Rack Extension Jig Coplanar Tooth Projections
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rack extension jig devices are cumbersome to operate, requiring rotational force to engage pins with rack teeth, making it difficult to quickly and easily add racks in a straight alignment with a single operation.
Innovation Solution
A rack extension jig device with a hand grip body featuring front, intermediate, and rear tooth projections that engage with rack teeth in a coplanar relationship, allowing for easy alignment by pushing the projections perpendicular to the roots of the teeth, and an adjustment side plate that secures the racks at a predetermined pitch interval, eliminating the need for manual adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pins are supported in a cantilever fashion requiring rotational force to engage with rack teeth, then the structure is simple, but the operation becomes cumbersome and difficult to perform with a single operation
Solution Approach 1:
Instead of supporting pins in a cantilever fashion that requires rotational force, the invention inverts the approach by providing a support portion that directly supports the pins from below, allowing linear pushing motion to engage the rack teeth. This inversion of the support structure eliminates the need for rotational force and enables single-operation engagement.
Solution Approach 2:
The invention introduces a support portion as an intermediary element between the hand grip body and the pins. This support portion provides direct structural support to the pins, eliminating the need for cantilever support and rotational motion. The intermediary support structure mediates the force transmission from the user's pushing motion to the pin engagement with rack teeth.
2Productivity
If multiple adjustment operations are required to align racks straight, then precision can be achieved, but the time required for rack addition increases
Solution Approach 1:
The invention incorporates a support portion that is pre-configured with the correct height and positioning to automatically ensure proper alignment between adjacent racks. This preliminary action of pre-setting the support structure eliminates the need for multiple subsequent adjustment operations, achieving both high productivity and manufacturing precision in a single operation.
Solution Approach 2:
The support portion is designed to automatically perform the alignment function without requiring additional manual adjustment operations. The structure itself provides the necessary support and positioning, making the system self-sufficient for achieving proper rack alignment. This self-service capability eliminates time-consuming manual adjustments while maintaining precision.
Data Source
AI summary
In a rack extension jig device 9, a protracted direction E of tooth projections 12-14 and an elevational direction H of racks 7, 8 are placed in a coplanar position G. This makes it possible to positively engage the tooth projections 12-14 with the respective rack teeth 7, 8 and half tooth surfaces 7c, 8c so as to set a predetermined pitch interval T at a contact portion between the neighboring racks 7, 8 by only pushing the tooth projections 12, 13, 14 against roots 7d, 8d of the respective rack teeth 7, 8 in perpendicular to the roots 7d, 8d, thereby making a rack-adding work easy, quick and user-friendly.