CN203257793U

CN203257793U - Damping device for hydraulic cylinder

Info

Publication number: CN203257793U
Application number: CN 201320269781
Authority: CN
Inventors: 魏征宇; 郭玉玺
Original assignee: Taiyuan Heavy Industry Co Ltd
Current assignee: Taiyuan Heavy Industry Co Ltd
Priority date: 2013-05-17
Filing date: 2013-05-17
Publication date: 2013-10-30
Anticipated expiration: 2023-05-17

Abstract

The utility model relates to a hydraulic cylinder and particularly relates to a damping device for a hydraulic cylinder, aiming at the problem that the moving components of the existing hydraulic cylinder can collide with the top and the bottom of the existing hydraulic cylinder. The damping device is characterized in that the side surface of a flange at the head of the hydraulic cylinder is provided with a piston-rod-cavity oil port, the center of a flange at the bottom of the hydraulic cylinder is provided with a piston-cavity oil port, each of the flanges on the head and the bottom of the hydraulic cylinder is provided with a gap channel, guide sleeves are arranged on the flanges on the head and the bottom of the hydraulic cylinder, and the internal diameters of the guide sleeves are in clearance fit with the steps of a piston rod. By using the damping device provided by the utility model, the moving components of the hydraulic cylinder hardly collide with the head and the bottom of the hydraulic cylinder so that the hydraulic cylinder operates stably, safely and reliably.

Description

A kind of hydraulic pressure cylinder cushion

Technical field

The utility model relates to oil hydraulic cylinder, particularly a kind of hydraulic pressure cylinder cushion (with the oil hydraulic cylinder of damping device).

Background technique

In oil hydraulic cylinder when operation,, the to-and-fro motion in cylinder body of piston and piston rod because piston and piston rod self have certain quality, has very large momentum under fluid pressure drives.When piston moves to terminal, moving piston tends to contact with cylinder head or cylinder bottom (generation mechanical collision), produce very large impact and noise, these impacts also can cause the damage of the related components such as pipeline, valve group, instrument in the damage of oil hydraulic cylinder itself and hydraulic system, and impact is normally produced.

Summary of the invention

The purpose of this utility model is the shortcoming that overcomes prior art, and a kind of hydraulic pressure cylinder cushion is provided, and solving existing hydraulic cylinder parts (piston and piston rod) can be to the problem of cylinder head and cylinder bottom impact.

The utility model is achieved through the following technical solutions.

A kind of hydraulic pressure cylinder cushion, comprise: cylinder barrel, be arranged on the piston in cylinder barrel, the piston rod that is connected with piston, be arranged on the cylinder end flange of cylinder barrel one end, be arranged on the cylinder bottom flange of the cylinder barrel the other end, and the two seals that is arranged on the outside piston face, it is characterized in that: the rod end chamber hydraulic fluid port is offered in the side of described cylinder end flange, and the high pressure oil in pipeline is connected with rod end chamber by the rod end chamber hydraulic fluid port; Described cylinder bottom flange central authorities offer the piston cavity hydraulic fluid port, and the high pressure oil in pipeline is connected with piston cavity by the piston cavity hydraulic fluid port; Have I cylinder head clearance channel, II cylinder head clearance channel and cylinder head hole on described cylinder end flange, I cylinder head clearance channel, II cylinder head clearance channel, cylinder head hole is interconnected, and cylinder head is installed the mat woven of fine bamboo strips one modulating valve in the hole; Have I cylinder bottom clearance channel, II cylinder bottom clearance channel and cylinder bottom hole on described cylinder bottom flange, I cylinder bottom clearance channel, II cylinder bottom clearance channel, cylinder bottom hole is interconnected, and cylinder bottom is installed the mat woven of fine bamboo strips two modulating valve in the hole; Described cylinder end flange is installed cylinder head guide pin bushing, the large step Spielpassung of cylinder head guide pin bushing internal diameter and piston rod; Described cylinder bottom flange is installed cylinder bottom guide pin bushing, the small stair Spielpassung of cylinder bottom guide pin bushing internal diameter and piston rod.

The utility model compared with prior art, offer the piston cavity hydraulic fluid port owing to offering rod end chamber hydraulic fluid port, cylinder bottom flange central authorities in the side of hydraulic cylinder head flange, and have clearance channel on cylinder end flange, cylinder bottom flange, formed the hydraulic pressure cylinder cushion, can effectively reduce moving element (piston and piston rod) to the collision impact of cylinder head and cylinder bottom, guarantee that oil hydraulic cylinder operates steadily, safe and reliable.

The utility model has the advantages that: by to the piston retarding braking, realized the buffering of oil hydraulic cylinder, simultaneously, cushion stroke is customizable, and buffer speed can be regulated.

Description of drawings

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the I section enlarged view of Fig. 1;

Fig. 3 is the II section enlarged view of Fig. 1.

The utility model is further described by preferred embodiment below in conjunction with accompanying drawing.

Embodiment

As shown in Figure 1, 2, 3, a kind of hydraulic pressure cylinder cushion, comprise: cylinder barrel 1, be arranged on the piston 5 in cylinder barrel, the piston rod 4 that is connected with piston 5 is arranged on the cylinder end flange 2 of cylinder barrel 1 one ends, be arranged on the cylinder bottom flange 3 of cylinder barrel 1 the other end, and the two seals 6 that is arranged on piston 5 peripheries, rod end chamber hydraulic fluid port AA is offered in the side of described cylinder end flange 2, and the high pressure oil in pipeline is connected with rod end chamber A by rod end chamber hydraulic fluid port AA; Described cylinder bottom flange 3 central authorities offer piston cavity hydraulic fluid port BB, and the high pressure oil in pipeline is connected with piston cavity B by piston cavity hydraulic fluid port BB; Have I cylinder head clearance channel 2-1 and II cylinder head clearance channel 2-2 and cylinder head hole 2-3 on described cylinder end flange 2, I cylinder head clearance channel 2-1 and II cylinder head clearance channel 2-2 and cylinder head hole 2-3 are interconnected, and the mat woven of fine bamboo strips one modulating valve 7 is installed in cylinder head hole 2-3; Have I cylinder bottom clearance channel 3-1 and II cylinder bottom clearance channel 3-2 and cylinder bottom hole 3-3 on described cylinder bottom flange 3, I cylinder bottom clearance channel 3-1 and II cylinder bottom clearance channel 3-2 and cylinder bottom hole 3-3 are interconnected, and the mat woven of fine bamboo strips two modulating valve 8 are installed in cylinder bottom hole 3-3; Described cylinder end flange 2 is installed cylinder head guide pin bushing 9, the large step 4-1 Spielpassung of cylinder head guide pin bushing 9 internal diameters and piston rod 4; Described cylinder bottom flange 3 is installed cylinder bottom guide pin bushing 10, the small stair 4-2 Spielpassung of cylinder bottom guide pin bushing 10 internal diameters and piston rod 4.

The utility model working procedure is as follows:

Rod end chamber A advances high pressure oil, and driven plunger 5 and piston rod 4 are to the direction rapid movement (conventional speeds motion) of cylinder bottom flange 3, and the oil of piston cavity B is discharged fast from piston cavity hydraulic fluid port BB.When the small stair 4-2 of piston rod 4 enters cylinder bottom guide pin bushing 10, piston cavity B and piston cavity hydraulic fluid port BB are cut off, the oil of piston cavity B can't directly be discharged from piston cavity hydraulic fluid port BB, can only discharge from piston cavity hydraulic fluid port BB by I cylinder bottom clearance channel 3-1 and the II cylinder bottom clearance channel 3-2 on cylinder bottom flange 3, this moment, piston 5 and piston rod 4 were decelerated at a slow speed, had played the effect of buffering.The mat woven of fine bamboo strips two modulating valve 8 can up-down adjustment, plays the effect that increases or dwindle the clearance channel through-current capacity, realizes adjusting the purpose of buffer speed.

Same, piston cavity B advances high pressure oil, and driven plunger 5 and piston rod 4 are to the direction rapid movement (conventional speeds motion) of cylinder end flange 2, and the oil of rod end chamber A is discharged fast from rod end chamber hydraulic fluid port AA.When the large step 4-1 of piston rod 4 enters cylinder head guide pin bushing 9, rod end chamber A and rod end chamber hydraulic fluid port AA are cut off, the oil of rod end chamber A can't directly be discharged from piston cavity bar hydraulic fluid port AA, can only discharge from rod end chamber hydraulic fluid port AA by I cylinder head clearance channel 2-1 and the II cylinder head clearance channel 2-2 on cylinder end flange 2, this moment, piston 5 and piston rod 4 were decelerated at a slow speed, had played the effect of buffering.The mat woven of fine bamboo strips one modulating valve 7 can up-down adjustment, plays the effect that increases or dwindle the clearance channel through-current capacity, realizes adjusting the purpose of buffer speed.

By the large step 4-1 of adjustment piston rod 4 and position and the length of small stair 4-2, customize cushion stroke.

Claims

1. hydraulic pressure cylinder cushion, comprise: cylinder barrel (1), be arranged on the piston (5) in cylinder barrel, the piston rod (4) that is connected with piston (5), be arranged on the cylinder end flange (2) of cylinder barrel (1) one end, be arranged on the cylinder bottom flange (3) of cylinder barrel (1) the other end, and the two seals (6) that is arranged on piston (5) periphery, it is characterized in that: rod end chamber hydraulic fluid port (AA) is offered in the side of described cylinder end flange (2), and the high pressure oil in pipeline is connected with rod end chamber (A) by rod end chamber hydraulic fluid port (AA); Described cylinder bottom flange (3) central authorities offer piston cavity hydraulic fluid port (BB), and the high pressure oil in pipeline is connected with piston cavity (B) by piston cavity hydraulic fluid port (BB); Have I cylinder head clearance channel (2-1), II cylinder head clearance channel (2-2) and cylinder head hole (2-3) on described cylinder end flange (2), I cylinder head clearance channel (2-1), II cylinder head clearance channel (2-2), cylinder head hole (2-3) are interconnected, and the mat woven of fine bamboo strips one modulating valve (7) is installed in cylinder head hole (2-3); Have I cylinder bottom clearance channel (3-1), II cylinder bottom clearance channel (3-2) and cylinder bottom hole (3-3) on described cylinder bottom flange (3), I cylinder bottom clearance channel (3-1), II cylinder bottom clearance channel (3-2), cylinder bottom hole (3-3) are interconnected, and the mat woven of fine bamboo strips two modulating valve (8) are installed in cylinder bottom hole (3-3); Described cylinder end flange (2) is installed cylinder head guide pin bushing (9), large step (4-1) Spielpassung of cylinder head guide pin bushing (9) internal diameter and piston rod (4); Described cylinder bottom flange (3) is installed cylinder bottom guide pin bushing (10), small stair (4-2) Spielpassung of cylinder bottom guide pin bushing (10) internal diameter and piston rod (4).