CN203146480U - Rod-less cavity side buffer structure for hydraulic cylinder - Google Patents
Rod-less cavity side buffer structure for hydraulic cylinder Download PDFInfo
- Publication number
- CN203146480U CN203146480U CN 201320054413 CN201320054413U CN203146480U CN 203146480 U CN203146480 U CN 203146480U CN 201320054413 CN201320054413 CN 201320054413 CN 201320054413 U CN201320054413 U CN 201320054413U CN 203146480 U CN203146480 U CN 203146480U
- Authority
- CN
- China
- Prior art keywords
- oil
- cylinder
- cavity side
- buffer structure
- oil transportation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Actuator (AREA)
Abstract
The utility model belongs to the technical field of hydraulic cylinders, and particularly relates to a rod-less cavity side buffer structure for a hydraulic cylinder. The rod-less cavity side buffer structure is simple, reasonable, low in cost and fine in buffer effect, cannot pollute a hydraulic system, and accordingly overcomes the shortcomings of the prior art. The rod-less cavity side buffer structure comprises a piston rod, a piston, a rear buffer ring, a cylinder body and a cylinder bottom, the piston and the rear buffer ring are sleeved on the piston rod, the cylinder body is positioned on the outer side of the piston, and the cylinder bottom is connected with the cylinder body. The rod-less cavity side buffer structure is characterized in that an oil transportation buffer hole is arranged in the middle of the cylinder body, a throttling hole is arranged on the cylinder body of one side of an opening of the oil transportation buffer hole, the throttling hole, the oil transportation buffer hole and a return oil passage are communicated on the rear side of the cylinder bottom, and a combined sealing device is arranged between the rear buffer ring and the inner wall of the oil transportation buffer hole.
Description
Technical field
The utility model belongs to the oil hydraulic cylinder technical field, is specially a kind of rodless cavity side buffer structure of oil hydraulic cylinder.
Background technique
Oil hydraulic cylinder is executive component commonly used in the hydraulic system, and piston 2 can collide with cylinder bottom 5 when hydraulic cylinder travel is at the end, and produces and impacts.In order to reduce impact; usually can use cylinder bottom 5 to be provided with the oil hydraulic cylinder of buffer structure; at present; buffering hydraulic cylinder of the prior art adopts " gap buffer " mostly; its structure as shown in Figure 1; comprise piston rod 1, be sleeved on piston 2 on the piston rod 1 with back buffering ring 4, be positioned at the cylinder body 3 in piston 2 outsides and the cylinder bottom 5 that is connected with cylinder body 3, cylinder bottom 5 is provided with oil transportation cushion hole 9, designing between oil transportation cushion hole 9 and the back buffering ring 4 has certain radial clearance.Oil hydraulic cylinder in the course of the work, when back buffering ring 4 moves and enters into oil transportation cushion hole 9, hydraulic oil in the oil hydraulic cylinder oil back chamber is extruded by the gap between back buffering ring 4 and the oil transportation cushion hole 9, flow of fluid is obstructed, the movement velocity of piston 2 slows down, thereby makes oil hydraulic cylinder reach cushioning effect.Buffering hydraulic cylinder with said structure, welded, the influence of factor such as processing, radial clearance control between back buffering ring 4 and the oil transportation cushion hole 9 is inaccurate, when excesssive gap, oil hydraulic cylinder does not reach cushioning effect, when the gap is too small, back buffering ring 4 often occurs and rub mutually with cylinder bottom 5, stuck phenomenon appears when serious.
Summary of the invention
In order to address the above problem, it is a kind of simple and reasonable, with low cost that the utility model provides, and good buffer effect, and oil hydraulic cylinder rodless cavity side buffer structure that can the contaminated liquid pressing system are to overcome deficiency of the prior art.
A kind of rodless cavity side buffer structure of oil hydraulic cylinder, its technological scheme is such: it comprises piston rod, is sleeved on piston and back buffering ring, the cylinder body that is positioned at the described piston outside and the cylinder bottom that is connected with described cylinder body on the described piston rod, it is characterized in that, be provided with the oil transportation cushion hole in the middle of the described cylinder body, the cylinder body of one side of described oil transportation cushion hole opening is provided with throttle orifice, described throttle orifice and described oil transportation cushion hole communicate with drainback passage at described cylinder bottom rear side, are provided with combination sealing arrangement between described back buffering ring and the described oil transportation cushion hole inwall.
It is further characterized in that: described back buffering ring circumferential surface is provided with circular groove, and described combination sealing arrangement is arranged in the described circular groove; Described combination sealing arrangement is made up of two back-up rings and a 〇 shape circle; The center line of described throttle orifice is parallel with the center line of described oil transportation cushion hole; Described back buffering ring outer side is along being provided with chamfering.
The utility model adopts after the said structure, being provided with combination sealing arrangement can make between back buffering ring and cylinder bottom oil transportation cushion hole and leave bigger radial clearance, to the back buffering ring, part coaxalitys such as cylinder bottom require lower, the back buffering ring stuck phenomenon of effectively having avoided producing because gap control is inaccurate causes the surface of back buffering ring and the contact of oil transportation cushion hole to be pulled, the generation iron filings enter in the hydraulic oil so that pollute hydraulic oil, reduced difficulty of processing, with low cost, this is simple and reliable for structure simultaneously, combination sealing arrangement can cut off hydraulic oil, make hydraulic oil enter drainback passage by throttle orifice, play buffer function, structure of the present utility model has improved the cushioning effect of oil hydraulic cylinder rodless cavity side greatly, overcomes deficiency of the prior art.
Description of drawings
Fig. 1 is the prior art constructions schematic representation;
Fig. 2 is structural representation of the present utility model;
Fig. 3 is A portion enlarged view among Fig. 2.
Embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, now exemplify following examples, and conjunction with figs. is described in detail as follows: as Fig. 2, shown in Figure 3, a kind of rodless cavity side buffer structure of oil hydraulic cylinder, it comprises piston rod 1, be sleeved on piston 2 and back buffering ring 4 on the piston rod 1, be positioned at the cylinder body 3 in piston 1 outside and the cylinder bottom 5 that is connected with cylinder body 3, be provided with oil transportation cushion hole 9 in the middle of the cylinder body 3, the cylinder body 3 of one side of oil transportation cushion hole 9 openings is provided with throttle orifice 8, throttle orifice 8 and oil transportation cushion hole 9 communicate with drainback passage 7 at cylinder bottom 5 rear sides, back buffering ring 4 circumferential surfacies are provided with circular groove, are provided with the combination sealing arrangement 6 in gap between back buffering ring 4 and oil transportation cushion hole 9 inwalls in the circular groove; The center line of throttle orifice 8 is parallel with the center line of oil transportation cushion hole 9; Back buffering ring 4 outer side are along being provided with chamfering; Combination sealing arrangement 6 is made up of two back-up ring 6-2 and a 〇 shape circle 6-1.
Working principle of the present utility model is: in the hydraulic cylinder piston 2 backhaul processes, before the back buffering ring 4 that combination sealing arrangement 6 is installed does not enter into the oil transportation cushion hole 9 of cylinder bottom 5, hydraulic oil arrives drainback passage 7 by the oil transportation cushion hole 9 in the cylinder bottom 5 and throttle orifice 8 oil returns, when the back buffering ring 4 that combination sealing arrangement 6 is installed enters into the oil transportation cushion hole 9 of cylinder bottom 5, combination sealing arrangement 6 has cut off the hydraulic oil of both sides all around, make the hydraulic oil in combination sealing arrangement 6 left sides to be expressed into drainback passage 7 by the throttle orifice 8 of cylinder bottom 5, because the flow velocity of hydraulic oil is slack-off, thereby form the oil return resistance to realize buffering; In the utility model, between the oil transportation cushion hole 9 in back buffering ring 4 and the cylinder bottom 5 bigger radial clearance can be arranged, avoided because of gap when too small, buffering ring 4 rubs mutually with cylinder bottom 5 or the stuck phenomenon generation after occurring, simultaneously by combination sealing arrangement 6 effects on the buffering ring 4 of back, prevent that hydraulic oil from directly entering into drainback passage 7 by oil transportation cushion hole 9, thereby guarantee the reliability of oil hydraulic cylinder cushioning effect; Back buffering ring 4 outer side are along being provided with chamfering, can be so that in the easier oil transportation cushion hole 9 that enters cylinder bottom 5 of back buffering ring 4, the iron filings that produce of reducing friction enter hydraulic oil so that pollute hydraulic oil.
Claims (5)
1. the rodless cavity side buffer structure of an oil hydraulic cylinder, it comprises piston rod, is sleeved on piston and back buffering ring, the cylinder body that is positioned at the described piston outside and the cylinder bottom that is connected with described cylinder body on the described piston rod, it is characterized in that, be provided with the oil transportation cushion hole in the middle of the described cylinder body, the cylinder body of one side of described oil transportation cushion hole opening is provided with throttle orifice, described throttle orifice and described oil transportation cushion hole communicate with drainback passage at the cylinder bottom rear side, are provided with combination sealing arrangement between described back buffering ring and the described oil transportation cushion hole inwall.
2. according to the rodless cavity side buffer structure of the described a kind of oil hydraulic cylinder of claim 1, it is characterized in that: described back buffering ring circumferential surface is provided with circular groove, in described combination sealing arrangement setting and the described circular groove.
3. according to the rodless cavity side buffer structure of the described a kind of oil hydraulic cylinder of claim 2, it is characterized in that: described combination sealing arrangement is made up of two back-up rings and a 〇 shape circle.
4. according to the rodless cavity side buffer structure of the described a kind of oil hydraulic cylinder of claim 1, it is characterized in that: the center line of described throttle orifice is parallel in the center line of described oil transportation cushion hole.
5. according to the rodless cavity side buffer structure of the described a kind of oil hydraulic cylinder of claim 1, it is characterized in that: described back buffering ring outer side is along being provided with chamfering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320054413 CN203146480U (en) | 2013-01-31 | 2013-01-31 | Rod-less cavity side buffer structure for hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320054413 CN203146480U (en) | 2013-01-31 | 2013-01-31 | Rod-less cavity side buffer structure for hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203146480U true CN203146480U (en) | 2013-08-21 |
Family
ID=48974006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320054413 Expired - Fee Related CN203146480U (en) | 2013-01-31 | 2013-01-31 | Rod-less cavity side buffer structure for hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203146480U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821790A (en) * | 2013-11-29 | 2014-05-28 | 安徽凯信机电科技有限公司 | Hydraulic cylinder with buffering mechanism |
| CN104564895A (en) * | 2013-10-24 | 2015-04-29 | 比亚迪股份有限公司 | Single-acting plunger cylinder and forklift |
| CN104613049A (en) * | 2014-11-28 | 2015-05-13 | 三一重型装备有限公司 | Hydraulic oil cylinder and engineering machine |
| CN106678125A (en) * | 2016-12-05 | 2017-05-17 | 中船重工中南装备有限责任公司 | Hydraulic hoist oil cylinder buffering device and operation method |
| CN109578369A (en) * | 2018-12-04 | 2019-04-05 | 长安大学 | A kind of buffer unit of flexible boom cylinder |
| CN110159615A (en) * | 2019-04-26 | 2019-08-23 | 平高集团有限公司 | The working cylinder of cushion collar and the hydraulic device using the cushion collar |
| CN110159610A (en) * | 2019-04-26 | 2019-08-23 | 平高集团有限公司 | The plug and hydraulic device working cylinder of hydraulic device working cylinder |
-
2013
- 2013-01-31 CN CN 201320054413 patent/CN203146480U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564895A (en) * | 2013-10-24 | 2015-04-29 | 比亚迪股份有限公司 | Single-acting plunger cylinder and forklift |
| CN104564895B (en) * | 2013-10-24 | 2017-02-15 | 比亚迪股份有限公司 | Single-acting plunger cylinder and forklift |
| CN103821790A (en) * | 2013-11-29 | 2014-05-28 | 安徽凯信机电科技有限公司 | Hydraulic cylinder with buffering mechanism |
| CN104613049A (en) * | 2014-11-28 | 2015-05-13 | 三一重型装备有限公司 | Hydraulic oil cylinder and engineering machine |
| CN106678125A (en) * | 2016-12-05 | 2017-05-17 | 中船重工中南装备有限责任公司 | Hydraulic hoist oil cylinder buffering device and operation method |
| CN109578369A (en) * | 2018-12-04 | 2019-04-05 | 长安大学 | A kind of buffer unit of flexible boom cylinder |
| CN110159615A (en) * | 2019-04-26 | 2019-08-23 | 平高集团有限公司 | The working cylinder of cushion collar and the hydraulic device using the cushion collar |
| CN110159610A (en) * | 2019-04-26 | 2019-08-23 | 平高集团有限公司 | The plug and hydraulic device working cylinder of hydraulic device working cylinder |
| CN110159610B (en) * | 2019-04-26 | 2020-11-06 | 平高集团有限公司 | Plug of hydraulic device working cylinder and hydraulic device working cylinder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203146480U (en) | Rod-less cavity side buffer structure for hydraulic cylinder | |
| CN102444637B (en) | Plug-in overflow valve | |
| CN102410270B (en) | Turning gradient control valve | |
| CN202560686U (en) | Long-stroke buffering cylinder | |
| CN201636116U (en) | Gap cushioning hydraulic cylinder | |
| CN106564456A (en) | Hydraulic buffer type bumper | |
| CN203614510U (en) | Hydraulic buffering oil cylinder | |
| CN103090070A (en) | Piloted type pressure reducing valve | |
| CN205446259U (en) | Hydraulic cylinder of double piston rods | |
| CN203770292U (en) | Variable-cross-section double-piston hydraulic cylinder | |
| CN105650055B (en) | A kind of hydraulic cylinder with double piston rods | |
| CN202718966U (en) | Hydraulic oil cylinder buffering sleeve | |
| CN203394921U (en) | Plunger hydraulic cylinder | |
| CN101907110A (en) | Multi-damping-hole buffer sleeve hydraulic cylinder | |
| CN201391501Y (en) | Buffering hydraulic cylinder | |
| CN103883585B (en) | A kind of self-adapting load conversion oil hydraulic cylinder | |
| CN205877053U (en) | Two -way hydraulic absorber | |
| CN103629188B (en) | Buffer device for actuator drum | |
| CN203641153U (en) | Butter type hydraulic oil cylinder | |
| CN204436946U (en) | The permanent throttling buffering mechanism of a kind of oil hydraulic cylinder | |
| CN201391511Y (en) | Hydraulic cylinder cushioning device | |
| CN204312457U (en) | Oil recovery cylinder cushion device | |
| CN203570747U (en) | Efficient and energy-saving two-way buffer hydraulic oil cylinder | |
| CN203321937U (en) | Buffer oil cylinder | |
| CN103697184B (en) | A kind of through-flow structure of valve port of slide valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20140922 Granted publication date: 20130821 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20150322 Granted publication date: 20130821 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130821 Termination date: 20170131 |