Ball Screw Nut Circulation Component Caulking Without Pins
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Solution Overview
Problem
The existing fixing method for circulation components in ball screw devices using pins increases the number of components and limits layout flexibility due to the requirement for through holes, necessitating a solution that fixes the components without pins.
Innovation Solution
A nut design with a housing part and a circulation component that includes a rib and caulking part, where the rib is caulked onto the nut's side surfaces, providing secure attachment without the need for pins, ensuring the circulation component remains attached and stable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pin is used to fix the circulation component to the nut main body, then the circulation component is securely attached, but the number of components increases
Solution Approach 1:
The circulation component is integrated with the nut main body through direct attachment features (protrusions fitting into recesses) rather than using separate fastening elements like pins. This merging of components eliminates the need for additional fasteners while maintaining secure attachment, directly resolving the contradiction between attachment security and component count
Solution Approach 2:
The pin component is completely removed from the assembly by replacing it with integrated attachment features formed directly on the circulation component and nut main body. This extraction of the unnecessary fastening element reduces component count while the integrated features provide equivalent or superior attachment functionality
2Reliability
If through holes are provided in the nut main body and circulation component for pin insertion, then the circulation component can be fixed, but the layout is limited
Solution Approach 1:
The attachment functionality is segmented into multiple distributed protrusions and recesses rather than requiring single through-holes. This segmentation allows the attachment features to be positioned optimally for structural integrity without constraining the overall layout, as each segmented feature independently contributes to fixation while allowing flexible arrangement
Solution Approach 2:
The attachment mechanism transitions from a through-hole approach (requiring penetration in one dimension) to a surface-based protrusion-recess system (utilizing surface geometry). This dimensional change eliminates the need for through-holes, providing layout flexibility while maintaining secure fixation through geometric interlocking
3Device complexity
If the circulation component is attached without pins or through holes, then the number of components is reduced, but the attachment reliability may decrease
Solution Approach 1:
The attachment system utilizes composite structural features combining protrusions and recesses that work together as an integrated system. This composite approach creates multiple interlocking points that collectively provide high attachment reliability without requiring separate pin components, resolving the contradiction between simplicity and reliability
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 configuration reduces the number of components required, enhances stability, and prevents the circulation component from detaching, allowing for smoother ball handling and operation within the ball screw device.
Implementation Method 1
a caulking part obtained by caulking at least part of the rib toward the side surface
Data Source
AI summary
The nut according to the present disclosure includes a nut main body and a circulation component. The nut main body includes a housing part having a bow shape when viewed from an axial direction, a seat surface forming a bottom surface of the housing part, a through hole passing through the seat surface, and a pair of side surfaces arranged on both sides in the axial direction with respect to the housing part.