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Inner circulation ball screw component for airplane electric brake

A technology of ball screw and internal circulation, applied in mechanical equipment, belts/chains/gears, transmission devices, etc., can solve problems such as limited structural space and inability to meet the requirements of electric braking torque

Inactive Publication Date: 2015-04-08
XIAN AVIATION BRAKE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the prior art that cannot meet the torque requirements of electric brakes and the limited structural space, the present invention proposes an internal circulation ball screw assembly for aircraft electric brakes

Method used

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  • Inner circulation ball screw component for airplane electric brake
  • Inner circulation ball screw component for airplane electric brake
  • Inner circulation ball screw component for airplane electric brake

Examples

Experimental program
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Effect test

Embodiment Construction

[0019] This embodiment is an internal circulation ball screw assembly for aircraft electric brakes, including a nut 1 , a screw 2 , a ball 3 and a reverser 4 . The nut 1 is a hollow rotating body, and the inner surface is processed with a helical semicircular groove. The lead screw 2 is located in the nut, and one end of the lead screw 2 is processed with a helical semicircular groove. After the nut is matched with the lead screw, the semicircular grooves respectively located on the nut and the lead screw are combined to form a circular groove, which is the ball raceway 5 .

[0020] Several balls 3 are placed in each of the ball raceways 5 . Between two adjacent ball raceways, a reverser mounting groove is processed. The included angle between the length direction centerline of each retroverter installation groove and the centerline of the lead screw is 45°; the misalignment between the adjacent retroverter installation grooves makes the adjacent There is no interference be...

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PUM

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Abstract

An inner circulation ball screw component for an airplane electric brake. The inner circulation ball screw component comprises a nut, a screw, balls and returning devices, wherein the screw is located in the nut, spiral ball rollaway nests are disposed between the screw and the nut, one returning device is mounted between every two rollaway nests on the screw, balls enter each returning device from one rollaway nest and return to the initial rollaway nest through a ball returning groove in the returning device, the balls rolls in a closed inner circulation loop formed by the screw, the nut and the returning devices in a circulation manner, the balls are allowed to move linearly along with the screw relative to the nut, and the working travel of the screw is increased. The inner circulation ball screw component has the advantages that large moment can be transmitted to satisfy the moment requirements of the airplane electric brake, the internal space of the screw is sufficient, and electric brake parts can be mounted in a screw inner hole.

Description

technical field [0001] The invention relates to an electric brake actuator, in particular to an inner circulation ball screw assembly for an electric brake. technical background [0002] Aircraft electric brakes are a new technology that has been applied in recent years. Electric brakes generally use electromechanical actuators as brake actuators. The electromechanical actuator generally uses a ball screw to convert the rotational torque from the motor and the reduction mechanism into a linear force, which is used as a brake for power output. A ball screw consists of a nut, a screw, balls and a reverser. The inner surface of the nut and the outer surface of the lead screw are respectively processed with spiral raceways. During operation, the balls roll in the spiral raceway formed by the nut and the lead screw. Ball screws are generally divided into two types: screw driven and nut driven. Compared with the screw drive type, the nut drive type has a great advantage in term...

Claims

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Application Information

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IPC IPC(8): F16H25/22F16H25/24
CPCF16H25/2204F16H25/24
Inventor 丁斌张洁邵养鹏李萍
Owner XIAN AVIATION BRAKE TECH
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