CN203201899U - Buffering hydraulic cylinder - Google Patents
Buffering hydraulic cylinder Download PDFInfo
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- CN203201899U CN203201899U CN 201320159460 CN201320159460U CN203201899U CN 203201899 U CN203201899 U CN 203201899U CN 201320159460 CN201320159460 CN 201320159460 CN 201320159460 U CN201320159460 U CN 201320159460U CN 203201899 U CN203201899 U CN 203201899U
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Abstract
The utility model discloses a buffering hydraulic cylinder. A buffering hole in clearance fit with a buffering sleeve is formed in a cylinder head and is used for buffering and throttling. A beveled edge and a cross-shaped oil groove are formed in the rear end face of the cylinder head, so that the starting area of the cylinder is enlarged. The inner wall of the buffering sleeve is of a stair-type face. The inner circle of the front end of the stair-type face is larger than the inner circle of the rear end of the stair-type face. The inner wall of the stair-type face of the buffering sleeve is in clearance fit with the outer wall of the stair-type face of a piston rod. The buffering sleeve can float in the axial direction and the radial direction of the piston rod. Two symmetric inclined faces are arranged on the outer circle of the buffering sleeve. The sectional area of the front end of each inclined face is larger than that of the rear end of each inclined face and the sectional area of each inclined face is gradually reduced from the front portion to the rear portion. Meanwhile, a beveled edge and a radial oil groove are further formed in the rear end face of the buffering sleeve. The buffering hydraulic cylinder has the advantages that the chamfer beveled edge and the cross-shaped oil groove are formed in the rear end face of the cylinder head and when the piston rod stretches out completely, a certain space is reserved between a piston and the cylinder head, so that the starting area of the cylinder is enlarged. The problems of slow starting, shaking and abnormal sound of the cylinder when the piston is just contracted are solved.
Description
Technical field
The utility model relates to a kind of hydraulic jack, especially a kind of buffering hydraulic oil cylinder.
Background technique
The oil cylinder of working at high speed generally can increase the cylinder buffer structure because speed is fast, impact is big.The form of buffer structure is to stop up the cushion collar of cylinder head spill port gradually in piston rod increase by mostly, though the sort buffer structure is simple, cushioning effect is very poor, still has shake and impact to a certain degree during buffering.And when piston was regained, oil cylinder can cause oil cylinder tripping force deficiency output to start phenomenons such as slow or difficulty because starting area for a short time; When the instantaneous disengaging cylinder head of cushion collar cushion hole, also can increase the space of rod chamber and cause hydraulic oil to replenish untimely and produce the phenomenon of oil cylinder abnormal sound and shake because of instantaneous simultaneously, have a strong impact on the service behaviour of oil hydraulic cylinder and whole hydraulic system.And start slow and difficult phenomenon often at cylinder head increase by one one-way valve for fear of not enough generation of oil cylinder tripping force at present, increased the complexity of buffer structure and the difficulty of related components processing so undoubtedly, and often there is significant limitation in the use of one-way valve.
The model utility content
The technical problems to be solved in the utility model provides that a kind of oil cylinder starts rapidly when buffering does not exist shake and to a certain degree impact and piston just to withdraw when piston rod stretches out fully, breakout pressure is low and can not produce the buffering hydraulic oil cylinder of abnormal sound and shake when starting.
The technological scheme that its technical problem that solves the utility model adopts is: a kind of buffering hydraulic oil cylinder, comprise cylinder head, cylinder barrel, piston rod and piston, described piston is divided into rod chamber and rodless cavity with described inner cavity of cylinder, described cylinder barrel rear end is provided with hydraulic fluid port P, and described hydraulic fluid port P communicates with described rodless cavity; Cushion collar is sleeved on and is in described rod chamber one side on the described piston rod, described cushion collar inwall is ladder surface, circle is greater than circle in the ladder surface rear end in the ladder surface front end, described cushion collar ladder surface inwall and described piston rod ladder surface outer wall are Spielpassung, described cushion collar can be at the axial and radial floating of described piston rod, described cushion collar cylindrical is provided with symmetrical inclined-plane, and the sectional area of the front end on described symmetrical inclined-plane is less than the sectional area of rear end; The cushion collar ear end face is provided with radially oil groove, described cylinder head be provided with communicate with described rod chamber and with the cushion hole of described cushion collar Spielpassung, described cylinder head is provided with hydraulic fluid port T, described hydraulic fluid port T communicates with described cushion hole, and the ear end face of described cylinder head is provided with chamfering groove and oil groove.
The oil groove that the ear end face of described cylinder head is provided with is the cross oil groove.
Adopt the buffering hydraulic oil cylinder of such scheme, cylinder head is provided with the cushion hole with the cushion collar Spielpassung, is used for the buffering throttling; Cylinder head ear end face place is provided with groove and cross oil groove, is used for increasing oil cylinder and starts area.Cushion collar is contained on the piston rod, and being between cylinder head and the piston is rod chamber one side; The cushion collar inwall is ladder surface, and circle is greater than circle in the ladder surface rear end in the ladder surface front end, and cushion collar ladder surface inwall and piston rod ladder surface outer wall are Spielpassung, and cushion collar can be at the axial and radial floating of piston rod.The cushion collar cylindrical is provided with symmetrical inclined-plane, and the sectional area of symmetrical inclined-plane front end is less than the sectional area of rear end, and sectional area increases after by forward direction gradually.
Because the cylinder head ear end face is provided with the structural type of groove and cross oil groove, when piston rod stretches out fully, also leaves certain space between piston and the cylinder head, has increased the startup area of oil cylinder.Solved on the structure when oil cylinder piston has just been withdrawn start slowly, the phenomenon of shake and abnormal sound.
In sum, the utility model is that a kind of oil cylinder starts rapidly when buffering does not exist shake and to a certain degree impact and piston just to withdraw when piston rod stretches out fully, breakout pressure is low and can not produce the buffering hydraulic oil cylinder of abnormal sound and shake when starting.
Description of drawings
Below in conjunction with accompanying drawing and example the utility model is further specified.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structure enlarged view of oil cylinder when beginning to cushion.
Fig. 3 is the structure enlarged view of oil cylinder when beginning to start.
Fig. 4 is radially oil groove (C place) partial enlarged drawing of cylinder head ear end face.
Embodiment
Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, excavator high-voltage oil cylinder buffer structure comprises cylinder head 1, cylinder barrel 2, piston rod 3 and piston 5, setting cylinder head 1 one ends is front end, piston 5 one ends are the rear end, piston 5 outer walls are equipped with Sealing, and the seal cooperates with cylinder barrel 2 inner wall sealings and cylinder barrel 2 inner chambers are divided into rod chamber 10 and rodless cavity 11; Cylinder head 1 inwall is provided with Sealing, and the seal and piston rod 3 outer walls are sealed and matched; Cylinder barrel 2 rear ends are provided with hydraulic fluid port P, and hydraulic fluid port P is identical with rodless cavity 11; Cushion collar 4 is sleeved on the piston rod 3, be between cylinder head 1 and the piston 5 is rod chamber 10 1 sides, cushion collar 4 inwalls are ladder surface, circle is greater than circle in the ladder surface rear end in the ladder surface front end, cushion collar 4 ladder surface inwalls and piston rod 3 ladder surface outer walls are Spielpassung, cushion collar 4 can be at the axial and radial floating of piston rod 3, and cushion collar 4 cylindricals are provided with symmetrical inclined-plane 9, and the sectional area of symmetrical inclined-plane 9 front ends is less than the sectional area of rear end; Cushion collar 4 ear end faces are provided with radially oil groove 8, cylinder head 1 be provided with communicate with rod chamber 11 and with the cushion hole 7 of cushion collar 4 Spielpassung, cylinder head 1 is provided with hydraulic fluid port T, hydraulic fluid port T communicates with cushion hole 7, cushion collar 4 can enter in the cushion hole 7; The ear end face of cylinder head 1 is provided with chamfering groove 12 and cross oil groove 6.
Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the utility model when fluid enters into rodless cavity 11 from the P mouth, promotes piston 5 and piston rod 3 motions in use, and piston rod 3 is protruding.When piston rod 3 stretched out near terminal point, cushion collar 4 began to enter the cushion hole 7 at cylinder head 1 place.At this moment, because cushion collar 4 inwalls are ladder surface, under the effect of oil pressure, the cushion collar 4 that is in quick condition moves forward, and the middle end face of ladder surface firmly is adjacent to the ladder end face of piston rod 3 in the cushion collar 4, forms sealing effect.Therefore, when piston rod 3 stretches out near terminal point, hydraulic oil in the rod chamber 10 can only be discharged from cushion hole 7 and the gap between cushion collar 4 outer walls of cylinder head 1, because the flow that fluid is discharged reduces, the symmetrical inclined-plane 9 that cushion collar 4 cylindricals are provided with makes the hydraulic oil of discharging reduce gradually, piston rod 3 steadily and slowly stretches out, and has avoided the front-end face of piston 5 and the huge bump that cylinder head 1 ear end face produces, and has reached the effect of steady buffering.
When fluid enters piston rod 3 inside withdrawals from the T mouth, under the effect of fluid, cushion collar 4 is mobile backward, the middle end face of cushion collar 4 ladder surfaces separates with the ladder end face of piston rod 3 and forms the gap, therefore the hydraulic oil gap that dashes between cover 4 outer walls and the cylinder head 1 of namely can postponing enters rod chamber 10, also can enter rod chamber 10 from the gap of 3 in cushion collar 4 inwalls and piston rod.Because cylinder head 1 ear end face is provided with chamfering groove 12 and cross oil groove 6, when even piston rod 3 stretches out fully, also leave certain space between piston 5 and the cylinder head 1, increased the startup area of oil cylinder greatly, reduced the breakout pressure of oil cylinder, piston rod 3 is mobile backward stably, the startup that has produced when effectively having avoided oil cylinder to start slowly, phenomenons such as shake and abnormal sound.
Claims (2)
1. buffering hydraulic oil cylinder, comprise cylinder head (1), cylinder barrel (2), piston rod (3) and piston (5), described piston (5) is divided into rod chamber (10) and rodless cavity (11) with described cylinder barrel (2) inner chamber, described cylinder barrel (2) rear end is provided with hydraulic fluid port P, described hydraulic fluid port P communicates with described rodless cavity (11), it is characterized in that: cushion collar (4) is sleeved on and is in described rod chamber (10) one sides on the described piston rod (3), the inwall of described cushion collar (4) is ladder surface, circle is greater than circle in the ladder surface rear end in the ladder surface front end, the ladder surface inwall of described cushion collar (4) and described piston rod (3) ladder surface outer wall are Spielpassung, described cushion collar (4) can be at the axial and radial floating of described piston rod (3), described cushion collar (4) cylindrical is provided with symmetrical inclined-plane (9), and the sectional area of the front end on described symmetrical inclined-plane (9) is less than the sectional area of rear end; Described cushion collar (4) ear end face is provided with radially oil groove (8), described cylinder head (1) be provided with communicate with described rod chamber (11) and with the cushion hole (7) of described cushion collar (4) Spielpassung, described cylinder head (1) is provided with the hydraulic fluid port T that communicates with described cushion hole (7); The ear end face of described cylinder head (1) is provided with chamfering groove (12) and oil groove.
2. buffering hydraulic oil cylinder as claimed in claim 1, it is characterized in that: the oil groove that the ear end face of described cylinder head (1) is provided with is cross oil groove (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320159460 CN203201899U (en) | 2013-04-02 | 2013-04-02 | Buffering hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320159460 CN203201899U (en) | 2013-04-02 | 2013-04-02 | Buffering hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203201899U true CN203201899U (en) | 2013-09-18 |
Family
ID=49146010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320159460 Expired - Lifetime CN203201899U (en) | 2013-04-02 | 2013-04-02 | Buffering hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203201899U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156399A (en) * | 2015-08-24 | 2015-12-16 | 济南大学 | Self-adaptation sealing, anti-loosening and auxiliary motion device of hydraulic cylinder piston |
| CN105705801A (en) * | 2013-11-25 | 2016-06-22 | Ｋｙｂ株式会社 | Hydraulic cylinder |
| CN107165887A (en) * | 2017-07-07 | 2017-09-15 | 徐州徐工液压件有限公司 | A kind of oil storage hydraulic cylinder |
| CN110360180A (en) * | 2019-06-27 | 2019-10-22 | 三一重机有限公司 | Cavitation-preventive end cover structure, hydraulic cylinder and gas-tight etching method |
| CN111102268A (en) * | 2019-12-30 | 2020-05-05 | 宁波文泽机电技术开发有限公司 | Oil cylinder |
-
2013
- 2013-04-02 CN CN 201320159460 patent/CN203201899U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105705801A (en) * | 2013-11-25 | 2016-06-22 | Ｋｙｂ株式会社 | Hydraulic cylinder |
| CN105156399A (en) * | 2015-08-24 | 2015-12-16 | 济南大学 | Self-adaptation sealing, anti-loosening and auxiliary motion device of hydraulic cylinder piston |
| CN107165887A (en) * | 2017-07-07 | 2017-09-15 | 徐州徐工液压件有限公司 | A kind of oil storage hydraulic cylinder |
| CN110360180A (en) * | 2019-06-27 | 2019-10-22 | 三一重机有限公司 | Cavitation-preventive end cover structure, hydraulic cylinder and gas-tight etching method |
| CN111102268A (en) * | 2019-12-30 | 2020-05-05 | 宁波文泽机电技术开发有限公司 | Oil cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130918 |