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A digital hydraulic cylinder

A digital hydraulic and cylinder technology, applied in the field of hydraulic cylinders, can solve problems such as difficulty in controlling the displacement accuracy of piston rods, achieve the effects of reducing rotational friction and improving sealing performance

Active Publication Date: 2022-07-12
LIUPANSHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, the hydraulic pressure in the rod cavity and the rodless cavity is used to control the driving force of the piston rod, and it is difficult to control the displacement accuracy of the piston rod.

Method used

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  • A digital hydraulic cylinder
  • A digital hydraulic cylinder
  • A digital hydraulic cylinder

Examples

Experimental program
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Effect test

Embodiment 1

[0037] basically as attached figure 1 and attached figure 2 Shown: a digital hydraulic cylinder, including a cylinder body 12 and a driving member fixed on the cylinder body 12 by screws, the driving member is a servo motor 11, and a coupling that is rotatably connected to the cylinder body 12 is fixedly installed on the output shaft of the servo motor 11 The shaft 14 and the coupling 14 are fixedly connected with a connecting shaft 15 , and a ball bearing 16 is sleeved on the connecting shaft 15 , and the ball bearing 16 is fixedly connected with the cylinder block 12 .

[0038] A rotating shaft is slidably connected to the connecting shaft 15, and a piston seat 19 is threadedly connected to the rotating shaft. The piston seat 19 is connected to the cylinder 12 in a horizontal sliding connection. The piston seat 19 is sleeved with a sealing ring made of rubber material. A piston rod 20 sleeved on the rotating shaft is fixed with the screw on 19, and the piston rod 20 is thr...

Embodiment 2

[0054] The difference between the second embodiment and the first embodiment is as follows: image 3 As shown, this embodiment includes a mounting shell, the mounting shell includes an upper shell 31 and a lower shell, the upper shell 31 and the lower shell are fixedly connected by bolts, and the upper shell 31 and the lower shell form a cylindrical shape, and one end of the cylindrical shape is opened with a piston The through hole protruding from the rod 20, there is a gap between the through hole and the piston rod 20, the other end of the cylindrical shape has an opening, and also includes a cover plate 35 for closing the opening, the cover plate 35 and the upper shell 31 and the lower shell Both are fixedly connected, and a support member 36 is provided on the cover plate 35, and the support member 36 is made of vibration damping material.

[0055] In this embodiment, a sound insulation layer 32 is fixed in the upper shell 31 and the lower shell, an elastic layer 33 is ar...

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PUM

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Abstract

The invention relates to the technical field of hydraulic cylinders, and discloses a digital hydraulic cylinder, which comprises a cylinder body and a driving member mounted on the cylinder body. A connecting shaft is fixed on the output shaft of the driving member; A piston rod is coaxially threaded on the rotating shaft, a first pressure chamber is formed between one side of the piston rod and the cylinder body, and a second pressure chamber is formed between the other side of the piston rod and the cylinder body; it also includes an oil circuit system, An input module, a controller, a first sensor located in the first pressure chamber and a second pressure sensor located in the second pressure chamber. The invention is used for monitoring the stroke of the piston rod to determine the stroke of the piston rod, and uses hydraulic pressure to regulate the stroke of the piston rod, thereby improving the stroke precision of the piston rod.

Description

technical field [0001] The invention relates to the technical field of hydraulic cylinders, and specifically discloses a digital hydraulic cylinder. Background technique [0002] Digital hydraulic cylinder (full name: digital hydraulic servo cylinder). It has fully digital motion characteristics, that is, the frequency of electric pulses corresponds to the movement speed of the cylinder, and the number of electric pulses corresponds to the stroke of the cylinder. Digital hydraulic cylinder refers to the combination of stepper or servo motor, hydraulic slide valve, closed-loop position feedback design inside the hydraulic cylinder, connecting the hydraulic oil source, and all functions directly through the digital hydraulic cylinder controller or computer or programmable logic controller. (PLC) sends out digital pulse signals to complete the high-tech products of length vector control at different speeds. [0003] For example, Chinese Patent Bulletin No.: CN 207634434 U dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B15/14F15B15/20F15B15/28F15B21/08
CPCF15B15/1423F15B15/20F15B15/202F15B15/2838F15B21/08
Inventor 刘尧江伟
Owner LIUPANSHUI NORMAL UNIV
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