WO2009074032A1 - An electric pushing device - Google Patents

An electric pushing device Download PDF

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Publication number
WO2009074032A1
WO2009074032A1 PCT/CN2008/072709 CN2008072709W WO2009074032A1 WO 2009074032 A1 WO2009074032 A1 WO 2009074032A1 CN 2008072709 W CN2008072709 W CN 2008072709W WO 2009074032 A1 WO2009074032 A1 WO 2009074032A1
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WO
WIPO (PCT)
Prior art keywords
permanent magnet
servo motor
screw rod
base
nut
Prior art date
Application number
PCT/CN2008/072709
Other languages
French (fr)
Chinese (zh)
Inventor
Chih-Shiang Han
Original Assignee
Lu, Hsaio-Ting
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Filing date
Publication date
Application filed by Lu, Hsaio-Ting filed Critical Lu, Hsaio-Ting
Publication of WO2009074032A1 publication Critical patent/WO2009074032A1/en

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Classifications

    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/64—Mould opening, closing or clamping devices
    • B29C45/66—Mould opening, closing or clamping devices mechanical
    • B29C45/661—Mould opening, closing or clamping devices mechanical using a toggle mechanism for mould clamping
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H2025/2062—Arrangements for driving the actuator
    • F16H2025/2075—Coaxial drive motors
    • F16H2025/2078—Coaxial drive motors the rotor being integrated with the nut or screw body

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

An electric pushing device includes a base, a screw rod (8) and a nut (9) which engages with the screw rod. The screw rod (8) extends through the base, and the front end of the screw rod (8) is a pushing end. An outer-rotor permanent magnet type servo motor is connected to the base, and the nut (9) is fixed to a rotor (3) of the motor.

Description

说 明 书  Description
电动顶推装置  Electric push device
(一） 技术领域 (1) Technical field
本发明涉及一种工程机械上所使用的电动顶推装置， 例如注塑 机、 千斤顶所使用的顶推装置。  The present invention relates to an electric pushing device used in a construction machine, such as an injection molding machine and a pushing device used in a jack.
(二） 背景技术 (2) Background technology
现有注塑机的顶推装置多为液压锁模机构， 采用液压油缸推动 机械机构， 完成模具的开合。  The pushing device of the existing injection molding machine is mostly a hydraulic clamping mechanism, and the hydraulic cylinder is used to push the mechanical mechanism to complete the opening and closing of the mold.
也有电动顶推装置应用在注塑机上如图 1所示， 外模板与合模 机械机构的连杆铰接， 在后模板上设置螺母， 丝杆与该螺母配合， 丝杆前端连接合模机械机构， 丝杆的后端通过皮带轮机构由电机带 动。丝杆在旋转过程中， 因螺母的推动， 产生前进或后退， 带动合模 机械机构动作。这种电动顶推装置的缺点是： 对丝杆的传动部分的结 构比较复杂， 需要对运动中的丝杆传递扭矩， 这就要开长键槽， 所 引起的摩擦消耗很大； 其次， 皮带轮传动方式不可避免有打滑现象， 不利于顶推进程的精确控制； 再次， 传动机构庞大复杂， 不够紧凑， 多级传动反而引起能源效率降低。  There is also an electric pushing device applied to the injection molding machine as shown in Fig. 1. The outer plate is hinged with the connecting rod of the clamping mechanism, and a nut is arranged on the rear plate. The screw rod is matched with the nut, and the front end of the screw is connected with the clamping mechanism. The rear end of the screw is driven by the motor through the pulley mechanism. During the rotation of the screw rod, due to the pushing of the nut, the forward or backward movement is generated, and the mechanical mechanism of the clamping mechanism is driven. The disadvantage of this electric pushing device is that the structure of the transmission part of the screw rod is relatively complicated, and it is necessary to transmit torque to the moving screw rod, which requires opening the keyway, and the friction caused by the screw is large; secondly, the pulley transmission The method is inevitably slippery, which is not conducive to the precise control of the jacking process; again, the transmission mechanism is large and complex, not compact enough, and the multi-stage transmission causes energy efficiency to decrease.
另一种电动顶推装置的结构形式如图 2所示： 后模板与合模机 械机构的连杆铰接， 在合模机械机构上安装螺母， 设置在后模板上 的丝杆与该螺母配合， 丝杆通过皮带轮传动机构由电动机带动。当丝 杆转动时螺母在丝杆上进退， 带动合模机械机构开模或合模。其缺点 是丝杆固定不动， 影响开模。为了合模需要将丝杆保持相当长度， 而 当开模时机械机构后退， 容易与丝杆前端抵触， 开模行程受限制， 不能做大件制品。此外， 传动机构复杂、能耗大、顶推精确度差、寿命 短的缺点也同样存在。 Another structural form of the electric pushing device is shown in FIG. 2: the rear plate is hinged with the connecting rod of the clamping mechanism, and a nut is mounted on the clamping mechanism, and the screw provided on the rear plate is matched with the nut. The lead screw is driven by the motor through the pulley drive mechanism. Silk When the rod rotates, the nut advances and retreats on the screw rod, and drives the mold clamping mechanism to open or close the mold. The disadvantage is that the screw is fixed and affects the mold opening. In order to clamp the mold, the screw rod needs to be kept at a considerable length, and when the mold is opened, the mechanical mechanism is retracted, and it is easy to resist the front end of the screw rod, and the mold opening stroke is restricted, and it is impossible to make a large product. In addition, the disadvantages of complicated transmission mechanism, high energy consumption, poor accuracy of pushing, and short life are also present.
(三） 发明内容 (3) Invention content
本发明要解决现有电动锁模装置机构复杂、 能效低、精确度差的 缺点， 提供一种结构紧凑、有利于精确控制和能效高的电动顶推装置。  The invention solves the defects of the complicated mechanism, low energy efficiency and poor precision of the prior electric clamping device, and provides an electric pushing device with compact structure, favorable precision control and high energy efficiency.
本发明所述的电动顶推装置包括基座， 丝杆穿设在基座上， 还 包括相互啮合的丝杆和螺母， 丝杆前端是顶推端， 其特征在于： 基 座上连接一外转子永磁式伺服电机， 所述的螺母固定在外转子永磁 式伺服电机的转子上。  The electric thrusting device of the present invention comprises a base, the screw rod is disposed on the base, and further comprises a screw rod and a nut which are engaged with each other, and the front end of the screw rod is a pushing end, wherein: the base is connected to the outer joint The rotor permanent magnet servo motor is fixed to the rotor of the outer rotor permanent magnet servo motor.
进一步， 所述的外转子永磁式伺服电机的转子通过圆锥滚子轴 承设置在基座上， 外转子永磁式伺服电机的转子与所述的螺母、丝杆 同轴布置， 外转子永磁式伺服电机的定子连接壳体， 壳体连接所述 的基座。  Further, the rotor of the outer rotor permanent magnet servo motor is disposed on the base through a tapered roller bearing, and the rotor of the outer rotor permanent magnet servo motor is coaxially arranged with the nut and the screw rod, and the outer rotor permanent magnet The stator of the servo motor is connected to the housing, and the housing is connected to the base.
当外转子永磁式伺服电机通电旋转时， 螺母旋转， 驱动丝杆前 进或后退， 完成顶推动作。  When the outer rotor permanent magnet servo motor is energized and rotated, the nut rotates, and the driving screw advances or retreats to complete the pushing action.
本发明结构紧凑、简便， 螺母直接与电机连接， 避免了传动级多 所引起的能源损耗， 提高能效比， 也有利于顶推进程的精确控制。  The invention has the advantages of compact structure and simple structure, and the nut is directly connected with the motor, thereby avoiding the energy loss caused by the transmission stage, improving the energy efficiency ratio, and also facilitating the precise control of the jacking process.
本发明的优点是： 结构紧凑、简便， 能效比高， 合模行程控制精 确。 The advantages of the invention are: compact structure, simple, high energy efficiency ratio, and clamping stroke control precision Indeed.
(四） 附图说明 (4) Description of the drawings
图 1是现有电动顶推装置的结构图。  1 is a structural view of a conventional electric thrust device.
图 2是另一现有电动顶推装置的结构图。  2 is a structural view of another conventional electric thrusting device.
图 3是本发明应用在注塑机上的结构示意图。  Figure 3 is a schematic view showing the structure of the present invention applied to an injection molding machine.
图 4是本发明应用在千斤顶上的结构示意图。  Figure 4 is a schematic view showing the structure of the present invention applied to a jack.
(五） 具体实施方式 (5) Specific implementation methods
实施例一 Embodiment 1
参照图 3 Refer to Figure 3
本实施例是本发明应用于注塑机上的电动锁模装置时的例子。 本发明所述的电动顶推装置包括基座， 丝杆传设在基座上， 还 包括相互啮合的丝杆和螺母， 丝杆前端是顶推端， 基座上连接一外 转子永磁式伺服电机， 所述的螺母固定在外转子永磁式伺服电机的 转子上。  This embodiment is an example in which the present invention is applied to an electric mold clamping device on an injection molding machine. The electric pushing device of the present invention comprises a base, the screw rod is disposed on the base, and further comprises a screw rod and a nut which are engaged with each other, the front end of the screw rod is a pushing end, and the outer rod is connected with an outer rotor permanent magnet type The servo motor is fixed to the rotor of the outer rotor permanent magnet servo motor.
所述的外转子永磁式伺服电机的转子通过圆锥滚子轴承设置在 基座上， 外转子永磁式伺服电机的转子与所述的螺母、丝杆同轴布置， 外转子永磁式伺服电机的定子连接壳体， 壳体连接所述的基座。  The rotor of the outer rotor permanent magnet servo motor is disposed on the base through a tapered roller bearing, and the rotor of the outer rotor permanent magnet servo motor is coaxially arranged with the nut and the screw rod, and the outer rotor permanent magnet servo The stator of the motor is coupled to the housing, and the housing is coupled to the base.
本实施例中本发明应用在电动锁模装置上， 后模板 10是基座。 该电动锁模装置包括合模机械机构， 所述的合模机械机构包括后模 板 10、 用于安装动模 17的移动模板 15和安装定模 18的前模板 16， 所述的移动模板 15和前模板 16可相对合拢和分开。 丝杆 8设置在所 述的后模板 10上， 丝杆 8前部连接所述的合模机械机构的十字车壁 14。 In the present embodiment, the present invention is applied to an electric clamping device, and the rear die plate 10 is a base. The electric clamping device includes a clamping mechanism, and the clamping mechanism includes a rear die plate 10, a moving die plate 15 for mounting the movable die 17, and a front die plate 16 for mounting the fixed die 18. The moving template 15 and the front template 16 can be relatively closed and separated. A lead screw 8 is disposed on the rear die plate 10, and a front portion of the screw bar 8 is coupled to the crossover wall 14 of the mold clamping mechanism.
后模板 10上装有外转子永磁式伺服电机， 所述的外转子永磁 式伺服电机的转子 3连接与所述的丝杆 8配合的螺母 9。 丝杆 8采用 滚珠丝杆， 螺母 9采用滚珠螺母。  The rear die plate 10 is provided with an outer rotor permanent magnet servo motor, and the rotor 3 of the outer rotor permanent magnet servo motor is connected to a nut 9 mated with the screw rod 8. The lead screw 8 is a ball screw and the nut 9 is a ball nut.
所述的外转子永磁式伺服电机的转子 3通过圆锥滚子轴承 2设 置在后模板 10上， 外转子永磁式伺服电机的转子 3与所述的螺母 9、 丝杆 8同轴布置， 外转子永磁式伺服电机的定子 6连接外壳 7， 外壳 7连接所述的后模板 10。  The rotor 3 of the outer rotor permanent magnet servo motor is disposed on the rear die plate 10 through the tapered roller bearing 2, and the rotor 3 of the outer rotor permanent magnet servo motor is coaxially arranged with the nut 9 and the screw rod 8. The stator 6 of the outer rotor permanent magnet servo motor is connected to the outer casing 7, and the outer casing 7 is connected to the rear die plate 10.
转子 3上装有磁铁 4， 硅钢片材质的定子 6上绕有线圈 5。 用于 安装圆锥滚子轴承 2的轴承座 1固定在后模板 10上。  A magnet 4 is mounted on the rotor 3, and a coil 5 is wound around the stator 6 made of a silicon steel sheet. The bearing housing 1 for mounting the tapered roller bearing 2 is fixed to the rear die plate 10.
后模板 10、 移动模板 15和前模板 16都套在水平拉杆上。  The rear template 10, the moving template 15 and the front template 16 are all placed on the horizontal tie rods.
所述的合模机械机构是曲肘连杆机构， 后模板 10上下对称地铰 接一对肘曲手 11的后端， 肘曲手 11的前端同时与曲手小连杆 12和 曲手大连杆 13的后端铰接， 两个曲手小连杆 12的另一端对称地铰 接在十字车壁 14两端， 两个曲手大连杆 13的前端对称地铰接在移 动模板 15上下端。  The clamping mechanism is a toggle linkage mechanism, and the rear template 10 hinges the rear end of the pair of elbows 11 symmetrically up and down. The front end of the elbow hand 11 simultaneously with the cranklet 12 and the curved hand Dalian The rear end of the rod 13 is hinged, and the other ends of the two curved small connecting rods 12 are symmetrically hinged at both ends of the crossover wall 14, and the front ends of the two curved large connecting rods 13 are symmetrically hinged at the upper and lower ends of the movable die plate 15.
转子 3与滚珠丝杆螺母 9固定在一起， 在锁模电机通上正电时， 从电机轴端看转子作顺时针方向转动， 因丝杆螺母 9只作转动， 丝 杆 8作平动， 这时丝杆 8将从轴端伸出。丝杆 8是与十字车壁 14做平 动， 此时十字车壁 14通过曲肘连杆机构带动活动模板 15沿着拉杆 19作平动而产生夹紧模具 17、 18的动作； 当在锁模电机通上负电时 转子做逆时针方向转动 （从电机轴端看） 。丝杆 8将从电机轴端缩入， 而丝杆带动十字车壁 14作平动， 此时十字车壁通过曲肘连杆机构带 动模板 15沿着拉杆 19做平动产生打开模具 17、 18的动作。 The rotor 3 and the ball screw nut 9 are fixed together. When the clamping motor is positively energized, the rotor rotates clockwise from the motor shaft end. Since the screw nut 9 only rotates, the screw 8 is translated. At this time, the screw 8 will protrude from the shaft end. The lead screw 8 is translated with the crossover wall 14, and the crossover wall 14 drives the movable template 15 along the drawbar through the toggle link mechanism. 19 acts as a translation to produce the clamping of the molds 17, 18; when the clamping motor is negatively charged, the rotor rotates counterclockwise (as viewed from the shaft end of the motor). The lead screw 8 will be retracted from the shaft end of the motor, and the lead screw drives the cross-car wall 14 to make a translation. At this time, the cross-car wall drives the die plate 15 to move along the tie rod 19 through the toggle link mechanism to open the mold 17, 18 Actions.
本发明丝杆驱动机构紧凑、简便， 螺母直接与外转子永磁式伺服 电机连接， 避免了传动级多所引起的能源损耗， 提高能效比， 也有 利于螺杆进程的精确控制。  The screw driving mechanism of the invention is compact and simple, and the nut is directly connected with the outer rotor permanent magnet servo motor, thereby avoiding the energy loss caused by the transmission stage, improving the energy efficiency ratio, and also facilitating the precise control of the screw process.
实施例二 Embodiment 2
参照图 5、 6： Refer to Figures 5 and 6:
本实施例与实施例一的区别是所应用的领域不同， 本实施例是 本发明应用在千斤顶上的例子。  The difference between this embodiment and the first embodiment is that the field of application is different. This embodiment is an example in which the present invention is applied to a jack.
本发明所述的电动顶推装置包括基座， 丝杆传设在基座上， 还 包括相互啮合的丝杆和螺母， 丝杆前端是顶推端， 基座上连接一外 转子永磁式伺服电机， 所述的螺母固定在外转子永磁式伺服电机的 转子上。  The electric pushing device of the present invention comprises a base, the screw rod is disposed on the base, and further comprises a screw rod and a nut which are engaged with each other, the front end of the screw rod is a pushing end, and the outer rod is connected with an outer rotor permanent magnet type The servo motor is fixed to the rotor of the outer rotor permanent magnet servo motor.
所述的外转子永磁式伺服电机的转子通过圆锥滚子轴承设置在 基座上， 外转子永磁式伺服电机的转子与所述的螺母、丝杆同轴布置， 外转子永磁式伺服电机的定子连接壳体， 壳体连接所述的基座。  The rotor of the outer rotor permanent magnet servo motor is disposed on the base through a tapered roller bearing, and the rotor of the outer rotor permanent magnet servo motor is coaxially arranged with the nut and the screw rod, and the outer rotor permanent magnet servo The stator of the motor is coupled to the housing, and the housing is coupled to the base.
将本发明应用在千斤顶上， 千斤顶底座 20和千斤顶上盖 21是 基座， 外转子永磁式伺服电机的壳体装在千斤顶底座 20上， 轴承座 1和圆锥滚子轴承 2装在千斤顶上盖 21上。  The invention is applied to a jack, the jack base 20 and the jack upper cover 21 are bases, and the outer rotor permanent magnet servo motor housing is mounted on the jack base 20, and the bearing housing 1 and the tapered roller bearing 2 are mounted on the jack. Cover 21 on.
当螺母 9在外转子永磁式伺服电机的定子带动下旋转时， 丝杆 向上做顶升。 当电机反向旋转时， 丝杆向下收拢。 When the nut 9 is rotated by the stator of the outer rotor permanent magnet servo motor, the screw Do the top up. When the motor rotates in the opposite direction, the lead screw is folded down.
本说明书实施例所述的内容仅仅是对发明构思的实现形式的列 举， 本发明的保护范围的不应当被视为仅限于实施例所陈述的具体 形式， 本发明的保护范围也及于本领域技术人员根据本发明构思所  The content described in the embodiments of the present specification is merely an enumeration of the implementation forms of the inventive concept, and the scope of the present invention should not be construed as being limited to the specific forms stated in the embodiments, and the scope of the present invention is also in the field. Technician according to the inventive concept

Claims

权 利 要 求 书 Claim
1、电动顶推装置， 包括基座， 丝杆穿设在基座上， 还包括相互 啮合的丝杆和螺母， 丝杆前端是顶推端， 其特征在于： 基座上连接 一外转子永磁式伺服电机， 所述的螺母固定在外转子永磁式伺服电 机的转子上。 1. The electric pushing device comprises a base, the screw rod is disposed on the base, and further comprises an intermeshing screw and a nut, wherein the front end of the screw rod is a pushing end, wherein: the outer connecting rotor is connected to the base The magnetic servo motor is fixed to the rotor of the outer rotor permanent magnet servo motor.
2、 如权利要求 1所述的电动顶推装置， 其特征在于： 所述的外 转子永磁式伺服电机的转子通过圆锥滚子轴承设置在基座上， 外转 子永磁式伺服电机的转子与所述的螺母、丝杆同轴布置， 外转子永磁 式伺服电机的定子连接壳体， 壳体连接所述的基座。  2. The electric thrusting device according to claim 1, wherein: the rotor of the outer rotor permanent magnet servo motor is disposed on the base through a tapered roller bearing, and the rotor of the outer rotor permanent magnet servo motor Arranged coaxially with the nut and the screw rod, the stator of the outer rotor permanent magnet servo motor is connected to the housing, and the housing is connected to the base.
PCT/CN2008/072709 2007-12-07 2008-10-16 An electric pushing device WO2009074032A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710164573.8 2007-12-07
CNA2007101645738A CN101453145A (en) 2007-12-07 2007-12-07 Electric pushing device

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WO2009074032A1 true WO2009074032A1 (en) 2009-06-18

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Cited By (3)

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WO2011088925A3 (en) * 2010-01-23 2012-02-23 Schaeffler Technologies Gmbh & Co. Kg Wind turbine having one or more rotor blades
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EP2891824A2 (en) 2013-10-29 2015-07-08 Perma gear GmbH Magnetische Antriebselemente Slider
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DE202014103629U1 (en) 2014-08-05 2014-09-18 Perma Gear Gmbh Magnetische Antriebselemente pusher

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