The present application is a national phase of International Application No. PCT/CN2018/098498, titled “ELECTRIC SEAT AND ANGLE ADJUSTMENT DEVICE THEREOF”, filed on Aug. 3, 2018, which claims the benefits of Chinese patent application No. 201711321068.X, entitled “ELECTRIC SEAT AND ANGLE ADJUSTMENT DEVICE THEREOF” and Chinese patent application No. 201721748382.1, entitled “ELECTRIC SEAT AND ANGLE ADJUSTMENT DEVICE THEREOF”, filed with the China National Intellectual Property Administration on Dec. 12, 2017, all of which applications are incorporated herein in their entireties by this reference.

FIELD

The present application relates to the technical field of automobile parts, and in particular to an electric seat and an angle adjustment device for the electric seat.

BACKGROUND

A seat angle adjuster is used for connecting a chair seat and a chair back of an automobile seat. Passengers can obtain the most comfortable and accustomed riding angle by adjusting an angle of the chair back to the optimal position through the seat angle adjuster. Drives can obtain the best view by adjusting the angle of the chair back, and can easily manipulate a steering wheel, a pedal, a shift lever and other operating parts by adjusting the angle of the chair back. With the development of the automobile industry, customers' requirements for the angle adjuster and the comfort performance of the seat are gradually improved.

At present, the electric seat angle adjuster generally adopts a planetary gear transmission principle, and when the members are assembled, due to the existence of a certain degree of processing and assembling errors, there is a certain distance between a driving member and a driving matching surface, and the distance between the driving member and the driving matching surface forms an operating idle stroke of the electric seat angle adjuster.

Due to the existence of the above operating idle stroke, when the chair seat and the chair back are in reversing operation, the driving member must first pass through the operating idle stroke and then be in contact with the driving matching surface, thereby causing the problems of driving out-of-synchronization, backrest adjustment lag, reversing impact noise and the like in the reversing operation process, and causing the poor comfort of the electric seat.

In view of this, a technical problem to be solved urgently by those skilled in the art is how to provide an angle adjuster for an electric seat, which can eliminate or reduce the operating idle stroke of the driving member, thereby improving the comfort of the electric seat.

SUMMARY

In order to solve the above technical problem, an object of the present application is to provide an angle adjustment device for an electric seat, which includes an inner toothed plate and an outer toothed plate engaging with each other, an eccentric cavity is formed between the inner toothed plate and the outer toothed plate, an eccentric ring filling a forward eccentric zone of the eccentric cavity is arranged in the eccentric cavity, the eccentric ring is provided with a first accommodating zone and a second accommodating zone in the circumferential direction, and the angle adjustment device for an electric seat further includes a driving member for driving the eccentric ring to rotate. A damping member is arranged in the first accommodating zone and/or the second accommodating zone, and the damping member is in a compressed state during the working of the driving member.

In the present application, after the damping member is arranged, the damping member can fill the operating idle stroke of the angle adjustment device, so that the damping member is in a compressed state before the driving member is matched with the driving matching surface, and after the driving member is matched with the driving matching surface, the eccentric ring is driven to rotate, achieving the angle adjustment. Therefore, the arrangement of the damping member can eliminate the operating idle stroke described above, thereby eliminating the adjustment lag felt by the passenger during the reversing adjustment process of the seat and the backrest, and the arrangement of the damping member can consume energy when the driving member is in contact with the driving matching surface, thereby reducing the noise during reversing adjustment of the seat and the backrest, and further improving the comfort of the electric seat.

In one embodiment, a wedge-shaped block is arranged in the first accommodating zone, and the driving member can drive the wedge-shaped block or the eccentric ring to drive the eccentric ring to rotate; and the angle adjustment device further includes an elastic member for compressing the eccentric ring and the wedge-shaped block.

In one embodiment, the driving member includes a first driving block extending into the first accommodating zone and a second driving block extending into the second accommodating zone, and each of the first driving block and the second driving block has a driving working surface and a non-driving working surface; and the damping member includes a first damping element arranged in the first accommodating zone and a second damping element arranged in the second accommodating zone, one end of each of the first damping element and the second damping abuts against the non-driving working surface of the relative driving block, and another end of the two damping elements abuts against the side wall of the relative accommodating zone.

In one embodiment, the first accommodating zone is filled with the first driving block and the first damping element, and the second accommodating zone is filled with the second driving block and the second damping element.

In one embodiment, the first damping element and the second damping element are of separate structures.

In one embodiment, the first damping element is a rubber block or a spring, and the second damping element is a rubber block or a spring.

In one embodiment, the damping member is an integrally formed elastic structure and is provided with a groove, the groove is engaged with the eccentric ring, and the first damping element and the second damping element are provide on two sides of the groove, respectively.

In one embodiment, an accommodating groove for engaging with the relative damping element is provided in a side wall of each of the first accommodating zone and the second accommodating zone.

In one embodiment, each of the first damping element and the second damping element is of a blocky structure, and an oil guiding groove is arranged in an outer periphery of each of the first damping element and the second damping element.

In addition, the present application further provides an electric seat which includes a chair seat and a chair back, and the chair seat is connected with the chair back through an angle adjustment device, where the angle adjustment device is the angle adjustment device described above.

