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Hydraulic oil cylinder and related devices of hydraulic oil cylinder, and hydraulic buffer system, excavator and concrete pump truck

A technology of hydraulic cylinders and buffer sleeves, which is applied in the field of hydraulic cylinders, can solve problems such as extremely high manufacturing precision requirements of buffer mechanisms, hydraulic cylinders cannot be used normally, and the manufacturing level is difficult to meet the requirements, so as to facilitate the organization of production, avoid mechanical failures, and process easy effect

Active Publication Date: 2011-08-17
SANY HEAVY IND CO LTD (CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, the large buffer sleeve 04 in the above-mentioned buffer mechanism needs to be repeatedly inserted into the buffer inner hole 07 at high speed, and the fit gap between the two is originally very small, and the piston rod 03 is very heavy. It is easy to tilt to one side; therefore, the hydraulic cylinder used in the above occasions is prone to failure of the buffer mechanism that the buffer sleeve 04 cannot be inserted into the buffer inner hole 07, resulting in the failure of the entire hydraulic cylinder.
[0008] Another key problem of the above-mentioned buffer mechanism is that the outer diameter of the large buffer sleeve 04 must precisely match the inner diameter of the buffer inner hole 07, otherwise the buffer effect cannot be achieved; this results in extremely high manufacturing precision requirements for the buffer mechanism , the manufacturing level of general manufacturers is difficult to meet the requirements
Due to the above-mentioned high requirements for manufacturing precision, hydraulic cylinders with large strokes and large bores have become a bottleneck in the production of excavators and other construction machinery, which seriously limits the production capacity of various downstream manufacturers.

Method used

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  • Hydraulic oil cylinder and related devices of hydraulic oil cylinder, and hydraulic buffer system, excavator and concrete pump truck
  • Hydraulic oil cylinder and related devices of hydraulic oil cylinder, and hydraulic buffer system, excavator and concrete pump truck
  • Hydraulic oil cylinder and related devices of hydraulic oil cylinder, and hydraulic buffer system, excavator and concrete pump truck

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Embodiment Construction

[0064] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0065] Please refer to Figure 2 to Figure 11 In the first specific embodiment, it includes a rod chamber end cover 1, a cylinder barrel 2, a piston rod 3, a piston 6 and a rodless chamber end cover 12, and the rod chamber end cover 1 is provided with an oil passage B, and the rodless The cavity end cover 12 is provided with an oil passage A, the piston rod 3 and the piston 6 divide the inner cavity of the hydraulic cylinder 2 into a rod chamber and a rodless chamber, and the oil passage B and the oil passage A are connected with the oil passage of the hydraulic system. Similar, they are all axial oil passages opened on the hydraulic cylinder. The oil passage B includes the oil passage hole opened on the rod chamber end c...

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Abstract

The invention discloses a hydraulic oil cylinder comprising a rod cavity end cover, a cylinder barrel, a piston rod, a piston and a rodless cavity end cover, wherein an inner cavity of the hydraulic cylinder barrel is divided into a rod cavity and a rodless cavity by the piston rod and the piston, a buffer jacket is arranged on the piston rod and comprises a first baffle jacket and / or a second buffer jacket, the buffer jacket can slide axially along the piston rod, and an axial throttling oil duct is arranged between the buffer jacket and the piston rod, the first buffer jacket is provided with a sealing end surface, a sealing end surface is arranged on a rod cavity end cover, hydraulic oil in the rod cavity passes through the throttling oil duct and is drained to the oil duct; the end surface of the second buffer jacket is contacted with a sealing end surface of the rodless cavity end cover to form sealing, and hydraulic oil in the rodless cavity passes through the throttling oil duct and is drained to the oil duct; a buffer mechanism of the hydraulic oil cylinder in the invention has long service life; moreover, the requirement to the manufacturing precision is low and the organizing production is convenient.

Description

[0001] This application is a Chinese patent application submitted to the China Patent Office on July 23, 2010, with the application number 201010235138.1, and the title of the invention is "a hydraulic cylinder and its related devices, and hydraulic buffer system, excavator and concrete pump truck" (the A utility model patent application was submitted on the same day as the technical solution for which the application was requested to be protected, and relevant procedures were performed), and the divisional application was incorporated in its entirety by reference. technical field [0002] The invention relates to the field of hydraulic technology, in particular to a hydraulic oil cylinder. The invention also provides a hydraulic buffer system, an excavator and a concrete pump truck used for the hydraulic oil cylinder. Background technique [0003] The hydraulic cylinder is a widely used part in construction machinery. During its working process, the piston needs to reciproc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B15/14F15B15/20F15B15/22
Inventor 易小刚刘永东陈兵兵
Owner SANY HEAVY IND CO LTD (CN)
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