Double-Nut Ball Screw Assembly with Integrated Spacer
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Solution Overview
Problem
Conventional double-nut cooling ball screws are inconvenient to assemble, with sealing members easily separating during assembly and being prone to damage, requiring additional tools and resulting in a cumbersome process.
Innovation Solution
The double-nut cooling ball screw design includes guiding assemblies with tubular members and fastening members that securely engage with coupling holes in the nuts, allowing for easy assembly without additional tools and preventing damage to sealing members, featuring a spacer that can be easily positioned between the nuts and a coolant circulation system that ensures smooth coolant flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sealing members are placed at ends of cooling channels and nuts are threadedly engaged, then cooling function is achieved, but sealing members are easily separated during assembly and damaged by preload member
Solution Approach 1:
The patent applies preliminary action by pre-installing the sealing members into recesses of the spacer before assembling the nuts onto the threaded shaft. This ensures the sealing members are securely positioned in advance, preventing them from being separated or damaged during the subsequent assembly process. The recesses in the spacer act as pre-prepared seating positions that protect the sealing members throughout assembly.
2Reliability
If additional tools are used to press sealing members into counterbores, then sealing members are securely installed, but assembly process becomes cumbersome
Solution Approach 1:
The patent applies self-service by designing the spacer with built-in recesses that automatically secure the sealing members during assembly, eliminating the need for external pressing tools. The recesses are integral to the spacer structure, allowing the sealing members to be installed and retained through the normal assembly process without requiring additional tools or complex operations.
3Reliability
If sealing members are accommodated in receiving counterbores, then sealing is improved, but assembly requires additional pressing tool and becomes cumbersome
Solution Approach 1:
The patent applies preliminary action by pre-installing the sealing members into recesses of the spacer before assembling the nuts onto the threaded shaft. This ensures the sealing members are securely positioned in advance, preventing them from being separated or damaged during the subsequent assembly process. The recesses in the spacer act as pre-prepared seating positions that protect the sealing members throughout assembly.
Solution Approach 2:
The patent applies self-service by designing the spacer with built-in recesses that automatically secure the sealing members during assembly, eliminating the need for external pressing tools. The recesses are integral to the spacer structure, allowing the sealing members to be installed and retained through the normal assembly process without requiring additional tools or complex operations.
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
Facilitates easy assembly without tools, prevents sealing member damage, and enhances cooling efficiency by ensuring smooth coolant circulation, addressing the assembly challenges and sealing issues of conventional designs.
Implementation Method 1
The first nut threadedly engages with the threaded shaft through a plurality of balls, and includes a head end portion
Implementation Method 2
a coolant can circulate in the cooling channels to cool the ball screw
Implementation Method 3
The first cooling channel assembly is formed in the first surrounding wall, an inlet port which is formed through the head end portion and which is in fluid communication with the first cooling channel assembly
Data Source
AI summary
A double-nut cooling ball screw includes two nuts threadedly engaging with a threaded shaft and having connecting end portions facing toward each other and cooling channel assemblies in fluid communication through coupling holes in the connecting end portions, and a spacer interposed between the connecting end portions and having notched recesses for accommodating guiding assemblies. Each guiding assembly is rotatable relative to the nuts between a non-stored position for facilitating fastening thereof, and a stored position to be concealed between the nuts.