Height adjusting device for seat

Abstract

A seat height adjustment device belongs to vehicle seat accessories. Including: the central shaft connected with the tooth plate on the seat and the entire height adjustment device, the connecting plate fixed with the side plate of the seat basin, the return spring, the transmission mechanism has a pair of interacting pawls and ratchet wheels, and the accommodating pawl The ratchet plate, the anti-backlash plate to eliminate the axial gap, the shift block for the transmission torque, the wheel housing for accommodating the transmission block and the roller, the shaft sleeve, the wrench cover connected with the wrench, the gasket and the circlip. Advantages: small size, simple structure, easy assembly, and only one height adjuster needs to be installed on each seat, which can save the cost of use; good movement flexibility and firm locking; friction transmission is used, and there is no gap between the parts Clearance, no gear position, soft, flexible and labor-saving operation, which can ensure the adjustment accuracy; no clearance in the axial direction; small reciprocating movement range of the wrench, which can effectively increase the use space of the seat; it can realize the connection with any seat, and Simple connection and wide application range.

Description

technical field [0001] The invention belongs to the technical field of vehicle accessories, and in particular relates to a vehicle seat height adjusting device which is installed on a seat and can properly adjust the seat height. Background technique [0002] The function of the seat height adjustment device is as mentioned above, and it is responsible for changing the height position of the seat. As such a device, it must be equipped on a mid-to-high-end car seat. At present, the more common seat height adjustment devices applied to motor vehicle seats in the market, for example: Chinese Invention Patent Application Publication No. CN1799899A, titled "Seat Height Adjustment Device" provides a mechanical A seat adjustment device that can be finely adjusted by locking to increase seat rigidity and improve operability. In the seat height adjusting device, the latch plate is intermittently engaged with the spur gear by operating the handle, and the seat is raised and lowered b...

AI Technical Summary

Problems solved by technology

The problems in the above structure: First, using the principle of mechanical gear transmission to realize the lifting action, not only the structure is complicated, there are many parts, but also at least two height adjustment devices need to be installed on one seat, which is costly; secondly, the use of worm gear Transmission, large speed ratio, slow adjustment speed and cumbersome operation; moreover, there are installation gaps between parts, resulting in poor adjustment accuracy

The above-mentioned height adjustment device operated by handwheel has problems: 1. Handwheel operation is used, and the hand feeling is poor; 2. One-way positioning is realized through the combination of the internal gear and the dial block, and the locking firmness is poor; 3. In order to To ensure the adjustment accuracy, the processing requirements for the parts are high, the manufacturing is difficult, and it is difficult to ensure the rigidity

[0004]For another example, the China Invention Patent Authorization Notice No. CN101323264B discloses a "seat height adjustment device". It is a seat height adjustment device with low adjustment, high precision, reliable locking, small reciprocating movement range of the wrench, and can be connected with any seat to adjust the height of the seat. However, the following problems are exposed in the actual use process: 1. . Due to the use of two sets of transmission mechanisms, the structure is more complex, the parts require high machining accuracy, and the volume is large; 2. Since the second cover is responsible for the installation and rolling functions, it is difficult to process and the strength of the parts is difficult to guarantee

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