A wiper with automatic adjustment of the pressing force of the scraping arm

Abstract

The invention relates to a windscreen wiper with automatic adjustment of a wiping-arm pressing force. The windscreen wiper comprises a motor linking rod assembly (1), wiping arms (2) and wiping pieces (3), wherein two wiping arms (2) and two wiping pieces (3) are respectively arranged; the wiping pieces (3) are arranged on the corresponding wiping arms (2); the motor linking rod assembly (1) drives the wiping arms (2) to do reciprocating and circulating movement around an output shaft; each wiping arm (2) comprises a wiping rod head (21), a main tension spring (22), an extension arm (23) and a wiping rod (24). The windscreen wiper is characterized in that the extension arm (23) and the wiping rod (24) are in sliding connection, the wiping rod (24) is inserted into the extension arm (23) and an auxiliary compression spring (26) is arranged between the wiping rod (24) and the extension arm (23). The auxiliary compression spring (26) is sheathed on the wiping rod (24); one end of the auxiliary compression spring (26) is arranged on a boss structure of the wiping rod (24) in a supporting manner, and the other end of the auxiliary compression spring (26) is arranged on a groove shoulder of the inner wall of the extension arm (23) in a supporting manner. The windscreen wiper has the advantages that the basically-constant wiping-arm pressing force can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of wipers for automobiles, in particular to a wiper with automatically adjustable pressing force of a wiper arm. Background technique [0002] At present, the number of domestic cars has exceeded 130 million. Private cars have entered thousands of households. The traffic pressure is increasing day by day. Car wipers, as an active safety component to protect driving safety in rainy days, can provide a clear vision, which is its top priority. . The rubber strip of the wiper blade of the car wiper plays a vital role. The material of the rubber strip is generally synthetic rubber, which is easy to wear and age. If the pressing force is too small, the bonding force between the rubber strip and the windshield will be insufficient, and there will be risks of missing scratches and shaking. Therefore, the industry standard stipulates that the pressing force of the wiper blade should not be less than 0.12N / m, and for...

AI Technical Summary

Problems solved by technology

The rubber strip of the wiper blade of the car wiper plays a vital role. The material of the rubber strip is generally synthetic rubber, which is easy to wear and age. If the pressing force is too small, the bonding force between the rubber strip and the windshield will be insufficient, and there will be risks of missing scratches and shaking. Therefore, the industry standard stipulates that the pressing force of the wiper blade should not be less than 0.12N / m, and for high-speed National standards also give mandatory requirements for the cleanliness of the wiper when driving, but excessive pressing force will easily accelerate the wear of the rubber strip, and it will also easily cause problems such as noise and jitter

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