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Actuator lower attachment

A technology of actuators and attachments, applied in transmissions, aircraft transmissions, aircraft power transmission, etc., can solve problems such as increased clearance and increase

Pending Publication Date: 2020-12-15
GOODRICH ACTUATION SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the above reasons, when the SLP is engaged at one or both of the upper and lower attachments, the play can increase, sometimes significantly

Method used

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  • Actuator lower attachment
  • Actuator lower attachment
  • Actuator lower attachment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] figure 1 A known actuator 100 is shown having an upper part 200 and a lower part 300 . For example, actuator 100 may be a Trimmable Horizontal Stabilizer Actuator (THSA) for an aircraft. The actuator 100 has a screw shaft 102 . The lower portion 300 moves along the screw shaft in response to the rotation of the screw shaft 102 . End stops 104a, 104b are mounted on the screw shaft 102 and they limit the range of axial movement of the lower portion 300 along the screw shaft 102 .

[0032] The upper part 200 has a gimbal 202 attachable to the frame of an aircraft (not shown) and an upper attachment 204 also attachable to the frame of the aircraft. During normal operating conditions, the gimbal 202 bears all loads between the actuator 100 and the aircraft, ie it provides the main load path. If the gimbal 202 fails, the upper attachment 204 bears all the loads between the actuator 100 and the aircraft. That is, upper attachment 204 provides a redundant connection (i.e.,...

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PUM

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Abstract

The present invention discloses an actuator lower attachment, and specifically discloses a screw actuator comprising: a main nut; a first secondary nut having a first thread; a second secondary nut having a second thread; and a first attachment device. The first nut, the first secondary nut and the second secondary nut are connected to the first attachment device at a first initial axial spacing between the first secondary nut and the second secondary nut. The first secondary nut is mounted to the first attachment device by a bearing that allows the first secondary nut to rotate relative to the first attachment. The first secondary nut is connected to the second secondary nut through a threaded connection portion having a pitch smaller than a pitch of a thread of the screw actuator shaft.When the main nut fails, the threads of the first and second secondary nuts are rotated relative to each other against the thread load of the screw shaft, and the first and second secondary nuts are moved from a first axial spacing therebetween to a different second axial spacing.

Description

technical field [0001] The present disclosure relates to a lower attachment for an actuator and a method of attaching the actuator to another component, such as an in-flight stabilizer. Background technique [0002] Actuators are common devices that move one part of a mechanical system relative to another. For example, actuators are used extensively throughout aircraft to move flaps and slats relative to the frame of the aircraft to control the aircraft during flight. One type of safety-critical actuator is a trimmable horizontal stabilizer actuator (THSA) that controls a trimmable horizontal stabilizer (THS) on an aircraft. Screw actuators are commonly used in THSA arrangements. The actuator needs to be connected to the frame of the aircraft at one end and to the THS at the other end. The connection to the aircraft frame is generally referred to as the upper attachment and the connection to the THS is generally referred to as the lower attachment. Typically, a screw act...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H25/20F16H25/24B64C13/34
CPCF16H25/205F16H25/2025F16H25/2472B64C13/34F16H25/2204F16H25/2006B64C13/28F16H25/2003F16H25/2015F16H25/2209F16H25/2454F16H2025/2037
Inventor Q.理卡德R.梅迪纳
Owner GOODRICH ACTUATION SYST