A nested ball screw pair

A ball screw pair, nested technology, applied in the field of electromechanical servo, can solve the problems of screw stuck, stuck, etc., and achieve the effect of reducing radial occupied space, reducing axial length, and improving assembly manufacturability

Active Publication Date: 2019-07-12
BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In mechanical transmission, due to overload, fatigue and other reasons, the traditional ball screw pair has potential safety hazards of jamming
At present, electromechanical actuators usually ensure that the electrical system has redundant functions, but no effective measures have been taken for the problem of screw jamming

Method used

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  • A nested ball screw pair
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Embodiment Construction

[0018] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0019] This patent takes high reliability electromechanical actuators as the research background, and aims to solve the problem of screw jamming, and proposes a nested ball screw transmission mechanism with double redundancy function to ensure that the electromechanical actuator has a one-time failure operation. ability.

[0020] This patent discloses a nested ball screw pair with double redundancy function, which is assembled from an inner screw pair and an outer screw pair. The inner lead screw and the outer lead screw have the same lead and opposite direction of rotation. The main and backup work. Through stroke compensation, it can ensure that when the main working screw is stuck at any position, the backup screw can work at full stroke.

[0021] Such as figure 1 Shown is a schematic diagram of a nested screw pair. It can be seen from the ...

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Abstract

The invention discloses a nested ball lead screw pair, and relates to the field of electromechanical servo. The nested ball lead screw pair comprises an outer lead screw nut, an outer lead-screw screwrod, an inner lead screw nut, an inner lead-screw screw rod, a transmission gear, a flat key, a brake rotor, a brake stator and a shell; the outer lead-screw screw rod is mounted on the outer wall ofthe inner lead screw nut in a sleeving mode, the outer lead screw nut is mounted on the outer wall of outer lead-screw screw rod in a sleeving mode; the transmission gear and the outer lead screw nutare connected through the flat key; the inner lead-screw screw rod extends into the inner wall of the inner lead screw nut in the axial direction; the outer wall of one end of the axial direction ofthe inner lead-screw screw rod is wrapped with the brake rotor, and the outer wall of the brake rotor is wrapped with the brake stator; the shell is fixedly mounted on the outer wall of the inner leadscrew nut in a sleeving mode; and the shell and the inner lead screw nut are connected through a second guiding key. According to the nested ball lead screw pair, the lead screw pair has the characteristics of double redundancy, an outer lead screw is a main working transmission pair, an inner lead screw serves as a backup, and the fact that the lead screw pair can continue to work in the case offirst-stage breakdown is ensured.

Description

technical field [0001] The invention relates to the field of electromechanical servo, in particular to a nested ball screw pair. Background technique [0002] Electromechanical actuators are widely used in the field of servo technology due to their high transmission precision, fast response and easy maintenance. Ball screw transmission is one of the common transmission forms of linear electromechanical actuators. Judging from the development status at home and abroad, high reliability is the most important factor restricting the wide application of electromechanical actuators in the aviation field. In order to improve the reliability of the electromechanical actuator, the electromechanical actuator needs to have the ability to work under failure. In mechanical transmission, the traditional ball screw pair has potential safety hazards of jamming due to overload, fatigue and other reasons. At present, electromechanical actuators usually ensure that the electrical system has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H25/22
Inventor 董辉立牛涛宋洪舟鲁玥倪永健
Owner BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS
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