car seat height adjustment mechanism

Abstract

The invention provides a height-regulating mechanism of a vehicle seat. The height-regulating mechanism of the vehicle seat comprises a first bidirectional overrunning clutch and a second bidirectional overrunning clutch which use a pusher dog disc in common. The first bidirectional overrunning clutch comprises a first transmission star wheel, the outer side surface of the first transmission star wheel comprises three sections of first arc surfaces and three sections of second arc surfaces which are arranged circumferentially at intervals, and one first arc surface and one second arc surface are connected through a first arc wedge surface. Springs are respectively arranged between one first arc surface and a circular groove wheel of the pusher dog disc, and two ends of each spring is provided with a roller which is clamped between the first arc wedge surface and the circular groove wheel. The second bidirectional overrunning clutch comprises a second transmission star wheel, the outer side surface of the second transmission star wheel comprises three sections of third arc surfaces and three sections of planes which are arranged circumferentially at intervals, and a third arc surface is connected with the planes through a second arc wedge surface. A pin roller which is clamped between the second arc wedge surface and the inner side surface of the output end shell under the function of an elastic element is arranged between each pusher dog of the pusher dog disc. The height-regulating mechanism of the vehicle is good in self-locking performance, stable in working performance, and high in control precision.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an automobile seat height-adjusting mechanism. Background technique [0002] In order to meet the human body positioning and comfort requirements of drivers and occupants of different heights and shapes in the car body, the height of the seat usually needs to be adjusted, which requires a height adjuster for the car seat. The car seat height adjusters in the prior art generally have defects such as easy damage and low control accuracy. For example, a height adjuster for a car seat height adjustment device disclosed in the utility model patent with the notification number CN201136447Y, the driving force input The end is to transmit torque through the first-stage overrunning clutch, and the handle is reset through the return spring, while the first-stage overrunning clutch and the handle are inserted into the first transmission star wheel through the stud on the handle for forc...

AI Technical Summary

Problems solved by technology

The car seat height adjusters in the prior art generally have defects such as easy damage and low control accuracy. For example, a height adjuster for a car seat height adjustment device disclosed in the utility model patent with the notification number CN201136447Y, the driving force input The end is to transmit torque through the first-stage overrunning clutch, and the handle is reset through the return spring, while the first-stage overrunning clutch and the handle are inserted into the first transmission star wheel through the stud on the handle for force transmission, and the second-stage overrunning The clutch is inserted into the connection plate through the studs on the second transmission star wheel to transmit force. Although this structure is simple, each component is prone to fatigue limit, causing damage, and the control accuracy is low

The utility model patent with the notification number CN202098302U discloses a transmission structure of a car seat height adjuster. A triangular protrusion is arranged on the outside of the first transmission star wheel of the first two-way overrunning clutch to connect with the handle, and on the second transmission star wheel Three special-shaped concave holes, three special-shaped protrusions are set on the claw plate, and the transmission between the first-stage overrunning clutch and the second-stage overrunning clutch is carried out through the cooperation of the special-shaped protrusions and the special-shaped concave holes; this structure is stable. , the force transmission is reliable, the control accuracy is improved, and the force-bearing surface is increased, so that it is not easy to be damaged; and three fan-shaped grooves are set on the input shell, so that the triangular protrusions of the first two-way overrunning clutch are aligned with the three fan-shaped grooves. In order to limit the stroke of the handle, the return spring is omitted, which simplifies the height adjustment mechanism of the car seat; but in the process of use, either the handle operation requires a large torque, which makes the operation laborious and poor in flexibility; or the handle Although the flexibility of operation is good, the self-locking property is poor. There is a phenomenon that the height of the car seat automatically falls after being raised, and the phenomenon of automatically rising after the height of the car seat is lowered. Poor stability of high effect; and short service life

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