Die-cast roof rear cross member for vehicle

Abstract

The utility model provides a die-casting type top cover rear cross beam for a vehicle, which comprises an upper cross beam, a connecting beam and a lower cross beam which are integrally formed, the upper end of the connecting beam is connected with the upper cross beam, and the lower end of the connecting beam is connected with the lower cross beam; the two hinge mounting parts are formed on the two side parts of the lower cross beam respectively, and the thickness of the hinge mounting parts is larger than that of other parts of the top cover rear cross beam; and the first reinforcing rib is connected between the upper surface of the lower cross beam and the rear surface of the connecting beam. The thickness of the hinge mounting part is increased, and the first reinforcing ribs are arranged, so that the strength and the rigidity of the top cover rear cross beam are powerfully improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a die-casting roof rear cross beam for a vehicle. Background Art

[0002] The quality of a car is closely related to the strength and rigidity of its components. Generally speaking, the better the strength and rigidity of the car's components, the higher the quality of the car. At present, different strengthening schemes are used for components in different positions of the car.

[0003] like Figure 1 As shown, Figure 1 It is a structural schematic diagram of a rear cross beam assembly 100 of a roof cover (not shown in the figure) in the prior art, which includes an upper cross beam 110 , a lower cross beam 120 , a reinforcement 130 , and a hinge reinforcement plate 140 .

[0004] This technical solution increases the rigidity of the middle part of the rear cross beam assembly 100 by superimposing the upper cross beam 110 and the lower cross beam 120, thereby preventing the middle part of the rear cross beam assembly 100 from bending and deforming under the pressure of the top cover. Moreover, when the forces on both sides of the rear cross beam assembly 100 are different, the middle part of the rear cross beam assembly 100 may be twisted and deformed. Therefore, the superimposition of the upper cross beam 110 and the lower cross beam 120 can also increase the torsional rigidity of the rear cross beam assembly 100, thereby preventing the aforementioned twisting and deformation from occurring.

[0005] There are two reinforcement members 130, which are respectively arranged on both sides of the rear cross beam assembly 100, and each reinforcement member 130 includes an upper reinforcement plate 131 and a lower reinforcement plate 132. The upper reinforcement plate 131 is superimposed below the corner portion 111 of the upper cross beam 110, and the lower reinforcement plate 132 is superimposed below the corner portion 112 of the upper cross beam 110. The superposition of the upper reinforcement plate 131 and the corner portion 111 enhances the rigidity of the corner portion 111; the superposition of the lower reinforcement plate 132 and the corner portion 112 increases the rigidity of the corner portion 112, thereby preventing the two corner portions 111 and 112 from being easily deformed due to stress concentration.

[0006] At the same time, since the tailgate of the car (not shown in the figure) is connected to the corner portion 112 of the upper beam 110 through a hinge, in order to increase the strength of the connection and avoid cracking and deformation of the connection under the gravity of the tailgate, a hinge reinforcement plate 140 is superimposed on the position where the hinge is connected to the corner portion 112 of the upper beam 110 to further increase the strength of this position.

[0007] However, although the above technical solution can increase the strength or rigidity of the rear cross beam assembly 100, the weight of the vehicle itself is increased due to the large number of components used, thereby increasing the energy consumption of the vehicle. In addition, due to the increase in components, the assembly process of the vehicle is also more complicated, which prolongs the manufacturing cycle and increases the manufacturing cost.

[0008] Therefore, how to overcome the above-mentioned shortcomings of the prior art is a technical problem that all walks of life are eager to solve. Utility Model Content

[0009] In order to solve the above technical problems, the utility model provides a die-casting roof rear cross beam for a vehicle, which utilizes the advantages of the die-casting process to structurally strengthen part of the roof rear cross beam to reduce the use of separate reinforcement components. Under the premise of ensuring the overall strength and rigidity of the vehicle, the use of components is reduced, thereby reducing the weight of the vehicle body and thus reducing the energy consumption of the vehicle. In addition, with the reduction in the number of components, the assembly process of the vehicle is also more concise, which can shorten the manufacturing cycle.

[0010] The utility model provides a die-cast rear cross beam for a vehicle, comprising: an upper cross beam, a connecting beam, and a lower cross beam formed in one piece, wherein the upper end of the connecting beam is connected to the upper cross beam, and the lower end of the connecting beam is connected to the lower cross beam; two hinged mounting parts, respectively formed on two side parts of the lower cross beam, and the thickness of the hinged mounting parts is greater than the thickness of the remaining parts of the rear cross beam of the roof; and a first reinforcing rib, which is connected between the upper surface of the lower cross beam and the rear surface of the connecting beam.

[0011] In some embodiments, the middle portion of the rear cross beam of the top cover has a first thickness, the two side portions of the rear cross beam of the top cover have a second thickness, and the two hinged mounting portions have a third thickness, wherein the first thickness is less than the second thickness, and the second thickness is less than the third thickness.

[0012] In some embodiments, the middle portion of the upper cross beam includes a size reduction portion, the middle portion of the lower cross beam forms a size extension portion corresponding to the size reduction portion, and the connecting beam forms two transition portions at positions corresponding to both sides of the size extension portion; wherein the first reinforcing rib is formed between the two transition portions, and a second reinforcing rib intersecting with the first reinforcing rib is also formed between the two transition portions, and both ends of the second reinforcing rib are respectively connected to the two transition portions.

[0013] In some embodiments, two side portions of the lower cross beam bulge upwards respectively to form two first reinforcement structures, and a third reinforcement rib is formed between the two first reinforcement structures, and two ends of the third reinforcement rib are respectively connected to the two first reinforcement structures.

[0014] In some embodiments, the hinged mounting portion is located on the first reinforcement structure and bulges upward relative to the first reinforcement structure to form a second reinforcement structure, and a groove structure with a notch is formed on the lower surface of the lower cross beam corresponding to the position of the second reinforcement structure.

[0015] In some embodiments, it further includes: a fourth reinforcing rib, which is located on the two side portions of the rear cross beam of the top cover corresponding to the position of the hinged mounting portion; wherein the fourth reinforcing rib includes a first section and a second section connected to each other, the first section is located on the upper surface of the upper cross beam, the second section is located on the rear surface of the connecting beam, and the second section extends to the hinged mounting portion.

[0016] In some embodiments, the invention further comprises: a fifth reinforcing rib connected between the lower surface of the upper cross beam and the front surface of the connecting beam.

[0017] In some embodiments, it further includes: an annular reinforcing rib located at a position on the lower surface of the lower cross beam corresponding to the hinged mounting portion.

[0018] In some embodiments, the notch is located on a side of the groove structure close to the connecting beam; at least a portion of the fifth reinforcing rib can extend from the front surface of the connecting beam through the notch to the lower surface of the lower cross beam and intersect with the annular reinforcing rib.

[0019] In some embodiments, it further includes: a sixth reinforcing rib, which is located at the two side ends of the annular reinforcing rib and connected to the annular reinforcing rib; a seventh reinforcing rib, which is located between the two side ends of the annular reinforcing rib and connected to the annular reinforcing rib; wherein the extension direction of the sixth reinforcing rib is perpendicular to the extension direction of the seventh reinforcing rib.

[0020] In some embodiments, it further includes: a first connecting arm, which is located at two side ends of the rear cross beam of the roof cover and is used to connect the upper side beam of the vehicle; a second connecting arm, which is located at two side ends of the rear cross beam of the roof cover and is used to connect the rear pillar of the vehicle.

[0021] According to the rear cross beam of the roof provided by the utility model, by structurally reinforcing a specific portion of the rear cross beam of the roof, it is possible to have higher strength and rigidity, thereby reducing the use of components, so as to reduce the dead weight of the vehicle body while satisfying the rigidity of the vehicle body.

[0022] The device of the present invention has other characteristics and advantages, which will be obvious from the drawings and subsequent embodiments incorporated in this document, or will be described in detail in the drawings and subsequent embodiments incorporated in this document, which are used together to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a rear crossbeam assembly in the prior art;

[0024] Figure 2 It is a structural schematic diagram of the rear cross beam of the top cover provided by the utility model;

[0025] Figure 3 This is a schematic diagram of the installation structure of the rear crossbeam of the top cover provided by the utility model;

[0026] Figure 4 It is a schematic diagram of the top cover rear crossbeam provided by the utility model from a top view, wherein: Figure 4 The approximate positions of the size extension part and the size reduction part are respectively outlined with circular rectangular dotted lines;

[0027] Figure 5 The utility model is a schematic diagram of the bottom structure of the rear cross beam of the top cover.

[0028] Description of Reference Numerals

[0029] Rear beam assembly 100

[0030] Upper beam 110

[0031] Corner parts 111, 112

[0032] Lower beam 120

[0033] Reinforcement 130

[0034] Upper reinforcement plate 131

[0035] Lower reinforcement plate 132

[0036] Hinge reinforcement plate 140

[0037] Top cover rear crossbeam 2

[0038] Mounting part 2a

[0039] Upper beam 210

[0040] Size reduction unit 211

[0041] Top cover connection part 212

[0042] Connecting beam 220

[0043] Transfer part 221

[0044] Lower beam 230

[0045] Size extension 231

[0046] Slot structure 232

[0047] Gap 233

[0048] Hinge mounting portion 240

[0049] First reinforcement structure 250

[0050] First Plate 251

[0051] First inclined plate 252

[0052] Second reinforcement structure 260

[0053] Second plate 261

[0054] Second inclined plate 262

[0055] First reinforcement rib 21

[0056] Second reinforcement rib 22

[0057] The third reinforcement rib 23

[0058] Fourth reinforcement rib 24

[0059] Section 124a

[0060] 24b of the second paragraph

[0061] Fifth reinforcement rib 25

[0062] Main body 25a

[0063] Extension 25b

[0064] Sixth reinforcement rib 26

[0065] Seventh reinforcement 27

[0066] Annular reinforcement 28

[0067] Center Line L

[0068] Distance d. DETAILED DESCRIPTION

[0069] Reference will be made in detail to various embodiments of the present invention, examples of which are presented in the accompanying drawings and described below. Although the present invention will be described in conjunction with exemplary embodiments, it should be understood that this specification is not intended to limit the present invention to these exemplary embodiments. On the contrary, the present invention is intended to cover not only these exemplary embodiments, but also various alternative forms, modified forms, equivalent forms and other embodiments that may be included in the spirit of the present invention and within the scope defined by the appended claims.

[0070] The die-casting rear cross beam 2 for a vehicle (hereinafter referred to as the rear cross beam 2 ) provided by the utility model is an integrally formed structure and can be manufactured by a die-casting process.

[0071] See also Figure 2 The rear cross beam 2 of the roof includes an upper cross beam 210, a lower cross beam 230, and a connecting beam 220 connecting the upper cross beam 210 and the lower cross beam 230. The upper end of the connecting beam 220 is connected to the upper cross beam 210, and the lower end of the connecting beam 220 is connected to the lower cross beam 230.

[0072] A roof connection portion 212 is provided on the upper surface of the upper cross beam 210, and the roof rear cross beam 2 is connected to the roof assembly (not shown) through the roof connection portion 212. The aforementioned connection method is a prior art, such as bonding, welding, etc., and will not be described in detail herein.

[0073] Combined with reference Figure 2 and Figure 3 The two side portions of the rear cross beam 2 of the roof cover (including the two side portions of the upper cross beam 210, the two side portions of the connecting beam 220, and the two side portions of the lower cross beam 230) are provided with mounting portions 2a, and the mounting portions 2a can be welded together with the rear end of the side panel 300 of the vehicle through a welding process to complete the installation of the rear cross beam 2 of the roof cover.

[0074] Since the two side parts of the rear cross beam 2 of the roof are directly connected to the side panel 300 of the vehicle, stress concentration will occur at this position, resulting in deformation of the corner parts of the two side parts of the rear cross beam 2 of the roof (the two side parts of the upper cross beam and the two side parts of the lower cross beam).

[0075] In order to avoid the above-mentioned problems, when manufacturing the rear cross beam 2 of the top cover, the thickness of the two side parts of the rear cross beam 2 of the top cover is increased, so that the thickness of the two side parts of the rear cross beam 2 of the top cover (including the two side parts of the upper cross beam 210, the two side parts of the connecting beam 220, and the two side parts of the lower cross beam 230) is greater than the thickness of the middle part of the rear cross beam 2 of the top cover (including the middle part of the upper cross beam 210, the middle part of the connecting beam 220, and the middle part of the lower cross beam 230).

[0076] That is, the middle portion of the rear cross beam 2 of the top cover has a first thickness, and the two side portions of the rear cross beam 2 of the top cover have a second thickness, which is greater than the first thickness. For example, the first thickness may range from 2 mm to 5 mm, and the second thickness may range from 3 mm to 8 mm.

[0077] Continue reading Figure 1 , both side portions of the lower cross beam 230 are provided with hinged mounting portions 240, and the hinged mounting portions 240 are used to mount the hinge of the tailgate. The thickness of the hinged mounting portion 240 is greater than the thickness of the remaining portion of the rear cross beam 2 of the top cover. In other words, the hinged mounting portion 240 has a third thickness, which is greater than the second thickness. For example, the third thickness may range from 3 mm to 10 mm.

[0078] Since the stress on the hinged mounting portion 240 is higher than that on the side portion of the lower cross beam 230, the hinged mounting portion 240 needs to have higher strength and rigidity. After the tailgate is mounted on the hinged mounting portion 240, the high-strength and high-rigidity hinged mounting portion 240 can prevent deformation and cracking due to the heavy weight of the tailgate, thereby ensuring the reliability of the installation and improving the quality of the vehicle.

[0079] At the same time, the thickness of the hinged mounting part 240 is set to be relatively large, which can also provide an adjustment margin to meet the installation accuracy of the tailgate. It is inevitable that certain processing errors will occur in the manufacturing of various components of the vehicle. After assembly, these processing errors will accumulate and become larger, resulting in a larger gap after the vehicle tailgate is installed. Since the thickness of the hinged mounting part 240 is relatively large, it has a certain adjustment margin. When installing the tailgate, the thickness of the hinged mounting part 240 can be adjusted according to actual conditions to meet the installation accuracy of the tailgate.

[0080] By setting different thicknesses at different positions on the rear cross beam 2 of the roof, the amount of material can be reduced as much as possible while meeting the stiffness and strength required by each part of the rear cross beam 2, thereby reducing the weight of the rear cross beam 2 of the roof and thus reducing the overall weight of the vehicle.

[0081] Continue reading Figure 2 A first reinforcing rib 21 is formed between the lower cross beam 230 and the connecting beam 220 , and the first reinforcing rib 21 connects the upper surface of the lower cross beam 230 and the rear surface of the connecting beam 220 respectively.

[0082] The first reinforcing rib 21 can disperse the stress between the lower beam 230 and the connecting beam 220 to the upper surface of the lower beam 230 and the rear surface of the connecting beam 220, avoiding stress concentration at the connection between the lower beam 230 and the connecting beam 220, thereby avoiding deformation of the connection between the lower beam 230 and the connecting beam 220.

[0083] The first reinforcing rib 21 can increase the connection rigidity between the lower cross beam 230 and the connecting beam 220, that is, a more stable structure can be formed between the lower cross beam 230 and the connecting beam 220, so that the ability of the middle part of the roof rear cross beam 2 to resist distortion is enhanced. In other words, when the ability to resist distortion is equal, the thickness of the roof rear cross beam 2 provided with the first reinforcing rib 21 is smaller, and the weight of the roof rear cross beam 2 is also smaller.

[0084] A plurality of first reinforcing ribs 21 are provided along the left-right direction (three first reinforcing ribs 21 are shown in the figure, which is only exemplary and not suggestive or restrictive).

[0085] In order to ensure that the first reinforcing ribs 21 can evenly distribute the stress between the lower cross beam 230 and the connecting beam 220 to the upper surface of the lower cross beam 230 and the rear surface of the connecting beam 220, several first reinforcing ribs 21 are evenly distributed along the left and right directions; and several first reinforcing ribs 21 are symmetrically distributed relative to the center line L of the rear cross beam 2 of the top cover.

[0086] Furthermore, the distance d between two adjacent first reinforcing ribs 21 is equal.

[0087] Combined with reference Figure 2 and Figure 4 The middle portion of the upper cross beam 210 includes a reduced-size portion 211 , and the size of the reduced-size portion 211 in the front-to-back direction is smaller than the size of the side portion of the upper cross beam 210 in the front-to-back direction.

[0088] An extended portion 231 is formed in the middle portion of the lower cross beam 230 corresponding to the reduced portion 211 , and the extended portion 231 has a larger dimension in the front-to-back direction than the side portion of the lower cross beam 230 .

[0089] The connecting beam 220 is formed with transition parts 221 at positions corresponding to both sides of the size extension part 231. Specifically, the connecting beam 220 includes two side parts, two transition parts 221, and a middle part. Among them, the middle part of the connecting beam 220 connects the size reduction part 211 and the size extension part 231; the two transition parts 221 of the connecting beam 220 are respectively located on both sides of the middle part of the connecting beam 220, and the upper end of the transition part 221 is connected to the side part of the upper crossbeam 210, and the lower end of the transition part 221 is connected to one side of the size extension part 231; the side part of the connecting beam 220 connects the side part of the upper crossbeam 210 and the side part of the lower crossbeam 230.

[0090] The first reinforcing rib 21 can be formed between the two transition parts 221. Since the portion between the two transition parts 221 corresponds to the extended portion 231 of the lower cross beam 230, the first reinforcing rib 21 can extend a larger dimension in the front-rear direction. This makes the contact surface between the first reinforcing rib 21 and the lower cross beam 230 larger, and can also disperse more stress between the lower cross beam 230 and the connecting beam 220 to the upper surface of the lower cross beam 230. Therefore, the first reinforcing rib 21 is arranged at the position of the extended portion 231 of the lower cross beam 230, which can further increase the rigidity of the rear cross beam 2 of the roof.

[0091] A second reinforcing rib 22 may also be formed between the two transition portions 221, and the two ends of the second reinforcing rib 22 are respectively connected to the two transition portions 221. When the two sides of the roof rear cross beam 2 are subjected to force, the roof rear cross beam 2 tends to deform, which may cause the relative position between the two transition portions 221 to change. At this time, by providing the second reinforcing rib 22, the relative position of the two transition portions 221 can be ensured to be more stable, and the rigidity of the middle part of the roof rear cross beam 2 is further improved.

[0092] The second reinforcing ribs 22 also intersect with the first reinforcing ribs 21, thereby forming a longitudinally and transversely intersecting reinforcing rib structure, so that the ability of the middle portion of the rear cross beam 2 of the roof to resist torsional deformation is further enhanced.

[0093] Continue reading Figure 2 The two side portions of the lower cross beam 230 bulge upward to form two first reinforcement structures 250 , and the first reinforcement structure 250 includes a first flat plate 251 and a first inclined plate 252 .

[0094] A third reinforcing rib 23 is formed between the two first reinforcing structures 250, and two ends of the third reinforcing rib 23 are respectively connected to the first inclined plates 252 of the two first reinforcing structures 250. In other words, a third reinforcing rib 23 is formed on the extended portion 231 of the lower cross beam 230, and the third reinforcing rib 23 is located between the two first reinforcing structures 250, and two ends of the third reinforcing rib 23 are respectively extended and connected to the two first inclined plates 252.

[0095] When the rear cross beam 2 of the roof has a tendency to torsion deformation, this tendency may cause the relative position of the two first inclined plates 252 to change. The utility model can make the relative position between the two first inclined plates 252 more stable by setting the third reinforcing rib 23, thereby further increasing the ability of the rear cross beam 2 of the roof to resist torsion deformation. At the same time, the third reinforcing rib 23 can also intersect with the first reinforcing rib 21, thereby forming a grid-shaped reinforcement structure to increase the rigidity of the middle part of the rear cross beam 2 of the roof.

[0096] Continue reading Figure 2The hinged mounting portion 240 is located on the first reinforcing structure 250, and the hinged mounting portion 240 bulges upward relative to the first reinforcing structure 250 to form a second reinforcing structure 260. Specifically, the second reinforcing structure 260 is located on the first flat plate 251 and bulges upward relative to the first flat plate 251.

[0097] The second reinforcement structure 260 includes a second flat plate 261 and a second inclined plate 262 , wherein the second flat plate 261 is configured to be hinged to the mounting portion 240 .

[0098] See also Figure 5 A groove structure 232 having a notch 233 is formed on the lower surface of the lower cross beam 230 at a position corresponding to the second reinforcing structure 260 .

[0099] Specifically, the second reinforcement structure 260 is formed at a position near the connecting beam 220 on the side of the lower cross beam 230, so that the second reinforcement structure 260 forms a boss composed of a second flat plate 261 (hinged mounting portion 240) and three second inclined plates 262 on the upper surface of the lower cross beam 230. The boss corresponds to a groove structure 232 on the lower surface of the lower cross beam 230, and a notch 233 is formed on the side of the groove structure 232 near the connecting beam 220 because the second inclined plate 262 is not formed.

[0100] Since the lower surface of the lower cross beam 230 forms a groove structure 232 with a notch 233 corresponding to the position of the second reinforcement structure 260, when the rear cross beam 2 of the top cover is subjected to electrophoretic rust prevention treatment, such a groove structure 232 is more conducive to the removal of electrophoretic bubbles, thereby making the electrophoresis at this position more sufficient, which is beneficial to the rust prevention treatment at this position.

[0101] Continue reading Figure 2 A fourth reinforcing rib 24 is also provided on the side portion of the rear cross beam 2 of the top cover at a position corresponding to the hinged mounting portion 240 .

[0102] The fourth reinforcing rib 24 includes a first section 24a and a second section 24b connected to each other. The first section 24a is located on the upper surface of the upper cross beam 210, the second section 24b is located on the rear surface of the connecting beam 220, and the second section 24b extends to the hinged mounting portion 240. In other words, the fourth reinforcing rib 24 extends upward from the hinged mounting portion 240 to the connection between the upper cross beam 210 and the connecting beam 220 to form the second section 24b, and then extends from the connection between the upper cross beam 210 and the connecting beam 220 to the upper cross beam 210 and extends on the upper surface of the upper cross beam 210 to form the first section 24a.

[0103] When stress is generated between the side portion of the upper cross beam 210 and the side portion of the connecting beam 220, the first section 24a of the fourth reinforcing rib 24 can disperse the stress between the upper cross beam 210 and the connecting beam 220 to the upper surface of the upper cross beam 210, and the second section 24b of the fourth reinforcing rib 24 can disperse the stress between the upper cross beam 210 and the connecting beam 220 to the rear surface of the connecting beam 220. Thus, the fourth reinforcing rib 24 can prevent the stress between the upper cross beam 210 and the connecting beam 220 from being concentrated at the connection between the two, thereby increasing the connection rigidity between the upper cross beam 210 and the connecting beam 220.

[0104] See also Figure 5 A fifth reinforcing rib 25 is formed between the upper cross beam 210 and the connecting beam 220 , and the fifth reinforcing rib 25 connects the lower surface of the upper cross beam 210 and the front surface of the connecting beam 220 respectively.

[0105] The fifth reinforcing rib 25 can disperse the stress between the upper cross beam 210 and the connecting beam 220 to the lower surface of the upper cross beam 210 and the front surface of the connecting beam 220. Thus, the fifth reinforcing rib 25 can also avoid the problem of stress concentration that may occur between the upper cross beam 210 and the connecting beam 220. Therefore, the connection rigidity between the upper cross beam 210 and the connecting beam 220 can be further increased by combining the fifth reinforcing rib 25 with the fourth reinforcing rib 24.

[0106] In other achievable manners, the fifth reinforcing rib 25 may be used alone, or the fourth reinforcing rib 24 may be used alone.

[0107] Continue reading Figure 5 The lower surface of the lower cross beam 230 is provided with an annular reinforcement rib, and the annular reinforcement rib corresponds to the position of the hinged mounting portion 240. In other words, an annular reinforcement rib is formed at the bottom of the hinged mounting portion 240, and the annular reinforcement rib is a closed annular structure. The annular reinforcement rib can disperse the stress of the hinged mounting portion 240, further increase the rigidity and strength of the hinged mounting portion 240, so that the hinged mounting portion 240 can have better support, so as to improve the reliability of the tailgate installation.

[0108] At least a portion of the fifth reinforcing rib 25 can extend from the front surface of the connecting beam 220 to the lower surface of the lower cross beam 230 through the notch 233 and intersect with the annular reinforcing rib.

[0109] In other words, the fifth reinforcement rib 25 corresponding to the position of the notch 233 extends from the front surface of the connecting beam 220 to the bottom of the hinged mounting portion 240 (corresponding to the lower surface of the lower cross beam 230), and intersects with the annular reinforcement rib at the bottom of the hinged mounting portion 240, thereby forming the fifth reinforcement rib 25 A main portion 25a and an extension portion 25b.

[0110] The main body 25a can disperse the stress between the hinged mounting portion 240 and the connecting beam 220 to the front surface of the connecting beam 220, and the extended portion 25b can disperse the stress between the hinged mounting portion 240 and the connecting beam 220 to the lower surface of the lower cross beam 230 (corresponding to the bottom of the hinged mounting portion 240). Thus, by extending part of the fifth reinforcing rib 25 to the lower surface of the lower cross beam 230, the rigidity of the hinged mounting portion 240 is further enhanced (due to the further enhancement of the strength and rigidity of the hinged mounting portion 240, the ability of the connection between the connecting beam 220 and the lower cross beam 230 to resist deformation can also be enhanced).

[0111] Continue reading Figure 5 A sixth reinforcing rib 26 is formed at the side end of the annular reinforcing rib.

[0112] Specifically, a sixth reinforcing rib 26 is provided at each side end of the annular reinforcing rib, and the sixth reinforcing rib 26 extends in the left-right direction, with one end connected to the side end of the annular reinforcing rib and the other end connected to the second inclined plate 262 corresponding to the side end. The sixth reinforcing rib 26 can further enhance the rigidity of the second reinforcing structure 260.

[0113] Continue reading Figure 5 A seventh reinforcing rib 27 is formed between the two side ends of the annular reinforcing rib.

[0114] Specifically, a seventh reinforcing rib 27 extending along the front-to-back direction is formed between the two side ends of the annular reinforcing rib. One end of the seventh reinforcing rib 27 is connected to the annular reinforcing rib, and the other end is connected to the corresponding second inclined plate 262. The seventh reinforcing rib 27 can also further strengthen the strength of the second reinforcing structure 260.

[0115] It can be understood that the extended portion 25b, the sixth reinforcing rib 26, and the seventh reinforcing rib 27 are respectively formed around the annular reinforcing rib, which can not only enhance the structural strength of the annular reinforcing rib, but also further enhance the strength and rigidity of the second reinforcing structure 260. This makes the hinged mounting portion 240 more reliable, reduces the possibility of structural deformation of the hinged mounting portion 240 caused by the gravity of the tailgate, and ensures the sealing of the tailgate.

[0116] The two side ends of the roof rear cross beam 2 are also provided with a first connecting arm and a second connecting arm (not shown in the figure). The first connecting arm is used to connect to the upper side beam of the vehicle, and the second connecting arm is used to connect to the rear pillar of the vehicle. In other words, each side end of the roof rear cross beam 2 is provided with a first connecting arm for connecting to the upper side beam, and a second connecting arm for connecting to the rear pillar.

[0117] It should be pointed out that the first connecting arm and the second connecting arm have the same function as the mounting portion 2a described above. Therefore, in the solution using the first connecting arm and the second connecting arm, there is no need to provide the mounting portion 2a.

[0118] The utility model utilizes the characteristics of the die-casting process to form an integrally formed top cover rear cross beam 2. The thickness of a specific portion of the top cover rear cross beam 2 is increased, and a first reinforcing rib 21, a second reinforcing rib 22, a third reinforcing rib 23, a fourth reinforcing rib 24, a fifth reinforcing rib 25, a sixth reinforcing rib 26, a seventh reinforcing rib 27, a first reinforcing structure 250, and a second reinforcing structure 260 are formed on the top cover rear cross beam 2, so that the rigidity and strength of the top cover rear cross beam 2 are improved. Therefore, there is no need to set up additional reinforcing components, which simplifies the number of vehicle components. Under the premise of ensuring the rigidity of the vehicle itself, the number of components is reduced to reduce the weight of the vehicle, thereby reducing the energy consumption of the vehicle. In addition, due to the reduction in the number of vehicle components, the assembly process of the vehicle is also simplified to a certain extent, which can further reduce the manufacturing cycle and cost.

[0119] For the convenience of interpretation and precise definition of the appended claims, the terms "upper", "lower", "front", "rear", "left", "right", "upper surface", "lower surface", "front surface", "rear surface", and "upward" are used to describe the features of the exemplary embodiments with reference to the positions of these features shown in the accompanying drawings.

[0120] The description presented above of the specific exemplary embodiments of the utility model is for the purpose of illustration and description. The foregoing description is not intended to be exhaustive, nor is it intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations are possible based on the above teachings. The exemplary embodiments are selected and described in order to explain the specific principles of the utility model and its practical application, so that other technicians in the field can realize and utilize the various exemplary embodiments of the utility model and its different selected forms and modified forms. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A die-casting roof rear cross beam for a vehicle, characterized in that: include: An upper crossbeam, a connecting beam and a lower crossbeam are integrally formed, wherein the upper end of the connecting beam is connected to the upper crossbeam, and the lower end of the connecting beam is connected to the lower crossbeam; Two hinged mounting parts are respectively formed on two side portions of the lower cross beam, and the thickness of the hinged mounting parts is greater than the thickness of the remaining parts of the rear cross beam of the top cover; and A first reinforcing rib is connected between the upper surface of the lower cross beam and the rear surface of the connecting beam.

2. The die-casting roof rear cross member for a vehicle according to claim 1, characterized in that: The middle portion of the rear cross beam of the roof cover has a first thickness, the two side portions of the rear cross beam of the roof cover have a second thickness, and the two hinged mounting portions have a third thickness, wherein the first thickness is smaller than the second thickness, and the second thickness is smaller than the third thickness.

3. The die-casting roof rear cross member for a vehicle according to claim 1, characterized in that: The middle part of the upper cross beam includes a size reduction portion, the middle part of the lower cross beam forms a size extension portion corresponding to the size reduction portion, and the connecting beam forms two transition portions at positions corresponding to both sides of the size extension portion; The first reinforcing rib is formed between the two transition parts, and a second reinforcing rib intersecting with the first reinforcing rib is also formed between the two transition parts, and two ends of the second reinforcing rib are respectively connected to the two transition parts.

4. The die-casting roof rear cross member for a vehicle according to claim 1, characterized in that: The two side portions of the lower cross beam are respectively raised upward to form two first reinforcement structures, and a third reinforcement rib is formed between the two first reinforcement structures, and two ends of the third reinforcement rib are respectively connected to the two first reinforcement structures.

5. The die-casting roof rear cross member for a vehicle according to claim 4, characterized in that: The hinged mounting portion is located on the first reinforcement structure and bulges upward relative to the first reinforcement structure to form a second reinforcement structure, and a groove structure with a notch is formed on the lower surface of the lower cross beam corresponding to the position of the second reinforcement structure.

6. The die-casting roof rear cross member for a vehicle according to claim 1, characterized in that: Further including: Fourth reinforcing ribs, which are located at two side portions of the rear cross beam of the top cover corresponding to the positions of the hinged mounting portion; Wherein, the fourth reinforcing rib includes a first section and a second section connected to each other, the first section is located on the upper surface of the upper cross beam, the second section is located on the rear surface of the connecting beam, and the second section extends to the hinged mounting portion.

7. The die-casting roof rear cross member for a vehicle according to claim 5, characterized in that: Further including: A fifth reinforcing rib is connected between the lower surface of the upper cross beam and the front surface of the connecting beam.

8. The die-casting roof rear cross member for a vehicle according to claim 7, characterized in that: Further including: An annular reinforcing rib is located on the lower surface of the lower cross beam at a position corresponding to the hinged mounting portion.

9. The die-casting roof rear cross member for a vehicle according to claim 8, characterized in that: The notch is located on a side of the slot structure close to the connecting beam; At least a portion of the fifth reinforcing rib can extend from the front surface of the connecting beam through the notch to the lower surface of the lower cross beam and intersect with the annular reinforcing rib.

10. The die-casting roof rear cross member for a vehicle according to claim 8, characterized in that: Further including: A sixth reinforcing rib, which is located at two side ends of the annular reinforcing rib and connected to the annular reinforcing rib; A seventh reinforcing rib, which is located between two side ends of the annular reinforcing rib and connected to the annular reinforcing rib; Wherein, the extension direction of the sixth reinforcing rib is perpendicular to the extension direction of the seventh reinforcing rib.

11. The die-casting rear cross member for a vehicle according to any one of claims 1 to 10, characterized in that: Further including: A first connecting arm, which is located at two side ends of the rear cross beam of the roof and is used to connect the upper side beam of the vehicle; The second connecting arm is located at two side ends of the rear cross beam of the roof and is used for connecting the rear pillar of the vehicle.

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