Windshield wiper single-spring pressure adjusting device

Abstract

The invention relates to a windshield wiper single-spring pressure adjusting device, and belongs to aviation windshield wiper devices. The device comprises a windshield wiper rod, a supporting arm, aswing block, a pressure adjusting screw, an adjusting wheel, a supporting piece, a small shaft and a spring, wherein the large end of the supporting arm is installed at one end of a cavity of the swing block through a rivet, and the small end of the supporting arm is fixed at the bottom end of the windshield wiper rod through a rivet; And the pressure adjusting screw and the adjusting wheel are installed in the cavity of the swing block, the pressure adjusting screw and the adjusting wheel are meshed with each other, the spring is installed in a cavity of the supporting arm, one end of the spring is connected with the adjusting wheel through the supporting piece, and the other end of the spring is fixed to the inner wall of the small end of the supporting arm through a rivet. The pressureof a wiper blade can be adjusted to a required value through the device. The device is compact in structure, has a wiper pressure adjusting function, has no obvious change in appearance structure andhas little influence on aerodynamic force of an airplane and the view of a pilot.

Description

technical field [0001] The invention belongs to the field of aviation wiper devices, in particular to a wiper single spring pressure regulating device. Background technique [0002] At present, aviation wipers are different from automobile wipers. The installation space is complex, resulting in a large accumulation of installation errors. At the same time, the flying speed of a helicopter is above the speed of a general car, and it is also below the speed of a transport aircraft. The wiper pressure of the wiper is required to be between the two, generally It is required to be between 16N and 23N. With the development of sightseeing helicopters, the shape of the glass will also increase, and the curvature will also change. At this stage, there are two adjustment methods for aviation wipers, one is tension spring pressure adjustment , and the other is plate spring pressure adjustment. Among them, the application number is 201521020002.3, which describes "a pressure adjustment ...

AI Technical Summary

Problems solved by technology

[0002] At present, aviation wipers are different from automobile wipers. The installation space is complex, resulting in a large accumulation of installation errors. At the same time, the flying speed of a helicopter is above the speed of a general car, and it is also below the speed of a transport aircraft. The wiper pressure of the wiper is required to be between the two, generally It is required to be between 16N and 23N. With the development of sightseeing helicopters, the shape of the glass will also increase, and the curvature will also change. At this stage, there are two adjustment methods for aviation wipers, one is tension spring pressure adjustment , and the other is plate spring pressure adjustment. Among them, the application number is 201521020002.3, which describes "a pressure adjustment device for wiper products" as shown in the figure below. It is suitable for small and large curvature changes in the wiper area. After the pressure adjustment device is adjusted, it cannot provide the required pressure of 16N to 23N in the wiper area; although it can be realized by using a tension spring, the installation and parts processing accuracy must be strictly controlled. In this way, not only the wiper installation accuracy must be strictly controlled, but the parts processing There is also the problem of increased cost, and there is also no adjustment link for the pressure change caused by the permanent deformation of the tension spring during the life cycle of the wiper, resulting in a decrease in the wiper effect of the wiper

Images