Side member for a rear frame of a vehicle body
View Patent ↗The present invention relates to a side member in shell design for a rear frame of a self-supporting body of a motor vehicle, having a lower shell and an upper shell which are connected to each other in a fixed manner and at least in portions for a closed hollow member, wherein the lower shell is assembled from three shell parts, which in extension direction of the side member are arranged one after the other, wherein a middle shell part arranged between the two other shell parts at least in portions is formed as metal cast component, in particular steel cast component.
1. A side member in shell configuration for a rear frame of a self-supporting body of a motor vehicle, the side member comprising:
a lower shell having three shell parts that, in an extension direction of the side member, are arranged one after the other, wherein a middle shell part of the three shell parts is arranged at least in portions between the other two of the three shell parts and is configured as a metal cast component, wherein the middle shell part comprises: an outer wall portion that includes a shock absorber mounting having a shock absorber recess configured to receive a shock absorber; and
an upper shell connected to the lower shell in a fixed manner and at least in portions forms a closed hollow member with the lower shell.
2. The side member according to claim 1 , wherein the middle shell part is configured as a steel cast component.
3. The side member according to claim 1 , wherein the middle shell part has a maximum wall thickness of about 2.5 mm.
4. The side member according to claim 3 , wherein the middle shell part has the maximum wall thickness in the range of from about 1.5 mm to about 2.5 mm.
5. The side member according to claim 1 , wherein the middle shell part comprises an integrated connecting region for connecting non-body vehicle parts.
6. The side member according to claim 5 , wherein the middle shell part comprises a connecting region for connecting an axle swingarm, wherein the connecting region is configured as a box-shaped hollow profile.
7. The side member according to claim 1 , wherein a front shell part of the three shell parts is arranged at a front of the middle shell part and is formed as a deep-drawn component.
8. The side member according to claim 7 , wherein the front shell part comprises a metal material.
9. The side member according to claim 7 , wherein the front shell part comprises sheet steel having a yield strength in the range of from about 600 to about 800 MPa.
10. The side member according to claim 1 , wherein a rear shell part of the three shell parts is arranged at a rear end of the middle shell part and is configured as a roll-formed component.
11. The side member according to claim 10 , wherein the rear shell part comprises sheet steel having a yield strength of more than about 1,000 MPa.
12. The side member according to claim 1 , wherein the upper shell is configured as a one-piece deep-drawn component.
13. The side member according to claim 12 , wherein the upper shell comprises a hot-formable metal material.
14. The side member according to claim 13 , wherein the upper shell comprises sheet steel having a yield strength of more than about 1,200 MPa.
15. The side member according to claim 12 , wherein the upper shell comprises an insert part for connecting a vehicle seat.
16. The side member according to claim 1 , wherein the upper shell an insert part for connecting a vehicle seat, wherein the upper shell comprises two shell parts which, in the extension direction of the side member, are arranged one after the other, wherein a front shell part of the upper shell at a front end in an installed state comprises the insert part and is configured as a deep-drawn component, and wherein a rear shell part of the upper shell at a rear end in the installed state is configured as a roll-formed component.
17. The side member according to claim 1 , wherein on a lower side of a front shell part of the three shell parts a stiffening profile comprising a hole for an engagement of a tool during an assembly of the self-supporting body of the motor vehicle is attached.
18. A rear frame of a motor vehicle with a self-supporting body, the rear frame having on both sides of a center longitudinal axis a side member comprising:
a lower shell having three shell parts that, in an extension direction of the side member, are arranged one after the other, wherein a middle shell part of the three shell parts is arranged at least in portions between the other two of the three shell parts and is configured as a metal cast component, wherein the middle shell part comprises: an outer wall portion that includes a shock absorber mounting having a shock absorber recess configured to receive a shock absorber; and
an upper shell connected to the lower shell in a fixed manner and at least in portions forms a closed hollow member with the lower shell.
19. A motor vehicle having a self-supporting body with a rear frame having on both sides of a center longitudinal axis a side member comprising:
a lower shell having three shell parts that, in an extension direction of the side member, are arranged one after the other, wherein a middle shell part of the three shell parts is arranged at least in portions between the other two of the three shell parts and is configured as a metal cast component, wherein the middle shell part comprises: an outer wall portion that includes a shock absorber mounting having a shock absorber recess configured to receive a shock absorber; and
an upper shell connected to the lower shell in a fixed manner and at least in portions forms a closed hollow member with the lower shell.
20. The side member according to claim 1 , wherein the middle shell part further comprises:
an inner wall portion; and
a floor portion that couples the outer wall portion to the inner wall portion such that the outer wall portion, the floor portion and the inner wall portion define a U-shape cross section.
21. The side member according to claim 20 , wherein the floor portion comprises:
a connecting region configured to receive a pin.
22. The side member according to claim 20 , wherein the middle shell part comprises:
a connecting region for connecting an axle swingarm, wherein the connecting region is configured as a box-shaped hollow profile; and
wherein the connecting region is integral with the floor portion that couples the outer wall portion to an inner wall portion.
23. The rear frame according to claim 18 , wherein the middle shell part further comprises:
an inner wall portion; and
a floor portion that couples the outer wall portion to the inner wall portion such that the outer wall portion, the floor portion and the inner wall portion define a U-shape cross section.
24. The rear frame according to claim 23 , wherein the floor portion comprises:
a connecting region configured to receive a pin.
25. The rear frame according to claim 23 , wherein the middle shell part comprises:
a connecting region for connecting an axle swingarm, wherein the connecting region is configured as a box-shaped hollow profile; and
wherein the connecting region is integral with the floor portion that couples the outer wall portion to an inner wall portion.
26. The motor vehicle according to claim 19 , wherein the middle shell part further comprises:
an inner wall portion; and
a floor portion that couples the outer wall portion to the inner wall portion such that the outer wall portion, the floor portion and the inner wall portion define a U-shape cross section.
27. The motor vehicle according to claim 26 , wherein the floor portion comprises:
a connecting region configured to receive a pin.
28. The motor vehicle according to claim 26 , wherein the middle shell part comprises:
a connecting region for connecting an axle swingarm, wherein the connecting region is configured as a box-shaped hollow profile; and
wherein the connecting region is integral with the floor portion that couples the outer wall portion to an inner wall portion.