CN114261269A - Automobile rear collision protection structure and hybrid electric vehicle - Google Patents
Automobile rear collision protection structure and hybrid electric vehicle Download PDFInfo
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- CN114261269A CN114261269A CN202111442369.4A CN202111442369A CN114261269A CN 114261269 A CN114261269 A CN 114261269A CN 202111442369 A CN202111442369 A CN 202111442369A CN 114261269 A CN114261269 A CN 114261269A
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- 238000010521 absorption reaction Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
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- 239000000446 fuel Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The embodiment of the application discloses collision protection architecture behind car relates to car technical field, has solved car back panel upset downwards, from the extruded problem of battery package on the battery package. The automobile rear collision protection structure comprises a bearing bottom frame and a rear gear frame, wherein the bearing bottom frame is arranged in a spare tire pit of an automobile and fixed with a floor beam of the automobile and used for bearing a battery pack, the rear gear frame is fixed at the position, facing the rear of the automobile, of the bearing bottom frame, and the height of the rear gear frame in the vertical direction is not lower than the battery pack. The utility model provides a collision protection structure behind car is used for protecting the battery package.
Description
Technical Field
The embodiment of the application relates to the technical field of automobiles, in particular to an automobile rear collision protection structure and a hybrid electric vehicle.
Background
Since the hybrid vehicle has both a fuel system and a battery pack, the battery pack can be disposed only in a limited space. The battery pack has high energy, and the battery pack is subjected to collision and extrusion to cause short circuit in the battery so as to cause the failure of the battery, and the battery pack is subjected to fire and explosion in severe cases. Therefore, in order to prevent the battery pack from being crushed by collision when the tail of the automobile collides, a sufficient crush space needs to be reserved between the tail of the automobile and the battery pack. The method for reducing the length of the battery pack along the length direction of the automobile body can ensure a sufficient crumpling space, but the length of the battery pack along the height direction of the automobile body is increased, so that the space of a trunk is reduced, and the method for lengthening the rear overhang size of the automobile is adopted, so that the size of the whole automobile is overlarge.
According to the related art, the sunken frame structure is arranged in the spare tire pit, the battery pack is arranged in the frame structure and is fixedly connected with the frame structure, vibration displacement of the battery pack is effectively limited, the battery pack is prevented from being collided and extruded with a vehicle frame, and meanwhile, when a large collision occurs at the tail of a vehicle, the rear collision safety protection effect of the battery pack in a limited crumple space is improved.
However, when the rear portion of the automobile is greatly collided, and the upper portion of the automobile back panel is turned downwards, the automobile back panel can extrude the battery pack from the upper portion of the battery pack, so that the battery pack is damaged, and even fire and explosion are caused.
Disclosure of Invention
The embodiment of the application provides a collision protection structure behind car has improved the collision security of battery package top.
In a first aspect, an embodiment of the present application provides an automobile rear collision protection structure, including bearing underframe and back gear frame, wherein, bear the underframe and set up in the spare tyre pit of automobile, fixed with the floor roof beam of automobile for bear the battery package, the back gear frame is fixed in the position of bearing underframe towards the automobile rear, and the height of back gear frame along vertical direction is not less than the battery package.
The embodiment of the application provides a pair of collision protection architecture behind car, bearing frame sets up in the spare tyre hole of car, and with the floor beam fixed connection of car, bearing frame is used for bearing the battery package, the back keeps off the frame and fixes the position of bearing the underframe towards the car rear, and the back shelves frame is not less than the battery package along the height of vertical direction, when the vehicle rear portion receives great collision emergence deformation, the back keeps off the frame and absorbs part striking energy through warping, protect the battery package, prevent that the battery package from receiving the collision extrusion, and simultaneously, when the back panel receives the striking, when overturning downwards, the back that highly is not less than the battery package keeps off the frame and can protect the battery package, avoid the battery package to receive the extrusion from upper portion. Compare through the vibration displacement of sunken frame construction restriction battery package among the correlation technique, prevent that battery package from bumping the extrusion with the frame to and improve the back of battery package and bump the safety protection effect, this application sets up the back through bearing the underframe towards the fixed position at car rear and keeps off the frame, has improved the collision security of battery package top, and driver's the security of traveling.
In a possible implementation manner of the present application, the rear bumper frame includes at least two support beams and a rear bumper beam, and the support beams are arranged along a vertical direction, and the rear bumper beam is arranged along a horizontal direction and fixed at upper ends of the two support beams.
The supporting beam can be two, also can be more than two, and when the supporting beam was more than two, the back kept off the frame steadiness height, and non-deformable for simplifying the structure, practices thrift the cost, and the supporting beam is two in this application embodiment. The supporting beams can be arranged along the vertical direction and can also be arranged along the direction forming a certain angle with the vertical direction, as long as a plurality of supporting beams are arranged on the same plane, the plane formed by the rear stop beam and the supporting beams can be vertical to the horizontal plane and can also form a certain included angle with the horizontal plane. In order to improve the steadiness of the rear fender frame, the two supporting beams are arranged along the vertical direction in the embodiment of the application, and the rear fender beam is arranged along the horizontal direction and is fixedly connected with the two supporting beams.
In one possible implementation manner of the present application, two of the support beams that are farthest away are fixed to two ends of the rear fender beam, respectively. The two of the support beams that are the farthest apart may also be positioned between the ends of the rear fender beams. In order to improve the overall collapse energy absorption effect of the rear fender beam, two of the support beams which are farthest away are respectively fixed with two ends of the rear fender beam in the embodiment of the application.
In one possible implementation of the present application, the length of the back stop is identical to the width of the battery pack in the extending direction of the back stop. The length of the back stop beam may be greater than the width of the battery pack in the direction of extension of the back stop beam. In order to improve the utilization ratio of the rear stop beam and save the cost, the length of the rear stop beam in the embodiment of the application is equal to the width of the battery pack along the extending direction of the rear stop beam.
In one possible implementation of the present application, the upper end of the rear bumper beam is flush with the upper surface of the battery pack. The upper end of the rear stop beam can be higher than the upper surface of the battery pack, and the battery pack can be prevented from being extruded from the upper part as long as the upper end of the rear stop beam is not lower than the upper surface of the battery pack. In order to make the carpet can pave, increase the space of suitcase, the upper end of back fender roof beam in this application embodiment is flush with the upper surface of battery package.
In one possible implementation manner of the present application, the lower end of the supporting beam is fixed with the bearing bottom frame. The lower end of the support beam can also be fixed with the floor. When the lower end of the supporting beam is fixed with the floor, the length of the whole structure of the automobile rear collision protection structure along the direction of the automobile body is too long, and the space of a trunk is reduced. Therefore, in order to reduce the length of the overall structure of the automobile rear collision protection structure along the direction of the automobile body and increase the space of the trunk, the lower end of the support beam is fixed with the bearing bottom frame in the embodiment of the application.
In a possible implementation manner of the application, the bearing bottom frame comprises two longitudinal beams and two cross beams, the two longitudinal beams are parallel to each other, the cross beams are arranged between the two longitudinal beams, the two longitudinal beams are fixed with the floor beam of the automobile, and two ends of the cross beam are fixed with the two longitudinal beams respectively. The number of the cross beams can be two or more, and the number of the longitudinal beams can be two or more. When the number of the longitudinal beams is two, the two longitudinal beams are arranged at two ends of the cross beam in parallel, if the number of the cross beam is two, two ends of one of the two longitudinal beams are respectively fixed with the end parts of the two longitudinal beams, and the other longitudinal beam can be arranged in parallel with the end parts of the two longitudinal beams or form a certain included angle; if the number of the cross beams is more than two, two ends of one of the cross beams are respectively fixed with the end parts of the two longitudinal beams, and the rest cross beams can be arranged in parallel with the cross beams or can be mutually intersected. When the longitudinal beams are more than two, and the cross beams are more than two, the longitudinal beams are arranged in parallel, the cross beams are parallel to each other and are perpendicular to the longitudinal beams, and the longitudinal beams and the cross beams form a grid structure.
In one possible implementation manner of the application, the longitudinal beam is provided with a mounting through hole, and the longitudinal beam penetrates through the mounting through hole through a fastener to be fixed with a floor beam of an automobile. The longitudinal beam and the floor beam of the automobile can be fixedly connected through bolts and nuts and can also be integrally formed. If the floor roof beam integrated into one piece of longeron and car, when damage appears in crossbeam or one of them longeron or the back fender frame among the collision protection structure behind the car, dismantle inconveniently, the collision protection structure behind the car that can't be renewed, consequently, for convenient dismantlement and change, the longeron passes through fastener fixed connection with the floor roof beam of car in this application embodiment.
In a possible implementation manner of the application, the cross beam comprises a first cross beam, a second cross beam and a third cross beam which are sequentially parallel and arranged at intervals along the direction from front to back of the automobile, and two ends of the first cross beam and two ends of the third cross beam are connected with two ends of two longitudinal beams to form a frame-shaped structure. The number of the first beam, the second beam and the third beam may be one or more. First crossbeam, second crossbeam and third crossbeam can dismantle with two longerons and be connected, also can weld together, and in order to improve collision protection structure's behind the car stability, first crossbeam, second crossbeam and third crossbeam and two longerons welding are in the same place in this application embodiment.
In a possible implementation manner of the application, the positions of the first cross beam and the second cross beam corresponding to the battery pack are recessed downwards to form a bending bearing part, the battery pack is placed in the bending bearing part, and the third cross beam is located on the side face, facing the rear of the automobile, of the battery pack. The first cross member and the second cross member may have a downward recess corresponding to the position of the battery pack, or may not have a recess. When first crossbeam and second crossbeam do not have sunkenly, the battery package is fixed on first crossbeam and second crossbeam, and is high, can't pave the carpet, has wasted the suitcase space. Therefore, in order to reduce the height of the battery, ensure that the carpet is paved and save the space of the trunk, the positions of the first cross beam and the second cross beam corresponding to the battery pack are sunken downwards to form a bending bearing part, the battery pack is placed in the bending bearing part, and the third cross beam is positioned on the side surface of the battery pack towards the rear of the automobile. Make first crossbeam and second crossbeam press close to the spare tyre hole more through sunken, reduced the height of battery package, guarantee that the carpet is paved and save the suitcase space.
In one possible implementation of the present application, the depth of the bending bearing part is equal to half of the thickness of the battery pack. The depth of the bending bearing part can be one third, one fourth and the like of the thickness of the battery pack. In order to improve the stability of the rear fender frame in the width direction of the vehicle body, the depth of the bent bearing part is equal to half of the thickness of the battery pack, so that the third cross beam is located in the middle of the side face, facing the rear of the automobile, of the battery pack.
In a second aspect, an embodiment of the present application provides a hybrid vehicle, including a vehicle frame, the vehicle rear collision protection structure of any one of the first aspect, and a battery pack, where the vehicle rear collision protection structure is disposed in a spare tire pit and fixed to the vehicle frame, and the battery pack is fixed in the vehicle rear collision protection structure.
Because the hybrid vehicle axle that this application embodiment provided includes the car rear collision protection structure of any one in the first aspect, consequently, the same technical problem can be solved to the two to reach the same technological effect.
Drawings
Fig. 1 is a schematic structural diagram of a hybrid electric vehicle according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of an automobile rear collision protection structure according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural view of an automobile rear collision protection structure fixed to an automobile floor beam according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a fixed battery pack in an automobile rear collision protection structure according to an embodiment of the present application.
Reference numerals:
1-a vehicle frame; 11-spare wheel pit; 12-floor beam; 13-back boarding; 2-a rear collision protection structure of the automobile; 21-a load-bearing bottom frame; 211-longitudinal beams; 2111-mounting a through hole; 212-a cross beam; 2121-first beam; 2122-a second beam; 2123-third beam; 2124-bending the bearing part; 22-a rear gear rack; 221-a support beam; 222-rear stop beam; and 3-battery pack.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, specific technical solutions of the present application will be described in further detail below with reference to the accompanying drawings in the embodiments of the present application. The following examples are intended to illustrate the present application but are not intended to limit the scope of the present application.
In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present application, "a plurality" means two or more unless otherwise specified.
In addition, in the embodiments of the present application, directional terms such as "upper", "lower", "left", and "right" are defined with respect to the schematically-placed orientation of components in the drawings, and it is to be understood that these directional terms are relative concepts, which are used for descriptive and clarifying purposes, and may be changed accordingly according to changes in the orientation in which the components are placed in the drawings.
In the embodiments of the present application, unless otherwise explicitly specified or limited, the term "connected" is to be understood broadly, for example, "connected" may be a fixed connection, a detachable connection, or an integral body; may be directly connected or indirectly connected through an intermediate.
In the embodiments of the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
The embodiment of the application provides a hybrid vehicle, refer to fig. 1, including frame 1, car rear collision protection structure 2 and battery package 3, wherein, the position that frame 1 is located the rear is equipped with spare tyre hole 11, and car rear collision protection structure 2 sets up in spare tyre hole 11, and is fixed with frame 1, and battery package 3 is fixed in car rear collision protection structure 2. In the hybrid electric vehicle of the embodiment of the present application, the battery pack 3 is fixed in the rear collision protection structure 2 of the vehicle, and referring to fig. 4, the collision safety of the battery pack 3 and the driving safety of the driver are improved.
The battery pack fixing structure in the related art comprises a front cross beam, a middle cross beam and a rear cross beam, wherein the front cross beam, the middle cross beam and the rear cross beam are fixedly connected through a left longitudinal beam and a right longitudinal beam, mounting holes for mounting battery packs 3 are formed in the front cross beam and the middle cross beam, and the battery packs 3 are fixed on the mounting holes through fasteners. The shortcoming of above-mentioned scheme does, can restrict battery package 3's vibration displacement on the front beam with battery package 3 is fixed and the middle cross beam, prevent that battery package 3 from colliding the extrusion with frame 1, and simultaneously, when the car afterbody takes place great collision, the rear beam has improved battery package 3's back and has bumped the safety protection effect, however, receive great collision when the vehicle rear portion, when making 13 upper portions of car back shroud overturn downwards, 3 upper portions of battery package are extrudeed to car back shroud 13 can follow battery package, lead to battery package 3 impaired, even cause the fire, the explosion.
The automobile rear collision protection structure 2 of the embodiment of the application carries out new design on the structure, refer to fig. 2, a rear baffle frame is arranged at a position of a bearing bottom frame 21 towards the rear of an automobile, the height of the rear baffle frame 22 in the vertical direction is not lower than that of a battery pack 3, and the rear and the upper sides of the battery pack 3 are subjected to collapse energy absorption protection through the rear baffle frame, so that the automobile is subjected to large collision, for example, rear-end collision occurs, and when deformation is caused, the positions of the battery pack 3 towards the rear and the upper sides of the automobile cannot be subjected to collision extrusion, and unsafe accidents caused by damage of the battery pack 3 are avoided.
Referring to fig. 2, the present embodiment provides a rear collision protection structure 2 for a vehicle, including a load-bearing bottom frame 21 and a rear bumper frame 22, wherein the load-bearing bottom frame 21 is disposed in a spare wheel well 11 of the vehicle, fixed to a floor beam 12 of the vehicle, and used for bearing a battery pack 3, the rear bumper frame 22 is fixed at a position of the load-bearing bottom frame 21 facing the rear of the vehicle, and a height of the rear bumper frame 22 in a vertical direction is not lower than the height of the battery pack 3.
The embodiment of the application provides a rear collision protection structure 2 for an automobile, a bearing frame is arranged in a spare tire pit 11 of the automobile and is fixedly connected with a floor beam 12 of the automobile, a bearing bottom frame 21 is used for bearing a battery pack 3, the size of the battery pack 3 along the length direction of the automobile body is increased by arranging the battery pack 3 in the spare tire pit 11, so that the size of the battery pack 3 along the height direction of the automobile body is reduced, the space of a trunk is increased, a rear baffle frame is fixed at the position of the bearing bottom frame 21 towards the rear of the automobile, the height of the rear baffle frame 22 along the vertical direction is not lower than that of the battery pack 3, the rear baffle frame can be fixedly connected with the floor of the automobile and also can be fixedly connected with the bearing bottom frame 21, when the rear part of the automobile is deformed by large collision, the rear baffle frame absorbs part of collision energy by deformation, so that the battery pack 3 is protected in a small collapse space, prevent that battery package 3 from receiving the collision extrusion, simultaneously, receive the striking when back panel 13, during the upset downwards, highly be not less than battery package 3's back fender frame can protect battery package 3, avoids battery package 3 to receive the extrusion from upper portion. Compare through the vibration displacement of sunken frame construction restriction battery package 3 among the correlation technique, prevent that battery package 3 from colliding the extrusion with frame 1 to and improve battery package 3's back and bump the safety protection effect, this application sets up the back through bearing underframe 21 towards the fixed position of car rear and keeps off the frame, has improved battery package 3's collision security nature, and driver's the security of traveling.
The back keeps off the frame and includes supporting beam 221 and back fender roof beam 222 after this application embodiment, and supporting beam 221 can be two, also can be more than two, as long as a plurality of supporting beams 221 set up in the coplanar can, when supporting beam 221 is more than two, the back keeps off the frame steadiness height, and non-deformable for simplify the structure, practice thrift the cost, refer to fig. 2, supporting beam 221 is two in this application embodiment.
Both support beams 221 may be disposed in a vertical direction; the two support beams 221 may also be disposed at an angle to the vertical, for example, the two support beams 221 are disposed in a splayed shape, or disposed in parallel. The plane formed by the rear fender beam 222 and the support beam 221 may be perpendicular to the horizontal plane or may form an angle with the horizontal plane.
In order to improve the stability of the rear fender bracket, referring to fig. 2, in the embodiment of the present invention, two support beams 221 are disposed along a vertical direction, and a rear fender beam 222 is disposed along a horizontal direction and is fixedly connected to the two support beams 221.
It should be noted that one rear fender 222 may be fixed to the upper ends of the two support beams 221, and a plurality of rear fender 222 may be further provided, and the rear fender 222 may be evenly spaced along the extending direction of the support beams 221, and one of the plurality of rear fender 222 is fixed to the upper ends of the two support beams 221.
The two farthest apart support beams 221 may be fixed to both ends of the rear fender 222, or may be fixed to any position between both ends of the rear fender 222. When the two farthest support beams 221 are fixed at any position between the two ends of the rear fender beam 222, the collapse energy absorption function of the portion of the rear fender beam 222 extending out of the support beam 221 is weak, and therefore, in order to improve the overall collapse energy absorption function of the rear fender beam 222, the two farthest support beams 221 in the embodiment of the present application are respectively fixed to the two ends of the rear fender beam 222.
The length of the rear ribs 222 may be equal to the width of the battery pack 3 in the extending direction of the rear ribs 222, or may be greater than the width of the battery pack 3 in the extending direction of the rear ribs 222. When the length of the back stop beam 222 is greater than the width of the battery pack 3 in the extending direction of the back stop beam 222, except for the portion having the same width as the battery pack 3, the other portion does not protect the battery pack 3, and therefore, in order to improve the utilization rate of the back stop beam 222 and save the cost, referring to fig. 4, the length of the back stop beam 222 in the embodiment of the present application is equal to the width of the battery pack 3 in the extending direction of the back stop beam 222.
The upper end of the rear stop beam 222 may be flush with the upper surface of the battery pack 3 or higher than the upper surface of the battery pack 3, and the upper end of the rear stop beam 222 may prevent the battery pack 3 from being pressed from the upper portion as long as it is not lower than the upper surface of the battery pack 3. When the upper end of the rear stop beam 222 is higher than the upper surface of the battery pack 3, the carpet cannot be laid flat, the space of the trunk is reduced, and therefore, in order to enable the carpet to be laid flat and increase the space of the trunk, referring to fig. 1, the upper end of the rear stop beam 222 in the embodiment of the present application is flush with the upper surface of the battery pack 3.
The lower end of the support beam 221 may be fixed to the load-bearing bottom frame 21 or the floor. When the lower end of the support beam 221 is fixed to the floor, the overall structure of the rear collision protection structure 2 for an automobile is too long in the direction of the vehicle body, reducing the space of the trunk. Therefore, in order to reduce the length of the entire structure of the rear collision protection structure 2 in the vehicle body direction and increase the space of the trunk, referring to fig. 2, the lower end of the support beam 221 is fixed to the load-bearing underframe 21 in the embodiment of the present application.
The load-bearing bottom frame 21 in the embodiment of the present application includes longitudinal beams 211 and cross beams 212, the number of the cross beams 212 may be two or more, and the number of the longitudinal beams 211 may also be two or more. When the number of the longitudinal beams 211 is two, the two longitudinal beams 211 are arranged at two ends of the cross beam 212 in parallel, if the number of the cross beam 212 is two, two ends of one of the two longitudinal beams are respectively fixed with the end parts of the two longitudinal beams 211, and the other longitudinal beam can be arranged in parallel with the end parts of the two longitudinal beams 211 or form a certain included angle; if there are more than two cross beams 212, two ends of one of the cross beams are respectively fixed with the ends of two longitudinal beams 211, and the rest of the cross beams 212 may be arranged in parallel with the end of the longitudinal beams or in an intersecting manner. When the number of the longitudinal beams 211 is two or more and the number of the cross beams 212 is two or more, the longitudinal beams 211 are arranged in parallel with each other, the cross beams 212 are arranged in parallel with each other and are perpendicular to the longitudinal beams 211, and the longitudinal beams 211 and the cross beams 212 form a grid structure.
The side member 211 may or may not be fixedly connected to the floor beam 12 of the automobile.
In order to improve the stability of the bottom frame 21 for supporting the battery pack 3 and the reliability of the overall structure, referring to fig. 2, in the embodiment of the present invention, there are two longitudinal beams 211 that are parallel to each other, a cross beam 212 is disposed between the two longitudinal beams 211, the two longitudinal beams 211 are respectively fixed to the left and right longitudinal beams of the floor beam 12, and two ends of the cross beam 212 are respectively fixed to the two longitudinal beams 211, so that the rear collision protection structure 2 of the vehicle and the left and right longitudinal beams of the floor beam 12 form an H-shaped stable structure.
The side member 211 may be fixedly connected to the floor beam 12 of the automobile by a fastener, or may be integrally formed. If longeron 211 and the floor roof beam 12 integrated into one piece of car, when crossbeam 212 or one of them longeron 211 or the back in the collision protection structure 2 after the car damaged, it is inconvenient to dismantle, the collision protection structure 2 after the unable car of renewal, therefore, for the convenience dismantle and change, refer to fig. 3, longeron 211 passes through fastener fixed connection with the floor roof beam 12 of car in this application embodiment, make protection structure and floor behind the car form firm stable frame structure, when bumping, longeron 211 and floor behind the car form a body structure, regional rigidity has been strengthened greatly, guaranteed this region not to warp, be connected with crossbeam 212 simultaneously, make car width direction firmly be connected, can not take place inhomogeneous unstability condition because longeron 211 warp when having guaranteed to collide.
Specifically, referring to fig. 3, in the embodiment of the present application, a mounting through hole 2111 is formed in the longitudinal beam 211, and the longitudinal beam 211 passes through the mounting through hole 2111 through a fastener to be fixed to the floor beam 12 of the automobile. The fastener may be a bolt and a nut.
The number of the cross beams 212 may be two or more, and in order to improve the bearing stability of the bearing underframe 21 while saving cost, referring to fig. 2, in the embodiment of the present application, the cross beam 212 includes a first cross beam 2121, a second cross beam 2122, and a third cross beam 2123 that are sequentially arranged in parallel and at intervals along the front-to-rear direction of the automobile, and both ends of the first cross beam 2121 and the third cross beam 2123 are connected to both ends of the two longitudinal beams 211 to form a frame-shaped structure.
The first cross member 2121, the second cross member 2122, and the third cross member 2123 may be detachably connected to the two longitudinal members 211, or may be welded together, and in order to improve the stability of the rear collision protection structure 2 of the automobile, the first cross member 2121, the second cross member 2122, and the third cross member 2123 are welded together with the two longitudinal members 211 in the embodiment of the present application.
Specifically, the material of the longitudinal beam 211 is a profile.
The first and second beams 2121 and 2122 may have a downward recess or no recess at a position corresponding to the battery pack 3. When the first and second beams 2121 and 2122 are not depressed, the battery pack 3 is fixed to the first and second beams 2121 and 2122 at a high height, which makes it impossible to lay the carpet flat, and thus wastes trunk space. Therefore, in order to reduce the height of the battery, ensure that the carpet is flat, and save the space of the trunk, referring to fig. 2, the first cross beam 2121 and the second cross beam 2122 are recessed downward corresponding to the position of the battery pack 3 to form a bent bearing part 2124, the battery pack 3 is placed in the bent bearing part 2124, and the third cross beam 2123 is located on the side of the battery pack 3 facing the rear of the automobile. Make first crossbeam 2121 and second crossbeam 2122 press close to spare tyre hole 11 more through sunken, reduced battery package 3's height, guarantee that the carpet is paved and save suitcase space.
The battery pack 3 may be directly placed in the bent bearing portion 2124, or may be fixedly connected to the first beam 2121 and the second beam 2122. When the battery pack 3 is directly placed in the bending bearing part 2124, and an automobile is impacted, the battery pack 3 may collide with the rear bumper beam, which may cause damage, in order to improve the stability of the battery pack 3 in the bending bearing part 2124, in the embodiment of the present invention, mounting point nuts are provided on the first cross beam 2121 and the second cross beam 2122, mounting support corners are provided on the battery pack 3, and the battery pack 3 is fixed with the first cross beam 2121 and the second cross beam 2122 by bolts.
The depth of the bending bearing part 2124 is half, one third, one fourth, etc. of the thickness of the battery pack 3, and it is only necessary that the depth is greater than zero, and in order to improve the stability of the rear bumper bracket in the vehicle width direction, the depth of the bending bearing part 2124 in the embodiment of the present application is equal to half of the thickness of the battery pack 3, so that the third cross beam 2123 is located in the middle of the side surface of the battery pack 3 facing the rear of the vehicle.
Referring to fig. 1, an embodiment of the present application provides a hybrid vehicle, including a vehicle frame 1, a vehicle rear collision protection structure 2 in any of the above embodiments, and a battery pack 3, where the vehicle rear collision protection structure 2 is disposed in a spare wheel well 11 and fixed to the vehicle frame 1, and the battery pack 3 is fixed in the vehicle rear collision protection structure 2.
The serial numbers of the embodiments in this application are for description only and do not represent the merits of the embodiments. The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.
Claims (12)
1. An automobile rear collision protection structure, characterized by comprising:
the bearing bottom frame is arranged in a spare tire pit of the automobile, is fixed with a floor beam of the automobile and is used for bearing the battery pack;
and the rear gear frame is fixed at a position of the bearing bottom frame towards the rear of the automobile, and the height of the rear gear frame along the vertical direction is not lower than that of the battery pack.
2. The automobile rear collision protection structure according to claim 1, wherein the rear bumper frame includes at least two support beams and a rear bumper beam, the support beams being arranged in a vertical direction, and the rear bumper beam being arranged in a horizontal direction and fixed to upper ends of the two support beams.
3. The automobile rear collision protection structure according to claim 2, characterized in that two of the support beams that are farthest apart are fixed to both ends of the rear fender, respectively.
4. The automobile rear impact protection structure according to claim 3, wherein a length of the rear fender is identical to a width of the battery pack in an extending direction of the rear fender.
5. The automobile rear collision protection structure according to claim 4, characterized in that an upper end of the rear bumper beam is flush with an upper surface of the battery pack.
6. The automobile rear collision protection structure according to claim 2, characterized in that the lower end of the support beam is fixed to the load-bearing underframe.
7. The automobile rear collision protection structure according to any one of claims 1 to 6, wherein the load-bearing underframe comprises two longitudinal beams and a cross beam, the two longitudinal beams are parallel to each other, the cross beam is arranged between the two longitudinal beams, the two longitudinal beams are fixed to a floor beam of an automobile, and two ends of the cross beam are respectively fixed to the two longitudinal beams.
8. The automobile rear collision protection structure according to claim 7, wherein the longitudinal beam is provided with a mounting through hole, and the longitudinal beam is fixed with a floor beam of an automobile by a fastener passing through the mounting through hole.
9. The automobile rear collision protection structure according to claim 7, wherein the cross beam comprises a first cross beam, a second cross beam and a third cross beam which are sequentially arranged in parallel and at intervals along the direction from front to back of the automobile, and two ends of the first cross beam and two ends of the third cross beam are connected with two ends of the two longitudinal beams to form a frame-shaped structure.
10. The automobile rear collision protection structure according to claim 9, wherein the first cross member and the second cross member are recessed downward at positions corresponding to the battery pack to form a bent bearing portion, the battery pack is placed in the bent bearing portion, and the third cross member is located on a side surface of the battery pack facing the rear of the automobile.
11. The automobile rear impact protection structure according to claim 9, wherein a depth of the bent carrier portion is equal to half a thickness of the battery pack.
12. A hybrid vehicle, characterized by comprising:
the vehicle frame is provided with a spare tire pit at the rear part;
the automobile rear collision protection structure according to any one of claims 1 to 11, provided in the spare tire well, fixed to the vehicle frame;
and the battery pack is fixed in the automobile rear collision protection structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111442369.4A CN114261269B (en) | 2021-11-30 | 2021-11-30 | Automobile rear collision protection structure and hybrid electric vehicle |
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| CN202111442369.4A CN114261269B (en) | 2021-11-30 | 2021-11-30 | Automobile rear collision protection structure and hybrid electric vehicle |
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| CN114261269A true CN114261269A (en) | 2022-04-01 |
| CN114261269B CN114261269B (en) | 2023-10-20 |
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Also Published As
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| CN114261269B (en) | 2023-10-20 |
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