WO2020124657A1 - 一种加大行程的伸缩装置 - Google Patents

一种加大行程的伸缩装置 Download PDF

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Publication number
WO2020124657A1
WO2020124657A1 PCT/CN2018/124183 CN2018124183W WO2020124657A1 WO 2020124657 A1 WO2020124657 A1 WO 2020124657A1 CN 2018124183 W CN2018124183 W CN 2018124183W WO 2020124657 A1 WO2020124657 A1 WO 2020124657A1
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WO
WIPO (PCT)
Prior art keywords
slide rail
telescopic mechanism
driven
stage
telescopic
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Application number
PCT/CN2018/124183
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English (en)
French (fr)
Inventor
覃文飞
王金鹏
韩笑
张元�
王永锟
Original Assignee
斯坦德机器人（深圳）有限公司
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Publication of WO2020124657A1 publication Critical patent/WO2020124657A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G1/00—Storing articles, individually or in orderly arrangement, in warehouses or magazines
    • B65G1/02—Storage devices
    • B65G1/04—Storage devices mechanical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G25/00—Conveyors comprising a cyclically-moving, e.g. reciprocating, carrier or impeller which is disengaged from the load during the return part of its movement
    • B65G25/04—Conveyors comprising a cyclically-moving, e.g. reciprocating, carrier or impeller which is disengaged from the load during the return part of its movement the carrier or impeller having identical forward and return paths of movement, e.g. reciprocating conveyors
    • B65G25/06—Conveyors comprising a cyclically-moving, e.g. reciprocating, carrier or impeller which is disengaged from the load during the return part of its movement the carrier or impeller having identical forward and return paths of movement, e.g. reciprocating conveyors having carriers, e.g. belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G35/00—Mechanical conveyors not otherwise provided for

Definitions

  • Telescopic device for increasing stroke
  • the present application relates to the field of mobile robots, and more specifically refers to a telescopic device that increases stroke.
  • the purpose of the present application is to overcome the shortcomings of the prior art and provide a telescopic device with increased stroke.
  • a telescopic device with increased stroke includes a fixing mechanism, a first-stage telescopic mechanism slidingly coupled with the fixing mechanism, and a second-level telescopic mechanism slidingly coupled with the first-level telescopic mechanism; the first-level telescopic mechanism is provided with a power mechanism ; The power output end of the power mechanism is drive-coupled with the fixed mechanism so that the first-level telescopic mechanism and the second-level telescopic mechanism have relative movement relative to the fixed mechanism, and the power output end of the power mechanism is drive-coupled with the second-level telescopic mechanism, So that the two-stage telescopic mechanism and the first-stage telescopic mechanism have relative movement.
  • the power mechanism includes a motor, driving a double-sided timing belt coupled to the power output end of the motor.
  • the fixing mechanism includes a fixed slide rail and a fixed synchronous belt provided under the double-sided synchronous belt; the fixed synchronous belt and the double-sided synchronous belt drive coupling to make the primary telescopic mechanism It has relative movement with the fixing mechanism.
  • the first-level telescopic mechanism includes a first-level slide rail; the first-level slide rail is slidingly coupled with the fixed slide rail.
  • the secondary telescopic mechanism includes a secondary slide rail slidingly coupled with the primary slide rail, and a driven synchronous belt located above the double-sided synchronous belt; the driven synchronous belt and the double The transmission connection of the surface synchronous belt makes the two-stage telescopic mechanism move relative to the first-stage telescopic mechanism.
  • the fixed slide rail and the secondary slide rail are located on both sides of the first slide rail; the fixed slide rail and the secondary slide rail are provided with a side facing the first slide rail Chute; both sides of the first-level slide rail are provided with pulleys slidingly coupled with the chute.
  • the outer side of the pulley is provided with a circumferential groove; the inner wall of the chute is provided with a protrusion matching the circumferential groove.
  • the power mechanism further includes an active synchronous wheel provided at the output end of the motor, and a driven synchronous wheel;
  • the double-sided synchronous belt drive is coupled between the active synchronous wheel and the driven synchronous wheel;
  • the driving synchronous wheel is fixedly connected to the first-level slide rail through a driving wheel connecting rod provided;
  • the driven synchronous wheel is fixedly connected to the first-level slide rail through a driving wheel connecting rod provided.
  • the motor is fixedly connected to a driving wheel connecting rod through a motor bracket; a driven wheel bracket is provided between the driven synchronous wheel and the driven wheel connecting rod, and the driven wheel bracket is connected to the driven wheel
  • the position between the levers can be adjusted to control the tension of the double-sided timing belt.
  • the first-stage telescopic mechanism and the second-stage telescopic mechanism are arranged symmetrically, and two first-level slide rails are connected by a driving wheel connecting rod and a driven wheel connecting rod; the second-level sliding rail is provided There is a cover plate; the driven timing belt is provided under the cover plate and is engaged with the double-sided timing belt.
  • the beneficial effects of the present application are as follows: the telescopic device of the present application can achieve telescoping on both sides, a large stretching stroke, and a simple structure; when performing a telescopic movement, the motion stability is good and the controllability is strong.
  • FIG. 1 is a perspective view of a telescopic device for increasing stroke according to the present application
  • FIG. 2 is a plan view of a telescopic device with increased stroke according to the present application
  • FIG. 3 is a front view and a partially enlarged view of a telescopic device with increased stroke according to the present application
  • FIG. 4 is a left side view and a partially enlarged view of a telescopic device with increased stroke according to the present application;
  • FIG. 5 is a perspective view of a telescopic device of the present application with a cover plate removed without a cover.
  • FIGS 1 to 5 are drawings of embodiments of the present application.
  • a telescopic device for increasing stroke includes a fixing mechanism 10, a first-stage telescopic mechanism 20 slidingly coupled with the fixing mechanism 10, and a second-stage telescopic mechanism 30 slidingly coupled with the first-stage telescopic mechanism 20.
  • the first-level telescopic mechanism 20 is provided with a power mechanism 40.
  • the power output end of the power mechanism 40 is drive-coupled with the fixing mechanism 10 so that the first-stage telescopic mechanism 20 and the second-stage telescopic mechanism 30 have relative movement with respect to the fixing mechanism 10, and the power output end of the power mechanism 40 and the second-stage telescopic mechanism 30 Drive coupling, so that the two-stage telescopic mechanism 30 and the first-stage telescopic mechanism 20 have relative movement.
  • the device can be telescopic on the left and right sides, and the telescopic stroke can reach more than twice the length of the telescopic device itself.
  • the power mechanism 40 includes a motor 41 (or a pneumatic motor), driving a double-sided timing belt 42 coupled to the power output end of the motor 41.
  • the steering of the motor 41 is controlled, so that the direction of movement of the double-sided timing belt 42 is changed, so that the first-stage telescopic mechanism 20 and the second-stage telescopic mechanism 30 can move to one side or both sides at the same time, that is, they can expand and contract on both sides.
  • the fixing mechanism 10 includes a fixed sliding rail 11 and a fixed timing belt 12 provided below the double-sided timing belt 42.
  • the transmission belt of the fixed synchronization belt 12 and the double-sided timing belt 42 are connected so that the first-stage telescopic mechanism 20 and the fixed mechanism 10 have relative movement.
  • the fixed slide rail 11 and the fixed synchronous belt 12 are fixed on the equipment installed with the telescopic device.
  • the fixed timing belt 12 and the double-sided timing belt 42 are engaged by toothed protrusions provided on the outside to transmit power.
  • the fixed timing belt 12 is fixed, and when the double-sided timing belt 42 is powered, the primary telescopic mechanism 20 will move.
  • the first-level telescopic mechanism 20 includes a first-level slide rail 21, and the first-level slide rail 21 is slidingly coupled with the fixed slide rail 11
  • the two-stage telescopic mechanism 30 includes a two-stage slide rail 31 slidingly coupled with the first-stage slide rail 21, and a driven synchronous belt 32 located above the double-sided synchronous belt 42.
  • the driven timing belt 32 is coupled to the double-sided timing belt 42 so that the secondary telescopic mechanism 30 and the primary telescopic mechanism 20 have relative movement.
  • the secondary telescopic mechanism 30 further includes a cover plate 33 disposed on the secondary slide rail 31.
  • the driven timing belt 32 is disposed below the cover plate 33, and the driven timing belt 32 is drive-coupled with the double-sided timing belt 42 through a toothed protrusion on the surface, so that the double-sided timing belt 42 drives the secondary telescopic mechanism 30 to move.
  • the fixed slide rail 11 and the secondary slide rail 31 are located on both sides of the primary slide rail 21, respectively.
  • the side of the fixed slide rail 11 and the second-level slide rail 31 facing the first-level slide rail 21 are provided with slide grooves 111 (311).
  • Both sides of the primary slide rail 21 are provided with pulleys 211 slidingly connected with the slide grooves 111 (311), so that the fixed slide rail 11, the secondary slide rail 31 and the primary slide rail 21 slide more smoothly, and at the same time, Time, has a guiding role.
  • a circumferential groove 2111 is provided on the outside of the pulley 211.
  • the inner wall of the sliding groove 111 (311) is provided with a convex portion 1111 matching the circumferential groove 2111.
  • the circumferential groove 2111 rolls in the convex portion 1111, which makes the guide direction strong and the motion stability good, and also prevents swinging to both sides during the movement.
  • the power mechanism 40 further includes an active synchronizing wheel 43 provided at the output end of the motor 41, and a driven synchronizing wheel 44.
  • the double-sided timing belt 42 is drivingly coupled between the driving timing wheel 43 and the driven timing wheel 44.
  • the driving synchronizing wheel 43 is fixedly connected to the first-level slide rail 21 through a driving wheel connecting rod 45 provided.
  • the driven synchronous wheel 44 is fixedly coupled to the first-stage slide rail 21 through the provided driven wheel connecting rod 46.
  • the motor 41 is fixedly coupled to the driving wheel connecting rod 45 via a motor bracket 47.
  • a driven wheel bracket 48 is provided between the driven synchronous wheel 44 and the driven wheel connecting rod 46, and the position between the driven wheel bracket 48 and the driven wheel connecting rod 46 can be adjusted to control the tension of the double-sided synchronous belt 42.
  • the driven wheel bracket 48 is provided with a bar-shaped groove, and is fixed to the driven wheel connecting rod 46 by bolts.
  • the first-stage telescopic mechanism 20 and the second-stage telescopic mechanism 30 are arranged symmetrically, and two first-level slide rails 21 are connected through a driving wheel connecting rod 45 and a driven wheel connecting rod 46.
  • the cover plate 33 is connected between the two secondary slide rails 31, so that the output cover plate 33, which is the telescopic movement of the entire device, moves smoothly.
  • a speed reducer 49 is provided between the motor 41 and the active synchronous wheel 43. After the speed of the motor 41 is reduced by the speed reducer 49, it reaches the driving synchronous wheel 43.
  • the motor 41 rotates and decelerates through the reducer 49 to reach the active synchronous wheel 43; and then drives the double-sided synchronous belt 42 movement, the motor 41 is converted into a rotary motion of the double-sided synchronous belt 42 straight line movement.
  • the outer surface of the double-sided timing belt 42 is provided with toothed protrusions, and the fixed timing belt 12 and the driven timing belt 32 are also provided with toothed protrusions on the outer surface, so the double-sided timing belt 42 and the fixed timing belt 12, driven The timing belt 32 transmits power through toothed protrusions.
  • the fixed timing belt 12 is disposed below the double-sided timing belt 42.
  • the first-stage telescopic mechanism 20 and the second-stage telescopic mechanism 30 are driven to move relative to the fixed mechanism 10; the driven synchronous belt 32 is disposed on both sides Above the synchronous belt 42, when the double-sided synchronous belt 42 moves, the secondary telescopic mechanism 30 is driven relative to the primary telescopic mechanism 20, and the primary telescopic mechanism 20 and the secondary The telescopic movement of the telescopic mechanism 30.
  • the direction in which the motor 41 rotates the movement direction of the first-stage telescopic mechanism 20 and the second-stage telescopic mechanism 30 relative to the fixed mechanism 10 can be controlled.
  • the telescopic device of the present application can achieve telescoping on both sides, with a large telescopic stroke and a simple structure; when performing a telescopic motion, the motion stability is good and the controllability is strong.

Abstract

一种加大行程的伸缩装置，包括固定机构（10），与固定机构（10）滑动联接的一级伸缩机构（20），与一级伸缩机构（20）滑动联接的二级伸缩机构（30）；一级伸缩机构（20）设有动力机构（40）；动力机构（40）的动力输出端与固定机构（10）传动联接，以使一级伸缩机构（20）、二级伸缩机构（30）相对于固定机构（10）具有相对移动，动力机构（40）的动力输出端与二级伸缩机构（30）传动联接，以使二级伸缩机构（30）与一级伸缩机构（20）具有相对移动。

Description

一种加大行程的伸缩装置
[0001] 本申请是以申请号为 201811573073.4、 申请日为 2018年 12月 21日的中国专利申 请为基础， 并主张其优先权， 该申请的全部内容在此作为整体引入本申请中。
[0002] 技术领域
[0003] 本申请涉及移动机器人领域， 更具体地说是指一种加大行程的伸缩装置。
[0004] 背景技术
[0005] 在 AGV或穿梭车领域中， 在双侧两级伸缩机构上， 5见有机构只能实现最大 1倍 的总伸缩量， 或者只能在单侧两级伸缩机构上实现 1倍机构总伸缩量。 在超过 1 倍机构总长行程时， 需要增加到三级伸缩机构， 结构更加复杂， 成本也增加。 除了上述伸缩量的问题， 设置在 AGV或穿梭车的伸缩机构稳定性不够， 不好控 制双侧伸缩， 结构复杂。
[0006] 申请内容
[0007] 本申请的目的在于克服现有技术的缺陷， 提供一种加大行程的伸缩装置。
[0008] 为实现上述目的， 本申请采用以下技术方案：
[0009] 一种加大行程的伸缩装置， 包括固定机构， 与固定机构滑动联接的一级伸缩机 构， 与一级伸缩机构滑动联接的二级伸缩机构； 所述一级伸缩机构设有动力机 构； 所述动力机构的动力输出端与固定机构传动联接， 以使一级伸缩机构、 二 级伸缩机构相对于固定机构具有相对移动， 所述动力机构的动力输出端与二级 伸缩机构传动联接， 以使二级伸缩机构与一级伸缩机构具有相对移动。
[0010] 其进一步技术方案为： 所述动力机构包括电机， 传动联接于电机动力输出端的 双面同步带。
[0011] 其进一步技术方案为： 所述固定机构包括固定滑轨及设于双面同步带下方的固 定同步带； 所述固定同步带与双面同步带的传动联接， 以使一级伸缩机构与固 定机构具有相对移动。
[0012] 其进一步技术方案为： 所述一级伸缩机构包括一级滑轨； 所述一级滑轨与固定 滑轨滑动联接。 [0013] 其进一步技术方案为： 所述二级伸缩机构包括与一级滑轨滑动联接的二级滑轨 ， 及位于双面同步带上方的从动同步带； 所述从动同步带与双面同步带的传动 联接， 以使二级伸缩机构与一级伸缩机构具有相对移动。
[0014] 其进一步技术方案为： 所述固定滑轨、 二级滑轨分别位于一级滑轨的两侧； 所 述固定滑轨、 二级滑轨朝向一级滑轨的一侧均设有滑槽； 所述一级滑轨两侧均 设有与滑槽滑动联接的滑轮。
[0015] 其进一步技术方案为： 所述滑轮外侧设有环向凹槽； 所述滑槽内壁设有与环向 凹槽匹配的凸起部。
[0016] 其进一步技术方案为： 所述动力机构还包括设置于电机输出端的主动同步轮， 及从动同步轮； 所述双面同步带传动联接于主动同步轮与从动同步轮之间； 所 述主动同步轮通过设有的驱动轮连接杆与一级滑轨固定联接； 所述从动同步轮 通过设有的从动轮连接杆与一级滑轨固定联接。
[0017] 其进一步技术方案为： 所述电机通过电机支架固定联接于驱动轮连接杆； 所述 从动同步轮与从动轮连接杆之间设有从动轮支架， 且从动轮支架与从动轮连接 杆之间位置可调节， 以控制双面同步带的张紧度。
[0018] 其进一步技术方案为： 所述一级伸缩机构、 二级伸缩机构对称设置， 并通过驱 动轮连接杆、 从动轮连接杆联接二个一级滑轨； 所述二级滑轨上设置有盖板； 所述从动同步带设于盖板下方， 且与双面同步带啮合。
[0019] 本申请与现有技术相比的有益效果是： 本申请伸缩装置可以实现两侧伸缩， 伸 缩行程大， 结构简单； 在进行伸缩运动时， 运动稳定性好， 可控性强。
[0020] 下面结合附图和具体实施例对本申请作进一步描述。
[0021] 附图说明
[0022] 图 1为本申请一种加大行程的伸缩装置的立体图；
[0023] 图 2为本申请一种加大行程的伸缩装置的俯视图；
[0024] 图 3为本申请一种加大行程的伸缩装置的前视图及局部放大图；
[0025] 图 4为本申请一种加大行程的伸缩装置的左视图及局部放大图；
[0026] 图 5为本申请一种加大行程的伸缩装置的去掉盖板的立体图。
[0027] 具体实施方式 [0028] 为了更充分理解本申请的技术内容， 下面结合具体实施例对本申请的技术方案 进一步介绍和说明， 但不局限于此。
[0029] 如图 1至图 5本申请实施例的图纸。
[0030] 一种加大行程的伸缩装置， 包括固定机构 10， 与固定机构 10滑动联接的一级伸 缩机构 20， 与一级伸缩机构 20滑动联接的二级伸缩机构 30。 一级伸缩机构 20设 有动力机构 40。 动力机构 40的动力输出端与固定机构 10传动联接， 以使一级伸 缩机构 20、 二级伸缩机构 30相对于固定机构 10具有相对移动， 所述动力机构 40 的动力输出端与二级伸缩机构 30传动联接， 以使二级伸缩机构 30与一级伸缩机 构 20具有相对移动。 本装置可以实现左右两侧伸缩， 伸缩行程可以达到伸缩装 置自身长度 2倍以上。
[0031] 所述动力机构 40包括电机 41 （或气动马达） ， 传动联接于电机 41动力输出端的 双面同步带 42。 控制电机 41的转向， 使得双面同步带 42的运动方向改变， 进而 使得一级伸缩机构 20、 二级伸缩机构 30能同时往一侧或两侧运动， 即能在两侧 进行伸缩。
[0032] 固定机构 10包括固定滑轨 11及设于双面同步带 42下方的固定同步带 12。 固定同 步带 12与双面同步带 42的传动联接， 以使一级伸缩机构 20与固定机构 10具有相 对移动。 固定滑轨 11、 固定同步带 12均固定在安装伸缩装置的设备上。 优选的 ， 固定同步带 12与双面同步带 42通过外侧设置的齿状凸起的啮合来传递动力。 固定同步带 12固定不动， 当双面同步带 42得到动力运动时， 一级伸缩机构 20就 会移动。
[0033] 其中， 一级伸缩机构 20包括一级滑轨 21， 且一级滑轨 21与固定滑轨 11滑动联接
[0034] 二级伸缩机构 30包括与一级滑轨 21滑动联接的二级滑轨 31， 及位于双面同步带 42上方的从动同步带 32。 从动同步带 32与双面同步带 42的传动联接， 以使二级 伸缩机构 30与一级伸缩机构 20具有相对移动。
[0035] 优选的， 二级伸缩机构 30还包括设置在二级滑轨 31上的盖板 33。 从动同步带 32 设置在盖板 33下方， 并且从动同步带 32通过表面的齿状凸起与双面同步带 42传 动联接， 以使双面同步带 42带动二级伸缩机构 30运动。 [0036] 其中， 固定滑轨 11、 二级滑轨 31分别位于一级滑轨 21的两侧。 固定滑轨 11、 二 级滑轨 31朝向一级滑轨 21的一侧均设有滑槽 111 (311) 。 一级滑轨 21两侧均设 有与滑槽 111 (311) 滑动联接的滑轮 211， 从而使得固定滑轨 11、 二级滑轨 31与 一级滑轨 21滑动得更加流畅， 同时， 在滑动时， 具有导向的作用。
[0037] 优选的， 滑轮 211外侧设有环向凹槽 2111。 滑槽 111 (311) 内壁设有与环向凹 槽 2111匹配的凸起部 1111。 环向凹槽 2111在凸起部 1111内滚动， 使得导向性强 、 运动稳定性好， 还防止运动时产生往两侧的摆动情况。
[0038] 动力机构 40还包括设置于电机 41输出端的主动同步轮 43， 及从动同步轮 44。 双 面同步带 42传动联接于主动同步轮 43与从动同步轮 44之间。 主动同步轮 43通过 设有的驱动轮连接杆 45与一级滑轨 21固定联接。 从动同步轮 44通过设有的从动 轮连接杆 46与一级滑轨 21固定联接。
[0039] 电机 41通过电机支架 47固定联接于驱动轮连接杆 45。 从动同步轮 44与从动轮连 接杆 46之间设有从动轮支架 48 , 且从动轮支架 48与从动轮连接杆 46之间位置可 调节， 以控制双面同步带 42的张紧度。
[0040] 具体的， 从动轮支架 48设有条形槽， 并且通过螺栓与动轮连接杆 46固定。
[0041] 一级伸缩机构 20、 二级伸缩机构 30对称设置， 并通过驱动轮连接杆 45、 从动轮 连接杆 46联接二个一级滑轨 21。 盖板 33联接在二个二级滑轨 31之间， 使得作为 整个装置的伸缩运动的输出端盖板 33运动平稳。
[0042] 优选的， 电机 41与主动同步轮 43之间设有减速机 49。 电机 41的转速通过减速机 49的减速后， 到达主动同步轮 43。
[0043] 本装置的工作过程： 电机 41转动， 并通过减速机 49减速后到达主动同步轮 43 ; 然后带动双面同步带 42运动， 将电机 41的旋转运动转化成双面同步带 42的直线 运动。 双面同步带 42外表面设有齿状凸起， 并且固定同步带 12、 从动同步带 32 外表面也设有的齿状凸起， 所以双面同步带 42与固定同步带 12、 从动同步带 32 之间通过齿状凸起传动动力。 固定同步带 12设置在双面同步带 42下方， 双面同 步带 42运动时， 从而带动一级伸缩机构 20和二级伸缩机构 30相对于固定机构 10 运动； 从动同步带 32设置在双面同步带 42上方， 双面同步带 42运动时， 从而带 动二级伸缩机构 30相对于一级伸缩机构 20运动， 实现了一级伸缩机构 20和二级 伸缩机构 30的伸缩运动。 其中， 控制电机 41转动的方向， 就能控制一级伸缩机 构 20、 二级伸缩机构 30相对于固定机构 10的运动方向。
[0044] 综上所述， 本申请伸缩装置可以实现两侧伸缩， 伸缩行程大， 结构简单； 在进 行伸缩运动时， 运动稳定性好， 可控性强。
[0045] 上述仅以实施例来进一步说明本申请的技术内容， 以便于读者更容易理解， 但 不代表本申请的实施方式仅限于此， 任何依本申请所做的技术延伸或再创造， 均受本申请的保护。 本申请的保护范围以权利要求书为准。
发明概述
技术问题
问题的解决方案
发明的有益效果

Claims

权利要求书
[权利要求 1] 一种加大行程的伸缩装置， 其特征在于， 包括固定机构， 与固定机构 滑动联接的一级伸缩机构， 与一级伸缩机构滑动联接的二级伸缩机构 ； 所述一级伸缩机构设有动力机构； 所述动力机构的动力输出端与固 定机构传动联接， 以使一级伸缩机构、 二级伸缩机构相对于固定机构 具有相对移动， 所述动力机构的动力输出端与二级伸缩机构传动联接 ， 以使二级伸缩机构与一级伸缩机构具有相对移动。
[权利要求 2] 根据权利要求 1所述的一种加大行程的伸缩装置， 其特征在于， 所述 动力机构包括电机， 传动联接于电机动力输出端的双面同步带。
[权利要求 3] 根据权利要求 2所述的一种加大行程的伸缩装置， 其特征在于， 所述 固定机构包括固定滑轨及设于双面同步带下方的固定同步带； 所述固 定同步带与双面同步带的传动联接， 以使一级伸缩机构与固定机构具 有相对移动。
[权利要求 4] 根据权利要求 3所述的一种加大行程的伸缩装置， 其特征在于， 所述 一级伸缩机构包括一级滑轨； 所述一级滑轨与固定滑轨滑动联接。
[权利要求 5] 根据权利要求 4所述的一种加大行程的伸缩装置， 其特征在于， 所述 二级伸缩机构包括与一级滑轨滑动联接的二级滑轨， 及位于双面同步 带上方的从动同步带； 所述从动同步带与双面同步带的传动联接， 以 使二级伸缩机构与一级伸缩机构具有相对移动。
[权利要求 6] 根据权利要求 5所述的一种加大行程的伸缩装置， 其特征在于， 所述 固定滑轨、 二级滑轨分别位于一级滑轨的两侧； 所述固定滑轨、 二级 滑轨朝向一级滑轨的一侧均设有滑槽； 所述一级滑轨两侧均设有与滑 槽滑动联接的滑轮。
[权利要求 7] 根据权利要求 6所述的一种加大行程的伸缩装置， 其特征在于， 所述 滑轮外侧设有环向凹槽； 所述滑槽内壁设有与环向凹槽匹配的凸起部
[权利要求 8] 根据权利要求 5所述的一种加大行程的伸缩装置， 其特征在于， 所述 动力机构还包括设置于电机输出端的主动同步轮， 及从动同步轮； 所 述双面同步带传动联接于主动同步轮与从动同步轮之间； 所述主动同 步轮通过设有的驱动轮连接杆与一级滑轨固定联接； 所述从动同步轮 通过设有的从动轮连接杆与一级滑轨固定联接。
[权利要求 9] 根据权利要求 8所述的一种加大行程的伸缩装置， 其特征在于， 所述 电机通过电机支架固定联接于驱动轮连接杆； 所述从动同步轮与从动 轮连接杆之间设有从动轮支架， 且从动轮支架与从动轮连接杆之间位 置可调节， 以控制双面同步带的张紧度。
[权利要求 10] 根据权利要求 8所述的一种加大行程的伸缩装置， 其特征在于， 所述 一级伸缩机构、 二级伸缩机构对称设置， 并通过驱动轮连接杆、 从动 轮连接杆联接二个一级滑轨； 所述二级滑轨上设置有盖板； 所述从动 同步带设于盖板下方， 且与双面同步带啮合。
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