Electric brake actuator integrating force sensor and ball screw

A technology of ball screw and force sensor, which is applied in the direction of brakes, brake transmission devices, vehicle components, etc., can solve the problems of low transmission efficiency, short service life, large structure volume, etc., and achieve improved measurement accuracy, small deformation, and easy-to-achieve effects

Active Publication Date: 2015-03-25
XIAN AVIATION BRAKE TECH
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  • Abstract
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Problems solved by technology

[0007] In order to overcome the shortcomings of low transmission efficiency, short service life and large structural vol...

Method used

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  • Electric brake actuator integrating force sensor and ball screw
  • Electric brake actuator integrating force sensor and ball screw
  • Electric brake actuator integrating force sensor and ball screw

Examples

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Embodiment Construction

[0026] This example is an electric brake actuator integrated with a force sensor and a ball screw, including a housing, a ball screw assembly, a needle bearing 7, a force sensor assembly 6, a data line 4, a push rod 8, and a thrust needle roller Bearing 10, deep groove ball bearing 11, preload spring 14, spring pad 15, collar 16, dynamic sealing ring 13 and heat insulation pad 17.

[0027] The housing includes a middle housing 9, a lower housing 12 and a housing upper cover 1, and the ball screw assembly is located in the housing. The ball screw assembly includes a lead screw 3 , a nut 2 and a ball 5 . The upper part of the outer peripheral surface of the nut 2 in the ball screw assembly cooperates with the inner surface of the middle housing through the needle bearing 7; The inner surface of the upper hole wall at the maximum aperture is matched; the outer circumferential surface at the lower end of the nut 2 is matched with the inner surface of the lower housing 12 through ...

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Abstract

The invention provides an electric brake actuator integrating a force sensor and a ball screw. A ball screw assembly is located in a shell; a nut is cylindrical and the screw is shell-shaped; spiral semicircular grooves are machined in the inner surface of the nut and the outer surface of the screw respectively; the radiuses of the spiral semicircular grooves in the inner surface of the nut and the outer surface of the screw are the same and spiral angles are the same; and after the spiral semicircular grooves in the inner surface of the nut and the outer surface of the screw are matched to form a round spiral groove, a closed spiral rolling path is formed and a ball rolls in the closed spiral rolling path. According to the electric brake actuator, the force sensor and the ball screw are integrated; the force sensor is located in an inner hole of the ball screw so that the loss in a force transmission process is reduced; and the measurement precision is improved to 3 per mill from 1% in the prior art. The electric brake actuator also has the advantages of simple structure and easiness in realization.

Description

technical field [0001] The invention relates to an aircraft electric brake actuator, in particular to an aircraft electric brake actuator structure integrating a force sensor and a ball screw. technical background [0002] Aircraft electric brakes are a new technology that has been applied in recent years. Electric brakes use electromechanical actuators as brake actuators. Electromechanical actuators are generally composed of drive motors, reduction gears, and ball screws. The electromechanical actuator generates power when it works, and squeezes the brake disc to make the dynamic and static brake discs rub against each other to generate braking torque. The electromechanical actuator adopts multi-stage deceleration, and the transmission chain is complex. To make the actuating force generated by the electromechanical actuator meet certain control accuracy requirements, it is necessary to use a force sensor in the electromechanical actuator for closed-loop control. [0003] ...

Claims

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Application Information

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IPC IPC(8): B64C25/42B60T13/74
Inventor 丁斌张洁乔勇李萍
Owner XIAN AVIATION BRAKE TECH
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