阅读说明：本技术 用于控制液压缸切换的装置 (Device for controlling switching of hydraulic cylinder ) 是由 德克·比彻 维尔纳·汉德尔 阿希姆·黑尔比希 克里斯托夫·伯斯 于 2018-08-01 设计创作，主要内容包括：根据本申请的装置是用于在快速运动阶段期间实现快速运动，在增力运动阶段期间实现增力运动的电动静液压驱动装置。该装置包括：由电动机(60)驱动的具有可变体积和/或转速的流体机(50)，用于提供液压流体的体积流；带有活塞腔(120)、杆腔(130)和柱塞杆(132)的第一气缸(100)；储存容器(200)；压力源(400)；安全阀(480)；止回阀(430)；活塞腔(120)和流体机(50)之间的流体连接件(125)；杆腔(130)和流体机(50)之间的流体连接件(135)；活塞腔(120)和储存容器(200)之间的流体连接件(125，236，235)；流体机(50)的杆腔侧端口与储存容器(200)之间的流体连接件(237、235)；储存容器(200)和压力源(400)之间的经由安全阀(480)的流体连接件。该装置的特征在于：安全阀(480)用于确保储存容器(200)的压力安全，止回阀(430)具有从压力源(400)到流体机(50)的杆腔侧端口的流体连接件；在快速运动阶段，液压流体的第一部分通过活塞腔(120)与流体机(50)之间的流体连接件(125)以及杆腔(130)和流体机(50)之间的流体连接件(135)进行输送，液压流体的第二部分通过活塞腔(120)和储存容器(200)之间的流体连接件(125、236、235)进行输送；在增力运动阶段，液压流体的第一部分通过活塞腔(120)与流体机(50)之间的流体连接件(125)以及杆腔(130)和流体机(50)之间的流体连接件(135)进行输送，液压流体的第二部分通过流体机(50)的杆腔侧端口和储存容器(200)之间的流体连接件(237、235)进行输送。(The device according to the application is an electro-hydrostatic drive for effecting a rapid movement during a rapid movement phase and a power movement during a power movement phase. The device includes: a fluid machine (50) driven by an electric motor (60) with a variable volume and/or rotational speed for providing a volumetric flow of hydraulic fluid; a first cylinder (100) with a piston chamber (120), a rod chamber (130) and a plunger rod (132); a storage container (200); a pressure source (400); a safety valve (480); a check valve (430); a fluid connection (125) between the piston chamber (120) and the fluid machine (50); a fluid connection (135) between the rod cavity (130) and the fluid machine (50); a fluid connection (125, 236, 235) between the piston chamber (120) and the storage container (200); a fluidic connection (237, 235) between a rod cavity side port of the fluidic machine (50) and the storage vessel (200); a fluid connection between the storage container (200) and the pressure source (400) via a safety valve (480). The device is characterized in that: a safety valve (480) for ensuring pressure safety of the storage vessel (200), the check valve (430) having a fluid connection from the pressure source (400) to a rod cavity side port of the fluid machine (50); during the rapid movement phase, a first part of the hydraulic fluid is delivered via a fluid connection (125) between the piston chamber (120) and the fluid machine (50) and a fluid connection (135) between the rod chamber (130) and the fluid machine (50), and a second part of the hydraulic fluid is delivered via a fluid connection (125, 236, 235) between the piston chamber (120) and the reservoir (200); during the power-increasing movement phase, a first portion of the hydraulic fluid is delivered via a fluid connection (125) between the piston chamber (120) and the fluid machine (50) and a fluid connection (135) between the rod chamber (130) and the fluid machine (50), and a second portion of the hydraulic fluid is delivered via a fluid connection (237, 235) between a rod chamber side port of the fluid machine (50) and the reservoir (200).)

1. An electro-hydrostatic drive (10) for carrying out a rapid movement in a rapid movement phase, a power movement in a power movement phase, and a switching phase between the rapid movement phase and the power movement phase, comprises

A fluid machine (50) having variable volume and/or variable speed driven by an electric motor (60) for providing a flow of hydraulic fluid,

a first cylinder (100) having a piston chamber (120), a rod chamber (130), and a rod (132),

a storage container (200) for storing a plurality of articles,

a pressure source (400),

a safety valve (480) is arranged on the inner wall of the container,

a check valve (430) for preventing the flow of gas,

a fluid connection (125) between the piston chamber (120) and a piston chamber side port of the fluid machine (50), a fluid connection (135) between the rod chamber (130) and a rod chamber side port of the fluid machine (50), a fluid connection (125, 236, 235) between the piston chamber (120) and the storage vessel (200), a fluid connection (237, 235) between the rod chamber side port of the fluid machine (50) and the storage vessel (200),

a fluid connection between the storage container (200) and the pressure source (400) via the safety valve (480),

it is characterized in that

The safety valve (480) is used to ensure pressure safety of the storage vessel (200), the non-return valve (430) has a fluid connection from the pressure source (400) to the rod chamber side port of the fluid machine (50), a first part of the hydraulic fluid flows through the fluid connection (125) between the piston chamber (120) and the piston chamber side port of the fluid machine (50) and the fluid connection (135) between the rod chamber (130) and the rod chamber side port of the fluid machine (50) during a rapid movement phase, a second part of the hydraulic fluid is delivered through the fluid connection (125, 236, 235) between the piston chamber (120) and the storage vessel (200),

in a power-increasing movement phase, a first portion of the hydraulic fluid flows through the fluid connection (125) between the piston chamber (120) and the piston chamber-side port of the fluid machine (50) and the fluid connection (135) between the rod chamber (130) and the rod chamber-side port of the fluid machine (50), and a second portion of the hydraulic fluid is delivered through the fluid connection (237, 235) between the rod chamber-side port of the fluid machine (50) and the reservoir vessel (200).

2. The electro-hydrostatic drive (10) of claim 1,

during the upward rapid movement, a first portion of the hydraulic fluid is delivered through the fluid connection (125) from the piston chamber (120) to the piston chamber side port of the fluid machine (50) and the fluid connection (135) from the rod chamber side port of the fluid machine (50) to the rod chamber (130), and a second portion of the hydraulic fluid is delivered through the fluid connection (125, 236, 235) from the piston chamber (120) to the storage vessel (200).

3. The electro-hydrostatic drive (10) of claim 1 or 2,

during the power-up movement, a first portion of the hydraulic fluid is delivered through the fluid connection (125) from the piston cavity (120) to the piston cavity side port of the fluid machine (50) and the fluid connection (135) from the rod cavity side port of the fluid machine (50) to the rod cavity (130), and a second portion of the hydraulic fluid is delivered through the fluid connection (237, 235) from the rod cavity side port of the fluid machine (50) to the storage vessel (200).

4. The electro-hydrostatic drive (10) of any of the preceding claims,

the outlet pressure of the safety valve 480 is between 5 and 50 bar, preferably between 15 and 30 bar.

5. The electro-hydrostatic drive (10) of any of the preceding claims,

the safety valve (480) is proportionally adjustable.

6. The electro-hydrostatic drive (10) of any of the preceding claims,

the storage container (200) is an accumulator.

7. The electro-hydrostatic drive (10) of claims 1-5,

the reservoir (200) has a plunger (210), a plunger cavity (250), a rod cavity (230), and a rod (232).

8. The electro-hydrostatic drive (10) of claim 7,

the rod (132) of the first cylinder (100) and the rod (232) of the second cylinder (200) are mechanically connected by a mass (500).

9. The electro-hydrostatic drive (10) of any of the preceding claims,

the drive device (10) has a first two-way control valve (310) and a second two-way control valve (320), each control valve having an 'open' and 'closed' state,

wherein the first valve (310) can open the fluid connection (237, 235) between the rod cavity side port of the fluid machine (50) and the storage vessel (200), the second valve (320) can open the fluid connection (125, 236, 235) between the piston cavity (120) and the storage vessel (200),

and wherein

In the rapid movement phase, the first valve (310) is in the "closed" state and the second valve (320) is in the "open" state,

during the energizing phase, the first valve (310) is in an "open" state and the second valve (320) is in a "closed" state.

10. The electro-hydrostatic drive (10) of any of the preceding claims,

the check valve (420, 430) has a fluid connection to a pressure source (400) to avoid cavitation in the fluid machine (50).

11. The electro-hydrostatic drive (10) of any of the preceding claims,

the additional check valve (440) has a fluid connection to a pressure source (400) to avoid cavitation in the storage container (200).

12. The electro-hydrostatic drive (10) of any of the preceding claims,

additional safety valves (450, 470) are used to ensure pressure safety of the two connections of the fluid machine (50).