Vehicle, seat and bidirectional driving device of seat

Abstract

The invention discloses a bidirectional driving device for a seat height adjustor. The bidirectional driving device comprises a retarding piece, a driving plate, a ratchet wheel and a separating piece used for being fixed to a height adjustor body. Transition belts used for shielding part of the ratchet wheel are arranged on the separating piece, symmetrical portions of the retarding piece are sleeved with a set of pawls in a rotating mode, and the pawls are connected with the driving plate in a relative rotating mode. In a non-working state, the pawls are separated from the ratchet wheel; in a working state, the driving plate can drive the pawls to conduct revolution, and the retarding piece retarding rotation through the separating piece drives the pawls to conduct autorotation and be meshed with an inner-ring ratchet of the ratchet wheel. According to the device, under the retarding effect of the retarding piece and the separating piece, matching between the pawls and the ratchet wheel is achieved, and the effect that the driving plate enables the ratchet wheel to conduct unidirectional rotation is achieved, so that the operating movement range is saved; the symmetrical pawls are arranged on the driving plate and the retarding piece, and therefore stress balance of the ratchet wheel in the rotation process can be achieved. The invention further discloses a seat comprising the bidirectional driving device and a vehicle.

Description

technical field [0001] The invention relates to the technical field of mechanical manufacturing, and more specifically, relates to a bidirectional drive device. In addition, the present invention also relates to a seat comprising the above bidirectional drive device and a vehicle comprising the above seat. Background technique [0002] At present, with the continuous improvement of people's living standards, the market has higher and higher requirements for the appearance and safety of various types of seat adjustment devices. [0003] The manual height adjuster of the car seat is composed of a driving part and a locking part. The operation of the driving part is to drive the operating handle to rotate clockwise from the middle position on the side of the input end, and drive the output end to rotate clockwise. When the input end reaches the limit position At this time, the output end also stops rotating, and then the operating handle returns to the middle position under th...

AI Technical Summary

Problems solved by technology

However, in the above structure, only one end of the external pawl cooperates with the ratchet when it is meshed with the ratchet, which is likely to cause the ratchet to be biased and eccentric relative to the central axis. The greater the driving force, the greater the biased load; Under normal circumstances, repeated use will cause uneven wear. To balance the force on the ratchet, two pawls can be arranged symmetrically, but it will inevitably increase the size and affect the applicability.

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