WO2010012198A1 - 扭簧转动机构及安防云台 - Google Patents

扭簧转动机构及安防云台 Download PDF

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Publication number
WO2010012198A1
WO2010012198A1 PCT/CN2009/072819 CN2009072819W WO2010012198A1 WO 2010012198 A1 WO2010012198 A1 WO 2010012198A1 CN 2009072819 W CN2009072819 W CN 2009072819W WO 2010012198 A1 WO2010012198 A1 WO 2010012198A1
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WO
WIPO (PCT)
Prior art keywords
torsion spring
limiting member
driven shaft
sleeve
fixed
Prior art date
Application number
PCT/CN2009/072819
Other languages
English (en)
French (fr)
Inventor
伍志坚
Original Assignee
深圳市艾立克电子有限公司
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 深圳市艾立克电子有限公司 filed Critical 深圳市艾立克电子有限公司
Publication of WO2010012198A1 publication Critical patent/WO2010012198A1/zh

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/56—Accessories
    • G03B17/561—Support related camera accessories
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G1/00—Spring motors
    • F03G1/02—Spring motors characterised by shape or material of spring, e.g. helical, spiral, coil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/02—Heads
    • F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
    • F16M11/06—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
    • F16M11/10—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting around a horizontal axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M2200/00—Details of stands or supports
    • F16M2200/04—Balancing means
    • F16M2200/041—Balancing means for balancing rotational movement of the head

Definitions

  • the present invention relates to a rotating structure and a security pan/tilt structure, and more particularly to a torsion spring rotating mechanism and a security head mounted using the same.
  • Torsion springs as energy storage components, are widely used in various industries such as electronics and machinery. In some rotating mechanisms, the torsion spring is also used as an energy storage reset element. For example, in the security industry, a torsion spring is applied to the pan/tilt to provide energy for the reset of the driven shaft.
  • FIG. 1 it is a schematic structural view of an existing security head, including a main bracket 901, a forward/reverse motor 902 is mounted on a lower portion of the main bracket 901, and a driven shaft is mounted on an upper portion of the main bracket 901. 903.
  • the positive and negative motor 902 drives the driven shaft 903 to rotate by the pulley set.
  • a camera assembly is disposed on the top of the main bracket 901, and the camera assembly is fixedly mounted on the driven shaft 903, and is driven to rotate by the driven shaft 903.
  • a section of the driven shaft 903 projects to the outside of the main bracket 901 for mounting the torsion spring 905 assembly.
  • the output shaft section 903 projecting from the cylindrical sleeve is provided with a torsion spring 904 mounted in the torsion spring 904 mounted on the cylindrical sleeve is provided with a torsion spring 905; and, at the end of the driven shaft projecting section 903, a screw
  • the 906 is fixedly mounted with a torsion spring stop 907.
  • a socket 908 is respectively disposed on the outer wall of the torsion spring stop 907 and the main bracket 901, and the two ends of the torsion spring 905 are respectively inserted into the torsion spring block 902 and the insertion hole 908 of the main bracket 901.
  • the torsion spring 905 in the figure is a left-handed torsion spring 905, and when the motor 902 drives the driven shaft 903 to make a smooth rotation.
  • the torsion spring stop 907 also performs a smooth needle movement. Since one end of the torsion spring 905 is fixed on the main bracket 901, the torsion spring stop block 907 drives the other end of the torsion spring 905 to perform a smooth needle movement, thereby compressing.
  • the torsion spring 905 generates elastic potential energy for use; the torsion spring 905 of this crucible is compressed, which can be deformed by elasticity and has a long service life.
  • the torsion spring stop 907 also performs the reverse needle movement. Since one end of the torsion spring 905 is fixed on the main bracket 901, the twisted spring file Block 907 drives the other end of the torsion spring 905 to perform a reverse needle movement, and the compression torsion spring 905 generates elastic potential energy for use; the torsion spring 90 5 is stretched (ie, has the torsion spring 905 pulled apart). Trend), its available elastic deformation is small, so A defect that results in a short service life.
  • the technical problem to be solved by the present invention is that the above-described torsion spring rotating mechanism of the prior art always has the drawback of being stretched, and provides a torsion spring rotating mechanism that causes the torsion spring to always operate in a compressed state.
  • the technical solution adopted by the present invention to solve the technical problem thereof is: providing a torsion spring rotating mechanism, comprising: a bracket, a rotating shaft mounted on the bracket and rotatable in a forward or reverse direction;
  • the peripheral sleeve is provided with a torsion spring, and the torsion spring comprises a first end and a second end which are separately disposed;
  • the bracket is fixedly provided with a fixed limiting member for limiting the first end and the second end of the torsion spring;
  • the movement limiting member is fixedly disposed on the rotating shaft, and the movement limiting member rotates the rotating shaft to rotate the first end of the torsion spring, and the fixing limiting member limits the a second end of the torsion spring cooperates to compress the torsion spring, and the movement limiting member rotates in a reverse direction of the rotating shaft to press the second end of the torsion spring, and the fixing limiting member limits the The first end of the torsion spring cooperates to compress the torsion spring.
  • the fixed limiting member is an open circular sleeve fixing limiting block, and both sides of the opening of the sleeve fixing limiting block and the torsion spring The positions of the first end and the second end correspond to each other.
  • the motion limiting member is a circular sleeve motion limiting block having an opening nested with the sleeve fixing limiting block, and the sleeve movement limit The side edges of the opening of the block correspond to the positions of the first end and the second end of the torsion spring.
  • the side edges of the opening of the sleeve movement restricting block are provided with bayonet at positions corresponding to the first end and the second end.
  • the torsion spring is a left-hand torsion spring or a right-hand torsion spring; the fixed limiting member and the motion limiting member are both disposed on an upper side of the rotating shaft or Lower side.
  • the rotating shaft is sleeved with a torsion spring mounting cylinder; and the torsion spring sleeve is mounted on the periphery of the torsion spring mounting cylinder.
  • a security platform including a main bracket, a driven shaft mounted on the main bracket and rotatable in a forward or reverse direction, and a camera assembly fixedly mounted on the driven shaft; a peripheral portion of the driven shaft is provided with a torsion spring, the torsion spring comprising a first end and a second end separately provided;
  • the main bracket is fixedly provided with a fixed limit member for limiting the first end and the second end of the torsion spring;
  • the driven shaft is fixedly provided with a motion limiting member, The movement limiting member rotates the first end of the torsion spring in a forward rotation of the driven shaft, and the fixed limiting member limits the second end of the torsion spring to cooperate to compress the torsion spring. And the movement limiting member rotates the second end of the torsion spring in a reverse rotation of the driven shaft, and the fixed limiting member limits the first end of the torsion spring to cooperate to compress the twist Spring.
  • the upper portion of the main bracket is provided with a "U"-shaped mounting position for mounting the camera assembly, and the driven shaft extends from the main bracket to form an extended portion;
  • the torsion spring is mounted on the protruding portion of the driven shaft, and the positions of the fixed limiting member and the motion limiting member correspond to the torsion spring.
  • the fixed limiting member is an open circular sleeve fixing limiting block, and the two sides of the opening of the sleeve fixing limiting block and the torsion spring are The position of the one end is corresponding to the position of the second end;
  • the movement limiting member is a circular sleeve movement limiting block having an opening nested with the sleeve fixing limiting block, and the sleeve movement limiting block is The side edges of the opening correspond to the positions of the first end and the second end of the torsion spring.
  • the torsion spring is a left-hand torsion spring or a right-hand torsion spring; the fixed limiting member and the motion limiting member are both disposed on an upper side or a lower side of the rotating shaft .
  • the present invention has the following beneficial effects: the first end and the second end of the torsion spring are respectively pressed by the motion limiting member in the forward and reverse rotations of the rotating shaft (the driven shaft), so that the torsion spring is always in the
  • the state of compression means that the torsion spring always moves within its maximum allowable elastic deformation range, so that it can be elastically deformed greatly, increasing the service life of the torsion spring and reducing the possibility of the torsion spring breaking.
  • FIG. 1 is a schematic exploded view of a prior art security pan/tilt
  • FIG. 2 is a schematic exploded view of a specific embodiment of the security head of the present invention.
  • Figure 3 is a side elevational view showing an assembled embodiment of the security head of the present invention.
  • FIG. 4 is a front elevational view showing an assembled embodiment of the security head of the present invention.
  • Figure 5 is a perspective view of a torsion spring of a specific embodiment of the security head of the present invention.
  • FIG. 2 to FIG. 5 it is a specific embodiment of the security pan/tilt of the torsion spring 17 of the present invention. It can be understood that the torsion spring 17 rotation mechanism can also be applied to other rotating mechanisms. As an energy storage component, it is necessary to provide the energy of rotation. The following is an example of its application to the security platform.
  • the security platform includes a main bracket 11 (bracket), a driven shaft 12 (rotation shaft) mounted on the main bracket 11, a camera assembly fixed to the driven shaft 12, and the like.
  • the lower portion of the main support 11 of the security head is also equipped with a forward and reverse motor 13, and the driven shaft 12 is mounted on the upper portion of the main support 11, and the forward and reverse motor 13 is driven by the pulley set 14
  • the moving shaft 12 rotates in the forward or reverse direction.
  • a "U" shaped slot is provided at the top of the main bracket 11 for mounting the camera assembly.
  • the camera assembly includes a mount 15 and a camera (not shown) fixedly mounted to the mount 15.
  • the mounting base 15 is fixedly coupled to the driven shaft 12, and is driven to rotate by the driven shaft 12 to drive the camera to rotate at a certain angle.
  • the main bracket 11 is provided with a mounting hole, and the driven shaft 12 is mounted on the mounting hole through the bearing 16.
  • the pulley set 14 is disposed on one side of the main bracket 11 to drive the driven shaft 12 to rotate; and the other end of the driven shaft 12 extends from the main bracket 11 to form an extended section.
  • a torsion spring 17 is fitted over the extension section, and the torsion spring 17 can be mounted on the extension section by a torsion spring mounting cylinder.
  • the torsion spring mounting cylinder can be used to support the torsion spring 17 by using a plastic cylinder, a rubber cylinder or the like.
  • the torsion spring 17 includes a first end 171 and a second end 172 which are separately disposed.
  • first end 171 and the second end 172 are symmetrically distributed on the axis of the torsion spring 17 Side, thus facilitating the operation of the motion limiter.
  • first end 171 and the second end 172 can also be designed to have a certain angle.
  • a fixing stopper 19 is fixed to the outer wall of the main bracket 11, and the first end 171 and the second end of the same torsion spring 17 are End 172.
  • the fixed limiting member 19 is a circular sleeve fixing limiting block, and an opening is provided on the fixed limiting block, and the first end 171 of the torsion spring 17 is restricted by the two side edges of the opening and Second end 172.
  • the movable limiting member 20 is fixedly mounted at the end of the driven shaft 12, and the movable limiting member 20 rotates in the forward or reverse direction with the driven shaft 12, thereby pushing the first end 171 of the torsion spring 17 or the first Two ends 172.
  • the motion limiting member is a segmented circular sleeve motion limiting block nested with the sleeve fixing limiting block, the two sides of the motion limiting block and the torsion spring 17 The positions of the first end 171 and the second end 172 correspond.
  • the two sides of the opening of the motion limiting block are provided with a bayonet 201 at a position corresponding to the first end 171 and the second end 172, so that when the motion limiting block is rotated, The first end 171 or the second end 172 of the torsion spring 17 is snapped into the bayonet 201 so that the torsion spring 17 does not arbitrarily slide, shift, or the like.
  • the front end of the movable limiting block is provided with a connecting portion 202, and the connecting portion 202 is provided with a connecting hole 203.
  • the cross-sectional shape of the end of the driven shaft 12 is square or waist-shaped, and the cross-sectional shape of the corresponding connecting hole 203 is also square or waist-shaped.
  • the movable limiting block is inserted into the end of the driven shaft 12 through the connecting hole 203, and is locked by the screw 21 and the spacer 22, thereby fixedly connecting the movable limiting block to the driven shaft 12, and the driven shaft 12 drives the rotation.
  • the fixed connection between the movable stop block and the driven shaft 12 can also be by various means available.
  • the fixed limiting member 19 and the motion limiting member may also adopt other mechanical forms, such as but not limited to: the fixed limiting member 19 uses two separate first ends 171 and the same with the torsion spring 17 The second end 172 corresponds to the limiting block; and the movable limiting member 20 can also use two separate sliding levers fixed on the driven shaft 12 to respectively respectively move the first end 171 and the first end of the torsion spring 17 Two ends 172.
  • the torsion spring 17 of the present embodiment uses a left-handed torsion spring.
  • the torsion spring 17 is always in a compressed state, the fixed limiting member 19 and the movement.
  • the limiting members are all disposed on the upper side of the driven shaft 12. It can be understood that when the torsion spring 17 can also use a right-handed torsion spring.
  • the fixed stopper 19 and the motion limiting member may also be disposed on the lower side of the driven shaft 12.
  • the invention has the advantages of simple structure and convenient installation, and skillfully uses the motion limiting member to press the torsion spring 17 during the reciprocating motion, and can generate the required elastic potential energy in both the forward and reverse directions, and the spring can always It moves within the range of allowable elastic denaturation, so that the elastic deformation can be made larger, and the service life of the spring is increased, reducing the possibility of spring breakage.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Springs (AREA)
  • Accessories Of Cameras (AREA)

Description

技术领域
本发明涉及转动结构以及安防云台结构， 更具体地说， 涉及一种扭簧转动机构 以及应用该结构的安防云台。
背景技术
[2] 扭簧作为储能元件， 被广泛的应用到电子、 机械等各个行业中。 在一些转动机 构中， 扭簧也会被用作储能复位元件， 例如在安防行业中， 扭簧被应用到云台 中， 为从动轴的复位提供能量。
[3] 如图 1所示， 是现有的安防云台的结构示意图， 包括主支架 901， 在主支架 901 的下部安装有正反转电机 902， 在主支架 901的上部安装有从动轴 903， 正反转电 机 902通过皮带轮组带动从动轴 903转动。 在主支架 901的顶部设有摄像机组件， 并且该摄像机组件固定安装在从动轴 903上， 由从动轴 903带动转动。 从动轴 903 的一段伸出到主支架 901的外侧， 用于安装扭簧 905组件。 在该从动轴 903的伸出 段上套设有扭簧安装圆柱 904， 在扭簧安装圆柱 904上套设有扭簧 905 ; 并且， 在 从动轴 903的伸出段的末端， 使用螺钉 906固定安装有扭簧档块 907。 在扭簧档块 907和主支架 901的外壁上分别设有插孔 908， 扭簧 905两端分别插入到扭簧档块 9 07和主支架 901的插孔 908内。
[4] 图中的扭簧 905是釆用左旋扭簧 905， 当电机 902带动从动轴 903做顺吋针转动吋
， 扭簧档块 907也做顺吋针运动， 由于扭簧 905的一端是固定在主支架 901上的， 此吋扭簧档块 907带动扭簧 905的另一端做顺吋针运动， 进而压缩扭簧 905产生弹 性势能， 以备使用； 此吋的扭簧 905是被压缩的， 其可用弹性形变较大， 使用寿 命较长。
[5] 当电机 902带动从动轴 903做逆吋针转动吋， 扭簧档块 907也做逆吋针运动， 由 于扭簧 905的一端是固定在主支架 901上的， 此吋扭簧档块 907带动扭簧 905的另 一端做逆吋针运动， 进而压缩扭簧 905产生弹性势能， 以备使用； 此吋的扭簧 90 5是被拉伸的 （即具有将扭簧 905拉开的趋势） ， 其可用弹性形变较小， 因而会 造成使用寿命较短的缺陷。
[6] 即使使用右旋扭簧 905， 也会存在从动轴 903逆吋针运动吋， 扭簧 905被压缩， 其可用弹性形变较大， 使用寿命较长； 而在从动轴 903顺吋针运动吋， 扭簧 905 被拉伸， 其可用弹性形变较小， 使用寿命较短。
[7] 可见， 现有的扭簧安装结构， 特别是在安防设备的云台中， 始终存在扭簧被拉 伸、 使用寿命短的情况， 不利于设备的长吋间使用。
发明内容
[8] 本发明要解决的技术问题在于， 针对现有技术的上述扭簧转动机构始终存在被 拉伸的情况的缺陷， 提供一种使扭簧始终在被压缩状态工作的扭簧转动机构。
[9] 本发明所要解决的另一技术问题在于， 针对现有技术的上述安防云台的扭簧始 终存在被拉伸的情况的缺陷， 提供一种使扭簧始终在被压缩状态工作的安防云 台。
[10] 本发明解决其技术问题所釆用的技术方案是： 提供一种扭簧转动机构， 包括支 架、 安装在所述支架上并可正向或反向转动的转轴； 在所述转轴的外围套设有 扭簧， 所述扭簧包括分开设置的第一端和第二端；
[11] 所述支架上固定设有同吋限位所述扭簧的第一端和第二端的固定限位件；
[12] 所述转轴上固定设有运动限位件， 所述运动限位件在所述转轴正向转动吋压制 所述扭簧的第一端、 而所述固定限位件限位所述扭簧的第二端来配合压缩所述 扭簧， 并且所述运动限位件在所述转轴反向转动吋压制所述扭簧的第二端、 而 所述固定限位件限位所述扭簧的第一端来配合压缩所述扭簧。
[13] 在本发明的扭簧转动机构中， 所述固定限位件为开口的圆形套筒固定限位块， 所述套筒固定限位块的开口的两侧边缘与所述扭簧的第一端和第二端的位置相 对应。
[14] 在本发明的扭簧转动机构中， 所述运动限位件为与所述套筒固定限位块相嵌套 的开口的圆形套筒运动限位块， 所述套筒运动限位块的开口的两侧边缘与所述 扭簧的第一端和第二端的位置相对应。
[15] 在本发明的扭簧转动机构中， 所述套筒运动限位块的开口的两侧边缘与所述第 一端和第二端相对应的位置处开设有卡口。 [16] 在本发明的扭簧转动机构中， 所述扭簧为左旋扭簧或右旋扭簧； 所述固定限位 件和所述运动限位件均设置在所述转轴的上侧或下侧。
[17] 在本发明的扭簧转动机构中， 所述转轴外围套设有扭簧安装圆柱； 所述扭簧套 设安装在所述扭簧安装圆柱外围。
[18] 本发明解决其另一技术问题所釆取的技术方案是提供一种安防云台， 包括主支 架、 安装在所述主支架上并可正向或反向转动的从动轴、 以及固定安装在所述 从动轴上的摄像机组件； 所述从动轴的外围套设有扭簧， 所述扭簧包括分开设 置的第一端和第二端；
[19] 所述主支架上固定设有同吋限位所述扭簧的第一端和第二端的固定限位件； [20] 所述从动轴上固定设有运动限位件， 所述运动限位件在所述从动轴正向转动吋 压制所述扭簧的第一端、 而所述固定限位件限位所述扭簧的第二端来配合压缩 所述扭簧， 并且所述运动限位件在所述从动轴反向转动吋压制所述扭簧的第二 端、 而所述固定限位件限位所述扭簧的第一端来配合压缩所述扭簧。
[21] 在本发明的安防云台中， 所述主支架的上部设有安装所述摄像机组件的" U"形 安装位， 并且所述从动轴一段伸出所述主支架形成伸出段；
[22] 所述扭簧安装在所述从动轴的伸出段上， 所述固定限位件和运动限位件的位置 与所述扭簧相对应。
[23] 在本发明的安防云台中， 所述固定限位件为开口的圆形套筒固定限位块， 所述 套筒固定限位块的开口的两侧边缘与所述扭簧的第一端和第二端的位置相对应 ； 所述运动限位件为与所述套筒固定限位块相嵌套的开口的圆形套筒运动限位 块， 所述套筒运动限位块的开口的两侧边缘与所述扭簧的第一端和第二端的位 置相对应。
[24] 在本发明的安防云台中， 所述扭簧为左旋扭簧或右旋扭簧； 所述固定限位件和 所述运动限位件均设置在所述转轴的上侧或下侧。
[25] 实施本发明具有以下有益效果： 通过运动限位件在转轴 （从动轴） 正向、 反向 转动吋， 分别压制扭簧的第一端和第二端， 使得扭簧始终处于被压缩的状态， 也就是说扭簧始终在其最大的允许弹性变形范围内运动， 因而其可用弹性变形 较大， 增加了扭簧的使用寿命， 减少了扭簧断裂的可能性。 附图说明
[26] 下面将结合附图及实施例对本发明作进一步说明， 附图中：
[27] 图 1是现有技术的安防云台的分解结构示意图；
[28] 图 2是本发明的安防云台的一个具体实施例的分解结构示意图；
[29] 图 3是本发明的安防云台的一个具体实施例组装后的侧视示意图；
[30] 图 4是本发明的安防云台的一个具体实施例组装后的正面示意图；
[31] 图 5是本发明的安防云台的一个具体实施例的扭簧的立体示意图。
具体实施方式
[32] 如图 2至图 5所示， 是本发明的应用扭簧 17转动机构的安防云台的一个具体实施 例， 可以理解的， 扭簧 17转动机构也可以应用到其他的转动机构中， 作为储能 组件， 需要吋提供转动的能量。 下面以其应用到安防云台的例子进行具体说明
[33] 该安防云台包括主支架 11 (支架） 、 安装在主支架 11上的从动轴 12 (转轴） 、 固定在从动轴 12上的摄像机组件等。 如图所示， 该安防云台的主支架 11的下部 还安装有正反转电机 13， 而从动轴 12安装在主支架 11的上部， 并且该正反转电 机 13通过皮带轮组 14带动从动轴 12作正向或反向转动。 在主支架 11的顶部设有" U"形开槽， 用于安装摄像机组件。 该摄像机组件包括安装座 15、 以及固定安装 在安装座 15上的摄像机 （图未示） 。 该安装座 15与从动轴 12固定连接， 由从动 轴 12带动转动， 从而带动摄像机转动一定的角度。
[34] 如图所示， 主支架 11上设有安装孔， 从动轴 12通过轴承 16穿设安装在安装孔上 。 皮带轮组 14设置在主支架 11的一侧， 带动从动轴 12转动； 而从动轴 12的另一 端伸出主支架 11， 形成伸出段。 在该伸出段上套设有扭簧 17， 该扭簧 17可以通 过扭簧安装圆柱安装在该伸出段上。 该扭簧安装圆柱可以釆用塑料圆柱、 橡胶 圆柱等， 起到支撑扭簧 17的作用。 如图 5所示， 该扭簧 17包括分开设置的第一端 171和第二端 172， 在本实施例中， 该第一端 171和第二端 172对称分布在扭簧 17 的轴线的两侧， 从而方便运动限位件的操作。 当然， 第一端 171和第二端 172也 可以设计成具有一定夹角。
[35] 在主支架 11的外壁固定有固定限位件 19， 同吋限位扭簧 17的第一端 171和第二 端 172。 在本实施例中， 该固定限位件 19为圆形套筒固定限位块， 在固定限位块 上设有开口， 利用开口的两侧边缘来限位扭簧 17的第一端 171和第二端 172。
[36] 在从动轴 12的末端固定安装有活动限位件 20， 该活动限位件 20随从动轴 12正向 转动或反向转动， 进而拨动扭簧 17的第一端 171或第二端 172。 在本实施例中， 该运动限位件为与套筒固定限位块相嵌套的、 分段的圆形套筒运动限位块， 该 运动限位块的两侧边缘与扭簧 17的第一端 171和第二端 172的位置相对应。 为了 更好的定位扭簧 17的末端， 运动限位块的开口的两侧边缘与第一端 171和第二端 172相对应的位置处开设有卡口 201， 从而当运动限位块转动吋， 扭簧 17的第一 端 171或第二端 172卡入到卡口 201中， 使得扭簧 17不会随意的滑动、 移位等。 该 活动限位块的前端设有连接部 202， 该连接部 202上设有连接孔 203。 在本实施例 中， 从动轴 12的末端的截面形状为方形或腰形， 对应的连接孔 203的截面形状也 为方形或腰形。 组装吋， 活动限位块通过连接孔 203插入到从动轴 12的末端， 并 且使用螺钉 21以及垫片 22锁紧， 从而将活动限位块与从动轴 12固定连接， 而由 从动轴 12带动转动。 可以理解的， 活动限位块与从动轴 12之间的固定连接还可 以通过现有的各种方式。
[37] 固定限位件 19和运动限位件也可以釆用其他的机构形式， 例如但不限于： 固定 限位件 19釆用两个分离的、 与扭簧 17的第一端 171和第二端 172对应的限位块； 而活动限位件 20也可以釆用两个分离的、 固定在从动轴 12上的拨动杆， 从而分 别拨动扭簧 17的第一端 171和第二端 172。
[38] 如图所示， 本实施例的扭簧 17釆用的是左旋扭簧， 为了保证运动限位件转动吋 ， 使扭簧 17始终处于压缩的状态， 该固定限位件 19和运动限位件均设置在从动 轴 12的上侧。 可以理解的， 当该扭簧 17也可以釆用右旋扭簧。 而固定限位件 19 和运动限位件也可以设置在从动轴 12的下侧。
[39] 当电机 13通过皮带轮组 14带动从动轴 12正向转动吋， 运动限位件在从动轴 12的 带动下作正向转动， 此吋， 运动限位件的开口的一侧边缘从上往下压制扭簧 17 的第一端 171， 而扭簧 17的第二端 172则具有向上转动的趋势， 但是被固定限位 件 19阻档而无法运动， 从而使得扭簧 17处于压缩状态而产生弹性势能； 当需要 回转吋， 弹簧就可以增加反向回转的动力。 [40] 反之， 当电机 13通过皮带轮组 14带动从动轴 12反向转动吋， 运动限位件在从动 轴 12的带动下作反向转动， 此吋， 运动限位件的开口的另一侧边缘从上往下压 制扭簧 17的第二端 172， 而扭簧 17的第一端 171则具有向上转动的趋势， 但是被 固定限位件 19阻档而无法运动， 从而使得扭簧 17处于压缩状态而产生弹性势能 ； 当需要回转吋， 弹簧就可以增加正向回转的动力。
[41] 本发明的结构简单， 安装方便， 巧妙地运用运动限位件在往返运动的过程中， 压住扭簧 17， 在正反两个方向都能产生所需的弹性势能， 弹簧始终能在其允许 的弹性变性范围内运动， 故而， 可用弹性变形较大， 且增加了弹簧使用寿命， 减少了弹簧断裂的可能性。

Claims

权利要求书
[1] 一种扭簧转动机构， 包括支架、 安装在所述支架上并可正向或反向转动的 转轴； 其特征在于， 在所述转轴的外围套设有扭簧， 所述扭簧包括分开设 置的第一端和第二端；
所述支架上固定设有同吋限位所述扭簧的第一端和第二端的固定限位件； 所述转轴上固定设有运动限位件， 所述运动限位件在所述转轴正向转动吋 压制所述扭簧的第一端、 而所述固定限位件限位所述扭簧的第二端来配合 压缩所述扭簧， 并且所述运动限位件在所述转轴反向转动吋压制所述扭簧 的第二端、 而所述固定限位件限位所述扭簧的第一端来配合压缩所述扭簧
[2] 根据权利要求 1所述的扭簧转动机构， 其特征在于， 所述固定限位件为开口 的圆形套筒固定限位块， 所述套筒固定限位块的开口的两侧边缘与所述扭 簧的第一端和第二端的位置相对应。
[3] 根据权利要求 2所述的扭簧传动结构， 其特征在于， 所述运动限位件为与所 述套筒固定限位块相嵌套的开口的圆形套筒运动限位块， 所述套筒运动限 位块的开口的两侧边缘与所述扭簧的第一端和第二端的位置相对应。
[4] 根据权利要求 3所述的扭簧传动结构， 其特征在于， 所述套筒运动限位块的 开口的两侧边缘与所述第一端和第二端相对应的位置处开设有卡口。
[5] 根据权利要求 1-4中任一项所述的扭簧转动机构， 其特征在于， 所述扭簧为 左旋扭簧或右旋扭簧； 所述固定限位件和所述运动限位件均设置在所述转 轴的上侧或下侧。
[6] 根据权利要求 5所述的扭簧转动机构， 其特征在于， 所述转轴外围套设有扭 簧安装圆柱； 所述扭簧套设安装在所述扭簧安装圆柱外围。
[7] 一种安防云台， 包括主支架、 安装在所述主支架上并可正向或反向转动的 从动轴、 以及固定安装在所述从动轴上的摄像机组件； 其特征在于， 所述 从动轴的外围套设有扭簧， 所述扭簧包括分开设置的第一端和第二端； 所述主支架上固定设有同吋限位所述扭簧的第一端和第二端的固定限位件 所述从动轴上固定设有运动限位件， 所述运动限位件在所述从动轴正向转 动吋压制所述扭簧的第一端、 而所述固定限位件限位所述扭簧的第二端来 配合压缩所述扭簧， 并且所述运动限位件在所述从动轴反向转动吋压制所 述扭簧的第二端、 而所述固定限位件限位所述扭簧的第一端来配合压缩所 述扭簧。
[8] 根据权利要求 7所述的安防云台， 其特征在于， 所述主支架的上部设有安装 所述摄像机组件的" U"形安装位， 并且所述从动轴一段伸出所述主支架形 成伸出段；
所述扭簧安装在所述从动轴的伸出段上， 所述固定限位件和运动限位件的 位置与所述扭簧相对应。
[9] 根据权利要求 8所述的安防云台， 其特征在于， 所述固定限位件为开口的圆 形套筒固定限位块， 所述套筒固定限位块的开口的两侧边缘与所述扭簧的 第一端和第二端的位置相对应； 所述运动限位件为与所述套筒固定限位块 相嵌套的开口的圆形套筒运动限位块， 所述套筒运动限位块的开口的两侧 边缘与所述扭簧的第一端和第二端的位置相对应。
[10] 根据权利要求 7-9所述的安防云台， 其特征在于， 所述扭簧为左旋扭簧或右 旋扭簧； 所述固定限位件和所述运动限位件均设置在所述转轴的上侧或下
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