Hydraulic wiper blade

Abstract

The invention relates to a hydraulic wiper blade which comprises a rubber strip. The back surface of the rubber strip is fixedly connected to a pressure spring; a hydraulic chamber is formed by surrounding a cavity casing with rod-shaped outer appearance and groove-shaped cross section and the pressure spring and filled with liquid; a cylinder part for accommodating a piston is arranged on the cavity casing; and the piston is positioned at the exposed outer part and matched with a wiper rod in a clipping manner. The invention adopts the cavity casing to replace the prior framework structure and utilizes the principle of hydraulic power transmission to ensure that the pressure from a wiper arm uniformly acts on the rubber strip of the wiper blade, thereby reducing the generation of drain marks and greatly improving the scraping cleanliness and the service life of the wiper blade.

Description

technical field

[0001] The invention relates to the field of automobiles, in particular to a hydraulic wiper blade. Background technique

[0002] At present, wiper blades are divided into two types: skeleton type wiper blades and boneless wiper blades (also called flat blades). Then the force is transmitted to the rubber strip through the skeleton structure or the clip spring (steel sheet, or elastic guide strip).

[0003] Due to the limited rigidity of the skeleton structure or compression spring, the force cannot be transmitted to all points on the scraper blade evenly, and the force on each point of the rubber strip on the scraper blade is uneven, resulting in many water marks, which affects the scraping degree. At the same time, uneven pressure is also the root cause of jitter and abnormal noise.

[0004] In addition, the cost of the flat scraper is relatively expensive, and the technical requirements are high, and the processing technology is complicated, which is mai...

Images