Subframe for a motor vehicle

Abstract

The invention relates to a subframe for a motor vehicle, comprising a frame body (2) consisting of shell components (5, 6) and at least one mounting sleeve (12, 13). Each mounting sleeve (12, 13) comprises a sleeve body (16) having a longitudinal through-hole (17) and a sleeve head (18, 19) having a through-hole (20). According to the invention, the sleeve head (18, 19) is a cold-extruded part, and a through-opening (20) in the sleeve head (18, 19) is produced in the sleeve head (18, 19) during cold extrusion. The sleeve heads (18, 19) are positioned on the sleeve body (16) on the end face.

Description

Technical Field

[0001] The invention relates to a subframe for a motor vehicle. The subframe comprises a frame body and at least one mounting sleeve. The mounting sleeve comprises a sleeve body with a longitudinal through portion and a sleeve head with a through opening. Background Art

[0002] Subframes for motor vehicles, also known as axle supports, power unit supports or engine supports, are widely known in different embodiments and are screwed to the vehicle body via connection points. Usually, the subframe has a frame body, which forms an internally open rectangle or trapezoid, and the frame body is usually welded from two or more sheet metal parts to form a hollow profile. The joint points of the wheel suspension on the vehicle body are fixed to the subframe. If the subframe is to assume other functions, the frame body has additional vehicle body parts or mounting parts. The subframe can be rigidly screwed to the vehicle body or connected to the vehicle body via elastic supports.

[0003] Prior art EP 2 902 303 B1 32 relates to a subframe for a motor vehicle. The subframe has two shell elements connected to each other and at least one body connection sleeve for inserting bolts. The body connection sleeve is a mounting sleeve, which includes a sleeve body with a disc-shaped sleeve head.

[0004] Prior art DE 10 2015 208 898 B3 relates to a fastening system for connecting an axle frame to a body of a motor vehicle, comprising a mounting sleeve which can be fastened on or in the frame body and connects two wall sections of the frame body which are arranged at a distance from each other.

[0005] DE 10 2016 121 756 B3 discloses a two-part body connecting sleeve, which comprises a spacing sleeve and a separate body connecting sleeve.

[0006] CN 217598682 U discloses a subframe for a motor vehicle, which has a frame body and a mounting sleeve. The mounting sleeve is implemented integrally with the sleeve body and the sleeve head. The column structure of the mounting sleeve is formed by cold heading technology. Summary of the invention

[0007] Starting from this prior art, the object of the present invention is to provide a subframe for a motor vehicle, which subframe has improved connection points or articulation points and an improved mounting sleeve in terms of production technology and component technology.

[0008] According to the invention, this object is achieved by a subframe according to claim 1 .

[0009] Advantageous embodiments and developments of the motor vehicle subframe according to the invention are the subject matter of the dependent claims.

[0010] The configurations and developments of the features of the subframe described alone or in combination are technically advantageous for the embodiment of the invention, as can also be seen from the description and the drawings.

[0011] The motor vehicle subframe according to the invention comprises a frame body and at least one mounting sleeve. The frame body is preferably formed by shell components. The shell components are formed by metal sheets and are assembled to form the frame body. The frame body has a cavity section, which has two walls spaced apart from each other. The mounting sleeve extends between two openings arranged in the walls of the frame body, which are arranged coaxially opposite to each other and have a common central longitudinal axis.

[0012] The mounting sleeve comprises a sleeve body with a longitudinal through-hole and a sleeve head with a through-opening. They are independent components constituting the mounting sleeve. The through-opening in the sleeve head continues the longitudinal through-hole in the sleeve body. The sleeve body and the sleeve head have a common central longitudinal axis.

[0013] The sleeve head and the sleeve body are manufactured separately from each other and put together to form the mounting sleeve, and the sleeve head is positioned on the sleeve body at the end side. The sleeve head abuts against the end side of the sleeve body.

[0014] The sleeve head is a cold extrusion part, and the through opening in the sleeve head is produced in the sleeve head during cold extrusion. The sleeve head produced separately by cold extrusion is positioned on the sleeve body at the end side at the end of the sleeve body.

[0015] The mounting sleeve according to the invention is advantageous in terms of production technology and component technology and can be advantageously designed for a subframe of a motor vehicle in terms of its connection points or articulation points and integrated into the chassis system of the motor vehicle. By designing the mounting sleeve, the subframe can be adapted to different motor vehicle product lines in an efficient manner. These mounting sleeves are particularly advantageous because a sleeve body of complex shape and material is equipped with a sleeve head adapted to the intended application.

[0016] The mounting sleeve extends between the two walls of the frame body and the opening provided in the wall. Here, the mounting sleeve can be fixed in the opening. The mounting sleeve can also contact the inner surface of the wall of the frame body with the sleeve body and surround the opening in the wall of the frame body. In the contact area with the wall, the mounting sleeve and the frame body are connected in a material-locking manner.

[0017] The sleeve head is made by cold extrusion, i.e. cold integral forming. Usually, cold integral forming is also understood as cold extrusion. The forming process takes place at room temperature. The forming die does not undergo active heating, and the temperature of the material is kept below the recrystallization temperature. The solid blank is placed under high pressure during cold extrusion, so that the material begins to flow. Through cold extrusion, the sleeve head obtains its outer contour. During cold extrusion, a through opening is made in the sleeve head. The manufacture of the sleeve head or the forming of the sleeve head itself can be carried out in one or more process steps. After the cold extrusion process, the sleeve head can have its final geometric structure. Depending on the design of the sleeve head, only a small amount of reprocessing of the sleeve head is required after cold extrusion.

[0018] The sleeve head has a through opening extending in the longitudinal direction of the mounting sleeve and communicating with a longitudinal through portion in the sleeve body.

[0019] Depending on strength or load requirements, the sleeve body can have different wall thicknesses.

[0020] The mounting sleeve may include a sleeve body with a longitudinal slot.

[0021] A practically advantageous embodiment provides that the mounting sleeve comprises a sleeve body with a longitudinal slot and a cold-extruded sleeve head which is integrally joined to the sleeve body at the end face.

[0022] The sleeve body can be embodied seamlessly.

[0023] The sleeve body may be a tube having a longitudinal seam weld.

[0024] The sleeve body may be an extruded tube.

[0025] The sleeve head and the sleeve body can be joined to one another in a form-fitting and / or force-fitting and / or materially bonding manner.

[0026] Depending on the design, it may be sufficient to place the sleeve head on the sleeve body. The two components are fixed to each other by means of mounting bolts guided through the mounting sleeve in the frame body of the auxiliary frame.

[0027] The sleeve head and the sleeve body can be mechanically connected by a press connection or a press fit.

[0028] An alternative aspect provides that the sleeve head and the sleeve body are connected to each other in a form-fitting manner. Here, the engagement surfaces of the sleeve body and the sleeve head are geometrically coordinated with each other so that the form-fit is achieved by engaging (engaging into each other) at least one form-fitting element at the sleeve head and at the end of the sleeve body end side.

[0029] An advantageous embodiment provides that the sleeve body is roll-formed, rolled or produced by UO molding.

[0030] The sleeve element can be produced by roll forming. The raw material can be a flat metal strip made of high-strength steel or stainless steel. In this case, a long profile in the form of a slotted tube can be produced, from which the sleeve body of the required length is cut. Of course, it is also possible to form the sleeve body from a single prefabricated sheet metal blank.

[0031] The sleeve body can be made by UO molding of a sheet metal blank. The sheet metal blank is prefabricated and corresponds to the unfolded sleeve body. It is also possible to manufacture long profiles in the form of slotted tubes by UO molding, from which the sleeve body of the required length is cut out.

[0032] The sleeve head is positioned on and, in particular, engages on the end side of the sleeve body.

[0033] The sleeve body may have a longitudinal slit. The longitudinal slit may extend in a straight line, or may extend in a curved or curvilinear manner. Preferably, the longitudinal slit is a straight line, which may also extend obliquely relative to the central longitudinal axis.

[0034] The sleeve body has longitudinal edges that are opposite to each other along the longitudinal gap. These longitudinal edges can have a distance from each other or abut against each other without gap.

[0035] A butt seam is formed between the longitudinal edges.

[0036] Form-fit elements can be formed on the longitudinal edges of the sleeve body extending along the longitudinal slot. These form-fit elements are preferably designed to be complementary to each other and engage with each other. The longitudinal edges can mesh with each other.

[0037] The longitudinal edges of the sleeve body can be joined to each other completely or at least partially. The longitudinal edges along the longitudinal slit of the sleeve body can be joined in a sealing manner by means of welding material.

[0038] The sleeve head can have a geometry that is coordinated with its connection function. Complex sleeve head geometries are possible. The sleeve head can be reprocessed after being manufactured using cold pressing technology. The sleeve head can also be heat treated.

[0039] According to the present invention, a particular advantage is that a sleeve body with a complex shape can be manufactured for fixing a component on a subframe or for fixing a subframe. In particular, a sleeve body of a required length can be provided in a coordinated manner according to the purpose of use or the purpose of installation.

[0040] In one embodiment, the sleeve head has a disk element that abuts against the sleeve body at the end and has at least one positioning element on the sleeve body side, which extends into the sleeve body. This is beneficial for the engagement of the sleeve head with the sleeve body and for the stability of the mounting sleeve.

[0041] The sleeve head can also have at least one positioning element on the sleeve body side, that is, on the side facing the sleeve body, which is externally abutted against the end section of the end side of the sleeve body. In particular, the positioning element on the sleeve body side partially or circumferentially surrounds (encloses and engages) the end section of the sleeve body on the outside.

[0042] Furthermore, the sleeve head advantageously has a mounting section on its side facing away from the sleeve body. The mounting section can be arranged on the outer surface of the sleeve head. The mounting section can also be formed on the inner side of the sleeve head, in particular at the central through-opening of the sleeve head. The mounting section can be, for example, an internal thread section in the sleeve head.

[0043] It is particularly advantageous to use differently configured mounting sleeves in the subframe according to the invention. These mounting sleeves can differ in the shape and geometry of the sleeve head, the length of the sleeve body and the position of the sleeve head relative to the frame body of the subframe. The sleeve head can be positioned relative to the outer surface of the frame body. The sleeve head can be placed on the wall above the opening in the wall of the frame body. It is also possible that the sleeve head rests on the inside against the wall of the frame body. Furthermore, the sleeve body can protrude relative to the wall of the frame body on one or both sides or rest on the inside against the wall of the frame body.

[0044] The sleeve body of the mounting sleeve can protrude through an opening in the wall of the frame body, and the sleeve head of the mounting sleeve is arranged at a distance from the outer surface of the frame body. The length of the sleeve body is greater than the distance between the walls of the frame body in the cavity section in which the mounting sleeve is arranged between the openings in the walls. The mounting sleeve protrudes relative to the frame body with its longitudinal section on the sleeve head side.

[0045] Such a mounting sleeve is used in particular for connecting elastic bearing components, for example as a body-side articulation point for a wheel suspension. The mounting sleeve is a component of a body connection device of a subframe and a fastening system for connecting the subframe to a motor vehicle body.

[0046] The fastening system can be adapted to vehicle bodies of different construction series by means of the length of the mounting sleeve and the distance between the frame body and the sleeve head (ie, the longitudinal section of the mounting sleeve protruding from the frame body).

[0047] Furthermore, the mounting sleeve can have a sleeve head which is arranged in an opening in the wall of the frame body. The sleeve head can end flush with the outer surface of the frame body or protrude with its end side to a limited extent beyond the outer surface of the wall of the frame body.

[0048] In another embodiment of the mounting sleeve, the sleeve head can rest with a contact surface on the sleeve body side against the frame body.

[0049] The sleeve body can protrude with the end section remote from the sleeve head through the opening in the wall of the frame body. This helps to increase the stability of the connection, the accessibility of the mounting sleeve and to expand the range of use of the mounting sleeve and its function in the subframe.

[0050] A further advantageous embodiment provides that the sleeve body contacts the inner surface of the wall of the frame body with its end facing away from the sleeve head and thereby surrounds the opening in the wall of the frame body.

[0051] The opening in the wall of the frame body can be arranged in a pot-shaped stamping.Inside, the sleeve body stands on the inner surface of the wall surrounding the opening with the end and engages with the frame body.

[0052] In addition to the mounting sleeve according to the invention, a further supporting sleeve can be arranged inside the frame body or in the hollow section of the frame body, which supporting sleeve extends between two openings arranged opposite each other and coaxially in the wall of the frame body.

[0053] The sleeve head can have a friction structure. The friction on the sleeve body is increased by the friction structure, in particular in the area around the through-opening.

[0054] The friction structure can also be arranged on the rear side or on the side of the sleeve head facing the sleeve body.

[0055] In particular, the friction structure is arranged on the end side of the sleeve head. The friction on the end side of the sleeve head is increased by the friction structure, and the forces generated by the threaded element are efficiently transmitted to the surface in the area of ​​the friction structure. In this way, the threaded element is better held and the connection can transmit greater transverse forces.

[0056] In particular, the friction structure at least partially surrounds the through-opening in the sleeve body.

[0057] The friction structure is preferably produced when the sleeve head is manufactured by cold extrusion technology. If necessary, the three-dimensional geometric structure of the friction structure is finally formed by further processing.

[0058] The friction structure can be composed of one or more friction elements, which extend around the through-opening in the form of a ring or a circle. In addition, the friction structure can be composed of rib-shaped or point-shaped friction elements.

[0059] One embodiment which is advantageous in practice provides that the friction structure is formed by laser dimplings or contains laser dimplings. Particularly preferably, the cold-extruded sleeve head is provided with laser dimplings.

[0060] Another advantageous embodiment provides that the sleeve head and the sleeve body are made of different materials. These materials and their material properties are matched to the application within the subframe and the connection point to be realized by means of the mounting sleeve.

[0061] A further embodiment provides that the sleeve body and / or the sleeve head are hardened and / or tempered.

[0062] The hardness of the sleeve head in particular can be increased by a hardening process. By combining heat treatment during the quenching and tempering process, the sleeve body and in particular the sleeve head can have a higher strength while having high toughness. During the quenching and tempering process, the component is hardened, quenched and then tempered. During the quenching and tempering process, an increase in hardness is achieved while achieving high toughness. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings.

[0064] Figure 1 A perspective view showing a subframe according to the present invention;

[0065] Figure 2 Show according to Figure 1 A cross-sectional view of a subframe shown in FIG.

[0066] Figure 3 shows a section through the frame body of the subframe in the region of a first type of mounting sleeve;

[0067] Figure 4 Show according to Figure 1 Another cross-sectional view of the subframe shown in FIG.

[0068] Figure 5 shows a section through the frame body of the subframe in the region of a second type of mounting sleeve;

[0069] Figure 6 A perspective view showing a mounting sleeve;

[0070] Figure 7 Shown by Figure 6 A vertical longitudinal section of the mounting sleeve;

[0071] Figure 8 A view showing the mounting sleeve installed in the frame body of the subframe;

[0072] Fig. 9 A vertical longitudinal section view showing another embodiment of a mounting sleeve;

[0073] Fig.10 A cross-sectional view through another embodiment of a subframe is shown together with a section in the region of a mounting sleeve, and

[0074] Figures 11 to 24 Different embodiments of the sleeve head are shown in two perspective views, respectively. DETAILED DESCRIPTION

[0075] exist Figures 1 to 24 1 and 2 , the same reference numerals are used to denote components and component assemblies that are the same or correspond to each other, even if repeated descriptions are omitted for simplicity.

[0076] Figure 1 A perspective view of a subframe 1 for a motor vehicle is shown. Fig.10 A detail of a subframe 1 according to another embodiment is shown.

[0077] The subframe 1 has a frame body 2, which is composed of frame profiles 3 and 4. The frame profiles 3 and 4 are longitudinal beam profiles and transverse beam profiles. The basic shape of the frame body 2 is a rectangular shape with an open interior.

[0078] The frame profiles 3, 4 are formed by sheet metal shell components 5, 6. Furthermore, further mounting parts 7 and body parts 8 are fastened to the frame body 2 for mounting various chassis components or drive components of the motor vehicle.

[0079] The frame body 2 of the subframe 1 can be designed as a hollow profile as a whole, in particular the frame profiles 3, 4 (i.e. in particular the longitudinal beams and the cross beams) are designed as hollow profiles. The frame profiles 3, 4 have a cavity section 9, which has two walls 10, 11 spaced apart from each other. Mounting sleeves 12, 13 are provided for connecting the subframe to the vehicle body and for articulating chassis components or drive components of the motor vehicle. The mounting sleeves 12, 13 extend between two openings 14, 15 provided in the walls 10, 11 of the frame body 2. The openings 14, 15 are coaxially opposite to each other and have a common central longitudinal axis.

[0080] The first type of mounting sleeve 12 and the second type of mounting sleeve 13 are mounted in the subframe 1 .

[0081] The first type of mounting sleeve 12 is particularly Figure 2 and 3 as well as Figures 6 to 8 Visible in. Figure 4 , 5 as well as Fig. 9 and 10 The illustration of shows a second type of mounting sleeve 13 .

[0082] The mounting sleeve 12, 13 has a sleeve body 16 and a cold-formed sleeve head 18, 19. Each sleeve head 18, 19 has a through opening 20. The through opening 20 is produced when the cold-formed sleeve head 18, 19 is positioned on the end side 21 of the sleeve body 16.

[0083] The sleeve body 16 and the sleeve heads 18, 19 are components manufactured separately from each other and are assembled to form the mounting sleeves 12, 13. The sleeve heads 18, 19 can be engaged with the sleeve body 16 in a form-fitting and / or force-fitting (cold-locking) manner.

[0084] In the case of a positive connection, the geometries of the engagement surfaces of the sleeve body 16 and the sleeve heads 18 , 19 are coordinated with one another so that a positive fit is achieved by mutual engagement of at least one positive locking element at the sleeve heads 18 , 19 and at the end faces of the sleeve body 16 .

[0085] The friction-locking connection can be achieved by a press connection or compression fit of the sleeve head 18 , 19 and the sleeve body 16 .

[0086] The sleeve body 16 and the sleeve heads 18 , 19 can consist of different materials, in particular steel.

[0087] The first type of mounting sleeve 12 and the second type of mounting sleeve 13 differ in the configuration of the sleeve head 18 or 19 or the position of the sleeve head 18 , 19 relative to the outer surface of the wall 10 , 11 of the frame body 2 .

[0088] The sleeve head 18, 19 has a disk element 22 which bears against the sleeve body 16 at the end and has a positioning element 23 on the sleeve body side which projects into the sleeve body 16. This is possible both for the sleeve head 18 of the first type of mounting sleeve 12 and for the sleeve head 19 of the mounting sleeve 13.

[0089] On the end side 24 facing away from the sleeve body 16 , the sleeve head 18 has a mounting section 25 .

[0090] In the case of the sleeve head 18 of the first type of mounting sleeve 12, the mounting section 25 is designed as a shaped portion 26 with a rounded outer surface protruding from the disk element 22. The mounting section 25 of the sleeve head 18 of the first type of mounting sleeve 12 is designed in the form of a spherical segment.

[0091] Both the sleeve head 18 of the first type of mounting sleeve 12 and the sleeve head 19 of the second type of mounting sleeve 13 have a central through-opening 20. In the through-opening 20, a mounting section in the form of an internal thread can be arranged.

[0092] The sleeve body 16 of the first type of mounting sleeve 12 and the sleeve body 16 of the second type of mounting sleeve 13 extend between the upper wall 10 and the lower wall 11 in the cavity section 9 of the frame body 2 of the subframe 1. Assembly elements, in particular bolts, can be guided through the longitudinal through-openings 17 of the sleeve bodies 16, 17. The longitudinal through-openings 17 in the sleeve body 16 extend into the through-openings 20 of the sleeve heads 18, 19 with the same diameter or with a stepped smaller diameter.

[0093] In particular, from Figures 1 to 3 , it can be seen that the sleeve body 16 of the first type of mounting sleeve 12 protrudes through the upper opening 14 in the wall 10 of the frame body 2, and the sleeve head 18 of the mounting sleeve 12 is arranged at a distance a from the opening 14 and the adjacent outer surface 2 of the frame body 2. Therefore, the mounting sleeve 12 protrudes with an upper longitudinal section 28 relative to the frame body 2 and its upper wall 10.

[0094] exist Figure 8 In the variant embodiment shown, a first type of mounting sleeve 12 is placed on the upper wall 10 of the frame body 2 by means of a disc element 22. The sleeve body 16 ends flush with the outer surface of the upper wall 10. The sleeve head 18 communicates with the opening 14 of the upper wall 10. The sleeve body 16 protrudes through the opening 15 in the lower wall 11 of the frame body 2. The first type of mounting sleeve 12 engages with the upper wall 10 and the lower wall 11.

[0095] Figure 4 , 5 10 shows that the sleeve head 19 of the second type of mounting sleeve 13 is arranged in the opening 14 of the upper wall 10 of the frame body 2. The mounting sleeve 13 engages with the frame body 2 in the region of the opening 14 and the sleeve head 19.

[0096] The sleeve body 16 contacts the inner surface 30 of the lower wall 11 of the frame body 2 with the lower end 29 facing away from the sleeve head 18, 19. Here, the sleeve body 16 coaxially surrounds the lower opening 15 of the frame body 2. The sleeve body 16 stands on the inner surface 30 with the end 29 and engages with the frame body 2.

[0097] exist Fig.10 In the subframe 1 shown, the sleeve body 16 projects with the lower end section 31 facing away from the sleeve head 19 through the opening 15 of the lower wall 11 of the frame body 2 and there projects relative to the lower wall 11 of the frame body 2. The sleeve body 16 also engages with the frame body 2 in the region of the opening 15 in the lower wall 11.

[0098] In the region of the lower opening 15 , the lower wall 11 of the frame body 2 has a pot-shaped embossing 32 . The embossing 32 is formed inwardly into the hollow space section 9 of the frame body 2 .

[0099] exist Figures 11 to 241 and 2 show different embodiments of the sleeve heads 18 and 19 in two perspective views. The sleeve heads 18 and 19 can be heat treated or tempered and / or hardened.

[0100] Figures 11 to 16 The sleeve head 18 is shown in each case with a disk element 22 and an end-side mounting section 25 . The mounting section 25 is designed as a cylindrical socket 33 that projects relative to the disk element 22 .

[0101] In accordance with Figures 13 to 16 In the embodiment of the sleeve head 18, the sleeve body side has a positioning element 23 on its lower side 34 facing the sleeve body 16. The positioning element 23 can be implemented as a protrusion 35, such as Fig.13 and 14 Furthermore, the further positioning element 23 can be formed by a ring 36 extending concentrically around the projection 35 on the underside 34, as shown in FIG. Fig.15 and 16 The positioning element 23 or the projection 35 and the ring 36 protrude relative to the underside 34 of the sleeve head 18 or its disk element 22. The ring 36 comprises an end section 37 ( Figure 7 and Fig. 9 35 and the ring 36).

[0102] according to Fig.12 , 14 The sleeve head 18 of the exemplary embodiment of 16 has a friction structure 39 on its end face 24. The friction structure 39 is formed by friction elements 40 which protrude on the upper side on the end face 24 of the sleeve head 18. The friction elements 40 are designed as ribs extending radially outward around the mounting section 25.

[0103] Figures 17 to 22 A sleeve head 19 with a disk element 22 is shown. Each sleeve head 19 has a through opening 20. Figures 19 to 22 The embodiment of the sleeve head 19 shown in the figure has a positioning element 23 on the bottom side in the form of a projection 35 and a ring 36. In this regard, reference is made to the above-described embodiments.

[0104] according to Fig.18 , 20 The embodiment of the sleeve head 19 according to FIGS. 2 and 22 has, on its end face 24 , a friction structure 39 with friction elements 40 in the form of ribs, which are arranged circumferentially around the through-opening 20 and extend radially outwards from the through-opening 20 .

[0105] Fig.23 and 24 The sleeve head 19 is shown again, which has a positioning element 23 in the form of a projection 35 on the underside 34 of the sleeve head 19. Fig.24 In the embodiment of the sleeve head 19 shown, a friction structure 39 is provided on the end face 24. The friction structure 39 is formed by friction elements 40 in the form of ribs which radially surround the through-opening 20, are arranged offset on a pitch circle and extend outwards.

[0106] Reference numerals list

[0107] 1 frame

[0108] 2 Frame

[0109] 3 Frame profiles

[0110] 4 Frame profiles

[0111] 5 Shell components

[0112] 6 Shell components

[0113] 7 Installing the components

[0114] 8 Body parts

[0115] 9 Cavity Section

[0116] 10 walls

[0117] 11 walls

[0118] 12 Type 1 mounting sleeve

[0119] 13 Second type of mounting sleeve

[0120] 14 Opening

[0121] 15 Opening

[0122] 16 Sleeve body

[0123] 17 longitudinal penetration portion

[0124] 18 socket head

[0125] 19 Socket head

[0126] 20Through opening

[0127] 2116 end side

[0128] 22 tray components

[0129] 23 Positioning elements

[0130] 2418, 19 end side

[0131] 25 Installation Section

[0132] 26 Forming Department

[0133] 27 External surface

[0134] 28 longitudinal sections

[0135] The lower end of 2916

[0136] 30 Inner surface

[0137] 31 End section

[0138] 32 Stamping Department

[0139] 33 Takeover

[0140] 3418, 19 lower side

[0141] 35 bulge

[0142] 36 rings

[0143] End section of 3716

[0144] 38 grooves

[0145] 39 Friction structure

[0146] 40 Friction elements

[0147] aDistance

Claims

1. A subframe for a motor vehicle, the subframe comprising a frame body (2) and at least one mounting sleeve (12, 13), the mounting sleeve (12, 13) comprising a sleeve body (16) having a longitudinal through-portion (17) and a sleeve head (18, 19) having a through-opening (20), characterized in that: The sleeve head (18, 19) is a cold extruded part, the through opening (20) is produced in the sleeve head (18, 19) during cold extrusion, the sleeve head (18, 19) and the sleeve body (16) are manufactured separately from each other, and the sleeve head (18, 19) is positioned on the sleeve body (16) at the end side, and the sleeve body (16) and the sleeve head (18, 19) are connected in a form-fitting and / or non-positive manner.

2. The subframe according to claim 1, characterized in that: The sleeve head (18, 19) has a disk element (22) which bears against the sleeve body (16) at the end and has at least one positioning element (23) on the sleeve body side which projects into the sleeve body (16) and / or bears against an end section (37) of the sleeve body (16) on the outside.

3. The subframe according to claim 1 or 2, characterized in that: The sleeve head (18, 19) has a mounting section (25) on its end side (24) facing away from the sleeve body (16).

4. The subframe according to any one of claims 1 to 3, characterized in that: The sleeve head (18, 19) has a friction structure (39).

5. The subframe according to claim 4, characterized in that: The friction structure (39) is arranged on the end side (24) of the sleeve head (18, 19).

6. The subframe according to claim 4 or 5, characterized in that: The friction structure (39) at least partially surrounds the through-opening (20).

7. The subframe according to any one of claims 4 to 6, characterized in that: The friction structure (39) is formed by at least one friction element (40), and the friction element (40) is configured in a rib-like or point-like manner.

8. The subframe according to any one of claims 1 to 7, characterized in that: The frame body (2) is composed of shell components (5, 6).

9. The subframe according to any one of claims 1 to 8, characterized in that: The sleeve heads (18, 19) are arranged in the opening (14) of the frame body (2).

10. The subframe according to any one of claims 1 to 8, characterized in that: The sleeve head (18, 19) rests on the frame body (2) with a contact bearing surface on the sleeve body side.

11. The subframe according to any one of claims 1 to 8, characterized in that: The sleeve body (16) protrudes through an opening (14) in a wall (10) of the frame body (2), and the sleeve heads (18, 19) are arranged at a distance (9) from an outer surface (27) of the frame body (2).

12. The subframe according to any one of claims 1 to 11, characterized in that: The sleeve body (18, 19) projects with an end section (31) facing away from the sleeve head (16) through an opening (15) in the wall (11) of the frame body (2).

13. The subframe according to any one of claims 1 to 12, characterized in that: The sleeve body (16) contacts the inner surface (30) of the wall (11) of the frame body (2) with its end (31) facing away from the sleeve head (18, 19) and surrounds the opening (15) in the wall (11) of the frame body (2).

14. The subframe according to any one of claims 1 to 13, characterized in that: The socket head (18, 19) has a threaded section.

15. The subframe according to any one of claims 1 to 14, characterized in that: The sleeve head (18, 19) and the sleeve body (16) are made of different materials.

16. The subframe according to any one of claims 1 to 16, characterized in that: The sleeve body (16) and / or the sleeve head (18, 19) are hardened or tempered.

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