CN108054033B - 一种固定式前轮载开关触发机构 - Google Patents

一种固定式前轮载开关触发机构 Download PDF

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CN108054033B
CN108054033B CN201711345283.3A CN201711345283A CN108054033B CN 108054033 B CN108054033 B CN 108054033B CN 201711345283 A CN201711345283 A CN 201711345283A CN 108054033 B CN108054033 B CN 108054033B
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switch
wheel
load switch
contact
cam
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CN108054033A (zh
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雷驰
刘远平
安涛
赵嘉俊
隋成国
许杰
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AVIC (Chengdu) UAV System Co.,Ltd.
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AVIC Chengdu Aircraft Design and Research Institute
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/02Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/16Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/32Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/42Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric

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  • Multiple-Way Valves (AREA)
  • Mechanisms For Operating Contacts (AREA)

Abstract

本发明属于航空领域,涉及到一种固定式前轮载开关触发机构。由接触耳片(1)、扭力臂(2)、轮载开关(3)、回中上凸轮(4)、回中下凸轮(5)组成;由于轮载开关安装在固定结构上,所以对开关的线缆无拖拽,可有效防止开关线缆损坏并能实现前轮360°旋转而不拉断线缆。通过与支柱回中凸轮配合,将接触开关或接近开关安装于固定结构上,通过与安装于上扭力臂上的接触结构作用,接通或断开开关,从而为飞机提供前轮载信号。支柱中的回中凸轮能保证飞机前轮离地时回中,此时接触结构位于确定位置,即可通过接触结构触发开关,飞机接地时轮载开关断开,前轮可自由旋转。

Description

一种固定式前轮载开关触发机构
技术领域
本发明属于航空领域,涉及到一种固定式前轮载开关触发机构。
背景技术
当前飞机的前轮载提供方式中大多安装在上扭力臂上,通过上扭力臂的偏转实现对接触开关或接近开关的挤压得到前轮载信号。这种方式有个严重的弊端,因为接触开关或接近开关安装在活动的部件上,在前轮转弯或支柱上、下抖动时都会对开关的线缆造成拉扯。对于大角度前轮转弯的飞机上,由于开关线缆的影响,通常无法实现过大角度的前轮偏转以防止接触开关或接近开关的线缆拉断。
本机构通过与支柱内回中凸轮配合,实现在固定结构上安装接触开关或接近开关,从而防止由于前轮左右偏转对开关线缆造成拉扯,从而为实现理论上360°的前轮转向提供可能。
发明内容
技术方案:
一种固定式前轮载开关触发机构,由接触耳片(1)、扭力臂(2)、轮载开关(3)、回中上凸轮(4)、回中下凸轮(5)组成;所述接触耳片(1)安装于扭力臂(2)上,其安装角度保证在前支柱放下至全伸长时接触耳片(1)处于水平位置。轮载开关(3)通过支架安装于支柱外筒上并与接触耳片(1)对齐。该机构应与前支柱回中上凸轮(4)、下凸轮(5)配合使用。当飞机接地时,回中上凸轮(4)随活塞杆向上运动从而与下凸轮(5)脱开,此时前轮可以自由旋转;当飞机前轮离地后,回中上凸轮(4)随活塞杆向下运动与下凸轮(5)啮合,从而保证在前支柱全伸长时,飞机前轮连同扭力臂(2)的位置确定,此时接触耳片(1)触发轮载开关(3)产生飞机离地信号。
所述的轮载开关(3)包括接近开关或接触开关。
本发明具有的优点和有益效果:本发明能够实现在固定结构上安装接触开关或接近开关,从而避免对开关线缆造成拉扯,防止线缆拉断,从而允许前轮实现360°偏转。
附图说明
图1支柱全伸长位置机构状态
图2支柱压缩位置机构状态
其中1-接触耳片、2-扭力臂、3-轮载开关、4-回中上凸轮、5-回中下凸轮;
具体实施方式
一种固定式前轮载开关触发机构,由接触耳片(1)、扭力臂(2)、轮载开关(3)、回中上凸轮(4)、回中下凸轮(5)组成;所述接触耳片(1)安装于扭力臂(2)上,其安装角度保证在前支柱放下至全伸长时接触耳片(1)处于水平位置。轮载开关(3)通过支架安装于支柱外筒上并与接触耳片(1)对齐。该机构应与前支柱回中上凸轮(4)、下凸轮(5)配合使用。当飞机接地时,回中上凸轮(4)随活塞杆向上运动从而与下凸轮(5)脱开,此时前轮可以自由旋转;当飞机前轮离地后,回中上凸轮(4)随活塞杆向下运动与下凸轮(5)啮合,从而保证在前支柱全伸长时,飞机前轮连同扭力臂(2)的位置确定,此时接触耳片(1)触发轮载开关(3)产生飞机离地信号。
所述的轮载开关(3)包括接近开关或接触开关。
当支柱全伸长时,活塞杆由于支柱内气压作用向下运动带动上扭力臂(2)向下偏转,接触耳片(1)上翘,从而接通轮载开关(3),此时支柱回中上凸轮(4)回中下凸轮(5)处于啮合状态。
当支柱由于受载荷压缩,回中上凸轮(4)从回中下凸轮(5)的凹槽中提起,前轮即可自由旋转。同时上扭力臂(2)向上偏转,接触耳片(1)下转,从而断开轮载开关。此时接触耳片(1)与轮载开关(3)无接触且无机械连接,转向机构即可自由旋转。

Claims (2)

1.一种固定式前轮载开关触发机构,由接触耳片(1)、扭力臂(2)、轮载开关(3)、回中上凸轮(4)、回中下凸轮(5)组成;其特征在于:所述接触耳片(1)安装于扭力臂(2)上,其安装角度保证在前支柱放下至全伸长时接触耳片(1)处于水平位置;轮载开关(3)通过支架安装于支柱外筒上并与接触耳片(1)对齐;该机构与前支柱回中上凸轮(4)、回中下凸轮(5)配合使用,回中下凸轮(5)为固定件与前支柱非偏转部件固定;当飞机接地时,回中上凸轮(4)随活塞杆向上运动从而与回中下凸轮(5)脱开,此时前轮可以自由旋转;当飞机前轮离地后,回中上凸轮(4)随活塞杆向下运动与回中下凸轮(5)啮合,从而保证在前支柱全伸长时,飞机前轮连同扭力臂(2)的位置确定,此时接触耳片(1)触发轮载开关(3)产生飞机离地信号。
2.根据权利要求1所述的一种固定式前轮载开关触发机构,其特征在于:所述的轮载开关(3)包括接近开关或接触开关。
CN201711345283.3A 2017-12-14 2017-12-14 一种固定式前轮载开关触发机构 Active CN108054033B (zh)

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CN109533299B (zh) * 2018-11-30 2024-03-22 四川腾盾科技有限公司 一种无人机起落架轮载开关的触发机构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3559927A (en) * 1968-08-21 1971-02-02 Fairey Canada Ltd Helicopter rapid securing device
FR2273710A1 (fr) * 1974-06-06 1976-01-02 Automotive Prod Co Ltd Train d'atterrissage pour aeronef
US5984241A (en) * 1997-09-08 1999-11-16 Mpc Products Corporation Bi-directional, dual acting, electric safety lock
CN102060104A (zh) * 2010-11-19 2011-05-18 陕西飞机工业(集团)有限公司 微动电门组件

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3559927A (en) * 1968-08-21 1971-02-02 Fairey Canada Ltd Helicopter rapid securing device
FR2273710A1 (fr) * 1974-06-06 1976-01-02 Automotive Prod Co Ltd Train d'atterrissage pour aeronef
US5984241A (en) * 1997-09-08 1999-11-16 Mpc Products Corporation Bi-directional, dual acting, electric safety lock
CN102060104A (zh) * 2010-11-19 2011-05-18 陕西飞机工业(集团)有限公司 微动电门组件

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Address after: 611731, No. four, West core road, hi tech West District, Sichuan, Chengdu

Patentee after: AVIC (Chengdu) UAV System Co.,Ltd.

Address before: 610091 planning and Development Department of Chengdu aircraft design and Research Institute, 1610 Riyue Avenue, Qingyang District, Chengdu City, Sichuan Province

Patentee before: AVIC CHENGDU AIRCRAFT DESIGN & Research Institute