Hydraulic assembly, housing assembly for a hydraulic assembly, and method of manufacturing a housing assembly

Abstract

A housing assembly for a hydraulic assembly includes a housing member that at least partially defines an internal volume and has a through-hole that extends between an inner surface of the housing member on the internal volume side and an outer surface that is oriented in the opposite direction, and a region of the inner surface surrounding the through-hole forms a recess. Further, the housing assembly includes a tension anchor that extends into the internal volume of the housing member with an inner portion and protrudes through the through-hole, such that an outer portion of the tension anchor protrudes beyond the outer surface of the housing member, a tension anchor, a nut that engages with the inner portion of the tension anchor and has a sealing surface, and a sealing element that is disposed in the recess and abuts against the inner portion of the tension anchor, the region of the inner surface surrounding the through-hole, and the sealing surface of the nut.

Description

Technical Field

[0001] The present invention relates to a hydraulic assembly, in particular a hydraulic assembly for a hydraulic braking system, a housing assembly for a hydraulic assembly, and a method for manufacturing a housing assembly.

Background Art

[0002] In a hydraulic braking system of a vehicle, a braking booster, such as an electric braking booster, is usually used. The functional principle of this type of braking booster is based on amplifying the power provided to an operating mechanism, such as a pedal, by operating a hydraulic pressure generating mechanism, such as a brake master cylinder, via a transmission by means of an electric motor. In this case, it is normal for a transmission to linearly displace an operating assembly connected to the pressure generating mechanism, where the operating assembly is received within a housing member and is linearly displaceably supported by at least one tension anchor provided within the housing member.

[0003] Patent Document 1 describes a hydraulic assembly including a housing assembly and a brake master cylinder as a hydraulic device. The housing assembly has a housing member and a tension anchor extending through an opening of the housing member. The hydraulic device is attached to the outer surface of the housing member. In this case, the tension anchor protrudes through a hole within a flange of the hydraulic device. To seal the opening of the housing member in a liquid-tight manner, a sealing element for sealing the housing is provided between the flange and the outer surface of the housing. On the inner surface of the housing, a flat anchor nut is screwed with the tension anchor to fix it. Therefore, the structural length of the anchor nut is short, and as a result, a long guide surface is provided for the tension anchor, realizing a sufficient stroke length of the operating assembly guided by the tension anchor even when the structural length is limited. When removing the hydraulic device from the housing assembly, for example, for maintenance or replacement, it is necessary to replace the sealing element.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

[0005] According to the present invention, there is provided a housing assembly having the configuration of claim 1, a hydraulic assembly having the configuration of claim 9, and a method having the configuration of claim 10.

[0006] According to a first aspect of the present invention, a housing assembly for a hydraulic assembly includes a housing member that at least partially defines an internal volume and has a through-hole, wherein the through-hole extends between an inner surface of the housing member on the side of the internal volume and an outer surface that is oriented in the opposite direction, and in this case, a region of the inner surface surrounding the through-hole forms a recess. The housing assembly further includes a tension anchor that extends into the internal volume of the housing member with an inner portion and protrudes through the through-hole, so that an outer portion of the tension anchor protrudes beyond the outer surface of the housing member, the tension anchor, an anchor nut that is screwed together with the inner portion of the tension anchor and has a sealing surface, and a sealing element that is disposed in the recess and abuts against the inner portion of the tension anchor, the region of the inner surface surrounding the through-hole, and the sealing surface of the anchor nut.

[0007] According to a second aspect of the present invention, a hydraulic assembly is provided, in particular a hydraulic assembly for a hydraulic braking system. The hydraulic assembly includes a housing assembly according to the first aspect of the present invention and a hydraulic device having a flange in which a hole is formed. The outer portion of the tension anchor protrudes through the hole in the flange, and the hydraulic device is fixed to the housing assembly via the tension anchor.

[0008] According to a third aspect of the present invention, a method for manufacturing a housing assembly according to the first aspect of the present invention is provided. The method includes disposing the sealing element in the recess of the housing member, passing the tension anchor through the through-hole of the housing member, screwing the anchor nut together with the tension anchor, and bringing the sealing element into contact with the sealing surface of the anchor nut, the region of the inner surface surrounding the through-hole, and the inner portion of the tension anchor.

[0009] The idea underlying the present invention is that in a housing assembly for a hydraulic assembly, a recess is provided on the inner surface of the housing member in the region surrounding the through-hole, and a sealing element attached to the tension anchor is arranged in the recess. In this way, the sealing element abuts against the outer peripheral surface of the tension anchor extending through the through-hole, the inner surface of the housing member, and the sealing surface of the anchor nut screwed with the tension anchor within the internal space of the housing.

[0010] By forming a recess in the inner surface of the housing member, the structural space required for the sealing element within the internal space of the housing member is reduced. Therefore, even though the sealing element is arranged within the internal space, the stroke length for the sliding bearing of a component guided by the tension anchor, for example, the operating assembly of a brake booster device, can be extended. At the same time, without the need to replace the sealing element with a new one, the hydraulic device attached to the tension anchor on the outer surface of the housing member can be replaced, removed, and newly attached.

[0011] Therefore, especially when the hydraulic device is removed, newly attached, or replaced, the sealing element seals the through-hole in a liquid-tight manner. Therefore, the sealing element is protected from damage in an improved manner.

[0012] Advantageous configurations and further configurations are apparent from the further dependent claims and from the description with reference to the figures of the drawings.

[0013] According to many embodiments, it may be considered that the through-hole is formed circularly and the recess has a conical portion.

[0014] According to many embodiments, it may be contemplated that the housing member is shaped in a region surrounding the through-hole such that a recess is formed on the inner surface and a raised portion corresponding to the outer surface is formed. For example, the housing member may have a substantially flat, particularly plate-shaped cover portion, and a through-hole is formed in this cover portion. In this case, the cover portion is shaped such that the region surrounding the through-hole forms a recess on the inner surface and a convex or raised portion on the outer surface. For example, the housing member, particularly the cover portion, may be formed from a thin metal plate, and in this case, the recess and the raised portion are manufactured by a press forming method. Optionally, the housing member may have a certain thickness in the region where the recess and the raised portion are formed. Providing a raised portion in addition to the recess facilitates manufacturing and increases the torsional rigidity of the housing member. Further, a recess surrounding the hole may be formed in the flange of the hydraulic device, for example, in the form of a phase, and a convex portion is received in this recess.

[0015] According to many embodiments, it may be contemplated that the recess has a depth in the range between 1 mm and 4 mm. In particular, the recess may have a depth between 1.5 mm and 3.5 mm. In this range, a significant extension of the stroke available in the tension anchor is obtained, and at the same time, the sealing element can be dimensioned relatively large, which further improves the sealing effect.

[0016] According to many embodiments, the anchor nut has an inner hole provided with an internal thread, and the internal thread is screwed with an external thread formed on the inner part of the tension anchor. In this case, it may be contemplated that the sealing surface of the anchor nut extends at a distance from at least partially the end of the external thread on the outer part side of the tension anchor. Accordingly, the region of the sealing surface of the anchor nut where the sealing element abuts is located at a distance from the external thread of the tension anchor. In this way, the sealing element is further protected from damage and its sealing effect is further improved.

[0017] According to many embodiments, it may be contemplated that the female thread of the anchor nut and the male thread of the tension anchor have an overlap in the range between 60 percent and 95 percent with respect to the entire thread length of the female thread. That is, the nut is screwed beyond the end of the male thread of the tension anchor, and as a result, the end of the nut on the outer part side of the tension anchor is positioned at a distance from the end of the male thread. This additionally ensures that the sealing element is not damaged by the male thread of the anchor. At the same time, in this overlap region, a relatively large friction surface is obtained between the threads, which facilitates the prevention of the optional twisting of the anchor nut.

[0018] According to many embodiments, it may be contemplated that the inner hole projects beyond the end of the male thread in the direction of the outer part of the tension anchor, and that the sealing surface of the anchor nut is formed in the inner hole of the anchor nut. For example, the anchor nut may abut against the inner surface of the housing member with an end face, and the sealing surface provided in the inner hole abuts against the sealing element. In this way, the predetermined positioning of the anchor nut with respect to the housing member, and thus the predetermined positioning of the tension anchor with respect to the housing member, is facilitated.

[0019] According to many embodiments, it may be contemplated that the sealing surface of the anchor nut is formed in the inner hole of the anchor nut as a phase. In this way, by the sealing surface bending and extending, a force in the axial direction, that is, a force along the tension anchor, and a force in the radial direction, that is, a force transverse to the tension anchor, also act on the sealing element. Therefore, the sealing element is pressed against the inner surface of the housing member and against the outer peripheral surface of the tension anchor in a further improved manner.

[0020] According to many embodiments, it may be contemplated that the anchor nut is non-rotatably fixed to the tension anchor, particularly by a crimping connection. Correspondingly, the method may include non-rotatably fixing an anchor nut screwed onto the tension anchor to the tension anchor. For example, the anchor nut may have an external hexagon on its outer circumference and may be plastically press-fitted radially by at least two sides, preferably three sides, so as to plastically deform at least the female thread and optionally also the male thread of the tension anchor. This connection, called crimping, has the advantage that no additional parts are required to fix the nut, and at the same time, reliable anti-torsion is provided. Alternatively, other anti-rotation means may be provided.

[0021] According to many embodiments, it may be contemplated that the sealing element is formed in a ring shape. For example, the sealing element may be formed as an O-ring.

[0022] According to many embodiments, it may be contemplated that the hydraulic device is formed in the form of a hydraulic pressure generating mechanism. For example, the hydraulic device may be a tandem brake master cylinder, a plunger, or the like.

[0023] Next, the present invention will be described with reference to a plurality of views of the drawings.

Brief Description of the Drawings

[0024]

Figure 1

Figure 2

Figure 3

Figure 4

Best Mode for Carrying Out the Invention

[0025] In the figures, unless otherwise specified, the same reference numerals represent the same components or components that are functionally the same.

[0026] FIG. 1 is a schematic cross-sectional view of a hydraulic assembly 200. The hydraulic assembly 200 has a housing assembly 100 and a hydraulic device 210. The hydraulic assembly 200 can be used, for example, as an assembly within an electric brake booster device for a vehicle, or such a brake booster device can have the hydraulic assembly 200.

[0027] Only a part of the hydraulic device 210 is shown in FIG. 1, and it has a flange 212 with at least one hole 214 provided therein. The hydraulic device 210 can be, for example, a hydraulic pressure generating device such as a brake master cylinder, particularly a tandem type brake master cylinder, a plunger, etc. The hydraulic device 210 can be mechanically operable particularly using an operation assembly 220. Only a part of the operation assembly 220 is also shown in FIG. 1, and as illustrated, it can have, for example, a coupling arm 221 and a sliding bearing 222 coupled to the coupling arm 221. The coupling arm 221 can operate the hydraulic device 210 by linearly displacing using, for example, an electric motor (not shown) kinematically connected to the operation assembly via a transmission (not shown).

[0028] As shown in FIG. 1, the housing assembly 100 has a housing member 1, a tension anchor 2, an anchor nut 3, and a sealing element 4.

[0029] The housing member 1 is only partially shown in FIG. 1. FIG. 2 is a schematic partial perspective view of the housing member 1. Generally, the housing member 1 at least partially defines or delimits an internal volume portion 10. As illustrated in FIGS. 1 and 2, the housing member 1 may have, for example, a substantially flat or plate-like cover portion 14 and a peripheral portion 16 extending laterally with respect thereto. Generally, the housing member 1 has an inner surface 1i on the side of the internal volume portion 10 or defining the internal volume portion 10, and an outer surface 1a facing in the opposite direction thereto. As further shown in FIGS. 1 and 2, the housing member 1 has a through hole 11, which extends between the inner surface 1i and the outer surface 1a of the housing member 1 and may be particularly formed in the cover portion 14. The through hole 11 may particularly have a circular peripheral portion. Further, a central connection hole 18 may be formed in the cover portion 14, and the central connection hole extends between the inner surface 1i and the outer surface 1a of the housing member 1 and is used to receive an operation interface of the hydraulic device 210. The housing member 1 may be formed of, for example, a metal material, particularly a thin metal plate. However, the present invention is not limited thereto.

[0030] As shown in FIG. 1, the region of the inner surface 1i surrounding the through hole 11 forms a recess 12. Accordingly, the through hole 11 is provided or disposed at the bottom or base 12B of the recess 12 formed in the inner surface 1i. As shown in FIGS. 1 and 3, the recess 12 may have a conical portion 12A. The opening angle of the conical portion 12A may be in the range between, for example, 70 degrees and 90 degrees. Further, optionally, the recess 12 may have a substantially flat bottom portion 12B, and the recess 12 is formed in this flat bottom portion. As illustrated in FIG. 2, the housing member 1 may further have a raised portion 13 on the outer surface 1a in the region surrounding the through hole 11. Accordingly, the housing member 1 may be shaped such that, as schematically shown in FIG. 1, a recess 12 is formed in the inner surface 1i and a complementary raised portion 13 corresponding to the outer surface 1a is formed. The recess 12 may have a depth t12 in the range between, for example, 1 mm and 4 mm (FIG. 3).

[0031] The tension anchor 2 is formed as a rod-shaped elongate member extending along the longitudinal axis A2. As shown in FIG. 1, the tension anchor 2 extends within the internal volume portion 10 and extends through the through-hole 11. The region of the tension anchor 2 within the internal volume portion 10 forms the inner portion 2A of the tension anchor 2, and the region of the tension anchor 2 defined by the outer surface 1a of the housing member 1 forms the outer portion 2B of the tension anchor 2. Accordingly, the tension anchor 2 extends laterally with respect to the cover portion 14. The outer portion 2B of the tension anchor 2 projects beyond the outer surface 1a of the housing member 1, particularly the cover portion 14.

[0032] As shown in FIG. 1, the inner portion 2A of the tension anchor 2 may have a male thread 20 in the region on the side of the through-hole 11. Further, the tension anchor 2 may have a guide portion 22 in its inner portion 2A, and a sliding bearing 222 is guided linearly or displaceably along the longitudinal axis A2 by the guide portion. The outer portion 2B of the tension anchor 2 simultaneously forms the end portion of the tension anchor and may optionally also be provided with a male thread 24. As can be seen in FIG. 1, the outer portion 2B may have a diameter that is at least partially, particularly in the region of the thread 24, smaller than the inner portion 2A in the region of the thread 20.

[0033] The anchor nut 3 is formed as a screwable sleeve. Correspondingly, the anchor nut 3 has an inner hole 30 provided with a female thread 31. Further, the anchor nut 3 has a sealing surface 3a, and the sealing surface may be provided, for example, in the inner hole 30. As illustrated in FIGS. 1 and 3, the sealing surface 3a may be formed in the inner hole 30 of the anchor nut 3 as a phase 32, for example. Accordingly, the phase 32 defines a conical contact surface or sealing surface 3a that can have an opening angle in the range between, for example, 100 degrees and 140 degrees. Optionally further, the anchor nut 3 may be provided with an external hexagon on its outer periphery.

[0034] As schematically shown in FIG. 1, the anchor nut 3 is screwed onto the male thread 20 provided on the inner portion 2A of the tension anchor 2. Optionally, the anchor nut 3 may be non-rotatably fixed to the tension anchor 2, particularly by crimping. For this purpose, the outer peripheral portion of the anchor nut 3 may have at least one plastic deformation portion in the form of a notch 34 that causes a plastic deformation portion 35 in the female thread 31. As further shown in FIG. 1, the anchor nut 3 abuts against the inner surface 1a of the housing member 1 with its end face 3b.

[0035] As further shown in Fig. 1, the outer portion 2B of the tension anchor 2 passes through the hole 214 of the flange 212. To fix the flange 212 to the housing member 1, an outer nut 216 may be provided. The outer nut is screwed with the male thread 24 of the outer portion 2B of the tension anchor 2 and clamps the flange 212 between itself and the housing member 1, particularly between the cover portion 14 of the housing member. Optionally, the outer nut 216 may similarly be fixed in a non-twistable manner by crimping connection with the tension anchor 2. As further recognized in Fig. 1, the flange 212 may have a recess 215 in the contact surface 212a on the side of the housing member 1 provided in the region surrounding the hole 214, and in this recess, a raised portion 13 optionally provided on the housing member 1 is received. However, the recess 215 may be provided independently of the raised portion of the housing member 1. The sealing element 4 may be particularly formed in a ring shape, for example, formed as an O-ring as illustrated in Figs. 1 and 3. As shown in Fig. 1, the sealing element 4 is disposed in a recess 12 provided in the inner surface 1i of the housing member 1 and thus surrounds the through hole 11. Further, the sealing element 4 wraps around the inner portion 2A of the tension anchor 2 and contacts the sealing surface 3a of the anchor nut 3. Thus, particularly as can be seen in Fig. 3, the sealing element 4 abuts against the inner surface 1i of the housing member 1, the outer peripheral surface of the tension anchor 2, and the sealing surface 3a of the anchor nut 3 within the recess 12. In this way, the sealing element 4 seals the through hole 11 in a liquid-tight manner, for example, sealing the through hole 11 against the outflow of liquid from the internal volume portion 10 or the intrusion of liquid into the internal volume portion 10. The sealing element 4 is particularly crushed or compressed between the sealing surface 3a of the anchor nut 3 and the region of the inner surface 1i forming the recess 12. In Fig. 3, the sealing paths sealed by the sealing element 4 are indicated by arrows P1, P2.

[0036] By disposing the sealing element 4 within the recess 12 on the inner surface 1i side of the housing member 1, the required space for the sealing element 4 within the internal volume portion 10 with respect to the longitudinal axis L1 is reduced. Accordingly, the guide portion 22 of the tension anchor 2 can reach relatively close to the inner surface 1i of the housing member 1 or the cover portion 14 in the axial direction. Therefore, it is effective to increase the stroke, that is, the distance, by which the sliding bearing 222 can be moved at the tension anchor 2. Also, disposing the sealing element 4 within the recess 12 on the inner surface 1i side of the housing member 1 provides the advantage that the sealing element 4 is well protected from external influences. In particular, when newly flange - fixing the hydraulic device 210 or when attaching a new hydraulic device 210, the hydraulic device 210 can be removed without damaging the sealing element 4 and / or without the need to replace the sealing element 4.

[0037] As illustrated in FIGS. 1 and 3, the anchor nut 3 may be positioned relative to the tension anchor 2 such that the sealing surface 3a of the anchor nut 3 extends at an interval, at least partially, with respect to the end portion of the external thread 20 of the tension anchor 2 on the outer portion 2B side. For example, as can be seen in FIG. 3, the inner hole 30 of the anchor nut 3 may project beyond the end of the external thread 20 of the tension anchor 2 with the conical sealing surface 3a provided thereon in this case. Thereby, it is possible to reliably avoid the sealing element 4 being damaged by the external thread 20.

[0038] FIG. 4 is a schematic view showing the flow of a method M for manufacturing the housing assembly 100. Hereinafter, an example of this method M will be described with reference to the housing assembly 100 described above. The method M includes placing the sealing element 4 in the recess 12 of the housing member 1 (M1), and in particular, positioning the male screw 20 and the guide portion 22 within the internal volume portion 10 of the housing member 1 and passing the tension anchor 2 through the through-hole 11 of the housing member 1 (step M2). Steps M1 and M2 can be carried out, in particular, by sliding the sealing element 4 over the tension anchor 2 and passing the tension anchor 2 through the through-hole 11 and positioning it within the recess. However, alternatively, the sealing element 4 can first be positioned within the recess 12 and then the tension anchor 2 can be passed through the sealing element 4 in step M2.

[0039] In a further step M3, as described above, the anchor nut 3 is screwed onto the tension anchor 2. The screwing M2 can be carried out before or after passing the tension anchor 2 through the through-hole 11 (step M2).

[0040] Furthermore, step M4 is carried out to bring the sealing element 4 into contact with the sealing surface 3a of the anchor nut 3, the region of the inner surface 1i surrounding the through-hole 11, and the inner portion 2A of the tension anchor 2. Step M4 can be carried out simultaneously with the implementation of steps M1 to M3. For example, the contact between the sealing element 4 and the inner portion 2A of the tension anchor 2 can be carried out during step M2. The contact between the sealing element 4 and the sealing surface 3a of the anchor nut 3, and the contact with the region of the inner surface 1i surrounding the through-hole 11 can be carried out, for example, by screwing in step M3.

[0041] Furthermore, optionally, an additional step M5 can be provided to fix the anchor nut 3 non-rotatably relative to the tension anchor, for example, by crimping.

[0042] The present invention has been illustratively described based on several embodiments above, but the present invention is not limited thereto and can be variously modified. In particular, combinations of some of the above embodiments are also conceivable.

Explanation of Signs

[0043] 1 Housing member 1a Outer surface of the housing member 1i Inner surface of the housing member 2 Tension anchor 2A Inner part of the tension anchor 2B Outer part of the tension anchor 3 Anchor nut 3a Sealing surface of the anchor nut 4 Sealing element 10 Internal volume part 11 Through hole 12 Recess 13 Protrusion 20 Male thread 30 Inner hole 31 Female thread 32 Phase 100 Housing assembly 200 Hydraulic assembly 210 Hydraulic device 212 Flange 214 Hole M Method for manufacturing a housing assembly M1 Step of disposing a sealing element in the recess of the housing member M2 Step of inserting the tension anchor through the through hole of the housing member M3 Step of screwing the anchor nut onto the tension anchor M4 Step of bringing the sealing element into contact with the sealing surface of the anchor nut, the region of the inner surface surrounding the through hole, and the inner part of the tension anchor

Claims

1. In a housing assembly (100) for a hydraulic assembly (200), a housing member (1) that at least partially defines an internal volume portion (10) and has a through-hole (11), wherein the through-hole (11) extends between an inner surface (1i) of the housing member (1) on the side of the internal volume portion (10) and an outer surface (1a) oriented in the opposite direction thereto, and a region of the inner surface (1i) surrounding the through-hole (11) forms a recess (12); the housing member (1); a tension anchor (2) having an inner portion (2A) that extends into the internal volume portion (10) of the housing member (1) and protrudes through the through-hole (11), such that an outer portion (2B) of the tension anchor (2) protrudes beyond the outer surface (1a) of the housing member (1); the tension anchor (2); an anchor nut (3) that is screwed onto the inner portion (2A) of the tension anchor (2) and has a sealing surface (3a); a sealing element (4) disposed in the recess (12) and in contact with the inner portion (2A) of the tension anchor (2), the region of the inner surface (1i) surrounding the through-hole (11), and the sealing surface (3a) of the anchor nut (3); The housing assembly (100) having the above.

2. The housing assembly (100) according to claim 1, wherein the housing member (1) is formed within the region surrounding the through-hole (11) such that the recess (12) is formed in the inner surface (1i) and a raised portion (13) corresponding to the outer surface (1a) is formed.

3. The housing assembly (100) according to claim 1 or 2, wherein the recess (12) has a depth (t12) in the range between 1 mm and 4 mm.

4. The anchor nut (3) has an inner hole (30) provided with an internal thread (31), the internal thread (31) being screwed with an external thread (20) formed on the inner part (2A) of the tension anchor (2), and the sealing surface (3a) of the anchor nut (3) extending at a distance from at least a part of the end of the external thread (20) on the outer part (2B) side of the tension anchor (2), the housing assembly (100) according to any one of claims 1 to 3.

5. The inner hole (30) projects beyond the end of the external thread (20) in the direction of the outer part (2B) of the tension anchor (2), and the sealing surface (3a) of the anchor nut (3) is formed in the inner hole (30) of the anchor nut (3), the housing assembly (100) according to claim 4.

6. The sealing surface (3a) of the anchor nut (3) is formed in the inner hole (30) of the anchor nut (3) as a phase (32), the housing assembly (100) according to claim 5.

7. The anchor nut (3) is fixed non-rotatably relative to the tension anchor (2), in particular by crimping, the housing assembly (100) according to any one of claims 1 to 6.

8. The sealing element (4) is formed in a ring shape, in particular as an O-ring, the housing assembly (100) according to any one of claims 1 to 7.

9. In particular, in a hydraulic assembly (200) for a hydraulic braking system, a housing assembly (100) according to any one of claims 1 to 8, a hydraulic device (210) in the form of a pressure generating mechanism, in particular, comprising a flange (212) in which a hole (214) is formed, having, the outer part (2B) of the tension anchor (2) projecting through the hole (214) of the flange (212), and the hydraulic device (210) being fixed to the housing assembly (100) via the tension anchor (2). Hydraulic assembly (200).

10. In a method (M) for manufacturing a housing assembly (100) according to any one of claims 1 to 8, Placing the sealing element (4) in the recess (12) of the housing member (1) (M1). Passing the tension anchor (2) through the through-hole (11) of the housing member (1) (M2). Threading the anchor nut (3) onto the tension anchor (2) (M3). Bringing the sealing element (4) into contact with the sealing surface (3a) of the anchor nut (3), the region of the inner surface (1i) surrounding the through-hole (11), and the inner portion (2A) of the tension anchor (2) (M4). A method (M) comprising the above steps.

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