Rotary Table Worm Drive Backlash Adjustment Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rotary tables face challenges in easily adjusting the backlash between the gears on the worm wheel and the worm screw, which affects smooth operation.
Innovation Solution
A rotary table design featuring a base body with a planar holding surface, a worm wheel with a first gear on its outer circumference, an inner ring, rolling elements, and a worm screw unit with a second gear that includes a cylindrical pin and recess configuration allowing for easy adjustment of backlash by moving the worm screw housing radially and rotating it as a pivot point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the backlash between the first gear and the second gear is adjusted by conventional methods, then the gear alignment can be optimized, but the adjustment process becomes complex and difficult to perform
Solution Approach 1:
The worm screw housing is made adjustable relative to the base body through the pin-recess mechanism, allowing dynamic repositioning of the worm screw along the radial direction. This enables operators to adjust the backlash by moving the housing to different positions and securing it with the pin in the elongated recess, transforming a static structure into a dynamically adjustable one that simplifies the adjustment process while maintaining precision
Solution Approach 2:
The pin acts as an intermediary element between the worm screw housing and the base body. By inserting the pin into the elongated recess, it mediates the positioning and securing of the housing, allowing for simple yet precise adjustment of the worm screw position relative to the gears without requiring complex fastening mechanisms
2Manufacturing precision
If the worm screw housing is made adjustable to change backlash, then the backlash can be optimized, but the structural complexity of the device increases
Solution Approach 1:
The adjustment mechanism is segmented into simple, discrete components: a pin and an elongated recess. The pin can be positioned at different locations along the recess to achieve different adjustment levels, dividing the continuous adjustment range into manageable discrete positions that reduce overall structural complexity while maintaining adjustment precision
Solution Approach 2:
The elongated recess is strategically designed with specific local properties - its length and orientation along the radial direction provide the necessary adjustment range, while its width corresponding to the pin diameter provides secure positioning. This localized design concentrates the adjustment functionality in a specific area without complicating the entire housing structure
Data Source
AI summary
A rotary table (1) includes a base body (10), a worm wheel (21), an inner ring (22), a plurality of rolling elements, and a worm screw unit (30). The worm screw unit (30) includes a worm screw (31) held to be rotatable around an axis and having a second gear (31A) meshing with the first gear (215), and a worm screw housing (32) surrounding and holding the worm screw (31) and being fixed to contact the holding surface at a planar contacting surface thereof. One of the holding and contacting surfaces has a cylindrical pin (33) arranged to protrude therefrom. The other of the holding and contacting surfaces has a first recess (11) formed to receive the pin (33), the first recess having a width corresponding to the pin (33) and being elongated in the radial direction of the worm wheel (21).