Planetary Rolling Micro-Jack for Heavy-Load Precision Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current jacking devices with ordinary threads face issues with friction and stick-slip phenomena during minute adjustments, especially when handling heavy loads, leading to unsatisfactory precision and load-carrying capacity.
Innovation Solution
A planetary rolling micro-jacking device with tapered thread rollers and a roller cage system that reduces friction through rolling contact, enhancing precision and load-carrying capacity by using thrust roller bearings and wave-shaped contact areas between rolling elements and rotor-disk/stator-disk annular tooth grooves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If ordinary thread jacking devices are used, then the structure is simple, but friction between threads causes difficulty in adjusting with heavy loads and stick-slip phenomenon occurs during minute adjustments
Solution Approach 1:
The patent replaces the traditional sliding thread mechanism with a planetary rolling mechanism. The planetary thread rollers roll between the rotating plate and top plate instead of sliding, substituting rolling friction for sliding friction. This mechanical substitution eliminates the stick-slip phenomenon and enables smooth adjustment even under heavy loads, while the tapered thread design on the planetary rollers maintains precise positioning capability
Solution Approach 2:
The patent changes the friction parameter by introducing rolling contact instead of sliding contact. The planetary thread rollers with tapered threads create rolling friction which is significantly lower than sliding friction. This parameter change from sliding to rolling contact resolves the contradiction between adjustment smoothness and positioning precision
2Force
If ordinary thread jacking devices are used, then the device complexity is low, but the load-carrying capacity is insufficient for heavy-load adjustments
Solution Approach 1:
The patent segments the load-carrying function across multiple planetary thread rollers arranged in a planetary configuration. Each roller carries a portion of the total load, and the tapered thread design on each roller contributes to the overall load-carrying capacity. This segmentation allows the device to handle heavy loads while keeping individual component sizes manageable
Solution Approach 2:
The patent employs curved tapered threads on the planetary rollers instead of straight threads. The tapered thread geometry creates a wedge effect that converts rotational motion into axial force more efficiently, increasing load-carrying capacity. The curved contact path between the rollers and plates also distributes stress more evenly
3Reliability
If planetary rolling mechanism with multiple components is used, then friction is reduced and load-carrying capacity increases, but the device complexity increases
Solution Approach 1:
The patent merges multiple functions into the planetary thread roller components. Each roller simultaneously provides: (1) rolling contact for reduced friction, (2) tapered thread for force multiplication, (3) self-locking capability through the tapered geometry, and (4) integrated positioning function. This merging of functions reduces the number of separate components needed while maintaining high adjustment precision and load-carrying capacity
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 device achieves improved heavy-load and precision adjustments with reduced friction, self-locking functionality, and increased load-carrying capacity, making it suitable for applications requiring fine adjustments in small spaces.
Implementation Method 1
The planetary thread rollers roll between the rotating and the top plates, and rotate about the central axis
Implementation Method 2
The planetary thread rollers have tapered thread. There are multiple annular tooth grooves on both the top side of the rotating plate and the bottom side of the top plate. The annular tooth grooves of the rotating and the top plates engage with the thread of the planetary thread rollers
Implementation Method 3
enhancing precision and load-carrying capacity by using thrust roller bearings
Implementation Method 4
The use of multiple planetary thread rollers increases the load-carrying capacity. The device has a self-lock function, and is compact in structure
Data Source
AI summary
The present disclosure relates to a planetary rolling micro-jacking device comprising a bottom plate, a rotating plate and a top plate mounted on a central shaft. There are at least three planetary thread rollers provided between the rotating and the top plates. The rotating and the top plates are provided with multiple annular tooth grooves. The annular tooth grooves of the rotating plate and the annular tooth grooves of the top plate engage with the thread of the planetary thread rollers. The planetary thread rollers roll between the rotating and the top plates, and rotate around the central shaft.