CN208935063U - A kind of hydraulic cylinder buffer structure - Google Patents

A kind of hydraulic cylinder buffer structure Download PDF

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Publication number
CN208935063U
CN208935063U CN201821619988.XU CN201821619988U CN208935063U CN 208935063 U CN208935063 U CN 208935063U CN 201821619988 U CN201821619988 U CN 201821619988U CN 208935063 U CN208935063 U CN 208935063U
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CN
China
Prior art keywords
piston
cylinder
cylinder barrel
check valve
rod chamber
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Active
Application number
CN201821619988.XU
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Chinese (zh)
Inventor
江卫安
李坤
朱宝麟
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Liugong Changzhou Machinery Co Ltd
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Liugong Changzhou Machinery Co Ltd
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Priority to CN201821619988.XU priority Critical patent/CN208935063U/en
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Abstract

The utility model belongs to hydraulic machinery technical field, more particularly to a kind of hydraulic cylinder buffer structure, including cylinder barrel and cylinder cap, mutually matched piston and piston rod are provided in the cylinder barrel, the inner cavity of cylinder barrel is divided into rodless cavity and rod chamber by the piston, the piston rod is located in rod chamber, the piston rod slides through cylinder cap, working connection mouth and auxiliary oil circuit mouth are offered on the cylinder barrel, the working connection mouth is connected to rodless cavity, the auxiliary oil circuit mouth is connected to rod chamber, check valve is provided on the cylinder barrel, the oil outlet of the check valve is connected to working connection mouth, when piston is moved to cylinder barrel bottom and the gap formed between piston and cylinder barrel bottom reaches setting value, the oil inlet of check valve is connected to rod chamber and check valve is opened at this time.

Description

A kind of hydraulic cylinder buffer structure
Technical field
The utility model belongs to hydraulic machinery technical field more particularly to a kind of hydraulic cylinder buffer structure.
Background technique
Hydrocylinder buffering device passes through pistons end and cylinder ends phase when hydraulic cylinder reaches end of travel at present Gap is cooperatively formed, Choking phenomenon occurs in hydraulic oil in oil back chamber when reaching oil cylinder at the end of the stroke, generates after meter out high Pressure is to reach buffering effect, and as disclosed in patent 201320566878.2, " when work, piston is reciprocating to push away in cylinder barrel Dynamic load movement, when operation to end of travel, the cushion collar of one end enters buffer-oriented chamber, blocks the main logical of working fluid Road binders mouth, the oil liquid in cushion chamber are oozed from the annular space for the valve port aperture being in parallel with primary path by piston press, because And biggish buffer-braking power is generated, so that piston is slowed down ".This buffer structure be suitble to large-diameter oil cylinder, when cylinder diameter compared with Hour can form immense pressure between cylinder bottom and cylinder bucket using existing buffer structure, and weld seam at small cylinder diameter cylinder bottom is caused to be difficult to In addition proof strength makes buffer structure on the cylinder bottom of small cylinder diameter, it is difficult to guarantee intensity needed for cylinder bottom.
Utility model content
It is arranged to solve hydraulic oil cylinder cushion of the existing technology in cylinder bottom, cylinder bottom intensity is caused to be difficult to ensure The problem of, the utility model provides a kind of hydraulic cylinder buffer structure.
In order to solve the above technical problems, technical solution used by the utility model is as follows, a kind of hydraulic cylinder buffering knot Structure, including cylinder barrel and cylinder cap, are provided with mutually matched piston and piston rod in the cylinder barrel, and the piston is by the inner cavity of cylinder barrel It is divided into rodless cavity and rod chamber, the piston rod is located in rod chamber, and the piston rod slides through cylinder cap, opens on the cylinder barrel Equipped with working connection mouth and auxiliary oil circuit mouth, the working connection mouth is connected to rodless cavity, and the auxiliary oil circuit mouth is connected to rod chamber, described Check valve is provided on cylinder barrel, the oil outlet of the check valve is connected to working connection mouth, when piston is moved and lived to cylinder barrel bottom It fills in when reaching setting value the gap that is formed between cylinder barrel bottom, the oil inlet of check valve is connected to rod chamber and check valve at this time It opens.
Further, it is provided with the first sealing ring between the cylinder cap and cylinder barrel, is arranged between the piston rod and cylinder cap There is the second sealing ring.
The utility model has the advantages that the hydraulic cylinder buffer structure of the utility model cylinder barrel shrink when, pressure oil through auxiliary oil circuit mouth into Enter rod chamber, the pressure oil in rod chamber pushes piston to move to rodless cavity, while the pressure oil in rodless cavity is through working connection mouth It is back to fuel tank, when the gap formed between piston and cylinder barrel bottom reaches setting value, check valve is opened, the pressure in rod chamber Power oil is discharged rapidly through check valve, and the pressure oil of release is back to fuel tank through working connection mouth, reduces the pressure oil pair in rod chamber The thrust of piston, the thrust of damper piston, to avoid piston slap cylinder bottom, which can effectively realize hydraulic oil The buffering effect of cylinder at the end of the stroke not will form throttling pressure between cylinder barrel bottom and piston when hydraulic cylinder reaches end of travel Power requires cylinder barrel bottom welding seam low;The buffer structure is suitable for the liquid that the smaller discomfort of cylinder diameter shares conventional throttle buffer structure Compressing cylinder;The buffer structure can effectively improve the anufacturability of cylinder barrel simultaneously, and parts machining process is good, and it is accurate not need Orifice size is processed to guarantee compensator or trimmer pressure, it is at low cost.
Detailed description of the invention
Fig. 1 be the utility model hydraulic cylinder buffer structure to buffer piston when schematic cross-sectional view;
Fig. 2 is the schematic cross-sectional view during the piston motion of the utility model hydraulic cylinder buffer structure;
Fig. 3 is the schematic perspective view of the utility model hydraulic cylinder buffer structure;
In figure, 1, cylinder barrel, 11, working connection mouth, 12, auxiliary oil circuit mouth, 13, rodless cavity, 14, rod chamber, 2, cylinder cap, 3, work Plug, 4, piston rod, 5, check valve, the 6, first sealing ring, the 7, second sealing ring.
Specific embodiment
Embodiment
As shown in Figures 1 to 3, a kind of hydraulic cylinder buffer structure, including cylinder barrel 1 and cylinder cap 2 are provided in the cylinder barrel 1 The inner cavity of cylinder barrel 1 is divided into rodless cavity 13 and rod chamber 14, the work by mutually matched piston 3 and piston rod 4, the piston 3 Stopper rod 4 is located in rod chamber 14, and the piston rod 4 slides through cylinder cap 2, offers working connection mouth 11 and pair on the cylinder barrel 1 Oil circuit mouth 12, the working connection mouth 11 are connected to rodless cavity 13, and the auxiliary oil circuit mouth 12 is connected to rod chamber 14, the cylinder barrel 1 On be provided with check valve 5, the oil outlet of the check valve 5 is connected to working connection mouth 11, moved to 1 bottom of cylinder barrel when piston 3 and When the gap formed between 1 bottom of piston 3 and cylinder barrel reaches setting value, i.e., the distance between piston 3 and 1 bottom of cylinder barrel reach slow Punching apart from when, the oil inlet of check valve 5 be connected to rod chamber 14 and at this time check valve 5 unlatching, when piston 3 is far from 1 bottom of cylinder barrel When moving to rod chamber 14, check valve 5 ends obstructed oil.The first sealing ring 6 is provided between the cylinder cap 2 and cylinder barrel 1, it is described The second sealing ring 7 is provided between piston rod 4 and cylinder cap 2.
Working principle is as follows:
When cylinder barrel 1 is shunk, pressure oil enters rod chamber 14 through auxiliary oil circuit mouth 12, and the pressure oil in rod chamber 14 pushes piston 3 move to rodless cavity 13, while the pressure oil in rodless cavity 13 is back to fuel tank through working connection mouth 11, when piston 3 and 1 bottom of cylinder barrel When the gap formed between portion reaches setting value, check valve 5 is opened, and the pressure oil in rod chamber 14 is discharged rapidly through check valve 5, The pressure oil of release is back to fuel tank through working connection mouth 11, reduces the pressure oil in rod chamber 14 to the thrust of piston 3, buffering is lived The thrust of plug 3, so that piston 3 be avoided to hit cylinder bottom;
When cylinder barrel 1 stretches out, pressure oil enters rodless cavity 13 through working connection mouth 11, and the pressure oil in rodless cavity 13 pushes piston 3 move far from 1 bottom of cylinder barrel to rod chamber 14, and check valve 5 ends obstructed oil, while the pressure oil in rod chamber 14 is through auxiliary oil circuit Mouth 12 is back to fuel tank, and the pressure oil in rodless cavity 13 can only push piston 3 to stretch out and move to rod chamber 14.

Claims (2)

1. a kind of hydraulic cylinder buffer structure, it is characterised in that: including cylinder barrel (1) and cylinder cap (2), setting in the cylinder barrel (1) There are mutually matched piston (3) and piston rod (4), the inner cavity of cylinder barrel (1) is divided into rodless cavity (13) and has bar by the piston (3) Chamber (14), the piston rod (4) are located in rod chamber (14), and the piston rod (4) slides through cylinder cap (2), the cylinder barrel (1) On offer working connection mouth (11) and auxiliary oil circuit mouth (12), the working connection mouth (11) is connected to rodless cavity (13), the secondary oil Crossing (12) is connected to rod chamber (14), is provided with check valve (5) on the cylinder barrel (1), the oil outlet of the check valve (5) with Working connection mouth (11) connection, between piston (3) is moved to cylinder barrel (1) bottom and is formed between piston (3) and cylinder barrel (1) bottom When gap reaches setting value, the oil inlet of check valve (5) is connected to rod chamber (14) and check valve (5) is opened at this time.
2. hydraulic cylinder buffer structure according to claim 1, it is characterised in that: between the cylinder cap (2) and cylinder barrel (1) It is provided with the first sealing ring (6), is provided with the second sealing ring (7) between the piston rod (4) and cylinder cap (2).
CN201821619988.XU 2018-09-26 2018-09-26 A kind of hydraulic cylinder buffer structure Active CN208935063U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821619988.XU CN208935063U (en) 2018-09-26 2018-09-26 A kind of hydraulic cylinder buffer structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821619988.XU CN208935063U (en) 2018-09-26 2018-09-26 A kind of hydraulic cylinder buffer structure

Publications (1)

Publication Number Publication Date
CN208935063U true CN208935063U (en) 2019-06-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821619988.XU Active CN208935063U (en) 2018-09-26 2018-09-26 A kind of hydraulic cylinder buffer structure

Country Status (1)

Country Link
CN (1) CN208935063U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112196844A (en) * 2020-09-27 2021-01-08 合肥珀利机电设备有限公司 High-pressure high-purity energy accumulator for hydraulic system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112196844A (en) * 2020-09-27 2021-01-08 合肥珀利机电设备有限公司 High-pressure high-purity energy accumulator for hydraulic system

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