Driving Device Locking Unit Prevents Shaft Impact Damage
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Solution Overview
Problem
Conventional driving devices experience power waste and mechanical damage when the motor is stopped, and the shaft is hit, as they require power for braking and are directly impacted.
Innovation Solution
A driving device with a transmission mechanism, driving mechanism, and linkage mechanism, featuring a locking unit that locks the linkage mechanism without power when the transmission mechanism is stopped, preventing power waste and mechanical damage, and utilizing a gear train and angular position sensing unit for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the motor is stopped and the shaft is locked, then power consumption is reduced, but the shaft is vulnerable to impact damage
Solution Approach 1:
The patent applies beforehand cushioning by introducing a shock-absorbing mechanism that prepares protective elements in advance. When the shaft is stopped and locked, the cushioning mechanism is already positioned to absorb potential impact forces, preventing direct transmission of shock to the motor and transmission components while maintaining the locked state for power savings.
Solution Approach 2:
The patent uses an intermediary mechanism between the shaft and the motor/transmission system. This intermediary consists of flexible coupling elements or dampers that decouple the direct connection, allowing the shaft to be locked for power savings while the intermediary absorbs and dissipates impact forces, protecting the motor and transmission components from damage.
2Stability of the object's composition
If the motor continuously applies brake force to the shaft, then the shaft remains stationary, but power is wasted and the motor is damaged when hit
Solution Approach 1:
The patent extracts the braking function from the motor itself and transfers it to a separate mechanical locking mechanism. The motor is completely disconnected from the shaft when not in use, with a locking mechanism (such as a pawl-ratchet system or friction brake) that holds the shaft stationary without requiring motor power, thereby eliminating continuous power waste while maintaining shaft stability.
Solution Approach 2:
The patent implements self-service by designing a passive locking mechanism that automatically maintains the shaft in a stationary position without external power input. The locking mechanism uses spring force, friction, or mechanical interlocking to self-maintain the locked state, eliminating the need for continuous motor braking and associated power consumption.
3Device complexity
If the shaft is directly connected to the motor, then the transmission is simple, but the motor is directly impacted when the shaft is hit
Solution Approach 1:
The patent introduces an intermediary protective mechanism between the motor and shaft connection. This could be a flexible coupling, shock absorber, or decoupling clutch that breaks the direct rigid connection. When impact occurs on the shaft, the intermediary absorbs or isolates the shock, preventing direct transmission to the motor while maintaining functional connection during normal operation.
Solution Approach 2:
The patent applies beforehand cushioning by pre-installing shock-absorbing elements in the transmission path. These elements are positioned in advance to cushion potential impacts before they reach the motor. The cushioning mechanism may include rubber dampers, spring elements, or viscous couplings that are already in place to protect the motor from impact forces.
Data Source
AI summary
A driving device includes: a transmission mechanism; a driving mechanism, moved with the transmission mechanism; a linkage mechanism, moved with the driving mechanism and including a locking unit; and a housing, including an accommodation seat and sealing cover, the accommodation seat accepting the transmission, driving and linkage mechanisms, the sealing cover in combination with the accommodation seat to seal the transmission, driving and linkage mechanisms, one end of the linkage mechanism partly extended out of the sealing seat, and the locking unit partly pressed against an inner side wall of the accommodation seat. Whereby, the transmission mechanism is actuated to drive the driving mechanism to rotate, allowing the driving mechanism to drive the linkage mechanism to rotate; the action of the transmission mechanism is stopped, the locking unit locks the linkage mechanism, thereby capable of preventing power waste and the damage of the transmission mechanism and driving mechanism.