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Push cylinder type buffer device and engineering machine

A buffer device and engineering machinery technology, applied in mechanical equipment, fluid pressure actuating devices, etc., can solve problems such as the large difference in the reset time of the oil cylinder and the inability to adjust the reset time of the oil cylinder.

Pending Publication Date: 2020-07-03
SANY HEAVY MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rapid reset time of the hydraulic cylinder is mainly determined by the time of the buffer section. Due to the influence of external load changes and machining errors, the reset time of the hydraulic cylinder varies greatly, and the reset time of the hydraulic cylinder cannot be adjusted.

Method used

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  • Push cylinder type buffer device and engineering machine
  • Push cylinder type buffer device and engineering machine
  • Push cylinder type buffer device and engineering machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] figure 1 Schematic diagram of the structure of the push cylinder type buffer device provided by the embodiment of the present invention, figure 2 For the enlarged schematic diagram of the throttle channel of the push cylinder type buffer device provided by the embodiment of the present invention, please refer to figure 1 and figure 2 As shown, this embodiment provides a push-cylinder type buffer device, which includes a housing 1 and a piston 2, the housing is provided with a first opening 11 and a second opening 12, and the piston 2 A piston rod 21 and a buffer plunger 22 are respectively provided at both ends of the two ends, the piston 2 divides the housing 1 into a first cavity and a second cavity, and the first opening 11 communicates with the first cavity, so The second opening 12 communicates with the second chamber, the housing 1 is provided with a plunger hole 13 that is clearance fit with the buffer plunger 22 , and the plunger hole 13 communicates with th...

Embodiment 2

[0061] This embodiment provides a construction machine, and the construction machine in this embodiment includes the push-cylinder type buffer device described in the first embodiment.

[0062] The push-cylinder type buffer device in this embodiment includes a housing and a piston, the housing includes a first opening and a second opening, the two ends of the piston are respectively provided with a piston rod and a buffer plunger, and the piston connects the The housing is divided into a first cavity and a second cavity, the first opening communicates with the first cavity, the second opening communicates with the second cavity, and the housing is provided with a a plug clearance fit plunger hole, said plunger hole communicating with said second opening;

[0063] A throttling passage is arranged in the housing, the throttling passage communicates with the first chamber and the second opening, and a throttling valve for adjusting the flow rate of the throttling passage is arran...

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Abstract

The invention discloses a push cylinder type buffer device and an engineering machine. The push cylinder type buffer device comprises a shell and a piston, a first opening and a second opening are formed in the shell, the two ends of the piston are provided with a piston rod and a buffer plunger correspondingly, the piston is movably mounted in the shell and divides the shell into a first cavity and a second cavity, the first opening communicates with the first cavity, the second opening communicates with the second cavity, the shell is provided with a plunger hole in clearance fit with the buffer plunger, the plunger hole communicates with the second opening, a throttling channel is mounted in the shell, and communicates with the first cavity and the first opening, a throttling valve usedfor adjusting the medium flow in the throttling channel is mounted in the throttling channel, according to the push cylinder type buffer device, when the piston is reset, on one hand, buffering is carried out through clearance fit between the buffer plunger and the plunger hole, on the other hand, the throttling valve is adjusted, the magnitude of the flow of media in the throttling channel can be changed, and the rapid reset time of the piston is adjusted.

Description

technical field [0001] The invention relates to the field of mechanical engineering, in particular to a cylinder-push buffer device and engineering machinery. Background technique [0002] When the push cylinder type hydraulic cylinder drives the working parts with large mass and fast movement speed, in order to eliminate the mechanical impact between the piston and the cylinder head caused by the inertial force and hydraulic pressure of the moving parts, the hydraulic cylinder is generally equipped with a buffer device . [0003] The buffer device of the existing hydraulic cylinder generally reduces the circulation channel of the hydraulic oil when the cylinder is quickly reset, thereby generating a certain back pressure to reduce the movement speed of the piston rod and reduce the impact of the piston rod on the cylinder head. The rapid reset time of the hydraulic cylinder is mainly determined by the time of the buffer section. Due to the influence of external load change...

Claims

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Application Information

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IPC IPC(8): F15B15/22
CPCF15B15/227F15B2215/30
Inventor 水磊贡辉军陈雪
Owner SANY HEAVY MACHINERY
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