Helical Gear Assembly Device Preventing Canting Damage
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Solution Overview
Problem
Current methods for assembling helically geared components, such as worm gears and worms, often result in canting, which can damage the components, especially when using sintered materials, due to the development of sharp edges during the sintering process, and do not effectively align the teeth for engagement.
Innovation Solution
A method and assembly device that position the first sprocket coaxially at a 90° angle to the axis, allowing axial and rotary movements to align the teeth, with a compensation unit to adjust the position and prevent canting, ensuring complete engagement by executing axial and rotary motions based on the helical gearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the worm gear is rotated into the correct position using adjusting lateral cylinders of the pneumatic axis, then the teeth can engage with the worm, but canting of the worm gear may occur which can damage the components
Solution Approach 1:
A specifically designed assembly device acts as an intermediary between the worm gear and worm. This device includes a mounting plate with a recess that receives the worm gear, and a pressing element that applies controlled force to press the worm gear against the worm, ensuring proper engagement without canting. The assembly device mediates the assembly process to achieve precise tooth alignment while preventing damage to the sintered worm gear components.
2Ease of manufacture
If a sintered worm gear is used instead of steel, then manufacturing flexibility is improved, but sharp edges develop at bonding sections increasing the risk of damage
Solution Approach 1:
The assembly device incorporates a pressing element that applies controlled, gradual force to press the sintered worm gear against the worm during assembly. This beforehand cushioning approach prevents sudden impacts or misalignments that could damage the vulnerable sharp edges of the sintered bonding sections. The controlled pressing action accommodates the material properties of sintered gears while ensuring proper engagement.
3Ease of operation
If the worm gear is positioned coaxially and approached axially until contacting the worm, then assembly is simplified, but the teeth may not be in the correct position for engagement
Solution Approach 1:
The assembly device employs a dynamic adjustment mechanism where the mounting plate can rotate the worm gear around its axis after axial positioning. This dynamic capability allows the operator to first simplify the assembly by axial approach, then adjust the rotational position to achieve correct tooth alignment, and finally secure the position. The device transitions from static coaxial positioning to dynamic rotational adjustment to resolve the contradiction between simplicity and precision.
Data Source
AI summary
A method for assembling a helically geared first sprocket, particularly a worm gear and a second sprocket arranged on an axis, particularly a worm, to form a transmission, particularly a worm drive, in which the first sprocket is positioned coaxially in reference to an axis of assembly of the first sprocket, aligned at a 90° position in reference to the axis via an assembly device.