Sector Gear Rack Reversing Mechanism for Stable Motion Conversion
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Solution Overview
Problem
Existing reciprocating linear/rotational motion conversion devices, such as crank link and sector-gear mechanisms, suffer from low transmission efficiency, high energy consumption, and unstable operation, leading to mechanical friction and noise issues.
Innovation Solution
A reciprocating linear/rotational motion conversion device comprising a main shaft, a linear motion guiding mechanism, a sector gear, and a rack frame with a gear rack pair, along with a reversing mechanism that ensures smooth engagement and disengagement of the sector gear with the gear rack pair, utilizing a guide member and roller wheel to reduce friction and maintain continuous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a crank link mechanism is used for motion conversion, then the structure is simple and widely applicable, but the transmission efficiency is low and fuel utilization is poor
Solution Approach 1:
The motion conversion mechanism is segmented into distinct functional components: a rack frame with linearly reciprocating motion, a sector gear for rotational motion, and a reversing mechanism with guide members. This segmentation allows each component to perform its specific function optimally, improving overall transmission efficiency while maintaining structural simplicity.
Solution Approach 2:
The patent introduces a reversing mechanism with guide members as an intermediary between the rack frame and sector gear. This intermediary component ensures smooth engagement and disengagement during transitions, reducing mechanical friction and energy loss, thereby improving transmission efficiency without complicating the overall structure.
2Productivity
If a shaft type connecting rod transmission system is used, then linear reciprocating motion can be converted to rotational motion, but the slide block reciprocation increases load and mechanical friction causing noise and instability
Solution Approach 1:
The patent extracts the harmful reciprocating motion of the slide block from the system by replacing it with a rack frame that moves linearly without reciprocation. The sector gear rotates continuously in one direction, eliminating the back-and-forth motion that causes mechanical friction and noise, while still achieving the required motion conversion.
Solution Approach 2:
Instead of using a connecting rod to transfer motion from piston to crank, the patent inverts the approach by using a rack frame with unidirectional linear motion that directly drives a sector gear. This inversion eliminates the need for reciprocating components, reducing mechanical friction and noise while maintaining motion conversion functionality.
3Adaptability or versatility
If a sector-gear mechanism is used with disengagement from gear rack pair, then one-way conversion is achieved, but the gear rack pair becomes unconstrained causing inaccurate reengagement and unstable transmission
Solution Approach 1:
The reversing mechanism with guide members performs preliminary action by preparing the rack frame for smooth engagement with the sector gear before the actual transmission phase. The guide members ensure the rack frame is properly positioned and constrained during transitions, enabling accurate reengagement and stable transmission.
Solution Approach 2:
The guide members act as intermediaries between the rack frame and sector gear during engagement and disengagement. They ensure smooth transitions by maintaining proper alignment and constraint, preventing inaccurate reengagement and ensuring reliable, stable transmission while allowing one-way conversion capability.
4Ease of operation
If traditional motion conversion mechanisms are used, then basic function is achieved, but energy consumption is high and continuous smooth operation is not supported
Solution Approach 1:
The patent achieves continuous smooth operation by eliminating reciprocating motion and using a rack frame with unidirectional linear motion that continuously drives the sector gear. The reversing mechanism with guide members ensures smooth transitions without interruption, maintaining continuous useful action and reducing energy consumption while achieving the basic motion conversion function.
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 solution enables accurate and continuous conversion of reciprocating linear motion to rotational motion with reduced mechanical consumption and noise, improving overall transmission efficiency and stability.
Implementation Method 1
A guide member and roller wheel are arranged to reduce friction and maintain continuous operation
Data Source
AI summary
A reciprocating linear/rotational motion conversion device has a main shaft, a linear motion guiding mechanism, a sector gear and a rack frame. The sector gear is fixedly connected with the main shaft. A rack pair is arranged on the inner wall of the rack frame. The rack pair comprises a first gear rack and a second gear rack separately arranged on both sides of the sector gear. The reciprocating linear/rotational motion conversion device further includes a reversing mechanism fixedly connected with the main shaft. A cylinder device contains the reciprocating linear/rotational motion conversion device, connecting rods, pistons and cylinder bodies. The cylinder body is sleeved on the piston, and a cylinder head is arranged on one end of the cylinder body.