DE7833144U1 - Gas spring filled with compressed gas - Google Patents

Description

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The invention is a gas spring filled with compressed gas in the form of a cylinder tube open on one side with a damping piston arranged at one end of a retractable and extendable piston rod and with the cylinder tube opening statically against the cylinder tube and dynamically against the xolbons tan / each sealing, fixed sealing devices.

Such gas springs are usually filled with compressed gas along the piston rod. The dynamic Seal is with one of the piston | provided the sealing lip facing the rod and acts |

as a check valve, which when filling |

of the compressed gas lifts off the piston rod |

I and closes the filled gas space as soon as |

the filling pressure is removed. |

Such a seal of the gas space is relative |

fire, there is also another static {P

Seal against the cylinder tube required. I.

She also has a certain space requirement, the I.

cannot be fallen below. When using |

of a one-piece seal is the filling In |

the described way very expensive, there. a | ^

such a seal against negative pressure as well as g

seals against overpressure. 'j |

The object of the present invention is to provide a gas spring that is economical Way can be filled, even with a one-piece seal a light fillable it guaranteed and has a previously permeable seal during operation.

I * ft · ■

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This problem is solved by the fact that the static Seal and the dynamic seal formed in the form of a one-piece sealing body are, the piston rod has a taper that can be brought into the area of the sealing body and the cylinder tube is provided with a bead delimiting the piston stroke.

A gas spring of this type can easily be placed between the piston rod via an annular gap and the seal body are filled, is easy and inexpensive to manufacture and is subject to no dimensional restriction with regard to the design of the sealing device.

The further embodiment of the invention provides that the one-piece sealing body is an O-ring is. To design the Vez-taper, it is provided that the taper in one of the piston adjacent area is arranged on the piston rod, or that the taper when retracted Piston rod in an area of the piston rod adjacent to the opening of the eyeliner tube is arranged. In the event that the taper is formed adjacent to the piston JLst, it is provided that the bead is in one Distance from the fixing bead of the sealing body is arranged, which is slightly larger than the axial length of the piston adjacent Rejuvenation. In the event that the taper of the cylinder tube opening is formed adjacent is, it is provided that the bead is at a distance from the bottom of the ZyIinderrohres is arranged, which is slightly larger than the Distance between the inner exit of the taper and the stop of the piston rod eye.

The Iirf indxxng is in the accompanying drawing and is described in more detail below. The figures show in detail:

Fig. 1 shows a gas spring with the piston adjacent tapering dor piston rod in working condition;

2 shows a gas spring with the cylinder tube opening adjacent taper in the filling position.

The gas spring 1 shown in FIG. 1 consists of a cylinder tube 6 which is open on one side and in which a piston 3 attached to a piston rod 2 is slidably disposed. One opening of the cylinder tube 6 is sealed off by an integral sealing body h. The sealing body k is held in its installation position in an axially immovable manner on the outside by a guide body 19 and on the inside by the positioning disk 18. The guide body 19 also provides an axial guide for the retractable and extendable piston rod 2 and is held in place by an outer flange of the cylinder tube 6 At a distance 8 from the pixelation bead 9, a stop bead 7 is provided in the direction of the cylinder base 1O, which represents a stroke limitation for the extendable piston 3.

The piston '} ^ o L'adjacent the ifiiistange 2 is provided with a taper 5, in the axial extension is somewhat smaller than the above-described distance 8. As a result, the taper 5 with filled gas spring 1 is not in the area of the bichtungskörners h komi .ien.

In the embodiment of the invention shown in FIG. 2, the taper 13 is arranged adjacent to the opening of the cylinder tube 6 when the piston rod 2 is retracted. The stop spike 12 is arranged at a distance 11 from the ZyjLinder base 10. The distance 11 is somewhat larger than the distance 17 between the inner tapering outlet 1 k and the stop 15 dei; Piston rod eye 16, or between the inner tapering outlet 14 and the most retractable point of the piston rod This ensures that the piston rod with its taper 13 can no longer come into the area of the sealing body k after the pressurized gas has been filled. The piston 3, which is provided with a conventional throttle 22, strikes against the bead 7 or 12, which acts as a stroke limiter, in both embodiments. On the outside of the cylinder bottom 10, a further fixed eye 21 is visible, which is used for the preferably rotatable fastening of the gas spring 1.

In both embodiments, the taper 5 or 13 of the piston rod 2 is moved into the area of the sealing body h in order to fill in the compressed gas. This creates an annular gap 23 between the piston rod 2 and the sealing body h , as shown on the basis of the exemplary embodiment according to FIG. After filling is complete, the piston rod 2

moved out of the area of the sealing body k , and zv.'clt v? ird in the embodiment according to Fi ^. 1 retracted and in the embodiment according to Pig ·. 2 extended. The sealing body k now surrounds the piston rod 2 in a sealing manner. Then the stop bead 7 or 12 is worked into the cylinder tube 6 and the gas spring 1 is brought into its final, functional shape.

Item list for 11 ~> 2.k

1 Gasfeaer 2 Ko Ib ens tsuige 3 2Co Ib en You, healthy body 5 Taper on 2 Ό Cylinder roller 7th Attach a si eke 8th Distance 7-9 9 Fixing bead 10 Zy1ind erbο d en 11th Distance 10-12 12th Stop bead 13th Taper on 2nd 14th inner taper exit 15th Attached to 16 16 KoIb ens tangenauge 17th Distance 14-15 IS Position disc 19th Leadership s Ic ö r ρ e r 20th Flanging 21 fixed eye 22nd throttle 23 R. ring gap

Claims (1)

Stabilus GmbH, Koblenz-Neuendorf II 524 Schweinfurt, 22-9.1978. S chut zans priiclie 1.) Gas spring filled with compressed gas in the form of a one-sided open cyl ind err o hi · it with one, at one end one retractable and extendable piston rod arranged damper piston and with the cylinder tube opening statically sealing against the cylinder tube and dynamically against the piston rod, fixed sealing devices, characterized in that the static seal and the dynamic seal are designed in the form of a one-piece sealing body (h) , - the piston rod (2) having in the region of the sealing body (h) can be brought Ver rejuvenation _T (5.13) - Provide the cylinder tube (6) with a bead (7 »12) that limits the piston stroke is. 2.) Gas spring according to claim 1, characterized in that the one-piece sealing body {k) is an O-ring. 3.) Gas spring according to claim 1 and 2, characterized in that the taper (5) in a your '< Piston (3) adjacent area on the piston rod (2) is arranged. k.) Gas spring according to claim 1 and 2, characterized in that j that the taper (13) is called the retracted piston rod (2) adjacent in one of the opening of the cylinder tube (6) region of the Piston rod (2) is arranged. 5.) Gas spring according to claim 1 and 3 j characterized in that the bead (7) is arranged at a distance (S) from the Pixxercings bead (9} of the sealing body {h), which is slightly greater than the axial length of the dem Piston (3) adjacent
Taper (5). 6.) Gas spring according to claim 1 and k, characterized in that the bead (12) is arranged at a distance (ii) from the BoH3η (IO) of the cylinder tube (6) which is slightly greater than the distance (17)
»Wipe the inner outlet (14) of the taper (13) and the deflection (15J of the piston rod eye (1 6) ♦