WO2013139275A1 - 用于断路器的机电操作型底盘车 - Google Patents

用于断路器的机电操作型底盘车 Download PDF

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Publication number
WO2013139275A1
WO2013139275A1 PCT/CN2013/072942 CN2013072942W WO2013139275A1 WO 2013139275 A1 WO2013139275 A1 WO 2013139275A1 CN 2013072942 W CN2013072942 W CN 2013072942W WO 2013139275 A1 WO2013139275 A1 WO 2013139275A1
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WO
WIPO (PCT)
Prior art keywords
chassis
clutch
rotating body
power
screw
Prior art date
Application number
PCT/CN2013/072942
Other languages
English (en)
French (fr)
Inventor
陈清奇
鲍丽华
Original Assignee
伊顿电气有限公司
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Filing date
Publication date
Application filed by 伊顿电气有限公司 filed Critical 伊顿电气有限公司
Publication of WO2013139275A1 publication Critical patent/WO2013139275A1/zh

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00Switchgear having carriage withdrawable for isolation
    • H02B11/12Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
    • H02B11/127Withdrawal mechanism

Definitions

  • This invention relates to low voltage, medium voltage electrical equipment, and more particularly to an electromechanically operated chassis vehicle for use in a medium voltage circuit breaker. Background technique
  • a chassis In the field of medium voltage electrical, one of ordinary skill in the art will recognize that in order to propel or pull a circuit breaker to move between a working position and a test position, a chassis is typically employed to carry the circuit breaker. At present, in terms of the operating structure of the chassis, it can be roughly classified into a mechanically operated chassis vehicle and an electromechanically operated chassis vehicle.
  • a clutch is generally used to combine the power of the motor with the lead screw through the power transmission mechanism to advance or pull out the circuit breaker.
  • An electric utility vehicle is disclosed in a Chinese utility model patent application filed on August 20, 2009 by Wenzhou New Electromechanical Co., Ltd., entitled “Electric Chassis Drive Assembly", Application No. 200920191866.X , can be operated manually or electrically.
  • Its clutches include bushings, main gears, clutch gears, springs, push rods and steel balls.
  • the electromagnet when the electromagnet is energized, the push rod is moved downward, so that the steel ball is pulled out from the through hole of the sleeve 5 and engaged with the card slot on the clutch gear, so that the main gear and the clutch gear are engaged. Torque is then transmitted to the output gear through the drive gear set to drive the lead screw to rotate. Thereby electrically pushing or pulling out the circuit breaker.
  • the electromagnet In the manual operation mode, the electromagnet is de-energized, the push rod moves up under the action of the spring, and the steel ball enters the through hole of the sleeve from the slot of the clutch gear, and the main gear and the clutch gear are disengaged, so that A handle is used in conjunction with the lead screw to push or pull the circuit breaker.
  • the clutches used therein include a clutch shaft block, a clutch release spring, a clutch clutch fast, a worm wheel, and a sprocket.
  • the power of the motor is engaged with the worm wheel through the output shaft of the motor, and the steel ball in the bore of the worm wheel is moved outward in the axial direction of the rotating shaft, which drives the clutch to rotate and rotates rapidly, and engages with the clutch shaft block to drive the clutch.
  • the shaft block, the shaft, and the sprocket rotate.
  • the The sprocket is combined with the T-type screw through a transmission transmission mechanism such as a transmission chain and a driven sprocket to realize the pushing or pulling out of the circuit breaker.
  • the clutch can be separated by simply turning the T-screw at an angle in the opposite direction to the desired direction of rotation.
  • an object of the present invention is to provide an electromechanically operated chassis vehicle for a circuit breaker which is simple in structure, easy to operate, and low in manufacturing cost.
  • the present invention provides an electromechanically operated chassis vehicle for a circuit breaker including a static frame, a moving frame on which a circuit breaker is placed, and a lead screw rotatably mounted on
  • the moving frame is mounted on the screw frame, and the moving frame is mounted on the lead screw when the screw is rotated, and the moving frame can be made relative to the static when the screw is rotated Moving the frame along the axis of the screw; a power system mounted on the moving frame; a power transmission system for transmitting power of the power system to the lead screw for pushing or pulling out The moving frame; an automatic clutch disposed between the power system and the power transmission system; the automatic clutch is a centrifugal clutch.
  • the electromechanically operated chassis of the above-mentioned circuit breaker of the present invention has a centrifugal transmission clutch, so that the power transmission system of the chassis of the present invention has a simple structure and requires fewer components than the conventional chassis. .
  • the operating procedure is much simpler for the operator, and the manufacturing cost of the chassis is also significantly reduced for the manufacturer.
  • the centrifugal clutch includes a housing; a driving shaft supported on the housing, having a power input end and a power output end; a rotating body, the rotating body is disposed on the driving shaft On the output end; an elastic device, the elastic device is coupled to the rotating body; and an engaging device supported on the outer casing.
  • the rotating body is engageable with the engaging means against the elastic force of the elastic means by the driving of the driving shaft.
  • the centrifugal clutch of this configuration can automatically transmit or cut off the power of the power system to the lead screw driven by the power system. This is not found in prior art chassis cars. In addition, for a chassis with limited internal installation space, the overall size of the chassis can be made compact and economical.
  • the rotating body includes one end pivotally connected to the At least one clutch piece on the power output end of the drive shaft and the other end is a free end. This allows one of ordinary skill in the art to determine the specific attachment of the free end of the clutch plate to the resilient means as desired.
  • the elastic means includes at least one return spring coupled at one end to the power output end of the main shaft and at the other end to the rotating body. This clearly determines that the return spring can achieve a resetting action on the rotating body in a simple manner.
  • the at least one clutch plate is two clutch plates, and one end of each of the two clutch plates is pivotally coupled to the driving shaft of the driving shaft.
  • At least one of the clutching piece and the engaging means includes a friction means for increasing a bonding force with the engaging means.
  • the friction device includes a metal layer, a bakelite layer, and a corundum layer disposed sequentially from the inside to the outside of the surface. It is not necessary that the friction means is a groove provided in the longitudinal direction of the outer edge of the clutch piece.
  • a manually operated device engageable with the lead screw to advance or pull the carriage. This arrangement allows the chassis to be mechanically manipulated to compensate for the drawbacks of the electrically operated chassis.
  • Figure 1 is a plan view schematically showing an electromechanically operated chassis vehicle of the present invention
  • FIG. 2 is a block diagram schematically showing an electric power transmission structure for an electromechanically operated chassis vehicle of the present invention
  • FIG. 3 is a perspective view schematically showing an automatic clutch used in the electromechanically operated chassis vehicle of the present invention
  • FIG. 4 is a cross-sectional view showing the automatic clutch used in the electromechanically operated chassis of the present invention.
  • the same or similar features or elements are denoted by the same reference numerals.
  • FIG. refers to a specific technical feature with reference to a certain drawing, but it should not be understood that the specific technical feature or its equivalent is only included in the In the drawings.
  • the chassis of the present invention is generally applicable to moving a low voltage or medium voltage circuit breaker, but for the convenience of description herein, only the electromechanically operated chassis vehicle for a medium voltage circuit breaker will be described.
  • the present invention provides an electromechanically operated chassis vehicle, comprising a stationary static frame 6, which can rotatably support a lead screw 4; a moving frame 7 for placing a circuit breaker, which can be opposite to the chassis
  • the static frame 6 is moved in the axial direction of the lead screw 4.
  • the lead screw 4 is mounted on the motor frame 7 by a nut.
  • the present invention provides a power system 1 mounted on the motor frame 7.
  • the power system 1 may be an electric motor, a hydraulic motor, a magnetic device, a wind power device, a battery, or the like.
  • the present invention also provides a power transmission system 2 for transmitting power of the power system 1 to the lead screw 4 to propel or pull out the carriage 7, thereby implementing a moving circuit breaker.
  • the present invention also provides an automatic clutch 9 disposed between the power system 1 and the power transmission system 2.
  • the chassis of the present invention can be operated not only electrically but also mechanically.
  • the present invention also provides a manually operated device 3, such as a handle, that mechanically operates the lead screw 4 to move (i.e., push or pull) the chassis.
  • a manually operated device 3 such as a handle
  • holes for alignment of the lead screw 4 are provided on the stationary frame 6 and the movable frame 7, so as to facilitate insertion of the manual operating device 3 to engage the manual operating device 3 with the lead screw 4.
  • a safety device (not shown) is usually provided in the chassis. Once the safety device detects that the manual operating device 3 is performing the work, the power transmission of the power system 1 is automatically cut off.
  • the operator selects whether or not to turn on the electric operation switch as needed.
  • the chassis is manually operated during the installation, commissioning or overhaul period when the power supply circuit is not energized.
  • FIG. 2 the flow of the conventional power transmission is shown in the form of a block diagram in which the electric motor 8, the automatic clutch 9, the transmission 10, and the output sprocket 11 as the power system are shown in order.
  • the power from the motor 8 is transmitted to the output sprocket 11 through the automatic clutch 9, the transmission 10, and then to the lead screw 4.
  • the output sprocket 11 is then engaged with the lead screw 4.
  • any other form of shifting device, output device may be utilized without being limited to the gearbox 10, output sprocket 11 illustrated in FIG.
  • the automatic clutch 9 used in the present invention may be an electronic automatic clutch, a roller type automatic clutch, a centrifugal clutch or the like.
  • the automatic clutch 9 is a centrifugal clutch.
  • the present invention provides a centrifugal clutch of a simple structure, which can transmit power of a power system 1, such as an electric motor, to the power transmission system 2 as needed.
  • the centrifugal clutch includes a housing 12 on one side of which supports the drive shaft 16 via a shaft 7
  • the engagement device 13 is again engaged with the driven shaft 17.
  • the driven shaft 17 is then engaged with the lead screw 4.
  • the drive shaft 16 has a power input end and a power output end that is coupled to a shaft of a power system 1 such as an electric motor, and the power output end is coupled to the rotating body to pass power of the motor through the rotating body and the engaging device The joints are passed out.
  • the engaging device 13 can be sequentially connected with the gearbox 10 and/or the output sprocket 11 to drive the screw 4 to rotate, thereby driving the moving frame 7 to move, thereby realizing the movement of the circuit breaker.
  • a fixed pin that is coupled to the rotating body and a limit pin that limits the rotating body are disposed on the power output end of the drive shaft 16.
  • the fixing pin and the limiting pin of the present invention may be multiple, and the end faces along the power output end may be Evenly arranged, it can also be arranged unevenly.
  • the fixed pin of the power take-off may be disposed on or off the axis of the drive shaft 16.
  • the rotating body when the driving shaft 16 rotates, the rotating body can be rotated together, that is, the driving shaft 16 drives the rotating body to perform centrifugal movement.
  • the engaging device 13 when the rotating body rotates at a predetermined speed under the driving of the driving shaft 16, the engaging device 13 is engaged to transmit power from the driving shaft 16 to the engaging device 13;
  • the rotational speed of the drive shaft 16 is lower than the predetermined speed, the engagement device 13 is disengaged, thereby preventing the power from the drive shaft 16 from being transmitted to the engagement device 13.
  • the predetermined speed can be selected according to actual needs, and is not limited to a certain speed, and may be a speed range.
  • the control circuit can control the rotational speed of the motor according to the load condition of the moving frame driven by the screw, thereby realizing the engagement of the rotating body and the engaging device. Timing is controlled. It is also possible to connect the elastic means to the above-mentioned rotating body as shown in Figs. The rotating body can be engaged with the engaging device 13 against the elastic force of the elastic device under the driving of the driving shaft 16.
  • the engaging means 13 may be a sleeve-type member whose inner surface is engageable with the rotating body.
  • the resilient means can be at least one return spring 14.
  • the material and shape of the return spring 14 are designed to take into account factors such as the power of the motor, the moving frame and its load.
  • the rotating body comprises at least one clutch plate 15. 3 and 4 show only two clutch plates 15 and one return spring 14, wherein the lower ends of the two clutch plates 15 are provided with holes for penetrating into the fixing pins of the power output end of the drive shaft 16, The return spring 14 is interposed between the upper ends (ie, the free ends) of the two clutch plates 15.
  • the clutch piece 15 can pivot about the fixing pin.
  • the limit pin of the power output end is located between the upper ends of the two clutch pieces 15 and the return spring 14 to prevent direct contact between the upper ends of the two clutch pieces 15. Even the collision, especially when the rotational speed of the drive shaft 16 is reduced to a certain extent, the upper end of the clutch piece 15 will collide under the pulling of the return spring 14.
  • the number of rotating bodies, such as the clutch plates 15, may or may not correspond to the number of resilient means, such as the return springs 14. Both ends of the elastic means such as at least one return spring 14 may be connected between the upper end of the rotating body such as the clutch piece 15, or may be connected at one end to the upper end of the clutch piece 15 and at the other end to the drive shaft.
  • a friction means may be provided on the surface of the clutch piece.
  • the friction device may be a metal layer, a bakelite layer, and a corundum layer disposed from the inside to the outside in order from the surface. It may also be a groove longitudinally disposed along the outer edge of the clutch sheet.
  • a friction means may be provided on the inner surface of the engaging means.
  • the friction means may be a metal layer, a bakelite layer or a corundum layer which is disposed from the inner surface in order from the inside to the outside. It may also be a groove longitudinally disposed along the inner surface of the engaging means.
  • the rotation is 16 and the rotating body rotates with the drive shaft 16 .
  • the rotating body is opened by the centrifugal force against the tensile force of the elastic means, and then engaged with the inner surface of the engaging means to transmit the power of the motor to the lead screw 4. Achieve the operation of the lead screw 4 to push or pull the circuit breaker. In this electric operation, the mechanical manual operation of the chassis is not possible for safety reasons.
  • the chassis of the present invention When the chassis of the present invention is mechanically manually, generally in the stage of installation, commissioning, inspection or inspection, when the motor is powered off, the manual operation device 3 such as the handle is inserted into the static frame 6 and the lead screw 4 is engaged. Under the rotation, the lead screw 4 is rotated together to realize the operation of the lead screw 4 to push or pull the circuit breaker.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

用于断路器的机电操作型底盘车,包括静车架(6),动车架(7),其上用于放置断路器,丝杠(4),其可旋转地安装在静车架(6)上,该丝杠(4)上安装动车架(7),在该丝杠(4)旋转时可以使动车架(7)相对于静车架(6)沿着丝杠(4)的轴线方向运动,动力系统(1),其安装在动车架(7)上,动力传动系统(2),其用于将动力系统(1)的动力传递到丝杠(4),以推进或拉出动车架(7),设置在动力系统(1)和动力传动系统(2)之间的自动离合器(9),该自动离合器(9)是离心离合器。

Description

用于断路器的机电操作型底盘车 技术领域
本发明涉及低压、 中压电气设备, 尤其是涉及用于中压断路器的、 釆 用自动离合器的机电操作型底盘车。 背景技术
在中压电气领域, 普通技术人员知道, 为了将断路器推进或拉出以在 工作位置和试验位置之间移动, 一般都釆用底盘车来承载断路器。 目前, 就底盘车的操作结构而言, 大体可分为机械操作型底盘车和机电操作型底 盘车。
在机械操作型底盘车中, 利用手把与丝杠的直接结合来推进或拉出断 路器。 因而, 不需要离合器。 而在机电操作型底盘车中, 一般都会使用离 合器来将电动机的动力经动力传送机构与丝杠结合, 从而实现推进或拉出 断路器。
在温州新机电电气配套有限公司于 2009年 8月 20日申请的、 名称为 "电动底盘车传动总成" 的、 申请号为 200920191866.X的中国实用新型专 利申请中披露了一种电动底盘车, 可以手动或电动方式来操作。 其离合器 包括轴套、 主齿轮、 离合齿轮、 弹簧、 推杆以及钢珠。 在电动操作模式下, 电磁铁通电时, 使推杆向下移动, 使钢珠从轴套 5的通孔中被拉出并与离 合齿轮上的卡槽卡合, 从而主齿轮、 离合齿轮接合, 再通过传动齿轮组将 扭矩传送到输出齿轮以驱动丝杠旋转。 从而电动地实现推进或拉出断路 器。 在手动操作方式下, 电磁铁断电, 推杆在弹簧的作用下上移, 钢珠从 离合齿轮啥个的卡槽进入轴套的通孔中, 主齿轮与离合齿轮脱开接合, 从 而可以用手柄来与丝杠结合以推进或拉出断路器。
在广州白云电器设备股份有限公司于 2005年 12月 2日申请的、 名称 为 "中置式真空断路器底盘车的电动操作模块" 的、 申请号为 200520119691.3 的中国实用新型专利申请中披露了一种机电操作型底盘 车。其釆用的离合器包括离合器连轴块、 离合器分离弹簧、 离合器离合快、 蜗轮、 链轮。 在电动操作模式下, 电动机的动力经电动机输出轴与蜗轮的 接合, 将蜗轮雉孔内的钢珠在转轴轴向上向外移动, 带动离合器离合快转 动, 与离合器连轴块接合, 从而带动离合器连轴块、 转轴、 链轮转动。 该 链轮通过传动链、 从动链轮等传动传送机构与 T型丝杠结合, 从而实现推 进或拉出断路器。 在手动操作模式下, 只需将 T型丝杠沿着与期望转动方 向相反的方向上转动一个角度, 即可实现离合器的分离。
由上所述可知, 现有机电操作型底盘车中的离合器结构都比较复杂, 制造成本较高。某些类型的离合器不能自动分离,导致用户操作非常不便, 而且还存在误操作或过操作致使损坏部件的情况出现。 发明内容
为此, 本发明的目的是提供一种结构简单、 操作容易、 制造成本低的 用于断路器的机电操作型底盘车。
为了实现本发明的上述目的, 本发明提供一种用于断路器的机电操作 型底盘车, 其包括静车架; 动车架, 其上用于放置断路器; 丝杠, 其可旋 转地安装在所述静车架上, 该丝杠上安装所述动车架, 在该丝杠旋转时该 丝杠上安装所述动车架, 在该丝杠旋转时可以使所述动车架相对于所述静 车架沿着该丝杠的轴线方向运动; 动力系统, 其安装在所述动车架上; 动 力传动系统, 其用于将所述动力系统的动力传递到所述丝杠, 以推进或拉 出所述动车架; 设置在所述动力系统和所述动力传动系统之间的自动离合 器; 所述自动离合器是离心离合器。
本发明的上述断路器的机电操作型底盘车, 由于釆用离心离合器, 所 以本发明的底盘车整体上而言其动力传递系统的特点是结构简单, 需要的 零部件大大少于传统的底盘车。 于是对于操作人员而言其操作程序也简易 许多, 对于制造者而言也显著地降低了底盘车的制造成本。
在本发明的一个优选方案中, 所述离心离合器包括外壳; 主动轴, 其 支撑于所述外壳上, 具有动力输入端和动力输出端; 旋转体, 该旋转体设 置于所述主动轴的动力输出端上; 弹性装置, 该弹性装置与所述旋转体连 接; 接合装置, 该接合装置支撑于所述外壳上。 所述旋转体可在所述主动 轴的带动下克服所述弹性装置的弹力而与所述接合装置接合。 这种结构的 离心离合器能够在动力系统的带动下自动地将动力系统的动力传递至所 述丝杠或将其切断。 这是现有技术的底盘车中所没有的。 另外, 这对于内 部安装空间有限的底盘车而言, 可以使底盘车的整体尺寸紧凑, 具有显著 的经济性。
在本发明的进一步优选方案中, 所述旋转体包括一端枢转地连接于所 述主动轴的动力输出端上而另一端为自由端的至少一个离合片。 这允许本 领域的普通技术人员可以根据实际需要而决定离合片的自由端与弹性装 置的具体连接方式。
在本发明的另一个优选方案中, 所述弹性装置包括一端连接于所述主 动轴的动力输出端上而另一端连接于所述旋转体的至少一个回位弹簧。 这 明确地确定了回位弹簧以简单方式即可实现对旋转体的复位作用。
在本发明的另一个优选方案中, 所述至少一个离合片为两个离合片, 该两个离合片各自的一端都偏离所述主动轴的轴线地一起枢转连接于所 述主动轴的动力输出端上的一个固定销上, 而其自由端与所述弹性装置连 接。 这种布置方式使离合片易于达到平衡状态。
在本发明的另一个优选方案中, 所述离合片、 所述接合装置至少之一 包括摩擦装置, 用于增加与所述接合装置的结合力。 非必须地, 所述摩擦 装置包括从所述表面依次从内到外设置的金属层、 胶木层、 金刚砂层。 非 必须, 所述摩擦装置是沿所述离合片的外边缘的纵向方向设置的槽。
在本发明的另一个优选方案中, 还包括可与所述丝杠接合以推进或拉 出所述动车架的手动操作装置。 这种布置形式允许以机械方式操作所述底 盘车, 弥补了电动操作底盘车的缺陷。
本领域的普通技术人员在阅读了具体实施方式后会显而易见地明白 本发明的用于断路器的机电操作型底盘车相比于现有技术的上述优点。 附图说明
下面参照附图, 详细描述本发明, 其中:
图 1示意地示出本发明的机电操作型底盘车的俯视图;
图 2示意地示出用于本发明的机电操作型底盘车的电动动力传递结构 框图;
图 3示意地示出用于本发明的机电操作型底盘车的自动离合器的立体 图; 以及
图 4以剖面图示出用于本发明的机电操作型底盘车的自动离合器。 在本说明书和附图中, 以相同的附图标记表示相同的或相似的特征或 元件。
附图标记列表 1-动力系统; 2-动力传动系统; 3-手动操作装置; 4-丝杠; 5-螺母 6-静车架; 7-动车架; 8-电动机; 9-自动离合器; 10-变速箱; 11-输出 链轮; 12-自动离合器外壳; 13-接合装置; 14-弹性装置; 15-离合片; 16-主动轴; 17-从动轴; 18-轴 7 具体实施方式
现参考以下的说明以及附图, 详细说明本发明的示意性方案。 该申请 的附图不完全是按具体实施方案的实际尺寸绘制, 且在尺寸方面的变化都 不应解释为使对本发明的限制。
下文中 "如图 ......所示" 或类似表述, 是指参考某附图对特定技术特 征进行描述, 但是, 不应理解为, 该特定技术特征或其等同内容仅仅包括 在该附图中。
在下文中某些方向性术语, 例如 "上端" 和其它方向性术语, 是面对 附图时该特征所处或所指的方向。 但在应用场合改变时, 则这些方向性术 语表示的方向也会相应地改变。
现在参照图 1-4, 对本发明具体描述如下。
如图 1所示, 本发明的底盘车一般地可用于移动低压或中压断路器, 但在本说明书为了描述的方便, 仅对用于中压断路器的机电操作型底盘车 进行描述。 本发明提供一种机电操作型底盘车, 包括固定不动的静车架 6, 该静车架 6上可以旋转地支撑丝杠 4; 用于放置断路器的动车架 7 , 其可 以相对于所述静车架 6沿着该丝杠 4的轴线方向运动。 丝杠 4通过螺母安 装于所述动车架 7上。 为了驱动所述丝杠 4旋转, 本发明提供了安装在所 述动车架 7上的动力系统 1。 优选地, 该动力系统 1可以是电动机、 液压 马达、 磁力装置、 风力装置、 蓄电池等。 本发明还提供动力传动系统 2, 其用于将所述动力系统 1的动力传递到所述丝杠 4, 以推进或拉出所述动 车架 7 , 从而实现移动断路器。 为了能够按照所需地将动力系统 1的动力 传递到动力传动系统, 本发明还提供设置在所述动力系统 1和所述动力传 动系统 2之间的自动离合器 9。
本发明的底盘车不仅可以电动操作, 还可以机械操作。 为此, 本发明 还提供有机械操作所述丝杠 4以移动(即推进或拉出)该底盘车的手动操 作装置 3 , 比如手柄。 在静车架 6、 动车架 7上还设置有所述丝杠 4对准 的孔, 以便于插入手动操作装置 3 , 使手动操作装置 3与所述丝杠 4接合。 为了避免电动操作与机械操作冲突或同时起作用, 通常在底盘车中设置有 安全装置 (图中未示)。 一旦安全装置检测到手动操作装置 3 在进行作业 时, 就自动切断动力系统 1的动力传递。 当手动操作装置 3完成作业时, 操作人员按照需要选择是否接通电动操作开关。 反之也是如此。 比如, 在 实践中, 一般情况下是在供电回路不通电时, 在安装、 调试或检修阶段进 行手动操作底盘车。
如在图 2中所示, 以框图的形式示出传统的动力传递的流程, 其中依 次示出作为动力系统的电动机 8、 自动离合器 9、 变速箱 10、输出链轮 11。 由图 2中可清晰地得知, 来自电动机 8的动力经过自动离合器 9、 变速箱 10后传递到输出链轮 11 , 再传递到丝杠 4。 该输出链轮 11再与丝杠 4接 合。 但是, 本领域的普通技术人员会明白, 在具体实施例中, 可以釆用任 何其它形式的变速装置、输出装置而不限于图 2所示的变速箱 10、输出链 轮 11。
本发明中所釆用的自动离合器 9可以是电子自动离合器、 滚柱式自动 离合器、 离心离合器等。
在本发明的一个优选实施例中, 该自动离合器 9是离心离合器。 如图 3所示, 本发明提供一种结构简单的离心离合器, 可以按照需要将动力系 统 1比如电动机的动力传递到动力传递系统 2。该离心离合器包括外壳 12, 该外壳 12的一侧上通过轴 7| 18支撑主动轴 16而另一侧上通过轴 7| 18支 撑接合装置 13。 该接合装置 13再与从动轴 17接合。 该从动轴 17再与丝 杠 4接合。 由于接合装置 13、 从动轴 17、 丝杠 4的接合细节, 属于现有 技术的范围, 故在本说明书中为了描述的简洁, 下文对三者之间动力传递 过程直接叙述为接合装置 13可以带动丝杠 4旋转。
该主动轴 16具有动力输入端和动力输出端, 该动力输入端与动力系 统 1比如电动机的轴接合, 而该动力输出端与旋转体连接, 以将电动机的 动力通过该旋转体与该接合装置的接合传递出来。 如图 2所示, 该接合装 置 13又可以与变速箱 10和 /或输出链轮 11依次动力连接而带动丝杠 4旋 转, 进而带动动车架 7移动, 于是实现移动断路器。
如图 3和 4清晰地所示, 在主动轴 16的动力输出端上设置有与所述 旋转体连接的固定销以及对所述旋转体进行限位的限位销。 为了视图简 洁, 图中仅示出一个固定销和一个限位销, 但本领域的普通技术人员会明 白本发明的固定销和限位销都可以为多个, 可以沿着动力输出端的端面均 匀布置, 也可以非均匀布置。 在一个优选实施例中, 如图 4所示, 动力输 出端的固定销可以设置成为位于主动轴 16的轴线上, 也可以偏离该轴线。 这样, 当主动轴 16旋转时, 就可以带动旋转体一起旋转, 也即主动轴 16 带动旋转体进行离心运动。 比如, 当所述旋转体在所述主动轴 16 的带动 下旋转转速达到预定速度时与所述接合装置 13接合, 从而将动力从所述 主动轴 16传递到该接合装置 13 ;所述旋转体在所述主动轴 16的带动下旋 转转速低于预定速度时与所述接合装置 13 脱开接合, 从而防止将来自所 述主动轴 16的动力传递到该接合装置 13。 该预定速度可以根据实际需要 而进行选择, 不仅局限于某几个速度, 可能是一个速度范围。 比如, 为了 能够实现旋转体在上述预定速度才与接合装置 13接合, 可以釆用控制电 路根据丝杠带动的动车架负载情况而对电动机的转速进行控制, 从而实现 对旋转体与接合装置的接合时机进行控制。 还可以是, 如图 3和 4所示的 与上述旋转体连接弹性装置。 所述旋转体可在所述主动轴 16 的带动下克 服所述弹性装置的弹力而与所述接合装置 13接合。
如图 3所示, 所述接合装置 13 可以是一个套筒型部件, 其内表面可 以与所述旋转体接合。
在一个优选实施例中, 该弹性装置可以是至少一个回位弹簧 14。设计 该回位弹簧 14 的材料和形状时要考虑电动机的动力、 动车架及其负载等 因素。 在一个优选实施例中, 该旋转体包括至少一个离合片 15。 为了视图 简洁, 图 3和 4仅示出两个离合片 15和一个回位弹簧 14, 其中两个离合 片 15的下端都设置有孔以一起穿入主动轴 16的动力输出端的固定销中, 而该两个离合片 15的上端(即自由端)之间夹置连接该回位弹簧 14。 于是, 离合片 15可以绕着该固定销枢转。 在两个离合片 15的下端都穿入固定销 时, 动力输出端的限位销正好位于两个离合片 15与回位弹簧 14连接的上 端之间, 以防止两个离合片 15 的上端直接接触, 甚至碰撞, 尤其是当主 动轴 16的旋转速度降低到一定程度时在回位弹簧 14的拉动下, 离合片 1 5的上端会碰撞。
在一些优选实施例中, 旋转体比如所述离合片 15 的数量与弹性装置 比如所述回位弹簧 14 的数量可以对应, 也可以不对应。 所述弹性装置比 如至少一个回位弹簧 14 的两个端部可以都连接到所述旋转体比如离合片 15的上端之间, 也可以一端连接到离合片 15的上端而另一端连接到主动 轴的动力输出端的端面上。 为了增加所述离合片与所述接合装置的结合力, 可以在所述离合片的 表面上设置摩擦装置。 该摩擦装置可以是从所述表面依次从内到外设置的 金属层、 胶木层、 金刚砂层。 还可以是沿所述离合片的外边缘纵向地设置 的槽。
与所述离合片的摩擦装置相对应地, 也可以在所述接合装置的内表面 上设置摩擦装置。 该摩擦装置可以是从所述内表面依次从内到外设置的金 属层、 胶木层、 金刚砂层。 还可以是沿所述接合装置的内表面纵向地设置 的槽。
下面简要对本发明的用于断路器的机电操作型底盘车的操作过程进 行描述。
当电动操作本发明的底盘车时, 给电动机通电时, 电动机带动主动轴
16旋转, 于是旋转体随着主动轴 16—起旋转。 当主动轴 16的旋转速度达 到一定程度时, 旋转体在离心力的作用克服弹性装置的拉力而张开, 于是 与接合装置的内表面接合, 将电动机的动力传递到丝杠 4。 实现丝杠 4对 断路器推进或拉出的操作。而在该电动操作过程中, 出于安全考虑的原因, 不可以进行机械手动操作底盘车。
当机械手动本发明的底盘车时, 一般是在安装、 调试、 检修或检测阶 段, 这时电动机是断电的, 将手动操作装置 3比如手柄插入静车架 6与丝 杠 4接合, 在手柄的转动下, 带动丝杠 4一起转动, 实现丝杠 4对断路器 推进或拉出的操作。
尽管本发明示出了多个实施例并且同时通过这些实施例描述了本发 明的底盘车的许多细节, 但不应该将上述细节解释为将本发明的范围局限 于或以任何形式限制到这些细节。 在阅读本发明的公开内容之后, 本发明 其它的优点和改变对于本领域技术人员来说 4艮容易明白。 因此, 可以在不 脱离申请人所要求的本发明的思想和范围的情况下做出改变。

Claims

权 利 要 求 书
1. 一种用于断路器的机电操作型底盘车, 其包括:
静车架 (6);
动车架 (7), 其上用于放置断路器;
丝杠(4), 其可旋转地安装在所述静车架 (6)上, 该丝杠(4)上安 装所述动车架 (7), 在该丝杠(4)旋转时可以使所述动车架 (7)相对于 所述静车架 (6) 沿着该丝杠(4) 的轴线方向运动;
动力系统 (1 ), 其安装在所述动车架 (7) 上;
动力传动系统 (2), 其用于将所述动力系统 (1 ) 的动力传递到所述 丝杠(4), 以推进或拉出所述动车架 (7), 其特征在于,
还包括设置在所述动力系统(1 )和所述动力传动系统(2)之间的自 动离合器(9);
所述自动离合器 (9)是离心离合器。
2. 如权利要求 1所述的底盘车, 其特征在于, 所述离心离合器包括: 外壳 ( 12);
主动轴 (16), 其支撑于所述外壳 ( 12) 上, 具有动力输入端和动力 输出端;
旋转体, 该旋转体设置于所述主动轴 (16) 的动力输出端上; 弹性装置, 该弹性装置与所述旋转体连接;
接合装置 (13), 该接合装置 (13) 支撑于所述外壳 (12) 上, 其中所述旋转体可在所述主动轴(16)的带动下克服所述弹性装置的 弹力而与所述接合装置 (13)接合。
3. 如权利要求 2所述的底盘车, 其特征在于, 所述旋转体包括一端枢 转地连接于所述主动轴(16) 的动力输出端上而另一端为自由端的至少一 个离合片 (15)。
4. 如权利要求 3所述的底盘车,其特征在于,所述至少一个离合片 ( 1
5) 为两个离合片, 该两个离合片各自的一端都偏离所述主动轴 ( 16) 的 轴线地一起枢转连接于所述主动轴( 16 )的动力输出端上的一个固定销上, 而其自由端与所述弹性装置连接。
5. 如权利要求 4所述的底盘车, 其特征在于, 所述离合片 (15) 包括 摩擦装置, 用于增加与所述接合装置 (13 ) 的结合力。
6. 如权利要求 5所述的底盘车, 其特征在于, 所述摩擦装置包括从其 表面依次从内到外设置的金属层、 胶木层、 金刚砂层。
7. 如权利要求 5所述的底盘车, 其特征在于, 所述摩擦装置是沿所述 离合片 (15 ) 的外边缘的纵向方向设置的槽。
8. 如权利要求 2所述的底盘车, 其特征在于, 所述弹性装置包括一端 连接于所述主动轴(16 )的动力输出端上而另一端连接于所述旋转体的至 少一个回位弹簧( 14 )。
9. 如权利要求 2所述的底盘车, 其特征在于, 所述弹性装置包括两端 都连接于所述旋转体的至少一个回位弹簧(14 )。
10. 如权利要求 1所述的底盘车, 其特征在于, 还包括可与所述丝杠 ( 4 )接合以推进或拉出所述动车架 (7 ) 的手动操作装置 (3 )。
11. 如权利要求 2所述的底盘车, 其特征在于, 所述接合装置 (13 ) 包括摩擦装置, 用于增加与所述旋转体的结合力。
12. 如权利要求 11所述的底盘车, 其特征在于, 所述摩擦装置包括从 其表面依次从内到外设置的金属层、 胶木层、 金刚砂层。
13. 如权利要求 11所述的底盘车, 其特征在于, 所述摩擦装置是沿所 述接合装置 (13 ) 的纵向方向设置的槽。
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US9438013B2 (en) 2014-03-05 2016-09-06 Eaton Corporation Drive assembly for an electrical switching apparatus racking assembly
US10250019B2 (en) 2014-03-05 2019-04-02 Eaton Intelligent Power Limited Motorized racking assembly including a current sensor and a torque sensor
US10777979B2 (en) 2014-03-05 2020-09-15 Eaton Intelligent Power Limited Motorized racking assembly having a drive assembly disposed in a space below and between housing assembly rails

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