Damper housing for a suspension strut and method for producing a damper housing

Abstract

The invention relates to a damper housing for a spring strut for a motor vehicle, comprising a base body which is at least partially cylindrical and comprising two retaining lugs fastened to the base body, in particular for fastening a wheel body to the damper housing, wherein each of the retaining lugs bears against the outer circumference of the base body over a portion of the outer circumference, wherein each retaining lug has a holding portion which protrudes from the base body, and wherein the two retaining lugs are designed as separate components and each retaining lug is welded to the base body by means of at least one weld seam, wherein the portions of each retaining lug which bear against the base body have at least two projections and a boundary edge of the retaining lug which connects the projections,wherein the at least one weld extends at least along side edges of the projections and along the boundary edge between the projections, and wherein a U-shaped insert plate is provided between the portions of the retaining tabs projecting from the base body of the damper housing.

Description

[0001] The invention relates to a damper housing for a spring strut for a motor vehicle, comprising a base body that is at least partially cylindrical and two retaining tabs attached to the base body, in particular for attaching a wheel body to the damper housing. The invention also relates to a method for producing a damper housing for a spring strut.

[0002] The invention is intended to provide an improved damper housing which is particularly suitable for small series production and is extremely durable.

[0003] According to the invention, a damper housing for a suspension strut having the features of claim 1 and a method for producing a damper housing for a suspension strut having the features of claim 12 are provided. Advantageous developments of the invention are mentioned in the respective subclaims.

[0004] A damper housing for a spring strut for a motor vehicle has a base body that is at least partially cylindrical and two retaining tabs fastened to the base body, in particular for fastening a wheel body to the damper housing. Each of the retaining tabs rests on the outer circumference of the base body over a section of the outer circumference. Each retaining tab has a holding section that protrudes from the base body. The two retaining tabs are designed as separate components, and each retaining tab is welded to the base body by means of at least one weld seam. The sections of each retaining tab that rest on the base body have at least two projections and a boundary edge of the retaining tab that connects the projections. The at least one weld seam extends at least along side edges of the projections and along the boundary edge between the projections.A U-shaped insert plate is provided between the sections of the retaining tabs protruding from the base body of the damper housing.

[0005] Connecting the two retaining tabs to the base body by means of at least one weld each enables production even in small series. The special shape of the retaining tabs, each with two projections, and the positioning of at least one weld enable the realization of a durable, in particular fatigue-resistant, damper housing. The damper housing is advantageously made of stainless steel. The U-shaped insert plate stabilizes the retaining tabs by allowing forces acting on the retaining tabs to be diverted via the insert plate and, conversely, to be introduced into the base body. The U-shaped insert plate allows the retaining tabs to be connected to the base body in a fatigue-resistant manner. A base of the U-shaped insert plate can be welded to the base body. The legs of the U-shaped insert plate can be spot-welded to the retaining tabs.The U-shaped insert plate allows the retaining tabs to be made of thinner, and potentially more flexible, material than in a design without an insert plate, since some of the forces are transferred to the base body via the U-shaped insert plate. This relieves the load on the weld seams that connect the retaining tabs to the base body, which are critical for durability, particularly fatigue strength. The thinner material also allows the retaining tabs themselves to be made somewhat more flexible, making them significantly less susceptible to bending loads or vibrations in the area where they are connected to the base body, and thus more resistant to fatigue.

[0006] In a further development of the invention, the projections have a shape that tapers away from the boundary edge.

[0007] Such a shape of the projections enables a uniform introduction of force from the retaining tabs into the base body of the damper housing and thus avoids stress peaks under load during driving.

[0008] In a further development of the invention, a respective outer side edge of the projections runs perpendicular to a central longitudinal axis of the base body of the damper housing.

[0009] The projections can be arranged on the lateral edge of the retaining tabs.

[0010] In a further development of the invention, a respective inner side edge of the projections runs obliquely to the boundary edge and obliquely to a central longitudinal axis of the base body of the damper housing.

[0011] In a further development of the invention, the boundary edge extends between the inner side edges of the projections and is arranged parallel to a central longitudinal axis of the base body of the damper housing.

[0012] In a further development of the invention, the sections of each retaining tab adjacent to the base body have a rectangular base section and the projections extend from the base section and the boundary edge delimits the base section.

[0013] In a further development of the invention, the U-shaped insert plate has a base and two legs extending from the base, wherein the base rests against the base body and is welded to the base body in the area of ​​the base.

[0014] The legs of the U-shaped insert plate can be connected to the retaining tabs, for example, by means of welding points.

[0015] In a further development of the invention, the sections of the retaining tabs projecting from the base body are not arranged parallel to one another, but a distance between the retaining tabs increases in a direction away from the base body.

[0016] For example, the distance between the retaining tabs can increase by two millimeters over a length of four centimeters, specifically over a length corresponding to the height of the legs of the U-shaped insert plate. If a wheel carrier is then positioned between the retaining tabs, fastening bolts and appropriate tightening torques can be used to slightly deform the two retaining tabs or the legs of the U-shaped insert plate, allowing them to rest flat against the mounting surfaces of the wheel carrier.

[0017] In a further development of the invention, the weld seam between the base body and the respective retaining tab is produced in several sections, namely first in a first weld seam section along the outer side edge of a first projection, then in a second weld seam section along the outer side edge of the second projection, and then in a third weld seam section along the front edge of the first or second projection, along the inner side edge of the first or second projection, along the boundary edge between the first and second projection, along the inner side edge of the second or first projection and along the front edge of the second or first projection.

[0018] By creating the weld seam in several sections, overheating of the material of the retaining tabs and the material of the strut's base body is avoided. This also largely prevents distortion caused by thermal expansion of the joined components during welding.

[0019] In a further development of the invention, the third weld seam section is welded continuously.

[0020] In a further development of the invention, the third weld seam section is welded continuously and without settling.

[0021] In a method for producing a damper housing according to the invention for a spring strut, it is provided that each of the retaining tabs is connected to the base body of the damper housing by means of at least one weld seam and that the weld seam is produced in several weld seam sections, namely first in a first weld seam section along the outer side edge of the first or second projection, then in a second weld seam section along the outer side edge of the second or first projection, and then in a third weld seam section along the front edge of the first or second projection, along the inner side edge of the first or second projection, along the boundary edge between the first and the second projection, along the inner side edge of the second or first projection and along the front edge of the second or first projection.

[0022] In a further development of the invention, firstly the first weld seam section is welded on the first retaining tab along the outer side edge of the first projection of the first retaining tab, then the second weld seam section is welded on the first retaining tab along the outer side edge of the second projection of the first retaining tab, then the first weld seam section is welded on the second retaining tab along the outer side edge of the first projection of the second retaining tab, then the second weld seam section is welded on the second retaining tab along the outer side edge of the second projection of the second retaining tab, then the third weld seam section is welded on the first retaining tab along the front edge of the first or second projection of the first retaining tab, along the inner side edge of the first or second projection of the second retaining tab.second projection of the first retaining tab, along the boundary edge between the projections of the first retaining tab, along the inner side edge of the second or first projection of the first retaining tab and along the front edge of the second or first projection of the first retaining tab and then the third weld seam section on the second retaining tab along the front edge of the first or second projection of the second retaining tab, along the inner side edge of the first or second projection of the second retaining tab, along the boundary edge between the projections of the second retaining tab, along the inner side edge of the second or first projection of the second retaining tab and along the front edge of the second or first projection of the second retaining tab.

[0023] In a further development of the invention, the third weld seam section is welded continuously.

[0024] In a further development of the invention, the weld seam section is welded continuously and without settling.

[0025] In a further development of the invention, the arrangement of a U-shaped insert plate between the sections of the retaining tabs protruding from the base body of the damper housing is provided.

[0026] In a further development of the invention, the U-shaped insert plate has a base and two legs extending from the base, wherein the base rests against the base body and wherein the U-shaped insert plate is welded to the base body in the area of ​​the base.

[0027] In a further development of the invention, the U-shaped insert sheet is connected to a retaining tab by means of at least one welding point.

[0028] Further features and advantages of the invention will become apparent from the claims and the following description of a preferred embodiment of the invention in conjunction with the drawings.

[0029] The drawings show: Fig. 1 a view of a damper housing according to the invention for a spring strut in a view obliquely from above, Fig. 2 the damper housing of the Fig. 1 from the bottom, Fig. 3 the damper housing of the Fig. 1 from the side, Fig. 4 the damper housing of the Fig. 1 from top, Fig. 5 the damper housing of the Fig. 1 in a first front view, Fig. 6 the damper housing of the Fig. 2 in a second front view, Fig. 7 a sectioned first side view of the damper housing of the Fig. 1 to clarify the sequence of production of the weld sections, Fig. 8 a second sectional side view of the damper housing of the Fig. 1 to clarify the sequence of production of the weld sections, Fig. 9 a side view of one of the retaining tabs of the damper housing of the Fig. 1, Fig. 10 a view from above of the retaining tab of the Fig. 10, Fig. 11 a front view of the two retaining tabs of the damper housing of the Fig. 1 without the damper housing, Fig. 12 a view of a U-shaped insert plate of the damper housing of the Fig. 1 from diagonally above, Fig. 13 a front view of the insert plate of the Fig. 12, Fig. 14 a side view of the insert plate of the Fig. 12, and Fig. 15 a top view of the insert plate of the Fig. 12.

[0030] Fig. 1 shows, in an oblique view from above, a damper housing 10 according to the invention for a spring strut for a motor vehicle. The damper housing 10 has a base body 12, which has a first cylindrical section 14 with a smaller diameter and a second cylindrical section 16 with a slightly larger diameter. The first cylindrical section 14 can be provided with an external thread in order to be able to adjust the position of a spring plate for a spring of the spring strut relative to the base body 12. The base body 12 is tubular, and a shock absorber mechanism can be arranged within the base body 12. The damper housing 12 is made entirely of stainless steel. The spring strut then serves to attach a wheel carrier to a vehicle frame or vehicle body.For this purpose, as explained, a shock absorber mechanism is arranged within the base body 12 and a spring plate is arranged on the first cylindrical section 14. The shock absorber mechanism and the spring are then connected to a body-side part of the spring strut (not shown), and the body-side part can connect the spring strut to the body or frame of a vehicle. In the area of ​​the second cylindrical section 16, a first retaining tab 18 and a second retaining tab 20 are provided, which protrude from the cylindrical base body 12 and between which a fastening section of a wheel carrier can be arranged. A steering knuckle, a wheel bearing, and usually a brake disc are then located on the wheel carrier, and a vehicle wheel can ultimately be attached to the wheel hub. The spring strut thus establishes a connection between the wheel carrier and a vehicle body or frame.

[0031] Within the scope of the invention, the base body 12 can also be used in a different configuration of the spring strut, so that, for example, the first retaining tab 18 and the second retaining tab 20 serve to fasten the spring strut to a vehicle body or a vehicle frame.

[0032] Essential to the invention is the connection of the two retaining tabs 18, 20 with the base body 12.

[0033] In typical mass production of struts, retaining tabs are manufactured as a single piece from a sheet metal wrapped around the base body or are connected with a cup-shaped cross-section to secure the retaining tabs to the base body. In this way, the state of the art creates a clamp that surrounds the base body over more than 180°, or a cup that completely surrounds the base body. This clamp already holds the base body 12 in a form-fitting manner and only needs to be spot-welded or secured with a weld seam for fixation. The production of such clamps or cup-shaped structures requires heavy and expensive tools that are not economically viable for small-batch production.

[0034] In the damper housing 10 according to the invention, the two retaining tabs 18, 20 are therefore designed as separate components and are each individually fastened to the base body 12. For fastening the retaining tab 18 to the base body 12, a Fig. 1 for the sake of clarity, a weld seam is not shown. In the same way, at least one second weld seam is provided for fastening the second retaining tab 20 to the base body 12, which Fig. 1 is not shown for the sake of clarity, but its course can be seen from the Fig. 3 and can be seen from the Fig. 3 as well as the Fig. 8 and Fig. 9 will be explained in more detail.

[0035] By attaching the two retaining tabs 18, 20 to the base body 12 by means of at least one weld seam each, no expensive tools are required to form the two retaining tabs as part of a clamp that partially surrounds the base body, as in the prior art. This allows the damper housing 10 according to the invention to be manufactured economically, even in small series. The special design, in particular the shape, of the two retaining tabs 18, 20, as well as the special design of the weld seam for connecting the retaining tabs 18, 20 to the base body 12, results in an extremely stable and, above all, fatigue-resistant and thus permanently durable connection.

[0036] A U-shaped fastening bracket 22 is also provided on the base body 12, as well as further fastening tabs 24, for example for the arrangement of brake lines and for the arrangement of holders for a stabilizer.

[0037] In Fig. 1 already shows a U-shaped insert plate 26, which has a base and two legs extending from the base. The base of the U-shaped insert plate rests on the base body 12 and, as explained below, is welded to the base body 12. By welding only the base of the U-shaped insert plate 26 to the base body, the two legs of the insert plate, which each rest against an inner side of the retaining tabs 18, 20, can still be slightly deformed and, when a wheel carrier is attached to the retaining tabs 18, 20, undergo a slight deformation of the two retaining tabs 18, 20. As a result, a wheel carrier can be clamped between the two retaining tabs 18, 20 or between the two legs of the U-shaped insert plate 26 and the mutually facing inner sides of the legs of the U-shaped insert plate 26 can then lie flat against the outer surfaces of the wheel carrier (not shown).The U-shaped insert plate 26 helps to transfer forces from the wheel carrier evenly into the damper housing 12 during driving operation and thus avoid stress peaks.

[0038] Fig. Figure 2 shows a bottom view of the damper housing 10. The underside of the retaining bracket 22 and the retaining tabs 24 are visible.

[0039] Fig. Figure 3 shows a side view of the damper housing 10. In this view, only the first retaining tab 18 is visible. Fig. 3 shows a weld seam 30 with which the first retaining tab 18 is welded to the base body 12. The weld seam 30 has a first weld seam section 32, a second weld seam section 34, and a third weld seam section 36. The first weld seam section 32 extends along a side edge of a first projection 38 of the first retaining tab 18. The second weld seam section 34 extends along an outer side edge of a second projection 40 of the first retaining tab 18.The third weld seam section 36 extends along a front edge of the first projection 38, along an inner edge of the first projection 38 running obliquely to the central longitudinal axis, along a boundary edge of the first retaining tab 18 running parallel to the central longitudinal axis of the base body 12, along an inner edge of the second projection 40 of the first retaining tab 18 running obliquely to the central longitudinal axis, and along a lower front edge of the first projection 40. During production of the damper housing 12, the first weld seam section 32 is produced first, then the second weld seam section 34, and finally the third weld seam section 36. The second retaining tab 20, which is mirror-inverted to the first retaining tab 18, is also welded to the base body 12 in a corresponding manner, so that first the first weld seam section, then the second weld seam section, and finally the third weld seam section are produced.

[0040] The shape of the retaining tab 18 with the two projections 38, 40 arranged on the respective outer edge of the retaining tab 18, which each taper, and the straight boundary edge between the projections 38, 40 of the retaining tab 18, which is set back from the front edges of the projections 38, 40, allows a particularly stable and fatigue-resistant connection of the first retaining tab 18 to the base body 12.

[0041] Fig. Figure 4 shows a top view of the damper housing 10. This view shows the first retaining tab 18, the second retaining tab 20, and the U-shaped insert plate 26 arranged between the facing inner sides of the two retaining tabs 18, 20. Fig. 4 shows that the U-shaped insert plate 26 is connected to the base body 12 by means of three spot welds 40. For this purpose, the base of the U-shaped insert plate 26 has three oval through-holes through which the base can then be welded to the base body 12 to thereby form the three spot welds 40.

[0042] Fig. Figure 4 already shows that a bead 42, 44 is provided at the transition from the base to the respective leg of the U-shaped insert plate 26, which will be explained in more detail below. The insert plate 26 stabilizes the retaining tabs 18, 20 and ensures even force transmission into the base body 12 of the damper housing 10.

[0043] Fig. 5 shows a view of the damper housing 10 from a first end face, in the illustration of the Fig. 3 from the left. The first retaining tab 18, the second retaining tab 20 and the U-shaped insert plate 26 can be seen. In the view of the Fig. 5 the two beads 42, 44 on the insert plate 26 can be seen.

[0044] Fig. 6 shows a further view of a front side of the damper housing 10, in the view of the Fig. 3 from the right.

[0045] Fig. 7 shows sections of the base body 12 and the first retaining tab 18 from the side, where Fig. 7 serves to clarify the order in which the individual sections of the weld seam 30 are welded. The weld seam 30 connects the first retaining tab 18 to the base body 12.

[0046] As already explained, the first weld seam section 32 is welded first, which runs along the outer side edge of the first projection 38 up to the Fig. 7 lower front end of the projection 38.

[0047] The second weld seam section 34 is then welded, which extends along the outer edge of the second projection 40 of the first retaining tab 14 up to the Fig. 7, the front end of the second projection 40 located at the bottom. The first weld seam section 32 and the second weld seam section 34 end halfway through a rounded portion at the transition between the respective outer side edge of the projections 38, 40 and the front edge of the projections 38, 40.

[0048] The third weld section 36 is now in Fig. 7 from right to left. The third weld section 36 thus begins at the end of the first weld section 32. The material in the area of ​​the end of the first weld section 32 can therefore already cool down before the third weld section 36 is started at the end of the first weld section 32. The third weld section 36 then extends along the Fig. 7 lower front edge of the first projection 38 of the first retaining tab 18, along the inner side edge of the first projection 38, which is inclined to a central longitudinal axis of the base body 12 in Fig. 7 upwards, then the third weld section 36 is further welded along the boundary edge of the first retaining tab 18, which connects the two inner edges of the projections 38, 40, then the third weld runs along the inner side edge of the second projection 40 of the first retaining tab 18, in Fig. 7 diagonally downwards and then along the Fig. 7 lower front edge of the second projection 40 of the first retaining tab 14 to the end of the second weld seam section 34. When the third weld seam section 36 ends at the end of the second weld seam section 34, the material of the weld seam 30 in the second weld seam section 34, the first retaining tab 18, and the base body 12 has already cooled sufficiently that the attachment of the third weld seam section 36 does not lead to excessive heating and possible structural changes in the material of the first retaining tab 18 and the base body 12. The third weld seam section 36 is attached to the end of the first weld seam section 32 without any gap and ends without any gap at the end of the second weld seam section 34.By cleverly dividing the weld seam 30 into several sections 32, 34, 36 according to the invention, a high-strength and fatigue-resistant welded connection can be achieved between the first retaining tab 18 and the base body 12. Within the scope of the invention, the third weld seam section 36 can also be welded in the opposite direction.

[0049] The third weld section 36 is welded continuously and without any settling. The first weld section 32 and the second weld section 34 are also welded continuously and without any settling.

[0050] Fig. Figure 8 shows the base body 12 with the second retaining tab 20 in a side view. The view goes into Fig. 8 onto the second retaining tab 20, in Fig. 4 this would be a viewing direction in the drawing plane from top to bottom.

[0051] The second retaining tab 20 is also connected to the base body 12 by means of a weld seam 50. A first weld seam section 52 runs along the outer side edge of a first projection 58 of the second retaining tab 20. A second weld seam section 54 runs along the outer side edge of a second projection 60 of the second retaining tab 20. The first weld seam section 52 and the second weld seam section 54 run perpendicular to a central longitudinal axis of the base body 12. A third weld seam section 56 begins at the end of the second weld seam section 54. If necessary, a waiting time must be taken into account here until the end of the second weld seam section 54 has cooled sufficiently and the third weld seam section 56 can be started without excessively heating the material of the second retaining tab 20, the base body 12 and the second weld seam section 54, so that no significant structural change occurs.During the manufacture of the damper housing 12, the first weld section 52 is produced first, then the second weld section 54 and finally the third weld section 56.

[0052] In principle, within the scope of the invention, the third weld section can also be welded starting from the end of the first weld section 52, i.e., in the opposite direction, which is within the scope of the invention. However, most workers are right-handed, so the direction of production of the third weld section 56 is determined for ergonomic reasons.

[0053] The third weld section 56 runs along the Fig. 8 lower front edge of the second projection 60, along the inner side edge of the second projection 60 of the second retaining tab 20, in Fig. 8 obliquely upwards, along the boundary edge of the second retaining tab 20, which connects the two inner sides of the projections 58, 60, along the inner side edge of the first projection 58 of the second retaining tab 20, in Fig. 8 diagonally downwards, and along the front edge of the first projection 58 of the second retaining tab 20 to the end of the first weld seam section 52. As with the first retaining tab 18 and the first weld seam 30, the first weld seam section 52 and the second weld seam section 54 each end halfway between the outer edge of the respective projection 58, 60 and the front edge of the respective projection 58, 60. The third weld seam section 56 is attached without a gap to the end of the second weld seam section 54 and ends without a gap at the end of the first weld seam section 52. As explained, the third weld seam section 56 can also be produced in the opposite direction, i.e. from the end of the first weld seam section 52 to the end of the second weld seam section 54.

[0054] The third weld section 56 is welded continuously and without any setback. The first weld section 52 and the second weld section 54 are also welded continuously and without any setback.

[0055] Fig. Figure 9 shows the first retaining tab 18 in a side view. The first retaining tab 18 has a flat section 62 and two curved sections 64, 66, see also Fig. 1 and the Fig. 5 and Fig. 6. The curved section 66 is bent according to the curvature of the outer circumference of the base body 12 and is located, see again Fig. 1 and the Fig. 5 and Fig. 6, flat against the outer circumference of the base body 12. The also curved section 64 is curved in the opposite direction to the section 66 and is intended as a transition section between the curved section 66 and the flat section 62. The transition section 64 is also located, see again Fig. 1 and the Fig. 5 and Fig. 6, partially on the outer circumference of the base body 12. The first weld seam section 32 for connecting the first retaining tab 18 to the base body 12 begins, see Fig. 7, approximately halfway through the transition section 64. The second weld section 34 begins in the same way, see Fig. 7, also approximately halfway through the transition section 64. The two weld seam sections 32, 34 begin at the point in the transition section 64 where the first retaining tab begins to move away from the outer circumference of the base body 12. Consequently, the weld seam 30 is only applied in the sections where the retaining tab 18 rests flat against the outer circumference of the base body 12. This also applies to the connection of the second retaining tab 20 to the base body 12.

[0056] The curved section 66 has a rectangular base section 68, which partially forms the boundary edge 70 of the first retaining tab 18, which extends between the inner side edges of the first projection 38 and the second projection 40 of the first retaining tab 18.

[0057] Fig. 10 shows the first retaining tab 18 in a view obliquely from above.

[0058] As already apparent from the above explanations, the second retaining tab 20 is designed as a mirror image of the first retaining tab 18.

[0059] Fig. 11 shows the first retaining tab 18 and the second retaining tab 20. This illustration also shows that the two retaining tabs 18, 20 are mirror images of each other, see also Fig. 1. In Fig. 1 the flat section 62, the curved transition section 64 and the curved section 66 of the first retaining tab 18.

[0060] Fig. 12 shows a view of the U-shaped insert plate 26, cf. Fig. 1, diagonally from above. Through-holes are arranged in each of the two legs of the U-shaped insert plate for inserting bolts and for arranging and clamping a wheel carrier between the legs of the U-shaped insert plate 26. At the transition between the base and the legs of the U-shaped insert plate, a bead 42 or 44 is arranged on each side. Sections of one of the oval through-holes 40 can be seen in the base, through which the base is then welded to the base body 12.

[0061] Fig. 13 shows a view of the U-shaped insert plate 26 from the front.

[0062] Fig. 14 shows a side view of the U-shaped insert plate 26.

[0063] Fig.Figure 15 shows a top view of the U-shaped insert plate 26. The two beads 42, 44 at the transition between the base and the right leg and the left leg, respectively, can be seen. The beads 42, 44 are pressed in from the outside of the U-shaped insert plate 26 and thereby stabilize the connection between the base and the respective leg. Also visible are the three oval through-openings 40 in the base. Within the scope of the invention, the shape of the through-openings 40, as well as the number of through-openings, can of course be modified.

Claims

[1] Damper housing for a shock absorber for a motor vehicle, comprising a base body that is at least partially cylindrical and comprising two retaining lugs attached to the base body, in particular for attaching a wheel body to the damper housing, wherein each of the retaining lugs bears against the outer circumference of the base body over a section of the outer circumference, wherein each retaining lug has a retaining section that projects from the base body, and wherein the two retaining lugs are designed as separate components and each retaining lug is welded to the base body by means of at least one weld, wherein the sections of each retaining lug bearing against the base body have at least two projections and a limiting edge of the retaining lug connecting the projections,wherein at least one weld seam extends at least along the side edges of the projections and along the boundary edge between the projections and wherein a U-shaped insert plate is provided between the sections of the retaining tabs projecting from the base body of the damper housing. [2] Damper housing according to claim 1, wherein the projections have a shape tapering away from the boundary edge. [3] Damper housing according to claim 1 or 2, wherein a respective outer side edge of the projections extends perpendicular to a central longitudinal axis of the base body of the damper housing. [4] Damper housing according to claim 1, 2 or 3, wherein a respective inner side edge of the projections extends obliquely to the boundary edge and obliquely to a central longitudinal axis of the base body of the damper housing. [5] Damper housing according to one of the preceding claims, wherein the limiting edge extends between the inner side edges of the projections and is arranged parallel to a central longitudinal axis of the base body of the damper housing. [6] Damper housing according to one of the preceding claims, wherein the sections of each retaining tab abutting the base body have a rectangular base section and wherein the projections extend from the base section and the limiting edge defines the base section. [7] Damper housing according to one of the preceding claims, wherein the U-shaped insert plate has a base and two legs extending from the base and wherein the base rests against the base body and is welded to the base body in the area of ​​the base. [8] Damper housing according to at least one of the preceding claims, wherein the sections of the retaining tabs projecting from the base body are not arranged parallel to each other, but the distance between the retaining tabs increases in a direction away from the base body. [9] Damper housing according to at least one of the preceding claims, wherein the weld between the base body and the respective retaining tab is produced in several sections, namely first in a first weld section along the outer side edge of the first projection, in a second weld section along the outer side edge of the second projection, and in a third weld section along the front edge of the first or second projection, along the inner side edge of the first or second projection, along the boundary edge between the first and the second projection, along the inner side edge of the second or first projection and along the front edge of the second or first projection. [10] Damper housing according to claim 9, wherein the third weld section is welded continuously. [11] Damper housing according to claim 10, wherein the third weld section is welded continuously and without stepping. [12] Method for manufacturing a damper housing for a shock absorber according to one of the preceding claims, wherein each of the retaining tabs is connected to the base body of the damper housing by means of at least one weld and wherein the weld is produced in several weld sections, namely first in a first weld section along the outer side edge of the first or second projection, then in a second weld section along the outer side edge of the second or first projection, and in a third weld section along the leading edge of the first or second projection, along the inner side edge of the first or second projection, along the boundary edge between the first and the second projection, along the inner side edge of the second or first projection and along the leading edge of the second or first projection. [13] Method according to claim 12, wherein first the first weld section is made on the first retaining tab along the outer side edge of the first projection of the first retaining tab, then the second weld section is made on the first retaining tab along the outer side edge of the second projection of the first retaining tab, then the first weld section is made on the second retaining tab along the outer side edge of the first projection of the second retaining tab, then the second weld section is made on the second retaining tab along the outer side edge of the second projection of the second retaining tab, then the third weld section is made on the first retaining tab along the leading edge of the first or second projection of the first retaining tab, along the inner side edge of the first or second projection of the first retaining tab.The second projection of the first retaining tab, along the boundary edge between the projections of the first retaining tab, along the inner side edge of the second or first projection of the first retaining tab and along the leading edge of the second or first projection of the first retaining tab, and then the third weld section is produced on the second retaining tab along the leading edge of the first or second projection of the second retaining tab, along the inner side edge of the first or second projection of the second retaining tab, along the boundary edge between the projections of the second retaining tab, along the inner side edge of the second or first projection of the second retaining tab and along the leading edge of the second or first projection of the second retaining tab. [14] Method for manufacturing a damper housing for a strut according to claim 12 or 13, wherein the third weld section is welded continuously. [15] Method for manufacturing a damper housing for a strut according to claim 12, 13 or 14, wherein the third weld section is welded continuously and without stopping. [16] Method for manufacturing a damper housing for a shock absorber according to claim 12, 13, 14 or 15, wherein the arrangement of a U-shaped insert plate between the sections of the retaining tabs projecting from the base body of the damper housing is provided. [17] Method for manufacturing a damper housing for a strut according to claim 16, wherein the U-shaped insert plate has a base and two legs extending from the base and wherein the base rests against the base body and wherein the U-shaped insert plate is welded to the base body in the area of ​​the base. [18] Method for manufacturing a damper housing according to claim 16 or 17, wherein the u-shaped insert plate is connected to a retaining tab by means of at least one weld point.

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