WO2023202408A1 - 后扭力盒、下车体及车辆 - Google Patents

后扭力盒、下车体及车辆 Download PDF

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Publication number
WO2023202408A1
WO2023202408A1 PCT/CN2023/087378 CN2023087378W WO2023202408A1 WO 2023202408 A1 WO2023202408 A1 WO 2023202408A1 CN 2023087378 W CN2023087378 W CN 2023087378W WO 2023202408 A1 WO2023202408 A1 WO 2023202408A1
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WO
WIPO (PCT)
Prior art keywords
rear torsion
torsion box
vehicle
lower body
protruding
Prior art date
Application number
PCT/CN2023/087378
Other languages
English (en)
French (fr)
Inventor
秦乐
姜明
张孟俊
闫禄平
张晨
常原
吴俊涛
Original Assignee
北京车和家汽车科技有限公司
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Filing date
Publication date
Application filed by 北京车和家汽车科技有限公司 filed Critical 北京车和家汽车科技有限公司
Publication of WO2023202408A1 publication Critical patent/WO2023202408A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units

Definitions

  • the present application belongs to the technical field of vehicle manufacturing, and in particular relates to a rear torsion box, a lower body and a vehicle.
  • the lower body as the most important force-bearing structure on the body, bears the impact force from frontal and side collisions, and the torsion box is a very important part of this frame.
  • a front torsion box and a rear torsion box can be respectively provided at the front and rear ends of the front floor assembly of the lower body. In this way, the vehicle can be strengthened to resist stress during a collision. To cope with the stresses produced during a collision.
  • Embodiments of the present application provide a rear torsion box, a lower body and a vehicle.
  • the rear torsion box, lower body and vehicle provided by the present application have stronger structural strength and stronger safety performance.
  • the first aspect of the embodiment of the present application provides a rear torsion box.
  • the upper side of the lower body is the interior space of the vehicle.
  • the rear torsion box includes: a body part connected to the lower body; and a protruding part.
  • the body portion extends in a direction approaching and/or away from the interior space of the vehicle.
  • the lower body includes a cross beam extending along a first direction and a longitudinal beam extending along a second direction, the first direction intersects the second direction, and the first direction and the second direction constitute The plane intersects the extending direction of the protrusion; the first direction is the width direction of the vehicle.
  • the protruding portion protrudes from the crossbeam along its extending direction.
  • the longitudinal beam and the cross beam together form a storage space, and the storage space is used to place batteries; the protruding portion protruding from the surface of the cross beam does not exceed the bottom surface of the battery.
  • the bottom surface of the battery is a side surface of the battery on the lower body close to the vehicle suspension and wheels.
  • the extension height of the protrusion is 60 mm to 120 mm.
  • the rear torsion box is integrally formed with the longitudinal beam and the cross beam.
  • the number of longitudinal beams is two, and the two longitudinal beams are respectively arranged on the cross beam in the first direction. at both ends in the direction; the number of rear torsion boxes is two, and each longitudinal beam is connected to the cross beam through each rear torsion box.
  • the height of the protruding portion protruding from the crossbeam gradually increases from the center of the crossbeam in the first direction to the direction of the longitudinal beam; or from the center of the crossbeam in the first direction to the longitudinal direction.
  • the height of the protruding portion protruding from the crossbeam first gradually increases and then gradually decreases; or the protruding portions of the two rear torsion boxes are connected to each other.
  • the protrusion has the shape of a letter L.
  • the position range of the highest point of the protrusion is located between the rear longitudinal beam and the longitudinal beam of the vehicle along the first direction.
  • the body parts of the two rear torque boxes are connected to form an integrated structure.
  • the protruding parts of the two rear torque boxes are respectively extended from the two body parts.
  • the opposite ends of the two protruding parts Natural transition and integrated formation; or the body parts of the two rear torsion boxes are set in a split type, the two protruding parts are respectively extended from the two body parts and then connected to the cross beam, and the opposite ends of the two protruding parts naturally transition and become one body forming.
  • the rear torsion box further includes a plurality of reinforcing ribs embedded in the protruding portion, and the plurality of reinforcing ribs are staggered in the protruding portion.
  • a second aspect of the present application provides a lower body, including a front floor assembly and a rear torsion box connection as in any of the previous embodiments provided at one end of the front floor assembly.
  • a third aspect of the present application provides a vehicle, including a lower body as described above.
  • the present application provides a rear torsion box.
  • the rear torsion box includes a body part connected to the lower body and a protruding part extending from the body part in a direction approaching and/or away from the vehicle interior space, that is, increasing the rear torsion force.
  • the height of the box below the body allows it to generate stronger resistance stress in the event of a vehicle collision to resist external impact forces and has higher safety performance.
  • This application also provides a lower body. Since the lower body includes the rear torsion box of the aforementioned technical solution, the lower body can generate stronger resistance stress when the vehicle collides and has higher safety performance.
  • This application also provides a vehicle. Since the vehicle includes the lower body of the aforementioned technical solution, the vehicle has higher safety performance.
  • Figure 1 is a schematic cross-sectional structural diagram of a rear torsion box provided by an embodiment of the present application
  • Figure 2 is a schematic three-dimensional structural diagram of a rear torsion box in the lower body provided by an embodiment of the present application.
  • 100 rear torsion box; 10, body part; 20, protruding part; 30, reinforcing rib; 1000, lower body; 11, cross beam; 12, longitudinal beam; 1, first direction; 2, third Two directions; 101, storage space.
  • the front torsion box originally provided on the front cabin assembly and the front torsion box originally provided on the rear cabin assembly can be installed in the lower body
  • the rear torsion box is integrated into the front floor assembly to make the front floor assembly and the front and rear torsion boxes more integrated.
  • sufficient resistance stress can be generated to resist external impact.
  • the inventor designed a rear torsion box after in-depth research. By increasing the height of the rear torsion box itself under the lower body, it can When the vehicle collides, it will generate stronger resistive stress to resist external impact force and have higher safety performance.
  • the rear torsion box, lower body and vehicle disclosed in the embodiments of the present application can be applied to, but are not limited to, electric vehicles, and can also be applied to new energy vehicles such as hydrogen energy vehicles and fuel vehicles.
  • new energy vehicles such as hydrogen energy vehicles and fuel vehicles.
  • the following description takes the vehicle as an electric vehicle as an example.
  • Figure 1 is a schematic cross-sectional structural diagram of a rear torsion box provided by an embodiment of the present application
  • Figure 2 is a schematic three-dimensional structural diagram of a rear torsion box provided by an embodiment of the present application in a lower body.
  • FIG. 1 Please refer to Figures 1 and 2 in conjunction.
  • Some embodiments of the present application provide a rear torsion box 100, which is connected to the lower body 1000.
  • the upper side of the lower body 1000 is the interior space of the vehicle.
  • the rear torsion box 100 includes a
  • the lower body 1000 includes a body portion 10 and a protruding portion 20 extending from the body portion 10 in a direction approaching and/or away from the vehicle interior space.
  • the rear torsion box 100 is a structure in the lower body 1000 used to transmit force.
  • the rear torsion box 100 has to withstand a huge impact force from the outside and transmit the impact force downward to the cross beam connected to it in the lower body. , longitudinal beams and other components are transferred, To generate counter-stress to resist the impact force and ensure the integrity of the vehicle.
  • the body part 10 is oriented in a direction close to the vehicle interior space, that is, the body part 10 is oriented in a direction close to the vehicle body in the height direction of the lower body 1000 , that is, the protruding part 20 can extend toward the interior of the vehicle body; the body part 10 is oriented away from the vehicle interior space.
  • direction, that is, the body portion 10 faces the direction close to the suspension and wheels in the height direction of the lower body 1000, that is, the protruding portion 20 can extend in the direction of the suspension and wheels.
  • the protruding portion 20 in order to prevent the protruding portion 20 from occupying the space inside the vehicle body and affecting the installation of the vehicle control system and the driving system, the protruding portion 20 preferably extends in a direction away from the interior space of the vehicle.
  • the arrangement of the protruding portion 20 increases the height of the rear torsion box 100 on the lower body 1000 , thereby strengthening the structural strength of the rear torsion box 100 so that it can generate greater resistance stress when responding to side collisions, thereby compensating for The vehicle's side impact performance is insufficient.
  • the rear torsion box 100 is configured to include a body portion 10 connected to the lower body 1000 and a protruding portion 20 extending from the body portion 10 in a direction approaching and/or away from the vehicle interior space. , that is, the height of the rear torsion box 100 in the height direction of the lower body 1000 is increased, so that it can generate stronger resistance stress to resist external impact force when the vehicle collides, and has higher safety performance.
  • the lower body 1000 includes a cross beam 11 extending along a first direction 1 and a longitudinal beam 12 extending along a second direction 2.
  • the first direction 1 intersects the second direction 2, and the first direction 1 intersects the second direction 2.
  • the plane formed by 1 and the second direction 2 intersects the extending direction of the protruding portion 20 .
  • the first direction 1 and the second direction 2 are arranged to intersect, so that the cross beam 11 and the longitudinal beam 12 intersect and form a lower body structure such as a rectangle, a trapezoid, etc.
  • the first direction 1 refers to the width direction of the vehicle
  • the second direction 2 refers to the traveling direction of the vehicle, including the forward or backward direction.
  • the cross beam 11 extends along the first direction 1, and the longitudinal beam 12 extends along the second direction 2.
  • the cross beam 11 and the longitudinal beam 12 can be integrally formed into a rectangular structure. In the height direction of the vehicle, the upper portions of the cross beam 11 and the longitudinal beam 12 are connected to the vehicle body, and the lower portion of the cross beam 11 is connected to the vehicle's suspension and wheels.
  • the protruding portion 20 is disposed protruding from the cross beam 11 along its extending direction. In order to ensure the extension amount of the rear torque box 100, the rear torque box 100 can obtain sufficient height improvement.
  • the rear torsion box 100 can be connected between the longitudinal beam 12 and the cross beam 11 and be integrally provided with the longitudinal beam 12 and the cross beam 11 . That is to say, the rear torsion box 100 originally installed in the rear cabin assembly of the lower body 1000 is integrated into the front floor assembly of the lower body 1000. Since the front floor assembly is the main structure of the vehicle in a side collision, it is arranged in this way , which can further increase the vehicle's side impact performance.
  • the rear torsion box 100, the cross beam 11 and the longitudinal beam 12 can be integrally formed using a casting process. Such arrangement can greatly improve the convenience of manufacturing and improve production efficiency; the rear torsion box 100, The cross beam 11 and the longitudinal beam 12 can also be formed using an integrated die-casting process to ensure the machining accuracy of each component; at the same time, the rear torsion box 100, the cross beam 11 and the longitudinal beam 12 can also be processed by using the entire blank to remove material by turning, milling, etc.
  • the processing method forms an integral structure, and those skilled in the art can choose a method in which the rear torsion box 100, the cross beam 11 and the longitudinal beam 12 are integrally formed according to the actual situation.
  • the rear torsion box 100, the cross member 11 and the longitudinal member 12 can be made of aluminum alloy.
  • the alloy can enable the lower body 1000 to absorb the energy brought by the impact force by crushing and deforming when it is subjected to an impact force, which is beneficial to improving the safety performance of the lower body 1000 .
  • the longitudinal beam 12 and the cross beam 11 together form a storage space 101, and the storage space 101 is used to place batteries; the protruding portion 20 protrudes from the surface of the cross beam 11 and does not exceed the bottom surface of the battery.
  • the storage space 101 can also be used not only for placing batteries, but also for placing the driving system and control system of the vehicle.
  • the bottom surface of the battery is the surface of the side of the battery on the lower body 1000 close to the vehicle suspension and wheels.
  • the strength of the rear torsion box 100 can be improved without reducing the ground clearance of the lower body 1000, thereby improving the safety of vehicle operation. performance and reliability.
  • the protruding portion 20 may be configured to protrude from the surface of the cross beam 11 and be flush with the bottom surface of the battery.
  • the extension height of the protrusion 20 is 60mm-120mm.
  • the extension height of the protruding portion 20 is set to 60mm-120mm, which can take into account the strength of the rear torsion box 100 and the ground clearance of the lower body 1000, making the overall comprehensive performance more superior. .
  • the rear torsion box 100 may be configured to be integrally formed with the longitudinal beam 12 and the cross beam 11 .
  • the structural integrity of the front floor assembly in the lower body 1000 is further strengthened and the strength is higher, thereby improving reliability and safety.
  • the number of longitudinal beams 12 is two, and the two longitudinal beams 12 are respectively disposed at both ends of the cross beam 11 in the first direction 1; the number of rear torsion boxes 100 is two, each The longitudinal beams 12 are connected to the cross beams 11 through respective rear torsion boxes 100 .
  • both ends of the cross member 11 in the first direction 1 are connected to the longitudinal beam 12 through rear torsion boxes 100 respectively.
  • the arrangement of the two rear torsion boxes 100 further improves the safety of the front floor assembly 100 performance
  • the number of longitudinal beams 12 can also be set to three, four, five, etc., to strengthen the structural strength of the front floor assembly 100 in the second direction 2. According to choose according to actual situation.
  • the height of the protrusion 20 protruding from the crossbeam 11 gradually increases.
  • the center of the crossbeam 11 in the first direction 1 refers to the midpoint of the crossbeam 11 in its own length direction.
  • the direction from the center of the cross beam 11 in the first direction 1 to the longitudinal beam 12 can also be understood as the direction from the midpoint of the cross beam 11 in its own length direction to both ends.
  • the height of the protruding portion 20 protruding from the cross beam 11 gradually increases, which means that the surface of the protruding portion 20 away from the main body portion 21 has a certain slope. It can be understood that the protruding portion 20 has the highest height near the longitudinal beam 12 , so that the protruding portion 20 can withstand the huge impact force generated when the vehicle collides sideways, and can generate sufficient counter-stress to resist this impact. Impact force; the protruding portion 20 has the smallest height at the part away from the longitudinal beam 12, which can save material costs, reduce vehicle weight, and save vehicle space.
  • the height change of the protruding portion 20 may first increase and then decrease. That is to say, the protruding portion 20 is at a height close to the center of the beam 11 The change is large, and at the end close to the longitudinal beam 12, the height change tends to be gentle. In this way, the protruding part 20 forms a posture similar to the letter "L", which further improves the performance of the protruding part 20 in resisting side collisions.
  • the protruding portion 20 protruding from the cross beam 11 first gradually increases, and then Gradually decreases. That is, there is a distance between the “highest point” of the protruding portion 20 and the longitudinal beam 12. The farther the “highest point” is from the longitudinal beam 12, the better the effect of resisting side impact force. In some embodiments, the position of the "highest point” in the first direction 1 does not exceed the corresponding position of the rear longitudinal beam of the vehicle. By controlling the distance between the highest point and the longitudinal beam 12, the lower body 1000 of different models can be adapted to achieve greater reliability.
  • the position range of the highest point of the protrusion 20 is located between the rear longitudinal beam and the longitudinal beam of the vehicle along the first direction 1 .
  • the protrusions 20 of the two rear torsion boxes 100 are connected to each other.
  • the body parts 21 of the two rear torsion boxes 100 may also be arranged to be connected to each other.
  • the protruding parts 20 of the two rear torque boxes 100 are respectively extended from the two body parts 21, and the two protrusions The opposite ends of the portion 20 transition naturally and are integrally formed.
  • the body parts 21 of the two rear torsion boxes 100 can also be arranged in a split type.
  • the two protruding parts 20 are respectively extended from the two body parts 21 and then connected to the cross beam 11.
  • the two protruding parts 20 are connected to the cross beam 11.
  • the opposite ends of the portion 20 transition naturally and are integrally formed.
  • the two protruding parts 20 are connected to each other, which can further increase the integration degree of the lower body 1000 .
  • the impact force can be transmitted over a wider range through the two protrusions 20 , allowing more components in the front floor assembly 100 to jointly resist the impact force, further improving the safety of the lower body 1000 and reliability.
  • the rear torsion box 100 further includes a plurality of reinforcing ribs 30 embedded in the protruding portion 20 , and the plurality of reinforcing ribs 30 are staggeredly arranged in the protruding portion 20 .
  • the reinforcing ribs 30 can be in the shape of steel bars, plates or blocks.
  • the reinforcing ribs 30 are used to increase the structural strength of the protruding portion 20. Since the reinforcing ribs 30 are staggered in the protruding portion 20, when a collision occurs, the multiple reinforcing ribs 30 interact with each other to prevent the protruding portion 20 from being damaged too much. The deformation and displacement improve the structural stability of the front floor assembly 100.
  • the reinforcing ribs 30 can be embedded in the protruding portion 20 or can be exposed.
  • the lower body 1000 includes a front floor assembly and a rear torsion box 100 connection provided at one end of the front floor assembly as provided in any of the previous embodiments.
  • the lower body 1000 includes the rear torsion box 100 of the aforementioned technical solution, the lower body 1000 can generate stronger resistance stress when the vehicle collides and has higher safety performance.
  • Some embodiments of the present application also provide a vehicle that includes the lower body 1000 provided by the foregoing embodiments, and the vehicle has higher safety performance.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

一种后扭力盒（100），连接于下车体（1000），下车体（1000）的上侧为车辆内部空间；后扭力盒（100）包括连接于下车体（1000）的本体部（10）及自本体部（10）向靠近和/或背离车辆内部空间的方向延伸形成的凸出部（20）。该后扭力盒可以在车辆发生碰撞时产生更强的对抗应力，具有更高的安全性能。还公开了一种包括后扭力盒的下车体（1000）以及一种包括下车体的车辆。

Description

后扭力盒、下车体及车辆
相关申请的交叉引用
本申请基于申请号为202220879702.1、申请日为2022年04月17日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请属于车辆制造技术领域，尤其涉及一种后扭力盒、下车体及车辆。
背景技术
随着车辆的日益普及，人们对车辆安全性的要求也就越来越高。
下车体，作为车身上最重要的受力结构，承受来自正碰及侧碰来的冲击力，而扭力盒是这个框架中非常重要的一部分。
在相关技术中的下车体中，为了增加车辆在碰撞产生时的对抗应力，可以在下车体的前地板总成的前后两端分别设置前扭力盒与后扭力盒，如此，可以强化车辆在应对碰撞时产生的对抗应力。
然而，相关技术中的后扭力盒的结构强度仍然不够，在应对侧面碰撞时，能够产生的对抗应力有限，安全性能存在缺陷。
发明内容
本申请实施例提供了一种后扭力盒、下车体及车辆，本申请提供的后扭力盒、下车体及车辆能够结构强度，安全性能更强。
本申请实施例的第一方面提供了一种后扭力盒，下车体的上侧为车辆内部空间，后扭力盒包括：连接于下车体的本体部；及凸出部，凸出部自本体部向靠近和/或背离车辆内部空间的方向延伸形成。
根据本申请第一方面的一些实施例，下车体包括沿第一方向延伸的横梁和沿第二方向延伸的纵梁，第一方向与第二方向相交，且第一方向与第二方向构成的平面与凸出部的延伸方向相交；第一方向为车辆的宽度方向。
根据本申请第一方面的一些实施例，凸出部沿其延伸方向凸出于横梁设置。
根据本申请第一方面的一些实施例，纵梁与横梁共同围成置物空间，置物空间用于放置电池；凸出部凸出于横梁的表面不超出电池的底表面。
根据本申请第一方面的一些实施例，电池的底表面为电池在下车体上靠近车辆悬挂与车轮的一侧表面。
根据本申请第一方面的一些实施例，凸出部的延伸高度为60mm至120mm。
根据本申请第一方面的一些实施例，后扭力盒与纵梁及横梁一体成型设置。
根据本申请第一方面的一些实施例，纵梁的个数为两个，两个纵梁分设于横梁在第一方 向的两端；后扭力盒的个数为两个，各纵梁分别通过各后扭力盒连接于横梁。
根据本申请第一方面的一些实施例，由横梁在第一方向上的中心至纵梁的方向，凸出部凸出于横梁的高度逐渐增加；或由横梁在第一方向上的中心至纵梁的方向，凸出部凸出于横梁的高度先逐渐增加，再逐渐降低；或两个后扭力盒的凸出部相互连接。
根据本申请第一方面的一些实施例，凸出部具有字母L的形状。
根据本申请第一方面的一些实施例，凸出部的最高点的位置范围，沿第一方向位于车辆的后纵梁和纵梁之间。
根据本申请第一方面的一些实施例，两个后扭力盒的本体部连接呈一体结构，两个后扭力盒的凸出部分别自两个本体部延伸形成，两个凸出部的相对端自然过渡并一体成型；或者两个后扭力盒的本体部为分体式设置，两个凸出部分别自两个本体部延伸形成后与横梁连接，两个凸出部的相对端自然过渡并一体成型。
根据本申请第一方面的一些实施例，后扭力盒还包括嵌设于凸出部内的多个加强筋，多个加强筋在凸出部内交错设置。
本申请的第二方面提供了一种下车体，包括前地板总成及设置于前地板总成一端的如前述任一实施例的后扭力盒连接。
本申请的第三方面提供了一种车辆，包括如前述的下车体。
本申请提供了一种后扭力盒，该后扭力盒包括连接于下车体的本体部及自本体部向靠近和/或背离车辆内部空间的方向延伸形成的凸出部，即增加了后扭力盒在下车体的高度，使其能够在车辆发生碰撞时产生更强的对抗应力，以对抗外部冲击力，具有更高的安全性能。
本申请还提供了一种下车体，由于该下车体包括前述技术方案的后扭力盒，该下车体能够在车辆发生碰撞时产生更强的对抗应力，具有更高的安全性能。
本申请还提供了一种车辆，由于该车辆包括前述技术方案的下车体，该车辆具有更高的安全性能。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请实施例提供的一种后扭力盒的剖面结构示意图；
图2是本申请实施例提供的一种后扭力盒在下车体中的立体结构示意图。
附图中：100、后扭力盒；10、本体部；20、凸出部；30、加强筋；1000、下车体；11、横梁；12、纵梁；1、第一方向；2、第二方向；101、置物空间。
具体实施方式
为了能够更清楚地理解本公开的上述目的、特征和优点，下面将对本公开的方案进行进一步描述。需要说明的是，在不冲突的情况下，本公开的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本公开，但本公开还可以采用其他不同于在此描述的方式来实施；显然，说明书中的实施例只是本公开的一部分实施例，而不是全部的实施例。
需要说明的是，在本文中，诸如“第一”和“第二”等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
随着车辆的日益普及，人们对车辆安全性能的要求也就越来越高。
发明人注意到，在相关技术中的车辆中，为了增加车辆在碰撞发生时的对抗应力，可以在下车体中将原本设置在前机舱总成的前扭力盒以及原本设置在后机舱总成上的后扭力盒集成至前地板总成，以使得前地板总成与前后扭力盒的整体性更强，在发生正面碰撞(追尾或被追尾)时，能够产生足够的对抗应力以抵抗外部冲击。
然而，在车辆发生侧面碰撞时，由于后扭力盒自身的结构强度仍然不够，且不像正面碰撞时存在前机舱总成与后机舱总成的缓冲，在应对侧面碰撞时能够产生的对抗应力有限，前地板总成容易发生形变甚至解体，具有一定的安全隐患。
基于上述考虑，为了提高前地板总成在受到侧面碰撞时产生的对抗应力，发明人经过深入研究设计了一种后扭力盒，通过增加后扭力盒自身的在下车体的高度，使其能够在车辆发生碰撞时产生更强的对抗应力，以对抗外部冲击力，具有更高的安全性能。
本申请实施例公开的后扭力盒、下车体及车辆可以但不限应用于电动汽车，还可以应用于氢能源汽车等新能源汽车以及燃油汽车等。下面以车辆为电动汽车为例进行说明。
下面对本申请具体实施方式所提供的后扭力盒、下车体及车辆的技术方案进行进一步说明。
图1是本申请实施例提供的一种后扭力盒的剖面结构示意图；图2是本申请实施例提供的一种后扭力盒在下车体中的立体结构示意图。
请结合参阅图1与图2，本申请的一些实施例提供了一种后扭力盒100，连接于下车体1000，下车体1000的上侧为车辆内部空间，后扭力盒100包括连接于下车体1000的本体部10及自本体部10向靠近和/或背离车辆内部空间的方向延伸形成的凸出部20。
后扭力盒100为下车体1000中用于传导作用力的结构，当车辆发生碰撞时，后扭力盒100要承受外部的巨大冲击力，并将该冲击力向下车体中与其连接的横梁、纵梁等构件传递， 以产生用于抵抗该冲击力的对抗应力，保证车辆的整体性。
本体部10朝向靠近车辆内部空间的方向，即为本体部10在下车体1000的高度方向上朝向靠近车身的方向，也即凸出部20可以向车身内部延伸；本体部10朝向远离车辆内部空间的方向，即为本体部10在下车体1000的高度方向上朝向靠近悬挂及车轮的方向，也即凸出部20可以向悬挂与车轮的方向延伸。
但为了避免凸出部20占用车身内部的空间，影响车辆控制系统以及驱动系统的安装，凸出部20优选地朝向远离车辆内部空间的方向延伸。
凸出部20的设置，增加了后扭力盒100在下车体1000的高度，进而强化了后扭力盒100的自身结构强度，使其在应对侧面碰撞时，能够产生更大的对抗应力，从而弥补了车辆侧面碰撞性能不足的缺陷。
在本申请提供的上述实施例中，通过设置后扭力盒100包括连接于下车体1000的本体部10及自本体部10向靠近和/或背离车辆内部空间的方向延伸形成的凸出部20，即增加了后扭力盒100在下车体1000高度方向上的高度，使其能够在车辆发生碰撞时产生更强的对抗应力，以对抗外部冲击力，具有更高的安全性能。
在本申请的一些实施例中，下车体1000包括沿第一方向1延伸的横梁11和沿第二方向2延伸的纵梁12，第一方向1与第二方向2相交，且第一方向1与第二方向2构成的平面与凸出部20的延伸方向相交。
第一方向1和第二方向2相交设置，使得横梁11与纵梁12相交并可形成诸如矩形、梯形等形状的下车体结构。示例性地，在本实施例中，第一方向1是指车辆的宽度方向，第二方向2是指车辆的行驶方向，包括前进或后退方向。
横梁11沿第一方向1延伸，纵梁12沿第二方向2延伸，横梁11与纵梁12可以一体成型为矩形结构。在车辆的高度方向上，横梁11与纵梁12的上方连接车辆的车身，横梁11的下方连接车辆的悬挂与车轮。
在本申请的一些实施例中，凸出部20沿其延伸方向凸出于横梁11设置。以保证后扭力盒100的延伸量，使后扭力盒100获得足够的高度提升。
在本申请的一些实施例中，可以将后扭力盒100连接于纵梁12与横梁11之间，并与纵梁12及横梁11一体设置。也即将原本设置于下车体1000的后机舱总成中的后扭力盒100，集成至下车体1000的前地板总成上，由于前地板总成为车辆在侧面碰撞时的主体结构，如此设置，可以进一步增加车辆的侧碰性能。
在本申请的这些实施例中，后扭力盒100、横梁11与纵梁12可以采用铸造工艺一体成型制成，如此设置，可以极大地提高制造的便利性，提高生产效率；后扭力盒100、横梁11与纵梁12还可以采用一体压铸工艺成型，以确保各构件的加工精度；同时，后扭力盒100、横梁11与纵梁12还可以通过利用整块坯料采用车削、铣削等去除材料的加工方式形成一个整体结构，本领域技术人员可以根据实际情况选择后扭力盒100、横梁11与纵梁12一体成型的方式。
在本申请的一些实施例中，后扭力盒100、横梁11与纵梁12可以采用铝合金制成，铝 合金能够使下车体1000在受到冲击力时通过溃缩变形来吸收冲击力带来的能量，有利于提高该下车体1000的安全性能。
在本申请的一些实施例中，纵梁12与横梁11共同围成置物空间101，置物空间101用于放置电池；凸出部20凸出于横梁11的表面不超出电池的底表面。
当然，置物空间101也可以不止用于放置电池，也可以用于放置车辆的驱动系统与控制系统。
电池的底表面，为电池在下车体1000上靠近车辆悬挂与车轮的一侧表面。在本申请的这些实施例中，通过控制凸出部20的延伸尺寸，能够在提升了后扭力盒100的自身强度的同时，不缩减下车体1000的离地间隙，提升了车辆运行的安全性与可靠性。
在本申请的一些实施例中，可以设置凸出部20凸出于横梁11的表面与电池的底表面平齐。
在本申请的一些实施例中，凸出部20的延伸高度为60mm-120mm。
在本申请的这些实施例中，将凸出部20的延伸高度设置为60mm-120mm，可以兼顾后扭力盒100的自身强度以及下车体1000的离地间隙，使得整体的综合性能更为优越。
在本申请的一些实施例中，可以设置后扭力盒100与纵梁12及横梁11一体成型设置。通过设置后扭力盒100与纵梁12及横梁11一体成型，进一步加强了下车体1000中前地板总成结构的一体性，强度更高，进而能够提升可靠性与安全性。
在本申请的一些实施例中，纵梁12的个数为两个，两个纵梁12分别设置于横梁11在第一方向1的两端；后扭力盒100的个数为两个，各纵梁12分别通过各后扭力盒100连接于横梁11。
在本申请的这些实施例中，横梁11在第一方向1的两端分别通过后扭力盒100与纵梁12连接，两个后扭力盒100的设置，进一步提升了前地板总成100的安全性能
同时，在本申请的一些实施例中，纵梁12的个数也可以设置为三个、四个、五个等，以强化前地板总成100在第二方向2上的结构强度，可以根据实际情况进行选择。
在本申请的一些实施例中，沿横梁11在第一方向1上的中心至纵梁12的方向，凸出部20凸出于横梁11的高度逐渐增加。
横梁11在第一方向1上的中心，指的是横梁11在其自身长度方向上的中点。由横梁11在第一方向1上的中心至纵梁12的方向，也可以理解为由横梁11在其自身长度方向上的中点向两端的方向。
凸出部20凸出于横梁11的高度逐渐增加，指的是凸出部20背离本体部21的表面具有一定的坡度。可以理解的是，凸出部20在靠近纵梁12的部分高度最大，如此，使得凸出部20能够承受车辆发生侧碰时产生的巨大冲击力，并能够产生足够的对抗应力来对抗这股冲击力；凸出部20在远离纵梁12的部分高度最小，可以节省材料成本、减轻车辆重量、节约车辆空间。
在本申请的这些实施例中，沿横梁11在第一方向1上的中心至纵梁12的方向，凸出部20的高度变化可以先增大再减小。也就是说，凸出部20在靠近横梁11中心的部分，高度 变化较大，在靠近纵梁12的一端，高度变化趋于平缓。如此，使得凸出部20形成类似于字母“L”的姿态，进一步提升了凸出部20在对抗侧面碰撞时的性能。
同时，在本申请的一些实施例中，也可以设置沿横梁11在第一方向1上的中心至纵梁12的方向，凸出部20凸出于所述横梁11的高度先逐渐增加，再逐渐降低。即凸出部20的“最高点”与纵梁12之间存在距离，当该“最高点”距离纵梁12越远时，抗侧碰冲击力的效果越好。在一些实施例中，该“最高点”在第一方向1上的位置，不超过车辆后纵梁的对应位置。通过控制该最高点与纵梁12之间的距离，可以适配不同型号的下车体1000，可靠性更强。
在本申请的一些实施例中，凸出部20的最高点的位置范围，沿第一方向1位于车辆的后纵梁和纵梁之间。
在本申请的一些实施例中，两个后扭力盒100的凸出部20相互连接。相应地，也可以设置两个后扭力盒100的本体部21相互连接。
在本申请的这些实施例中，可以设置两个后扭力盒100的本体部21连接呈一体结构后，两个后扭力盒100的凸出部20分别自两本体部21延伸形成，两凸出部20的相对端自然过渡并一体成型。
在本申请的一些实施例中，也可以设置两个后扭力盒100的本体部21为分体式设置，两个凸出部20分别自两本体部21延伸形成后与横梁11连接，两凸出部20的相对端自然过渡并一体成型。
在本申请的这些实施例中，两凸出部20相互连接，能够进一步增加下车体1000的一体化程度。当车辆发生侧面碰撞时，冲击力可通过两凸出部20进行更大范围的传导，进而使得前地板总成100中的更多部件共同抵抗冲击力，进一步提升了下车体1000的安全性与可靠性。
在本申请的一些实施例中，后扭力盒100还包括嵌设于凸出部20内的多个加强筋30，多个加强筋30在凸出部20内交错设置。
加强筋30可以呈钢筋状、板状或块状。加强筋30用于增加凸出部20的结构强度，由于加强筋30在凸出部20内交错设置，在碰撞发生时，多个加强筋30相互作用，能够避免凸出部20发生太大的形变与位移，提升了前地板总成100的结构稳定性。
在本申请的一些实施例中，加强筋30可以嵌设于凸出部20内，也可以呈裸露状态。
本申请的一些实施例还提供了一种下车体1000，下车体1000包括前地板总成及设置于前地板总成一端的如前述任一实施例提供的后扭力盒100连接。
由于该下车体1000包括前述技术方案的后扭力盒100，该下车体1000能够在车辆发生碰撞时产生更强的对抗应力，具有更高的安全性能。
本申请的一些实施例还提供了一种车辆，该车辆包括前述实施例提供的下车体1000，该车辆具有更高的安全性能。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以 对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (15)

  1. 一种后扭力盒，连接于下车体，所述下车体的上侧为车辆内部空间，其中，所述后扭力盒包括：
    连接于所述下车体的本体部；及
    凸出部，所述凸出部自所述本体部向靠近和/或背离所述车辆内部空间的方向延伸形成。
  2. 如权利要求1所述的后扭力盒，其中，所述下车体包括沿第一方向延伸的横梁和沿第二方向延伸的纵梁，所述第一方向与所述第二方向相交，且所述第一方向与所述第二方向构成的平面与所述凸出部的延伸方向相交；
    所述第一方向为车辆的宽度方向。
  3. 如权利要求2所述的后扭力盒，其中，所述凸出部沿其延伸方向凸出于所述横梁设置。
  4. 如权利要求3所述的后扭力盒，其中，所述纵梁与所述横梁共同围成置物空间，所述置物空间用于放置电池；
    所述凸出部凸出于所述横梁的表面不超出所述电池的底表面。
  5. 如权利要求4所述的后扭力盒，其中，所述电池的底表面为所述电池在所述下车体上靠近车辆悬挂与车轮的一侧表面。
  6. 如权利要求2或3所述的后扭力盒，其中，所述凸出部的延伸高度为60mm至120mm。
  7. 如权利要求2或3所述的后扭力盒，其中，所述后扭力盒与所述纵梁及所述横梁一体成型设置。
  8. 如权利要求2所述的后扭力盒，其中，
    所述纵梁的个数为两个，两个所述纵梁分设于所述横梁在所述第一方向的两端；
    所述后扭力盒的个数为两个，各所述纵梁分别通过各所述后扭力盒连接于所述横梁。
  9. 如权利要求8所述的后扭力盒，其中，
    由所述横梁在所述第一方向上的中心至所述纵梁的方向，所述凸出部凸出于所述横梁的高度逐渐增加；或
    由所述横梁在所述第一方向上的中点至所述纵梁的方向，所述凸出部凸出于所述横梁的高度先逐渐增加，再逐渐降低；或
    两个所述后扭力盒的所述凸出部相互连接。
  10. 如权利要求9所述的后扭力盒，其中，所述凸出部具有字母L的形状。
  11. 如权利要求9所述的后扭力盒，其中，所述凸出部的最高点的位置范围，沿所述第一方向位于所述车辆的后纵梁和所述纵梁之间。
  12. 如权利要求9所述的后扭力盒，其中，两个所述后扭力盒的所述本体部连接呈一体结构，两个所述后扭力盒的所述凸出部分别自两个所述本体部延伸形成，两个所述凸出部的相对端自然过渡并一体成型；或者
    两个所述后扭力盒的所述本体部为分体式设置，两个所述凸出部分别自两个所述本体部延伸形成后与所述横梁连接，两个所述凸出部的相对端自然过渡并一体成型。
  13. 如权利要求1所述的后扭力盒，其中，所述后扭力盒还包括嵌设于所述凸出部内的多个加强筋，多个所述加强筋在所述凸出部内交错设置。
  14. 一种下车体，其中，包括前地板总成及设置于所述前地板总成一端的、如权利要求1-13任一所述的后扭力盒连接。
  15. 一种车辆，其中，包括如权利要求14所述的下车体。
PCT/CN2023/087378 2022-04-17 2023-04-10 后扭力盒、下车体及车辆 WO2023202408A1 (zh)

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