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WO2004102010A1 - Verin electrique multiplicateur de pression hydraulique - Google Patents

Verin electrique multiplicateur de pression hydraulique Download PDF

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Publication number
WO2004102010A1
WO2004102010A1 PCT/CN2003/000701 CN0300701W WO2004102010A1 WO 2004102010 A1 WO2004102010 A1 WO 2004102010A1 CN 0300701 W CN0300701 W CN 0300701W WO 2004102010 A1 WO2004102010 A1 WO 2004102010A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
booster
piston
hydraulic
piston rod
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2003/000701
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English (en)
French (fr)
Inventor
Rang Jiao
Ju Jiao
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU2003255126A priority Critical patent/AU2003255126A1/en
Publication of WO2004102010A1 publication Critical patent/WO2004102010A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
    • F15B11/032—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force by means of fluid-pressure converters
    • F15B11/0325—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force by means of fluid-pressure converters the fluid-pressure converter increasing the working force after an approach stroke

Definitions

  • the invention belongs to the technical field of electric, mechanical and hydraulic integrated transmission, and particularly relates to a booster cylinder, which is an output of the electric cylinder that is tens of times higher than the original driving force by using the Pascal liquid booster principle. Pressure device.
  • the object of the present invention is to provide a hydraulic booster electric cylinder.
  • the motor drag screw provided by the present invention directly drives the piston to use the hydraulic booster boosting scheme It is not necessary to have a hydraulic system or an air source pumping station, and only the power supply can be used to directly increase the output force. It combines the advantages of electric drive and hydraulic booster in one, simple installation, easy to use, low cost and low noise.
  • the hydraulic booster electric cylinder includes a driving motor, a reducer, a hydraulic cylinder and an accumulator, and a lead screw and a reducer.
  • the output shaft is connected and driven by a drive motor through a reducer.
  • the hydraulic cylinder is composed of a series working cylinder and a booster booster cylinder.
  • the work cylinder and the booster booster are installed concentrically.
  • Piston 5 The piston rod of the booster piston is hollow.
  • the lead screw is threaded into the piston rod of the booster piston through the nut on the booster piston.
  • the booster piston rod extends into the working cylinder;
  • the piston rod of the piston has an inner hole, and the booster piston rod can extend into the inner hole of the piston rod of the cylinder and can move in the inner hole of the piston rod of the cylinder.
  • the rear cavity of the pressure increasing cylinder and the accumulator communicate with each other, and the rear cavity of the working cylinder communicates with the front cavity of the supercharging speed increasing cylinder through an oil path.
  • the drive motor drives the lead screw to rotate through the reducer.
  • the lead screw makes the piston of the supercharged speed increasing rainbow move forward or backward linearly.
  • the oil in the supercharging and increasing speed cylinder enters the working cylinder to push the piston of the working cylinder back and forth.
  • the two pistons move synchronously to achieve the purpose of speed increase.
  • the oil in the front cavity of the working cylinder is returned to the cavity through the oil passage to increase the oil in the rear cavity after the accelerating and accelerating, and the accumulator supplements the phase difference oil caused by the volume difference between the piston rod and the screw of the working cylinder.
  • the piston rod of the pressure-increasing and speed-increasing rainbow may be a circular tube or an oval tube, or a spline tube, and the front end of the tube is blocked by a nut.
  • a nut at the front end of the piston rod of the supercharging and increasing speed can be punched with a through hole, correspondingly in the wire.
  • a sealing element such as a sealing ring is installed at the front end of the lever to obtain 70 times the output pressure.
  • the nut on the booster piston can be a ball screw nut or a ladder screw nut, and the nut is fixed on the piston by screws.
  • the accumulator can be installed and fixed on the cylinder of the hydraulic booster electric cylinder.
  • the cylinder of the supercharging and speed-increasing cylinder can be composed of an outer cylinder and a concentric sleeve.
  • the accumulator is composed of an inner cylinder tube in an outer cylinder tube, and the accumulator is composed of a nitrogen-filled ring-shaped leather jacket located in an annular gap between the outer cylinder tube and the inner cylinder tube.
  • a larger boosting factor of 5 can also further improve the hydraulic boosting electric action of the present invention as follows.
  • An induction valve is installed in the communication oil path between the front cavity of the booster cylinder and the rear cavity of the working cylinder.
  • the front cavity of the booster cylinder is connected to the rear oil chamber of the booster cylinder and the front oil chamber of the working cylinder through an oil circuit and a function switching valve.
  • a pressure valve is connected to the above-mentioned Function switching valve and induction valve are connected.
  • the oil in the booster speed-up cylinder enters the cavity of the working cylinder through the oil circuit and the induction valve to push the piston rod of the working cylinder.
  • the force output by the piston rod of the cylinder is about the force of the driving nut of the lead screw, and the speeds of the two are also basically the same or similar; when fast-forwarding to the working position, the oil pressure in the cylinder rises due to the larger working load, and the stroke At any position, the oil pressure increases when the load changes.
  • the pressure valve switches the induction and function switching valve under the effect of the induction pressure to cut off the oil circuit between the front cavity of the booster cylinder and the back cavity of the working rainbow.
  • the switching valve conducts the oil passages of the front cavity of the working cylinder, the rear cavity of the booster cylinder and the front cavity of the booster cylinder, so that the oil in the front cavity of the booster cylinder is returned to the rear chamber.
  • the cylinder enters the boost phase. Because the oil passage of the cavity is closed after the piston of the working cylinder, the booster piston rod is continuously fed forward by the screw, which makes the dead volume of the cavity increase.
  • the working cylinder The piston rod increases the output force and overcomes the load, so that the piston continues to feed forward until the pressure in the cylinder reaches the set value set by the user according to the work needs or the rear piston advances to the end of the stroke.
  • the size of the boosting stroke depends on the volume of the rear piston rod entering the front cavity.
  • the hydraulic booster electric cylinder of the present invention has the following characteristics:
  • the present invention uses a motor to directly drive the lead screw piston in a tandem sleeve design, and then the piston pushes the oil to generate a boosting effect to complete the fast forward, fast reverse stroke and automatically adapt to the load and convert it into a hydraulic boost stroke .
  • the entire working process does not need to rely on external signal control.
  • the automatic load sensing conversion integrates the advantages of electric drive and hydraulic booster, which is the unique creation of this utility model.
  • FIG. 1 is a structural diagram of an embodiment of a hydraulic booster electric cylinder of the present invention
  • FIG. 2 is a structural diagram of another modification of the hydraulic booster electric cylinder of the present invention
  • FIG. 3 is a hydraulic booster shown in FIG. 2 Schematic of electric cylinder.
  • the body of the hydraulic booster electric cylinder in this embodiment is composed of a working cylinder barrel 13, a booster cylinder, a middle seat 11, a front cylinder head 17 and a rear seat 3.
  • the working cylinder barrel 13 It is installed concentrically with the booster booster cylinder.
  • the working cylinder barrel 13 and the booster booster cylinder tube are connected in series through the front cylinder head 17, the rear seat 3 and the tie rod 18.
  • the booster cylinder is composed of a concentric inner cylinder 5 and an outer cylinder 8.
  • an accumulator 6 composed of a nitrogen gas-filled gas cylinder 7.
  • the piston rod 15 of the working cylinder piston 14 in the working cylinder has an internal hole 16, forming a hollow sleeve piston rod.
  • the piston pestle 15 passes through the front cylinder head 17, and the sealing ring 19 is sealed between the piston rod 15 and the front hood 17. .
  • the center of the piston 25 in the booster cylinder is a trapezoidal screw nut 26, and the nut 26 is fixed to the booster and booster rainbow piston 25 by screws.
  • the piston rod 9 of the supercharging and speed increasing piston 25 is a circular tube, which is connected and fixed to the piston 25 by a nut. The end of the piston rod 9 is sealed with a bolt 29 to form a sleeve piston.
  • the piston rod 9 of the supercharging and speed increasing rainbow passes through the intermediate seat 11 and is inserted into the inner hole 16 of the piston rod 15 of the working cylinder and can reciprocate linearly in the inner hole 16.
  • An oil hole 12 is formed in the middle seat 11 to connect the front cavity 24 of the booster cylinder and the rear cavity 23 of the working cylinder so that the hydraulic oil in the front cavity 24 of the booster cylinder can enter the rear cavity of the working cylinder ⁇ 23.
  • the front cavity 21 of the working cylinder communicates with the rear cavity 27 of the booster cylinder through the joint 20, the oil pipe 22, and the oil hole 28.
  • the accumulator 6 communicates with the rear cavity 27 of the booster cylinder through the oil circuit. To replenish the required hydraulic fluid.
  • the lead screw 4 is inserted into the nut 26 and the piston rod 9 of the booster cylinder.
  • a seal ring 10 is mounted at the front end of the lead screw 4.
  • the motor 1 drives the lead screw 4 through a speed reducer 2.
  • the motor 1 drives the lead screw 3 to rotate the lead screw 3 through the reducer 2, and the lead screw 3 pushes the piston 25 forward or backward through the piston nut 26.
  • the piston 25 squeezes the hydraulic oil in the front cavity 24 of the booster cylinder through the oil hole 12 in the middle seat 11 and enters the rear cavity 23 of the working cylinder, pushing the working cylinder piston 14 forward. Achieve speed increase and boost pressure.
  • the hydraulic oil in the front cavity 21 of the working cylinder enters the rear cavity 27 of the booster cylinder through the oil pipe 22 to supplement the vacuum caused by the front of the piston 25. Since the diameter of the screw 3 is smaller than the diameter of the piston rod 15 of the working cylinder, excess hydraulic oil will enter the accumulator 6. In this way, the boost ratio is not high, but the entire stroke achieves the purpose of increasing the output force.
  • the electric motor 1 drives the screw 3 to perform two-stage torque amplification and one-stage hydraulic amplification. In this working mode, the accumulator 6 can be used to hold pressure for a long time. During the hold time, because the reducer 2 and the like have a self-locking function, the motor 1 can be powered off. A lot of energy consumption.
  • the rainbow body of the hydraulic booster electric cylinder in this embodiment is composed of a working cylinder barrel 13, a booster cylinder 32, a middle seat 11, a front cylinder head 17 and a rear seat 3.
  • the cylinder 13 is installed concentrically with the supercharged speed increasing rainbow tube 32, and the working cylinder 13 and the supercharged speed increasing rainbow tube 32 are connected in series through the front cylinder head 17, the rear seat 3 and the tie rod 18.
  • the piston rod 15 of the piston 14 in the working cylinder has an inner hole to form a hollow piston rod.
  • the piston pestle 15 passes through the front cylinder head 17, and a sealing ring 19 is sealed between the piston 15 and the front cylinder head 17.
  • the piston 14 has a front pressure plate 36.
  • the center of the piston in the booster cylinder is a ball screw nut 26, and the nut 26 is fixed to the piston by a screw.
  • the piston rod 9 of the supercharging and speed increasing piston has an inner hole, and the piston rod 9 is fixedly connected to the piston through a nut 41.
  • the piston rod 9 of the supercharged and increased speed rainbow passes through
  • the intermediate seat 11 is inserted into the inner hole of the piston rod 15 of the working cylinder and can make a reciprocating linear motion in the inner hole.
  • There is an oil hole in the middle seat 11 to connect the front cavity of the booster booster and the rear cavity of the working cylinder, so that the hydraulic oil in the front cavity of the booster booster cylinder can enter the rear cavity of the work cylinder.
  • An induction valve 34 is installed on the oil circuit to switch the working mode.
  • the intermediate seat 11 also has an intermediate pressure plate 40.
  • the front cavity of the working cylinder is connected with the rear cavity and the front cavity of the booster cylinder through the joint 20, the three-way pipe 38 and the function switching valve 39.
  • the accumulator 6 The oil passage communicates with the rear cavity of the booster cylinder, and the accumulator 6 is installed outside the cylinder through the accumulator seats 31 and 33.
  • the lead screw 4 is connected to the output shaft of the reducer 2 through a key 48.
  • the lead screw 4 is inserted into the nut 26 and the piston rod of the booster cylinder.
  • a sealing ring 10 is installed at the front end of the lead screw 4.
  • the motor 1 drives the lead screw 4 through a speed reducer 2.
  • the working principle of the hydraulic booster electric cylinder in this embodiment is shown as follows:
  • the motor 1 drives the lead screw 4 to rotate the lead screw 4 through the reducer 2, and the lead screw 4 rotates through the pressure increasing and increasing piston nut 26
  • the moment is amplified and converted into the driving force for the piston, causing the piston to slide forward.
  • the hydraulic oil in the front cavity of the booster and booster piston is pressed into the rear cavity of the working cymbal to move the cylinder piston 15 forward. This stage is the speed increase.
  • the lead screw 4 drives the supercharged and increased speed rainbow piston to move backward, and the oil in the cavity behind the supercharged and increased speed cylinder flows back to the front cavity of the working cylinder under the squeeze of the piston.
  • the working cylinder piston is moved backward under the pressure of the oil.
  • the induction pressure valve has returned, and the oil in the cavity behind the working cylinder flows back to the front cavity of the booster cylinder through the induction valve.
  • This stroke is a fast-reverse stroke, the retraction force is the same as the output force during fast-forward, and the speed is also the same.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Description

液压增力电动叙 技术领域
本发明属于电气、 机械、 液压一体化传动技术领域， 具体来说涉 及的是一种增压缸，是一种利用帕斯卡液体增压原理使电动缸高于原 有驱动力的数十倍的输出压力的装置。
背景技术
以前为达到增加压力或增加输出力的目的，一^ &采用气——液增 力串联虹和液一一液增力串联缸的方式，到目前为止已有多种气一一 液增压缸和液——液增压缸投入使用。 其共同特点是： 利用空压机和 液压泵站提供的能源将低压油液增压到较高压力， 以达到增加输出 力， 但其在应用时受到能源设备的局限和管路安装的烦琐限制， 不但 使其应用受到限制，而且输出压力也有一定的局限性 ,设备也比较大， 噪音高。
发明内容
因此，针对现有的增压缸的上述缺点， 本发明的目的在于提供一 种液压增力电动缸，本发明提出的电机拖动丝杠直接驱动活塞利用油 液增压的增力的新方案， 无须具备液压系统或气源泵站， 仅须电源供 电即可直接达到增加输出力的目的。它集电气驱动和液压增力的优势 于一体， 安装简便， 易于使用， 成本低、 噪音小。
为了实现本发明的目^ , 本发明采用如下技术方案: 液压增力电 动缸包括一个驱动电机、 减速器、 液压缸及蓄能器， 丝杠与减速器的 输出轴连接并通过减速器被驱动电机驱动，液压缸由串联的工作缸及 增压增速缸构成， 工作缸与增压增速紅同心安装， 在增压增速缸内有 增压增速活塞 5 增压增速活塞的活塞杆中空， 丝杠通过增压增速活塞 上的螺母穿在增压增速活塞的活塞杆内，增压增速活塞杆伸入工作缸 内； 工作缸内的活塞的活塞杆有内孔, 增压增速活塞杆能够伸入工作 缸活塞杆的内孔内并可在工作缸活塞杆的内孔内运动；工作缸的前腔 体通过油路与增压增速缸的后腔体及蓄能器连通，工作缸的后腔体与 增压增速釭的前腔体通过油路连通。驱动电机通过减速器驱动丝杠转 动， 丝杠使增压增速虹的活塞作向前或向后的直线运动， 增压增速缸 内的油液进入工作缸推动工作缸活塞往复直线运动， 快进、快退行程 时两个活塞同步运动， 实现增速目的。 工作缸前腔体内的油通过油路 回到增压增速 后腔体补充后腔体内的油，蓄能器补充由于工作缸活 塞杆及丝杠的体积差造成的相差的油液。
所述的增压增速虹的活塞杆可以为一个圆管或椭圆管，还可为花 键管， 管前端通过一个螺母堵死。
为了减少增压增速虹的活塞杆端面积， 以获得更高的增压比， 在 所述的增压增速鉦的活塞杆的前端的螺母上可以打有一个通孔，相应 的在丝杠前端安装密封环等密封元件，这样可获得 70倍的输出压力。
所述的增压增速活塞杆上的螺母可以为一个滚珠丝杠螺母或梯 形丝杠螺母， 螺母通过螺钉被固定在活塞上。
所述的蓄能器可以安装固定在上述的液压增力电动缸的缸筒上。 所述的增压增速缸的缸筒可以由一个外缸筒及一个同心的套在 外缸筒内的内缸筒組成，所述的蓄能器为位于上述的外缸筒及内缸筒 之间的环隙内的充氮气的环形皮嚢构成。
为了获得较高的输出压力， 得到较大的增压倍数 5 还可以对本发 明的液压增力电动 作如下进一步的改进，在增压增速缸前腔体与工 作缸后腔体的连通油路上安装有感应阀，增压增速缸前腔体通过油路 及一个功能转换阀与增压增速缸的后腔体及工作缸的前腔体的连通 油路相通， 一个压力阀与上述的功能转换阀及感应阀连接。在增速快 进阶段，增压增速缸内的油通过油路及感应阀进入工作缸后腔体内推 动工作缸的活塞杆运动，快进行程时由于前后两个活塞大小相近或相 同， 工作缸活塞杆输出的力约为丝杠的驱动螺母的力， 两者速度也基 本相同或相近； 当快进到工作位置时， 由于工作负载变大， 缸内的油 液压力升高， 在行程中任意位置， 受到负载变化时油液压力增加， 压 力阀在感应压力作用下切换感应阔及功能转换阀，使增压增速缸前腔 体与工作虹后腔体的油路切断， 同时功能转换阀将工作缸前腔体、增 压增速缸后腔体及增压增速缸前腔体油路导通，使增压增速缸前腔体 内的油液回流至后腔体， 工作缸进入增压阶段。 由于工作缸活塞后腔 体油液通道被闭死， 增压增速活塞杆在丝杠的驱动下又不断向前进 给， 使得腔内闭死容积压力升高， 当压力升高后， 工作缸活塞杆增加 输出力， 克服了负载， 使活塞继续向前进给， 直到缸内压力达到用户 根据工作需要设定的设定值或后活塞前进到行程终点。增力行程的大 小取决于后活塞杆进入前腔体积多少， 一般设计为 8~15mm, 也可根 据用户需要特殊设计。 本发明的液压增力电动缸由于没有油泵、 气泵的工作，使设备工 作噪音大大降低， 节省空载时能源的耗费， 利于环保。 同时又可根据 工况需要， 便于实现计算机数字化的位置控制和力控制， 符合现代技 术的发展方向。 本发明的液压增力电动缸有如下特点:
1. 本发明采用一个电机直接驱动丝杠活塞串联套筒式设计 , 再 由活塞推动油液使其产生增力作用， 来完成快进、快退行程和自动适 应负载转换为油压增力行程。 整个工作过程无须依靠外来的信号控 制， 负载自动感应转换集电气驱动和液压增力优势于一体，是本实用 新型的独到创建。
2. 由于采用电动机、 丝杠直接驱动活塞， 推动油液产生增力作 用， 无须用液压油源系统或气源泵站装置， 使工作噪音大大降低， 节 省空载时能源的耗费、 利于环保等优势。
3. 由于采用丝杠与两活塞前后串联两层套筒式的液压增压结构， 在一定的安装长度内可获得最大有效行程， 节约安装空间， 使整体结 构更加紧凑。 具有使用方便、 工作稳定、 可靠性高、 易于操作维护等 特点。
附图说明
图 1为本发明的一种液压增力电动缸的实施方式结构图； 图 2为本发明的液压增力电动缸另一种改进方式的结构图； 图 3为图 2所示的液压增力电动缸的原理图。
具体实施方式
下面结合附图和具体实施例对本发明的液压增力电动缸作进一 步说明， 以助于理解本发明的内容。
实施例 1
如图 1所示，本实施例中的液压增力电动缸的 体由一个工作缸 筒 13、 增压增速鉦筒、 中间座 11、 前缸盖 17及后座 3组成， 工作缸 筒 13与增压增速虹筒同心安装， 通过前缸盖 17、 后座 3及拉杆 18 把工作缸筒 13和增压增速缸筒串联安装起来。 增压增速缸筒由一个 同心的内缸筒 5和外缸筒 8组合成。在内缸筒 5及外缸筒 8的环隙内 有充氮气的气嚢 7构成的蓄能器 6。 工作缸内的工作缸活塞 14的活 塞杆 15有内孔 16, 形成中空的套筒式活塞杆， 活塞杵 15穿过前缸 盖 17， 活塞杆 15与前虹盖 17间有密封圈 19密封。 增压增速缸内的 活塞 25中心有梯形丝杠螺母 26， 螺母 26通过螺钉被固定在增压增 速虹活塞 25上。增压增速叙活塞 25的活塞杆 9为一根圆管， 通过螺 母与活塞 25连接固定， 在活塞杆 9端部通过一个螺栓 29将活塞杆 9 端部密封住， 形成套筒式活塞。 增压增速虹的活塞杆 9 穿过中间座 11后插在工作缸的活塞杆 15的内孔 16内并可在内孔 16内作往复直 线运动。 中间座 11上有油孔 12将增压增速缸的前腔体 24与工作缸 的后腔体 23连通起来，使增压增速缸前腔体 24内的液压油可以进入 工作缸后腔体 23。 工作缸的前腔体 21通过接头 20、 油管 22、 油孔 28与增压增速缸的后腔体 27连通起来， 蓄能器 6通过油路与增压增 速缸的后腔体 27连通， 以补充所需液压油。 丝杠 4穿在增压增速缸 的螺母 26及活塞杆 9内， 丝杠 4前端安装有密封环 10。 电机 1通过 减速器 2驱动丝杠 4。 电机 1通过减速器 2驱动丝杠 3使丝杠 3转动，丝杠 3通过活塞 螺母 26推动活塞 25前进或后退。 当驱动活塞 25前进时， 活塞 25挤 压增压增速缸前腔体 24内的液压油通过中间座 11上的油孔 12进入 工作缸后腔体 23 , 推动工作缸活塞 14向前移动， 实现增速及增压目' 的。同时工作缸前腔体 21内的液压油通过油管 22进入增压增速缸的 后腔体 27内 , 补充由于活塞 25前近造成的真空。 由于丝杠 3的直径 小于工作缸的活塞杆 15的直径， 所以多余的液压油将进入蓄能器 6。 此方式增压比不高， 但整个行程达到增加输出力的目的， 既电动 1驱 动丝杠 3进行两级力矩放大和一级液压放大。此工作方式由于利用蓄 能器 6可进行长时间保压，在保压时间内由于减速器 2等具有自锁功 能， 电机 1可断电， 利用蓄能器 6的作用实现保压， 可节约大量的能 源消耗。
实施例 2
如图 2所示，本实施例中的液压增力电动缸的虹体由一个工作缸 筒 13、 增压增速缸筒 32、 中间座 11、 前缸盖 17及后座 3组成， 工 作缸筒 13与增压增速虹筒 32同心安装， 通过前缸盖 17、 后座 3及 拉杆 18把工作缸筒 13和增压增速虹筒 32串联安装起来。 工作缸内 的活塞 14的活塞杆 15有内孔， 形成中空的活塞杆， 活塞杵 15穿过 前缸盖 17, 活塞 15与前缸盖 17间有密封圈 19密封。 活塞 14上 有前压板 36。 增压增速缸内的活塞中心有滚珠丝杠螺母 26, 螺母 26 通过螺钉被固定在活塞上。增压增速活塞的活塞杆 9有一个内孔， 活 塞杆 9通过螺母 41与活塞连接固定。 增压增速虹的活塞杆 9穿过中 间座 11后插在工作缸的活塞杆 15的内孔内并可在内孔内作往复直线 运动。 中间座 11上有油孔将增压增速虹的前腔体与工作缸的后腔体 连通起来， 使增压增速缸前腔体内的液压油可以进入工作缸后腔体， 在油孔的油路上安装有感应阀 34, 以切换工作方式。 中间座 11上还 有中压板 40， 工作缸的前腔体通过接头 20、三通管 38及功能转换阀 39与增压增速缸的后腔体及前腔体连通起来， 蓄能器 6通过油路与 增压增速缸的后腔体连通，蓄能器 6通过蓄能器座 31及 33安装在缸 体外面。 丝杠 4通过键 48与减速器 2的输出轴联接， 丝杠 4穿在增 压增速缸的螺母 26及活塞杆内， 丝杠 4前端安装有密封环 10。 电机 1通过减速器 2驱动丝杠 4。
参考图 3 , 所示本实施例中的液压增力电动缸的工作原理如下： 电机 1通过减速器 2驱动丝杠 4使丝杠 4转动，丝杠 4通过增压增速 活塞螺母 26将转矩放大并转化为对活塞的推动力，使活塞向前滑动， 增压增速活塞前腔体内的液压油压入工作鉦的后腔体内使工作缸活 塞 15向前运动， 此阶段为增速阶段， 当负载变化时油液压力增加， 压力阀 43在液压油压力作用下自动切换感应阔 34及功能转换阀 39 的工作方式， 使增压增速缸前腔体与工作缸后腔体的油路切断， 同时 功能转换阀 39将工作缸前腔体、 增压增速缸后腔体及增压增速虹前 腔体油路导通， 进入增压阶段。 此时在丝杠 4作用下增压增速缸的活 塞杆 9继续向工作缸的后腔体及工作缸活塞杆 15内孔内插入， 使得 工作缸的后腔体内闭死容积压力升高，达到原有输出力数十倍至上百 倍的力量。 如果将增压增速活塞杆 9的端部穿孔后， 由于活塞杆 9端 面由一个圆.面变为一个圆环，其向前运动阻力减少，增压比可以更高， 可以获得更大的输出力。
在电机 1反向转动时， 丝杠 4驱增压增速虹活塞向后运动， 增压 增速缸后腔体内的油液在活塞的挤压下通过反流回工作缸的前腔体， 使工作缸活塞在油液的压力作用下向后运动。 此时, 感应压力阀已回 位 , 工作缸后腔体内的油液通过感应阀流回到增压增速缸前腔体。 该 行程为快退行程， 回退力与快进时输出力相同， 速度也相同。

Claims

权 利 要 求
1、 一种液压增力电动缸， 包括一个驱动电机、 减速器、 液压缸 及蓄能器， 其特征在于： 一个丝杠与减速器的输出轴连接并通过减速 器被驱动电机驱动； 液压缸由串联的工作缸及增压增速缸构成， 工作 缸与增压增速缸同心安装， 在增压增速缸内有增压增速活塞， 增压增 速活塞的活塞杆中空，丝扛通过增压增速活塞上的螺母穿在增压增速 活塞的活塞杆内， 增压增速活塞杆伸入工作缸内； 工作缸内的活塞的 活塞杆有内孔，增压增速活塞杆能够伸入工作缸活塞杆的内孔内并可 在工作缸活塞杆的内孔内运动；工作缸的前腔体通过油路与增压增速 缸的后腔体及蓄能器连通，工作缸的后腔体与增压增速缸的前腔体通 过油路连通。
2、 如权利要求 1所述的液压增力电动缸， 其特征在于： 所述的 增压增速缸的活塞杆为一个圆管或椭圆管、花键管， 管前端通过一个 螺母堵死。
3、 如权利要求 2所述的液压增力电动缸， 其特征在于： 所述的 管前端的螺母上有通孔， 丝杆的前端有密封元件， 以提高增压比。
4、 如权利要求 1所述的液压增力电动缸， 其特征在于： 所述的 增压增速活塞杆上的螺母为一个滚珠丝杠螺母或梯形丝杠螺母 ,螺母 通过螺钉被固定在活塞上。
5、 如权利要求 1所述的液压增力电动缸, 其特征在于: 所述的 蓄能器位于上述的液压增力电动缸的缸筒上。
6、 如权利要求 1所述的液压增力电动缸， 其特征在于： 所述的 增压增速缸的缸筒由一个外缸筒及一个同心的套在外缸筒内的内缸 筒组成，所述的蓄能器为位于上述的外缸筒及内缸筒之间的环隙内的 充氮气的环形皮嚢构成。
7、 如权利要求 1所述的液压增力电动缸, 其特征在于： 在所述 的增压增速缸前腔体与工作缸后腔体的连通油路上安装有感应阀，增 压增速缸前腔体通过油路及一个功能转换阀与增压增速缸的后腔体 及工作缸的前腔体的连通油路相通，一个压力阀与上述的功能转换阀 及感应阀连接。
PCT/CN2003/000701 2003-05-13 2003-08-21 Verin electrique multiplicateur de pression hydraulique Ceased WO2004102010A1 (fr)

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EP3581808A1 (en) * 2009-01-30 2019-12-18 Fisher Controls International Llc Adjustable piston actuator
US12416316B2 (en) 2023-07-10 2025-09-16 Doben Limited Hydraulic cylinder and system with pressure intensification

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Publication number Priority date Publication date Assignee Title
WO2010051913A1 (de) * 2008-11-08 2010-05-14 Robert Bosch Gmbh Hydraulischer kraftübersetzer
EP3581808A1 (en) * 2009-01-30 2019-12-18 Fisher Controls International Llc Adjustable piston actuator
US12416316B2 (en) 2023-07-10 2025-09-16 Doben Limited Hydraulic cylinder and system with pressure intensification

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