Sealing assembly having a sealing unit

Abstract

The invention relates to a sealing assembly, which comprises a housing, a shaft (14) and a sealing unit. The sealing unit comprises a sealing ring (26), which has a retaining section (30) and a sealing lip (32), which extends outwardly away from the retaining section (30) in a radial direction relative to a central axis (34) of the sealing unit (24) and which rests in a dynamically sealed manner on a sealing surface (36) of a housing (12) of the sealing assembly. The sealing unit comprises an internally tensioned (28) tensioning ring, which is arranged to be embedded in the material of the sealing ring (26) and by which the axial positional fixation of the retaining section (30) in a retaining groove (40) and the circumferentially prestressed static sealing contact of the retaining section (30) on the shaft (14) are achieved.

Description

Technical Field

[0001] The invention relates to a sealing arrangement having a sealing unit. In many fields of application, sealing arrangements with simple sealing rings or simple sealing washers are used in practice, which usually have only an inadequate sealing effect. Such sealing arrangements are usually found in bicycles, electric bicycles (=E-Bikes), so-called electric assisted vehicles, electric tools, agricultural implements, but also in fittings for sanitary applications, food applications, refrigerators, steering devices and small transmissions, etc. Background Art

[0002] The sealing unit is arranged on the shaft and supported on the housing with its radially outer edge region. A sufficiently large dynamic sealing contact of the sealing unit against the relevant sealing surface of the housing is usually only possible here only to a certain extent. In addition, the static sealing arrangement of the sealing unit on the shaft is usually only rarely satisfactory. Therefore, contaminants, such as water or dirty particles, can also easily penetrate into the housing and cause negative effects on the function there and lead to increased wear of the bearing parts used to support the shaft. Summary of the invention

[0003] It is therefore an object of the present invention to specify a sealing arrangement having a sealing unit which has an improved sealing capability in a compact design and which can be assembled and disassembled as easily as possible.

[0004] The object of the invention is achieved by a sealing arrangement having the features specified in claim 1. Further developments of the invention are specified in the dependent claims and in the description.

[0005] The sealing assembly according to the present invention is particularly suitable for bicycles, electric bicycles, electric tools, agricultural implements, but also for accessories in sanitary applications, food applications, refrigerators, steering devices, small transmissions and the like. The sealing assembly comprises a housing and a shaft, which is rotatably supported in the housing around an axis of rotation. The sealing unit is used to seal the sealing gap formed between the housing and the shaft relative to the outer side of the sealing assembly, and the sealing unit has a sealing ring and a tensioning ring, which is arranged to be embedded in the elastically deformable material of the sealing ring at least in sections. The sealing ring and the tensioning ring thus constitute a structural unit or assembly unit that can be operated together. The sealing unit can be realized with a particularly compact structural depth. The sealing ring has a retaining section and a sealing lip, which extends outwardly away from the retaining section in a radial direction, and the sealing lip is dynamically sealed against the sealing surface of the housing in the axial direction relative to the axis of rotation. The axial position fixation of the retaining section of the sealing ring in the retaining groove of the shaft and the surrounding prestressing and static sealing of the retaining section on the shaft are achieved by the tensioning ring implemented internally in the radial direction. The sealing unit can thus be fixed to the shaft in a rotationally fixed manner. The sealing unit thus allows a reliable static and dynamic sealing of the sealing gap, thereby more reliably preventing water or contaminants from entering the sealing gap undesirably than in the case of the sealing unit described at the beginning. A higher level of protection can be achieved, for example, for high-pressure jet cleaning / steam jet cleaning. In short, the bearing part of the shaft, for example the inner bearing of the pedal crankshaft of a bicycle / electric power-assisted vehicle, can thus be reliably protected to avoid excessive wear, functional failures or even damage caused by dirt. Based on the tensioning ring integrated at least in sections into the sealing ring, the sealing unit can also be easily disassembled and replaced for maintenance work or when worn. By axially fixing the sealing ring in the retaining groove of the shaft, it can also be ensured that the sealing lip is pressed against the housing with sufficient contact and thus the effective dynamic sealing ability of the sealing unit is permanently ensured.

[0006] According to a preferred further embodiment of the present invention, the tensioning ring cooperates with the retaining groove at least in sections in the radial direction, thereby making it possible to fix the sealing ring or the entire sealing unit relative to the shaft, particularly reliably, in a predetermined axial position (with respect to the axis of rotation of the shaft) and relative to the acting torque.

[0007] According to a preferred embodiment of the invention, the tensioning ring is made of a polymer material. This achieves manufacturing advantages. In addition, undesired electrochemical corrosion in the area of ​​the housing can be prevented and a sealing unit with a particularly low mass can be provided. Alternatively, however, the tensioning ring can also be made of metal, which can ensure a particularly high retention and load-bearing capacity of the tensioning ring. In addition, when producing the sealing unit, standardized tensioning rings can be used, which achieves cost advantages.

[0008] According to the invention, the sealing unit or the clamping ring has a plurality of tool engagement portions or tool engagement recesses. The tool engagement portions are preferably accessible from the outside of the sealing unit with the aid of a tool (without causing damage). The tool engagement portions preferably allow widening of the clamping ring or the entire sealing unit and thus allow easy assembly or disassembly of the sealing unit.

[0009] According to one structural mode, the tool fitting portion can be implemented at least partially in the form of an (axial) through-recess of the tensioning ring. In this structural mode, the sealing ring preferably covers the tool fitting portion of the tensioning ring in an axial direction in a sealing manner on the outside. According to a preferred further embodiment of the present invention, the sealing ring can have one or more closing elements that can be releasably arranged on the rest of the sealing ring for this purpose. Each closing element can extend through one of the tool fitting portions accordingly and be arranged to be retained in the tool fitting portion in a press-fit and sealing manner. This makes it possible to achieve particularly reliable self-fixation of the corresponding closing element on the tensioning ring. It is understandable that each closing element of the closing element can also be fixed, for example fixedly bonded, to the rest of the sealing ring. Each closing element is preferably made of the same material as the rest of the sealing ring. Multiple closing elements or all closing elements can be implemented integrally with each other. This achieves manufacturing technical advantages and simplifies operation.

[0010] According to the invention, the tensioning ring can have more than two tool engagements. According to a particularly preferred further development of the invention, parts of the tool engagements of the tensioning ring are preferably arranged regularly spaced apart from one another and arranged one after the other in the circumferential direction of the tensioning ring. This allows a particularly variable action of the tool on the tensioning ring. This in turn further simplifies the assembly / disassembly of the sealing unit. At least part of the tool engagement can be matched in its shape and / or size to an engagement of a certain tool contour of a tool, in particular a screwdriver.

[0011] According to a particularly preferred further development of the invention, at least a portion of the tool engagement portion of the tensioning ring is designed as a blind hole. This dispenses with sealing of the tool engagement portion by the material of the sealing ring. This allows the sealing device to be realized particularly cost-effectively and with a compact structural depth. The tensioning ring does not require a sealing axial covering by the material of the sealing ring.

[0012] According to one embodiment of the invention, the tensioning ring can be slotted in the radial direction. The tensioning ring is thus not completely closed in the circumferential direction. In this case, the tensioning ring can have the aforementioned tool engagement, in particular in the form of a (so-called) eye, at each of its two free end sections. This is particularly advantageous in the case of a tensioning ring made of metal.

[0013] According to a preferred further embodiment of the present invention, the retaining section of the sealing ring has a surrounding sealing flange on the inner circumference, which cooperates with the retaining groove. The sealing flange can ensure a particularly reliable static sealing ability of the sealing unit on the shaft. The retaining flange can itself rest against the side surface or groove bottom of the retaining groove in a static sealing manner in the radial direction and / or in the axial direction.

[0014] According to an alternative embodiment of the present invention, the retaining section has a toothed edge section at least partially on the inner circumference, which cooperates with the retaining groove. This makes it easier to assemble and disassemble the sealing unit and realize a sealing ring with reduced material usage. The toothed edge section can also define a pocket-shaped tool fitting. For sealing reasons, the tool fitting is preferably limited in the axial direction by a surrounding (fine) sealing ring or sealing flange of the retaining section. The sealing ring or sealing flange can at least partially form the back side of the sealing unit. The sealing ring or sealing flange can be sealed against the groove side on the inner side of the retaining groove in the axial direction.

[0015] According to a particularly preferred embodiment, the retaining section of the sealing ring is preferably supported in a circumferential and sealing manner on the circumferential surface of the shaft in a supporting area outside the retaining groove. In other words, the retaining section extends outward from the retaining groove in an axial direction relative to the axis of rotation of the shaft away from the retaining groove and surrounds the shaft in contact. As a result, the retaining section can withstand greater torques on the one hand without excessive deformation or being unable to be pried out of the retaining groove. In short, a particularly large dynamic contact pressure of the sealing lip on the housing can be achieved at a small structural depth of the sealing unit. In addition, another static sealing area or static sealing plane between the sealing ring and the shaft can be realized outside the retaining groove. In short, this is beneficial to the sealing function of the sealing unit.

[0016] If the aforementioned supporting region of the retaining section of the sealing ring is arranged offset outwardly in the axial direction relative to the dynamic sealing plane of the sealing lip, the retaining section of the sealing ring can absorb particularly large moments.

[0017] According to the invention, the tensioning ring can also have a first ring segment and a second ring segment, which are arranged alternately one after the other in the circumferential direction of the tensioning ring, wherein the first ring segment is less elastically deformable than the second ring segment and are connected to each other via the second ring segment. This design is particularly advantageous in the case of polymer elastic rings. The second ring segment enables elastic widening of the tensioning ring, which is necessary, for example, for assembly and, if necessary, also for disassembly of the sealing unit.

[0018] The aforementioned tool seats of the clamping ring can advantageously each be formed by one of the first ring segments.

[0019] According to the invention, the sealing ring is preferably injection molded onto the tensioning ring. This enables particularly cost-effective mass production of the sealing device. According to the invention, the tensioning ring can be implemented as an injection molded part, a stamped part or also a 3D printed part. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Further advantages of the present invention are obtained from the description and the drawings. The present invention is explained in detail below with the aid of the embodiments described in the drawings. The embodiments shown and described are not to be understood as a final enumeration, but rather have exemplary features for describing the present invention. In the drawings:

[0021] Figure 1 A sealing device is shown in a partial sectional view, which has a housing and a shaft rotatably arranged in the housing, the sealing device being in the form of a pedal bearing sealing device in this case by way of example, with a pedal crank fastened to the shaft, wherein the sealing unit serves to seal a bearing gap or sealing gap formed between the shaft and the housing;

[0022] Figure 2 Shown in exposed perspective view with Figure 1 The sealing unit is similar to the sealing unit;

[0023] Figure 3 The first cross-sectional view shows Figure 2 Sealing unit;

[0024] Figure 4 The cross-sectional view shows the Figure 2 A sealing assembly of a sealing unit;

[0025] Figure 5 A further embodiment of the sealing unit is shown in a perspective view from the front;

[0026] Figure 6 The detailed partial diagram shows the Figure 5 The sealing unit is similar to the sealing unit;

[0027] Figure 7 A further exemplary embodiment of a sealing unit is shown in a perspective view from the front, which has a metallic clamping ring and an edge-side tool engagement;

[0028] Figure 8 The side view below shows Figure 7 Sealing unit;

[0029] Fig. 9 The sealing unit with the clamping ring designed as a clamping ring is shown in a side view laterally;

[0030] Fig.10 The front side view shows the Fig. 9a sealing unit having a one-piece closing element for sealingly closing a tool seat of the clamping ring; and

[0031] Fig.11 In Fig. 9 The cross-sectional view in the section plane marked with AA shows the Fig. 9 Sealed unit. DETAILED DESCRIPTION

[0032] Figure 1 A sealing arrangement 10 is shown, which is purely by way of example in the form of a pedal bearing sealing arrangement for bicycles, electric assisted vehicles and the like. The sealing arrangement 10 comprises a housing 12 and a shaft 14, which extends through the housing 12 and is mounted in the housing 12 so as to be rotatable about an axis of rotation 16. A pedal crank 18, which is known per se, can be fastened to the shaft 14 at both ends. At least two inner bearings 20 are used here to support the shaft 14, wherein the inner bearings 20 are provided in the housing 12 so as to be rotatable about an axis of rotation 16. Figure 1 For illustration purposes, only one inner bearing is shown. The individual components of the inner bearing 20 can each be implemented as an inseparable unit. The inner bearing 20 can also be implemented as a so-called cartridge bearing in a manner known per se. The sealing unit, generally designated 24, serves to seal the sealing gap 22 formed between the housing 12 and the shaft 14 relative to the outer side or contaminated side A of the sealing assembly 10. The sealing unit 24 comprises a sealing ring 26 and a tensioning ring 28. The sealing ring 26 is made of a basic material that is elastically, preferably rubber-elastically deformable. In particular, an elastomer is suitable as the basic material. The sealing ring 26 has a retaining section 30 and a sealing lip 32, which extends outwardly away from the retaining section 30 in a radial direction relative to a central axis 34 of the sealing ring 26 or the sealing unit 24. The sealing lip has a sealing edge 35. The central axis 34 of the sealing ring 26 coincides with the axis of rotation 16. The sealing lip 32 rests on a sealing surface 36 of the housing 12 in the axial direction in a dynamic sealing manner in the region of the dynamic sealing plane E due to the inherent elasticity of its basic material itself. The sealing surface 36 can be Figure 1 In particular, it is formed by an end face 38 of the housing 12 .

[0033] The clamping ring 28 serves to axially fix the retaining section 30 of the sealing ring 26 in a retaining groove 40 of the shaft 14 and ensures a radially prestressed and circumferentially statically sealed contact of the retaining section 30 of the sealing ring 26 on the shaft 14 .

[0034] The elastically deformable base material of the sealing ring 26 can be injection-molded onto the clamping ring 28 , for example.

[0035] exist Figures 2 to 4 The sealing unit 24 is shown in FIG. 1 , which corresponds largely to the sealing unit according to Figure 1 The sealing unit 24 is provided.

[0036] The sealing unit 24 faces outwards in its assembled state (A, see Figure 1 ) has a plurality of tool seats 44, 46 on the front side 42. The tool seats 44, 46 are each formed by a clamping ring 28 here. The tool seats 44, 46 are each designed as blind hole recesses open toward the front side 42 here.

[0037] The first tool engagement portion 44 is used for engagement with a clamping ring pliers or the like, by means of which the clamping ring 28 can be widened for mounting / dismounting the sealing unit 24. The clamping ring 28 is designed to be closed in the circumferential direction, but according to an alternative design it can also be designed to be slotted in the radial direction. In this case, the clamping ring 28 has two free end sections 48 facing each other (in the circumferential direction). The end sections 48 are then preferably provided with the first tool engagement portion 44.

[0038] The second tool engagement portions 46 are arranged one after the other at regular intervals in the circumferential direction of the tensioning ring 28. The second tool engagement portions 46 can in particular have a rectangular opening cross section and are used to engage with a tool knife, such as a screwdriver (not shown). The sealing unit 24 can be removed from its assembly position ( ) in the retaining groove 40 without special tools (but possibly without damage) by means of the second tool engagement portions 46. Figure 1 )

[0039] Tension ring 28 according to Figure 3 and 4 The first and second ring segments 50, 52 are arranged alternately one after the other in the circumferential direction of the tensioning ring 28. The first ring segments 50 each form one of the tool fittings 44, 46 and are less elastically deformable in the radial direction than the second ring segments 52, by which the first ring segments are flexibly connected to each other. As a result, the sealing ring 26 and the tensioning ring 28 can be connected to the shaft (14, Figure 1 ) on the common expansion and axial movement to simplify the assembly of the sealing unit 24.

[0040] The clamping ring 28 is made of a material having a higher modulus, in this case a polymer material, than the material of the sealing ring 26. The clamping ring 28 can be designed as an injection-molded part or also as a 3D-printed part.

[0041] Figures 2 to 4 The holding section of the sealing unit 24 shown in FIG. Figure 3 and 4The sealing flange 54 has a mounting flange and a sealing flange 54 on the inner circumference, which extend radially in the direction of the center axis 34 away from the remaining holding section 30. The sealing flange 54 can have a rectangular cross-sectional shape and a preferably circular inner cross-section or a circular inner contour. The sealing flange 54 is in contact with the holding groove 40 ( Figure 4 ) are sealed. The sealing flange 54 here rests against the groove bottom 56 of the retaining groove 40 in a static sealing manner in the radial direction. As a result, a first static sealing area 58 is formed between the shaft 14 and the sealing unit 24. It should be noted that the tensioning ring 28 can only be intermittently, that is, in sections, in the circumferential direction with the retaining groove 40, as shown in FIG. Figure 4 and 5 Particularly advantageously, the clamping ring 28 cooperates with the retaining groove 40 at least with its first ring section 50 .

[0042] according to Figure 4 , the sealing unit 24 extends in the axial direction toward the outside A away from the retaining groove 40. The retaining section 30 is supported in the radial direction on the circumferential surface 60 of the shaft 14 in the support area S outside the retaining groove 40. This achieves sufficient contact pressure between the sealing lip 32 and the sealing surface 36 of the housing 12 on the one hand. In addition, a further static sealing area 58 between the shaft 14 and the sealing unit 24 is formed in the circumferential sealing contact of the retaining section 30 on the shaft 14. Therefore, the sealing ring 26 rests on the shaft 14 in a static sealing manner in the region of at least two sealing areas 58 axially spaced apart from each other.

[0043] The sealing unit 24 can be configured according to Figure 4 The sealing unit 24 is arranged completely with axial play in the retaining groove 40 , thereby facilitating the assembly of the sealing unit 24 and preventing possible damage to the retaining section 30 .

[0044] Figure 5 A further sealing unit 24 is shown, which differs from the previously described sealing unit 24 essentially in that the retaining section 30 of the sealing ring 26 has a toothed edge section 62 on the inner circumference, which has a pocket-shaped third tool engagement portion 64. The third tool engagement portions 64 are arranged one behind the other at a distance from one another in the circumferential direction and are respectively delimited on both sides by teeth 66 of the edge section 62. The teeth 66 protrude radially in the direction of the center axis 34 beyond the remaining retaining section 30.

[0045] according to Figure 6The third tool fitting 64 can be axially delimited in the direction of the back side 68 of the sealing unit 24 by the sealing flange 54 on the inner circumference of the sealing ring 26. In the installed state of the sealing unit 24, the retaining section 30 is engaged with the retaining groove 40 ( Figure 1 and 4 ) fit, while the static sealing effect of the retaining section 30 inside the retaining groove 40 is achieved by a (fine) sealing flange 54. The sealing flange rests sealingly on the inner groove side 70 of the retaining groove 40 in the axial direction. The third tool fitting 64 arranged further centrally allows a more efficient widening of the sealing unit 24 for the purpose of mounting the sealing unit or further simplifying the prying out of the retaining groove 40 of the shaft 14.

[0046] The tensioning ring 28 of the sealing unit 24 can be adjusted according to the Figure 7 and 8 The embodiment shown in is also made of metal. In this case, the tensioning ring 28 is designed as a non-slit (=completely closed) collar, which is arranged to be at least partially embedded in the material of the sealing ring 26 and retained. The tensioning ring 28 is completely covered on the front side (towards the outside A in the installed state) by the elastically deformable material of the sealing ring 26 to ensure a reliable sealing ability of the sealing unit 24. The sealing unit 24 is provided here purely by way of example with a front joint. Figure 5 and 6 The bag-shaped third tool fitting part 64. It should be noted that the sealing unit can also have a plurality of the aforementioned first tool fitting parts or second tool fitting parts 44, 46 in addition to or instead of the third tool fitting part 64 on the metal tensioning ring.

[0047] according to Figures 9 to 11In the sealing unit 24 shown in FIG. 2 , the tensioning ring 28 can alternatively also be implemented in the form of a (slit) clamping ring made of metal, which is at least partially embedded in the material of the sealing ring. The two free end sections 48 of the tensioning ring 28 are each configured with a first tool fitting 44 in the form of an eye for receiving a tensioning pliers (not shown). The tensioning ring 28 is arranged on the back side 68 of the sealing unit 24. For sealing reasons, the tensioning ring 28 is completely covered by the material of the sealing ring 26 on the front side in the axial direction. The sealing ring 26 can include one or more plugs or closing elements 72, which extend from the front side 42 of the sealing unit 24 into the two eyes of the tensioning ring 28 and close the eyes in a fluid-tight and particle-tight manner. It is understood that the sealing rings each have a through recess for the closing element 72, which is not specifically shown in the drawings, and is arranged axially aligned with the first tool fitting 44. The closing element 72 can be fixedly bonded to the rest of the sealing ring 26 as required. Alternatively or additionally, as in accordance with Fig.11 In the cross-sectional view along Fig. 9 As shown in the sectional plane AA shown in FIG. 2 , each closure element 72 can be arranged to be retained in a press-fit manner in the first tool seat 44 of the clamping ring 28 . The closure elements 72 can be designed integrally with one another.

[0048] The sealing ring 26 can have a plurality of Figures 2 to 4 The embodiment of the present invention may have a surrounding sealing flange 54 or also a toothed retaining section with a fine sealing flange 54 (see Figure 7-10 ).

Claims

1. A sealing assembly (10), comprising a housing (12) and a shaft (14), and a sealing unit (24), wherein the shaft is supported in the housing (12) so as to be rotatable about a rotation axis (16), and the sealing unit is used to seal a sealing gap (22) formed between the housing (12) and the shaft (14) relative to an outer side A of the housing (12), in, The sealing unit (24) comprises: a sealing ring (26) having a retaining section (30) and a sealing lip (32), the sealing lip extending outwardly away from the retaining section (30) in a radial direction and resting in a dynamically sealing manner on a sealing surface (36) of the housing (12) in an axial direction; and an internally tensioned tensioning ring (28), which is arranged to be embedded in the material of the sealing ring (26) and by means of which the axial positional fixation of the retaining section (30) in the retaining groove (40) and the circumferentially prestressed static sealing contact of the retaining section (30) on the shaft (14) are achieved, It is characterized in that the retaining section (30) of the sealing ring (26) has a circumferential sealing flange (54) on the inner circumference, which cooperates with the retaining groove (40), and the tensioning ring (28) has a plurality of tool engagement parts (44, 46, 64) which can be accessed from the outside A.

2. The sealing assembly (10) according to claim 1, characterized in that: The clamping ring (28) cooperates with the retaining groove (40) at least in sections in the radial direction.

3. The sealing assembly (10) according to claim 1 or 2, characterized in that: The tensioning ring (28) is made of a polymer material or metal.

4. The sealing assembly (10) according to claim 1, characterized in that: The clamping ring (28) is slotted and has a tool engagement portion (44, 46, 64), in particular in the form of an eye, at its free end sections (48).

5. The sealing assembly (10) according to claim 1 or 4, characterized in that: At least some of the tool engagement portions (44, 46, 64) are preferably arranged regularly spaced apart from one another and arranged one behind the other in the circumferential direction of the tensioning ring (28).

6. The sealing assembly (10) according to claim 1 or 2, characterized in that: At least a portion of the tool engagement portions (44, 46, 64) is implemented in the form of a blind hole open toward the outside A.

7. The sealing assembly (10) according to claim 1 or 2, characterized in that: At least a portion of the tool seat (44, 46, 64) is designed as an axial through-recess of the clamping ring (28), which is completely sealed on the outside by the sealing ring (26) in the axial direction.

8. The sealing assembly (10) according to claim 7, characterized in that The sealing ring (10) has a detachably arranged closing element (72) for sealing the tool seat (44, 46, 64), the closing element being arranged to be bonded, welded or press-fitted to the rest of the sealing ring (26) and / or held on the sealing ring (26) and / or the tensioning ring (28).

9. The sealing assembly according to claim 8, characterized in that: The closure element (72) consists of the same material as the rest of the sealing ring (26) and / or the closure element (72) is designed integrally therewith.

10. The sealing assembly (10) according to claim 1 or 2, characterized in that The retaining section (30) of the sealing ring (26) has a toothed edge section (62) having a plurality of tool seats (44, 46, 64) which are respectively delimited on both sides in the circumferential direction by teeth (66) of the edge section (62).

11. The sealing assembly (10) according to claim 10, characterized in that At least a portion of the tool seat (44, 46, 64) is delimited in the axial direction by a circumferential sealing flange (54) of the retaining section (30), wherein the sealing flange (54) preferably bears sealingly against an inner groove side surface (70) of the retaining groove (40).

12. The sealing assembly (10) according to claim 1 or 2, characterized in that: The retaining section (30) of the sealing ring (26) is supported in a support region S outside the retaining groove (40) in a radial direction on a circumferentially sealing manner on a circumferential surface (60) of the shaft (14).

13. The sealing assembly (10) according to claim 12, characterized in that The support region S is arranged offset outwardly relative to a dynamic sealing plane E of the sealing lip (32) in the axial direction, or the dynamic sealing plane E intersects the support region S.

14. The sealing assembly (10) according to claim 1 or 2, characterized in that: The tensioning ring (28) has a first ring segment and a second ring segment (50, 52), which are arranged alternately one after the other in a circumferential direction, wherein the first ring segment (50) is less elastically deformable than the second ring segment (52), and wherein the first ring segments (50) are flexibly connected to one another via the second ring segment (52).

15. The sealing assembly (10) according to claim 14, characterized in that At least a portion of a tool engagement portion (44, 46, 64) of the clamping ring (28) is respectively formed by one of the first ring segments (50).

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