CN2623956Y

CN2623956Y - Sealing structure for tubular gas filled vibration damper

Info

Publication number: CN2623956Y
Application number: CN 03213394
Authority: CN
Inventors: 薛玉斌; 宫耀旺
Original assignee: Jinzhou Wonder Auto Suspension System Co ltd
Current assignee: Jinzhou Wonder Auto Suspension System Co ltd
Priority date: 2003-05-27
Filing date: 2003-05-27
Publication date: 2004-07-07
Anticipated expiration: 2013-05-27

Abstract

A sealing structure in a tube puffing bumper solves puffing difficulties of a tube puffing bumper. The bumper has an oil storage cylinder, a working cylinder and a guiding cover are arranged in the oil storage cylinder; a spring is arranged on the guiding cover and a piston bar is arranged in the guiding cover; the ends of the guiding cover and the oil storage cylinder are provided with an oil sealing stand. The bumper is featured in that: the oil sealing stand is provided with a framework oil seal with dual lips and dual springs; a shoulder on the framework oil seal has a raised circular airtight loop; a skirt section of the framework oil seal has a plurality of vertical concave grooves and a plurality of vertical raised arrises. The bumper is characterized in that: the framework oil seal is provided with a raised circular airtight loop, thus ensuring a reliable sealing; the vertical concave groove and raised arris are arranged in the skirt section of the framework oil seal, thus puffing operation is easier and more convenient; moreover, the tube puffing bumper structure is simplified, thus reducing manufacturing cost, improving assembling efficiency and suiting mass production.

Description

The seal structure of cartridge type gas-filled shock absorber

Technical field

The utility model relates to a kind of seal structure of cartridge type gas-filled shock absorber.

Background technique

Gas-filled shock absorber is the inert gas that charges into certain pressure in the oil storage cylinder of hydraulic shock absorber, is generally nitrogen, to improve the usability of vibration damper.Its effect is the compensation performance that improves vibration damper, reduces the natural frequency of vibration damper simultaneously, reduces noise, improves the travelling comfort of vehicle ride.Charge into the technology more complicated of high-pressure gas to vibration damper inside, mainly contain two kinds of methods at present, a kind ofly inflate, another kind ofly seal for inflating afterwards earlier for sealing afterwards earlier.Method commonly used in the prior art is to seal afterwards earlier inflate, and the advantage of this inflation method is, charger is fairly simple, but the structure at oscillating damper inflation position is very complicated usually, the very difficult realization of general structure.The seal structure of vibration damper has many kinds of forms, common is threaded, rolling beading connects, the seam weldering connects or the like.Fig. 5 is the seal structure of a kind of common telescopic shock absorber in the prior art, belongs to the rolling beading mode and connects.It mainly is made up of piston rod, oil sealing base, oil sealing, spring, guide sleeve, oil storage cylinder and clutch release slave cylinder etc.It adopts full glue oil sealing, also have and adopt outside framework oil seal, but no matter be full glue oil sealing or outside framework oil seal, oil sealing in its structure all is fixed fully, the form that compresses is not that end face compresses is exactly that the circumferencial direction interference is pressed into ear end face and compresses, it is very difficult that this structure wants to charge into gas from the oil sealing position to vibration damper inside, can only be from other position inflations, but from other position inflations, bring foreign matter when sealing again easily into, influence the performance of vibration damper, and, complex structure, the cost of production of increase vibration damper.

The model utility content

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, solves the problem of cartridge type gas-filled shock absorber inflation difficulty, and a kind of seal structure easy, reliable sealing cartridge type gas-filled shock absorber of inflating is provided.

The utility model has an oil storage cylinder, clutch release slave cylinder and guide sleeve are housed in oil storage cylinder, spring is housed on guide sleeve, piston rod is housed in guide sleeve, oil sealing base is equipped with in end at guide sleeve and oil storage cylinder, its special way is, the outside framework oil seal of lips mouth dual spring is housed in oil sealing base, there is an O-ring seal that raises up at shoulder position on outside framework oil seal, this O-ring seal contacts with oil sealing base, seals, and several vertical grooves or several vertical fins are arranged in the skirt section of outside framework oil seal, on the excircle of outside framework oil seal, form several and charge into the passage of pressurized gas, so that in vibration damper, charge into pressurized gas.

Advantage of the present utility model is, adopts lips mouth dual spring outside framework oil seal, and the O-ring seal that setting raises up on outside framework oil seal has guaranteed that the cartridge type gas-filled shock absorber in use seals reliably; And vertical groove or fin are set in the skirt section of outside framework oil seal, thereby on the excircle of outside framework oil seal, formed several and charged into the passage of pressurized gas, pressurized gas charging into passage and can charge in the vibration damper on the outside framework oil seal excircle, make charge operation easier, more convenient, and, simplified the structure of cartridge type gas-filled shock absorber, reduced cost of production, improved packaging efficiency, its every technical order all is better than common hydraulic shock absorber, is suitable for large-scale mass production.

Description of drawings

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

Fig. 2 is the structural representation of the utility model outside framework oil seal;

Fig. 3 is the plan view of Fig. 2;

Fig. 4 is the another kind of structural representation of the utility model outside framework oil seal;

Fig. 5 is the seal structure schematic representation of telescopic shock absorber in the prior art.

Embodiment

As Fig. 1, Fig. 2 and shown in Figure 3, the utility model has an oil storage cylinder 7, clutch release slave cylinder 8 and guide sleeve 6 are housed in oil storage cylinder 7, spring 4 is housed on guide sleeve 6, piston rod 1 is housed in guide sleeve 6, oil sealing base 3 is equipped with in end at guide sleeve 6 and oil storage cylinder 7, between guide sleeve 6, oil storage cylinder 7 and oil sealing base 3 seal ring 5 is housed, and seal ring 5 is guaranteed not leak between oil storage cylinder 7 and the oil sealing base 3; The outside framework oil seal 2 of lips mouth dual spring is housed in oil sealing base 3, there is an O-ring seal that raises up at shoulder position on outside framework oil seal 2, this O-ring seal contacts with the internal surface of oil sealing base 3, seals, and guarantees that the place suitable for reading of oil sealing base 3 does not leak; Skirt section at outside framework oil seal 2---be on the excircle of outside framework oil seal 4 vertical grooves 9 to be arranged, the cross section of groove 9 is semicircle, it also can be trapezoidal or rectangle, the quantity of groove 9 also is not limited to 4, can increase and decrease according to actual needs, the skirt section of outside framework oil seal 2 contacts with the internal surface of oil sealing base 3, play the effect of location, 9 of grooves make outside framework oil seal 2 upper and lower communicating, thereby on the excircle of outside framework oil seal 2, form several and charge into the passage of pressurized gas, so that in vibration damper, charge into pressurized gas; Also can there be several vertical fins 10 in skirt section at outside framework oil seal 2, as shown in Figure 4, fin 10 contacts with the internal surface of oil sealing base 3, play the effect of location, the part that falls between the fin 10 then makes outside framework oil seal 2 upper and lower communicating, form the passage that several charge into pressurized gas, be used to charge into pressurized gas; In outside framework oil seal 2, also have a Steel Support,, prevent distortion to improve the intensity of outside framework oil seal 2.

During assembling, guide sleeve 6 is installed on clutch release slave cylinder 8 earlier, then, seal ring 5 is placed on the guide sleeve 6, puts into spring 4 again, in oil sealing base 3, be coated with a little oiling agent, outside framework oil seal 2 is put into oil sealing base 3, again with oil sealing base 3 together with outside framework oil seal 2 oil storage cylinder 7 of packing into, push down oil sealing base 3 rolling of special use on the envelope closing in equipment and carry out rolling beading, finish whole seal structure; Then, charge into pressurized gas through the center hole a of oil sealing base 3 to vibration damper inside with special-purpose inflation anchor clamps, during inflation, outside framework oil seal 2 overcomes the resistance of spring 4 under the effect of pressurized gas, moves down along the bore area of oil sealing base 3, and the distance that moves is very little; At this moment, the O-ring seal at outside framework oil seal 2 shoulder positions and oil sealing base 3 break away from, pressurized gas are crossed the O-ring seal at outside framework oil seal 2 shoulder positions, the vertical groove 9 or the recess on fin 10 next doors enter into vibration damper inside along outside framework oil seal 2 skirt sections, promptly enter into the interlayer between oil storage cylinder 7 and the clutch release slave cylinder 8, and accumulate in b place, interlayer top; When reaching pressure balance, automatically stop inflation, after closing inflation source, outside framework oil seal 2 moves up under the promotion of spring 4 and vibration damper internal high pressure gas, the O-ring seal at outside framework oil seal 2 shoulder positions is closely contacted with the internal surface of oil sealing base 3, realize selfsealings, and guarantee that sealing is reliable.

Claims

1, a kind of seal structure of cartridge type gas-filled shock absorber, it has an oil storage cylinder, clutch release slave cylinder and guide sleeve are housed in oil storage cylinder, spring is housed on guide sleeve, piston rod is housed in guide sleeve, oil sealing base is equipped with in end at guide sleeve and oil storage cylinder, it is characterized in that, the outside framework oil seal of lips mouth dual spring is housed in oil sealing base, there is an O-ring seal that raises up at shoulder position on outside framework oil seal, and several vertical grooves or several vertical fins are arranged in the skirt section of outside framework oil seal.

2, the seal structure of cartridge type gas-filled shock absorber according to claim 1 is characterized in that, also has a Steel Support in outside framework oil seal.