Pulley-Belt Positioning Layout for a Compact Movable Base Plate
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Solution Overview
Problem
Conventional position changing devices require a significant planar space for expansion and contraction, leading to increased device size due to the use of three cylinder mechanisms, which limits their compactness and versatility.
Innovation Solution
The implementation of a position changing device with four pulley mechanisms arranged in a quadrangular shape, utilizing a toothed belt and rotating members to move a movable base plate within a predetermined range, reducing the required planar space and enabling more compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If three cylinder mechanisms are used to change the planar position of the base plate, then the position changing function is achieved, but the device size in plane increases significantly
Solution Approach 1:
The patent replaces the conventional cylinder mechanisms with a belt-pulley mechanism. The moving member is connected to four pulleys via belts, and rotating the pulleys causes the moving member to move in the planar direction. This substitution of mechanical systems achieves the same position changing function while significantly reducing the required planar space.
Solution Approach 2:
The invention transitions from linear expansion/contraction in multiple directions (requiring large planar space) to rotational motion of pulleys (compact arrangement). The belts wrap around the pulleys, allowing the mechanism to achieve planar movement through circular/rotational geometry rather than linear extension, thereby reducing the device footprint.
2Area of stationary object
If four pulley mechanisms are used to reduce device size, then the planar space is reduced, but the complexity of the mechanism increases
Solution Approach 1:
The four pulley mechanisms use identical structures (each comprising a pulley, belt, and rotating member), allowing for standardized manufacturing and assembly. The repetitive modular design simplifies the overall complexity by using uniform components rather than varied mechanisms, making the system easier to manufacture and maintain despite having multiple elements.
3Manufacturing precision
If the moving member is constrained to move within a predetermined range, then the position control precision is improved, but the movement flexibility is reduced
Solution Approach 1:
The moving member is designed to move freely within a predetermined range under the control of the belt-pulley mechanisms, and can be stopped at any position within that range. The dynamic control allows the member to achieve precise positioning while maintaining the flexibility to access any position within the designed workspace, balancing precision and adaptability.
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 configuration allows for reliable movement of the base plate with reduced looseness and slippage, enabling a smaller device footprint while maintaining effective position changing capabilities, and allows for easy repositioning and fixing of the exciter relative to vehicle wheels.
Implementation Method 1
The toothed belt 45 is wound around the driving pulley 41, and the movable base plate 31 is moved by the rotation of the driving pulley 41
Data Source
AI summary
The disclosure provides a position changing device capable of reducing the size of the entire device in a plane. A position changing device (30) includes four pulley mechanisms (40). In the pulley mechanism (40), a toothed belt (45) is wound around a driving pulley (41) and a driven pulley (43), and is held between the driving pulley (41) and an idler roller (42) by the idler roller (42) and held between the driven pulley (43) and an idler roller (44) by the idler roller (44), and when the driving pulley (41) is driven by a driving mechanism (46), the position of a movable base plate (31) is changed.