• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A sub-frame arrangement in a vehicle and method thereof wherein the sub-frame arrangement comprises a sub-frame, a first body member, and rear attachment means for attaching said sub-frame to the first body member. The sub-frame is a dual part sub-frame comprising a lower sheet section formed in a single piece wherein said lower sheet section extends the entire length of said sub-frame. The lower sheet section is further formed with two rear portions each extending backwards in the travel direction of said vehicle and the rear portions are adapted to host the rear attachment means.(Fig. 3)
    公开号:SE1550635A1
    申请号:SE1550635
    申请日:2015-05-19
    公开日:2016-11-20
    发明作者:Svensson Martin；Andersson John-Erik；Karlsson Roger；ADAMSSON Dan；Leander Johan；KLINGBERG Johan；Stoddart Tom
    申请人:China-Euro Vehicle Tech Ab；
    IPC主号:
    专利说明:

    [1] [0001] The present invention relates generally to a sub-frame arrangement for retaining a rear section of a sub-frame in a vehicle.
    [2] [0002] ln prior art it is known to produce sub-frame arrangements comprisingmeans for releasing a sub-frame in order to direct the sub-frame arrangementunderneath a passenger cell of a vehicle. There are multiple different solutionsavailable in prior art describing methods and devices for detaching a sub-frame,such as pyrotechnical and mechanical solutions. The sub-frame arrangements ofthe prior art are generally adapted to cope with front collisions and releasing thesub-frame with a purpose of prolonging the deformation distance without the riskof pressing the engine and powertrain into the passenger compartment. However,while it is beneficial to prolong the deformation distance during normal frontcollisions such solutions reduces the amount of force that a vehicle structure/chassis / body absorb during a small offset collision.
    [3] [0003] ln prior art it is further known to enhance the deformation performance ofsub-frames through arranging releasing mechanisms that are adapted to bothabsorb part of the collision force and eventually give way releasing the sub-frame.This creates an uncontrolled deformation and path for the sub-frame, especially after the complete decoupling from the vehicle body.
    [4] [0004] lt would thereby be beneficial to provide a solution without at least someof the drawbacks of the prior art solutions.
    [6] [0006] Thus, the invention relates to a sub-frame arrangement in a vehicle,wherein said sub-frame arrangement comprises a sub-frame, a first body member,and rear attachment means for attaching said sub-frame to the first body member.The sub-frame is a dual part sub-frame comprising a lower sheet section formed ina single piece wherein said lower sheet section extends the entire length of saidsub-frame. The lower sheet section is further formed with two rear portions eachextending backwards in the travel direction of said vehicle and the rear portionsare adapted to host the rear attachment means.
    [7] [0007] lt is one advantage with the present solution that the sub-frame is a dualpart sub-frame which decreases production cost and enables that the materialconsumption is kept to a minimum. lt is further more beneficial that the lower sheetsection is in one piece for enhancing safety properties during deformation caused by a collision.
    [8] [0008] The rear portions arranged in the lower sheet section allows for the sub-frame to deform in a novel way that enhance the deformation properties of thesub-frame arrangement and the safety of the vehicle wherein the sub-frame arrangement is arranged.
    [9] [0009] lt is further one advantage with the present solution that the lower sheetsection of the sub-frame extends the entire length of the sub-frame. Throughextending the entire length the sub-frame can absorb the forces from collisionswithout additional components and the lower sheet section helps the rearattachment means to secure the sub-frame in place firmly.
    [10] [0010] According to one embodiment of the sub-frame arrangement, the dualpart sub-frame further comprises a top section comprising two towers.
    [11] [0011] lt is one advantage with the present solution that the sub-framearrangement further comprises a top section that constitutes the second part of thesub-frame. The top section comprises geometrical shapes that are more difficult to 20016OSE produce than the lower sheet section and it is thereby one advantage with thepresent solution that those features are collectively arranged in one production part of the sub-frame.
    [12] [0012] According to one embodiment of the sub-frame arrangement the topsection is constituted of at least two parts.
    [13] [0013] lt is one advantage with the present solution that the top sectionaccording to one embodiment comprises multiple parts while the lower sheetsection merely comprises one part. From a production perspective is the sub-frame according to the present solution cost effective to produce.
    [14] [0014] According to one embodiment of the sub-frame arrangement, the rearportions are adapted to deform during a collision allowing the sub-frame to bedirected under a passenger cell of the vehicle.
    [15] [0015] lt is one advantage with the present solution that the lower sheet sectioncomprises rear portions that are adapted to deform in a controlled mannerdirecting the sub-frame under the passenger cell. The controlled deformationenables that the collision force is absorbed during the deformation, the sub-framearrangement is moved in a controlled direction and the overall safety of the vehicleis thereby improved.
    [16] [0016] According to one embodiment of the sub-frame arrangement the rearportions are adapted to deform and the rear attachment means adapted to retainan engagement between the rear section of the sub-frame and the first bodymember during deformation caused by a collision.
    [17] [0017] lt is further an advantage with the present solution that the rear portionsboth are adapted to deform and retain an engagement. This has the effect thatalthough the rear portions of the lower sheet section deforms in a directionbackwards relating to the travel direction of the vehicle the sub-frame maintains inengagement with the rest of the body throughout the entire collision anddeformation sequence. As previously mentioned the deformation allows forabsorption of force through extending the deformation distance during a collision 200160SE and through the deformation of the rear portions as such. The present solutionfurther enhance the safety effect reached by such a solution by retaining anengagement between the rear section of the sub-frame and the body membershindering the sub-frame arrangement to completely detach from the vehicle. lt isfurther more advantageous to maintain the engagement with the rear fasteningmeans in order to prevent the engine and other parts located in an enginecompartment of a vehicle from entering the passenger cell and/or damage thestructure thereof.
    [18] [0018] lt is furthermore one advantage with one embodiment of the presentsolution that the front section of the sub-frame is released. This enables for asufficient amount of load to transfer to the rear portions of the sub-frame allowing it to deform in a controlled manner.
    [19] [0019] Through retaining the rear attachment means engagement between thesub-frame and the body during deformation it is possible to control the deformationof the sub-frame and how at least parts of the power train behaves during adeformation. lt is further more advantageous that the lower sheet section extendsthe entire length of the sub-frame since this produces a sub-frame that is rigid andcan be used to absorb additional force. For example, in one embodiment may therear portions be deformed until instead of allowing deformation the furtherdeformation is retained through hindering the sub-frame from moving furtherbackwards in relation to the vehicle's direction of travel.
    [20] [0020] According to one embodiment of the sub-frame arrangement is the sub-frame arrangement adapted to enable the deformation distance to increase duringa front collision by directing the sub-frame under the passenger cell and the sub-frame arrangement is further adapted to maintain the deformation distancesubstantially unaffected during a small offset collision. This has the effect that thesub-frame detaches from the vehicle during all forms of major front collisionsindependent of the amount of collision area. One of the main challenges withenhancing the safety of vehicles are to cope with small offset collisions whereinonly a fraction of the vehicle's force absorption surface is affected by the collision. 200160SE Through retaining the rear section of the sub-frame in engagement with the body,while still allowing for deformation, the engine rotates out of the way during a smalloffset collision while the structural integrity of the sub-frame helps to absorb thecollision force from the small offset collision.
    [21] [0021] One advantage with the two rear portions of the lower sheet section ofthe sub-frame is that the deformation distance that is created adapts depending ofthe type of collision. For example, with a traditional sub-frame arrangement inaccordance with prior art wherein the rear section of, or the entire, sub-framedetaches from the vehicle the deformation distance is the same independent of thetype of collision.
    [22] [0022] According to on embodiment of the sub-frame arrangement, the sub-frame arrangement further comprises a release attachment means adapted torelease the sub-frame during deformation. The rear attachment means areadapted to not release the sub-frame during said deformation.
    [23] [0023] lt is one advantage with the present solution that in one embodiment is amain bolt arranged on each side of the sub-frame to secure the sub-frame to thevehicle body. However, the release attachment means are in one embodimentadapted to release the sub-frame from engagement during deformation andallowing the sub-frame to only be secured to the vehicle body through the rear attachment means.
    [24] [0024] According to one embodiment the sub-frame arrangement furthercomprises a second body member and front attachment means adapted to fasten a front section of said sub-frame to the second body member.
    [25] [0025] According to one embodiment of the sub-frame arrangement the frontfastening means are adapted to release the sub-frame from engagement with thesecond body member during deformation caused by a collision.
    [26] [0026] lt is one advantage with the present solution that according to oneembodiment the front fastening means that attach a front section of the sub-frame to the body members are adapted to completely release the front section of the 200160SE sub-frame from engagement with the vehicle in order to allow for controlleddeformation. This helps directing the sub-frame arrangement in a direction towards the space below the passenger cell.
    [27] [0027] According to one embodiment of the sub-frame arrangement the lowersheet section has a substantially flat shape formed from a single piece of any one of sheet metal and aluminum.
    [28] [0028] lt is one advantage with the present solution that the rear portions allowsfor greater force absorption than during normal release of a sub-frame which hasthe effect that aluminum can be used without decreasing the ability of the sub-frame to absorb force. This enables that the arrangement in one embodiment is lighter than conventional sub-frame arrangements.
    [29] [0029] According to one embodiment of the sub-frame arrangement the entiredeformation is until the vehicle has reached a complete stop after the collision.
    [30] [0030] According to one embodiment of the sub-frame arrangement the sub-frame arrangement is adapted to: - enable a long deformation distance during a full front collision through directingthe sub-frame (2) under the passenger cell, - enable a shorter deformation distance during a moderate overlap collision thanduring a full front collision through allowing the first rear portion (21a) to deformdifferent from the second rear portion (21 b), and - thereby enable low passenger cell intrusion during a moderate overlap collisionthrough allowing a shorter deformation distance than during said full front collisions.
    [31] [0031] According to one embodiment of the sub-frame arrangement at least oneof said rear portions are adapted to deform over a second length longer than thefirst length allowing the rear portion to absorb additional force through limiting the sub-frame movement in the deformation direction.
    [32] [0032] According to one embodiment is the first length the deformation lengthuntil the sub-frame reaches a point interfering with a longitudinal center axis of at 20016OSE least one of the rear fastening means and the second length a length longer thansaid first length. However, the person skilled in the art understands that the firstand second lengths can be any lengths within the sub-frame arrangement as longas the first length is shorter than the second length.
    [33] [0033] According to one aspect of the sub-frame arrangement in a vehicle forreleasing a sub-frame during a collision the sub-frame arrangement comprises asub-frame, a first body member, and rear attachment means for attaching the sub-frame to the first body member. The sub-frame is a dual part sub-frame comprisinga lower sheet section formed in a single piece wherein said lower sheet sectionextends the entire length of said sub-frame. The lower sheet section further isformed with two rear portions each extending backwards in the travel direction ofsaid vehicle. The rear portions are adapted to host the rear attachment meanswherein the method comprises the steps: - deforming the two rear portions backwards relative a travel direction of saidvehicle, and - retaining engagement between said sub-frame and said first body member.
    [34] [0034] According to one embodiment the dual part sub-frame further comprisesa top section comprising two towers.
    [35] [0035] According to one embodiment the sub-frame is directed under a passenger cell of the vehicle when the rear portions deform during a collision.
    [36] [0036] According to one embodiment the sub-frame arrangement furthercomprises a second body member and front attachment means adapted to fasten a front section of said sub-frame to the second body member.
    [37] [0037] According to one embodiment is the sub-frame released fromengagement with the second body member during deformation caused by acollision, preferably a front collision.
    [38] [0038] According to one embodiment the lower sheet section has a substantially flat shape formed from a single piece of any one of sheet metal and aluminum. 200160SE
    [39] [0039] According to one embodiment are the following steps performed: - releasing the sub-frame from engagement through a release attachment means,- deforming the sub-frame over a length, and - directing the sub-frame under a passenger cell of the vehicle when the rearportions deform during a collision.
    [40] [0040] According to one embodiment are the following steps performed: - releasing the sub-frame from attachment means other than the rear attachmentmeans, - deforming the rear portions over a length, and - directing the sub-frame under a passenger cell of the vehicle when the rear portions deform during a collision.
    [41] [0041] ln one embodiment are the attachment means other than the rearattachment means the front attachment means and at least one other attachmentmeans, preferably a release attachment means. ln another embodiment is theother attachment means only the front attachment means. The person skilled inthe art understands that the other attachment means might be any form of attachment means except for the rear attachment means.
    [42] [0042] According to one embodiment the following steps are performed:- deform at least one of said rear portions over a second length longer than thefirst length allowing the rear portion to absorb additional force through limiting the sub-frame movement in the deformation direction.
    [43] [0043] ln one embodiment is the first length the length of deformation as shown in figure 8, i.e. the deformed length of figure 8.
    [44] [0044] The above described embodiments may be combined or exchanged inany suitable way as long as not contradictory to the overall function of the sub- frame arrangement. 20016OSE Brief description of drawinqs
    [45] [0045] The invention is now described, by way of example, with reference to the accompanying drawings, in which:
    [46] [0046] Fig. 1 illustrates one embodiment of a sub-frame arrangement seen from below.
    [47] [0047] Fig. 2 illustrates one embodiment of lower sheet section adapted to bearranged in a sub-frame arrangement, wherein the lower sheet section is illustrated in an isometric view.
    [48] [0048] Fig. 3 illustrates one embodiment of the lower sheet section and the topsection of the sub-frame arrangement together constituting one embodiment of the sub-frame illustrated in an isomeric view.
    [49] [0049] Fig. 4 illustrates one embodiment of sub-frame of the sub-frame arrangement indicating the front section of the sub-frame.
    [50] [0050] Fig. 5 illustrates one embodiment of the sub-frame arrangementcomprising the sub-frame, attachment means, and body members, wherein the arrangement is arranged in a vehicle.
    [51] [0051] Fig. 6 illustrates one embodiment of the sub-frame arrangement afterdeformation caused by a collision.
    [52] [0052] Fig. 7 illustrates one embodiment of the sub-frame arrangementcomprising the sub-frame, attachment means, and body members, wherein the arrangement is arranged in a vehicle.
    [53] [0053] Fig. 8 illustrates one embodiment of the sub-frame arrangement afterdeformation caused by a collision.
    [54] [0054] Fig. 9 illustrate one embodiment of the sub-frame arrangement during a moderate overlap collision. 200160SE Description of embodiments
    [55] [0055] ln the following, a detailed description of different embodiments of thesub-frame arrangement is disclosed under reference to the accompanyingdrawings. All examples herein should be seen as part of the general descriptionand are therefore possible to combine in any way of general terms. Individualfeatures of the various embodiments and aspects may be combined or exchangedunless such combination or exchange is clearly contradictory to the overallfunction of the disclosed arrangement.
    [56] [0056] Briefly described the invention relates to a sub-frame arrangementcomprising a dual part sub-frame with a lower sheet section that is produced in asingle section. The lower sheet section further comprises two rear portionsarranged to attach the rear section of the sub-frame to the body of a vehicle. Therear portions are adapted to deform while retaining an engagement with the bodymembers of the vehicle and through all stages of a crash maintain saidengagement.
    [57] [0057] Figure 1 illustrates one embodiment of the sub-frame arrangement 1 in avehicle wherein the sub-frame 2 is attached to body members 3a, 3b. Theembodiment as shown in figure 1 illustrates the sub-frame arrangement 1 duringnormal conditions where no crash has occurred. The person skilled in the artunderstands that figure 1 only illustrates parts of the components that would bearranged in a vehicle and that the illustration only is one example adapted toillustrate the characteristics of the sub-frame arrangement 1. Figure 1 furtherillustrates that the sub-frame 2 is attached with front fastening means 4b and rearfastening means 4a adapted to secure the sub-frame 2 within the sub-framearrangement 1. The sub-frame 2 is thereby fastened to the body members 3a, 3bof the vehicle body.
    [58] [0058] The illustration of figure 1 shows the sub-frame arrangement 1 frombelow and thereby also the sub-frame 2 from below. The sub-frame 2 is a dualpart sub-frame constituted of two main sections, a top section 2a and a lower sheet section 2b. ln figure 1 is the lower sheet section 2b clearly visible while only 200160SE11 parts of the top section 2a are in view. The remaining parts of the top section 2aare blocked from view by the lower sheet section 2b. However, it should be notedthat in one embodiment as illustrated in figure 1 are the front fastening means 4barranged to fasten a front section of the sub-frame 2 through fastening the topsection 2a.
    [59] [0059] Figure 1 further i|ustrates the two rear portions 21 that extendsbackwards from a main body of the lower sheet section 2b of the sub-frame 2. Therear portions 21 hosts the rear fastening means 4a, preferably two on each side ofthe sub-frame as illustrated in the embodiment of figure 1.
    [60] [0060] ln one embodiment as illustrated in figure 1 are the front body members3b extending forward and together constituting part of the engine compartment.However, the person skilled in the art understands that the design andembodiments of the body members may be altered to any form of suitable designwithin the scope of the solution.
    [61] [0061] Figure 1 further i|ustrates one embodiment wherein a release attachmentmeans 4d adapted to fasten the sub-frame 2 in the sub-frame arrangement 1 andthereby during normal driving conditions keep the sub-frame in fixed engagementwithin the vehicle. The distance between the release attachment means 4d andthe rear attachment means 4a is in one embodiment selected to determine thedeformation direction of the sub-frame 2. l.e. in order to direct the sub-frame 2under a passenger cell of the vehicle.
    [62] [0062] Figure 2 i|ustrates one embodiment of the lower sheet section 3b of thesub-frame 2 in detail. The lower sheet section 2b is formed from a single piece andcomprises two rear portions that extends backwards in order to create deformationdistance for the sub-frame 2 while enabling that the sub-frame 2 is directedunderneath a passenger cell in the event of a front collision. The term collision asused herein might refer to any form of crash and it should be noted that similardeformation might occur from other events than a front collision. However, themain scope of the invention is to resolve issues relating to the differences incharacteristics between front collisions wherein a large collision area is affected 200160SE12 and small offset collisions wherein only a fraction of the front area absorbs the collision force.
    [63] [0063] Figure 2 further illustrates that the lower sheet section 2b of the sub-frame 2 might comprise any number of apertures, metal stampings, pressings, orother alterations to the form of the lower sheet section 2b. ln one embodiment areat least some of the mentioned machining's to the lower section 2b adapted to enable engagement with the top section 2a.
    [64] [0064] Figure 2 further illustrates that the rear portions 21 of the lower sheetsection 2b in one embodiment comprises apertures 25 adapted to host the rearattachment means 4b. ln a preferred embodiment each rear portion 21 comprises two apertures 25.
    [65] [0065] Figure 3 illustrates one embodiment of the assembled sub-frame 2comprising both the lower sheet section 2b and the top section 2a. Figure 3 furtherillustrates one embodiment of the top section 2a comprising two towers 22extending upwards from the main body of the sub-frame 2. ln one embodiment arefront attachment sockets 33 arranged at the top of each tower 22 which areadapted to host fastening means 4b.
    [66] [0066] Figure 3 further illustrates the two towers 22 which hosts the attachmentsockets 33. The attachment socket comprises the weakened portion 42. Theattachment socket 33 comprising a weakened portion 42 is in one embodimentadapted to deform in a way that the weakened portion 42 gives way opening upthe attachment socket 33 allowing for the attachment means 4b to be releasedfrom the attachment socket 33 and thereby releasing the front section 31 of thesub-frame 2.
    [67] [0067] Figure 4 illustrates one embodiment of the sub-frame 2 wherein the frontsection 31 and the rear section 32 are illustrated.
    [68] [0068] Figure 5 illustrates one embodiment of the sub-frame arrangement 1wherein the sub-frame 2 is arranged within a vehicle and additional components ofthe vehicle are comprised in the illustration. The sub-frame 2 is attached to body 20016OSE13 members of the vehicle through front fastening means 4b and rear attachmentmeans 4a. ln one embodiment are the fastening means 4a, 4b bolts arrangedthrough going through apertures in the sub-frame 2. Figure 5 further i|ustrates thesub-frame arrangement 1 in a state wherein no co|ision or crash has occurred, i.e. during normal driving conditions.
    [69] [0069] Figure 6 i|ustrates one embodiment of the sub-frame arrangement 1wherein a co|ision has occurred, or a co|ision is in progress, wherein the sub-frame 2 thereby has deformed backwards and the rear portions 21 have deformedallowing the sub-frame 2 to be directed in a direction towards the spaceunderneath the passenger cell 50.
    [70] [0070] ln one embodiment is the sub-frame 2 released from the front fasteningmeans 4b during deformation caused by a co|ision while the rear portions 21deforms in a direction downwards and backwards in relation to the travel directionof the vehicle. Through the deformation of the rear portions 21 are force absorbedwhile the sub-frame 2 is directed towards the space underneath the passenger cell50.
    [71] [0071] Figure 7 i|ustrates one embodiment wherein the sub-frame arrangement1 is shown from a side view wherein the details of the sub-frame 2 is furtherillustrated. The sub-frame 2 is retained in the front section 31 by front fasteningmeans 4a that are passing through a fastening socket 33 creating an engagementbetween the sub-frame 2 and the body members 3. The sub-frame 2 is furtherattached to the vehicle in its rear section 32 by the fastening means 4a passingthrough the sub-frame 2, in more detail passing through the rear portions 21, andengaging with the body of the vehicle.
    [72] [0072] Figure 8 i|ustrates one embodiment of the sub-frame arrangementwherein the the rear portions 21 have deformed directing the sub-frame under thepassenger cell 50. ln one embodiment the front fastening means 4b are left in thebody member 3 of the vehicle while the attachment socket 33 opens up andreleases the front section 31 of the sub-frame. 20016OSE14
    [73] [0073] Figure 9 illustrates one embodiment of the sub-frame arrangement 1wherein a moderate overlap collision has occurred deforming the sub-frame 2more on the left side than on the right side of the vehicle. The rear portions 21 hasdeformed differently wherein the first rear portion 21a has deformed in a wayrestraining the rotation force of the deformation while the second rear portion 21 bhas deformed absorbing a large amount of longitudinal force from the collision.
    [74] [0074] Depending of the collision direction, force, and collision area of thevehicle the force that shall be absorbed and the deformation distance that shall notbe exceeded differs. For example, during absorption of collision force from a fullfront collisions it is beneficial to maximize the deformation distance. This is in oneembodiment of the sub-frame arrangement 1 conducted through slightlydecreasing the energy absorption capacity per length unit for full front collisions.The lost energy absorption per length unit is compensated for by a longerdeformation distance. This has a beneficial impact on the safety performance of the vehicle.
    [75] [0075] According to one embodiment the rear portions 21 are deformed to thepoint where the rear portions 21 retains the sub-frame 2 from moving furtherbackwards, this occurs when the rear portions 21 reaches their deformation end point.
    权利要求:
    Claims (14)
    [1] 1. A sub-frame arrangement (1) in a vehicle, wherein said sub-framearrangement (1) comprises a sub-frame (2), a first body member (3a), and rearattachment means (4a) for attaching said sub-frame (2) to the first body member(3a), characterized in that said sub-frame (2) is a dual part sub-frame (2)comprising a lower sheet section (2b) formed in a single piece wherein said lowersheet section (2b) extends the entire length of said sub-frame (2), and in thatsaid lower sheet section (2b) further is formed with two rear portions (21) eachextending backwards in the travel direction of said vehicle, wherein said rear portions (21) are adapted to host the rear attachment means (4a).
    [2] 2. The sub-frame arrangement (1) according to claim 1, wherein said dualpart sub-frame (2) further comprises a top section (2a) comprising two towers (22).
    [3] 3. The sub-frame arrangement (1) according to any one of claims 1-2,wherein the rear portions (21) are adapted to deform during a collision allowing thesub-frame (2) to be directed under a passenger cell of the vehicle.
    [4] 4. The sub-frame arrangement (1) according to claim 3, wherein said sub-frame arrangement (1 ) further comprises a release attachment means (4d)adapted to release the sub-frame (2) during said deformation and wherein the rearattachment means (4a) are adapted to retain the sub-frame (2) during said deformation.
    [5] 5. The sub-frame arrangement (1) according to any one of claims 1-4,wherein the rear portions (21) are adapted to deform and the rear attachmentmeans (4a) are adapted to retain an engagement between the rear portion (21) ofthe sub-frame (2) and the first body member (3a) during the entire deformationcaused by a collision.
    [6] 6. The sub-frame arrangement (1) according to claim 5, wherein the entiredeformation is until the vehicle has reached a complete stop after the collision. 20016OSE16
    [7] 7. The sub-frame arrangement (1) according to any one of claims 1-6,wherein the sub-frame arrangement (1) is adapted to - enable a long deformation distance during a full front collision through directingthe sub-frame (2) under the passenger cell, - enable a shorter deformation distance during a moderate overlap collision thanduring a full front collision through allowing the first rear portion (21a) to deformdifferent from the second rear portion (21 b), and - thereby enable low passenger cell intrusion during a moderate overlap collisionthrough allowing a shorter deformation distance than during said full front collisions.
    [8] 8. The sub-frame arrangement (1) according to any one of claims 1-7,wherein at least one of said rear portions (21) are adapted to deform over a length(L1) longer than the length (L) allowing the rear portion (21) to absorb additionalforce through limiting the sub-frame (2) movement in the deformation direction.
    [9] 9. The sub-frame arrangement (1) according to any one of claims 1-8,wherein said sub-frame arrangement (1) further comprises a second body member(3b) and front attachment means (4b) adapted to fasten a front section of said sub-frame (2) to the second body member (3b).
    [10] 10. The sub-frame arrangement (1) according to claim 9, wherein said frontfastening means (4b) are adapted to release the sub-frame (2) from engagementwith the second body member (3b) during deformation caused by a collision.
    [11] 11. The sub-frame arrangement (1) according to any one of claims 1-10,wherein said lower sheet section (2b) has a substantially flat shape formed from a single piece of any one of sheet metal and aluminium.
    [12] 12. A method in a sub-frame arrangement (1) in a vehicle for partly releasinga sub-frame (2) during a collision, wherein said sub-frame arrangement (1) is thesub-frame arrangement (1) according to any one of claims 1-11, wherein themethod comprises the steps: - deforming the two rear portions (21) backwards relative a travel direction of said 20016OSE17 vehicle, and- retaining engagement between said sub-frame (2) and said first body member(3a).
    [13] 13. The method according to claim 12, wherein the method further comprisesthe steps: - releasing the sub-frame (2) from attachment means (4) other than the rearattachment means (4a), - deforming the rear portions (21) over a length (L), and - directing the sub-frame (2) under a passenger cell of the vehicle when the rearportions (21) deform during a collision.
    [14] 14. The method according to any one of claims 12-13, wherein the methodfurther comprises the steps: - deform at least one of said rear portions (21) over a length (L1) longer than thelength (L) allowing the rear portion (21) to absorb additional force through limiting the sub-frame (2) movement in the deformation direction.
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1550635A|SE540071C2|2015-05-19|2015-05-19|Sub-frame method and arrangement for retaining a rear section of a sub-frame|SE1550635A| SE540071C2|2015-05-19|2015-05-19|Sub-frame method and arrangement for retaining a rear section of a sub-frame|
    PCT/SE2016/050369| WO2016186546A1|2015-05-19|2016-04-26|Sub-frame method and arrangement for retaining a rear section of a sub-frame|
    CN201680028566.2A| CN107635859B|2015-05-19|2016-04-26|Subframe method and structure for reserving a rear section of a subframe|
    EP16722421.1A| EP3297893B1|2015-05-19|2016-04-26|Sub-frame method and arrangement for retaining a rear section of a sub-frame|
    US15/727,834| US10259503B2|2015-05-19|2017-10-09|Sub-frame method and arrangement for retaining a rear section of a sub-frame|
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