Spindle Drive with Clutch and Gear Segmentation
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Solution Overview
Problem
Conventional spindle drives cannot perform multi-machining operations due to limitations in controlling backlash and switching between high-speed and low-speed rotations, leading to inefficiencies in machining precision and heat generation issues.
Innovation Solution
A spindle drive system with a gear box, driven shafts, idle shaft, high-speed driving shaft, low-speed driving gear, decelerator, and clutch unit, which allows for precise control of backlash removal and speed changes through a servomotor and hydraulic pressure, enabling high-speed and low-speed operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If gears are used for spindle rotation, then the spindle can rotate at high and low speeds, but heat generation increases and machining smoothness deteriorates
Solution Approach 1:
The patent divides the transmission system into two separate paths: a direct-drive path for high-speed rotation (bypassing gears) and a gear transmission path for low-speed rotation. This segmentation allows the system to avoid gear heat generation during high-speed operations while maintaining the ability to use gears when low-speed precision machining is required.
Solution Approach 2:
The patent introduces a clutch mechanism as an intermediary component that selectively engages or disengages the gear transmission path. When the clutch is disengaged, the spindle motor directly drives the spindle for high-speed rotation without gear heat generation. When engaged, gear transmission is activated for low-speed operations, allowing smooth control of the transmission path.
2Manufacturing precision
If gears are used for precise low-speed rotation, then backlash can be removed, but heat generation increases and smooth machining becomes difficult
Solution Approach 1:
The patent segments the transmission system into direct-drive and gear-driven paths, allowing precise low-speed rotation to be achieved through the direct-drive path without gear heat generation. The gear path is reserved for operations where its transmission characteristics are beneficial, avoiding unnecessary heat accumulation during precision machining.
Solution Approach 2:
The clutch mechanism serves as an intermediary that controls whether power is transmitted through gears or directly to the spindle. For precise low-speed rotation, the clutch disengages the gear path, eliminating gear heat generation while maintaining rotation precision through direct motor control.
3Adaptability or versatility
If a single spindle design is used, then结构简单性 is maintained, but multi-machining operations cannot be performed
Solution Approach 1:
The patent implements a dynamic transmission system where the clutch can selectively engage or disengage the gear path based on machining requirements. This dynamic configuration allows a single spindle design to adapt between high-speed direct-drive mode and low-speed gear-driven mode, enabling multi-machining operations without requiring multiple specialized spindles.
Solution Approach 2:
The patent creates a universal spindle drive system that can perform both high-speed rotation and precise low-speed rotation with backlash removal through a single integrated design. The clutch mechanism enables one spindle to fulfill multiple functions that would traditionally require separate specialized spindles.
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
Enables precise high-speed rotation and low-speed control, allowing for various machining operations while minimizing backlash and heat generation, thereby improving machining precision and versatility.
Implementation Method 1
a low-speed driving gear that is disposed at the gear box, engaged with any one of the driven shafts, and pressed by a pressing unit such that backlash is removed
Implementation Method 2
a decelerator that is disposed at the low-speed driving gear and driven by a servomotor to drive the low-speed driving gear
Implementation Method 3
a clutch unit that is disposed between the servomotor and the low-speed driving gear and controls power transmission of the servomotor
Data Source
AI summary
The present invention relates to a spindle drive. A spindle drive according to an exemplary embodiment of the present invention includes: a body that is disposed at a side of a machine tool; a spindle that is disposed at the body, with a ring gear disposed thereunder; a gear box that is disposed at a side of the body; a plurality of driven shafts that is disposed at the gear box and engaged with the ring gear; an idle shaft that is disposed at the gear box and engaged with a plurality of driven gears at a side; a high-speed driving shaft that is disposed at the gear box and drives the idle shaft while changing the speed by a driving force of a spindle motor; a low-speed driving gear that is disposed at the gear box, engaged with the driven shafts, and pressed by a pressing unit such that backlash is removed; a decelerator that is disposed at the low-speed driving gear and driven by a servomotor to drive the low-speed driving gear; and a clutch unit that is disposed between the servomotor and the low-speed driving gear and controls power transmission of the servomotor.