CN201133394Y - Telescopic tube self-centering hydraulic oil cylinder - Google Patents
Telescopic tube self-centering hydraulic oil cylinder Download PDFInfo
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- CN201133394Y CN201133394Y CN 200720199486 CN200720199486U CN201133394Y CN 201133394 Y CN201133394 Y CN 201133394Y CN 200720199486 CN200720199486 CN 200720199486 CN 200720199486 U CN200720199486 U CN 200720199486U CN 201133394 Y CN201133394 Y CN 201133394Y
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- hydraulic cylinder
- oil hydraulic
- piston rod
- guide sleeve
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Abstract
The utility model relates to a telescopic tube self centering hydraulic cylinder, which is composed of an outer hydraulic cylinder, a guide sleeve of the outer hydraulic cylinder, an inner hydraulic cylinder, a guide sleeve of the inner hydraulic cylinder and a piston rod; wherein, the piston rod is arranged in the inner hydraulic cylinder; the guide sleeve of the inner hydraulic cylinder is arranged between the piston rod and the inner cylinder wall of the inner hydraulic cylinder; the inner hydraulic cylinder is positioned in the outer hydraulic cylinder; the guide sleeve of the outer hydraulic cylinder is positioned between the inner hydraulic cylinder and the inner cylinder wall of the outer hydraulic cylinder; the bottom of the outer hydraulic cylinder and the top of the piston rod are a hemispherical dome structure; a bottom fixed end and a top supporting end formed by the two semi-spheres cause the cylinder can make self centering in an upper concave spherical surface and a lower concave spherical surface and move around the pivot point of the concave spherical surface as well as support load in a designed free length. With the characteristics of self centering in an articulated type oil cylinder, few surface exposed parts in a welding type oil cylinder, large load bearing in a flange type oil cylinder, etc., in the self centering hydraulic cylinder, the characteristics are combined through the structural design, so the structure of the hydraulic cylinder is compact with the advantages of safe and reliable application and convenient installation and maintenance.
Description
Technical field:
The utility model relates to technical field of hydraulic oil cylinder, is a kind of telescopic tube self contering hydraulic jack specifically.
Background technique:
The hydraulic jack of prior art mainly is made up of cylinder body, piston, piston rod, guide sleeve and hydraulic oil pipe etc., guide sleeve is located in the piston cavity, its fixed end of piston rod and support end adopt ring and flat mostly, then by the fulcrum activity, in actual use, the piston rod activity of ring and flat is limited, for can not freely supporting load under the situation that changes length at oil cylinder.
The model utility content:
Technical problem to be solved in the utility model is to provide a kind of telescopic sleeve cylinder structure that improves and optimizates, the hydraulic piston oil cylinder that a plurality of interlocks will be arranged, at its fixed end and support end setting sphere, reach the telescopic tube self contering hydraulic jack that under oil cylinder changes the situation of length, can rely on the sphere self centering at oil cylinder two ends and freely support load in the length of setting around the fulcrum activity.
Technical problem to be solved in the utility model can be achieved through the following technical solutions:
Telescopic tube self contering hydraulic jack is by outer oil hydraulic cylinder, outer oil hydraulic cylinder guide sleeve, interior oil hydraulic cylinder, interior oil hydraulic cylinder guide sleeve and piston rod constitute, described piston rod is placed in the interior oil hydraulic cylinder, in described the oil hydraulic cylinder guide sleeve between described piston rod and described between the interior casing wall of oil hydraulic cylinder, oil hydraulic cylinder is placed in the described outer oil hydraulic cylinder in described, described outer oil hydraulic cylinder guide sleeve in described oil hydraulic cylinder and described outside between the interior casing wall of oil hydraulic cylinder, it is characterized in that, described outer oil hydraulic cylinder bottom and piston rod part are hemispherical dome structure, bottom fixed end that its two halves sphere constitutes and top braces end make oil cylinder and can support load in the free length of setting around the activity of concave spherical surface fulcrum in self contering in the concave spherical surface up and down.
Described outer oil hydraulic cylinder is by the seamless steel pipe manufacturing, bottom solder ball bottom, endoporus is smooth cylindrical body, oil hydraulic cylinder guide sleeve outside oil hydraulic cylinder top is equipped with outside described, described outer oil hydraulic cylinder guide sleeve is as the sealing and the support of interior oil hydraulic cylinder extension, described outer oil hydraulic cylinder guide sleeve inside is provided with first buffer cavity, offers the first taper dashpot on the internal chamber wall of described first buffer cavity; The top of described outer oil hydraulic cylinder is provided with first return opening, first circumferential weld that has suitable width between the outer casing wall of the interior casing wall of described outer oil hydraulic cylinder and described interior oil hydraulic cylinder, described first return opening is linked up mutually with described first circumferential weld, and the bottom of described outer oil hydraulic cylinder is provided with filler opening and buffering plunger;
Cylinder design becomes piston structure in described, the endoporus of interior oil hydraulic cylinder is smooth cylindrical body, oil hydraulic cylinder guide sleeve in oil hydraulic cylinder top is equipped with in described, the oil hydraulic cylinder guide sleeve is as the sealing and the support of piston rod extension in described, in described outside the oil hydraulic cylinder bottom of casing wall be provided with described outside the fluid relief cylinder that is complementary of first buffer cavity of oil hydraulic cylinder guide sleeve inside, the bottom of casing wall offers the bumper post consent that the described buffer plunger of appearance passes through outside the oil hydraulic cylinder in described, is provided with the second buffer piston chamber in the described interior hydraulic pilot cover; Have certain space between the interior casing wall of oil hydraulic cylinder bottom and described outer oil hydraulic cylinder bottom in described, be convenient to the pressure fluid medium and enter;
The bottom of described piston rod is a piston, the inner casing wall slip of oil hydraulic cylinder in being close to, the top of piston rod is smooth cylindrical body, second circumferential weld that has suitable width between the interior casing wall of described smooth cylindrical body and described interior oil hydraulic cylinder, described second circumferential weld forms the smooth cylindrical individual passage of piston rod, to realize through-flow and terminal suspending throttling fast; Be provided with the buffering cylinder between the smooth cylindrical body on the piston of described underpart of the piston rod and top, described buffering cylinder is provided with the second taper dashpot; Be provided with the 3rd buffer cavity that holds described buffer plunger insertion in the bottom of described piston rod; The central position of described piston rod is provided with drainback passage, and the upper end of described drainback passage offers and extends to the second outside refluxing opening, and described second circumferential weld is linked up in the lower end of described drainback passage;
Described the 3rd buffer cavity, bumper post consent and buffer plunger constitute damping device, have first slit between the internal chamber wall of described the 3rd buffer cavity and the outer wall of described buffer plunger, have second slit between the hole wall of the outer wall of described buffer plunger and described bumper post consent.
The sectional area S1 of first circumferential weld described in the utility model is greater than the sectional area S2 of described second circumferential weld.
Outer oil hydraulic cylinder bottom of the present utility model and piston rod part are hemispherical dome structure, bottom fixed end that its two halves sphere constitutes and top braces end make oil cylinder and can support load in the free length of setting around the activity of concave spherical surface fulcrum in self contering in the concave spherical surface up and down.Interior cylinder design becomes piston structure, under the working condition that satisfies the free indentation of oil cylinder energy, by the area of first circumferential weld between oil hydraulic cylinder in being provided with and the outer oil hydraulic cylinder and the area of second circumferential weld between interior oil hydraulic cylinder and the piston rod, active area when oil hydraulic cylinder is with the piston rod bidirectional-movement in making is different, the position of stretching out keeps bigger diameter to make it to bear bigger impact load and abominable external environment condition, fast and reliable during indentation.The utility model at interior hydraulic jack and piston rod at stroke near at the end, by reducing drainback passage, produce restriction effect, the oil back chamber after the throttling has higher back pressure, makes the active force relative equilibrium of pressure chamber and oil back chamber, reaches the purpose of buffering.
The beneficial effect that the utility model produces is: the telescopic tube self contering hydraulic jack that a kind of novelty is provided, it has absorbed the self contering of hinge oil cylinder and exposure part in welding type oil cylinder surface is few and the flange-type oil cylinder bears characteristics such as load is big, multiple characteristics are combined by structure Design, make the hydraulic cylinder structure compactness, safe and reliable, convenient for installation and maintenance.
Description of drawings:
Fig. 1 is the utility model telescopic tube self contering hydraulic jack outline drawing;
Fig. 2 is the structural representation of the utility model telescopic tube self contering hydraulic jack;
Fig. 3 is outer oil hydraulic cylinder guide sleeve structural representation;
Fig. 4 is interior hydraulic cylinder structure schematic representation;
Fig. 5 is Fig. 4 cross-sectional view;
Fig. 6 is the piston rod construction schematic representation;
Fig. 7 is Fig. 6 cross-sectional view;
Fig. 8 is interior oil hydraulic cylinder guide sleeve structural representation;
Fig. 9 is Fig. 8 cross-sectional view;
Among the figure: the outer oil hydraulic cylinder of 1-, the spherical bottom of 11-, 12-first return opening, oil hydraulic cylinder in the 13-filler opening, 2-, 21-fluid relief cylinder, 22-bumper post consent, 3-piston rod, 31-piston, the smooth cylindrical body of 32-, 33-cushions cylinder, the 34-second taper dashpot, 35-the 3rd buffer cavity, 36-drainback passage, 37-second refluxing opening, the outer oil hydraulic cylinder guide sleeve of 4-, 41-first buffer cavity, the 42-first taper dashpot, oil hydraulic cylinder guide sleeve in the 5-, the 51-second buffer piston chamber, 6-first circumferential weld, 7-buffer plunger, the 8-space, 9-second circumferential weld, 10-first slit, 101-second slit.
Embodiment:
Do further introduction below in conjunction with the drawings and specific embodiments:
As shown in Figure 2, telescopic tube self contering hydraulic jack comprises outer oil hydraulic cylinder 1, interior oil hydraulic cylinder 2, piston rod 3, outer oil hydraulic cylinder guide sleeve 4, interior oil hydraulic cylinder guide sleeve 5, piston rod 3 is installed in the interior oil hydraulic cylinder 2, interior oil hydraulic cylinder guide sleeve 5 is between the interior casing wall of piston rod 3 and interior oil hydraulic cylinder 2, interior oil hydraulic cylinder 2 is installed in the outer oil hydraulic cylinder 1, outer oil hydraulic cylinder guide sleeve 4 between interior oil hydraulic cylinder 2 and outside between the interior casing wall of oil hydraulic cylinder 1, outer oil hydraulic cylinder 1 bottom and piston rod 3 tops are hemispherical dome structure, bottom fixed end that its two halves sphere constitutes and top braces end make oil cylinder and can support load in the free length of setting around the activity of concave spherical surface fulcrum in self contering in the concave spherical surface up and down.
Referring to Fig. 2, outer oil hydraulic cylinder 1 is by the seamless steel pipe manufacturing, and bottom solder ball bottom 11, endoporus are smooth cylindrical body, and oil hydraulic cylinder 1 top is equipped with outer oil hydraulic cylinder guide sleeve 4 outside, and outer oil hydraulic cylinder guide sleeve 4 is as the sealing and the support of interior oil hydraulic cylinder extension.
Referring to Fig. 3, outer oil hydraulic cylinder guide sleeve 4 inside are provided with on the internal chamber wall of first buffer cavity, 41, the first buffer cavitys 41 and offer the first taper dashpot 42.
Referring again to Fig. 2, the top of outer oil hydraulic cylinder 1 is provided with first return opening 12, and first circumferential weld, 6, the first return openings 12 that have suitable width between the interior casing wall of outer oil hydraulic cylinder 1 and the outer casing wall of interior oil hydraulic cylinder 2 are linked up mutually with first circumferential weld 6.The bottom of oil hydraulic cylinder 1 is provided with filler opening 13 and buffering plunger 7 outside.
Referring to Fig. 4 and Fig. 5, interior oil hydraulic cylinder 2 is designed to piston structure, and its endoporus is smooth cylindrical body, oil hydraulic cylinder guide sleeve 5 in interior oil hydraulic cylinder 2 tops are equipped with, and interior oil hydraulic cylinder guide sleeve 5 is as the sealing and the support of piston rod 3 extensions.The bottom of casing wall is provided with the fluid relief cylinder 21 that first buffer cavity 41 with outer oil hydraulic cylinder guide sleeve 4 inside is complementary outside interior oil hydraulic cylinder 2, and the bottom of casing wall offers the bumper post consent 22 that appearance buffer plunger 7 passes through outside interior oil hydraulic cylinder 2.
Referring to Fig. 8 and Fig. 9, be provided with the second buffer piston chamber 51 in the interior hydraulic pilot cover 5.Referring again to Fig. 2, have certain space 8 between the interior casing wall of interior oil hydraulic cylinder 2 bottoms and outer oil hydraulic cylinder 1 bottom, be convenient to the pressure fluid medium and enter;
Referring to Fig. 6 and Fig. 7, the bottom of piston rod 3 is a piston 31, the inner casing wall slip of oil hydraulic cylinder 2 in being close to, the top of piston rod 3 is smooth cylindrical body 32, second circumferential weld 9 (referring to Fig. 1) that has suitable width between the interior casing wall of smooth cylindrical body 32 and interior oil hydraulic cylinder 2, second circumferential weld 9 forms the individual passage of the smooth cylindrical body 32 of piston rod, to realize through-flow and terminal suspending throttling fast; Be provided with buffering cylinder 33 between the piston 31 of piston rod 3 bottoms and the smooth cylindrical body 32 on top, buffering cylinder 33 is provided with the second taper dashpot 34; Be provided with the 3rd buffer cavity 35 that holds buffer plunger 7 insertions in the bottom of piston rod 3; The central position of piston rod 3 is provided with drainback passage 36, and the upper end of drainback passage 36 offers and extends to the second outside refluxing opening 37, and second circumferential weld 9 is linked up in the lower end of drainback passage 36; The sectional area S1 of first circumferential weld 6 is greater than the sectional area S2 of second circumferential weld 9.
Referring to Fig. 2, the 3rd buffer cavity 35, bumper post consent 22 and buffer plunger 7 constitute damping device, have first slit 10 between the outer wall of the internal chamber wall of the 3rd buffer cavity 35 and buffer plunger 7, have second slit 101 between the hole wall of the outer wall of buffer plunger 7 and bumper post consent 22.
Space 8 in the filler opening 13 of liquid fluid medium by outer oil hydraulic cylinder 1 bottom is injected between oil hydraulic cylinder 2 bottoms and the outer oil hydraulic cylinder 1, interior oil hydraulic cylinder 2 of promotion and piston rod 3 are protruding.Because the area of interior oil hydraulic cylinder 2 bottoms is greater than the area of piston rod 3 lower piston 31, the active force of the active force of oil hydraulic cylinder 2 bottoms on the piston 31 that acts on piston rod 3 bottoms in acting on, interior oil hydraulic cylinder 2 moves earlier and stretches out, and piston rod 3 is motionless.Outside the fluid relief cylinder on the interior oil hydraulic cylinder 2 21 arrives during first buffer cavity 41 of oil hydraulic cylinder guide sleeve 4 inside, liquid fluid medium in the chamber can only be by the first taper dashpot 42 on first buffer cavity 41 of outer oil hydraulic cylinder guide sleeve 4 inside, first circumferential weld 6 between the interior casing wall by outer oil hydraulic cylinder 1 and the outer casing wall of interior oil hydraulic cylinder 2 is back to first refluxing opening 12, along with the sectional area of the first taper dashpot 42 constantly dwindles, interior oil hydraulic cylinder 2 obtains buffering and stops.After interior oil hydraulic cylinder 2 stopped, the liquid fluid pressure medium in the outer oil hydraulic cylinder 1 further improved, and promotes piston rod 3 liftings.In the buffering cylinder 33 on the piston rod 3 enters into during second buffer cavity 51 of oil hydraulic cylinder guide sleeve 5, liquid fluid medium in the chamber can only be by the second taper dashpot 34 on the buffering cylinder 33 of piston rod 3, be back to second return opening 37 of piston rod 3 heads by the drainback passage 36 in second circumferential weld 9 and the piston rod 3, constantly lock is little when the sectional area of the second taper dashpot 34, and the motion of piston rod 3 obtains buffering and stops.
When liquid fluid medium motion direction is switched, enter into first circumferential weld 6 and second circumferential weld 9 simultaneously by first return opening 12 and second return opening 37, when filler opening 13 oil returns of outer oil hydraulic cylinder 1 bottom, oil hydraulic cylinder 2 and piston rod 3 retractions in promoting, because the sectional area S1 of first circumferential weld 6 is greater than the sectional area S2 of second circumferential weld 9, so the big interior oil hydraulic cylinder 2 in cross section bounces back earlier, piston rod 3 is motionless, during buffer plunger 7 outside interior oil hydraulic cylinder 2 returns in the oil hydraulic cylinder 1, the liquid fluid medium of interior oil hydraulic cylinder 2 can only be back to filler opening 13 by second slit 101 between buffer plunger 7 and the bumper post consent 22, and interior oil hydraulic cylinder 2 obtains buffering and stops.Piston rod 3 actions subsequently, when the 3rd buffer cavity 35 on the piston rod 3 returns to buffer plunger 7, liquid fluid medium in the 3rd buffer cavity 35 on the piston rod 3 can only be back to filler opening 13 by first slit 10 between buffer plunger 7 and the 3rd buffer cavity 35, and piston rod 3 obtains buffering and stops.
More than show and described basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. telescopic tube self contering hydraulic jack, by outer oil hydraulic cylinder, outer oil hydraulic cylinder guide sleeve, interior oil hydraulic cylinder, interior oil hydraulic cylinder guide sleeve and piston rod constitute, described piston rod is placed in the interior oil hydraulic cylinder, in described the oil hydraulic cylinder guide sleeve between described piston rod and described between the interior casing wall of oil hydraulic cylinder, oil hydraulic cylinder is placed in the described outer oil hydraulic cylinder in described, described outer oil hydraulic cylinder guide sleeve in described oil hydraulic cylinder and described outside between the interior casing wall of oil hydraulic cylinder, it is characterized in that, described outer oil hydraulic cylinder bottom and piston rod part are hemispherical dome structure, and bottom fixed end that its two halves sphere constitutes and top braces end make that oil cylinder can also can be around the activity of concave spherical surface fulcrum in self contering in the concave spherical surface up and down.
2, telescopic tube self contering hydraulic jack according to claim 1, it is characterized in that, described outer oil hydraulic cylinder is by the seamless steel pipe manufacturing, bottom solder ball bottom, endoporus is smooth cylindrical body, oil hydraulic cylinder guide sleeve outside oil hydraulic cylinder top is equipped with outside described, and described outer oil hydraulic cylinder guide sleeve is as the sealing and the support of interior oil hydraulic cylinder extension, described outer oil hydraulic cylinder guide sleeve inside is provided with first buffer cavity, offers the first taper dashpot on the internal chamber wall of described first buffer cavity; The top of described outer oil hydraulic cylinder is provided with first return opening, first circumferential weld that has suitable width between the outer casing wall of the interior casing wall of described outer oil hydraulic cylinder and described interior oil hydraulic cylinder, described first return opening is linked up mutually with described first circumferential weld, and the bottom of described outer oil hydraulic cylinder is provided with filler opening and buffering plunger;
Cylinder design becomes piston structure in described, the endoporus of interior oil hydraulic cylinder is smooth cylindrical body, oil hydraulic cylinder guide sleeve in oil hydraulic cylinder top is equipped with in described, the oil hydraulic cylinder guide sleeve is as the sealing and the support of piston rod extension in described, in described outside the oil hydraulic cylinder bottom of casing wall be provided with described outside the fluid relief cylinder that is complementary of first buffer cavity of oil hydraulic cylinder guide sleeve inside, the bottom of casing wall offers the bumper post consent that the described buffer plunger of appearance passes through outside the oil hydraulic cylinder in described, is provided with the second buffer piston chamber in the described interior hydraulic pilot cover; Have certain space between the interior casing wall of oil hydraulic cylinder bottom and described outer oil hydraulic cylinder bottom in described, be convenient to the pressure fluid medium and enter;
The bottom of described piston rod is a piston, the inner casing wall slip of oil hydraulic cylinder in being close to, the top of piston rod is smooth cylindrical body, second circumferential weld that has suitable width between the interior casing wall of described smooth cylindrical body and described interior oil hydraulic cylinder, described second circumferential weld forms the smooth cylindrical individual passage of piston rod, to realize through-flow and terminal suspending throttling fast; Be provided with the buffering cylinder between the smooth cylindrical body on the piston of described underpart of the piston rod and top, described buffering cylinder is provided with the second taper dashpot; Be provided with the 3rd buffer cavity that holds described buffer plunger insertion in the bottom of described piston rod; The central position of described piston rod is provided with drainback passage, and the upper end of described drainback passage offers and extends to the second outside refluxing opening, and described second circumferential weld is linked up in the lower end of described drainback passage;
Described the 3rd buffer cavity, bumper post consent and buffer plunger constitute damping device, have first slit between the internal chamber wall of described the 3rd buffer cavity and the outer wall of described buffer plunger, have second slit between the hole wall of the outer wall of described buffer plunger and described bumper post consent.
3, telescopic tube self contering hydraulic jack according to claim 2 is characterized in that, the sectional area S1 of described first circumferential weld is greater than the sectional area S2 of described second circumferential weld.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720199486 CN201133394Y (en) | 2007-12-19 | 2007-12-19 | Telescopic tube self-centering hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720199486 CN201133394Y (en) | 2007-12-19 | 2007-12-19 | Telescopic tube self-centering hydraulic oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201133394Y true CN201133394Y (en) | 2008-10-15 |
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ID=40061667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200720199486 Expired - Fee Related CN201133394Y (en) | 2007-12-19 | 2007-12-19 | Telescopic tube self-centering hydraulic oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201133394Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806315A (en) * | 2010-04-07 | 2010-08-18 | 长沙中联重工科技发展股份有限公司 | Compound oil cylinder and refuse compactor thereof |
| CN103216486A (en) * | 2013-04-18 | 2013-07-24 | 湖南华菱湘潭钢铁有限公司 | Hydraulic cylinder |
-
2007
- 2007-12-19 CN CN 200720199486 patent/CN201133394Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806315A (en) * | 2010-04-07 | 2010-08-18 | 长沙中联重工科技发展股份有限公司 | Compound oil cylinder and refuse compactor thereof |
| WO2011124123A1 (en) * | 2010-04-07 | 2011-10-13 | 长沙中联重工科技发展股份有限公司 | Composite oil cylinder and refuse compactor |
| CN103216486A (en) * | 2013-04-18 | 2013-07-24 | 湖南华菱湘潭钢铁有限公司 | Hydraulic cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081015 Termination date: 20111219 |