DE102006015582A1 - Sleeve element has axial section, whose outer shell is provided in cavity of further part enclosing section basically for firm fit, section has slit in axial direction - Google Patents

Abstract

The element (10) has an axial section, whose outer shell is provided in a cavity of a further part enclosing the section basically for firm fit. The section has a slit in axial direction and the inner shell of the section is formed with the inner diameter which becomes small in the axial direction, so that the firm fit is produced by inserting of a ring shaped dispersion element in the enclosing region in the direction of the inner diameter from the inner shell.

Description

The The invention relates to a sleeve element.

In Many fields of engineering make the requirement a sleeve-like Element in a cavity, in particular with regard to a tensile or compressive load, in axial Direction firm and at the same time simple and inexpensive too assemble. There are special measures in particular then to seize when the cavity forming component, for example for the purpose of sealing, in cavity portion is formed of an elastomeric material.

A The object of the invention is therefore to provide a sleeve element with at least an axial section whose outer shell is in a section in essential enclosing cavity another component is provided for firm concern, so form, that even in training of the other component in the cavity portion made of an elastomeric material, the sleeve element at the same time simple and therefore less expensive training of the sleeve element is firmly installed in the cavity with respect to axial tensile or compressive forces.

The The object is solved by the subject matter of claim 1. advantageous Embodiments are described in the subclaims.

According to claim 1 includes a sleeve member with at least one axial section, whose outer jacket in a hollow a section substantially enclosing the further component is provided for solid concern, the section at least one Slit in the axial direction and the inner shell of the section is formed with axially decreasing inside diameter, so that by inserting a ring-like widening element in the area enclosed by the inner shell in the direction of the smaller expectant inside diameter causes the solid concern.

Thereby, the section comprises at least one slot in the axial direction and formed with decreasing in the axial direction of the inner diameter is by simply pushing in the ring-like widening element by a corresponding spreading of the section a tight fit of the sleeve member ensured in the further component. By slotting is further ensured with advantage that the portion of the sleeve member first easy and thus easy to install in the cavity of the other component hineinschiebbar is, as doing the section or at several slots the individual segments of the section yield inwardly flexing.

In According to an advantageous embodiment, the widening element is initially in one piece over Predetermined breaking points formed webs formed connected to the sleeve member. As a result, the widening element is, so to speak, with particular advantage already in the sleeve element voreingebracht. This eliminates advantageously pre-assembly Work steps, such as an introduction of a separate supplied widening element in the sleeve member. To attach the portion of the sleeve member in the cavity is then only the widening element in the direction of becoming smaller Inner diameter of the section to push it, while the predetermined breaking points break accordingly. Furthermore, this is the sleeve element together with the widening element in one piece and thus captive deliverable.

In an advantageous embodiment, the sleeve member, in particular coherently with the widening element produced as a plastic injection molded part. As a result, a particularly simple and therefore inexpensive manufacturability guaranteed.

In an advantageous embodiment is the portion of the sleeve member with a stop for formed the widening element, so that advantageously too far Insertion of the expansion element is prevented.

Further Advantages, features and details of the invention will become apparent the embodiment of the invention described below the figures. Showing:

1 a longitudinal section through an upper part of a radial shaft seal and a sleeve member connected to a trained as fractures webs expansion element and

2 a longitudinal section through an upper part of the sleeve member of 1 after a severing of the predetermined breaking points and an insertion of the widening element.

The 1 shows as an embodiment of the invention a longitudinal section through an upper part of a radial shaft seal 30 and a sleeve member 10 with a widening element 20 , wherein with respect to the radial shaft seal 30 only its sectional area is shown. The radial shaft seal 30 includes an elastomer part 31 and a stiffening part 36 , In this case forms the elastomer part 31 at least one intended for sealing engagement with a shaft sealing lip 33 out, wherein for pressing the sealing lip 33 to the shaft of the radial shaft seal 30 also a spring washer 38 is formed comprehensively. The radial shaft seal 30 is for example in one corresponding circular cylindrical opening of a shaft housing arranged.

In the right end area is the radial shaft seal 30 for an introduction of a section 12 of the sleeve element 10 intended. In this area is the radial shaft seal 30 formed on the inner surface of said region also made of elastomeric material, wherein in said region in the illustrated embodiment, a further elastomeric part 32 with a shaft-like profile 34 is trained. Here is the other elastomer part 32 opposite the first-mentioned elastomer part 31 is designed as a separate component. In another embodiment, the further elastomer part 32 and the former elastomer part 31 Of course, be formed in one piece.

The section 12 of the sleeve element 10 is at an axial end of the sleeve member 10 arranged and has an outer shell, which also has a wave-like profile in the axial direction 14 is formed, which suitably matches the wave-like profile 34 of the radial shaft seal 30 is. Continue the section 12 of the sleeve element 10 innenman telseitig formed such that the inner diameter decreases stepwise or paragraph-like manner to said axial end.

Furthermore, said section comprises 12 of the sleeve element 10 at least one slit extending in the axial direction, wherein in the illustration of 1 in the area of the slit, the sleeve element 10 is shown cut longitudinally. Next is in the right end of said section 12 a ring-like expansion element 20 over trained as predetermined breaking points webs 25 with the sleeve element 10 connected accordingly. In this case, the one-piece unit is made of sleeve element 10 and widening element 20 in particular designed as an injection molded part made of plastic.

After the radial shaft seal 30 is arranged in the shaft housing, the section 12 in the 1 illustrated sleeve element 10 accordingly in the designated area of the radial shaft seal 30 inserted. Through the slit is the insertion of the section 12 of the sleeve element 10 in the radial shaft seal 30 relieved, since, so to speak, the section 12 easily deform elastically on the inside. The insertion is terminated when the two matching wave-like profiles 14 and 34 completely interlock.

Then the section 12 of the sleeve element 10 in the radial shaft seal 30 characterized tensile strength fixed that now the widening element 20 , along with a breakage of the bars 25 , to the left in the direction of the decreasing inside diameter of the section 12 is pressed. This will be the section 12 of the sleeve element 10 facilitated by the slit spread and thereby a high-tensile connection between the sleeve member 10 and the radial shaft seal 30 achieved. Here is the section 12 of the sleeve element 10 an axial stop 18 for the widening element 20 designed so that with advantage the widening element 20 can not be pushed too far. The 2 shows to the sleeve element 10 and the widening element 20 after breaking the predetermined breaking points and a displacement of the widening element 20 all the way to the stop 18 ,

In the arrangement described above, it may be, for example, a part of in the EP 0 764 241 B1 act described hydraulic working cylinder.

10

sleeve member

12

section of the sleeve element

14

wavelike Profile of the sleeve element

18

attack for expansion element

20

Weitungselement

25

web

30

Radial shaft seal

31

elastomer part

32

additional elastomer part

33

sealing lip

34

wavelike Profile of the radial shaft seal

36

stiffener

38

spring washer

Claims (14)

sleeve member with at least one axial section, whose outer jacket in a hollow a section substantially enclosing the further component is provided for solid concern, the section at least a slit in the axial direction and the inner jacket of the Section with axially decreasing inside diameter is formed, so that by inserting a ring-like Expansion element in the area enclosed by the inner shell in Direction of decreasing inner diameter solid concern is effected. sleeve member according to claim 1, wherein the portion at an axial end of the sleeve member is arranged. sleeve member according to claim 2, wherein the inner sheath towards the axial end smaller is formed. sleeve member according to one of the claims 1 to 3, wherein the smaller are formed stepwise or stepped is. sleeve member according to one of the claims 1 to 4, wherein at the inner diameter smaller axial end of the section the portion forming an axial stop for the widening element is designed. sleeve member according to one of the claims 1 to 5, wherein the widening element initially formed integrally over as predetermined breaking points Webs with the sleeve element is formed connected. sleeve member according to claim 6, wherein the widening element in the interior of the sleeve member the Area with the decreasing inner diameter in the direction is arranged upstream of the Kleinerwerdens. sleeve member according to one of the claims 1 to 7, wherein the outer jacket the portion of the sleeve member and / or the cavity the further component in the axial direction with a wave-like Profile are formed. sleeve member according to claim 8, wherein the wave-like profile of the portion of the sleeve member and that of the cavity the further component are formed to match each other. sleeve member according to one of the claims 1 to 9, wherein the sleeve and / or expansion element by an injection molding are made. sleeve member according to one of the claims 1 to 10, wherein the sleeve and / or expansion element of a plastic are made. sleeve member according to one of the claims 1 to 11, wherein the further component is a radial shaft seal is and the outer jacket the portion of the sleeve member to concern with a cavity limiting inner surface a portion of the radial shaft seal is provided, wherein an outer surface of the Area for seating in a radial shaft seal receiving Installation environment is provided. sleeve member according to claim 12, wherein a said inner surface of the radial shaft sealing ring forming Part of the radial shaft seal against the remaining radial shaft seal is designed as a separate part. sleeve member according to one of claims 12 or 13, said inner surface of the radial shaft seal formed by an elastomeric material is.