WO2004102010A1

WO2004102010A1 - A hydraulic intensifier electromotion cylinder

Info

Publication number: WO2004102010A1
Application number: PCT/CN2003/000701
Authority: WO
Inventors: Rang Jiao; Ju Jiao
Original assignee: Rang Jiao; Ju Jiao
Priority date: 2003-05-13
Filing date: 2003-08-21
Publication date: 2004-11-25
Also published as: AU2003255126A1

Abstract

This invention relates to a hydraulic intensifier electromotion cylinder, including a driving electromotor, a speed reducer, a spindle, a cylinder and an accumulator. The cylinder consists of a working cylinder and an intensifier cylinder, which are series and concentric. The piston rod of intensifier cylinder includes a bore that is disposed to allow the spindle to extend through. The intensifier rod inserts into working cylinder. The working cylinder's piston rod also includes a bore that is disposed to allow the intensifier rod to extend through and rotate. The front chamber of the working cylinder is connected to the back chamber of the intensifier cylinder and accumulator by oil way and valves. The back chamber of the working cylinder is connected to the front chamber of the intensifier cylinder by oil way. The hydraulic intensifier electromotion cylinder is integrally designed, so that it has impact structure, good stability, facile operation. More over compared with the same size electromotion cylinder, this invention's cylinder can output several decades times power. Because of the cushioning effect of hydraumatic, the shock caused at extreme position can be decreased significantly.

Description

液压增力电动叙技术领域 Hydraulic booster electric field

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。 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.

背景技术 Background technique

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。 In the past, in order to achieve the purpose of increasing the pressure or increasing the output force, a gas-liquid booster series and a liquid-one-liquid booster series cylinder were used. So far, there have been a variety of gas-liquid booster cylinders. And liquid-hydraulic booster cylinder put into use. Its common features are: using the energy provided by the air compressor and the hydraulic pump station to pressurize the low-pressure oil to a higher pressure in order to increase the output force, but its application is subject to the limitations of energy equipment and the cumbersome restrictions of pipeline installation. Not only does it limit its application, but also the output pressure has certain limitations, the equipment is relatively large, and the noise is high.

发明内容 Summary of the Invention

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***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。 Therefore, in view of the foregoing disadvantages of the existing booster cylinders, 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.

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。 In order to achieve the objective of the present invention, the present invention adopts the following technical scheme: 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. There is a booster booster in the booster booster cylinder. 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. During the fast-forward and fast-reverse strokes, 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.

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。 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.

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。 In order to reduce the area of the piston rod end of the supercharging and increasing speed rainbow to obtain a higher supercharging ratio, 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.

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。 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.

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。 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.

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: In order to obtain a higher output pressure, a larger boosting factor of ₅ can also further improve the hydraulic boosting electric action of the present invention as follows. In the communication oil path between the front cavity of the booster cylinder and the rear cavity of the working cylinder An induction valve is installed. 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. During the speed-up and fast-forward phase, 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. When the forward stroke is close or the same, the two pistons work. 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. When the pressure increases, 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. It is generally designed to be 8 ~ 15mm, and can also be specially designed according to user needs. Because the hydraulic booster electric cylinder of the present invention does not have an oil pump or an air pump, the working noise of the equipment is greatly reduced, the energy consumption during no-load is saved, and the environment protection is favorable. At the same time, according to the needs of the working conditions, it is convenient to realize computerized position control and force control, which is in line with the development direction of modern technology. The hydraulic booster electric cylinder of the present invention has the following characteristics:

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。 1. 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.

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***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。 2. Because the motor and screw are used to directly drive the piston, the hydraulic fluid is boosted. There is no need to use a hydraulic oil source system or an air source pump station device, which greatly reduces the working noise, saves energy consumption at no-load, and is good for environmental protection Advantage.

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。 3. Due to the use of a two-layer sleeve-type hydraulic pressure booster structure in series with the screw and the two pistons, the maximum effective stroke can be obtained within a certain installation length, saving installation space, and making the overall structure more compact. It has the characteristics of convenient use, stable work, high reliability, and easy operation and maintenance.

附图说明 BRIEF DESCRIPTION OF THE DRAWINGS

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。 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.

具体实施方式 detailed description

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。 The hydraulic booster electric cylinder of the present invention will be further described with reference to the drawings and specific embodiments. Step-by-step instructions to help understand the content of the present invention.

实施例 1 Example 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。 As shown in FIG. 1, 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. In the annular gap of the inner cylinder tube 5 and the outer cylinder tube 8, there is 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体 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. When the driving piston 25 is advanced, 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. At the same time, 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.

实施例 2 Example 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。 As shown in FIG. 2, 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.

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***，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。 Referring to FIG. 3, 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. In the phase, when the load changes, the oil pressure increases, and the pressure valve 43 automatically switches the working mode of the induction valve 34 and the function switching valve 39 under the pressure of the hydraulic oil, so that the The oil circuit is cut off, and at the same time, the function switching valve 39 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 and enters the boosting stage. At this time, the piston rod 9 of the supercharging and speed increasing cylinder under the action of the screw 4 continues to be inserted into the rear cavity of the working cylinder and the inner hole of the piston rod 15 of the working cylinder, so that the dead volume pressure in the rear cavity of the working cylinder increases. It can reach dozens to hundreds of times the original output force. If the end of the supercharging and accelerating piston rod 9 is perforated, The surface changes from a circle. The surface becomes a ring, its forward motion resistance is reduced, the boost ratio can be higher, and a larger output force can be obtained.

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。 When the motor 1 rotates in the reverse direction, 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. At this point, 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.

Claims

权利要求 Rights request

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。 1. A hydraulic booster electric cylinder comprising a drive motor, a reducer, a hydraulic cylinder and an accumulator, characterized in that: a lead screw is connected to the output shaft of the reducer and is driven by the drive motor through the reducer; the hydraulic cylinder It consists of a serial working cylinder and a booster cylinder. The work cylinder and the booster cylinder are installed concentrically. There is a booster piston in the booster cylinder. The piston rod of the booster piston is hollow, and The nut on the booster piston is inserted into the piston rod of the booster piston, and the booster piston rod extends into the working cylinder; the piston rod of the piston in the work cylinder has an inner hole, and the booster piston The 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 front cavity of the cylinder communicates with the rear cavity and accumulator of the booster cylinder through the oil circuit. The rear cavity of the working cylinder and the front cavity of the supercharging and speed increasing cylinder communicate with each other through an oil path.

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。 2. The hydraulic booster electric cylinder according to claim 1, characterized in that: the piston rod of the booster booster cylinder is a circular tube or an oval tube or a spline tube, and the front end of the tube is blocked by a nut.

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。 3. The hydraulic booster electric cylinder according to claim 2, characterized in that: the nut at the front end of the tube has a through hole, and the front end of the screw rod has a sealing element to improve the boosting ratio.

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。 4. The hydraulic booster electric cylinder according to claim 1, wherein: the nut on the booster piston rod is a ball screw nut or a trapezoidal screw nut, and the nut is fixed to the piston by a screw. on.

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。 5. The hydraulic booster electric cylinder according to claim 1, wherein the accumulator is located on a cylinder tube of the hydraulic booster electric cylinder.

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。 6. The hydraulic booster electric cylinder according to claim 1, characterized in that: the cylinder tube of the booster booster cylinder is composed of an outer cylinder tube and an inner cylinder tube which is concentrically sleeved in the outer cylinder tube, The accumulator is constituted by a nitrogen-filled ring-shaped sheath located in the annular gap between the outer cylinder and the inner cylinder.

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。 7. The hydraulic booster electric cylinder according to claim 1, characterized in that: an induction valve is installed on a communication oil path between the front cavity of the booster cylinder and the rear cavity of the work cylinder to increase the boost speed. The front cavity of the cylinder communicates with the communication oil path of the rear cavity of the booster cylinder and the front cavity 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.