Hanging Slider Roller Bearing Structure for Reduced Wear
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Solution Overview
Problem
Existing window blind sliders with metal ball bearings experience rapid wear due to concentrated stress at contact points, leading to a short useful lifetime.
Innovation Solution
A hanging slider design utilizing roller bearings instead of metal ball bearings, with roller bearings arranged parallel to the axle shaft and supported between the hollow member and axle shaft, providing increased contact area and reducing wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal ball bearings are used in the hanging slider, then the structure is simple and easy to manufacture, but the contact area is small causing concentrated stress and rapid wear
Solution Approach 1:
The invention changes the geometric parameters of the bearing from spherical balls to cylindrical rollers. This parameter change transforms the contact geometry from point contact to line contact, significantly increasing the contact area between the bearing and the axle shaft, thereby distributing the stress more evenly and reducing wear on the hollow member and axle shaft.
Solution Approach 2:
The invention transitions from spherical ball bearings to cylindrical roller bearings. This change in curvature geometry from spherical to cylindrical shape allows for increased contact area while maintaining the rolling motion function. The cylindrical shape of the rollers provides line contact with the axle shaft, reducing stress concentration compared to the point contact of spherical balls.
2Reliability
If metal ball bearings are used, then the manufacturing process is simple, but the contact area is small leading to stress concentration and rapid wear
Solution Approach 1:
The invention changes the geometric parameters of the bearing from spherical balls to cylindrical rollers. This parameter change transforms the contact geometry from point contact to line contact, significantly increasing the contact area between the bearing and the axle shaft, thereby distributing the stress more evenly and reducing wear on the hollow member and axle shaft.
3Reliability
If roller bearings are used instead of metal ball bearings, then the contact area is increased and wear is reduced, but the device complexity increases
Solution Approach 1:
The invention changes the geometric parameters of the bearing from spherical balls to cylindrical rollers. This parameter change transforms the contact geometry from point contact to line contact, significantly increasing the contact area between the bearing and the axle shaft, thereby distributing the stress more evenly and reducing wear on the hollow member and axle shaft.
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 use of roller bearings in the hanging slider design increases the contact area and reduces wear, thereby prolonging the useful lifetime of the slider by distributing stress more evenly.
Implementation Method 1
The plurality of roller bearings are received inside the hollow member; each one of the roller bearings is arranged parallel to the axle shafts respectively; each one of the roller bearings is supported between the hollow member and the axle shaft
Data Source
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AI summary
A hanging slider includes a main body (100), an axle shaft (210), two wheel members (220/230) and a plurality of roller bearings (300). The main body (100) includes a hollow member (110) and a hooking member (130). The axle shaft (210) penetrates through the hollow member (110). The two wheel members (220/230) are arranged on two ends of the axle shaft (210) and are positioned outside of the hollow member (110) respectively. The roller bearings (300) are received inside the hollow member (110); each roller bearing (300) is parallel to the axle shaft (210) and supports between the hollow member (110) and the axle shaft (210); the roller bearings (300) are arranged to circumference the axle shaft (210). With the linear contacts formed among the roller bearings (300) and the hollow member (110) as well as the axle shaft (210), the useful lifetime of the hanging slider is prolonged.