CN204003757U - A kind of oil hydraulic cylinder without back cylinder cover - Google Patents
A kind of oil hydraulic cylinder without back cylinder cover Download PDFInfo
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- CN204003757U CN204003757U CN201420466837.0U CN201420466837U CN204003757U CN 204003757 U CN204003757 U CN 204003757U CN 201420466837 U CN201420466837 U CN 201420466837U CN 204003757 U CN204003757 U CN 204003757U
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Abstract
The utility model discloses a kind of oil hydraulic cylinder without back cylinder cover, comprise piston rod, cylinder body and seal arrangement, described piston rod is positioned at cylinder interior; Described piston rod middle part is provided with piston; Described cylinder upper end face is provided with Worm gear case; Described cylinder body is provided with oil outlet and oil inlet hole; Described seal arrangement comprises dust guard and oil-proof device; The dust guard being provided with between described cylinder body and piston rod is dust ring; The oil-proof device that described cylinder body is provided with is guidance tape; Described dust ring, guidance tape, the first seal ring and the second seal ring are all located in annular groove.The utility model can solve the undesirable problem of sealing effect that can solve well between cylinder body and cylinder cap on the one hand, can also reduce raw material and manufacturing procedure on the other hand, reduces costs, and has avoided the waste on resource and cost, enhances productivity.
Description
Technical field
The utility model belongs to hydraulic equipment field, specifically, relates to a kind of oil hydraulic cylinder without back cylinder cover.
Background technique
Oil hydraulic cylinder (claiming again oil cylinder) is a kind of executive component conventional in hydraulic system, is the pressure energy of liquid to be changed into the device of mechanical energy, is mainly used in realizing the straight reciprocating motion of mechanism, also can realize swing, it is simple in structure, and reliable operation is widely used.
Seal arrangement is the leakage (inside let out and leak) that prevents working medium and prevents that extraneous foreign matter (as air, dust and water etc.) from entering the mechanism of hydraulic element and hydraulic system.Although Sealing is the auxiliary in hydraulic equipment, sealing and the quality of seal arrangement are directly to have influence on one of key that can hydraulic system normally work.The quality of Sealing has restricted the raising of hydraulic element and hydraulic system Performance And Reliability energy to a certain extent, the length in working life, and having influence on that hydraulic equipment improves grade and upper level and the key point that takes part in international competition, this is also one of principal element of domestic and international hydraulic pressure original paper mass discrepancy.The loss that often inefficacy of indivedual Sealings causes may be the thousands of times that Sealing itself is worth.
Three places of oil hydraulic cylinder internals are that the emphasis of sealing is local, this three place respectively: the sealing between the sealing between cylinder body and piston, cylinder body and piston rod, and the sealing between cylinder body and end cap.Wherein, the sealing between cylinder body and end cap comprises dust sealing and grease proofing leakage seal.If the sealing between cylinder body and end cap is not ideal enough, can causes leaking of cylinder body, thereby affect the normal operation of cylinder device.
The quality of the seal arrangement performance of oil hydraulic cylinder, for the normal operation of cylinder device, seems it is very important.For example, Chinese Patent Application No.: 201210020162.2, the applying date: on 01 29th, 2012, this use is novel discloses a kind of oil hydraulic cylinder with sealing follow-up device, comprise piston, seal and follow ring, snap ring and hydraulic cylinder, wherein said sealing is followed ring and is fixed on described piston by snap ring; Wherein said sealing is followed ring endoporus one end for the circular cone hole with seam, the other end is the cylindrical hole with helical oil groove, described sealing is followed on ring cylindrical and is had closure gasket groove, and described closure gasket groove is followed ring oil inlet hole with a plurality of sealings on the flange with described circular cone hole opposite side; Between the outer conical surface of described circular cone hole and described piston rodless side, form sealing and follow ring internal pressure oil pocket, and described sealing is followed ring internal pressure oil pocket and is connected with oil hydraulic cylinder rodless side oil pocket by helical oil groove, described sealing is followed on ring cylindrical and is had closure gasket groove, L shaped sealing is housed in described closure gasket groove, O shape sealing in L shaped sealing is housed between described L shaped sealing inner circle and described closure gasket groove.
The cylinder body end of oil hydraulic cylinder is generally provided with cylinder end caps, and the contact length of cylinder body and cylinder end caps can affect the sealing effect between cylinder body and end cap.Reduce the contact length between the two, can be so that better sealing between cylinder body and end cap.For example, Chinese Patent Application No.: 201020196410.5, the applying date: on 05 19th, 2010.The novel Hermetical connecting structure that discloses a kind of oil hydraulic cylinder cylinder sleeve and cylinder cap of this use.This model utility belongs to oil hydraulic cylinder technical field, relates in particular to the Hermetical connecting structure of a kind of oil hydraulic cylinder cylinder sleeve and cylinder cap.Above-mentioned Hermetical connecting structure comprises the flange plate that is arranged on the outer side surface of cylinder sleeve end, is arranged on the flange on cylinder cap inner side surface and above-mentioned cylinder cap is connected to the bolt on cylinder sleeve; In addition, on described flange, along one week, one conical surface is set; Another conical surface that cooperatively interacts and be connected with the above-mentioned conical surface is set on the end face of cylinder sleeve.This model utility has simple in structure, and sealing is reliable, the advantage of fast and easy dismounting.
Poorly sealed meeting between cylinder body and cylinder cap causes leaking of cylinder device.The generation once leak, whole cylinder device cannot normally move.Joint contact length between hydraulic cylinder body and cylinder cap can affect the sealing effect between the two.Contact length between the two reduces, and sealing effect will be better.But the sealing place circular groove of the cylinder body of the oil hydraulic cylinder of existing market and cylinder cap is to be all opened on cylinder cap, causing joint contact length is all cylinder body and the sealing effect between cylinder cap bad of long, such oil hydraulic cylinder.So solve the undesirable problem of sealing effect between cylinder body and cylinder cap in the urgent need to a sets of plan.
Summary of the invention
The problem that 1, will solve
Once for the generation that leaks of the sealing between cylinder body in prior art and cylinder cap, whole cylinder device cannot normally move, the sealing place circular groove of the cylinder body of the oil hydraulic cylinder of existing market and cylinder cap is to be all opened on cylinder cap, it is all long causing joint contact length, the cylinder body of such oil hydraulic cylinder and the sealing effect between cylinder cap bad problem, the utility model provides a kind of oil hydraulic cylinder without back cylinder cover, it not only can solve the undesirable problem of sealing effect that can solve well between cylinder body and cylinder cap, but also can reduce raw material and manufacturing procedure, reduce costs, avoided the waste on resource and cost, enhance productivity.
2, technological scheme
For addressing the above problem, the technological scheme that the utility model provides is as follows.
Without an oil hydraulic cylinder for back cylinder cover, comprise piston rod, cylinder body and seal arrangement, described piston rod is positioned at cylinder interior; Between described cylinder body and piston rod, be provided with the first seal ring and the second seal ring; Described piston rod middle part is provided with piston; Described piston and cylinder body Spielpassung; Described cylinder body upper end is provided with worm gear device; Described cylinder upper end face is provided with Worm gear case; Described cylinder body is provided with oil outlet and oil inlet hole; Described seal arrangement comprises dust guard and oil-proof device; The dust guard being provided with between described cylinder body and piston rod is dust ring; The oil-proof device that described cylinder body is provided with is guidance tape; Described dust ring, guidance tape, the first seal ring and the second seal ring are all located in annular groove.
Preferably, described oil inlet hole diameter is less than oil outlet diameter, and oil inlet hole is positioned at the below of oil outlet.
Preferably, between described cylinder body and Worm gear case, Placement is welding.
Preferably, between described piston rod and cylinder body, form cavity, oil inlet hole and this cavity join.
Preferably, above described piston, be provided with piston end cap; Described piston end cap, piston and cylinder body form cavity, and oil outlet and this cavity join.
Preferably, between described piston and cylinder body, be provided with guidance tape and seal ring.
Preferably, described dust ring material is polyurethane.
3, beneficial effect
Than prior art, the beneficial effects of the utility model are:
(1) the utility model comprises piston rod, cylinder body and seal arrangement, and piston rod is positioned at cylinder interior; Between cylinder body and piston rod, be provided with the first seal ring and the second seal ring; Piston rod middle part is provided with piston; Piston and cylinder body Spielpassung; Cylinder body upper end is provided with worm gear device; Cylinder upper end face is provided with Worm gear case; Cylinder body is provided with oil outlet and oil inlet hole; Seal arrangement comprises dust guard and oil-proof device; The dust guard being provided with between cylinder body and piston rod is dust ring; The oil-proof device that cylinder body is provided with is guidance tape; Dust ring, guidance tape, the first seal ring and the second seal ring are all located in annular groove; Guidance tape has played the effect of guiding, in order to prevent cylinder barrel and piston rod wearing and tearing; Seal arrangement has well played the effect of dustproof and grease proofing leakage; Of the present utility model preventing dust is opened on cylinder body with oily circular groove, makes sealing effect better;
(2) the utility model oil inlet hole diameter is less than oil outlet diameter, and oil inlet hole is positioned at the below of oil outlet; Oil inlet hole diameter is less than oil outlet diameter, makes oil-feed velocity-stabilization, hydraulic cylinder works stable performance; And Extraction rate is fast, better improved working efficiency;
(3) between the utility model cylinder body and Worm gear case, Placement is welding; Welding between cylinder body and Worm gear case makes cylinder device sealing effect more desirable;
(4) between the utility model piston rod and cylinder body, form cavity, oil inlet hole and this cavity join; Hydraulic oil in oil sump tank enters cylinder device from oil inlet hole, makes cylinder device better hydraulic energy be changed into mechanical energy, does straight reciprocating motion (or oscillating motion);
(5) above the utility model piston, be provided with piston end cap; Piston end cap, piston and cylinder body form cavity, and oil outlet and this cavity join; Oil in oil hydraulic cylinder is gone out from oil outlet, and the piston rod of realizing in oil hydraulic cylinder back moves;
(6) between the utility model piston and cylinder body, be provided with guidance tape and seal ring; Guidance tape is that leading role has been played in the motion of piston, and the seal ring Main Function arranging between piston and cylinder body is the gap between packed-piston and cylinder barrel, prevents the interior leakage of hydraulic oil etc.;
(7) the utility model dust ring material is polyurethane; The Main Function of dust ring is to remove reciprocating piston bar to be exposed at the dirts such as dust accompanying on cylinder outer surface, sand-lime, rainwater and frost, prevents that external dust, rainwater from entering sealing mechanism inside; Polyurethane is drawn and is not hindered, noise free; Long service life, reduces cost.
Accompanying drawing explanation
Fig. 1 is structural front view of the present utility model;
Fig. 2 is structure plan view of the present utility model.
In figure: 1, dust ring; 2, guidance tape; 3, the first seal ring; 4, the second seal ring; 5, piston rod; 6, piston; 7, cylinder body; 8, worm gear device; 9, Worm gear case; 10, oil outlet; 11, oil inlet hole.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
Embodiment 1
As depicted in figs. 1 and 2, a kind of oil hydraulic cylinder without back cylinder cover, comprises piston rod 5, cylinder body 7 and seal arrangement, and piston rod 5 is positioned at cylinder body 7 inside; Between cylinder body 7 and piston rod 5, be provided with the first seal ring 3 and the second seal ring 4; Piston rod 5 middle parts are provided with piston 6; Piston 6 and cylinder body 7 Spielpassung; Cylinder body 7 upper ends are provided with worm gear device 8; Cylinder body 7 upper-end surfaces are provided with Worm gear case 9; Cylinder body 7 is provided with oil outlet 10 and oil inlet hole 11; Seal arrangement comprises dust guard and oil-proof device; The dust guard being provided with between cylinder body 7 and piston rod 5 is dust ring 1; The oil-proof device that cylinder body 7 is provided with is guidance tape 2; Dust ring 1, guidance tape 2, the first seal ring 3 and the second seal ring 4 are all located in annular groove.Oil inlet hole 11 diameters are less than oil outlet 10 diameters, and oil inlet hole 11 is positioned at the below of oil outlet 10.Between cylinder body 7 and Worm gear case 9, Placement is welding.Between piston rod 5 and cylinder body 7, form cavity, oil inlet hole 11 joins with this cavity.Piston 6 is provided with piston end cap above; Piston end cap, piston 6 and cylinder body 7 form cavity, and oil outlet 10 and this cavity join.Between piston 6 and cylinder body 7, be provided with guidance tape and seal ring.Dust ring 1 material is polyurethane.
In the present embodiment, when hydraulic cylinder body 7 does not have one end oil-feed of piston rod 5, i.e. rodless cavity oil-feed, has one end oil return of piston rod 5, and piston rod 5 can stretch out in cylinder body 7; When there being piston rod 5 one end oil-feeds, i.e. rod chamber oil-feed, piston-rodless 5 one end oil returns, piston rod 5 can be to the interior retraction of cylinder body 7.It not only can solve the undesirable problem of sealing effect that can solve well between cylinder body and cylinder cap, but also can reduce raw material and manufacturing procedure, reduces costs, and has avoided the waste on resource and cost, enhances productivity.
Claims (7)
1. without an oil hydraulic cylinder for back cylinder cover, comprise piston rod (5), cylinder body (7) and seal arrangement, described piston rod (5) is positioned at cylinder body (7) inside; It is characterized in that: between described cylinder body (7) and piston rod (5), be provided with the first seal ring (3) and the second seal ring (4); Described piston rod (5) middle part is provided with piston (6); Described piston (6) and cylinder body (7) Spielpassung; Described cylinder body (7) upper end is provided with worm gear device (8); Described cylinder body (7) upper-end surface is provided with Worm gear case (9); Described cylinder body (7) is provided with oil outlet (10) and oil inlet hole (11); Described seal arrangement comprises dust guard and oil-proof device; The dust guard being provided with between described cylinder body (7) and piston rod (5) is dust ring (1); The oil-proof device that described cylinder body (7) is provided with is guidance tape (2); Described dust ring (1), guidance tape (2), the first seal ring (3) and the second seal ring (4) are all located in annular groove.
2. a kind of oil hydraulic cylinder without back cylinder cover according to claim 1, is characterized in that: described oil inlet hole (11) diameter is less than oil outlet (10) diameter, and oil inlet hole (11) is positioned at the below of oil outlet (10).
3. a kind of oil hydraulic cylinder without back cylinder cover according to claim 1, is characterized in that: between described cylinder body (7) and Worm gear case (9), Placement is welding.
4. a kind of oil hydraulic cylinder without back cylinder cover according to claim 1, is characterized in that: between described piston rod (5) and cylinder body (7), form cavity, oil inlet hole (11) joins with this cavity.
5. a kind of oil hydraulic cylinder without back cylinder cover according to claim 1, is characterized in that: described piston (6) is provided with piston end cap above; Described piston end cap, piston (6) and cylinder body (7) form cavity, and oil outlet (10) and this cavity join.
6. a kind of oil hydraulic cylinder without back cylinder cover according to claim 1, is characterized in that: between described piston (6) and cylinder body (7), be provided with guidance tape and seal ring.
7. according to a kind of oil hydraulic cylinder without back cylinder cover described in any one in claim 1-6, it is characterized in that: described dust ring (1) material is polyurethane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420466837.0U CN204003757U (en) | 2014-08-18 | 2014-08-18 | A kind of oil hydraulic cylinder without back cylinder cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420466837.0U CN204003757U (en) | 2014-08-18 | 2014-08-18 | A kind of oil hydraulic cylinder without back cylinder cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204003757U true CN204003757U (en) | 2014-12-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420466837.0U Expired - Fee Related CN204003757U (en) | 2014-08-18 | 2014-08-18 | A kind of oil hydraulic cylinder without back cylinder cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204003757U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108953278A (en) * | 2018-08-03 | 2018-12-07 | 马鞍山市华洋机械刃具有限公司 | A kind of oil cylinder for hydraulic press brakes of novel adjustable stroke |
| CN110594237A (en) * | 2019-09-27 | 2019-12-20 | 武汉理工大学 | Simple energy-saving hydraulic cylinder with variable stroke |
-
2014
- 2014-08-18 CN CN201420466837.0U patent/CN204003757U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108953278A (en) * | 2018-08-03 | 2018-12-07 | 马鞍山市华洋机械刃具有限公司 | A kind of oil cylinder for hydraulic press brakes of novel adjustable stroke |
| CN110594237A (en) * | 2019-09-27 | 2019-12-20 | 武汉理工大学 | Simple energy-saving hydraulic cylinder with variable stroke |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20210818 |
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| CF01 | Termination of patent right due to non-payment of annual fee |