Ball Screw Cooling Structure Preventing Leakage
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Solution Overview
Problem
Conventional ball screw devices fail to effectively prevent overheating of the ball nut due to leakage of the cooling agent between the outer cover and the ball nut, which is not securely attached, leading to inefficient heat dissipation during high-speed rotation.
Innovation Solution
A ball screw device with a ball nut featuring a zigzag shaped fluid flowing passage, including channels and compartments, deflecting members, and ring members to securely retain the cooling agent and prevent leakage, ensuring effective heat dissipation through a stable and solid attachment mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a peripheral cavity is formed between the outer cover and the ball nut for cooling agent flow, then the ball nut can be cooled, but the cooling agent leaks due to insufficient sealing
Solution Approach 1:
The cooling structure is divided into multiple segments: the ball nut body, the outer cover, and intermediate sealing components (gaskets or O-rings). This segmentation allows each component to perform its specific function - the ball nut contains the cooling channels, the outer cover provides structural support, and the intermediate components provide sealing to prevent leakage.
Solution Approach 2:
Sealing elements such as gaskets or O-rings are introduced as intermediary components between the ball nut and the outer cover. These intermediaries create a reliable seal that prevents cooling agent leakage while allowing the cooling structure to function effectively.
2Ease of manufacture
If the outer cover is not solidly attached to the ball nut, then assembly is easy, but the cooling agent leaks out
Solution Approach 1:
The attachment structure is segmented into multiple functional layers: fastening components (screws or clips) provide secure attachment, while intermediate sealing components (gaskets or O-rings) provide the sealing function. This segmentation allows each component to optimize its specific function without compromising the other.
Solution Approach 2:
Sealing elements serve as intermediary components between the ball nut and outer cover, creating a reliable seal that prevents cooling agent leakage while maintaining ease of assembly and disassembly.
3Temperature
If the cooling agent flows directly through the ball nut, then cooling efficiency is high, but the cooling agent leaks due to lack of proper sealing structure
Solution Approach 1:
The cooling system is segmented into the ball nut containing cooling channels, the outer cover providing structural support, and intermediate sealing components preventing leakage. This segmentation allows direct cooling of the ball nut while preventing cooling agent escape.
Solution Approach 2:
Sealing elements are positioned as intermediaries between the cooling channels in the ball nut and the external environment, allowing efficient heat dissipation through direct cooling while preventing cooling agent leakage.
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
The solution effectively prevents overheating of the ball nut by maintaining a secure flow of cooling agent, ensuring efficient heat dissipation and preventing leakage, even at high rotational speeds.
Implementation Method 1
a cooling structure is formed in the ball nut or the elongated screw shaft for suitably cooling the ball nut or the elongated screw shaft
Implementation Method 2
a peripheral cavity formed between an outer cover and the ball nut as a pathway for cooling agent so as to deprive the ball nut of generated heat therein
Data Source
AI summary
A ball screw device includes a ball nut having a bore for receiving a screw shaft, and having a number of longitudinal channels and compartments for forming a zigzag shaped fluid flowing passage in the ball nut, a number of deflecting members engaged with the compartments of the ball nut and each having a recess for communicating adjacent channels with each other, the outer peripheral surfaces of the deflecting members are tilted relative to the ball nut for allowing the deflecting members to be expanded when the deflecting members are expanded, a cooling agent flows through the zigzag shaped fluid flowing passage for cooling the ball nut and for preventing the ball nut from being overheated.