Gearbox Actuator Mounting for Compact Hammer Drill Design
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Solution Overview
Problem
Existing machine tool gear arrangements, particularly in hammer drills, require large installation spaces due to the need for significant distances between components to prevent collisions and inefficient use of space, especially in non-parallel motor and gear axis configurations.
Innovation Solution
A gear arrangement that utilizes an actuator with two receiving areas and shaft sections as bearing points, allowing axial displacement and rotation-proof mounting without additional bolts or rods, enabling compact design and efficient space utilization by separating torque transmission and wobble drive components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If significant clearance is maintained between the driven shaft, wobble bearing, and spur gear to prevent collisions, then the reliability of the gear arrangement is improved, but the installation space required increases significantly
Solution Approach 1:
The patent repositions the wobble bearing from a location that would conflict with the driven shaft and spur gear to a different spatial arrangement where it can operate without requiring excessive clearance. This dimensional repositioning allows the wobble bearing to function independently without compromising the compactness of the overall gear arrangement, thereby resolving the contradiction between reliability (collision prevention) and installation space requirements.
2Stability of the object's composition
If additional bolts or rods are provided inside the housing for rotationally fixed bearing of the actuator, then the stability of the actuator mounting is improved, but the device complexity and assembly difficulty increase
Solution Approach 1:
The actuator is integrated directly with the gear arrangement such that its mounting structure is combined with existing components of the gear system. This merging eliminates the need for separate bolts or rods, reducing device complexity and assembly difficulty while maintaining the required stability of the actuator mounting through the unified structural design.
3Adaptability or versatility
If the motor shaft is not parallel to the gearbox shaft to achieve L-shaped housing configuration, then the adaptability to different housing shapes is improved, but the gear arrangement complexity increases
Solution Approach 1:
The gear arrangement is divided into modular segments that can be independently positioned and configured. This segmentation allows the motor shaft and gearbox shaft to be arranged in non-parallel configurations for L-shaped housings without requiring a completely complex integrated design. Each module can be optimized independently, reducing overall complexity while maintaining adaptability to different housing shapes.
Data Source
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AI summary
The invention relates to an actuator (50) for a gear assembly (10) of a driven machine tool, which can be connected to an actuating element (60) of the gear assembly (10) and, in the connected state, is able to convert a switching movement of the actuating element (60) into a displacement of one or more gear elements (24, 42, 44) of the gear assembly (10), wherein the actuator (50) has two receiving sections (52, 56) for mounting the actuator (50) within the gear assembly (10). According to the invention, the first receiving section (52) has a substantially circular recess for receiving a shaft section of a first gear shaft (30) of the gear assembly (10), and the second receiving section (56) has a substantially circular recess for receiving a shaft section of a second gear shaft (20) of the gear assembly (10), wherein at least one of the receiving sections (52, 56) is laterally open.