Subframe assembly for a vehicle utilzing straight extruded longitudinal siderail members

Patent metadata

Field	Value
Publication number	US-2022410974-A1
Application number	US-202117356675-A
Country	US
Kind code	A1
Filing date	Jun 24, 2021
Priority date	Jun 24, 2021
Publication date	Dec 29, 2022
Grant date	—

Abstract

A subframe assembly for a vehicle utilizing straight, parallel extruded longitudinal siderail members. This subframe assembly provides front-end (or rear-end) crash energy absorbance by plastically deforming, crumpling, and bending down to avoid the stackup and occupant cabin intrusion of components, such as the attached engine/motor, engine/motor mounts, steering components, and suspension components. The laterally disposed longitudinal siderail members each provide a straight, substantially uninterrupted lower load path to transfer crash energy from the lower load path crash management system beam and crashboxes or the like to a rear upper load path body in white bracket, and ultimately to the battery frame in the event of a crash, with the siderail members and crashboxes optionally being longitudinally coaxially aligned.

First claim

What is claimed is:

1 . A subframe assembly for a vehicle, the subframe assembly comprising:
a pair of parallel siderail members, wherein each of the pair of parallel siderail members is straight from a top or bottom vehicle perspective and spans a distance between a lower load path crash management system of the vehicle and one or more of an upper load path and a battery frame of the vehicle in a substantially uninterrupted manner.

2 . The subframe assembly of claim 1 , wherein each of the pair of parallel siderail members is coaxially aligned with an associated crashbox of the lower load path crash management system from the top or bottom vehicle perspective.

3 . The subframe assembly of claim 2 , wherein the lower load path crash management system further comprises a lower load path beam coupled to the crashbox associated with each of the pair of parallel siderail members.

4 . The subframe assembly of claim 1 , wherein each of the pair of parallel siderail members comprises a first portion that is disposed above a second portion from a side vehicle perspective.

5 . The subframe assembly of claim 1 , wherein each of the pair of parallel siderail members comprises a top surface comprising one or more recessed trigger regions adapted to promote a downward bend of each of the parallel siderail members when a crash load is applied along a longitudinal axis of each of the parallel siderail members.

6 . The subframe assembly of claim 1 , wherein each of the pair of parallel siderail members is manufactured from extruded aluminum.

7 . The subframe assembly of claim 1 , further comprising one or more crossmembers coupled between the pair of parallel siderail members.

8 . The subframe assembly of claim 1 , wherein each of the pair of parallel siderail members spans a distance between the lower load path crash management system of the vehicle and a rear upper load path body in white bracket in an uninterrupted manner.

9 . The subframe assembly of claim 1 , wherein an end of each of the pair of parallel siderail members is separated from the battery frame by a small gap.

10 . A longitudinal siderail member for a subframe assembly of a vehicle, the longitudinal siderail member comprising:
an extruded aluminum body, wherein the extruded aluminum body is straight from a top or bottom vehicle perspective and is adapted to span a distance between a lower load path crash management system of the vehicle and one or more of an upper load path and a battery frame of the vehicle in a substantially uninterrupted manner.

11 . The longitudinal siderail member of claim 10 , wherein the extruded aluminum body is adapted to be coaxially aligned with an associated crashbox of the lower load path crash management system from the top or bottom vehicle perspective.

12 . The longitudinal siderail member of claim 11 , wherein the lower load path crash management system further comprises a lower load path beam coupled to the crashbox associated with the extruded aluminum body.

13 . The longitudinal siderail member of claim 10 , wherein the extruded aluminum body comprises a first portion that is disposed above a second portion from a side vehicle perspective.

14 . The longitudinal siderail member of claim 10 , wherein the extruded aluminum body comprises a top surface comprising one or more recessed trigger regions adapted to promote a downward bend of the extruded aluminum body when a crash load is applied along a longitudinal axis of the extruded aluminum body.

15 . The longitudinal siderail member of claim 10 , wherein the extruded aluminum body is adapted to be coupled to one or more crossmembers of the subframe assembly.

16 . The longitudinal siderail member of claim 10 , wherein the extruded aluminum body is adapted to span a distance between the lower load path crash management system of the vehicle and a rear upper load path body in white bracket in an uninterrupted manner.

17 . The longitudinal siderail member of claim 10 , wherein an end of the extruded aluminum body is adapted to be separated from the battery frame by a small gap.

18 . A method for manufacturing a vehicle, the method comprising:
providing a subframe assembly adapted to absorb crash energy, wherein the subframe assembly comprises a pair of parallel siderail members, wherein each of the pair of parallel siderail members is straight from a top or bottom vehicle perspective and spans a distance between a lower load path crash management system of the vehicle and one or more of an upper load path and a battery frame of the vehicle in a substantially uninterrupted manner; coupling a first end of each of the pair of parallel siderail members to the lower load path crash management system; and coupling a second end of each of the pair of parallel siderail members to the one or more of the upper load path and the battery frame.

19 . The method of claim 18 , wherein each of the pair of parallel siderail members defines a straight, substantially uninterrupted lower load path from the top or bottom vehicle perspective that is parallel to a longitudinal axis of the vehicle between the lower load path crash management system and the one or more of the upper load path and the battery frame.

20 . The method of claim 18 , wherein coupling the first end of each of the pair of parallel siderail members to the lower load path crash management system comprises coupling the first end of each of the pair of parallel siderail members to an associated longitudinally coaxially aligned crashbox of the lower load path crash management system.

21 . The method of claim 18 , wherein coupling the second end of each of the pair of parallel siderail members to the one or more of the upper load path and the battery frame comprises coupling the second end of each of the pair of parallel siderail members to a rear upper load path body in white bracket with the second end of each of the pair or parallel siderail members spaced apart from the battery frame by a small gap.

Assignees

• Volvo Car Corp

Inventors

• Eklund Johan

Classifications

• B62D21/155 Primary

  Sub-frames or underguards · CPC title

• B62D21/03

  transverse members providing body support · CPC title

• B60K1/04

  of the electric storage means for propulsion · CPC title

• B62D29/008

  predominantly of light alloys, e.g. extruded · CPC title

• B60K2001/0438

  Arrangement under the floor · CPC title