CN101949398A - Single-action hydraulic oil cylinder and paver with same - Google Patents
Single-action hydraulic oil cylinder and paver with same Download PDFInfo
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- CN101949398A CN101949398A CN2010102792257A CN201010279225A CN101949398A CN 101949398 A CN101949398 A CN 101949398A CN 2010102792257 A CN2010102792257 A CN 2010102792257A CN 201010279225 A CN201010279225 A CN 201010279225A CN 101949398 A CN101949398 A CN 101949398A
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Abstract
The invention provides a single-action hydraulic oil cylinder and a paver with the same. The single-action hydraulic oil cylinder comprises a cylinder body, a piston arranged in the cylinder body and a piston rod connected with the piston, and the piston is provided with a throttle orifice used for communicating a rod cavity with a rodless cavity of the cylinder body. The single-action hydraulic oil cylinder has the advantages of simple structure and fast expansion speed. The paver of the invention is used for controlling the opening degree of a hopper by applying the single-action hydraulic oil cylinder.
Description
Technical field
The present invention relates to Hydraulic Field, more specifically, relate to a kind of single-acting hydraulic jack and have the paver of this oil cylinder.
Background technique
The single-acting hydraulic jack of prior art comprises: cylinder body, piston, piston rod.Piston is arranged in the cylinder body.One end of piston rod is connected with piston, and the other end passes cylinder body.The hydraulic fluid port of single-acting hydraulic jack is opened in the rodless cavity end of cylinder body.The piston rod of hydraulic jack is done when the hydraulic fluid port oil-feed and is stretched out action, does the withdrawal action under external force.The stretching speed of the piston rod of above-mentioned single-acting hydraulic jack is slower, has reduced the working efficiency of the equipment that uses above-mentioned hydraulic jack.
Summary of the invention
The present invention aims to provide a kind of single-acting hydraulic jack and has the paver of this oil cylinder, with the slower problem of the stretching speed that solves single-acting hydraulic jack of the prior art.
According to an aspect of the present invention, provide a kind of single-acting hydraulic jack, having comprised: cylinder body, be arranged on the piston rod that the piston in the cylinder body is connected with piston, offer the rod chamber of connection cylinder body and the throttle orifice of rodless cavity on the piston.
Further, the single-acting hydraulic jack is a multistage hydraulic cylinder, is equipped with throttle orifice on the pistons at different levels of multistage hydraulic cylinder.
Further, multistage hydraulic cylinder is the two-stage hydraulic jack, comprising: the one-level hydraulic jack, and it comprises: the one-level cylinder body of hollow, the first stage piston bar that is arranged on that first stage piston in the one-level cylinder body is connected with first stage piston and passes from the one-level cylinder body; First stage piston is provided with the one-level throttle orifice, and the rodless cavity end of one-level cylinder body is provided with hydraulic fluid port; The 2-level hydraulic oil cylinder, it comprises: the secondary cylinder body of hollow, the secondary cylinder body is formed by first stage piston bar and first stage piston; Be arranged on the second piston in the secondary cylinder body; The second piston rod that is connected with second piston and passes from the outer end of first stage piston bar, second piston is provided with the two-step throttle hole.
Further, the casing wall of secondary cylinder body is provided with the bounding means that is used for the stop second piston.
Further, the casing wall of secondary cylinder body is provided with first annular groove, and bounding means is the spacing snap ring of elasticity that is mounted to first annular groove.
Further, the secondary cylinder body casing wall on also be provided with second annular groove and be installed in positioning ring in second annular groove; Be folded with stiffening ring between spacing snap ring of elasticity and the positioning ring.
Further, first stage piston and first stage piston bar are integral structure; Second piston and second piston rod are spirally connected.
Further, throttle orifice is a plurality of, evenly arranges on piston.
Further, the external diameter of first stage piston is D1, and the external diameter of first stage piston bar is d1, and the one-level throttle orifice is N1 the through hole that radius is R1; The external diameter of second piston is D2, and the external diameter of second piston rod is d2, and the two-step throttle hole is N2 the through hole that radius is R2; Wherein, N1 and N2 are the integer greater than 0, and satisfy
According to another aspect of the present invention, also provide a kind of paver, comprised above-mentioned single-acting hydraulic jack.
According to technological scheme of the present invention, owing on piston, offer the rod chamber of connection cylinder body and the throttle orifice of rodless cavity, during the rodless cavity hydraulic fluid port oil-feed of hydraulic jack, promote piston rod and do and stretch out action, part hydraulic oil enters the rod chamber from rodless cavity by throttle orifice simultaneously.When piston moves to a certain position, be full of hydraulic oil in the rod chamber, and piston continues towards rod chamber to move under the impetus of rodless cavity hydraulic oil, at this moment, the hydraulic oil of rod chamber is back in the rodless cavity by throttle orifice under pressure, thereby the two ends at piston form differential force, impel piston to drive piston rod and quicken to do to stretch out motion, have accelerated the speed of stretching out of piston rod.In like manner, when hydraulic jack is done the withdrawal action, the hydraulic oil of rodless cavity flow in the rod chamber by throttle orifice, accelerated the contraction speed of piston rod, so overcome the slower problem of piston rod stretching speed of the single-action hydraulic cylinder of prior art, reached the effect that improves the working efficiency of piston rod with this single-acting hydraulic jack.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 has schematically shown the cross-section structure according to single-acting hydraulic jack of the present invention;
Fig. 2 has schematically shown the local amplification profile structure according to single-acting hydraulic jack of the present invention.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Referring to Fig. 1 and Fig. 2, show preferred embodiment according to single-acting hydraulic jack of the present invention, as shown in the figure, this single-acting hydraulic jack is a two-stage single-acting hydraulic jack.This two-stage single-acting hydraulic jack comprises one-level hydraulic jack and 2-level hydraulic oil cylinder.
Wherein the one-level hydraulic jack comprises the one-level cylinder body 5 of hollow, the one-level sliding cavity 1 that the first stage piston 10 that the hollow cavity formation of one-level cylinder body 5 Gong sets within it moves; First stage piston bar 12, its first end is connected with first stage piston 10, and second end passes from an end of one-level cylinder body 5.First stage piston 10 and first stage piston bar 12 are divided into one-level rod chamber and one-level rodless cavity with one-level cylinder body 5, and the hydraulic fluid port 3 of hydraulic jack is opened in the one-level rodless cavity end of one-level cylinder body 5.Preferably first stage piston 10 and first stage piston bar 12 are integral structure, with simplified structure.
The 2-level hydraulic oil cylinder comprises the secondary cylinder body of hollow, and the secondary cylinder body is formed by first stage piston 10 and the first stage piston bar 12 that the centre offers the secondary sliding cavity 2 that communicates; Be arranged on the second piston 20 of secondary sliding cavity 2; One end is connected with second piston 20, the second piston rod 22 that the other end stretches out from the outer end of first stage piston bar 12.Second piston 20 and second piston rod 22 are divided into secondary rod chamber and secondary rodless cavity with secondary sliding cavity 2, and certainly, the secondary rodless cavity is communicated with the one-level rodless cavity.Preferably, be screwed onto together after second piston 20 and the second piston rod 22 split manufacturings,, save cost to reduce manufacture difficulty.
Be appreciated that in conjunction with the accompanying drawings, when hydraulic fluid port 3 to the oiling of one-level rodless cavity, because of the hydraulic jack outside stressed, hydraulic oil at first promotes first stage piston 10 to be made first stage piston bar 12 to stretch out action, simultaneously, part hydraulic oil enters in the one-level rod chamber by one-level throttle orifice 11, when first stage piston 10 runs to certain position, fill with hydraulic oil in the one-level rod chamber, and first stage piston 10 continues to move to one-level rod chamber direction under the promotion of one-level rodless cavity hydraulic oil, this moment, the hydraulic oil of one-level rod chamber was back to again in the one-level rodless cavity by one-level throttle orifice 11 under pressure, two ends at first stage piston 10 form differential force, impel first stage piston 10 to quicken, and then accelerated the speed of stretching out of first stage piston bar 12 to the moving of one-level rod chamber direction.
The effect in two-step throttle hole 21 is identical with the effect of one-level throttle orifice 11, and the stroke that stretches out when first stage piston bar 12 finishes, hydraulic oil promote second piston 20 and second piston rod 22 do stretch out mobile.When in second piston 20 moves to the secondary rod chamber, being full of the position of hydraulic oil, move to secondary rod chamber direction under the promotion of second piston 20 continuation hydraulic oil in the secondary rodless cavity, the hydraulic oil of secondary rod chamber is back to the secondary rodless cavity from two-step throttle hole 21, the two ends of second piston 20 form differential force, impel second piston 20 to quicken to move to secondary rod chamber direction, accelerated the speed of stretching out of second piston rod 22, thereby improved the working efficiency of hydraulic jack on the whole, it is opened fast put in place, improved the working efficiency of the equipment of using this hydraulic jack.
Certainly, when under external force, when the piston rod of hydraulic jack is done retracting motion, second piston rod 22 drive second pistons 20 are at first done retraction and are moved, this moment, the oil of secondary rodless cavity entered in the secondary rod chamber by two-step throttle hole 21, same because differential reason, can accelerate the retraction speed of second piston rod 22, after second piston rod 22 withdrawal shape journeys finish, first stage piston bar 12 begins retraction, the hydraulic oil of one-level rodless cavity enters in the one-level rod chamber by one-level throttle orifice 11, under the differential force effect, first stage piston bar 12 retraction fast puts in place, has promptly improved the working efficiency of hydraulic jack on the whole by the mode of offering throttle orifice on first stage piston and second piston, it is shunk fast put in place, improved the working efficiency of the equipment of using this hydraulic jack.
A kind of preferred structure of one-level cylinder body 5 has been shown among Fig. 1, one-level cylinder body 5 comprise an end opening barrel shaped structure 50, be positioned at the guide sleeve 52 of barrel shaped structure 50 opening ends, and the union (screwed)bonnet (UB 54 that is screwed onto the barrel shaped structure opening end.Guide sleeve 52 is arranged between barrel shaped structure 50 and the first stage piston bar 12 and by union (screwed)bonnet (UB 54 and is fixed on the barrel shaped structure 50, so that first stage piston bar 12 is stable, barrel shaped structure 50 forms the one-level sliding cavity 1 that supplies first stage piston 10 activities with guide sleeve 52.Adopt the one-level cylinder body 5 of said structure can take out first stage piston 10 and first stage piston bar 12 easily, thereby be convenient to maintain and replace.
For avoiding second piston 20 when doing retracting motion, to break away from secondary sliding cavity 2, cause the unnecessary damage of hydraulic jack, influence the working efficiency of paver.The casing wall that forms the cylinder body of secondary sliding cavity 2 is provided with the bounding means 4 that is used for the stop second piston.Preferably, bounding means 4 is the spacing snap ring 4 of elasticity in first annular groove of the casing wall that is installed in the secondary cylinder body, and the spacing snap ring 4 of elasticity can be avoided second piston 20 damage of colliding with.Simultaneously, for strengthening the rigidity of the spacing snap ring 4 of elasticity, avoid spacing snap ring 4 excessive deformations of elasticity can not be to second piston 20 spacing stop, on the casing wall of secondary cylinder body, also be provided with second annular groove and the positioning ring 42 that is installed in second annular groove, be folded with stiffening ring 40 between spacing snap ring 4 of elasticity and the positioning ring 42.Positioning ring 42 and stiffening ring 40 for example are stiffening ring; a kind of mode of execution of stiffening ring 40 as can be seen from Figure; the spacing snap ring 4 of stiffening ring 40 semi-surrounding elasticity; thereby in the buffer protection function that does not influence the spacing snap ring 4 of elasticity, can also avoid the excessive deformation of the spacing snap ring 4 of elasticity effectively.
Preferably, one-level throttle orifice 11 is a plurality of, evenly arranges on first stage piston 10; Two-step throttle hole 21 is a plurality of, evenly arranges on second piston 20, be convenient to like this to make and also can strengthen each rodless cavity with its corresponding rod chamber between hydraulic oil mobile.
In addition, because of first stage piston bar 12 and second piston rod 22 under the effect of separately throttle orifice, the process that a differential speed change is all arranged, for making first stage piston bar 12 identical with the speed of second piston rod 22 before differential speed change, first stage piston bar 12 is also identical with the speed of second piston rod 22 after differential speed change, make the speed of stretching out of each piston rod of hydraulic jack present regularity, be convenient to operator and observe operation, in the present embodiment, the external diameter of first stage piston 10 is D 1, the external diameter of first stage piston bar 12 is d1, the through hole that one-level throttle orifice 11 is R1 for 1 radius of N; The external diameter of second piston 20 is D2, and the external diameter of second piston rod 22 is d2, and two-step throttle hole 21 is N2 the through hole that radius is R2; Wherein, N1 and N2 are the integer greater than 0, and satisfy
Promptly can realize the above-mentioned constant speed process of first stage piston bar and second piston rod.
In this city embodiment, the stroke of first stage piston bar 12 and second piston rod 22 equates.In addition, for avoiding the leakage of hydraulic oil, between one-level cylinder body and first stage piston 10, between secondary cylinder body and the second piston 20, between guide sleeve 52 and the first stage piston cylinder 1 all the position sealing configuration is arranged.
Need to prove that single-acting hydraulic jack according to the present invention is an example with the two-stage hydraulic jack, on the two-stage piston, all offer the throttle orifice that is communicated with its corresponding rod chamber and rodless cavity, with the effect of the stretching speed that reaches the piston rod that improves each piston correspondence.Certainly single-acting hydraulic jack according to the present invention is not limited to the two-stage hydraulic jack, for example can be for the single-stage hydraulic jack or for being at least the multistage hydraulic cylinder of two-stage.For multistage hydraulic cylinder, can on pistons at different levels, be provided with throttle orifice, also can on the part piston, throttle orifice be set, can reach and improve the effect that the single-acting hydraulic cylinder piston rod stretches out speed, and multistage hydraulic cylinder advantages such as to have installation volume little, and the total extrusion of piston rod is long.
The present invention also provides a kind of paver, comprises above-mentioned single-acting hydraulic jack, is used to control the folding degree of hopper.
As shown in the figure, be example with the single-acting two-stage hydraulic oil cylinder in the embodiment of the invention, be provided with hinging hole 56 in the outer end of one-level cylinder body 5 and the outer end of second piston rod 22, hinged with paver fuselage and hopper respectively.By above as can be seen, the single-acting hydraulic jack is fuel-displaced because have only a hydraulic fluid port to be used for oil-feed, and it is the folding of may command hopper that paver only need be provided with the external oil circuit that and this hydraulic fluid port be communicated with, thereby has simplified the oil circuit of paver.And when the hydraulic fluid port 3 of above-mentioned external oil circuit by one-level rodless cavity end during to the oil-feed of one-level rodless cavity, two- stage piston rod 12,22 stretches out successively, and the little extrusion of the volume that hydraulic jack takies is long, can increase the folding degree of hopper.In addition, the saved installing space of hydraulic jack can be used for increasing the cavity volume of hopper, storing more material, and then reaches the effect of the working efficiency that improves paver.
In sum, generally adopt double-action single-stage hydraulic jack to control the technology of hopper folding with respect to paver in the prior art, the paver of using hydraulic jack of the present invention can make the maximization of hopper of paver folding degree, and improved hopper folding speed, improved the working efficiency of paver.And, can simplify the oil circuit design of paver because hydraulic jack single-acting control only relates to an external oil circuit, be convenient to fitting operation.
Be the preferred embodiments of the present invention only below, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. single-acting hydraulic jack comprises: cylinder body, be arranged on piston and the piston rod that described piston is connected in the described cylinder body, it is characterized in that, offer the rod chamber of the described cylinder body of connection and the throttle orifice of rodless cavity on the described piston.
2. single-acting hydraulic jack according to claim 1 is characterized in that, described single-acting hydraulic jack is a multistage hydraulic cylinder, is equipped with described throttle orifice on the pistons at different levels of described multistage hydraulic cylinder.
3. single-acting hydraulic jack according to claim 2 is characterized in that, described multistage hydraulic cylinder is the two-stage hydraulic jack, comprising:
The one-level hydraulic jack, it comprises:
The one-level cylinder body (5) of hollow, the first stage piston bar (12) that is arranged on that first stage piston (10) in the described one-level cylinder body (5) is connected with described first stage piston (10) and passes from described one-level cylinder body (5);
Described first stage piston (10) is provided with one-level throttle orifice (11), and the rodless cavity end of described one-level cylinder body is provided with hydraulic fluid port (3);
The 2-level hydraulic oil cylinder, it comprises:
The secondary cylinder body of hollow, described secondary cylinder body is formed by described first stage piston bar (12) and described first stage piston (10); Be arranged on the second piston (20) in the described secondary cylinder body; The second piston rod (22) that is connected with described second piston (20) and passes from the outer end of described first stage piston bar (12); Described second piston (20) is provided with two-step throttle hole (22).
4. single-acting hydraulic jack according to claim 3 is characterized in that, the casing wall of described secondary cylinder body is provided with the bounding means that is used for the described second piston of stop (20).
5. single-acting hydraulic jack according to claim 4 is characterized in that the casing wall of described secondary cylinder body is provided with first annular groove, and described bounding means (4) is for being mounted to the spacing snap ring of elasticity of described first annular groove.
6. single-acting hydraulic jack according to claim 5 is characterized in that,
Also be provided with second annular groove on the casing wall of described secondary cylinder body and be installed in the interior positioning ring (42) of described second annular groove;
Be folded with stiffening ring (40) between spacing snap ring of described elasticity (4) and the described positioning ring (42).
7. single-acting hydraulic jack according to claim 3 is characterized in that, described first stage piston (10) is an integral structure with described first stage piston bar (12); Described second piston (20) is spirally connected with described second piston rod (22).
8. single-acting hydraulic jack according to claim 1 is characterized in that, described throttle orifice is a plurality of, goes up evenly at described piston (10) and arranges.
9. single-acting hydraulic jack according to claim 3 is characterized in that,
The external diameter of described first stage piston (10) is D 1, and the external diameter of described first stage piston bar (12) is d1, the through hole that described one-level throttle orifice (11) is R1 for 1 radius of N;
The external diameter of described second piston (20) is D2, and the external diameter of described second piston rod (22) is d2, and described two-step throttle hole (21) is N2 the through hole that radius is R2;
Wherein, N1 and N2 are the integer greater than 0, and satisfy
10. a paver is characterized in that, comprises each described single-acting hydraulic jack in the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102792257A CN101949398A (en) | 2010-09-13 | 2010-09-13 | Single-action hydraulic oil cylinder and paver with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102792257A CN101949398A (en) | 2010-09-13 | 2010-09-13 | Single-action hydraulic oil cylinder and paver with same |
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| CN101949398A true CN101949398A (en) | 2011-01-19 |
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| CN2010102792257A Pending CN101949398A (en) | 2010-09-13 | 2010-09-13 | Single-action hydraulic oil cylinder and paver with same |
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Cited By (9)
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| CN102410278A (en) * | 2011-11-11 | 2012-04-11 | 三一重工股份有限公司 | Multistage single-action hydraulic cylinder and engineering machinery provided with same |
| CN104364444A (en) * | 2012-04-04 | 2015-02-18 | 艾米奇私人贸易有限公司 | Chock for paver support |
| WO2015035903A1 (en) * | 2013-09-10 | 2015-03-19 | 三一汽车制造有限公司 | Wobbler mechanism and concrete pumping device |
| CN104454757A (en) * | 2014-11-12 | 2015-03-25 | 三一重型装备有限公司 | Hydraulic cylinder and cylinder cover structure thereof |
| CN105366039A (en) * | 2014-08-07 | 2016-03-02 | 空中客车营运有限公司 | Landing gear drive system |
| CN108006006A (en) * | 2017-12-14 | 2018-05-08 | 西安宇星石油机械新技术开发有限公司 | A kind of hollow fluid cylinder of Operating Pressure |
| US10421535B2 (en) | 2013-09-18 | 2019-09-24 | Airbus Operations Limited | Drive system for aircraft landing gear |
| CN110345127A (en) * | 2019-07-12 | 2019-10-18 | 南通翔骜液压润滑设备有限公司 | Multistage hydraulic cylinder |
| CN108006006B (en) * | 2017-12-14 | 2024-04-26 | 西安宇星石油机械新技术开发有限公司 | Hollow hydraulic cylinder for operation under pressure |
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| CN102410278A (en) * | 2011-11-11 | 2012-04-11 | 三一重工股份有限公司 | Multistage single-action hydraulic cylinder and engineering machinery provided with same |
| CN104364444B (en) * | 2012-04-04 | 2016-12-28 | 艾米奇私人贸易有限公司 | Retainer for paver bearing |
| CN104364444A (en) * | 2012-04-04 | 2015-02-18 | 艾米奇私人贸易有限公司 | Chock for paver support |
| WO2015035903A1 (en) * | 2013-09-10 | 2015-03-19 | 三一汽车制造有限公司 | Wobbler mechanism and concrete pumping device |
| US10421535B2 (en) | 2013-09-18 | 2019-09-24 | Airbus Operations Limited | Drive system for aircraft landing gear |
| US10435141B2 (en) | 2013-09-18 | 2019-10-08 | Airbus Operations Limited | Drive system for aircraft landing gear |
| CN105366039A (en) * | 2014-08-07 | 2016-03-02 | 空中客车营运有限公司 | Landing gear drive system |
| US10329012B2 (en) | 2014-08-07 | 2019-06-25 | Airbus Operations Limited | Landing gear drive system |
| US11524771B2 (en) | 2014-08-07 | 2022-12-13 | Airbus Operations Limited | Landing gear drive system |
| CN104454757A (en) * | 2014-11-12 | 2015-03-25 | 三一重型装备有限公司 | Hydraulic cylinder and cylinder cover structure thereof |
| CN108006006A (en) * | 2017-12-14 | 2018-05-08 | 西安宇星石油机械新技术开发有限公司 | A kind of hollow fluid cylinder of Operating Pressure |
| CN108006006B (en) * | 2017-12-14 | 2024-04-26 | 西安宇星石油机械新技术开发有限公司 | Hollow hydraulic cylinder for operation under pressure |
| CN110345127A (en) * | 2019-07-12 | 2019-10-18 | 南通翔骜液压润滑设备有限公司 | Multistage hydraulic cylinder |
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Application publication date: 20110119 |