CN114261269B - 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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- CN114261269B CN114261269B CN202111442369.4A CN202111442369A CN114261269B CN 114261269 B CN114261269 B CN 114261269B CN 202111442369 A CN202111442369 A CN 202111442369A CN 114261269 B CN114261269 B CN 114261269B
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- 238000005452 bending Methods 0.000 claims description 14
- 230000000694 effects Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000001771 impaired effect Effects 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The embodiment of the application discloses a rear collision protection structure of an automobile, relates to the technical field of automobiles, and solves the problem that a rear coaming of the automobile turns downwards and presses a battery pack from the upper part of the battery pack. The automobile rear collision protection structure comprises a bearing bottom frame and a rear baffle frame, wherein the bearing bottom frame is arranged in a spare tire pit of an automobile and is fixed with a floor beam of the automobile, and the rear baffle frame is used for bearing a battery pack and is fixed at a position of the bearing bottom frame towards the rear of the automobile, and the height of the rear baffle frame along the vertical direction is not lower than that of the battery pack. The automobile rear collision protection structure is used for protecting a battery pack.
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
Hybrid vehicles have both a fuel system and a battery pack, and therefore the battery pack can be disposed only in a limited space. The battery pack has higher energy, and the internal short circuit of the battery can be caused to cause the failure of the battery due to collision and extrusion, and the battery pack is ignited and exploded when serious. Therefore, in order to avoid collision of the tail of the automobile, the battery pack is extruded by collision, and enough crumple 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 vehicle body can ensure enough crumple space, but the length of the battery pack along the height direction of the vehicle body is increased, the space of the trunk is reduced, and the whole vehicle is oversized by lengthening the rear overhang size of the vehicle.
The prior art is characterized in that the sinking type frame structure is arranged in the spare tire pit, the battery pack is arranged in the frame structure and fixedly connected with the frame structure, so that vibration displacement of the battery pack is effectively limited, the battery pack is prevented from being collided and extruded with the frame, and meanwhile, when the tail of the automobile is collided greatly, the rear collision safety protection effect of the battery pack in a limited crumple space is improved.
However, when the rear part of the automobile is subjected to a large collision, and the upper part of the automobile rear surrounding plate is turned downwards, the automobile rear surrounding plate can squeeze the battery pack from the upper part of the battery pack, so that the battery pack is damaged, and even fires and explosions are initiated.
Disclosure of Invention
The embodiment of the application provides an automobile rear collision protection structure, which improves the collision safety above a battery pack.
In a first aspect, an embodiment of the present application provides a rear collision protection structure for an automobile, including a bearing bottom frame and a rear shelf, where the bearing bottom frame is disposed in a spare tire pit of the automobile and is fixed to a floor beam of the automobile, and is used for bearing a battery pack, and the rear shelf is fixed at a position where the bearing bottom frame faces the rear of the automobile, and a height of the rear shelf along a vertical direction is not lower than the battery pack.
According to the automobile rear collision protection structure provided by the embodiment of the application, the bearing frame is arranged in the spare tire pit of the automobile and is fixedly connected with the floor beam of the automobile, the bearing frame is used for bearing the battery pack, the rear baffle frame is fixed at the position of the bearing bottom frame towards the rear of the automobile, the height of the rear baffle frame along the vertical direction is not lower than that of the battery pack, when the rear part of the automobile is deformed due to larger collision, the rear baffle frame absorbs part of collision energy through deformation to protect the battery pack, the battery pack is prevented from being collided and extruded, and meanwhile, when the rear baffle plate is collided and overturned downwards, the rear baffle frame with the height not lower than that of the battery pack can protect the battery pack, and the battery pack is prevented from being extruded from the upper part. Compared with the prior art that the vibrating displacement of the battery pack is limited through the sunken frame structure, the battery pack is prevented from being collided and extruded with the frame, and the rear collision safety protection effect of the battery pack is improved.
In one possible implementation manner of the application, the rear shelf comprises at least two supporting beams and rear blocking beams, wherein the supporting beams are arranged along the vertical direction, and the rear blocking beams are arranged along the horizontal direction and are fixed at the upper ends of the two supporting beams.
The number of the supporting beams can be two or more, and when the number of the supporting beams is more than two, the rear baffle frame is high in stability and not easy to deform, so that the structure is simplified, the cost is saved, and the number of the supporting beams is two in the embodiment of the application. The supporting beams can be arranged in the vertical direction or in 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 backstop beams and the supporting beams can be perpendicular to the horizontal plane, and a certain included angle can be formed between the backstop beams and the horizontal plane. In order to improve the stability of the rear baffle frame, two supporting beams are arranged in the vertical direction, and the rear baffle beam is arranged in the horizontal direction and fixedly connected with the two supporting beams.
In one possible implementation of the application, the two furthest apart support beams are fixed to the two ends of the backstop beam, respectively. The two furthest support beams can also be arranged between the two ends of the backstop beam. In order to improve the whole collapsing energy absorption effect of the backstop beam, two furthest-away support beams in the embodiment of the application are respectively fixed with two ends of the backstop beam.
In one possible implementation of the present application, the length of the backstop beam is identical to the width of the battery pack in the extending direction of the backstop beam. The length of the back stop beam may be greater than the width of the battery pack in the extending direction of the back stop beam. In order to improve the utilization rate of the back stop beam and save cost, the length of the back stop beam in the embodiment of the application is equal to the width of the battery pack along the extending direction of the back stop beam.
In one possible implementation of the application, the upper end of the rear rail is flush with the upper surface of the battery pack. The upper end of the back retaining beam can be higher than the upper surface of the battery pack, and the upper end of the back retaining beam can prevent the battery pack from being extruded from the upper part as long as the upper end of the back retaining beam is not lower than the upper surface of the battery pack. In order to enable the carpet to be paved, the space of the trunk is increased, and the upper end of the rear baffle beam is flush with the upper surface of the battery pack in the embodiment of the application.
In one possible implementation of the application, the lower end of the support beam is fixed to the carrying floor 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 overall structure of the rear collision protection structure of the automobile is too long along the direction of the automobile body, so that the space of the luggage case is reduced. Therefore, in order to reduce the length of the overall structure of the rear collision protection structure of the automobile in the vehicle body direction and increase the space of the trunk, the lower end of the support beam is fixed with the bearing underframe in the embodiment of the application.
In one possible implementation manner of the application, the bearing underframe comprises two longitudinal beams and a cross beam, the longitudinal beams are parallel to each other, the cross beam is 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 respectively fixed with the two longitudinal beams. 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 the two ends of the cross beam in parallel, and if the number of the cross beam is two, the two ends of one longitudinal beam are respectively fixed with the ends of the two longitudinal beams, and the other longitudinal beam can be arranged in parallel with the end of the two longitudinal beams or can form a certain included angle; if the number of the cross beams is more than two, two ends of one cross beam 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, the transverse beams are more than two, the longitudinal beams are mutually parallel, the transverse beams are mutually parallel and are perpendicular to the longitudinal beams, and the longitudinal beams and the transverse beams form a grid structure.
In one possible embodiment of the application, the longitudinal beam is provided with a mounting through-hole, through which the longitudinal beam is fastened to the floor beam of the motor vehicle by means of a fastening element. The longitudinal beam and the floor beam of the automobile can be fixedly connected through bolts and nuts, and can be integrally formed. If the longitudinal beam and the floor beam of the automobile are integrally formed, when the cross beam or one of the longitudinal beams or the rear baffle frame in the rear collision protection structure of the automobile is damaged, the rear collision protection structure of the automobile cannot be replaced, so that the longitudinal beam and the floor beam of the automobile are fixedly connected through the fastener for convenient disassembly and replacement.
In one 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 are arranged at intervals along the front-to-back direction of the automobile, and two ends of the first cross beam and the third cross beam are connected with two ends of the two longitudinal beams to form a frame-shaped structure. The first beam, the second beam and the third beam may be one or more. The first cross beam, the second cross beam and the third cross beam can be detachably connected with the two longitudinal beams, and can also be welded together.
In one possible implementation manner of the application, the first beam and the second beam are recessed downwards corresponding to the position of the battery pack to form a bending bearing part, the battery pack is placed in the bending bearing part, and the third beam is positioned on the side surface of the battery pack facing the rear of the automobile. The first beam and the second beam may have a downward recess or may have no recess corresponding to the position of the battery pack. When first crossbeam and second crossbeam do not have the sunken, the battery package is fixed on first crossbeam and second crossbeam, and the height is higher, can't pave the carpet, has wasted the suitcase space. Therefore, in order to reduce the height of the battery, ensure the carpet to be paved and save the space of the trunk, in the embodiment of the application, the positions of the first beam and the second beam corresponding to the battery pack are downwards sunken to form a bending bearing part, the battery pack is placed in the bending bearing part, and the third beam is positioned on the side surface of the battery pack facing the rear of the automobile. The first cross beam and the second cross beam are closer to the spare tire pit through the pits, the height of the battery pack is reduced, and the carpet is paved to save the space of the trunk.
In one possible implementation of the application, the depth of the bent carrying part is equal to half 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 baffle frame in the width direction of the vehicle body, the depth of the bending bearing part in the embodiment of the application is equal to half of the thickness of the battery pack, so that the third cross beam is positioned in the middle of the side surface of the battery pack facing the rear of the vehicle.
In a second aspect, an embodiment of the present application provides a hybrid electric vehicle, including a frame, the rear collision protection structure of any one of the first aspects, and a battery pack, where the rear collision protection structure of the vehicle is disposed in a spare tire well, fixed to the frame, and the battery pack is fixed in the rear collision protection structure of the vehicle.
The hybrid vehicle axle provided by the embodiment of the application comprises the vehicle rear collision protection structure according to any one of the first aspect, so that the hybrid vehicle axle and the vehicle rear collision protection structure can solve the same technical problems and achieve the same technical effects.
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 application;
fig. 3 is a schematic structural view of an automobile rear collision protection structure according to an embodiment of the present application, where the rear collision protection structure is fixed to an automobile floor beam;
fig. 4 is a schematic structural view of a fixed battery pack in a rear collision protection structure of an automobile according to an embodiment of the present application.
Reference numerals:
1-a frame; 11-a spare tire pit; 12-floor beams; 13-a back panel; 2-a rear collision protection structure of an automobile; 21-a carrying bottom frame; 211-stringers; 2111-mounting through holes; 212-a cross beam; 2121-a first cross member; 2122-a second cross beam; 2123-a third cross member; 2124-bending the bearing part; 22-a rear shelf; 221-supporting beams; 222-a rear fender; 3-battery pack.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more apparent, the 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 illustrative of the application and are not intended to limit the scope of the application.
In embodiments of the present application, the terms "first," "second," and the like 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 defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
Furthermore, in the embodiments of the present application, the terms "upper," "lower," "left," and "right," etc., are defined with respect to the orientation in which the components in the drawings are schematically disposed, and it should be understood that these directional terms are relative terms, which are used for descriptive and clarity with respect to each other, and which may vary accordingly with respect to the orientation in which the components in the drawings are disposed.
In embodiments of the present application, unless explicitly specified and limited otherwise, the term "connected" is to be construed broadly, and for example, "connected" may be either a fixed connection, a removable connection, or an integral unit; can be directly connected or indirectly connected through an intermediate medium.
In 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In embodiments of the application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment of the present application is not to be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
The embodiment of the application provides a hybrid electric vehicle, referring to fig. 1, comprising a vehicle frame 1, a rear collision protection structure 2 and a battery pack 3, wherein a spare tire pit 11 is arranged at the rear position of the vehicle frame 1, the rear collision protection structure 2 is arranged in the spare tire pit 11 and is fixed with the vehicle frame 1, and the battery pack 3 is fixed in the rear collision protection structure 2 of the vehicle. In the hybrid electric vehicle according to the embodiment of the 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 package fixed knot of related art constructs including front cross beam, well crossbeam and rear cross beam, and front cross beam, well crossbeam and rear cross beam pass through left longeron and right longeron fixed connection, are equipped with the mounting hole that is used for installing battery package 3 on front cross beam and the well crossbeam, and battery package 3 passes through the fastener to be fixed on the mounting hole. The shortcoming of above-mentioned scheme is, can restrict the vibration displacement of battery package 3 on front beam and middle beam with battery package 3, prevent that battery package 3 from taking place collision extrusion with frame 1, simultaneously, when the great collision of car afterbody takes place, the rear beam has improved the back bump safety protection effect of battery package 3, but, receive great collision when the vehicle rear portion for when 13 upper portions of car back panel overturn downwards, 13 can extrude battery package 3 from battery package 3 upper portion, lead to battery package 3 impaired, initiate the fire even explosion.
According to the automobile rear collision protection structure 2 disclosed by the embodiment of the application, a rear baffle frame is arranged at the position of the bearing bottom frame 21 facing the rear of an automobile, the height of the rear baffle frame 22 in the vertical direction is not lower than that of the battery pack 3, and the rear baffle frame is used for collapsing and absorbing energy to protect the rear and the upper sides of the battery pack 3, so that the automobile is subjected to larger collision, for example, rear-end collision occurs, and when deformation occurs, the position of the battery pack 3 facing the rear and the upper sides of the automobile is not extruded by collision, and unsafe accidents caused by damage of the battery pack 3 are avoided.
Referring to fig. 2, an embodiment of the present application provides a rear collision protection structure 2 for an automobile, including a bearing bottom frame 21 and a rear shelf 22, where the bearing bottom frame 21 is disposed in a spare tire pit 11 of the automobile and is fixed to a floor beam 12 of the automobile, and is used for bearing a battery pack 3, the rear shelf 22 is fixed at a position of the bearing bottom frame 21 towards the rear of the automobile, and the height of the rear shelf 22 in the vertical direction is not lower than the battery pack 3.
According to the automobile rear collision protection structure 2 provided by the embodiment of the application, the bearing frame is arranged in the spare wheel pit 11 of the automobile and is fixedly connected with the floor beam 12 of the automobile, the bearing bottom frame 21 is used for bearing the 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 wheel 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, the 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 due to large collision, the rear baffle frame absorbs part collision energy through deformation, the battery pack 3 is protected under the extremely small crumple space, meanwhile, when the rear baffle plate 13 is impacted, the rear baffle frame is not lower than that the battery pack 3 can protect the battery pack 3, and the battery pack 3 is prevented from being extruded from the upper part. Compared with the prior art that the vibration displacement of the battery pack 3 is limited through a sunken frame structure, the battery pack 3 is prevented from being collided and extruded with the frame 1, and the rear collision safety protection effect of the battery pack 3 is improved, the rear baffle frame is fixedly arranged at the position of the bearing bottom frame 21 towards the rear of the automobile, so that the collision safety of the battery pack 3 and the driving safety of a driver are improved.
The rear baffle frame in the embodiment of the application comprises two support beams 221 and more than two rear baffle beams 222, and the support beams 221 can be arranged on the same plane as long as the plurality of support beams 221 are arranged on the same plane, when the support beams 221 are more than two, the rear baffle frame has high stability and is not easy to deform, so that the structure is simplified, the cost is saved, and referring to fig. 2, the support beams 221 in the embodiment of the application are two.
Both support beams 221 may be disposed in a vertical direction; the two support beams 221 may also be arranged at an angle to the vertical, for example, the two support beams 221 may be arranged in a splayed arrangement, or in parallel. The plane formed by the backstop 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, two support beams 221 are disposed in a vertical direction, and a rear fender beam 222 is disposed in a horizontal direction and fixedly connected to the two support beams 221.
It should be noted that, the number of the back stop beams 222 may be one, and they may be fixed to the upper ends of the two support beams 221, and the number of the back stop beams 222 may be plural, and they may be uniformly spaced along the extending direction of the support beams 221, and one of the back stop beams 222 is fixed to the upper ends of the two support beams 221.
The two furthest support beams 221 may be fixed to the two ends of the backstop beam 222, or may be fixed to any position between the two ends of the backstop beam 222. When two furthest from the support beam 221 are fixed at any position between the two ends of the backstop beam 222, the portion of the backstop beam 222 extending out of the support beam 221 has weaker crumple energy absorbing effect, so in order to improve the crumple energy absorbing effect of the whole backstop beam 222, the two furthest from the support beam 221 in the embodiment of the application are respectively fixed with the two ends of the backstop beam 222.
The length of the backstop beam 222 may be equal to the width of the battery pack 3 in the extending direction of the backstop beam 222, or may be greater than the width of the battery pack 3 in the extending direction of the backstop beam 222. When the length of the back stop beam 222 is greater than the width of the battery pack 3 along the extending direction of the back stop beam 222, other parts, except for the part with the same width as the battery pack 3, do not protect the battery pack 3, so in order to improve the utilization rate of the back stop beam 222 and save the cost, referring to fig. 4, in the embodiment of the application, the length of the back stop beam 222 is equal to the width of the battery pack 3 along the extending direction of the back stop beam 222.
The upper end of the backstop beam 222 can be flush with the upper surface of the battery pack 3, or can be higher than the upper surface of the battery pack 3, and the upper end of the backstop beam 222 can prevent the battery pack 3 from being extruded from the upper part as long as the upper end is not lower than the upper surface of the battery pack 3. When the upper end of the back stop beam 222 is higher than the upper surface of the battery pack 3, the carpet cannot be laid down, so that the space of the trunk is reduced, and therefore, in order to enable the carpet to be laid down, the space of the trunk is increased, and referring to fig. 1, the upper end of the back stop beam 222 is flush with the upper surface of the battery pack 3 in the embodiment of the present application.
The lower end of the support beam 221 may be fixed to the carrying floor frame 21 or may be fixed to 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 the automobile is excessively long in the vehicle body direction, 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 carrying floor frame 21 in the embodiment of the present application.
In the embodiment of the present application, the carrying underframe 21 includes two or more stringers 211 and a cross beam 212, and the cross beam 212 may be two or more stringers 211. 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, and if the number of the cross beam 212 is two, two ends of one of the two longitudinal beams 211 are respectively fixed with the end parts of the two longitudinal beams 211, and the other longitudinal beam 211 can be arranged in parallel or can form a certain included angle; if the number of the cross members 212 is two or more, two ends of one of the cross members may be fixed to the ends of the two longitudinal members 211, and the remaining cross members 212 may be disposed parallel to or intersecting each other. When the number of the longitudinal beams 211 is more than two and the number of the transverse beams 212 is more than two, the longitudinal beams 211 are arranged in parallel, the transverse beams 212 are parallel to each other and are perpendicular to the longitudinal beams 211, and the longitudinal beams 211 and the transverse beams 212 form a grid structure.
The longitudinal beam 211 may be fixedly connected to the floor beam 12 of the vehicle, or may not be fixedly connected to the floor beam 12 of the vehicle.
In order to improve the stability of the battery pack 3 carried by the carrying underframe 21 and the reliability of the overall structure, referring to fig. 2, in the embodiment of the present application, two longitudinal beams 211 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 with the left and right longitudinal beams of the floor beam 12, and two ends of the cross beam 212 are respectively fixed with the two longitudinal beams 211, so that the rear collision protection structure 2 of the automobile and the left and right longitudinal beams of the floor beam 12 form an H-shaped stable structure.
The longitudinal beam 211 and the floor beam 12 of the automobile can be fixedly connected through a fastener or can be integrally formed. If the longitudinal beam 211 and the floor beam 12 of the automobile are integrally formed, when the cross beam 212 or one of the longitudinal beams 211 or the rear baffle frame in the rear collision protection structure 2 of the automobile is damaged, the disassembly is inconvenient, and the new rear collision protection structure 2 of the automobile cannot be replaced, so that, for convenient disassembly and replacement, referring to fig. 3, the longitudinal beam 211 and the floor beam 12 of the automobile are fixedly connected through fasteners in the embodiment of the application, so that the protection structure and the rear floor of the automobile form a firm and stable frame structure, and when the collision occurs, the longitudinal beam 211 and the rear floor of the automobile form an integral structure, the regional rigidity is greatly enhanced, the region is ensured not to deform, and meanwhile, the longitudinal beam 211 is connected with the cross beam 212, so that the automobile is firmly connected in the width direction, and the condition of uneven instability caused by the deformation of the longitudinal beam 211 during the collision is ensured.
Specifically, referring to fig. 3, in the embodiment of the present application, a mounting through hole 2111 is formed in a longitudinal beam 211, and the longitudinal beam 211 is fixed to a floor beam 12 of an automobile by passing a fastener through the mounting through hole 2111. The fasteners may be bolts and nuts.
In order to save cost and improve the bearing stability of the bearing bottom frame 21, referring to fig. 2, in the embodiment of the present application, the cross beams 212 include a first cross beam 2121, a second cross beam 2122, and a third cross beam 2123 that are sequentially parallel to each other and spaced from each other along the front-to-back direction of the automobile, and two ends of the first cross beam 2121 and the third cross beam 2123 are connected to two ends of the two stringers 211 to form a frame 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, 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 stringers 211 is a profile.
First beam 2121 and second beam 2122 may or may not have a downward recess corresponding to the position of battery pack 3. When first beam 2121 and second beam 2122 do not have the recess, battery pack 3 is fixed on first beam 2121 and second beam 2122, and the height is higher, can't lay down the carpet, has wasted the suitcase space. Therefore, in order to reduce the height of the battery, ensure the carpet to be laid flat and save the space of the trunk, referring to fig. 2, in the embodiment of the present application, the first beam 2121 and the second beam 2122 are recessed downward corresponding to the position of the battery pack 3, so as to form a bending bearing portion 2124, the battery pack 3 is placed in the bending bearing portion 2124, and the third beam 2123 is located on the side of the battery pack 3 facing the rear of the automobile. The first cross beam 2121 and the second cross beam 2122 are closer to the spare tire pit 11 through the recess, so that the height of the battery pack 3 is reduced, and the carpet is paved to save the space of the trunk.
Battery pack 3 may be placed directly within fold bearing 2124 or may be fixedly attached to first beam 2121 and second beam 2122. When the battery pack 3 is directly placed in the bending bearing part 2124, the battery pack 3 collides with the rear bumper beam when the automobile is impacted, and damage is possibly caused.
The depth of the bending bearing portion 2124 is half, one third, one fourth, etc. of the thickness of the battery pack 3, so long as the depth is greater than zero, in order to improve the stability of the rear fender bracket in the vehicle width direction, in the embodiment of the present application, the depth of the bending bearing portion 2124 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 of the battery pack 3 facing the rear of the vehicle.
It should be noted that referring to fig. 1, an embodiment of the present application provides a hybrid electric vehicle, which includes a frame 1, a rear collision protection structure 2 of the vehicle in any of the above embodiments, and a battery pack 3, wherein the rear collision protection structure 2 of the vehicle is disposed in a spare tire well 11, and is fixed to the frame 1, and the battery pack 3 is fixed in the rear collision protection structure 2 of the vehicle.
The embodiment numbers of the present application are merely for description and do not represent advantages or disadvantages of the embodiments. The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the application, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. A rear collision protection structure for an automobile, 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 a battery pack;
the bearing bottom frame comprises two longitudinal beams and cross beams, wherein 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 floor beams of an automobile, and two ends of the cross beams are respectively fixed with the two longitudinal beams;
the cross beams comprise a first cross beam, a second cross beam and a third cross beam which are sequentially parallel to each other along the front-to-back direction of the automobile and are arranged at intervals; the first cross beam and the second cross beam are recessed downwards at positions corresponding to the battery pack 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 facing the rear of the automobile;
and the rear shelf is fixed at the position of the bearing bottom frame towards the rear of the automobile, and the height of the rear shelf along the vertical direction is not lower than that of the battery pack.
2. The rear collision protection structure according to claim 1, wherein the rear fender bracket includes at least two support beams and a rear fender beam, the support beams are arranged in a vertical direction, and the rear fender beams are arranged in a horizontal direction and are fixed to upper ends of the two support beams.
3. The rear collision protection structure for a vehicle according to claim 2, wherein two of the support beams furthest apart are fixed to both ends of the rear fender beam, respectively.
4. The rear collision protection structure for a vehicle according to claim 3, wherein a length of the rear fender beam and a width of the battery pack in an extending direction of the rear fender beam are identical.
5. The rear impact protection structure of claim 4, wherein an upper end of the rear fender is flush with an upper surface of the battery pack.
6. The rear collision protection structure for a vehicle according to claim 2, wherein the lower end of the support beam is fixed to the load-bearing bottom frame.
7. The rear collision protection structure for a vehicle according to any one of claims 1 to 6, wherein the side member is provided with a mounting through hole, and the side member is fixed to a floor beam of the vehicle by passing through the mounting through hole by a fastener.
8. The rear collision protection structure according to any one of claims 1 to 6, wherein both ends of the first cross member and the third cross member are connected to both ends of two side members to form a frame structure.
9. The rear collision protection structure for a vehicle according to any one of claims 1 to 6, wherein the depth of the bent bearing portion is equal to half the thickness of the battery pack.
10. A hybrid vehicle characterized by comprising:
the vehicle frame is provided with a spare tire pit at the rear position;
the rear collision protection structure of an automobile according to any one of claims 1 to 9, which is disposed in the spare tire pit and fixed to the frame;
and the battery pack is fixed in the automobile rear collision protection structure.
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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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| CN114261269B true CN114261269B (en) | 2023-10-20 |
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| CN114261269A (en) | 2022-04-01 |
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