Synchronous Belt Reciprocating Mechanism With Variable Stroke Control
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Solution Overview
Problem
Existing reciprocating mechanisms have an invariable stroke, limited range of motion, significant resistance due to eccentric wheel and motor misalignment, and generate loud noise, failing to meet modern requirements for versatility and smooth operation.
Innovation Solution
A reciprocating mechanism with a variable stroke, using a mounting bracket, motor, grating, slot-type opposing photoelectric switch, control board, Hall switches, and magnet to enable smooth, low-noise operation through concentric synchronous belt drive and software-controlled motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an eccentric wheel structure is used to achieve reciprocating motion, then the mechanism can produce reciprocating motion, but the stroke is fixed and cannot be adjusted
Solution Approach 1:
The patent replaces the fixed eccentric wheel structure with a dynamic control system using a motor, grating, photoelectric switch, and control board. The motor rotates back and forth to drive the synchronous belt, which moves the load reciprocally. The stroke is dynamically adjusted by controlling the number of rotations through software, allowing variable stroke without changing the mechanical structure.
Solution Approach 2:
The patent substitutes the traditional mechanical eccentric wheel linkage system with an electromechanical system. Instead of using mechanical eccentricity to create reciprocating motion, the invention uses a motor driven by electrical signals, with position feedback from photoelectric switches and Hall sensors, to achieve controlled reciprocating motion through the synchronous belt mechanism.
2Object-generated harmful factors
If the eccentric wheel and motor are not concentric to achieve reciprocating motion, then motion is produced, but resistance increases and noise becomes loud
Solution Approach 1:
The patent extracts and eliminates the eccentric wheel component entirely from the system. By removing the eccentric wheel, the source of misalignment, resistance, and noise is eliminated. The reciprocating motion is achieved instead through the motor's back-and-forth rotation driving the synchronous belt, which provides smooth motion without the harmful effects of eccentricity.
3Adaptability or versatility
If a short stroke is used in the eccentric wheel mechanism, then the mechanism is compact, but the application range is limited
Solution Approach 1:
The patent implements dynamic stroke adjustment by controlling the motor's rotation range through software. The control board receives signals from photoelectric switches and Hall sensors to determine position, then controls the motor to rotate a variable number of times in each direction. This allows the stroke length to be dynamically changed to suit different application requirements, from short to long strokes, greatly expanding the application range.
4Length of moving object
If the eccentric wheel structure is used, then reciprocating motion is achieved, but the stroke cannot be extended beyond the eccentric wheel size limitations
Solution Approach 1:
The patent creates a universal reciprocating mechanism that can achieve various stroke lengths using the same basic structure. The motor, synchronous belt, and control system can be configured for short or long strokes by simply adjusting the control parameters and rotation counts, without needing different mechanical components. This multi-functional design eliminates the limitation where stroke length is constrained by eccentric wheel dimensions.
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
Achieves variable and long stroke motion with reduced friction and noise, enabling wide application in intelligent robots, massagers, and electronic beauty products.
Implementation Method 1
A lower end of the control board is provided with the slot-type opposing photoelectric switch that mates with the grating mounted on a free end of the output shaft of the motor
Implementation Method 2
A plurality of the Hall switches are uniformly distributed along a length direction on a side face of the control board adjacent to the mounting bracket... A side of the load adjacent to the control board is provided with the magnet that mates with the Hall switch
Data Source
AI summary
A reciprocating mechanism for driving a synchronous belt through forward and reverse rotation of a motor comprises: a mounting bracket, a motor, a grating, a slot-type opposing photoelectric switch, a control board, a Hall switch, a load, and a magnet. The mounting bracket is equipped with a driving wheel and a driven wheel, which driving wheel is connected to the driven wheel through the synchronous belt. A side of the mounting bracket is provided with the motor. An output shaft of the motor is connected to the driving wheel and extends to the other side of the mounting bracket. The other side of the mounting bracket is provided with the control board which is functionally connected to the motor. A lower end of the control board is provided with the slot-type opposing photoelectric switch which mates with the grating mounted on a free end of the output shaft of the motor. A plurality of the Hall switches are uniformly distributed along a length direction on a side face of the control board adjacent to the mounting bracket. The synchronous belt is provided with a load. A side of the load adjacent to the control board is provided with the magnet mating with the Hall switch. The present invention is characterized by a variable stroke, a long stroke, a low noise and smooth motion.