CN2793449Y

CN2793449Y - Improved piston structure of air and oil pressure cylinder

Info

Publication number: CN2793449Y
Application number: CN 200520005449
Authority: CN
Inventors: 苏人杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-03-01
Filing date: 2005-03-01
Publication date: 2006-07-05
Anticipated expiration: 2015-03-01

Abstract

The utility model relates to an improved structure of a piston of an air and oil pressure cylinder, which mainly comprises a piston rod, a convex ring, a piston ring, a positioning sheet, etc., wherein the front end of the piston rod is provided with a combined part of which the rod diameter is small, and the convex ring, the piston ring and the positioning sheet can be assembled at the combined part orderly; the front end of the combined part can make the convex ring, the piston ring and the positioning sheet fixed on the front end of the piston ring in a riveting mode, and the end surface of the convex ring is provided with a plurality of through holes; the piston ring is a circular ring body, and a gap is arranged on the piston ring. Thereby, the piston structure can be arranged in an oil pressure pipe where gas and oil liquid are injected in advance to make reciprocating movement.

Description

The piston improvement structure of gas, oil hydraulic cylinder

Technical field

The utility model is the piston improvement structure of a kind of gas, oil hydraulic cylinder, and this gas, oil hydraulic cylinder have two-way different resistance, have effect laborsaving and buffering concurrently and can provide; Especially, its piston ring of the piston structure of the utility model indication have splendid serviceability and piston rod can deflection, avoid lateral force to produce.

Background technique

Gas, oil hydraulic cylinder are to use assembly quite widely for each industry, and machinery, building, steam turbine car, bicycle, the full equipment of motion or other articles for daily use etc. all have and see its extensive use such as.This gas, oil hydraulic cylinder not only have the power conveying function, and when cylinder interior is preset with gas pressure, more can reach the using effect of pressure accumulation; Normal generally see, have article such as damper screen door about this kind gas, oil hydraulic cylinder structural design, make to be employed thing and can to have two-way different resistance, reach and be employed thing and have effect laborsaving and buffering concurrently just like the automobile rear cargo door.Please consult Fig. 1, shown in Figure 2 simultaneously, the basic comprising of aforementioned gas, oil hydraulic cylinder mainly comprises members such as oil pressure pipe 10 and piston set 20; Wherein, this piston set 20 is assembled locating washer 22, piston ring 23 and piston seat 24 in regular turn in a piston rod 21 front ends, and in the riveted mode locating washer 22, piston ring 23 and piston seat 24 is fixed in piston rod 21 front ends; Therefore, when piston rod 21 is movable in the oil pressure pipe 10 that is marked with gas and fluid in advance, can produce different resistances owing to moving or move down on the piston set 20, and then reach effect laborsaving and buffering, for example (see also Fig. 2), when moving on the piston set 20, gas in the oil pressure pipe 10 or fluid can be by the spacing circulations of 24 of oil pressure pipe 10 allusion quotation piston seats, through the breach of locating washer 22 and channelling is to piston set 20 belows smoothly, resistance is less when moving on this piston set 20, and is then comparatively laborsaving in the use; (otherwise seeing also Fig. 3), when piston set 20 moved down, gas or fluid in the oil pressure pipe 10 only can be escaped to piston set 20 tops by the minor groove that the wall of piston seat 24 is offered, resistance was bigger when this piston set 20 moved down, in the use then than the tool cushioning effect., the gas that aforementioned industry is more often used, oil hydraulic cylinder piston structure though the effect of piston set 20 reciprocal different resistances is provided, are so found after the practical operation test, known piston structure has following disappearance to remain to be improved:

(1) because in the known piston structure, this piston ring 23 has the effect of closed piston group 20 both sides oil, gas, but this effect is to fit tightly in the tube wall of oil pressure pipe 10 and can reach by piston ring 23, so the size of piston ring 23 must be slightly larger than oil pressure pipe 10 internal diameters, after piston ring 23 long-term uses, will cause the situation of abrasion or compressive deformation, therefore, this piston ring 23 can not cause seal good and cause the clear problem of Expected Results.

(2) for making oil, gas can pass through piston set 20 smoothly, the external side brim of this locating washer 22 and piston seat 24 needs to leave spacing with the tube wall of oil pressure pipe 10, therefore, the front end of piston rod 21 only depends on piston ring 23 to support, this piston ring 23 is again the lower colloid goods of hardness, therefore, when piston set 20 row to-and-fro motion, piston rod 21 does not easily cause lateral force to increase because of front end has firm support, when being protruded out, piston rod 21 can take place the beat problem, the generation of lateral force more can cause piston ring 23 abnormal wearing and tearing, even has the disappearance of gas leakage, oil to take place.

(3) when gas, the aforementioned disappearance of oil hydraulic cylinder generation, the motion of its piston rod 21 will produce the phenomenon that has some setbacks, so be employed thing, even this gas that has some setbacks, oil hydraulic cylinder will produce the application of force and can't on average cause being employed the disappearance that thing can't use if when needing to assemble simultaneously with a plurality of gas, oil hydraulic cylinder.

The model utility content

The purpose of this case creation promptly is to improve the disadvantages of aforementioned known piston structure institute tool, and the piston structure of a kind of gas, oil hydraulic cylinder is provided then, the piston structure that the durable in use and piston rod of its piston ring can deflection, avoid lateral force to produce.

For making audit crew can further understand technological means and the structure characteristics thereof of the utility model, sincerely enumerate following preferable feasible embodiment now, and the conjunction with figs. formula is described in detail as follows again for realizing that purpose is used:

Please consult Fig. 4 simultaneously, shown in Figure 5, piston structure of the present utility model mainly comprises members such as a piston rod 30, convex ring 40, piston ring 50 and location piece 60; Wherein

These piston rod 30 front ends are established less connecting part 31, bar footpath, convex ring 40, piston ring 50 and location piece 60 then can be assembled in this connecting part 31 in regular turn, and connecting part 31 front ends also can the riveted mode be fixed in piston rod 30 front ends with convex ring 40, piston ring 50 and location piece 60; The end face of this convex ring 40 is provided with the hole 41 of a plurality of perforations, when convex ring 40 and location piece 60 are fixed in piston rod 30 front ends, then forms holding area 42 between the two, and this piston ring 50 can be arranged in this holding area 42 displacements; This piston ring 50 is a circular ring body, and is provided with a breach 51 thereon; By this, can insert activity in the oil pressure pipe 70 that is marked with gas and fluid in advance by the piston structure that piston rod 30, convex ring 40, piston ring 50 and location piece 60 are formed, only the external diameter of this convex ring 4d generally equals oil pressure pipe 70 internal diameters, piston ring 50 external diameters are greater than oil pressure pipe 70 internal diameters, and location piece 60 external diameters are then less than the internal diameter of oil pressure pipe 70.

Description of drawings

Fig. 1 is the three-dimensional exploded view of known piston structure.

Fig. 2 constructs and the rising schematic representation for analysing and observe of known piston structure.

Fig. 3 constructs and the decline schematic representation for analysing and observe of known piston structure.

Fig. 4 is D structure figure of the present utility model.

Fig. 5 is analyse and observe structure and a piston rod rising schematic representation of the present utility model.

Fig. 6 is analyse and observe structure and a piston rod decline schematic representation of the present utility model.

Fig. 7 is the I-I sectional view of Fig. 6.

The figure elements explanation

10 oil pressure pipes, 20 piston set

21 piston rods, 22 locating washers

23 piston rings, 24 piston seats

30 piston rods, 31 connecting parts

40 convex rings, 41 holes

42 holding areas

50 piston rings, 51 breach

60 location pieces

70 oil pressure pipes

Embodiment

By above-mentioned structure, in piston structure is inserted the oil pressure pipe 70 that is marked with gas and fluid in advance when movable,, and then reach effect laborsaving and buffering because that piston moves up and down direction is different and can produce different resistances.For example (see also Fig. 5), when moving on the piston rod 30, gas in the oil pressure pipe 70 or fluid can be by distance circulations between location piece 60 and the oil pressure pipe 70, through a plurality of holes 41 of convex ring 40 end faces and smoothly channelling is to oil pressure pipe 70 belows, resistance is less when moving on this piston rod 30, and is then comparatively laborsaving in the use; (otherwise seeing also Fig. 6), when piston rod 30 moves down, because location piece 60 is sealed by piston ring 50 with the spacing of oil pressure pipe 70, therefore gas or the fluid in the oil pressure pipe 70 only can be escaped to oil pressure pipe 70 tops by the breach 51 that piston ring 50 is only deposited, resistance was bigger when this piston rod 30 moved down, in the use then than the tool cushioning effect.

Be with, the piston structure of this case is except the effect that gas, the reciprocal different resistances of oil hydraulic cylinder can be provided, it has more following advantage:

(1) sees also Fig. 7, because piston ring 50 external diameters are greater than oil pressure pipe 70 internal diameters, and piston ring 50 is provided with a breach 51, therefore, in piston ring 50 is inserted oil pressure pipe 70, it can shrink in response to oil pressure pipe 70 internal diameters, make piston ring 50 outer rims and oil pressure pipe 70 inwalls keep a bullet to open pressure at any time, this bullet is opened pressure and is then come from elasticity after piston ring 50 is retracted itself, therefore, when piston ring 50 in oil pressure pipe 70 during to-and-fro motion, the resistance that is produced because of rubbing is less, therefore, even use this piston ring 50 also can not wear and tear (also filled vacancies in the proper order by the bullet amount of tension of piston ring 50 even produce wearing and tearing slightly, the oil sealing effect is unaffected) for a long time.

(2) because gas in the oil pressure pipe 70 or fluid can be by a plurality of holes 41 circulations of convex ring 40 end faces, so the design of convex ring 40 external diameters generally can be equaled oil pressure pipe 70 internal diameters, therefore, piston rod 30 front ends can support and deflection not by convex ring 40, when the capable to-and-fro motion of piston, piston rod 30 is scheduled to the centerline direction motion, avoids the enhancer of lateral force.

Address the preferred embodiment shown in the drawings as can be known from above institute, the utility model is by the design of members such as piston rod 30, convex ring 40, piston ring 50 and location piece 60, makes it have splendid serviceability and can avoid the piston rod deflection and cause lateral force to produce; Therefore, this case and known the comparison, really have obvious improvement and practicability, and the technological means of its utilization and base structure are are really researched and developed by designer of the present utility model to form, the utility model has met the important document of patent, likes to file an application in accordance with the law, and prays and grant patent right for praying.Only, the above disclosed structure of the utility model is to be the utility model preferred embodiment, and the equivalence of doing according to structure of the present utility model changes such as, must contain to be placed in the protection domain of the present utility model.

Claims

1. the piston of a gas, oil hydraulic cylinder improvement structure, this piston structure mainly comprises members such as piston rod, convex ring, piston ring and location piece; It is characterized in that:

This piston rod front end is established less connecting part, bar footpath, and convex ring, piston ring and location piece then can be assembled in this connecting part in regular turn, and the connecting part front end also can the riveted mode be fixed in the piston rod front end with convex ring, piston ring and location piece; The end face of this convex ring is provided with the hole of a plurality of perforations, and this piston ring is a circular ring body, and is provided with a breach thereon; By this, this piston structure can be inserted to-and-fro motion in the oil pressure pipe that is marked with gas and fluid in advance.

2. the piston improvement structure of gas as claimed in claim 1, oil hydraulic cylinder is characterized in that the external diameter of this convex ring generally equals the oil pressure pipe internal diameter.

3. the piston improvement structure of gas as claimed in claim 1, oil hydraulic cylinder is characterized in that this piston ring external diameter is greater than the oil pressure pipe internal diameter.

4. the piston improvement structure of gas as claimed in claim 1, oil hydraulic cylinder is characterized in that this location piece external diameter is less than the internal diameter of oil pressure pipe.