High-torque motor drive structure for safety belt, and safety belt winder

Abstract

The invention discloses a high-torque motor drive structure for a safety belt, and a safety belt winder. The high-torque motor drive structure for the safety belt comprises a motor, a speed reductionmechanism assembly, a main gear, a clutch assembly and a mandrel assembly, wherein an output end of the motor is connected with the speed reduction mechanism assembly, an output end of the speed reduction mechanism assembly is in engagement connection with the main gear, the main gear is connected with the mandrel assembly through the clutch assembly, and the mandrel assembly is driven to rotate through the motor; a drive gear is arranged at an output end of the motor, the speed reduction mechanism assembly comprises a swing gear assembly, an eccentric structure assembly and a second-stage transmission gear, the eccentric structure assembly comprises an eccentric shaft and a first-stage transmission gear, and the eccentric shaft and the first-stage transmission gear are integrally arranged; the drive gear is in engagement connection with the first-stage transmission gear, the eccentric shaft is connected with the swing gear assembly, and the swing gear assembly is connected with the second-stage transmission gear; and during rotation of the drive gear, the drive gear is connected with the mandrel assembly through the clutch assembly, and the operation of driving the mandrel assembly to rotate through the motor is realized.

Description

technical field [0001] The invention relates to the technical field of safety belts, in particular to a high-torque motor drive structure for safety belts and a safety belt retractor. Background technique [0002] Seat belts are an essential safety device on a car. They can fasten the occupants firmly to the seats when the vehicle collides or brakes in an emergency. When the vehicle is in an accident, it can protect the safety of the people. It is an important part of the passive safety system. As an important part, pyrotechnic pretensioners are usually used for ignition and detonation in the prior art. Because pyrotechnic pretensioners use detonating gas generating agents to drive the webbing to rewind, they cannot be reused. Once detonated, they must be replaced as a whole, so the cost is relatively high. High, one-time use, irreversible and other characteristics, resulting in limitations in its use. Contents of the invention [0003] Therefore, the present invention pr...

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Problems solved by technology

[0003] For this reason, the present invention provides a high-torque motor-driven structure for seat belts and a seat belt retractor to solve the problems in the prior art that the pyrotechnic pretensioner cannot be reused, is irreversible, and has high cost

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