WO2022121791A1 - 一种防护装置及高空作业设备 - Google Patents

一种防护装置及高空作业设备 Download PDF

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Publication number
WO2022121791A1
WO2022121791A1 PCT/CN2021/135277 CN2021135277W WO2022121791A1 WO 2022121791 A1 WO2022121791 A1 WO 2022121791A1 CN 2021135277 W CN2021135277 W CN 2021135277W WO 2022121791 A1 WO2022121791 A1 WO 2022121791A1
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WO
WIPO (PCT)
Prior art keywords
cover
movable pulley
push rod
pull
protective device
Prior art date
Application number
PCT/CN2021/135277
Other languages
English (en)
French (fr)
Inventor
李希平
刘国良
郑继平
Original Assignee
湖南星邦智能装备股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 湖南星邦智能装备股份有限公司 filed Critical 湖南星邦智能装备股份有限公司
Priority to US18/265,243 priority Critical patent/US20240003177A1/en
Priority to EP21902498.1A priority patent/EP4227482A1/en
Publication of WO2022121791A1 publication Critical patent/WO2022121791A1/zh

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    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F11/00—Man-operated mechanisms for operating wings, including those which also operate the fastening
    • E05F11/02—Man-operated mechanisms for operating wings, including those which also operate the fastening for wings in general, e.g. fanlights
    • E05F11/04—Man-operated mechanisms for operating wings, including those which also operate the fastening for wings in general, e.g. fanlights with cords, chains or cables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/60—Suspension or transmission members; Accessories therefor
    • E05Y2201/622—Suspension or transmission members elements
    • E05Y2201/644—Flexible elongated pulling elements
    • E05Y2201/654—Cables
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/60—Suspension or transmission members; Accessories therefor
    • E05Y2201/622—Suspension or transmission members elements
    • E05Y2201/658—Members cooperating with flexible elongated pulling elements
    • E05Y2201/668—Pulleys; Wheels
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2999/00—Subject-matter not otherwise provided for in this subclass

Definitions

  • the present application relates to the field of construction machinery and equipment, in particular to a protective device, and also to an aerial work equipment including the above protective device.
  • the power, hydraulic and electrical devices of aerial work equipment are usually set in a closed protective device to prevent collision and rain, and also to prevent operators from being injured by touching the above devices.
  • the cover of the guard can usually be opened and closed.
  • the edge of the cover will be in a higher position. It is difficult for the operator to touch the cover while standing on the ground, and it is necessary to climb to a higher place with the help of foreign objects.
  • To close the cover it is not only inconvenient to operate, but also has certain potential safety hazards.
  • One object of the present application is to provide a protective device, which can effectively solve the problem of inconvenient closing of the cover, and another object is to provide an aerial work equipment including the above protective device.
  • a protective device includes a bracket and a cover, the upper side of the cover is hinged with the upper side of the bracket, and also includes a pull-down device, the pull-down device includes a fixed pulley, a movable pulley, a push rod and a pull rope, the The fixed pulley is fixedly connected with the cover, the movable pulley is located above the fixed pulley, the movable pulley is slidably connected with the cover, and the fixed end of the pulling rope bypasses the movable pulley and is connected with the fixed pulley, The upper end of the push rod is connected with the movable pulley, and the push rod and the movable pulley make the handle end of the pull rope hang down under the action of gravity, and the handle end of the pull rope is pulled down, and the cover Moving down, after the lower end of the push rod is in contact with the bracket, the movable pulley is pushed up to drive the handle end of the pulling rope to move up.
  • the pull-down device further includes a support plate, the support plate is fixedly connected to the cover, a chute is provided on the support plate, the fixed pulley is disposed at the bottom of the support plate, and the movable pulley slidingly connected with the chute.
  • the support plate is fixedly connected to the inner side wall of the cover.
  • the upper end of the push rod is hinged with the movable pulley.
  • the bottom of the bracket is provided with a limiting portion for abutting against the push rod.
  • the upper part of the limiting part and the lower end of the push rod are respectively provided with cushion blocks.
  • it also includes an elastic member, two ends of the elastic member are respectively connected with the cover member and the movable pulley, and the movable pulley moves downward under the action of its gravity and the elastic force of the elastic member; the elastic member The push rod is compressed and deformed after the push rod abuts against the bracket.
  • the elastic member is a spring
  • the upper end of the spring is connected to the cover member
  • the lower end of the spring is connected to the movable pulley
  • the pull-down device includes a plurality of the fixed pulleys and a plurality of the movable pulleys, and the pulling ropes bypass the fixed pulleys and the movable pulleys in sequence.
  • a high-altitude working equipment comprising the protective device described in any one of the above.
  • a protective device and aerial work equipment provided by the present application include a bracket and a cover, the upper side of the cover is hinged with the upper side of the bracket, and also includes a pull-down device, and the pull-down device includes a fixed pulley, a movable pulley, a push rod and a pull rope
  • the fixed pulley is fixedly connected with the cover
  • the movable pulley is located above the fixed pulley
  • the movable pulley is slidably connected with the cover
  • the fixed end of the pull rope bypasses the movable pulley and is connected with the fixed pulley
  • the upper end of the push rod is connected with the movable pulley.
  • the push rod and the movable pulley move downward under the action of gravity, so that the handle end of the pull rope hangs down, which is convenient for the operator to pull the handle end;
  • the cover needs to be closed, the handle end is pulled down , the cover moves down, when the lower end of the push rod is in contact with the bracket, the pulley is pushed up, and the handle end of the pull rope is moved up at this time, so as to store the pull rope.
  • the pull-down device is a purely mechanical structure, and there is no need to pull the rope through a motor, so the structure is simple and easy to maintain.
  • FIG. 1 is a schematic structural diagram of a protective device provided by a first specific embodiment of the application when it is in a closed state;
  • Fig. 2 is the structural representation of the pull-down device in Fig. 1;
  • FIG. 3 is a schematic structural diagram of the first protective device when it is in an open state
  • FIG. 4 is a schematic structural diagram of the pull-down device in FIG. 3;
  • FIG. 5 is a schematic structural diagram of a protective device having a plurality of fixed pulleys and movable pulleys in a closed state
  • FIG. 6 is a schematic structural diagram of the pull-down device in FIG. 5;
  • FIG. 7 is a schematic structural diagram of a protective device having a plurality of fixed pulleys and movable pulleys in an open state;
  • FIG. 8 is a schematic structural diagram of the pull-down device in FIG. 7;
  • FIG. 9 is a schematic structural diagram of a protective device provided by the second specific embodiment of the application when it is in a closed state
  • FIG. 10 is a schematic structural diagram of the pull-down device in FIG. 9;
  • FIG. 11 is a schematic structural diagram of the second type of protective device when it is in an open state
  • FIG. 12 is a schematic structural diagram of the pull-down device in FIG. 11;
  • FIG. 13 is a schematic structural diagram of a second type of protective device with a plurality of fixed pulleys and movable pulleys in a closed state;
  • FIG. 14 is a schematic structural diagram of the pull-down device in FIG. 13;
  • Figure 15 is a schematic structural diagram of a second type of protective device with a plurality of fixed pulleys and movable pulleys in an open state;
  • FIG. 16 is a schematic structural diagram of the pull-down device in FIG. 15 .
  • 1 is the bracket, 101 is the limiting part, 2 is the cover, 3 is the rotating hinge, 4 is the pull-down device, 401 is the pull rope, 402 is the handle end, 403 is the fixed pulley, 404 is the moving pulley, 405 is the support plate, 406 For the chute, 407 is the push rod, 408 is the spring.
  • FIG. 1 is a schematic structural diagram of a protective device provided by the first specific embodiment of the present application when it is in a closed state
  • FIG. 2 is a structural schematic diagram of the pull-down device in FIG. 1
  • FIG. 4 is a structural schematic diagram of the pull-down device in FIG. 3 .
  • a specific embodiment of the present application provides a protective device, including a bracket 1 and a cover 2, the upper side of the cover 2 and the upper side of the bracket 1 can be hinged through a rotating hinge 3, and a pull-down device 4 is also included.
  • the device 4 includes a fixed pulley 403, a movable pulley 404, a push rod 407 and a pull rope 401.
  • the fixed pulley 403 is fixedly connected to the cover 2
  • the movable pulley 404 is located above the fixed pulley 403
  • the movable pulley 404 is slidably connected to the cover 2
  • the pull rope 401 is fixed
  • the end goes around the movable pulley 404 and is connected with the fixed pulley 403
  • the upper end of the push rod 407 is connected with the movable pulley 404 .
  • the push rod 407 and the movable pulley 404 move downward under the action of gravity, so that the handle end 402 of the pull rope 401 hangs down, so as to facilitate the operator to pull the handle end 402;
  • the cover needs to be closed 2 the handle end 402 is pulled down, the cover 2 moves down, when the lower end of the push rod 407 is in contact with the bracket 1, the pulley 404 is pushed up, and the handle end 402 of the pull rope 401 is moved up, so as to push the pulley 404 up. It plays the role of storing the drawstring 401 .
  • the pull-down device 4 is a purely mechanical structure, and there is no need to use a motor to pull the pull rope 401, so the structure is simple and easy to maintain.
  • the pull-down device 4 further includes a support plate 405 , wherein the support plate 405 is preferably located inside the cover 2 , so after the cover 2 is closed, the pull-down device 4 can be located in the protective device to protect the pull-down device 4 .
  • the support plate 405 is fixedly connected to the inner side wall of the cover 2, for example, by welding or fasteners.
  • the support plate 405 is provided with a chute 406, the fixed pulley 403 is disposed at the bottom of the support plate 405, and the movable pulley 404 is connected to
  • the sliding groove 406 is slidably connected, wherein the support plate 405 is preferably vertically arranged on the strip inside the cover 2, and the sliding groove 406 extends correspondingly along the length direction of the strip.
  • the upper end of the push rod 407 is hinged to the movable pulley 404, that is, the push rod 407 can always be in a vertical state after the cover 2 is opened.
  • the bottom of the bracket 1 is provided with a limiting portion 101 for abutting against the push rod 407 .
  • the upper portion of the limiting portion 101 and the lower end of the push rod 407 are respectively provided with cushion blocks.
  • both ends of the elastic member are respectively connected to the cover member 2 and the movable pulley 404 .
  • the movable pulley 404 moves downward under the combined action of its gravity and the elastic force of the elastic member. move to ensure that the handle end 402 of the pull cord 401 hangs down; when the cover 2 needs to be closed, pull the pull cord 401 downward, the cover 2 moves down, and the elastic piece compresses and deforms after the push rod 407 and the bracket 1 abut, so as to facilitate
  • the elastic member is preferably a spring 408 , the upper end of the spring 408 is connected to the cover member 2 , and the lower end of the spring 408 is connected to the movable pulley 404 .
  • the pull-down device 4 includes a plurality of fixed pulleys 403 and a plurality of movable pulleys 404.
  • the fixed pulleys 403 and the plurality of movable pulleys 404 can improve the ratio of the length of the pull rope 401 to the height of the push rod 407 .
  • the ratio of the length of the pulling rope 401 to the height of the push rod 407 is 4:1.
  • the embodiment of the present application also provides a kind of aerial work equipment, including the protective device provided in any of the above embodiments, the bracket 1 can be a turntable side plate and a turntable tray, and the beneficial effect of the aerial work equipment can refer to the above-mentioned protective device. , and will not be repeated here.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Electric Cable Installation (AREA)
  • Emergency Lowering Means (AREA)

Abstract

一种防护装置及高空作业设备，包括支架（1）和覆盖件（2），覆盖件（2）的上侧与支架（1）的上侧铰接，还包括下拉装置（4），下拉装置（4）包括定滑轮（403）、动滑轮（404）、推杆（407）和拉绳（401），定滑轮（403）与覆盖件（2）固定连接，动滑轮（404）位于定滑轮（403）上方，动滑轮（404）与覆盖件（2）滑动连接，拉绳（401）的固定端绕过动滑轮（404）与定滑轮（403）连接，推杆（407）的上端与动滑轮（404）连接。将覆盖件（2）从支架（1）上开启之后，推杆（407）和动滑轮（404）在重力作用下向下移动，以使拉绳（401）的拉手端（402）垂下，从而便于操作人员拉动拉手端（402）；当需要闭合覆盖件（2）时，向下拉动拉手端（402），推杆（407）的下端与支架（1）相抵后，动滑轮（404）上移，此时会带动拉绳（401）的拉手端（402）上移，以起到收纳拉绳的作用。

Description

一种防护装置及高空作业设备
本申请要求于2020年12月8日提交中国专利局、申请号为202011423985.0、申请名称为“一种防护装置及高空作业设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及工程机械设备领域，特别是涉及一种防护装置，还涉及一种包括上述防护装置的高空作业设备。
背景技术
高空作业设备的动力、液压、电气装置通常设置在一个封闭的防护装置内，以防止碰撞和雨淋，此外也可防止操作人员接触上述装置而受到伤害。
为了方便维护，防护装置的覆盖件通常可以开启和关闭。对于中大型的高空作业设备，覆盖件在开启后，覆盖件的边沿会处在较高的位置，操作者站在地面上很难触摸到覆盖件，需要借助于外物爬到更高的地方才能关闭覆盖件，不仅操作不便，还存在一定的安全隐患。
因此，如何提供一种便于操作者关闭覆盖件的防护装置，是本领域技术人员急需解决的技术问题。
申请内容
本申请的一个目的是提供一种防护装置，可以有效解决覆盖件关闭不便等问题，另一个目的是提供一种包括上述防护装置的高空作业设备。
为解决上述技术问题，本申请提供了如下技术方案：
一种防护装置，包括支架和覆盖件，所述覆盖件的上侧与所述支架的上侧铰接，还包括下拉装置，所述下拉装置包括定滑轮、动滑轮、推杆和 拉绳，所述定滑轮与所述覆盖件固定连接，所述动滑轮位于所述定滑轮上方，所述动滑轮与所述覆盖件滑动连接，所述拉绳的固定端绕过所述动滑轮与所述定滑轮连接，所述推杆的上端与所述动滑轮连接，所述推杆和所述动滑轮在重力作用下，使所述拉绳的拉手端垂下，向下拉动所述拉绳的拉手端，所述覆盖件下移，所述推杆的下端与所述支架相抵后，推动所述动滑轮上移，以带动所述拉绳的拉手端上移。
优选地，所述下拉装置还包括支撑板，所述支撑板与所述覆盖件固定连接，所述支撑板上设有滑槽，所述定滑轮设置在所述支撑板的底部，所述动滑轮与所述滑槽滑动连接。
优选地，所述支撑板固定连接于所述覆盖件的内侧壁上。
优选地，所述推杆的上端与所述动滑轮铰接。
优选地，所述支架底部设有用于与所述推杆相抵的限位部。
优选地，所述限位部上部和所述推杆的下端分别设有垫块。
优选地，还包括弹性件，所述弹性件的两端分别与所述覆盖件和所述动滑轮连接，所述动滑轮在其重力和所述弹性件弹力的作用下向下移动；所述弹性件在所述推杆与所述支架相抵后压缩形变。
优选地，所述弹性件为弹簧，所述弹簧的上端与所述覆盖件连接，所述弹簧的下端与所述动滑轮连接。
优选地，所述下拉装置包括多个所述定滑轮和多个所述动滑轮，所述拉绳依次绕过所述定滑轮和所述动滑轮。
一种高空作业设备，包括上述任一项所述的防护装置。
与现有技术相比，上述技术方案具有以下优点：
本申请所提供的一种防护装置及高空作业设备，包括支架和覆盖件，覆盖件的上侧与支架的上侧铰接，还包括下拉装置，下拉装置包括定滑轮、动滑轮、推杆和拉绳，定滑轮与覆盖件固定连接，动滑轮位于定滑轮上方，动滑轮与覆盖件滑动连接，拉绳的固定端绕过动滑轮与定滑轮连接，推杆的上端与动滑轮连接。将覆盖件从支架上开启之后，推杆和动滑轮在重力 作用下向下移动，以使拉绳的拉手端垂下，从而便于操作人员拉动拉手端；当需要闭合覆盖件时，向下拉动拉手端，覆盖件下移，当推杆的下端与支架相抵后，反推动滑轮上移，此时会带动拉绳的拉手端上移，以起到收纳拉绳的作用。另外下拉装置为纯机械结构，无需通过电机来拉动拉绳，因此结构简单，便于维护。
附图说明
为了更清楚地说明本申请或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请第一种具体实施方式所提供的一种防护装置处于闭合状态时的结构示意图；
图2为图1中的下拉装置的结构示意图；
图3为第一种防护装置处于开启状态时的结构示意图；
图4为图3中的下拉装置的结构示意图；
图5为具有多个定滑轮和动滑轮的一种防护装置处于闭合状态时的结构示意图；
图6为图5中的下拉装置的结构示意图；
图7为具有多个定滑轮和动滑轮的一种防护装置处于开启状态时的结构示意图；
图8为图7中的下拉装置的结构示意图；
图9为本申请第二种具体实施方式所提供的一种防护装置处于闭合状态时的结构示意图；
图10为图9中的下拉装置的结构示意图；
图11为第二种防护装置处于开启状态时的结构示意图；
图12为图11中的下拉装置的结构示意图；
图13为具有多个定滑轮和动滑轮的第二种防护装置处于闭合状态时的结构示意图；
图14为图13中的下拉装置的结构示意图；
图15为具有多个定滑轮和动滑轮的第二种防护装置处于开启状态时的结构示意图；
图16为图15中的下拉装置的结构示意图。
附图标记如下：
1为支架，101为限位部，2为覆盖件，3为旋转铰链，4为下拉装置，401为拉绳，402为拉手端，403为定滑轮，404为动滑轮，405为支撑板，406为滑槽，407为推杆，408为弹簧。
具体实施方式
为了使本申请的上述目的、特征和优点能够更为明显易懂，下面结合附图对本申请的具体实施方式做详细的说明。
在以下描述中阐述了具体细节以便于充分理解本申请。但是本申请能够以多种不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本申请内涵的情况下做类似推广。因此本申请不受下面公开的具体实施方式的限制。
请参考图1～图4，图1为本申请第一种具体实施方式所提供的一种防护装置处于闭合状态时的结构示意图；图2为图1中的下拉装置的结构示意图；图3为第一种防护装置处于开启状态时的结构示意图；图4为图3中的下拉装置的结构示意图。
本申请的一种具体实施方式提供了一种防护装置，包括支架1和覆盖件2，覆盖件2的上侧与支架1的上侧可通过旋转铰链3进行铰接，还包括下拉装置4，下拉装置4包括定滑轮403、动滑轮404、推杆407和拉绳401，定滑轮403与覆盖件2固定连接，动滑轮404位于定滑轮403上方，动滑轮404与覆盖件2滑动连接，拉绳401的固定端绕过动滑轮404与定 滑轮403连接，推杆407的上端与动滑轮404连接。将覆盖件2从支架1上开启之后，推杆407和动滑轮404在重力作用下向下移动，以使拉绳401的拉手端402垂下，从而便于操作人员拉动拉手端402；当需要闭合覆盖件2时，向下拉动拉手端402，覆盖件2下移，当推杆407的下端与支架1相抵后，反推动滑轮404上移，此时会带动拉绳401的拉手端402上移，以起到收纳拉绳401的作用。另外下拉装置4为纯机械结构，无需通过电机来拉动拉绳401，因此结构简单，便于维护。
进一步地，下拉装置4还包括支撑板405，其中支撑板405优选位于覆盖件2的内侧，因此在闭合覆盖件2之后，下拉装置4可以位于防护装置内，以对下拉装置4进行保护。此外支撑板405固定连接于覆盖件2的内侧壁上，例如可通过焊接或者紧固件进行连接，支撑板405上设有滑槽406，定滑轮403设置在支撑板405的底部，动滑轮404与滑槽406滑动连接，其中支撑板405优选竖直设置在覆盖件2内侧的条板，滑槽406相应沿条板的长度方向延伸。
为了便于推杆407带动动滑轮404下移以及推杆407的下端与支架1接触，推杆407的上端与动滑轮404铰接，即推杆407在覆盖件2开启之后，可始终处于竖直状态。
另外为了便于推杆407与支架1接触，支架1底部设有用于与推杆407相抵的限位部101。其次为了提高限位部101对推杆407的支撑能力，限位部101上部和推杆407的下端分别设有垫块。
请参考图9～图12，还包括弹性件，弹性件的两端分别与覆盖件2和动滑轮404连接，当开启覆盖件2之后，动滑轮404在其重力和弹性件弹力的共同作用下向下移动，以保证拉绳401的拉手端402垂下；当需要闭合覆盖件2时，向下拉动拉绳401，覆盖件2下移，弹性件在推杆407与支架1相抵后压缩形变，以便于再次开启覆盖件2时，通过弹性件的弹力作用，推动动滑轮404和推杆407下移。其中，弹性件优选为弹簧408，弹簧408的上端与覆盖件2连接，弹簧408的下端与动滑轮404连接。
请参考图5～图8以及图13～图16，在本实施例中，下拉装置4包括多个定滑轮403和多个动滑轮404，拉绳401依次绕过动滑轮404和定滑轮403，通过多个定滑轮403和多个动滑轮404可提高拉绳401长度与推杆407上升高度比，例如当设有1个定滑轮403和1个动滑轮404时，拉绳401长度与推杆407上升高度比为2:1，例如当设有2个定滑轮403和2个动滑轮404时，拉绳401长度与推杆407上升高度比为4:1。
本申请实施例还提供了一种高空作业设备，包括上述任一项实施例所提供的防护装置，支架1可以为转台侧板及转台托盘，其中高空作业设备的有益效果参考上述防护装置即可，此处不再赘述。
还需要说明的是，在本文中，诸如术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本申请。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本申请的精神或范围的情况下，在其它实施例中实现。因此，本申请将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (10)

  1. 一种防护装置，包括支架(1)和覆盖件(2)，所述覆盖件(2)的上侧与所述支架(1)的上侧铰接，其特征在于，还包括下拉装置(4)，所述下拉装置(4)包括定滑轮(403)、动滑轮(404)、推杆(407)和拉绳(401)，所述定滑轮(403)与所述覆盖件(2)固定连接，所述动滑轮(404)位于所述定滑轮(403)上方，所述动滑轮(404)与所述覆盖件(2)滑动连接，所述拉绳(401)的固定端绕过所述动滑轮(404)与所述定滑轮(403)连接，所述推杆(407)的上端与所述动滑轮(404)连接，所述推杆(407)和所述动滑轮(404)在重力作用下，使所述拉绳(401)的拉手端(402)垂下，向下拉动所述拉绳(401)的拉手端(402)，所述覆盖件(2)下移，所述推杆(407)的下端与所述支架(1)相抵后，推动所述动滑轮(404)上移，以带动所述拉绳(401)的拉手端(402)上移。
  2. 根据权利要求1所述的防护装置，其特征在于，所述下拉装置(4)还包括支撑板(405)，所述支撑板(405)与所述覆盖件(2)固定连接，所述支撑板(405)上设有滑槽(406)，所述定滑轮(403)设置在所述支撑板(405)的底部，所述动滑轮(404)与所述滑槽(406)滑动连接。
  3. 根据权利要求2所述的防护装置，其特征在于，所述支撑板(405)固定连接于所述覆盖件(2)的内侧壁上。
  4. 根据权利要求1所述的防护装置，其特征在于，所述推杆(407)的上端与所述动滑轮(404)铰接。
  5. 根据权利要求1所述的防护装置，其特征在于，所述支架(1)底部设有用于与所述推杆(407)相抵的限位部(101)。
  6. 根据权利要求1所述的防护装置，其特征在于，所述限位部(101)上部和所述推杆(407)的下端分别设有垫块。
  7. 根据权利要求1所述的防护装置，其特征在于，还包括弹性件，所述弹性件的两端分别与所述覆盖件和所述动滑轮连接，所述动滑轮在其重力和所述弹性件弹力的作用下向下移动；所述弹性件在所述推杆与所述支 架相抵后压缩形变。
  8. 根据权利要求7所述的防护装置，其特征在于，所述弹性件为弹簧，所述弹簧的上端与所述覆盖件连接，所述弹簧的下端与所述动滑轮连接。
  9. 根据权利要求1至8任一项所述的防护装置，其特征在于，所述下拉装置(4)包括多个所述定滑轮(403)和多个所述动滑轮(404)，所述拉绳(401)依次绕过所述定滑轮(403)和所述动滑轮(404)。
  10. 一种高空作业设备，其特征在于，包括权利要求1至9任一项所述的防护装置。
PCT/CN2021/135277 2020-12-08 2021-12-03 一种防护装置及高空作业设备 WO2022121791A1 (zh)

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