CN202833414U

CN202833414U - Anti-drop double-acting telescopic sleeve hydraulic cylinder

Info

Publication number: CN202833414U
Application number: CN 201220536738
Authority: CN
Inventors: 袁春辉; 唐新; 王晶
Original assignee: HUBEI JIAHENG TECHNOLOGY Co Ltd
Current assignee: HUBEI JIAHENG TECHNOLOGY Co Ltd
Priority date: 2012-10-19
Filing date: 2012-10-19
Publication date: 2013-03-27
Anticipated expiration: 2022-10-19

Abstract

The utility model relates to an anti-drop double-acting telescopic sleeve hydraulic cylinder. The anti-drop double-acting telescopic sleeve hydraulic cylinder comprises a hydraulic cylinder with multi-stage cylinder barrels. A cylinder base is arranged under the hydraulic cylinder, wherein sealing rings, support rings and guiding rings are respectively arranged between each inner bore of a superior cylinder barrel and each piston of a subordinate cylinder barrel. A square limiting clamping key groove is arranged at the upper portion of a guiding ring. The guiding ring is placed at the front end of the subordinate cylinder barrel piston. The square limiting clamping key groove is provided with a square clamping key. The clamping key and subordinate cylinder barrel piston are of a split type structure. During the lifting process of the hydraulic cylinder, the square clamping key which is placed at the front portion of a subordinate cylinder barrel piston strikes on a last footstep of a superior cylinder barrel guiding portion under the pushing of strong pressure. The damage degree of the cylinder barrel caused by impact value is reduced, and thus the anti-drop double-acting telescopic sleeve hydraulic cylinder has an effect of anti-drop. A plurality of cylinder score due to the striking phenomenon are reduced. The actual service life of the hydraulic cylinder is prolonged. The safety factor is improved.

Description

A kind of double-action telscoping hydaulic cylinder of anticreep level

Technical field

The utility model relates to the oil hydraulic cylinder field, specifically a kind of double-action telscoping hydaulic cylinder of anticreep level.

Background technique

Dumping car is the limit-type overall structure oil cylinder of step with double-action telscoping hydaulic cylinder General Construction, because this kind structure is when lifting or decline, all there are high-pressure situations in cylinder barrel epicoele and cavity of resorption, and the piston step that changes secondary cylinder barrel in grade process in lifting will be directly and the collision of the guiding step of higher level's cylinder barrel, produce impacting with high pressure, under the impacting with high pressure, place, step right angle can produce burr frequently; Producer or user tend to the system pressure of control oil hydraulic cylinder lifting force is heightened for Duola's goods, when pressure can bear the limit above cylinder barrel, can produce the cylinder phenomenon that rises, it is large that cylinder barrel guide and limit inner bore of step position also can become thereupon, in unbalance loading situation and the excessive situation of lift-off pressures, the next stage cylinder barrel can be extracted from upper level cylinder barrel guiding, produces and takes off a grade phenomenon, when causing dumper unloading land suddenly in large railway carriage or compartment, and the major accident of car crash occurs.

Summary of the invention

The utility model is extracted from upper level cylinder barrel guiding in order to prevent the next stage cylinder barrel, produces and takes off a grade phenomenon, guarantees the safety of vehicle, and a kind of double-action telscoping hydaulic cylinder of anticreep level is provided.

For this, the technical solution of the utility model is as follows: a kind of double-action telscoping hydaulic cylinder of anticreep level, the oil hydraulic cylinder that comprises multistage cylinder barrel, oil hydraulic cylinder has the cylinder seat, wherein be provided with between each higher level's inner hole of cylinder and the subordinate's piston cylinder and be respectively equipped with seal ring, support ring, guide ring, it is characterized in that: be to be provided with a limiting card keyway on the top of subordinate's piston cylinder front end guide ring, be provided with card key in the limiting card keyway, card key and subordinate's piston cylinder are split-type structural.

Improvement to such scheme is: described limiting card keyway and card key are square.

Beneficial effect:

The utility model adopts the limit-type Split type structure of card key, processing comparatively is simple and easy to realize, the spacing card key of subordinate's piston cylinder front end cylindrical and higher level's cylinder barrel guiding endoporus lower end step collides in changing grade process, because the effect of card key, both guaranteed performance requirements improve again piston cylinder position bulk strength.

In use utilize square card key and cylinder barrel guiding endoporus step to clash into, both made be oil cylinder produce under strong pressure strong impingement phenomenon or in the situation that car body release produce in the situation that local pressure changes, the variable quantity of square card key can not produce excessive variation yet, can effectively stop because of raw-material yield strength, elasticity change Overpressure of a safety valve and be the cylinder body that is worth and causes and take off a grade phenomenon, thereby reach anticreep level purpose.

Description of drawings

Fig. 1 is structural representation of the present utility model.

The 1st, the cylinder seat, the 2nd, outer cylinder, the 3rd, the one-level cylinder barrel, the 4th, card key, the 5th, the secondary cylinder barrel, 6 is three grades of cylinder barrels, the 7th, seal ring, the 8th, support ring, the 9th, guide ring, the 10th, limiting card keyway.

Embodiment

The utility model as shown in Figure 1.

A kind of double-action telscoping hydaulic cylinder of anticreep level, the oil hydraulic cylinder that comprises multistage cylinder barrel, oil hydraulic cylinder has cylinder seat 1, wherein be provided with between each higher level's inner hole of cylinder and the subordinate's piston cylinder and be respectively equipped with seal ring 7, support ring 8, guide ring 9, specifically be provided with in the one-level cylinder barrel 3 in the outer cylinder 1, be provided with secondary cylinder barrel 5 in the one-level cylinder barrel 3, to be provided with a limiting card keyway 10 on the top of the piston cylinder front end guide ring of one-level cylinder barrel 3 and secondary cylinder barrel 5, be provided with card key 4 in the limiting card keyway 10, card key 4 is split-type structural with subordinate's piston cylinder.

Limiting card keyway 10 and card key 4 are square.

Claims

1. the double-action telscoping hydaulic cylinder of an anticreep level, the oil hydraulic cylinder that comprises multistage cylinder barrel, oil hydraulic cylinder has the cylinder seat, wherein be provided with between each higher level's inner hole of cylinder and the subordinate's piston cylinder and be respectively equipped with seal ring, support ring, guide ring, it is characterized in that: be to be provided with a limiting card keyway on the top of subordinate's piston cylinder front end guide ring, be provided with card key in the limiting card keyway, card key and subordinate's piston cylinder are split-type structural.

2. the double-action telscoping hydaulic cylinder of a kind of anticreep level according to claim 1, it is characterized in that: described limiting card keyway and card key are square.