Electric Control Box Linear Motion with Push Rod Gear
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Solution Overview
Problem
Existing linear electric control boxes face issues such as large volume, space wastage, low precision, unsteadiness, high friction, and short lifespan due to defects in prior designs, leading to vibration and reduced accuracy.
Innovation Solution
A compact electric control box design featuring a base seat with a concave recess, an upper cover, a push rod gear, a motor, sliding tracks with teeth strips, and a movable table driven by a worm rod, allowing for precise and steady linear movement with multiple positioning capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the driven nut is directly installed on an external thread on a rotating lead screw to achieve small volume, then the space occupation is reduced, but the friction force becomes too large causing unsteadiness and reduced precision
Solution Approach 1:
The patent introduces a push rod as an intermediary component between the lead screw and the moving table. The lead screw drives the push rod, which then pushes the moving table, eliminating direct contact between the driven nut and lead screw. This intermediary mechanism reduces friction and wear while maintaining compact dimensions.
2Ease of operation
If the driven nut is limited by switches to define position and direction of movement, then the control is simplified, but the friction force increases and precision decreases
Solution Approach 1:
The patent replaces the mechanical switch-based positioning system with a magnetic field-based detection system. Magnetic sensors detect the position of the moving table without physical contact, eliminating the friction and wear associated with mechanical switches while maintaining simple control functionality.
3Device complexity
If the channel gap between driven nut and switches is allowed to increase due to wear, then the structure remains simple, but vibration increases and lifetime decreases
Solution Approach 1:
The push rod serves as a mediator that transfers motion from the lead screw to the moving table without requiring tight tolerances or precise fitting. This intermediary approach allows for larger clearance gaps while maintaining smooth operation, reducing vibration, and extending the service life of the components.
4Force
If a longer moving path is created for pushing and pull, then large pushing or pulling force can be generated, but the volume of the control box increases
Solution Approach 1:
The patent utilizes the vertical dimension within the control box by installing the lead screw vertically and the moving table on vertical guide rails. This allows for a long moving path in the vertical direction without increasing the horizontal footprint, enabling large pushing/pulling forces while maintaining compact overall volume.
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 design achieves a small volume, efficient space use, high precision, and extended lifespan with reduced wear and tear, enabling large pushing or pulling forces and precise, steady movement.
Implementation Method 1
a motor (101) being installed within the upper cover (10); the motor (101) being installed with a motor gear (102) for engaging with the push rod gear (2) so that the motor (101) can driven the push rod gear (2)
Implementation Method 2
a worm rod (32) which is engaged with the two moving gears (31); the worm rod (32) being driven by the push rod (4) so that the worm rod (32) drives the moving table (3) to move
Implementation Method 3
two sliding tracks (13) being installed in two lateral walls of base seat (1); each of the sliding track (13) being installed with a teeth strip (12); two sides of the movable table (3) being installed with respective moving gears (31) for engaging with the teeth strips (12)
Data Source
AI summary
An electric control box for control of linear movement includes a base seat having a concave recess at an upper side thereof; a push rod gear being installed at a left wall of the recess of the base seat; the push rod gear being extended with a push rod teeth; a motor being installed within an upper cover; the motor can driven the push rod gear; a movable table driven by the push rod and capable of moving linearly; a push rod being installed at a front end of the moving table and extending out of the moving table; and two sliding tracks being installed with respective teeth strips; two sides of the movable table being installed with respective moving gears for engaging with the teeth strips so that the moving table is movable thereon; and thereby, the moving table is movable along the two sliding tracks.