CN202690572U - Rotation prevention hydraulic cylinder structure - Google Patents
Rotation prevention hydraulic cylinder structure Download PDFInfo
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- CN202690572U CN202690572U CN 201220289638 CN201220289638U CN202690572U CN 202690572 U CN202690572 U CN 202690572U CN 201220289638 CN201220289638 CN 201220289638 CN 201220289638 U CN201220289638 U CN 201220289638U CN 202690572 U CN202690572 U CN 202690572U
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Abstract
The utility model discloses a rotation prevention hydraulic cylinder structure which comprises a piston and a piston rod, wherein the piston and the piston are arranged inside a sealed hydraulic cylinder main body, one end of the piston rod is connected with the piston, and the other end of the piston rod penetrates out of the hydraulic cylinder main body. Further more, one end of the piston rod is connected with a non-center portion of the piston, and the piston rod is parallel to the axis of the piston. According improvement of the structure of a hydraulic cylinder by the rotation prevention hydraulic cylinder structure, and especially the method of eccentric combination of the piston and the piston rod, and the problem that a traditional hydraulic cylinder piston rotates during a rising process is resolved without utilizing of schemes that the diameter of the hydraulic cylinder is increased and the like. Meanwhile, problems of technical risks, large increase of cost and the like are resolved, wherein the problems are caused by schemes that a guide bar is additionally arranged, the form of the piston rod is changed, a sleeve barrel type oil cylinder is utilized and the like. In addition, the rotation prevention hydraulic cylinder structure is simple in structure, convenient to operate, high in reliability and low in cost.
Description
Technical field
The utility model relates to a kind of lifting device of hydraulic pressure lift impaction testing table, and particularly a kind of anti-rotation hydraulic cylinder structure belongs to the dynamic environmental test technical field.
Background technique
Impaction testing table is a kind of dynamic environmental test equipment, be used for simulation by test specimen at the suffered single of transportation or using process or the shock environment of repetition, with examination by the reliability of test specimen function under this environment and the integrity of structure.
Consult Fig. 1, existing hydraulic pressure lift impaction testing table mainly is comprised of base plate 13, base 15, vibration damping equipment 14, waveform generator 16, guide pillar 19, table top 17, hydraulic lifting apparatus 20, break 18 etc.Wherein, hydraulic lifting apparatus mainly is comprised of hydraulic pressure cylinder assembly, pulley base 25, pulley 27, wire rope 22, davit 21 etc., pulley base is installed on the piston rod of oil hydraulic cylinder, pulley is fixed on the pulley base by bearing, can rotate around stationary axle, wire rope is walked around pulley, and an end is fixed on the base, one end is installed davit, as shown in Figure 2.
In hydraulic pressure lift impaction testing table working procedure, provide power source by hydraulic power, oil hydraulic cylinder is as executive component, by pulley, wire rope and davit the table top of impaction testing table is risen to setting height, make table top rest on this height by break, treat that the piston of oil hydraulic cylinder gets back to zero-bit, the releasing brake device, table top is under the self gravitation effect, glide along guide pillar, the waveform generator on the bump base produces waveform, be installed in sensor on the table top and gather waveform to data and be transferred in the TT﹠C system, finish the single test process.
Yet piston 3a and the piston rod of oil hydraulic cylinder all are cylindrical at present, piston rod and piston coaxial, and piston cooperates with the hydraulic cylinder inwall, and piston rod cooperates with guide holder 5a and guiding end cap 6a, as shown in Figure 3.In the process that promotes, piston and piston rod can be around self axis rotations, so that the pulley base that is installed on the piston rod produces swing in piston rod axis direction, cause wire rope and davit to swing, and because the length of wire rope is amplified pivot angle, the amplitude of fluctuation of davit is very large, knocks guide pillar and cylinder tube, affects the performance of test stand.
Three kinds of solutions are arranged at present: a kind of is to install a guide rod additional in the oil hydraulic cylinder outside, and this measure is comparatively commonly used.As shown in Figure 2, the piston rod guiding that the guide rod 23 that is installed at the oil hydraulic cylinder outside is oil hydraulic cylinder by two guide brackets being installed on pulley base and the hydraulic cylinder, guide rod one end is fixed on the guide bracket, the other end freely, piston in the course of the work, the guide rod fixed end moves with piston rod, and the other end slides in a guide bracket.Generally be not more than 100mm owing to being used for the cylinder diameter of oil hydraulic cylinder of impaction testing table lifting own, so the diameter of guide rod is usually less, the external orientation shank diameter is generally 10～20mm.This guiding measure structure is simple, easy for installation, with low cost, under a stable condition, can solve preferably the problem of hydraulic cylinder piston rod rotation, but the hydraulic cylinder travel that is used for the impaction testing table lifting is about 1000mm, in the situation that full stroke uses, the insufficient rigidity of guide rod self is to overcome the moment of torsion of hydraulic cylinder piston rotation generation, and pulley base, wire rope and davit still can swing.And for a long time work, the friction between guide rod and the guide holder also can affect the reliability of impaction testing table so that serious dust accumulation is arranged on the guidance set.So installing guide rod additional can not very satisfactory dealing with problems.And install the overall appearance that guide rod has a strong impact on impaction testing table additional at hydraulic cylinder.
The second solution is piston rod to be changed into square by circle, and the pilot hole of the end cap that also oil hydraulic cylinder led simultaneously changes into square, cooperates with piston rod.This mode also can effectively solve hydraulic cylinder piston Rotation in uphill process, but in the market Sealing all is circular, and the quad seal part needs customization, and sealing reliability also is not verified, and technology is very ripe.
The third is the anti-rotation oil cylinder of double-cylinder type, consults Fig. 4, and it comprises outer cylinder 30, inner casing 34, middle cylinder 31, key 29, rear end cover 32.Have back cylinder hydraulic fluid port 33 on the rear end cover and go out cylinder hydraulic fluid port 35, wherein returning the cylinder hydraulic fluid port communicates with the long oil hole that is provided with along the inner casing axial direction, the other end in this long oil hole communicates with the cylinder oil pocket that returns of middle cylinder, going out the cylinder hydraulic fluid port communicates with the cylinder oil pocket that goes out of middle cylinder, inner casing is fixedly connected with outer shell, the axial direction of middle cylinder outer surface has keyway, and key cooperates with keyway, can prevent the relatively inside and outside cylinder rotation of middle cylinder.In this structure, middle cylinder is a flanged (FLGD) hollow earthen pipe of an end, and the earthen pipe part is as piston rod, and flange part is as piston; Inner casing and outer cylinder are fixed, and the key on the middle cylinder and the keyway on the outer shell play directing effect, so that do not produce relative rotation between middle cylinder and outer shell and inner casing.In the situation that the same function area, the liquid cylinder entity diameter needs to increase, and just is enough to guarantee rigidity in order to orientation, but can causes so the significantly lifting of cost etc.
The model utility content
The purpose of this utility model is to propose a kind of anti-rotation hydraulic cylinder structure, it can prevent that effectively hydraulic cylinder piston from rotating with very little cost in uphill process, and the impaction testing table performance of lifting hydraulic cylinder driving, and improve hydraulically powered impaction testing table overall appearance, thereby overcome deficiency of the prior art.
For realizing above-mentioned model utility purpose, the utility model has adopted following technological scheme:
A kind of anti-rotation hydraulic cylinder structure, comprise the piston and the piston rod that place in the sealing fluid cylinder pressure main body, described piston rod one end is connected with piston, the other end passes from the oil hydraulic cylinder main body, further, described piston rod one end is connected with the non-central position of described piston, and the axis of piston rod and piston is parallel to each other.
As one of preferred scheme, described piston is provided with eccentric opening, and described piston rod one end is fixedly connected with piston through described eccentric opening, and the axis of piston rod and piston is parallel to each other
Described sealing fluid cylinder pressure main body comprises hydraulic cylinder, hydraulic cylinder base and the hydraulic cylinder end cover of coaxial setting, and described hydraulic cylinder two ends are tightly connected with hydraulic cylinder base and hydraulic cylinder end cover respectively.
Also be provided with piston rod guide in the described sealing fluid cylinder pressure main body, be fixedly connected with piston after described piston rod one end passes piston rod guide.
Particularly, described piston rod guide is provided with the pilot hole that can supply piston rod to pass freely through.
Described piston rod guide and hydraulic cylinder end cover are integrated the structure of setting.
A kind of hydraulic pressure lift impaction testing table, it comprises aforesaid anti-rotation hydraulic cylinder structure.
The Placement of the Placement of the Placement of described piston rod guide and hydraulic cylinder, hydraulic cylinder base and hydraulic cylinder, hydraulic cylinder end cover and hydraulic cylinder can be selected from and be spirally connected, weld or its combination.
Described piston rod guide cylindrical is coaxial with hydraulic cylinder, and the piston rod guide pilot hole is coaxial with piston rod.
Described hydraulic cylinder end cover cylindrical is coaxial with hydraulic cylinder, and the hydraulic cylinder end cover through hole is coaxial with piston rod.
The utility model is owing to the piston of oil hydraulic cylinder is fixedly connected with piston rod, and both are not on same axis, both are retrained by the other side at axial separately rotary freedom, it is the piston rod constraint that piston is fixedly connected with it at its axial rotary freedom, the piston constraint that piston rod is fixedly connected with it at its axial rotary freedom, thereby preventing that hydraulic cylinder piston from rotating in uphill process causes wire rope and davit to swing, effectively solve the defective that adds guide rod self insufficient rigidity, so that hydraulically powered impaction testing table is more stable in the course of the work, reliably, promoted simultaneously hydraulically powered impaction testing table overall appearance.
Therefore, compared with prior art, the utility model has the advantage of: improve by the structure to oil hydraulic cylinder, particularly adopt the method for the eccentric combination of piston and piston rod, need not to adopt schemes such as increasing the hydraulic cylinder diameter, can overcome the problem of rotating in the conventional cylinder piston uphill process, simultaneously, also can avoid adopting the problems such as the technical risk that causes as setting up guide rod, change the piston rod form and adopting the scheme such as double-cylinder type oil cylinder and cost significantly increase, and the utility model is simple in structure, easy to operate, reliability is high, and is with low cost.
Description of drawings
Fig. 1 is the structural representation of existing hydraulically actuated impact test stand;
Fig. 2 is the structural representation of existing hydraulically actuated impact test stand lifting device;
Fig. 3 is the structural representation of existing oil hydraulic cylinder;
Fig. 4 is the structural representation of double-cylinder type oil hydraulic cylinder;
Fig. 5 is the application state schematic diagram of the utility model one preferred embodiment;
Each assembly and reference character thereof are respectively among the figure: 1, hydraulic cylinder base; 2, hydraulic cylinder; 3, piston; 3a, piston; 4, piston rod; 5, piston rod guide; 5a, piston rod guide; 6, hydraulic cylinder end cover; 6a, hydraulic cylinder end cover; 13, impaction testing table base plate; 14, vibration damping equipment; 15, base; 16, waveform generator; 17, table top; 18, break; 19, guide pillar; 20, lifting device; 21, davit; 22, wire rope; 23, guide rod; 24, guide bracket one; 25, pulley base; 26, guide bracket two; 27, pulley; 28, stationary axle; 29, key; 30, outer cylinder; 31, middle cylinder; 32, rear end cover; 33, return the cylinder hydraulic fluid port; 34, inner casing; 35, go out the cylinder hydraulic fluid port; 36, hydraulic oil.
Embodiment
Below in conjunction with accompanying drawing and a preferred embodiment the technical solution of the utility model is described further.
Consult Fig. 5, the anti-rotation hydraulic cylinder structure of the present embodiment comprises the Sealing between a hydraulic cylinder base 1, hydraulic cylinder 2, piston 3, piston rod 4, hydraulic cylinder end cover 6 and each assembly.Described hydraulic cylinder base 1 is fixedly connected with hydraulic cylinder 2; Piston 3 closely cooperates with hydraulic cylinder 2 inwalls.Eccentric opening and piston rod 4 is set fixing on the piston 3, so that piston rod 4 and piston 3 be not on same axis.Piston rod guide 5 is fixedly connected with hydraulic cylinder 2; Through hole is set on the piston rod guide 5 cooperates with piston rod 4, hydraulic cylinder end cover 6 is fixedly connected with hydraulic cylinder 2; On the hydraulic cylinder end cover 6 through hole is set, allows piston rod 4 to pass through.Piston 3 cylindricals cooperate one group of guiding of formation with hydraulic cylinder 2 inner circles, can carry out straight line motion; Piston rod 4 cooperates with the pilot hole of piston rod guide 5 and forms another group guiding, because two groups of guiding are at same axis, both are retrained by the other side at axial separately rotary freedom, can only carry out straight line motion.
During the present embodiment hydraulic cylinder works, it is moving that piston 2 is subjected to the hydraulic oil driving axially to make straight line at it, in the movement process, its rotary freedom on self is axial is by the with it eccentric piston rod that is fixedly connected with 4 constraints, so that piston 3 and piston rod 4 keep directed in the course of the work.
So, can prevent that hydraulic cylinder piston from rotating in uphill process causes wire rope and davit to swing, effectively solve the defective that adds guide rod self insufficient rigidity, so that hydraulically powered impaction testing table is more stable, reliable in the course of the work, promoted simultaneously hydraulically powered impaction testing table overall appearance.
Need to prove, above only is the of the present utility model one preferred sample of implementing, and those skilled in the art are via the enlightenment of the utility model, also can expect all kinds of oriented structures that adopt related domain to commonly see, realizes with it close function.
Therefore, above preferred embodiment is only for illustration of the utility model, but not to restriction of the present utility model, person skilled in the relevant technique, in the situation that do not break away from spirit and scope of the present utility model, done various conversion or modification, all belong to category of the present utility model.
Claims (6)
1. anti-rotation hydraulic cylinder structure, comprise the piston (3) and the piston rod (4) that place in the sealing fluid cylinder pressure main body, described piston rod (4) one ends are connected with piston (3), the other end passes from the oil hydraulic cylinder main body, it is characterized in that, described piston rod (4) one ends are connected with the non-central position of described piston (3), and the axis of piston rod (4) and piston (3) is parallel to each other.
2. anti-rotation hydraulic cylinder structure according to claim 1 is characterized in that, described piston (3) is provided with eccentric opening, and described piston rod (4) one ends are fixedly connected with piston (3) through described eccentric opening.
3. anti-rotation hydraulic cylinder structure according to claim 1 and 2, it is characterized in that, described sealing fluid cylinder pressure main body comprises hydraulic cylinder (2), hydraulic cylinder base (1) and the hydraulic cylinder end cover (6) of coaxial setting, and described hydraulic cylinder (2) two ends are tightly connected with hydraulic cylinder base (1) and hydraulic cylinder end cover (6) respectively.
4. anti-rotation hydraulic cylinder structure according to claim 3 is characterized in that, the interior also coaxial piston rod guide (5) that is provided with of described sealing fluid cylinder pressure main body, and described piston rod guide (5) is provided with the pilot hole that can supply piston rod (4) to pass freely through.
5. anti-rotation hydraulic cylinder structure according to claim 4 is characterized in that, described piston rod guide (5) and hydraulic cylinder end cover (6) are integrated the structure of setting.
6. a hydraulic pressure lift impaction testing table is characterized in that, it comprises anti-rotation hydraulic cylinder structure as claimed in claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220289638 CN202690572U (en) | 2012-06-20 | 2012-06-20 | Rotation prevention hydraulic cylinder structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220289638 CN202690572U (en) | 2012-06-20 | 2012-06-20 | Rotation prevention hydraulic cylinder structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202690572U true CN202690572U (en) | 2013-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220289638 Expired - Lifetime CN202690572U (en) | 2012-06-20 | 2012-06-20 | Rotation prevention hydraulic cylinder structure |
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| CN (1) | CN202690572U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107740794A (en) * | 2016-01-06 | 2018-02-27 | 合肥龙精灵信息技术有限公司 | A kind of cylinder of cubic cylindricality piston rod |
| CN108026946A (en) * | 2015-09-21 | 2018-05-11 | 雄克有限公司 | Apparatus for fastening or self-winding parts with piston |
-
2012
- 2012-06-20 CN CN 201220289638 patent/CN202690572U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108026946A (en) * | 2015-09-21 | 2018-05-11 | 雄克有限公司 | Apparatus for fastening or self-winding parts with piston |
| CN107740794A (en) * | 2016-01-06 | 2018-02-27 | 合肥龙精灵信息技术有限公司 | A kind of cylinder of cubic cylindricality piston rod |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20130123 |
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| CX01 | Expiry of patent term |