Disc-Coupled Drive Structure for Motor Load Fluctuation Isolation
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Solution Overview
Problem
In existing actuators, load fluctuations due to external forces when the motor is stopped can cause motor breakage, as the fluctuation is transmitted through the elastic spring, leading to potential motor damage unless the actuator is enlarged.
Innovation Solution
Incorporating a first disc, a second disc portion, and an elastic body, where the elastic body connects the second disc to the load, preventing the transmission of load fluctuations to the first disc, thereby buffering the energy and reducing the risk of motor breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the actuator uses only an elastic spring to connect the motor to the load, then the structure is simple, but load fluctuations cause motor breakage
Solution Approach 1:
The patent divides the elastic body into two separate functional components: a first elastic body connecting the motor to the first disc, and a second elastic body connecting the load to the second disc portion. This segmentation allows each elastic body to specialize in absorbing specific types of fluctuations, protecting the motor while maintaining structural efficiency.
Solution Approach 2:
The first disc and second disc portion act as intermediary elements between the motor and load. These intermediaries decouple the direct connection, allowing the elastic bodies to absorb fluctuations independently without transmitting them to the motor, thus protecting the motor from load variations.
2Reliability
If the actuator is increased in size to prevent motor breakage, then motor protection is improved, but the actuator becomes larger
Solution Approach 1:
By segmenting the elastic body into two specialized components, each can be optimized for its specific function with smaller dimensions. The first elastic body handles motor-side fluctuations while the second handles load-side fluctuations, allowing both to be more compact than a single oversized elastic body would require.
Solution Approach 2:
The patent changes the parameters of the elastic bodies by using two different elastic bodies with potentially different material properties, dimensions, and stiffness characteristics. This allows optimization of each elastic body's parameters for its specific location and function, achieving better protection with smaller overall size.
3Length of moving object
If the elastic body directly connects the motor to the load, then the transmission path is short, but load fluctuations are transmitted to the motor
Solution Approach 1:
The first disc and second disc portion serve as intermediary elements that break the direct transmission path between motor and load. The first elastic body connects the motor to the first disc, and the second elastic body connects the load to the second disc portion, creating intermediate stages that filter and absorb fluctuations before they reach the motor.
Solution Approach 2:
The transmission path is segmented into two separate elastic connection paths: one from the motor through the first elastic body to the first disc, and another from the load through the second elastic body to the second disc portion. This segmentation allows each path to independently manage fluctuations, preventing their transmission to the motor.
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 effectively restrains motor breakage by buffering external forces and allows for the adjustment of the load without transmitting the fluctuations to the motor, enabling the actuator to be downsized while maintaining functionality.
Implementation Method 1
The elastic body is connected to the second disc portion. The second disc portion is connected to a load. The elastic body restrains transmission of fluctuation of the load to the first disc.
Data Source
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AI summary
[Problem] To provide a drive device and a work machine capable of restraining breakage of a motor. [Solution] A drive device 31 includes a first disc 330, a second disc portion 1340, and an elastic body 350. The first disc 330 is connected to a rotation shaft portion of the motor and rotates with rotation of the rotation shaft portion. The second disc portion 1340 is connected to the first disc 330 and rotates with rotation of the first disc 330. The elastic body 350 is connected to the second disc portion 1340. The second disc portion 1340 is connected to a load. The elastic body 350 restrains transmission of load fluctuation to the first disc 330.