General windshield wiper pressure adjusting device for airplanes

Abstract

The invention discloses a general windshield wiper pressure adjusting device for an airplane, and belongs to the field of aviation windshield wiper devices. The general windshield wiper pressure adjusting device comprises a support rod, a swing component and a plate spring. The swinging component comprises a pressure adjusting screw, a base plate, an adjusting plate, a spring, a support arm and arivet, and is arranged between the support rod and the plate spring; one end face of the base plate is of a convex arc structure and is matched with an arc-shaped groove of the support rod. The adjusting plate is of a triangular blocky structure and is located at the joint of the lug piece of the support rod and the support arm. The section of the support arm is of an inverted U-shaped structure,the two ends of the support arm are open, the depth of the U-shaped structure of the support arm is gradually decreased from one end to the other end in the length direction of the support arm, and aninner cavity is used for installing the spring; the pressure adjusting screw is rotated to drive the adjusting plate to rotate, so that the spring is pulled and pressed, and the pressure of the platespring is adjusted; the plate spring used in the device serves as an extension spring pressure adjusting windshield wiper rod piece, and certain pressure is provided for the windshield wiper piece through the elasticity of the plate spring; and the part machining precision and mounting precision are high.

Description

technical field [0001] The invention belongs to the field of aviation wiper devices, and in particular relates to a general-purpose wiper pressure regulating device for aircraft. 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 change more and more. At present, there are three types of commonly used pressure adjustment devices for aviation wipers: [0003] 1. Application No. 201911116734.5 describes "a wiper single spring pressure adjustment device"; [0004] 2. Ap...

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Problems solved by technology

[0006] The pressure regulating devices described in 1 and 2 are tension spring pressure regulating devices, and the principle of pressure regulation is to rotate the regulating wheel threadedly connected with the regulating screw by turning the regulating screw. long, and convert the tension of the spring into the pressure of the wiper lever on the wiper blade; this kind of pressure adjustment device has a complex structure, a large number of parts, and the machining accuracy of the parts and the installation accuracy of the wiper must be strictly controlled

[0007] The structure of the pressure regulating device of the wiper product described in 3 is a plate spring pressure regulating device. Although it is more optimized than the structure of the tension spring pressure regulating device described in 1 and 2, the applicable range of the plate spring pressure regulating device is small, and it is only suitable for the curvature of the glass in the wiper area. In the case of small changes, when the curvature changes are large, the leaf spring pressure adjustment device cannot provide the required pressure value in the wiper area after adjustment

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