Ball Screw Dustproof Housing with Replaceable Wiper Member
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Solution Overview
Problem
Conventional ball screw apparatuses face issues with dust and dirt entering the space between the ball nut and screw shaft, leading to increased friction and seal ring wear, as well as difficulties in replacing worn-out seal rings.
Innovation Solution
A dustproof device comprising a housing attached to the ball nut with a wiper member that engages with the screw shaft's helical groove to prevent dust and dirt entry, featuring radially extended slots, a channel for handgrip, and a latch for easy attachment and detachment, ensuring effective cleaning and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If seal rings are used to seal the side or end portions of the ball nut, then dust and dirt are prevented from entering the space between the ball nut and screw shaft, but friction between the ball nut and screw shaft increases and seal rings are easily worn out
Solution Approach 1:
The invention extracts the sealing function from the ball nut itself by providing a separate housing with a wiper member that engages with the screw shaft. This separates the sealing mechanism from the main ball nut structure, allowing the wiper member to be easily removed and replaced without affecting the ball nut or screw shaft assembly.
Solution Approach 2:
The dustproof device is segmented into distinct components: a housing attached to the ball nut and a wiper member that can be independently attached to the housing. This segmentation allows the wiper member to be easily replaced when worn, without replacing the entire sealing system or disassembling the ball screw apparatus.
2Object-affected harmful factors
If seal rings are engaged into the ball nut and screw shaft, then dust and dirt are blocked, but the seal rings are not easily and quickly replaced when worn out or damaged
Solution Approach 1:
The sealing system is divided into separable components where the wiper member can be independently removed from the housing. The housing remains attached to the ball nut while the wiper member can be quickly detached and replaced, significantly improving maintenance ease compared to traditional seal rings that require disassembly of the ball nut or screw shaft.
Solution Approach 2:
The wiper member is designed with dynamic attachment and detachment capabilities through the latch mechanism. This allows the wiper member to be easily attached and removed as needed, providing flexibility for maintenance and replacement without permanent installation, thus improving ease of repair.
3Object-affected harmful factors
If a dustproof device with wiper member is attached to the ball nut, then dust and dirt are prevented from entering the ball screw apparatus, but the device complexity increases
Solution Approach 1:
The housing serves multiple functions: it attaches to the ball nut, provides structural support, and houses the wiper member. The wiper member itself performs both sealing and cleaning functions by engaging with the screw shaft grooves. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
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 dust and dirt from entering the ball screw apparatus, reducing friction and extending the lifespan of the ball bearing members by easily attaching and replacing wiper members, thus maintaining the cleanliness and functionality of the system.
Implementation Method 1
the wiper member including a wiper element provided thereon and engaged into the bore of the housing for engaging into the groove of the elongated screw shaft and for wiping off a dirt from the helical groove of the screw shaft
Data Source
AI summary
A ball screw device includes an elongated screw shaft and a ball nut having helical grooves for receiving ball bearing members, a housing is attached to the ball nut and includes a bore for receiving the screw shaft, and includes one or more slots communicative with the bore of the housing, and one or more wiper members are changeably engaged into the slots of the housing and include a wiper element engaged into the bore of the housing for engaging into the groove of the screw shaft and for removing or wiping off the dirt from the helical groove of the screw shaft and for preventing the ball nut and the screw shaft from being damaged by the dirt.