WO2024011998A1 - Integrated cross-shaped hydroformed crash box structure for electric vehicle subframe - Google Patents
Integrated cross-shaped hydroformed crash box structure for electric vehicle subframe Download PDFInfo
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- WO2024011998A1 WO2024011998A1 PCT/CN2023/089957 CN2023089957W WO2024011998A1 WO 2024011998 A1 WO2024011998 A1 WO 2024011998A1 CN 2023089957 W CN2023089957 W CN 2023089957W WO 2024011998 A1 WO2024011998 A1 WO 2024011998A1
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- absorbing box
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- 238000010521 absorption reaction Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 20
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000003466 welding Methods 0.000 description 24
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000003698 laser cutting Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- 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
Definitions
- the invention belongs to the technical field of passenger car chassis parts, and specifically relates to an integrated cross-shaped internal high-pressure forming energy-absorbing box structure of an electric vehicle subframe.
- the automobile energy-absorbing box is usually installed between the front bumper anti-collision beam and the front longitudinal beam of the body.
- the weight of the entire electric vehicle is heavier than that of traditional vehicles, and it is becoming more and more popular.
- Many electric vehicles require the front subframe to participate in the collision, and the energy absorbing box is also set on the front subframe beam to further increase collision safety; the energy absorbing box exists as a passive safety protection system.
- the impact-absorbing box effectively absorbs collision energy, effectively protects the safety of passengers in the car, and minimizes damage to the powertrain and body in the front cabin caused by the impact force.
- the energy-absorbing box not only improves the passive safety of the car, but also reduces the repair costs caused by impact. Therefore, energy-absorbing boxes are usually required to have high energy absorption, high crushing deformation stability, lightweight and low cost; however, traditional energy-absorbing boxes currently have the following problems:
- the steel energy-absorbing box has a square cross-section, and there are four main energy-absorbing and force-transmitting paths on it, respectively at its four corners, such as L1′-L4′ in Figure 4.
- the aspect ratio of the square cross-section is usually set to 1 : 1;
- the collision energy absorption is generally improved by increasing the material thickness, the length of the energy-absorbing box or the cross-sectional circumference, but there are problems of heavy weight and high cost;
- the steel energy-absorbing box adopts a stamping and welding structure, and the welding overlap is 14 times (double material thickness, welding heat shadow Due to the manufacturing process, the crushing shape is irregular and the deformation consistency is poor, which affects the smoothness of the collision deformation of the entire vehicle.
- the present invention provides an integrated cross-shaped internal high-pressure forming energy-absorbing box structure for the subframe of an electric vehicle, which can achieve high collision energy absorption and high collision deformation stability of parts while being low-cost and lightweight. Quantitative advantages.
- An integrated cross-shaped inner high-pressure forming energy-absorbing box structure for an electric vehicle subframe including a cross-shaped inner high-pressure forming energy-absorbing box 1 and an inner high-pressure forming energy-absorbing box cover 2.
- the cross-shaped inner high-pressure forming energy-absorbing box The box 1 is an integral piece with a cross-shaped closed cross-section structure.
- the upper and lower end surfaces of the high-pressure-formed energy-absorbing box 1 are respectively provided with a first boss 4 and a second boss 5.
- the left and right end faces are respectively provided with third bosses 6 and fourth bosses 7; the two ends of the bosses of the first boss 4, the second boss 5, the third boss 6 and the fourth boss 7 are respectively provided with There are rounded corners, and there are also rounded corners at the intersection of every two adjacent bosses, so there are a total of 12 rounded corners L1-L12, thus forming 12 main energy-absorbing and force-transmitting paths.
- the L1-L12 fillet radius is 1.5 times the material thickness.
- the cross-shaped inner high-pressure forming energy-absorbing box 1 has a transverse width and longitudinal height ratio of 1:1.2.
- the cross-shaped inner high-pressure forming energy-absorbing box 1 is respectively provided with three first concave ribs 8 on the upper end surface of the first boss 4 and the lower end surface of the second boss 5; on the left end surface of the third boss 6 and Three convex ribs 10 are respectively provided on the right end surface of the fourth boss 7; six second concave ribs 9 are respectively provided on the upper end surface of the third boss 6 and the lower end surface of the fourth boss 7.
- the depth of the first concave rib 8 and the second concave rib 9 is set to 1.25 times the material thickness, and the height of the convex rib 10 is the same as the depth of the first concave rib 8 and the second concave rib 9 .
- the maximum circumferential change rate of the cross-shaped inner high-pressure forming energy-absorbing box 1 along the central axis is approximately 8%.
- the cross-shaped internal high-pressure forming energy-absorbing box has a cross-shaped closed cross-section structure.
- a total of 4 bosses are provided on the upper, lower and left and right end surfaces of the main body of the energy-absorbing box; each boss is provided at the intersection of the plane and the vertical surface.
- the rounded corners form 12 main energy-absorbing and force-transmitting paths; while traditional square energy-absorbing boxes usually have 4 main energy-absorbing and force-transmitting paths.
- the cross-section energy-absorbing box compared with the traditional square-section energy-absorbing box, absorbs about 15%-25% more collision energy, effectively reducing the intrusion of the powertrain into the passenger compartment, protecting the safety of the occupants, and at the same time reducing the impact on the electric motors and motors in the front cabin. Damage to the reducer and body is reduced, reducing maintenance costs.
- the cross-shaped internal high-pressure forming energy-absorbing box adopts the internal high-pressure forming process. Compared with the punch-welded structure energy-absorbing box, there is no super hard area caused by the fastening and welding overlap (double material thickness, welding heat influence); in addition
- the above-mentioned reasonable convex and concave ribs are provided on the upper and lower end faces and the left and right end faces of the cross-shaped surface as collision induction ribs, so that the cross-shaped inner high-pressure forming structure energy-absorbing box can be crushed step by step during collision energy absorption, and the crushing shape is regular. And the consistency is good, thus improving the stability of the vehicle's deformation posture.
- the cross-shaped internal high-pressure forming energy-absorbing box adopts the internal high-pressure forming process, and the cross-shaped cross-section design, draft angle, and rounded corners are reasonably set, making it have good manufacturability; the production of the cross-shaped internal high-pressure forming energy-absorbing box
- the process is: fixed-length welded pipe, internal high pressure forming, saw cutting or laser cutting. For example, if it is produced on a common work surface of 2400mm*1600mm in small and medium-sized internal high-pressure forming equipment, it can produce at least twelve pieces per mold, with high production efficiency and a material utilization rate of over 95%; while ordinary stamping and welding structure energy-absorbing boxes generally Using one mold and two parts for production, the material utilization rate is usually about 70-80%.
- the energy-absorbing box can achieve a cost reduction of 15%-20% and a weight reduction of about 4%-6%.
- Figure 1 is a schematic structural diagram of the cross-shaped internal high-pressure forming energy-absorbing box of the present invention.
- Figure 2 is a schematic diagram of the main energy-absorbing path of the cross-shaped internal high-pressure forming energy-absorbing box of the present invention.
- Figure 3 is a schematic diagram of the usage state of the present invention.
- Figure 4 is a schematic diagram of an energy-absorbing box with a stamping and welding structure in the prior art.
- Figure 5 is a schematic diagram of the production status of the cross-shaped internal high-pressure forming energy-absorbing box with multiple pieces in one mold (twelve pieces in one mold) according to the present invention.
- cross-shaped inner high-pressure forming energy-absorbing box 1 inner higher-formed structure energy-absorbing box cover 2, front subframe assembly 3, first boss 4, second boss 5, third boss 6,
- connection should be understood in a broad sense.
- it can be a fixed connection, a detachable connection, or an integral body.
- It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements.
- the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
- the term “above” or “below” a first feature of a second feature may include direct contact between the first and second features, or may also include the first and second features. Not in direct contact but through additional characteristic contact between them.
- the terms “above”, “above” and “above” a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature.
- “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.
- an electric vehicle subframe integrated cross-shaped inner high-pressure forming energy-absorbing box structure includes a cross-shaped inner high-pressure forming energy-absorbing box 1 and an inner high-pressure forming energy-absorbing box cover 2;
- the cross-shaped inner high-pressure forming energy-absorbing box 1 is a one-piece piece, which has a cross-shaped closed cross-section structure; the upper and lower end surfaces of the cross-shaped inner high-pressure forming energy-absorbing box 1 are respectively provided with a first boss 4 and a second boss 5.
- the left and right end faces of the cross-shaped inner high-pressure forming energy-absorbing box 1 are respectively provided with a third boss 6 and a fourth boss 7; among which the first boss 4, the second boss 5, the third boss 6 and the fourth boss 7
- There are rounded corners at both ends of the bulge and there are rounded corners at the intersection of every two adjacent bulges. Therefore, there are 12 rounded corners L1-L12 in total, thus forming 12 main energy-absorbing and power-transmitting lines. path.
- the cross-shaped internal high-pressure forming energy-absorbing box has a radius of 1.5 times the material thickness of the 12 main energy-absorbing and force-transmitting paths (L1-L12).
- the material thickness refers to the cross-shaped internal high-pressure forming energy-absorbing box 1. The thickness of the material.
- the lateral width and longitudinal height ratio of the cross-shaped inner high-pressure forming energy-absorbing box 1 is 1:1.2, that is, the distance between the top surface of the first boss 4 above and the bottom surface of the second boss 5 below is Boss 6 left The ratio of the distance between the end face and the right end face of the fourth boss 7 on the right side.
- the cross-shaped inner high-pressure forming energy-absorbing box 1 is provided with three first concave ribs 8 on the upper and lower end surfaces of the first boss 4 and the second boss 5 respectively; on the left and right end surfaces of the third boss 6 and the fourth boss 7 Three convex ribs 10 are respectively provided on the top; six second concave ribs 9 are respectively provided on the upper and lower end surfaces of the third boss 6 and the fourth boss 7.
- the depth of the concave ribs 8 and 9 is set to 1.25 times the material thickness, and the height of the convex rib 10 is the same as the depth of the first concave rib 8 and the second concave rib 9 .
- the maximum circumferential change rate of the cross-shaped inner high-pressure forming energy-absorbing box 1 along the central axis is approximately 8%.
- the cross-shaped inner high-pressure forming energy-absorbing box 1 is welded to the front cross member of the front subframe assembly 3, and the inner high-pressure forming energy-absorbing box cover 2 is welded to the cross-shaped inner high-pressure forming absorbing box.
- a cross-shaped inner high-pressure forming energy-absorbing box structure is integrated into the subframe of an electric vehicle.
- the energy-absorbing box has a cross-shaped closed cross-section structure and includes a cross-shaped inner high-pressure forming energy-absorbing box 1 and an inner high-pressure forming energy absorbing box.
- the energy-absorbing box cover 2; the cross-shaped inner high-pressure forming energy-absorbing box 1 is welded to the front cross member of the front subframe assembly 3, and the inner high-pressure forming energy-absorbing box cover 2 is welded to the cross-shaped inner high-pressure forming energy-absorbing box 1 Front face.
- the cross-section of the cross-shaped inner high-pressure forming energy-absorbing box 1 is a cross-shaped closed section, and a total of 4 bosses are provided on the upper, lower, left and right end surfaces of the cross-shaped inner high-pressure forming energy-absorbing box 1; on the plane and vertical surfaces of each boss Fillets are set at the intersection, and the inner fillets are set to 1.5 times the material thickness, thus forming 12 main energy-absorbing and force-transmitting paths; the cross-section aspect ratio of the cross-shaped internal high-pressure forming energy-absorbing box 1 is set to approximately 1:1.2; Compared with the traditional square cross-section energy-absorbing box, it absorbs about 15%-25% more collision energy, effectively reducing the intrusion of the powertrain into the passenger compartment, protecting the safety of the passengers, and at the same time reducing damage to the motor, reducer and body in the front cabin, reducing Maintenance costs.
- the cross-shaped inner high-pressure forming energy-absorbing box 1 is provided with three concave ribs 8 on the upper and lower end surfaces of the first boss 4 and the second boss 5 respectively; on the left and right end faces of the third boss 6 and the fourth boss 7 respectively Three convex ribs 10 are provided; six concave ribs 9 are respectively provided on the upper and lower end surfaces of the third boss 6 and the fourth boss 7; the depths of the concave ribs 8 and 9 are The degree is set to 1.25 times the material thickness, and the height of the convex ribs 10 is the same as the depth of the concave ribs 8 and 9; the maximum circumferential change rate of the cross-shaped inner high-pressure forming energy-absorbing box 1 along the central axis is about 8%.
- the structure of the cross-shaped internal high-pressure forming energy-absorbing box 1 adopts the internal high-pressure forming process, and the cross-section design has good manufacturability; draft angles are set on the left and right end bosses of the cross-shaped internal high-pressure forming energy-absorbing box 1.
- the mold is disposed on symmetrical horizontal planes on the upper and lower end faces, and symmetrical draft angles and parting fillets are set on the parting line 11; compared with the stamping and welding structure energy-absorbing box, there is no fastening and welding overlap 14 (double material thickness, welding Thermal influence); in addition, the above-mentioned reasonable convex ribs and concave ribs are provided on the upper and lower end faces and the left and right end faces of the cross-shaped surface as collision induction ribs, so that the cross-shaped inner high-pressure forming energy-absorbing box 1 can absorb energy during a collision.
- the crushing is carried out step by step, and the crushing shape is regular and consistent, thereby improving the stability of the vehicle's deformation posture.
- the production process of the cross-shaped internal high-pressure forming energy-absorbing box 1 is: fixed-length welded pipe, internal high-pressure forming, and cutting (saw cutting or laser cutting).
- 15 is the supplementary process of the internal high-pressure forming shaft end, and 16 is saw cutting. Or laser cutting position. It is produced on a common work surface of 2400mm*1600mm in small and medium-sized high-pressure forming equipment, which can achieve at least twelve pieces of one mold.
- the production efficiency is high, and the material utilization rate can be as high as 95%.
- ordinary stamping and welding structure energy-absorbing boxes are generally used One mold and two parts are produced to achieve low cost and lightweight requirements, and the material utilization rate is usually about 70-80%.
- the internal high-pressure forming mold is used to produce multiple pieces, which also saves the cost of the stamping parts fastening and overlapping welding process, the investment in welding tooling and the welding overlapping weight; the cross-shaped internal high-pressure forming energy-absorbing box 1. Produced using an internal high-pressure forming process. Compared with the energy-absorbing box with a stamped and welded structure, the cost is reduced by 15-20% and the weight is reduced by about 4-6%.
- any combination of various embodiments of the present invention can also be carried out. As long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.
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Abstract
The present invention relates to the technical field of passenger vehicle chassis parts, and in particular to an integrated cross-shaped hydroformed crash box structure for an electric vehicle subframe. The structure comprises a cross-shaped hydroformed crash box and a hydroformed crash box cover plate; the cross-shaped hydroformed crash box is an integrated piece and is of a cross-shaped closed cross-section structure; a first boss and a second boss are respectively provided on the upper end surface and the lower end surface of a crash box body, and a third boss and a fourth boss are respectively provided on the left end surface and the right end surface of the crash box body; and a total of twelve rounded corners are provided at joints of adjacent bosses on the crash box body, so as to form twelve main energy-absorbing and force-transmitting paths. According to the present invention, high collision energy absorption and high collision deformation stability of parts can be achieved, and meanwhile the advantages of low cost and light weight are achieved.
Description
本发明属于乘用车底盘零件技术领域，具体涉及一种电动车副车架集成式十字型内高压成形吸能盒结构。The invention belongs to the technical field of passenger car chassis parts, and specifically relates to an integrated cross-shaped internal high-pressure forming energy-absorbing box structure of an electric vehicle subframe.
汽车吸能盒作为汽车被动安全系统中重要的吸能装置，通常其安装在前保险杠防撞梁和车身前纵梁之间；电动车整车重量相比传统车重量更大，越来越多的电动车要求前副车架参与碰撞，将吸能盒同时设置在前副车架横梁上，从而进一步增加碰撞安全性；吸能盒作为一种被动安全保护系统而存在，车辆在发生碰撞时吸能盒有效吸收碰撞能量，有效保护车内乘客的安全、并尽可能减小撞击力对前机舱内动力总成及车身的损伤。As an important energy-absorbing device in the automobile passive safety system, the automobile energy-absorbing box is usually installed between the front bumper anti-collision beam and the front longitudinal beam of the body. The weight of the entire electric vehicle is heavier than that of traditional vehicles, and it is becoming more and more popular. Many electric vehicles require the front subframe to participate in the collision, and the energy absorbing box is also set on the front subframe beam to further increase collision safety; the energy absorbing box exists as a passive safety protection system. When the vehicle collides, The impact-absorbing box effectively absorbs collision energy, effectively protects the safety of passengers in the car, and minimizes damage to the powertrain and body in the front cabin caused by the impact force.
综上所述，吸能盒既提高了汽车的被动安全性，又降低了撞击带来的维修成本。故通常要求吸能盒具有高吸能性、高压溃变形稳定性、轻量化以及低成本的特点；然而传统吸能盒，目前存在以下问题：To sum up, the energy-absorbing box not only improves the passive safety of the car, but also reduces the repair costs caused by impact. Therefore, energy-absorbing boxes are usually required to have high energy absorption, high crushing deformation stability, lightweight and low cost; however, traditional energy-absorbing boxes currently have the following problems:
1.铝合金材质吸能盒，其轻量化效果有所提升，但是铝合金材料相比钢质材料成本较高，另外由于铝合金材料与钢质材料弹性模量特性关系，铝合金吸能盒吸收能量偏低；1. The lightweight effect of aluminum alloy energy-absorbing boxes has been improved, but the cost of aluminum alloy materials is higher than steel materials. In addition, due to the elastic modulus characteristics of aluminum alloy materials and steel materials, aluminum alloy energy-absorbing boxes The absorbed energy is low;
2.通常钢质吸能盒为方形截面，其上设有四条主吸能传力路径，分别在其四角处，如图4上的L1′-L4′，方形截面高宽比通常设置为1：1；为了增了吸能性，一般通过增加料厚、增加吸能盒长度或者截面周长来提升碰撞吸能性，但是存在重量大、成本高的问题；2. Usually the steel energy-absorbing box has a square cross-section, and there are four main energy-absorbing and force-transmitting paths on it, respectively at its four corners, such as L1′-L4′ in Figure 4. The aspect ratio of the square cross-section is usually set to 1 : 1; In order to increase the energy absorption, the collision energy absorption is generally improved by increasing the material thickness, the length of the energy-absorbing box or the cross-sectional circumference, but there are problems of heavy weight and high cost;
3.通常钢质吸能盒采用冲焊结构，扣合焊接搭边14(双倍料厚、焊接热影
响)产生过硬区域，由于制造工艺原因导致在碰撞时压溃形态不规则、变形一致性差，影响了整车碰撞变形平稳性。3. Usually the steel energy-absorbing box adopts a stamping and welding structure, and the welding overlap is 14 times (double material thickness, welding heat shadow Due to the manufacturing process, the crushing shape is irregular and the deformation consistency is poor, which affects the smoothness of the collision deformation of the entire vehicle.
发明内容Contents of the invention
为了克服上述问题，本发明提供一种电动车副车架集成式十字型内高压成形吸能盒结构，能够实现零件的高碰撞吸能性、高碰撞变形稳定性，同时兼具低成本和轻量化的优点。In order to overcome the above problems, the present invention provides an integrated cross-shaped internal high-pressure forming energy-absorbing box structure for the subframe of an electric vehicle, which can achieve high collision energy absorption and high collision deformation stability of parts while being low-cost and lightweight. Quantitative advantages.
一种电动车副车架集成式十字型内高压成形吸能盒结构，包括十字型内高压成形吸能盒1和内高压成形吸能盒盖板2，所述的十字型内高压成形吸能盒1为一体件，其呈十字型封闭截面结构，在十字型内高压成形吸能盒1上下端面分别设有第一凸台4和第二凸台5，在十字型内高压成形吸能盒1左右端面分别设有第三凸台6和第四凸台7；其中第一凸台4、第二凸台5、第三凸台6和第四凸台7的凸起处两端分别设有圆角，且每两个相邻凸台的交接处也设有圆角，故设有L1-L12总计12个圆角，从而形成12条主吸能传力路径。An integrated cross-shaped inner high-pressure forming energy-absorbing box structure for an electric vehicle subframe, including a cross-shaped inner high-pressure forming energy-absorbing box 1 and an inner high-pressure forming energy-absorbing box cover 2. The cross-shaped inner high-pressure forming energy-absorbing box The box 1 is an integral piece with a cross-shaped closed cross-section structure. The upper and lower end surfaces of the high-pressure-formed energy-absorbing box 1 are respectively provided with a first boss 4 and a second boss 5. The high-pressure-formed energy-absorbing box in the cross-shaped 1. The left and right end faces are respectively provided with third bosses 6 and fourth bosses 7; the two ends of the bosses of the first boss 4, the second boss 5, the third boss 6 and the fourth boss 7 are respectively provided with There are rounded corners, and there are also rounded corners at the intersection of every two adjacent bosses, so there are a total of 12 rounded corners L1-L12, thus forming 12 main energy-absorbing and force-transmitting paths.
所述L1-L12圆角半径均为1.5倍料厚。The L1-L12 fillet radius is 1.5 times the material thickness.
所述十字型内高压成形吸能盒1横向宽度和纵向高度比为1：1.2。The cross-shaped inner high-pressure forming energy-absorbing box 1 has a transverse width and longitudinal height ratio of 1:1.2.
所述十字型内高压成形吸能盒1在第一凸台4的上端面和第二凸台5的下端面上分别设有三条第一凹筋8；在第三凸台6的左端面和第四凸台7的右端面上分别设三条凸筋10；在第三凸台6的上端面和第四凸台7的下端面上分别设有六条第二凹筋9。The cross-shaped inner high-pressure forming energy-absorbing box 1 is respectively provided with three first concave ribs 8 on the upper end surface of the first boss 4 and the lower end surface of the second boss 5; on the left end surface of the third boss 6 and Three convex ribs 10 are respectively provided on the right end surface of the fourth boss 7; six second concave ribs 9 are respectively provided on the upper end surface of the third boss 6 and the lower end surface of the fourth boss 7.
所述第一凹筋8和第二凹筋9的深度设置为1.25倍料厚，且凸筋10高度与第一凹筋8和第二凹筋9的深度相同。The depth of the first concave rib 8 and the second concave rib 9 is set to 1.25 times the material thickness, and the height of the convex rib 10 is the same as the depth of the first concave rib 8 and the second concave rib 9 .
所述十字型内高压成形吸能盒1沿中心轴线截面最大周长变化率约为8％。The maximum circumferential change rate of the cross-shaped inner high-pressure forming energy-absorbing box 1 along the central axis is approximately 8%.
本发明的有益效果：
Beneficial effects of the present invention:
1.所述十字型内高压成形吸能盒，其呈十字型封闭截面结构，在吸能盒主体上下和左右端面总计设置4面凸台；在每个凸台的平面和垂面相交处设置圆角，从而形成了12条主吸能传力路径；而传统方形吸能盒，通常设置4条主吸能传力路径。十字型截面吸能盒，相比传统方形截面吸能盒，吸收碰撞能量增加约15％-25％，有效减少动力总成对乘员舱的侵入，保护乘员安全，同时减少对前机舱内电动机、减速器、车身的损伤，降低维修成本。1. The cross-shaped internal high-pressure forming energy-absorbing box has a cross-shaped closed cross-section structure. A total of 4 bosses are provided on the upper, lower and left and right end surfaces of the main body of the energy-absorbing box; each boss is provided at the intersection of the plane and the vertical surface. The rounded corners form 12 main energy-absorbing and force-transmitting paths; while traditional square energy-absorbing boxes usually have 4 main energy-absorbing and force-transmitting paths. The cross-section energy-absorbing box, compared with the traditional square-section energy-absorbing box, absorbs about 15%-25% more collision energy, effectively reducing the intrusion of the powertrain into the passenger compartment, protecting the safety of the occupants, and at the same time reducing the impact on the electric motors and motors in the front cabin. Damage to the reducer and body is reduced, reducing maintenance costs.
2.所述十字型内高压成形吸能盒，采用内高压成形工艺，相比冲焊结构吸能盒，无扣合焊接搭边(双倍料厚、焊接热影响)产生的过硬区域；另外在其十字型面上下端面和左右端面上设置上述合理的凸筋、凹筋作为碰撞诱导筋，使得十字型内高压成形结构吸能盒在碰撞吸能时能逐级压溃，压溃形态规则且一致性好，从而提升了整车变形姿态的平稳性。2. The cross-shaped internal high-pressure forming energy-absorbing box adopts the internal high-pressure forming process. Compared with the punch-welded structure energy-absorbing box, there is no super hard area caused by the fastening and welding overlap (double material thickness, welding heat influence); in addition The above-mentioned reasonable convex and concave ribs are provided on the upper and lower end faces and the left and right end faces of the cross-shaped surface as collision induction ribs, so that the cross-shaped inner high-pressure forming structure energy-absorbing box can be crushed step by step during collision energy absorption, and the crushing shape is regular. And the consistency is good, thus improving the stability of the vehicle's deformation posture.
3.所述十字型内高压成形吸能盒，采用内高压成形工艺，十字型截面设计、拔模角、圆角合理设置，使得其具备良好的制造性；十字型内高压成形吸能盒生产工序为：定长焊管、内高压成形、锯切割或激光切割。如在中小型内高压成形设备常见工作台面2400mm*1600mm上生产，可至少实现一模十二件生产，生产效率高，材料利用率可高达95％以上；而普通冲焊结构吸能盒，一般采用一模双件生产，材料利用率通常约70-80％左右。相比冲焊结构吸能盒，采用内高压成形一模多件生产，还省去了冲压件扣合搭边焊接工序成本、焊接工装投资及焊接搭边重量；综上，十字型内高压成形吸能盒，相比冲焊结构吸能盒，实现成本降低15％-20％，实现减重约4％-6％。3. The cross-shaped internal high-pressure forming energy-absorbing box adopts the internal high-pressure forming process, and the cross-shaped cross-section design, draft angle, and rounded corners are reasonably set, making it have good manufacturability; the production of the cross-shaped internal high-pressure forming energy-absorbing box The process is: fixed-length welded pipe, internal high pressure forming, saw cutting or laser cutting. For example, if it is produced on a common work surface of 2400mm*1600mm in small and medium-sized internal high-pressure forming equipment, it can produce at least twelve pieces per mold, with high production efficiency and a material utilization rate of over 95%; while ordinary stamping and welding structure energy-absorbing boxes generally Using one mold and two parts for production, the material utilization rate is usually about 70-80%. Compared with the stamping and welding structure energy-absorbing box, internal high-pressure forming is used to produce multiple parts in one mold, which also saves the cost of the stamping parts fastening and overlapping welding process, the investment in welding tooling and the weight of the welding overlapping; in summary, cross-shaped internal high-pressure forming Compared with the energy-absorbing box with stamping and welding structure, the energy-absorbing box can achieve a cost reduction of 15%-20% and a weight reduction of about 4%-6%.
为了更清楚地说明本发明实施例中的技术方案，下面将对本发明实施例描述中所要使用的附图作简单的介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，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，还可以根据本发明实施例的内容和这些附图获得其他的附图。In order to explain the technical solutions in the embodiments of the present invention more clearly, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in this field, before doing any creative work, By the way, other drawings can also be obtained based on the contents of the embodiments of the present invention and these drawings.
图1为本发明的十字型内高压成形吸能盒结构示意图。Figure 1 is a schematic structural diagram of the cross-shaped internal high-pressure forming energy-absorbing box of the present invention.
图2为本发明的十字型内高压成形吸能盒主吸能路径示意图。Figure 2 is a schematic diagram of the main energy-absorbing path of the cross-shaped internal high-pressure forming energy-absorbing box of the present invention.
图3为本发明的使用状态示意图。Figure 3 is a schematic diagram of the usage state of the present invention.
图4为现有技术中冲焊结构吸能盒示意图。Figure 4 is a schematic diagram of an energy-absorbing box with a stamping and welding structure in the prior art.
图5为本发明一模多件(一模十二件)十字型内高压成形吸能盒生产状态示意图。Figure 5 is a schematic diagram of the production status of the cross-shaped internal high-pressure forming energy-absorbing box with multiple pieces in one mold (twelve pieces in one mold) according to the present invention.
其中：十字型内高压成形吸能盒1、内高于成形结构吸能盒盖板2、前副车架总成3、第一凸台4、第二凸台5、第三凸台6、第四凸台7、第一凹筋8、第二凹筋9、凸筋10、分模圆角11、现有冲焊结构吸能盒12、现有冲焊结构吸能盒盖板13、扣合焊接搭边14、L1-L12共12个圆角、现有冲焊结构吸能盒主吸能传力路径L1′-L4′、内高压成型轴端工艺补充15、锯切割或激光切割位置16。Among them: cross-shaped inner high-pressure forming energy-absorbing box 1, inner higher-formed structure energy-absorbing box cover 2, front subframe assembly 3, first boss 4, second boss 5, third boss 6, The fourth boss 7, the first concave rib 8, the second concave rib 9, the convex rib 10, the parting fillet 11, the existing stamping and welding structure energy absorbing box 12, the existing stamping and welding structure energy absorbing box cover 13, Fastening and welding overlap 14, 12 rounded corners L1-L12 in total, existing stamping and welding structure energy-absorbing box main energy-absorbing force transmission path L1′-L4′, internal high-pressure forming shaft end process supplement 15, saw cutting or laser cutting Location 16.
下面结合附图和实施例对本发明作进一步的详细说明。可以理解的是，此处所描述的具体实施例仅仅用于解释本发明，而非对本发明的限定。另外还需要说明的是，为了便于描述，附图中仅示出了与本发明相关的部分而非全部结构。The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. It can be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for convenience of description, only some but not all structures related to the present invention are shown in the drawings.
在本发明的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、“固定”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
In the description of the present invention, unless otherwise clearly stated and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body. ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
在本发明中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。In the present invention, unless otherwise expressly provided and limited, the term "above" or "below" a first feature of a second feature may include direct contact between the first and second features, or may also include the first and second features. Not in direct contact but through additional characteristic contact between them. Furthermore, the terms "above", "above" and "above" a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature. “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.
在本实施例的描述中，术语“上”、“下”、“左”、“右”等方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述和简化操作，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”仅仅用于在描述上加以区分，并没有特殊的含义。In the description of this embodiment, the terms "upper", "lower", "left", "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplified operation. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore is not to be construed as a limitation of the invention. In addition, the terms "first" and "second" are only used for descriptive purposes and have no special meaning.
实施例1Example 1
如图1-2所示，一种电动车副车架集成式十字型内高压成形吸能盒结构，包括十字型内高压成形吸能盒1和内高压成形吸能盒盖板2；所述的十字型内高压成形吸能盒1为一体件，其呈十字型封闭截面结构；在十字型内高压成形吸能盒1上下端面分别设有第一凸台4和第二凸台5，在十字型内高压成形吸能盒1左右端面分别设有第三凸台6和第四凸台7；其中第一凸台4、第二凸台5、第三凸台6和第四凸台7的凸起处两端分别设有圆角，且每两个相邻凸台的交接处也设有圆角，故设有L1-L12总计12个圆角，从而形成12条主吸能传力路径。As shown in Figure 1-2, an electric vehicle subframe integrated cross-shaped inner high-pressure forming energy-absorbing box structure includes a cross-shaped inner high-pressure forming energy-absorbing box 1 and an inner high-pressure forming energy-absorbing box cover 2; The cross-shaped inner high-pressure forming energy-absorbing box 1 is a one-piece piece, which has a cross-shaped closed cross-section structure; the upper and lower end surfaces of the cross-shaped inner high-pressure forming energy-absorbing box 1 are respectively provided with a first boss 4 and a second boss 5. The left and right end faces of the cross-shaped inner high-pressure forming energy-absorbing box 1 are respectively provided with a third boss 6 and a fourth boss 7; among which the first boss 4, the second boss 5, the third boss 6 and the fourth boss 7 There are rounded corners at both ends of the bulge, and there are rounded corners at the intersection of every two adjacent bulges. Therefore, there are 12 rounded corners L1-L12 in total, thus forming 12 main energy-absorbing and power-transmitting lines. path.
所述十字型内高压成形吸能盒，其上12条主吸能传力路径(L1-L12)圆角半径均为1.5倍料厚，料厚是指十字型内高压成形吸能盒1所用材料的厚度。The cross-shaped internal high-pressure forming energy-absorbing box has a radius of 1.5 times the material thickness of the 12 main energy-absorbing and force-transmitting paths (L1-L12). The material thickness refers to the cross-shaped internal high-pressure forming energy-absorbing box 1. The thickness of the material.
所述十字型内高压成形吸能盒1横向宽度和纵向高度比为1：1.2，即上方的第一凸台4顶面距离下方第二凸台5底面之间的距离与左侧的第三凸台6左
端面距离右侧的第四凸台7右端面之间的距离之比。The lateral width and longitudinal height ratio of the cross-shaped inner high-pressure forming energy-absorbing box 1 is 1:1.2, that is, the distance between the top surface of the first boss 4 above and the bottom surface of the second boss 5 below is Boss 6 left The ratio of the distance between the end face and the right end face of the fourth boss 7 on the right side.
所述十字型内高压成形吸能盒1在第一凸台4和第二凸台5上下端面上分别设有三条第一凹筋8；在第三凸台6和第四凸台7左右端面上分别设三条凸筋10；在第三凸台6和第四凸台7上下端面上分别设有六条第二凹筋9。The cross-shaped inner high-pressure forming energy-absorbing box 1 is provided with three first concave ribs 8 on the upper and lower end surfaces of the first boss 4 and the second boss 5 respectively; on the left and right end surfaces of the third boss 6 and the fourth boss 7 Three convex ribs 10 are respectively provided on the top; six second concave ribs 9 are respectively provided on the upper and lower end surfaces of the third boss 6 and the fourth boss 7.
所述凹筋8和9的深度设置为1.25倍料厚，且凸筋10高度与第一凹筋8和第二凹筋9深度相同。The depth of the concave ribs 8 and 9 is set to 1.25 times the material thickness, and the height of the convex rib 10 is the same as the depth of the first concave rib 8 and the second concave rib 9 .
所述十字型内高压成形吸能盒1沿中心轴线截面最大周长变化率约为8％。The maximum circumferential change rate of the cross-shaped inner high-pressure forming energy-absorbing box 1 along the central axis is approximately 8%.
如图3所示，使用时，将十字型内高压成形吸能盒1焊接在前副车架总成3的前横梁上，内高压成形吸能盒盖板2焊接在十字型内高压成形吸能盒1前端面。As shown in Figure 3, when in use, the cross-shaped inner high-pressure forming energy-absorbing box 1 is welded to the front cross member of the front subframe assembly 3, and the inner high-pressure forming energy-absorbing box cover 2 is welded to the cross-shaped inner high-pressure forming absorbing box. The front face of energy box 1.
实施例2Example 2
参阅图1-图2，一种电动车副车架集成式十字型内高压成形吸能盒结构，吸能盒呈十字型封闭截面结构，包括十字型内高压成形吸能盒1、内高压成形吸能盒盖板2；十字型内高压成形吸能盒1焊接在前副车架总成3的前横梁上，内高压成形吸能盒盖板2焊接在十字型内高压成形吸能盒1前端面。Referring to Figures 1 and 2, a cross-shaped inner high-pressure forming energy-absorbing box structure is integrated into the subframe of an electric vehicle. The energy-absorbing box has a cross-shaped closed cross-section structure and includes a cross-shaped inner high-pressure forming energy-absorbing box 1 and an inner high-pressure forming energy absorbing box. The energy-absorbing box cover 2; the cross-shaped inner high-pressure forming energy-absorbing box 1 is welded to the front cross member of the front subframe assembly 3, and the inner high-pressure forming energy-absorbing box cover 2 is welded to the cross-shaped inner high-pressure forming energy-absorbing box 1 Front face.
所述十字型内高压成形吸能盒1的截面呈十字型封闭截面，在十字型内高压成形吸能盒1上下和左右端面总计设置4面凸台；在每个凸台的平面和垂面相交处设置圆角，内圆角设置为1.5倍料厚，从而形成了12条主吸能传力路径；十字型内高压成形吸能盒1的截面高宽比设置约为1：1.2；相比传统方形截面吸能盒，吸收碰撞能量增加约15％-25％，有效减少动力总成对乘员舱的侵入，保护乘员安全，同时减少对前机舱内电动机、减速器、车身的损伤，降低维修成本。The cross-section of the cross-shaped inner high-pressure forming energy-absorbing box 1 is a cross-shaped closed section, and a total of 4 bosses are provided on the upper, lower, left and right end surfaces of the cross-shaped inner high-pressure forming energy-absorbing box 1; on the plane and vertical surfaces of each boss Fillets are set at the intersection, and the inner fillets are set to 1.5 times the material thickness, thus forming 12 main energy-absorbing and force-transmitting paths; the cross-section aspect ratio of the cross-shaped internal high-pressure forming energy-absorbing box 1 is set to approximately 1:1.2; Compared with the traditional square cross-section energy-absorbing box, it absorbs about 15%-25% more collision energy, effectively reducing the intrusion of the powertrain into the passenger compartment, protecting the safety of the passengers, and at the same time reducing damage to the motor, reducer and body in the front cabin, reducing Maintenance costs.
所述十字型内高压成形吸能盒1在第一凸台4和第二凸台5上下端面上分别设有三条凹筋8；在第三凸台6和第四凸台7左右端面上分别设三条凸筋10；在第三凸台6和第四凸台7上下端面上分别设有六条凹筋9；凹筋8和9的深
度设置为1.25倍料厚，且凸筋10高度与凹筋8和9深度相同；十字型内高压成形吸能盒1沿中心轴线截面最大周长变化率约为8％。The cross-shaped inner high-pressure forming energy-absorbing box 1 is provided with three concave ribs 8 on the upper and lower end surfaces of the first boss 4 and the second boss 5 respectively; on the left and right end faces of the third boss 6 and the fourth boss 7 respectively Three convex ribs 10 are provided; six concave ribs 9 are respectively provided on the upper and lower end surfaces of the third boss 6 and the fourth boss 7; the depths of the concave ribs 8 and 9 are The degree is set to 1.25 times the material thickness, and the height of the convex ribs 10 is the same as the depth of the concave ribs 8 and 9; the maximum circumferential change rate of the cross-shaped inner high-pressure forming energy-absorbing box 1 along the central axis is about 8%.
所述十字型内高压成形吸能盒1的结构，采用内高压成形工艺，十字型截面设计具备良好的制造性；在十字型内高压成形吸能盒1左右端面凸台上设置拔模角，并在上下端面对称水平面处分模，并在分模线上设置对称拔模角和分模圆角11；相比冲焊结构吸能盒，无扣合焊接搭边14(双倍料厚、焊接热影响)导致的过硬区域；另外在其十字型面上下端面和左右端面上设置上述合理的凸筋、凹筋作为碰撞诱导筋，使得十字型内高压成形吸能盒1在碰撞吸能时能逐级压溃，压溃形态规则且一致性好，从而提升了整车变形姿态的平稳性。The structure of the cross-shaped internal high-pressure forming energy-absorbing box 1 adopts the internal high-pressure forming process, and the cross-section design has good manufacturability; draft angles are set on the left and right end bosses of the cross-shaped internal high-pressure forming energy-absorbing box 1. And the mold is disposed on symmetrical horizontal planes on the upper and lower end faces, and symmetrical draft angles and parting fillets are set on the parting line 11; compared with the stamping and welding structure energy-absorbing box, there is no fastening and welding overlap 14 (double material thickness, welding Thermal influence); in addition, the above-mentioned reasonable convex ribs and concave ribs are provided on the upper and lower end faces and the left and right end faces of the cross-shaped surface as collision induction ribs, so that the cross-shaped inner high-pressure forming energy-absorbing box 1 can absorb energy during a collision. The crushing is carried out step by step, and the crushing shape is regular and consistent, thereby improving the stability of the vehicle's deformation posture.
如图5所示，十字型内高压成形吸能盒1生产工序为：定长焊管、内高压成形、切割(锯切割或激光切割)，15为内高压成形轴端工艺补充，16为锯切割或激光切割位置。在中小型内高压成形设备常见工作台面2400mm*1600mm上生产，可至少实现一模十二件生产，生产效率高，材料利用率可高达95％以上；而普通冲焊结构吸能盒，一般采用一模双件生产，从而实现低成本、轻量化要求，材料利用率通常约70-80％左右。As shown in Figure 5, the production process of the cross-shaped internal high-pressure forming energy-absorbing box 1 is: fixed-length welded pipe, internal high-pressure forming, and cutting (saw cutting or laser cutting). 15 is the supplementary process of the internal high-pressure forming shaft end, and 16 is saw cutting. Or laser cutting position. It is produced on a common work surface of 2400mm*1600mm in small and medium-sized high-pressure forming equipment, which can achieve at least twelve pieces of one mold. The production efficiency is high, and the material utilization rate can be as high as 95%. However, ordinary stamping and welding structure energy-absorbing boxes are generally used One mold and two parts are produced to achieve low cost and lightweight requirements, and the material utilization rate is usually about 70-80%.
相比冲焊结构吸能盒，采用内高压成形一模多件生产，还省去了冲压件扣合搭边焊接工序成本、焊接工装投资及焊接搭边重量；十字型内高压成形吸能盒1采用内高压成形工艺生产，相比冲焊结构吸能盒，实现成本降低15-20％，实现减重约4-6％。Compared with the stamping and welding structure energy-absorbing box, the internal high-pressure forming mold is used to produce multiple pieces, which also saves the cost of the stamping parts fastening and overlapping welding process, the investment in welding tooling and the welding overlapping weight; the cross-shaped internal high-pressure forming energy-absorbing box 1. Produced using an internal high-pressure forming process. Compared with the energy-absorbing box with a stamped and welded structure, the cost is reduced by 15-20% and the weight is reduced by about 4-6%.
以上结合附图详细描述了本发明的优选实施方式，但是，本发明的保护范围并不局限于上述实施方式中的具体细节，在本发明的技术构思范围内，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，这些简单变型均属于本发明的保护范围。The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the protection scope of the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, any person familiar with the technical field Within the technical scope disclosed in the present invention, equivalent substitutions or changes can be made based on the technical solutions and inventive concepts of the present invention, and these simple modifications all belong to the protection scope of the present invention.
另外需要说明的是，在上述具体实施方式中所描述的各个具体技术特征，在不矛盾的情况下，可以通过任何合适的方式进行组合，为了避免不必要的重
复，本发明对各种可能的组合方式不再另行说明。In addition, it should be noted that each specific technical feature described in the above-mentioned specific embodiments can be combined in any suitable manner unless there is any contradiction. In order to avoid unnecessary duplication, In addition, various possible combinations will not be further described in the present invention.
此外，本发明的各种不同的实施方式之间也可以进行任意组合，只要其不违背本发明的思想，其同样应当视为本发明所公开的内容。
In addition, any combination of various embodiments of the present invention can also be carried out. As long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.
Claims (6)
- 一种电动车副车架集成式十字型内高压成形吸能盒结构，其特征在于包括十字型内高压成形吸能盒(1)和内高压成形吸能盒盖板(2)，所述的十字型内高压成形吸能盒(1)为一体件，其呈十字型封闭截面结构，在十字型内高压成形吸能盒(1)上下端面分别设有第一凸台(4)和第二凸台(5)，在十字型内高压成形吸能盒(1)左右端面分别设有第三凸台(6)和第四凸台(7)；其中第一凸台(4)、第二凸台(5)、第三凸台(6)和第四凸台(7)的凸起处两端分别设有圆角，且每两个相邻凸台的交接处也设有圆角，故设有L1-L12总计共12个圆角，从而形成12条主吸能传力路径。An integrated cross-shaped inner high-pressure forming energy-absorbing box structure for an electric vehicle subframe, which is characterized by including a cross-shaped inner high-pressure forming energy-absorbing box (1) and an inner high-pressure forming energy-absorbing box cover (2). The cross-shaped inner high-pressure forming energy-absorbing box (1) is an integral piece with a cross-shaped closed cross-section structure. The upper and lower end surfaces of the cross-shaped inner high-pressure forming energy-absorbing box (1) are respectively provided with a first boss (4) and a second The boss (5) is provided with a third boss (6) and a fourth boss (7) respectively on the left and right ends of the cross-shaped high-pressure forming energy-absorbing box (1); among which the first boss (4) and the second boss (7) are respectively provided. The two ends of the bosses (5), the third boss (6) and the fourth boss (7) are respectively provided with rounded corners, and the intersection of every two adjacent bosses is also provided with rounded corners. Therefore, there are a total of 12 rounded corners L1-L12, thus forming 12 main energy absorption and force transmission paths.
- 根据权利要求1所述的一种电动车副车架集成式十字型内高压成形吸能盒结构，其特征在于L1-L12圆角半径均为1.5倍料厚。An integrated cross-shaped internal high-pressure forming energy-absorbing box structure for the subframe of an electric vehicle according to claim 1, characterized in that the radius of the L1-L12 fillets is 1.5 times the material thickness.
- 根据权利要求(1)所述的一种电动车副车架集成式十字型内高压成形吸能盒结构，其特征在于所述十字型内高压成形吸能盒(1)横向宽度和纵向高度比为1：1.2。An integrated cross-shaped internal high-pressure forming energy-absorbing box structure for an electric vehicle subframe according to claim (1), characterized in that the cross-shaped internal high-pressure forming energy-absorbing box (1) has a lateral width and a longitudinal height ratio. is 1:1.2.
- 根据权利要求1所述的一种电动车副车架集成式十字型内高压成形吸能盒结构，其特征在于所述十字型内高压成形吸能盒(1)在第一凸台(4)的上端面和第二凸台(5)的下端面上分别设有三条第一凹筋(8)；在第三凸台(6)的左端面和第四凸台(7)的右端面上分别设三条凸筋(10)；在第三凸台(6)的上端面和第四凸台(7)的下端面上分别设有六条第二凹筋(9)。An integrated cross-shaped internal high-pressure forming energy-absorbing box structure for an electric vehicle subframe according to claim 1, characterized in that the cross-shaped internal high-pressure forming energy-absorbing box (1) is located on the first boss (4) The upper end face of the third boss (6) and the lower end face of the second boss (5) are respectively provided with three first concave ribs (8); on the left end face of the third boss (6) and the right end face of the fourth boss (7) Three convex ribs (10) are respectively provided; six second concave ribs (9) are respectively provided on the upper end surface of the third boss (6) and the lower end surface of the fourth boss (7).
- 根据权利要求4所述的一种电动车副车架集成式十字型内高压成形吸能盒结构，其特征在于所述第一凹筋(8)和第二凹筋(9)的深度设置为1.25倍料厚，且凸筋(10)高度与第一凹筋(8)和第二凹筋(9)的深度相同。 An integrated cross-shaped inner high-pressure forming energy-absorbing box structure of an electric vehicle subframe according to claim 4, characterized in that the depths of the first concave ribs (8) and the second concave ribs (9) are set to 1.25 times the material thickness, and the height of the convex rib (10) is the same as the depth of the first concave rib (8) and the second concave rib (9).
- 根据权利要求1所述的一种电动车副车架集成式十字型内高压成形吸能盒结构，其特征在于所述十字型内高压成形吸能盒(1)沿中心轴线截面最大周长变化率约为8％。 An integrated cross-shaped inner high-pressure forming energy-absorbing box structure for an electric vehicle subframe according to claim 1, characterized in that the maximum circumference of the cross-shaped inner high-pressure forming energy-absorbing box (1) changes along the central axis. The rate is about 8%.
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| CN202210834429.5 | 2022-07-14 | ||
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