ES2399729A1 - Radial shaft sealing ring has supporting body, where sealing lip is arranged, and form-fit elements are formed as cam, which protrudes in radial direction or in axial direction - Google Patents

Abstract

The radial shaft sealing ring (1) has a supporting body, where a sealing lip is arranged. The supporting body has a radially inboard inner side (8), and is assigned with interlocking elements. The interlocking elements are held by a joining tool in a form fit manner. The form-fit elements are formed as a cam (9) which protrudes in a radial direction or in an axial direction. An independent claim is also included for a method for mounting a radial shaft sealing ring.

Description

Radial sealing ring with positive shaped connection elements.

Technical field

The invention relates to a radial sealing ring according to the preamble of claim 1.

State of the art

Radial sealing rings are normally pressed into a housing. This is done by displaying a force or travel limit. Therefore, problems may occur depending on the lubrication and / or realization of the housing. Elastic recoveries, incorrect positions can occur or in the most unfavorable case a cut of the elastomer of the radial sealing ring can occur.

From DE 10 2008 030 174 A1, an assembly tool is known that grips a radial sealing ring, rotates it and is thus pressed into a housing. The assembly tool grips the radial sealing ring on the face of the base, the positively connecting elements being applied on the side of the assembly tool to the positively connecting positively complementary elements of the radial sealing ring. In this way, a transmission with positive connection in the form of forces in the contour direction is possible. The radial sealing ring can be inserted into the housing by turning.

From DE 10 2008 030 174 A1 it is known in particular to place a profile formed by extensions and depressions on the face of the base of the radial sealing ring. The manufacture of this profile is complicated and due to its structure of filigree-type sheets it allows only little clearance for the custom-made implementation of the complementary assembly tool.

Representation of the invention

The invention proposes the object of indicating a radial sealing ring which, after a simple manufacture, can without problems be pressed into a housing.

The present invention carries out the object mentioned above by the features of claim 1.

According to the invention, the mounting of the radial sealing ring is improved by the superposition of an advance and a turning movement. For this, according to the invention, projections are placed in the radial sealing ring. The projections can be connected positively to an assembly tool, so that the radial sealing ring can be introduced into the perforation of a housing by a rotational movement with advance. Advantageously there are no elastic recoveries, incorrect positions or cuts of the elastomer of the radial sealing ring. The arc-shaped projections can be manufactured without problems and according to the invention are ordinary pieces and made very stable. These can be grabbed smoothly with a positive joint by an assembly tool and driven hard. Small manufacturing tolerances thus become almost imperceptible.

Therefore, the object mentioned at the beginning is achieved.

The projections could be fixed on the inner face and protrude radially into the interior. With this, the projections can be grasped without problems by an axially inserted assembly tool and propelled with great force in the contour direction.

The projections could protrude in an axial direction by a radial arm of the support body by the face of the base of the radial sealing ring furthest from the sealing lip. For this, the radial sealing ring can be inserted into a housing with the front face in front.

The projections could be formed by an elastomer coating or be placed in the coating. Thus, the projections are attached to the radial sealing ring sufficiently solidly.

The projections could be made in an arc and be spaced apart by gaps in the contour direction. By this concrete embodiment, an assembly tool can grip the protrusions with positive shape junction. In particular, the projections can be grasped without problems by an axially inserted assembly tool and driven with great force in the contour direction. The arc-shaped embodiment stabilizes the protrusions.

There are different possibilities of realizing and perfecting the theory of the present invention. For this, reference is made on the one hand to the subordinate claims and on the other hand to the following explanation of preferred embodiments of the invention by virtue of the drawing.

In connection with the explanation of the preferred embodiments of the invention by virtue of the drawing, preferred embodiments and refinements of the theory are also generally explained.

Brief description of the drawing

In the drawing they show:

Fig. 1, a perspective view of a radial sealing ring with projections projecting inward in radial direction,

Fig. 2, a sectional view of the radial sealing ring according to Fig. 1,

Fig. 3, a perspective view of the radial sealing ring with protrusions protruding in the radial direction, and

Fig. 4, a sectional view of the radial sealing ring according to Fig. 3.

Embodiment of the invention

Fig. 2 shows a radial sealing ring 1 with a spring loaded sealing lip 2 and a dust cap 3. The sealing lip 2 is compressed by an annular spring 4 against an axis not shown. The dust lip 3 faces a dust face 5, and the sealing lip 2 is associated with an oil face 6.

The dust lip 3 extends axially and fits with curvature to an axis. The dust lip 3 is curved outward, specifically in the direction of the dust face 5. The dust lip 3 is made on the face of the base B of the radial sealing ring 1.

The radial sealing ring 1 comprises a support body 7 on which the sealing lip 2 is arranged, the support body 7 having an inner face 8 that is positioned radially on the inside.

In the inner face 8 protrusions 9 are made in the form of an arc. The support body 7 is made in the shape of an L in cross section and has a radial arm 7a and an axial arm 7b.

The radial sealing ring 1 comprises a support body 7, in which a sealing lip 2 is provided, the support body 7 having an inner face 8 that is positioned radially on the inside and the support body 7 are associated with positive bonding so that they can be grabbed with positive bonding by an assembly tool. The positively shaped connecting elements are made as projections 9 projecting inwards radially. The projections 9 are fixed on the inner face 8 and project radially towards the inside thereof.

The protrusions 9 are formed by an elastomer coating 10. The projections 9 are made in the form of an arc and are spaced apart from each other by holes 11. This is shown in Fig. 1. Fig. 1 shows in particular that four projections 9 are provided which are arranged equidistant on the inner face 8.

The projections 9 are arranged on the front face S further away from the face of the base B of the support body 7. With this, the radial sealing ring can be pressed into a housing with the face of the base B in front.

Fig. 4 shows a radial sealing ring 1 with a spring loaded sealing lip 2 and a dust lip 3. The sealing lip 3 is compressed against an axis not shown by an annular spring 4. The dust lip 3 is associated with a dust cover 5, giving the sealing lip 2 to an oil face 6.

The dust lip 3 extends axially and fits with curvature to an axis. The dust lip 3 is curved outward, specifically in the direction of the dust face 5. The dust lip 3 is made on the face of the base B of the radial sealing ring 1.

The radial sealing ring 1 comprises a support body 7 on which the sealing lip 2 is arranged, the support body 7 having an inner face 8 that is radially inward.

On the face of the base B of the radial sealing ring 1 furthest from the sealing lip 2, projections 9 are made. The support body is made in an L-shaped cross-section and has a radial arm 7a and an axial arm 7b. In particular, four protrusions 9 protrude axially along the radial arm 7a.

The radial sealing ring 1 comprises a support body 7 on which a sealing lip 2 is arranged, the support body 7 having an inner face 8 that is positioned radially on the inside and the support body 7 are associated joining elements positive so that they can be grabbed positively by an assembly tool. The positively shaped connecting elements are made as projections 9 protruding in axial direction.

The projections 9 protrude axially along a radial arm 7a of the support body 7 along the face of the base B of the radial sealing ring 1 further away from the sealing lip 2.

The protrusions 9 are formed by an elastomer coating 10. The projections 9 are made in the form of an arc and are spaced apart by holes 11 in the contour direction. This is represented in Fig.

3. Fig. 3 shows in particular that four projections 9 are provided which are arranged equidistant on the face of

base B. Therefore, the radial sealing ring can be pressurized into a housing with the front face S 5 in front.

In Figures 1 to 4, the support body 7 is at least partially integrated in the elastomer liner 10. The lining 10 has on its outer contour surface a groove structure 12 which, when assembled, fits inside the housing.

With regard to other advantageous embodiments and refinements of the theory of the invention, reference is made on the one hand to the general part of the description and on the other hand to the appended claims.

Claims (5)

1. Radial sealing ring (1) comprising a support body (7), in which a sealing ring (2) is arranged, in which the support body (7) has an inner face (8) located radially on the inside and in which to the support body (7) positive union elements are associated so that they can be 5 seized with a positive connection by means of an assembly tool, characterized in that the positive connection elements are formed as projections (9) projecting radially inwards or axially. 2. Radial sealing ring according to claim 1, characterized in that the projections (9) are fixed on the inner face (8) and protrude radially inwards.

3. Radial sealing ring according to claim 1, characterized in that the projections (9) project in an axial direction by a radial arm (7a) of the support body (7) on the face of the base (B) of the radial sealing ring

(1) further from the sealing lip (2). 4. Radial sealing ring according to one of claims 1 to 3, characterized in that the projections (9) are formed by an elastomer lining (10).

5. Radial sealing ring according to one of claims 1 to 4, characterized in that the projections (9) are made in an arc and are spaced apart by gaps (11) in the contour direction.

6. Procedure for mounting a radial sealing ring (1) according to one of the preceding claims, comprising the steps of:

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positive joint of the radial sealing ring (1) with an assembly tool, and

20 -Rotation and / or displacement of the radial sealing ring (1) in a housing, the rotation movement being superimposed on a forward movement. . SPANISH OFFICE OF THE PATENTS AND BRAND Application no .: 201130816 SPAIN Date of submission of the application: 05.20.2011 Priority Date: REPORT ON THE STATE OF THE TECHNIQUE 51 Int. Cl.: F16J15 / 32 (2006.01) RELEVANT DOCUMENTS

Category

56 Documents cited Claims Affected

X

WO 2009156029 A1 (PROMESS GES. FÜR MONTAGE UND P.) 30.12.2009, summary; pages 13-15; claims 10-11; Figures 1.6-10. 1.3-6

P, X

JP 2010242814 A (NOK) 28.10.2010 & Summary retrieved from EPODOC database, summary; paragraphs 22-23; Figures 1-3. 1.3-6

X

EP 1557596 A1 (CARL FREUDENBERG) 27.07.2005, summary; figures 1-2. 1.3-5

X

US 3110095 A (V. L. PEICKII) 12.11.1963, Figures 6-7,10,17-18. 1.3-5

TO

EP 1933068 A2 (SKF USA) 18.06.2008, paragraphs 46-48; Figures 7-8. 1,2,5

TO

US 20060249915 A1 (C. MADIGAN) 09.11.2006, summary; Figures 1-4. 1,2,5

TO

FR 1106870 A (F. LAFFONTAN) 23.12.1955, page 1, right column, line 36 - page 2, left column, line 13; figures. 1,2,5

Category of the documents cited X: of particular relevance Y: of particular relevance combined with other / s of the same category A: reflects the state of the art O: refers to unwritten disclosure P: published between the priority date and the date of priority submission of the application E: previous document, but published after the date of submission of the application

This report has been prepared • for all claims • for claims no:

Date of realization of the report 21.12.2012

Examiner S. Gómez Fernández Page 1/4

REPORT OF THE STATE OF THE TECHNIQUE Application number: 201130816 Minimum documentation sought (classification system followed by classification symbols) F16J Electronic databases consulted during the search (name of the database and, if possible, terms of search used) INVENES, EPODOC State of the Art Report Page 2/4  WRITTEN OPINION Application number: 201130816 Date of Written Opinion: 21.12.2012 Statement

Novelty (Art. 6.1 LP 11/1986)

Claims Claims 2 1, 3-6 IF NOT

Inventive activity (Art. 8.1 LP11 / 1986)

Claims Claims 2 1, 3-6 IF NOT

The application is considered to comply with the industrial application requirement. This requirement was evaluated during the formal and technical examination phase of the application (Article 31.2 Law 11/1986).  Opinion Base.- This opinion has been made on the basis of the patent application as published. State of the Art Report Page 3/4  WRITTEN OPINION Application number: 201130816  1. Documents considered.- The documents belonging to the state of the art taken into consideration for the realization of this opinion are listed below.

Document

Publication or Identification Number publication date

D1

WO 2009156029 A1 (PROMESS GES. FÜR MONTAGE ...) 12-30-2009

D2

EP 1557596 A1 (CARL FREUDENBERG) 27.07.2005

D3

US 3110095 A (V. L. PEICKII) 12.11.1963

D4

EP 1933068 A2 (SKF USA) 06-18-2008

D5

US 20060249915 A1 (C. MADIGAN) 09.11.2006

D6

FR 1106870 A (F. LAFFONTAN) 23.12.1955

 2. Statement motivated according to articles 29.6 and 29.7 of the Regulations for the execution of Law 11/1986, of March 20, on Patents on novelty and inventive activity; quotes and explanations in support of this statement * Claim 1, independent D1 discloses [see figures 1, 2, 6 and 7] a sealing ring (or retainer) (1) comprising a support body (12): -in which a radial sealing ring (or lip) (17) is arranged -with an inner face located radially on the inside (see figure 2) - to which positively shaped connecting elements (30) that project axially [see figures 6 and 7] are associated and are suitable for coupling with complementary elements (38) of an assembly tool (4).  Thus, given that all the claimed technical characteristics appear to be anticipated by D1, it can be concluded that no novelty is appreciated (art. 6 LP) in this claim. Documents D2, D3 also seem to deprive this claim of novelty (art. 6 LP) since they also disclose seals of the same type, with axial projections (see in D2, figures 1 and 2, references 9 and 10; or see in D3: fig. 6-7, ref. 54; fig. 10-11, ref. 69; fig. 17-18, ref. 108) said axial projections being suitable for the claimed application (coupled with complementary projections of a tool of mounting). * Dependent claims 3rd to 5th Nor can new developments (art. 6 LP) be observed in these claims since their additional technical characteristics also appear to be anticipated by D1, D2 and / or D3:

-

Claims 3rd and 4th: see D1, D2 or D3 for the previously mentioned parts

-

Claim 5: see D1, figure 6; or D2, figure 2.

•

Claim 6, independent.

Nor is any novelty appreciated (art. 6 LP) since the claimed assembly procedure also seems to be anticipated by D1: see its claims 10 and 11.

•

Claim 2, dependent on the 1st

 On the contrary, the additional features of this claim specifying that said projections extend radially from the inner face of said inwardly supporting body have not been found in the state of the art, nor has anything been found that would induce the expert in the matter to reach these terms to solve the technical problem raised, so it can be said that this claim seems to be new and involve inventive activity in the sense of art. 6 and 8 LP, respectively.  D4, D5 or D6 disclose (see parts cited in the IET) radial retainers comprising elements with projections (534, 52, 4, respectively) that extend radially inwards, but said elements are not "fixed" to the inner face of said support body and, therefore, do not appear to be suitable for the claimed application. State of the Art Report Page 4/4