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Buffering closing hydraulic cylinder

A technology of hydraulic cylinders and cylinder blocks, applied in the field of hydraulic cylinders, can solve the problems of lack of buffering effect, large braking force, poor buffering effect, etc., and achieve the effects of being difficult to operate, meeting controllability and high reliability requirements.

Pending Publication Date: 2019-04-09
CSIC ZHONGNAN EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to structural limitations, the cushioning effect of this type of device is poor, and the braking force at the beginning of the cushioning is very large, but it quickly decreases, and the cushioning effect cannot be achieved.

Method used

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  • Buffering closing hydraulic cylinder
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  • Buffering closing hydraulic cylinder

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Embodiment Construction

[0045] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0046] This embodiment provides a slow closing hydraulic cylinder, see the attached figure 1 , including: cylinder 1, piston rod 2, spacer 3, sleeve 4, one-way valve 5, screw rod 6, rear end cover 7, displacement sensor 9, front end cover 10, nut 14, piston 18, quick adjustment screw 11 and slow adjustment screw 12;

[0047] The cylinder body 1 is a cylindrical body with openings at both ends, and an oil port A8 communicating with its inner cavity is provided on the outer peripheral surface of one end;

[0048] The piston rod 2 is processed with a blind hole along its axial direction;

[0049] The spacer 3 is a cylinder with an open end and a central hole A processed at one end, and a magnetic ring is provided on the inner peripheral surface of the central hole A;

[0050] The displacement sensor 9 adopts a magnetostrictive sensor, and its sensitive ele...

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Abstract

The invention discloses a buffering closing hydraulic cylinder and belongs to the technical field of hydraulic cylinders. The buffering closing hydraulic cylinder comprises a cylinder body, a piston rod, a sleeve, a sleeve mounting assembly, a one-way valve, a rear end cover, a front end cover and a piston; the front end cover and the rear end cover are hermetically mounted at openings at two endsof the cylinder body respectively; a central hole B, an oil port B and a first oil way which are on the rear end cover are communicated with the inner cavity of the cylinder body; the one-way valve is arranged in the oil port B of the rear end cover and is located at the end, communicated with the cylinder body, of the oil port B; a blind hole end of the piston rod penetrates through the front end cover to be coaxially installed in the cylinder body; the piston is coaxially arranged outside the blind hole end of the piston rod in a sleeving mode; the sleeve is installed in the center hole B of the rear end cover through the sleeve installation assembly; the sleeve extends out of the rear end cover; radial oil passing holes in two planes of the sleeve communicate the central hole B with the inner cavity of the sleeve; and the sleeve can be arranged in a blind hole of the piston rod in a sleeved mode. The hydraulic cylinder can realize buffering closing when the piston rod retracts.

Description

technical field [0001] The invention belongs to the technical field of hydraulic cylinders, in particular to a slow-closing hydraulic cylinder. Background technique [0002] In the field of construction machinery, the buffering and closing of hydraulic cylinders generally adopts a constant throttling buffering scheme. According to the actual load of the hydraulic cylinder, the size of the throttle hole can be adjusted to control the buffering pressure in the buffering chamber, so that when the hydraulic cylinder is closed buffer. However, due to structural limitations, the buffering effect of this type of device is poor, and the braking force at the beginning of the buffering is very large, but it is quickly reduced, and the buffering effect cannot be achieved. Contents of the invention [0003] In view of this, the present invention provides a slow-closing hydraulic cylinder, which can realize buffered closing when the piston rod is retracted. [0004] The present inven...

Claims

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Application Information

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IPC IPC(8): F15B15/22F15B15/28
CPCF15B15/22F15B15/2861
Inventor 郑志国容军蔡鹏杜浩斌
Owner CSIC ZHONGNAN EQUIP
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