industrial use, face challenges in achieving flexible and adjustable axial spindle feed, which is essential for varying drilling applications and materials, due to the complexity and inflexibility of current transmission systems like epicyclic gear trains, making them costly and difficult to produce and assemble.
Innovation Solution
A modular transmission system using a gearwheel arrangement without an internal gear or internal toothed rim, where a displacement wheel interacts with a displacement nut via an outer threaded section, allowing for different transmission translations by replacing gearwheels, thereby simplifying assembly and adaptation to various drilling requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If epicyclic gear trains are used for integrated transmission, then both rotational drive and axial displacement can be achieved, but the device becomes technologically demanding and constructively sophisticated
Solution Approach 1:
The patent divides the transmission system into separate functional modules: a rotational drive unit and an axial displacement unit, each with its own transmission path. This segmentation allows independent optimization of each function while reducing the overall structural complexity compared to integrated epicyclic gear trains.
Solution Approach 2:
The patent introduces a rack and pinion mechanism as an intermediary between the axial displacement motor and the spindle. The pinion converts rotational motion to linear motion, serving as a simple mediator that achieves axial displacement without requiring complex epicyclic gear arrangements.
2Reliability
If epicyclic gear trains are used for integrated transmission, then transmission functionality is achieved, but production becomes difficult for series production
Solution Approach 1:
By segmenting the transmission system into standardizable modules (rotational drive module, axial displacement module), each can be manufactured independently using conventional machining processes, facilitating series production while maintaining reliable transmission functionality.
Solution Approach 2:
The patent employs simpler, more easily manufactured components such as standard gearwheels and rack mechanisms that can be produced cost-effectively in large quantities, replacing the expensive and difficult-to-manufacture epicyclic gear trains for series production applications.
3Device complexity
If fixed transmission translation is used, then construction is simplified, but adaptability to different drilling applications is reduced
Solution Approach 1:
The patent incorporates adjustable transmission elements, specifically variable pitch rack sections and interchangeable gearwheels, that allow the transmission translation to be dynamically adapted to different drilling applications while maintaining relatively simple construction.
Solution Approach 2:
The transmission system is designed with universal components that can serve multiple functions: the same basic rack and pinion mechanism can accommodate different pitch values and gearwheel configurations to handle various drilling requirements, from metal to composite materials.
4Volume of moving object
If internally toothed components are used, then transmission compactness is achieved, but production and assembly become expensive and sophisticated
Solution Approach 1:
The patent replaces expensive internally toothed components with externally toothed gearwheels and racks that can be manufactured using standard machining processes, significantly reducing production costs and simplifying assembly while maintaining acceptable compactness.
Solution Approach 2:
Instead of achieving compactness through internal toothing in the radial dimension, the patent arranges the externally toothed components along the axial dimension, distributing the transmission elements in a linear sequence that reduces manufacturing complexity while maintaining a compact overall footprint.
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
This solution enhances the flexibility and simplifies the assembly of drilling machines by allowing for interchangeable gearwheels, reducing production costs and complexity, while enabling adaptable transmission translations for different drilling applications, including those with modern materials like composite plastics used in aircraft manufacturing.
Implementation Method 1
a gearwheel arrangement (42, 46) without an internal gear or internal toothed rim, wherein a displacement wheel (54) interacts with a displacement nut (58) via an outer threaded section
Implementation Method 2
a displacement wheel (54) interacts with a displacement nut (58) via an outer threaded section
Data Source
AI summary
The invention relates to a boring machine comprising a spindle (15) which is designed for rotationally driving a boring tool that is placed or can be placed on the spindle and which is paired together with rotational drive means that interact with a first drive motor (24) for rotational driving purposes and with adjustment drive means that interact with a second drive motor (26) for axially adjusting the spindle such that when the spindle is being rotated by the first drive motor, the spindle can be axially adjusted under the effect of the second drive motor. The rotational drive means have a rotational drive gear (38) which is connected to the spindle, and the adjustment drive means have an adjustment nut (58) which interacts with a threaded section (60) of the spindle (15) in the manner of a slide. Transmission means are integrated in the form of a transmission module for interacting with the rotational drive gear and the adjustment nut and are designed to connect to the first and the second drive motor. The transmission means have an adjustment gear (54) for meshing into a toothing of the adjustment nut (58), said adjustment gear being driven by a toothed gear assembly (46, 42) which engages onto an outer toothing (52) of the adjustment gear such that at least one first toothed gear (42a-c) of the toothed gear assembly receives a drive torque of the second drive motor, in particular the at least one first toothed gear interacts directly with a drive shaft (30) of the second drive motor (24, 24A), and at least one second toothed gear (46a-c, 46′a-c) of the toothed gear assembly transmits a drive torque of the first toothed gear (26, 26k) to the outer toothing (52), in particular the at least one second toothed gear meshes directly with the first toothed gear and the outer toothing. The toothed gear assembly is held in a cage-like toothed gear support (44) such that at least the second toothed gear, preferably the first and the second toothed gear, can be released from the transmission module and replaced when disassembling the adjustment gear and/or a module which drives the rotational drive gear, in particular a toothed gear unit.