CN105179370A - Single-acting welded type four-stage oil cylinder - Google Patents
Single-acting welded type four-stage oil cylinder Download PDFInfo
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- CN105179370A CN105179370A CN201510524555.0A CN201510524555A CN105179370A CN 105179370 A CN105179370 A CN 105179370A CN 201510524555 A CN201510524555 A CN 201510524555A CN 105179370 A CN105179370 A CN 105179370A
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Abstract
The invention discloses a single-acting welded type four-stage oil cylinder which comprises an outer cylinder barrel, a primary cylinder barrel, a secondary cylinder barrel, a third-stage cylinder barrel and a piston rod assembly sequentially arranged in a sleeving manner from external to internal, wherein each of the primary cylinder barrel, the secondary cylinder barrel and the third-stage cylinder barrel is formed by welding a steel pipe, a piston and an internal limiting ring; the internal part of the end face of each steel pipe supports the corresponding internal limiting ring; the external part of the end face of each steel pipe is sleeved with the corresponding piston; the piston, the internal limiting ring and the end face of the steel pipe are assembled and welded to form a welding groove; an oil groove is formed in each piston in the axial direction, and a support circular groove is machined in the piston transversely. The single-acting welded type four-stage oil cylinder is more compact, adopts the welded type structure, is an integrity formed by welding the internal limiting rings, the pistons and the steel pipes, is small in chipping allowance, low in cost, simple in processing technology and high in efficiency; the pistons are machined after welding, so that the size of the support circular groove and the coaxiality of the support circular groove and the steel pipes are ensured, and the operational stationarity of the oil cylinder is ensured; the oil grooves are additionally formed in the pistons, so that the oil mass is increased, and the overall working efficiency of the oil cylinder is improved.
Description
Technical field
The present invention relates to multi-stage oil cylinder field, particularly relate to a kind of single-acting welding type level Four oil cylinder.
Background technique
Multi-stage oil cylinder is applicable to the occasion that stroke is large and mounting distance is little, thus in given installing space, realize the stroke longer than single stage hydraulic cylinder.Divide single-acting and double-action two kinds by the mode of action of hydraulic oil, when single-acting cylinder is overhanging, the jacking of depended on pressure oil, pushes back, as self-tipping type truck etc. by the deadweight of mechanism or spring force during retraction.Conventional multi-level oil cylinder is integrated step formula structure, cylinder barrel adopts step type and interior jump ring limit structure, cylinder barrel limit structure and cylinder barrel integrated, the length of endoporus step part accounts for the ratio of cylinder barrel overall length less than 10%, cylinder barrel machining allowance is large, and stock utilization is low, and work efficiency is low, cylinder barrel material multiselect hot-rolled pipe in addition, intensity is low.
Therefore need badly and provide a kind of novel single-action multi-stage oil cylinder structure to solve the problems referred to above.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of single-acting welding type level Four oil cylinder, and cylinder structure is compacter, and stock utilization is high.
For solving the problems of the technologies described above, the technological scheme that the present invention adopts is: provide a kind of single-acting welding type level Four oil cylinder, comprise be set with successively from outside to inside outer cylinder, one-level cylinder barrel, secondary cylinder barrel, three grades of cylinder barrels, piston-rod assemblies, one-level cylinder barrel, secondary cylinder barrel, three grades of cylinder barrels are welded to form by steel pipe, piston, interior limited ring, the end face inner support of steel pipe has interior limited ring, outer cover is connected to piston, piston, interior limited ring and Steel pipe end surface assembly welding form bevel for welding, piston is axially provided with oil groove, is laterally processed with support annular groove.
In a preferred embodiment of the present invention, the material selection drawn tube of described steel pipe, adds the intensity of cylinder barrel.
In a preferred embodiment of the present invention, one end of piston-rod assembly has filler opening, and when hydraulic oil enters from filler opening, the level Four cylinder barrel of oil cylinder is overhanging successively according to descending order; When oil cylinder pressure release, the outer power press-in of oil cylinder is retracted.
The invention has the beneficial effects as follows: cylinder structure of the present invention is compacter, adopt welded structure, chipping allowance is little, cost is low, processing technology is simple, efficiency is high, it is welded as a whole by interior limited ring, piston, steel pipe three part, interior limited ring, the interference fit of piston and steel pipe, reduces the distortion of postwelding steel pipe; Postwelding machining piston, ensure that the size of supporting annular groove, and supports the coaxality of annular groove and steel pipe, ensure that the stationarity of oil cylinder in running; Piston establishes oil groove newly, added oil mass, reduce the pressure loss, improve the whole work efficiency of oil cylinder.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of single-acting welding type level Four oil cylinder one of the present invention preferred embodiment;
Fig. 2 is the structural representation of described cylinder barrel;
Fig. 3 is the right elevation of Fig. 2;
In accompanying drawing, the mark of each parts is as follows: 1, outer cylinder, and 2, one-level cylinder barrel, 3, secondary cylinder barrel, 4, three grades of cylinder barrels, 5, piston-rod assembly, 51, filler opening, 6, steel pipe, 7, piston, 71, oil groove, 72, support annular groove, 8, interior limited ring, 9, bevel for welding.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
Refer to Fig. 1, the embodiment of the present invention comprises:
A kind of single-acting welding type level Four oil cylinder, comprise be set with successively from outside to inside outer cylinder 1, one-level cylinder barrel 2, secondary cylinder barrel 3, three grades of cylinder barrels 4, piston-rod assemblies 5.One end of piston-rod assembly 5 has filler opening 51, and when hydraulic oil enters from filler opening 51, the level Four cylinder barrel of oil cylinder is overhanging successively according to descending order; When oil cylinder pressure release, the outer power press-in of oil cylinder is retracted.
One-level cylinder barrel 2, secondary cylinder barrel 3, three grades of cylinder barrels 4 are welded to form by steel pipe 6, piston 7, interior limited ring 8, the end face inner support of steel pipe 6 has interior limited ring 8, outer cover is connected to piston 7, piston 7, interior limited ring 8 form bevel for welding 9 with steel pipe 6 end face assembly welding, piston 7 is axially provided with oil groove 71, is laterally processed with support annular groove 72.The drawn tube that steel pipe 6 material selection mechanical property in welding type cylinder barrel is more excellent, adds the intensity of cylinder barrel.Wherein, the quantity of oil groove 71 is determined according to the size requirements of cylinder barrel.
The present invention adopts welded structure, make cylinder structure compacter, chipping allowance is little, cost is low, processing technology is simple, efficiency is high, level Four cylinder barrel overhanging retraction time take welding type step location, rely on piston 7 to locate when level Four cylinder barrel is overhanging successively, located by interior limited ring 8 during retraction.All sequence is processed before welded steel pipe 6, piston 7, interior limited ring 8, the direct roll extrusion of steel pipe 6 endoporus or hone, the direct chromium plating of outer surface, piston 7 and interior limited ring 8 are worked into specified size, weld after processing sequence, greatly reduce blank machining allowance, improve the utilization ratio of material, reduce the manufacture difficulty of chromium plating frock, reduce cost, improve work efficiency simultaneously.During design welding cylinder barrel, consider that steel pipe 6 welds after processing sequence, ensure that the post welding distortion amount of steel pipe is within the tolerance range allowed, and adopts interference fit when therefore limited ring 8, piston 7, steel pipe 6 coordinate in designing, end face welds.Composition graphs 2, interior limited ring 8 supporting steel pipe 6 during welding, piston 7 receives compressed steel pipe 6, and groove welding is fitted in end face folding, in after making welding, limited ring 8, piston 7, steel pipe 6 three are merged, and postwelding steel pipe 6 amount of deformation little (within Measurement Allowance).When the interior limited ring 8 of interference fit and steel pipe 6 are assembled, adopt limited ring in cold charge and cooled with liquid nitrogen; When piston 7 and the steel pipe 6 of interference fit are assembled, hot charging is adopted namely to heat piston 7.Steel pipe 6, piston 7, interior limited ring 8 postwelding i.e. axial processing oil groove 71, horizontal process support annular groove 72 on piston 7, refer to Fig. 3, postwelding processing ensure that the coaxality supporting annular groove 72 and steel pipe 6, thus ensure that the stationarity of oil cylinder in running, eliminate welding to the impact supporting annular groove 72 simultaneously, ensure that postwelding supports size and the form and position tolerance of annular groove 72; Increase the mistake oil mass that namely oil groove 71 adds oil cylinder, reduce the pressure loss, improve the whole work efficiency of oil cylinder.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (3)
1. a single-acting welding type level Four oil cylinder, comprise be set with successively from outside to inside outer cylinder, one-level cylinder barrel, secondary cylinder barrel, three grades of cylinder barrels, piston-rod assemblies, it is characterized in that, one-level cylinder barrel, secondary cylinder barrel, three grades of cylinder barrels are welded to form by steel pipe, piston, interior limited ring, the end face inner support of steel pipe has interior limited ring, outer cover is connected to piston, piston, interior limited ring and Steel pipe end surface assembly welding form bevel for welding, piston is axially provided with oil groove, is laterally processed with support annular groove.
2. single-acting welding type level Four oil cylinder according to claim 1, is characterized in that, the material selection drawn tube of described steel pipe.
3. single-acting welding type level Four oil cylinder according to claim 1, it is characterized in that, one end of piston-rod assembly has filler opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510524555.0A CN105179370A (en) | 2015-08-21 | 2015-08-21 | Single-acting welded type four-stage oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510524555.0A CN105179370A (en) | 2015-08-21 | 2015-08-21 | Single-acting welded type four-stage oil cylinder |
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| CN105179370A true CN105179370A (en) | 2015-12-23 |
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| CN201510524555.0A Pending CN105179370A (en) | 2015-08-21 | 2015-08-21 | Single-acting welded type four-stage oil cylinder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111828433A (en) * | 2020-07-13 | 2020-10-27 | 胡单 | Multistage telescopic hydraulic cylinder |
| CN112122767A (en) * | 2020-09-01 | 2020-12-25 | 山东本图液压科技有限公司 | Integral step type multistage oil cylinder machining process |
| CN113944673A (en) * | 2021-10-20 | 2022-01-18 | 重庆铁马专用车有限公司 | Low-cost multistage sleeve type hydraulic oil cylinder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111828433A (en) * | 2020-07-13 | 2020-10-27 | 胡单 | Multistage telescopic hydraulic cylinder |
| CN112122767A (en) * | 2020-09-01 | 2020-12-25 | 山东本图液压科技有限公司 | Integral step type multistage oil cylinder machining process |
| CN113944673A (en) * | 2021-10-20 | 2022-01-18 | 重庆铁马专用车有限公司 | Low-cost multistage sleeve type hydraulic oil cylinder |
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Application publication date: 20151223 |
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| RJ01 | Rejection of invention patent application after publication |