Reciprocating Linear Pushrod With Crossed Threads
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing four-link-rod modules used in applications like mobile billboards and windshield wipers have a large volume and complex structure, making installation, maintenance, and repair cumbersome.
Innovation Solution
A reciprocating linear pushrod design featuring a base, transmission mechanism with a motor-driven rotary shaft having crossed left- and right-handed thread grooves, and a moving mechanism with a crescent member and moving rod, allowing for reciprocal movement with single-direction motor rotation, reducing volume and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a four-link-rod module is used to drive swing arms back and forth, then the positioning function is achieved, but the volume and structural complexity increase significantly
Solution Approach 1:
The patent combines the motor, transmission mechanism with threaded portion, moving mechanism with crescent member, and supporting components into an integrated reciprocating linear pushrod assembly. This merging eliminates the need for separate four-link-rod modules while achieving the same positioning function, thereby reducing overall device complexity and volume.
Solution Approach 2:
The reciprocating linear pushrod serves multiple functions: it provides reciprocating motion, positioning control, and structural support simultaneously. The single-direction rotating motor with crossed threaded portions creates bidirectional movement capability, making the device versatile for different positioning requirements without needing additional components.
2Adaptability or versatility
If a four-link-rod module is used for continuous swing arm movement, then the positioning capability is improved, but the installation and maintenance become cumbersome
Solution Approach 1:
By integrating all functional components into a compact reciprocating linear pushrod unit, the patent simplifies installation to a single module replacement rather than assembling multiple four-link-rod components. The unified structure reduces installation steps and improves operational convenience.
Solution Approach 2:
The patent segments the positioning system into modular reciprocating linear pushrod units that can be independently installed and replaced. This modular segmentation makes installation and maintenance easier compared to the interconnected four-link-rod module system.
3Object-generated harmful factors
If the motor rotates in single direction to drive reciprocal movement, then the component cost is reduced and noise is minimized, but the transmission mechanism must be more complex
Solution Approach 1:
The patent changes the transmission parameter by using crossed left-handed and right-handed thread grooves instead of traditional bidirectional motor rotation. This parameter change allows single-direction motor rotation to produce reciprocal linear movement, reducing noise from motor reversal while the threaded mechanism handles the complexity of bidirectional motion control.
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
This design enhances transmission performance, extends service life, stabilizes operation, protects electrical components, reduces noise, and lowers component costs by enabling single-direction motor operation and simplifying the structure.
Implementation Method 1
the threaded portion includes a left-handed thread groove and a right-handed thread groove crossed with each other, and both ends of the left-handed thread groove are communicated to both ends of the right-handed thread groove respectively
Data Source
AI summary
A reciprocating linear pushrod includes a base, a transmission mechanism and a moving mechanism. The transmission mechanism includes a motor and a rotary shaft, and the rotary shaft has a threaded portion including a left-handed thread groove and a right-handed thread groove crossed with each other, and both ends of the left-handed thread groove are communicated to both ends of the right-handed thread groove respectively. The moving mechanism includes a moving rod and a crescent member, and the moving rod has an axial hole and a radial hole and is sheathed on the rotary shaft by the axial hole, and the crescent member is accommodated in the radial hole and embedded into the threaded portion, so that the moving mechanism can be moved reciprocally according to the rotation of the rotary shaft, and this disclosure has the effects of reducing the total volume and simplifying the structure significantly.