A vehicle body structure and an automobile thereof

Abstract

The present application relates to a vehicle body structure and an automobile thereof, which comprises: a roof cover, in the extending direction of the vehicle body width, the middle part of the roof cover is higher than both ends of the roof cover; in the extending direction of the vehicle body length, the rear end of the roof cover is higher than the front end of the roof cover; a first drainage groove and a second drainage groove are formed on the roof cover, the length extending direction of the first drainage groove is the same as the extending direction of the vehicle body width, the length extending direction of the second drainage groove is the same as the extending direction of the vehicle body length, and the water outlets of both the first drainage groove and the second drainage groove are used for communicating with the A-pillar. In the present invention, in the extending direction of the vehicle body width, the middle part of the roof cover is higher than both ends of the roof cover, and in the extending direction of the vehicle body length, the rear end of the roof cover is higher than the front end of the roof cover, which can ensure that external rainwater flows to the front end and both ends of the roof cover and drains down. At the same time, this structure cooperates with the first drainage groove and the second drainage groove, so that the condensed water formed in the cab can flow to the A-pillar and be discharged from the cab.

Description

Technical Field

[0001] This application relates to the field of automobiles, and particularly to a vehicle body structure and an automobile thereof. Background Art

[0002] In the existing vehicle body structure, the problem of rainwater entering the cab is solved only by applying sealant between various components of the cab roof. At the same time, when the weather changes and the temperature drops, the water vapor in the cab is easily attached to the roof to form condensed water. In order to prevent the condensed water from flowing forward to the windshield glass from the gap between the sheet metals in the existing cab, sealant is applied between the three layers of sheet metals at the front windshield stop. Therefore, two long strips of spot weld sealant need to be applied, which increases the welding resistance and makes welding difficult at the windshield stop, and the sealant at the stop is easy to drip onto the lower front panel; at the same time, there is only sealant blocking and drainage at the front windshield stop to let the water flow out from the A-pillar, while the middle, rear, left and right side roofs use absorbent felts to absorb water, and the large amount of condensed water will still wet the interior trim panel, making the user mistakenly think that the roof leaks, and the wet absorbent felt will also rot and corrode the inner surface sheet metal of the cab. Summary of the Invention

[0003] The embodiments of this application provide a vehicle body structure and an automobile thereof to solve the problems of cab rain leakage and poor condensed water diversion effect in the related art.

[0004] To achieve the above object, the present invention provides the following technical solutions: In the first aspect, a vehicle body structure is provided, which includes: a roof cover. Along the vehicle body width extension direction, the middle part of the roof cover is higher than both ends of the roof cover. Along the vehicle body length extension direction, the rear end of the roof cover is higher than the front end of the roof cover. A first diversion groove and a second diversion groove are formed on the roof cover. The length extension direction of the first diversion groove is the same as the vehicle body width extension direction, and the length extension direction of the second diversion groove is the same as the vehicle body length extension direction. The water outlets of the first diversion groove and the second diversion groove are both used to communicate with the A-pillar.

[0005] In some embodiments, the roof cover includes a front roof cover plate, side roof cover plates, a middle roof cover plate, and a rear outer panel - upper. The middle roof cover plate is welded and fixed to the rear outer panel - upper. The front roof cover plate is welded to the front end of the middle roof cover plate. The side roof cover plates are welded to both ends of the middle roof cover plate. One end of the side roof cover plate is welded and fixed to the rear end of the front roof cover plate.

[0006] In some embodiments, the middle roof cover plate is higher than the side roof cover plates, and the middle roof cover plate is higher than the front roof cover plate.

[0007] In some embodiments, reinforcing ribs are provided on the roof cover, and the length extension direction of the reinforcing ribs is the same as the vehicle body length extension direction.

[0008] In some embodiments, the top cover further includes an outer front cross member of the top cover. A first diversion groove is formed between the connection between the outer front cross member of the top cover and the front top cover plate, and a sealant is coated inside the first diversion groove.

[0009] In some embodiments, the top cover further includes a side outer upper cross member and a door frame. A second diversion groove is formed between the connections of the side outer upper cross member and the door frame with the side top cover plate. A sealant is coated inside the second diversion groove, and a sealant is also coated between the side top cover plate and the door frame.

[0010] In some embodiments, a water drainage hole is formed in the top cover. The water drainage hole is located between the water outlet of the first diversion groove and the water outlet of the second diversion groove, and is used to communicate with the A-pillar.

[0011] In some embodiments, a third diversion groove is further provided on the vehicle body structure. The length extension direction of the third diversion groove is the same as the vehicle body width extension direction.

[0012] In some embodiments, the vehicle body structure further includes a rear outer panel. The rear outer panel is arranged at the upper bottom end of the rear outer panel. A rear windshield reinforcement plate is provided on the rear outer panel, and a third diversion groove is formed between the rear windshield reinforcement plate and the rear outer panel.

[0013] In a second aspect, a vehicle is provided, which includes the vehicle body structure as described above.

[0014] The beneficial effects brought by the technical solutions provided in this application include:

[0015] The embodiments of this application provide a vehicle body structure and a vehicle. Along the vehicle body width extension direction, the middle part of the top cover is higher than both ends of the top cover. Along the vehicle body length extension direction, the rear end of the top cover is higher than the front end. This can ensure that external rainwater flows to the front end and both ends of the top cover and drains down. At the same time, this structure cooperates with the first diversion groove and the second diversion groove, enabling the condensed water formed in the cab to flow to the A-pillar and drain out of the cab. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic top view structure diagram of the top cover provided by the embodiments of this application;

[0018] Figure 2 It is a schematic side view structure diagram of the top cover provided by the embodiments of this application;

[0019] Figure 3 Schematic diagram of the front structure of the top cover provided by the embodiment of the present application;

[0020] Figure 4 Schematic diagram of the structure of the third sizing part provided by the embodiment of the present application;

[0021] Figure 5 Schematic diagram of the condensate flow direction provided by the embodiment of the present application;

[0022] Figure 6 Schematic diagram of the structure of the first diversion groove provided by the embodiment of the present application;

[0023] Figure 7 Schematic diagram of the structure of the first diversion groove provided by the embodiment of the present application;

[0024] Figure 8 It is Figure 6 Schematic diagram of the A-A structure in;

[0025] Figure 9 It is Figure 6 Schematic diagram of the A-A structure in;

[0026] Figure 10 Schematic diagram of the structures of the first and second diversion grooves provided by the embodiment of the present application;

[0027] Figure 11 Schematic diagram of the structure of the second diversion groove provided by the embodiment of the present application;

[0028] Figure 12 Schematic diagram of the structure of the second diversion groove provided by the embodiment of the present application;

[0029] Figure 13 It is Figure 11 Schematic diagram of the B-B structure in;

[0030] Figure 14 It is Figure 11 Schematic diagram of the B-B structure in;

[0031] Figure 15 Schematic diagram of the condensate flow direction provided by the embodiment of the present application;

[0032] Figure 16 Schematic diagram of the structure of the third diversion groove and the condensate flow direction;

[0033] Figure 17 It is Figure 16 Schematic diagram of the partial enlarged structure in;

[0034] Figure 18 It is Figure 16 Schematic diagram of the A-A structure in;

[0035] Figure 19 It isFigure 16 Schematic diagram of the A-A structure;

[0036] Figure 20 Schematic diagram of the floor structure provided by the embodiment of the present application.

[0037] In the figure: 1. Top cover; 10. Front top cover plate; 11. Outer plate of the front cross beam of the top cover; 12. Drainage hole; 13. Outer upper side cross beam; 14. Side top cover plate; 15. Middle top cover plate; 16. Rear outer panel - upper; 17. Reinforcing rib; 18. Door frame; 19. Front cross beam of the top cover;

[0038] 2. First diversion groove; 20. First gluing part;

[0039] 3. Second diversion groove; 30. Second gluing part;

[0040] 4. Third gluing part;

[0041] 5. Rear outer panel; 50. Rear windshield reinforcement plate; 51. Third diversion groove; 52. Fourth gluing part;

[0042] 6. Floor; 60. Drainage hole. Specific implementation manners

[0043] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0044] See Figures 1 to 14 , the embodiment of the present application provides a vehicle body structure and an automobile thereof, which can solve the problems of rain leakage in the cab and poor diversion effect of condensed water in the cab in the related art.

[0045] In the first aspect, the embodiment of the present application provides a vehicle body structure, which includes: a top cover 1. Along the vehicle body width extension direction, the middle part of the top cover 1 is higher than both ends of the top cover 1. Along the vehicle body length extension direction, the rear end of the top cover 1 is higher than the front end of the top cover 1. A first diversion groove 2 and a second diversion groove 3 are formed on the top cover 1. The length extension direction of the first diversion groove 2 is the same as the vehicle body width extension direction, and the length extension direction of the second diversion groove 3 is the same as the vehicle body length extension direction. The water outlets of the first diversion groove 2 and the second diversion groove 3 are both used to communicate with the A-pillar.

[0046] In this application, along the vehicle body width extension direction, the middle part of the roof cover 1 is higher than both ends of the roof cover 1. Along the vehicle body length extension direction, the rear end of the roof cover 1 is higher than the front end of the roof cover 1, which can ensure that external rainwater flows to the front end and both ends of the roof cover 1 and drains down. At the same time, this structure cooperates with the first diversion groove 2 and the second diversion groove 3, enabling the condensed water formed in the cab to flow to the A-pillar and drain out of the cab.

[0047] To solve the problem of rain leakage from the cab roof cover 1 and ensure the normal and stable sealing of the connection seams at the lap joints of the roof cover 1 components. For this purpose, in addition to eliminating the potential hazards existing in the vehicle body structure itself, it is also necessary to eliminate the problems of poor craftsmanship that are likely to occur during the manufacturing process of the vehicle body structure. Therefore, to solve the problem of water accumulation on the top of the roof cover 1, the middle part of the roof cover 1 is set higher than both ends of the roof cover 1. Along the vehicle body length extension direction, the rear end of the roof cover 1 is higher than the front end of the roof cover 1.

[0048] Among them, the roof cover 1 includes a front roof cover plate 10, side roof cover plates 14, a rear outer panel - upper 16, and a middle roof cover plate 15. The middle roof cover plate 15 is welded and fixed to the rear outer panel - upper 16. The front roof cover plate 10 is welded to the front end of the middle roof cover plate 15. The side roof cover plates 14 are welded to both ends of the middle roof cover plate 15. One end of the side roof cover plate 14 is welded and fixed to the rear end of the front roof cover plate 10. More specifically, the side roof cover plate 14 includes a left side roof cover plate and a right side roof cover plate. The left side roof cover plate is welded to the left end of the middle roof cover plate 15, and the right side roof cover plate is welded to the right end of the middle roof cover plate 15. The front roof cover plate 10 is welded to the front end of the middle roof cover plate 15. The middle roof cover plate 15 and the rear outer panel - upper 16 are fixed by spot welding. The middle roof cover plate 15 is integrally formed by stamping the existing vehicle's middle roof plate and rear roof plate, avoiding water leakage at the overlapping edges of the middle roof plate and the rear roof plate.

[0049] In some possible embodiments, the middle roof cover plate 15 is higher than the side roof cover plates 14, and the middle roof cover plate 15 is higher than the front roof cover plate 10. In this embodiment, when rainwater falls on the top of the roof cover 1, the rainwater can flow to the front end and both sides of the roof cover 1 and drain down, avoiding rainwater staying on the roof cover 1.

[0050] On the basis of the above embodiments, in order to make the drainage effect of the roof cover 1 better, the middle roof cover plate 15 is set with the rear end higher than the front end, and the front roof cover plate 10 is set with the rear end higher than the front end, that is, the rear end of the middle roof cover plate 15 is higher than the front end of the middle roof cover plate 15, and the rear end of the front roof cover plate 10 is higher than the front end of the front roof cover plate 10. And the front end of the middle roof cover plate 15 is higher than the rear end of the front roof cover plate 10, forming a slope at the top of the roof cover 1. When rainwater falls on the rear end of the middle roof cover plate 15, it can slide down along the slope to the front end of the front roof cover plate 10 and drain out; the middle part of the middle roof cover plate 15 is higher than both sides of the middle roof cover plate 15. In the width direction of the roof cover 1, the end of the left side roof cover plate close to the middle roof cover plate 15 is higher than the end of the left side roof cover plate far from the middle roof cover plate 15, and the end of the right side roof cover plate close to the middle roof cover plate 15 is higher than the end of the right side roof cover plate far from the middle roof cover plate 15. The roof cover 1 is an arc-shaped structure. When rainwater falls on the middle roof cover plate 15, it can slide down along the slope to the left side roof cover plate or the right side roof cover plate and drain out.

[0051] Meanwhile, reinforcing ribs 17 are provided on the top cover 1. The length extension direction of the reinforcing ribs 17 is the same as the length extension direction of the vehicle body. Specifically, the reinforcing ribs 17 are provided on the middle top cover plate 15. Since a skylight is also provided on the middle top cover plate 15, in order to prevent rainwater from leaking into the cab from the connection between the skylight and the middle top cover plate 15 when passing through the skylight, an annular closed-loop rib is provided on the middle top cover plate 15 and around the skylight, and open reinforcing ribs 17 are provided at other positions of the middle top cover plate 15. The length extension direction of the open reinforcing ribs 17 is the same as the length extension direction of the vehicle body, that is, the direction of the open reinforcing ribs 17 is the same as the water flow direction. The purpose of this setting is to ensure that when rainwater flows from the rear end of the middle top cover plate 15 to the front top cover plate 10, it does not stay on the top cover 1, which can reduce the possibility of rain leakage from the top cover 1.

[0052] In order to prevent rainwater from leaking into the cab through the gaps in the connection seams, in the prior art, sealant is applied between all components of the cab top cover 1 for sealing. For example, sealant is applied between the middle top cover plate 15 and the side top cover plate 14, and between the middle top cover plate 15 and the front top cover plate 10, and the upper rear outer panel 16. In order to prevent the top cover 1 from cracking and leaking due to personnel trampling, structural adhesive with high bonding strength is also applied between the connection seams of the front top cover plate 10 and the middle top cover plate 15, and between the middle top cover plate 15 and the upper rear outer panel 16, that is, double-layer sealing is carried out using structural adhesive and sealant. The cab top cover 1 is very high and the glue line is very long, making it difficult for workers to operate when applying the glue; the structural adhesive and spot welding sealant at the non-welded points are prone to overflow when passing through the electrophoresis drying furnace, and the dried and solidified overflowed glue makes it impossible to apply the weld sealant on the surface of the subsequent connection seams.

[0053] In the present application, by integrally forming the middle top plate and the rear top plate to form the middle top cover plate 15, not only the water leakage at the connection seam between the middle top plate and the rear top plate in the existing vehicle is eliminated, but also the glue application and sealing of the top cover 1 can be reduced. At the same time, in cooperation with the new process of laser brazing, the outer coverings of the entire cab top cover 1, namely the front top cover plate 10, the left top cover plate, the right top cover plate, and the middle top cover plate 15, form a sealed whole. Except for using a small amount of glue for auxiliary sealing at the end of the laser welding, almost all the weld sealants on the original top cover 1 can be cancelled.

[0054] Laser brazing uses a filler metal with a melting point lower than that of the steel plate of the vehicle body roof 1. After being heated and melted, the liquid filler metal wets the vehicle body steel plate, fills the gap between the overlapping edges, and diffuses with the vehicle body steel plate to achieve connection. The new laser brazing process not only makes the joint seam more beautiful, but also improves the sealing performance and enhances the safety of the whole vehicle. Since the roof 1 mostly has a curved surface, and laser welding has relatively high requirements for the surface accuracy of parts, the positioning tooling for the roof 1 adopts a piano-key type profiling vehicle body pressing tooling structure. The piano-key type profiling vehicle body pressing tooling structure includes a fixture base frame and the pressing heads on both sides of the frame. The pressing heads include multiple adjustable small pressing heads, which are arranged in a piano-key type pressing mechanism at intervals on the side of the frame, and the pressure of each adjustable small pressing head can be adjusted. The surface of each pressing head matches the surface of the vehicle body roof 1 to ensure that each pressing block can fit well with the vehicle body roof 1, so as to ensure that when laser wire welding is carried out, the gap between the vehicle body roof 1 and the welding joint with the vehicle body side wall is less than 0.3 mm, which can better ensure the welding quality and welding appearance.

[0055] Traditional spot welding, that is, resistance welding, overlaps the overlapping edges of different cover plates, applies pressure through electrodes, and uses the resistance heat generated by the current passing through the contact surface and adjacent areas of the joint for welding. Only at the solder joints does the metal have local fusion, and there will be a certain gap in the metal at the intervals between the solder joints (between 50 mm and 200 mm). It is necessary to use glue to seal between the overlapping cover plates to ensure that rainwater outside the cab does not enter the cab. Therefore, the laser brazing method can eliminate almost all the weld sealants on the original roof 1, as well as the high-strength spot welding structural adhesives between the overlapping edges of the front roof and the middle roof, and the middle roof and the rear roof in the traditional roof structure; as Figure 4 shown, after laser brazing, sealant is only applied at the contact points between the middle roof cover plate 15, the front roof cover plate 10, and the side roof cover plate 14, which is the end of the laser welding. Specifically, a third sealant application part 4 is provided at the connection between one end of the middle roof cover plate 15 and the front roof cover plate 10 and the side roof cover plate 14, at the connection between the side roof cover plate 14 and the front roof cover plate 10, and at the bottom end of the front roof cover plate 10, and sealant is applied on the third sealant application part 4.

[0056] In the cold winter, the water vapor generated by the user cooking, boiling water, and breathing in the enclosed cab, as well as the humid air in the cab, is cooled by the low-temperature surface of the metal sheet metal on the inner wall of the top cover 1 and reaches the dew point temperature, causing the humid medium in the air to condense into water droplets and adhere to the surface of the metal sheet metal. At the same time, due to the very low temperature at night in winter, the water droplets quickly freeze, and layers of ice accumulate on the metal sheet metal. When the vehicle travels to a warm place and the temperature of the metal sheet metal rises, the ice layer melts, forming a large amount of dew. These dews will flow to the front top glass and side top glass of the cab, etc., making the user mistakenly think that the cab is leaking rain. Among the measures to solve the cab condensate, in addition to the isolation through the interior trim panel, it is to paste absorbent materials on the metal sheet metal inside the cab. The absorbent materials can reduce the temperature difference between inside and outside the cab while having a certain water absorption effect, preventing water droplets from falling. However, these measures will cause a significant increase in cost on the one hand, and on the other hand, absorbent materials such as felt are prone to getting damp and mildewing, and will in turn corrode the metal sheet metal. Therefore, it is necessary to drain the condensate outside the vehicle, thereby improving the corrosion resistance quality of the body assembly.

[0057] Therefore, along the vehicle width extension direction, the middle part of the top cover 1 is higher than both ends of the top cover 1, and along the vehicle length extension direction, the rear end of the top cover 1 is higher than the front end of the top cover 1. In cooperation with this, a first diversion groove 2 and a second diversion groove 3 are formed on the top cover 1. The length extension direction of the first diversion groove 2 is the same as the vehicle width extension direction, and the length extension direction of the second diversion groove 3 is the same as the vehicle length extension direction. The water outlets of the first diversion groove 2 and the second diversion groove 3 are both used to communicate with the A-pillar, ensuring that the condensate can flow to the A-pillar and be discharged from the drainage groove at the bottom of the A-pillar out of the cab.

[0058] Specifically, the top cover 1 further includes an outer front cross member panel 11 of the top cover. As Figure 8 shown, a first diversion groove 2 is formed between the connection between the outer front cross member panel 11 of the top cover and the front top cover panel 10; as Figure 13 shown, the top cover 1 further includes an outer upper side cross member 13 and a door frame 18. A second diversion groove 3 is formed between the connections of the outer upper side cross member 13, the door frame 18 and the side top cover panel 14.

[0059] Therefore, as shown in 5, there are multiple condensate flow paths:

[0060] The first path: The condensate condensed on the inner wall metal sheet metal of the front top cover panel 10, the middle top cover panel 15 and the upper part of the rear outer panel 16 flows along the metal sheet metal to the front windshield stop of the top cover 1, and then flows along the first diversion groove 2 into the A-pillars on both sides.

[0061] The second path: The condensate condensed on the inner wall metal sheet metal of the front top cover panel 10 and the middle top cover panel 15 first drips onto the interior trim panel of the top cover 1, flows along the interior trim panel to the front top back panel of the top cover 1, then to the front windshield stop, and then flows along the first diversion groove 2 into the A-pillars on both sides.

[0062] The front crossbeam assembly of the roof panel 1 includes an outer panel 11 of the front crossbeam of the roof panel and a front crossbeam 19 of the roof panel. It is first welded to the side beam assembly and the rear beam assembly of the cab assembly, etc., to form a circumferential beam around the top of the cab. Then, all the remaining parts of the roof panel 1 are welded into a roof panel assembly, including all the remaining roof beams, and the outer covering parts of the roof panel, including the front roof panel 10 welded into a whole by laser, the left / right side roof panels 14, the middle roof panel 15, and the upper outer panel of the rear enclosure 16 spot-welded with flange edges. After all the above-mentioned roof beams and outer covering parts are welded into a whole, it vertically drops from the air onto the cab assembly welding line from top to bottom, and then is welded to the front crossbeam assembly of the roof panel to form the cab assembly. Therefore, only between the front roof panel 10 and the outer panel 11 of the front crossbeam of the roof panel, as Figure 8 shown, that is, a first diversion groove 2 with an inward depression and a size of R5 is designed on the roof beam to prevent the applied sealant from being wiped off by the vertically dropping roof panel 1. Along the width direction of the vehicle body structure, the first diversion groove 2 runs through the entire outer panel 11 of the front crossbeam of the roof panel from left to right. As Figure 9 shown, the inner wall of the first diversion groove 2 is a first sealant application part 20. Sealant is applied at the first sealant application part 20. After the sealant is coated, heated in a drying furnace, and foamed and expanded, it fills the front roof panel 10 and the outer panel 11 of the front crossbeam of the roof panel, blocking the condensed water flowing down from the roof panel 1 and forming a first diversion structure that guides the condensed water from the highest point in the middle of the front windshield stop to the left and right A-pillars. The middle part of the first diversion structure is higher than the two ends of the first diversion structure, so that the condensed water flows to the left and right A-pillars to the left and right respectively.

[0063] The roof panel 1 further includes a side outer upper crossbeam 13 and a door frame 18. As Figure 13 shown, a second diversion groove 3 is formed between the connections of the side outer upper crossbeam 13, the door frame 18 and the side roof panel 14. Specifically, the side outer upper crossbeam 13 includes a left side outer upper crossbeam 13 and a right side outer upper crossbeam 13, and the door frame 18 includes a left door frame and a right door frame. A second diversion groove 3 is designed between the left side outer upper crossbeam 13, the left side roof panel and the left door frame, and a second diversion groove 3 is designed between the right side outer upper crossbeam 13, the right side roof panel and the right door frame. As Figure 14As shown, the inner wall of the second guiding groove 3 is the second sizing part 30. Along the length direction of the vehicle body structure, a sealing strip is applied along the second guiding groove 3 from front to back, that is, the sealing glue is applied to the second sizing part 30. After the sealing glue is applied, heated in the drying furnace, and foamed and expanded, it fills the left outer upper cross member 13, the left door frame, the right outer upper cross member 13, and the right door frame, blocking the condensed water flowing down from the side top cover plate 14. And the condensed water forms a second guiding structure along the glue line from the highest point at the rear end, and along the length direction of the vehicle body structure, it flows to the front end of the roof 1 and then to the left and right A-pillars. At the same time, in order to prevent outdoor rainwater from entering the cab interior through the gaps between the left door frame, the left side top cover plate, the right door frame, and the right side top cover plate, sealing glue is also applied between the left door frame, the left side top cover plate, the right door frame, and the right side top cover plate.

[0064] Based on the above embodiments, in this embodiment, a water flow hole 12 is opened on the roof 1. The water flow hole 12 is located between the water outlet of the first guiding groove 2 and the water outlet of the second guiding groove 3, and the water flow hole 12 is used to communicate with the A-pillar.

[0065] In this embodiment, water flow holes 12 are opened between the second guiding groove 3 on the left side of the roof 1 and the first guiding groove 2 and between the second guiding groove 3 on the right side of the roof 1 and the first guiding groove 2. The condensed water can flow into the A-pillar through the water flow holes 12 and then be discharged from the cab through the drainage groove at the bottom of the A-pillar.

[0066] Based on the above embodiments, in this embodiment, in order to further improve the drainage effect of the condensed water inside the cab, as Figure 16 、 17 shown, a third guiding groove 51 is further provided on the vehicle body structure. At the same time, the vehicle body structure further includes a floor 6, and a drainage hole 60 is opened on the floor 6. The length extension direction of the third guiding groove 51 is the same as the width extension direction of the vehicle body. Through the third guiding groove 51, water can be guided from the rear outer panel - upper 16 to the floor 6 and discharged from the cab through the drainage hole 60 of the floor 6.

[0067] Specifically, the vehicle body structure further includes an outer rear panel 5, which is disposed at the bottom end of the upper outer rear panel 16. The outer rear panel 5 is fixed to the upper outer rear panel 16 by spot welding. A rear windshield reinforcement plate 50 is provided on the outer rear panel 5, and a third diversion groove 51 is formed between the rear windshield reinforcement plate 50 and the outer rear panel 5. The rear windshield reinforcement plate 50 is set to be high in the middle and low at both ends, so that the condensed water can flow along the third diversion groove 51 to the floor 6. Along the width direction of the vehicle body structure, the third diversion groove 51 runs through the rear windshield reinforcement plate 50 from left to right. The inside of the third diversion groove 51 is coated with a sealant, and the inner wall of the third diversion groove 51 is a fourth sealant application part 52. The sealant is applied at the fourth sealant application part 52. After being coated, heated in a drying furnace, and foamed and swollen, the sealant fills the space between the rear windshield reinforcement plate 50 and the outer rear panel 5, blocking the condensed water flowing down from the upper outer rear panel 16, and forming a third diversion structure that guides the condensed water from the highest point in the middle of the rear windshield reinforcement plate 50 to the left and right sides of the rear windshield reinforcement plate 50. The middle part of the third diversion structure is higher than both ends of the third diversion structure, so that the condensed water flows left and right respectively to the drain holes 60 of the floor 6 and is discharged from the cab.

[0068] The sealant should not only meet the requirements of blocking and guiding the condensed water of the front top cover plate 10 and the side top cover plate 14. Since the bus is welded on the overall roof cover 1, the sealant cannot be applied between the lapped edges. Therefore, the sealant also needs to meet the requirements of open-type application, and more importantly, it must meet the requirements that the open-type sealant can follow the cab and roll in 25 pretreatment and electrophoresis tanks in the roll-type electrophoresis coating line, and will not fall off or deform under the infiltration and impact of the high-temperature coating liquid in 25 tanks.

[0069] Based on the following considerations:

[0070] The open-type blocking space is very large, and a sealant with a high expansion coefficient needs to be used. The initially determined expansion coefficient should be greater than or equal to 100%;

[0071] A guiding sealant strip that is high in the middle and low on both sides is formed on the entire front top cover plate 10, so that the condensed water flows from the middle part of the first diversion structure to the left / right A-pillars on both sides. Therefore, the foaming ratio of the sealant cannot be too high. If the foaming ratio is too high, it will cause high-foaming protrusions locally, which will hinder the flow of condensed water. Therefore, it is best to use a sealant with a dense and smooth sealant layer formed on the foaming surface;

[0072] To meet the requirements that the open-type sealant can follow the cab and roll in the roll-type coating line, and will not fall off or deform under the infiltration and impact of the liquid in 25 high-temperature coating tanks, the sealant must have the characteristics of anti-flushing and foaming at a specific temperature; that is, the sealant can only foam until it reaches a specific temperature in the drying furnace; before that, the sealant will not undergo a foaming reaction when infiltrated and impacted by the high-temperature coating liquid in the coating tank.

[0073] In summary, it is more appropriate to use a rubber-based spot welding sealant, which has a foaming ratio between 50% and 100%, good aging resistance, and can achieve the same lifespan as the whole vehicle. Moreover, it has the best wash resistance and will not fall off or deform after being soaked and impacted by 25 coating liquids in the cab-over type painting line.

[0074] On this basis, adding a certain amount of foaming agent can increase the foaming ratio to 300%, which is convenient for filling the open space. At the same time, in order to form a dense waterproof and water-blocking layer on the surface of the sealant, epoxy resin can be added to form closed pores on the surface of the sealant colloid.

[0075] In a second aspect, an embodiment of the present application provides an automobile, which includes the body structure provided in any one of the above embodiments of the present application. The specific structure of the automobile in the embodiment of the present application is not limited.

[0076] In the present application, along the extending direction of the vehicle body width, the middle part of the roof cover 1 is higher than both ends of the roof cover 1. Along the extending direction of the vehicle body length, the rear end of the roof cover 1 is higher than the front end of the roof cover 1, which can ensure that external rainwater flows to the front end and both ends of the roof cover 1 and drains down. At the same time, this structure cooperates with the first diversion groove 2 and the second diversion groove 3, so that the condensed water formed in the cab can flow to the A-pillar and drain out of the cab. This solves the problem of rain leakage in the cab roof cover 1 and ensures the normal and stable sealing at the lap joints of the roof cover 1 parts. Therefore, in addition to eliminating the hidden dangers existing in the body structure itself, it is also necessary to eliminate the problems of poor process that are likely to occur during the manufacturing process. Therefore, in order to solve the problem of water accumulation on the top of the roof cover 1, the middle part of the roof cover 1 is set higher than both ends of the roof cover 1, and along the extending direction of the vehicle body length, the rear end of the roof cover 1 is higher than the front end of the roof cover 1.

[0077] Among them, the roof cover 1 includes a front roof cover plate 10, side roof cover plates 14, a rear outer panel - upper 16, and a middle roof cover plate 15. The middle roof cover plate 15 is welded and fixed to the rear outer panel - upper 16. The front roof cover plate 10 is welded to the front end of the middle roof cover plate 15. The side roof cover plates 14 are welded to both ends of the middle roof cover plate 15, and one end of the side roof cover plate 14 is welded and fixed to the rear end of the front roof cover plate 10. More specifically, the side roof cover plates 14 include a left side roof cover plate and a right side roof cover plate. The left side roof cover plate is welded to the left end of the middle roof cover plate 15, the right side roof cover plate is welded to the right end of the middle roof cover plate 15, the front roof cover plate 10 is welded to the front end of the middle roof cover plate 15, and the middle roof cover plate 15 is fixed to the rear outer panel - upper 16 by spot welding. The middle roof cover plate 15 is integrally formed by stamping the existing vehicle's middle roof plate and rear roof plate, avoiding water leakage at the overlapping edges of the middle roof plate and the rear roof plate.

[0078] Meanwhile, reinforcing ribs 17 are provided on the top cover 1. The length extension direction of the reinforcing ribs 17 is the same as the length extension direction of the vehicle body. Specifically, the reinforcing ribs 17 are provided on the middle top cover plate 15. Since a skylight is also provided on the middle top cover plate 15, in order to prevent rainwater from leaking into the cab from the connection between the skylight and the middle top cover plate 15 when passing through the skylight, an annular closed-loop rib is provided on the middle top cover plate 15 and around the skylight, and open reinforcing ribs 17 are provided at other positions of the middle top cover plate 15. The length extension direction of the open reinforcing ribs 17 is the same as the length extension direction of the vehicle body, that is, the direction of the open reinforcing ribs 17 is the same as the water flow direction. The purpose of this setting is to ensure that when rainwater flows from the rear end of the middle top cover plate 15 to the front top cover plate 10, it does not stay on the top cover 1, so as to reduce the possibility of rain leakage from the top cover 1.

[0079] In this application, by integrally forming the middle top plate and the rear top plate to form the middle top cover plate 15, not only the water leakage at the connection seam between the middle top plate and the rear top plate in the existing vehicle is eliminated, but also the glue sealing of the top cover 1 can be reduced. At the same time, combined with the new process of laser brazing, the entire cab top cover 1 forms a sealed whole. Except for using a small amount of glue for auxiliary sealing at the end of the laser welding, almost all the weld sealants on the original top cover 1 can be cancelled.

[0080] Laser brazing uses a filler metal with a melting point lower than that of the steel plate of the vehicle body top cover 1. After being melted by heat, the liquid filler metal wets the vehicle body steel plate, fills the gap between the overlapping edges and diffuses with the vehicle body steel plate to achieve connection. The new process of using laser brazing not only makes the connection seam more beautiful, but also improves the sealing performance and enhances the safety of the whole vehicle. Since the top cover 1 mostly has a curved surface shape, and the laser welding has relatively high requirements for the surface accuracy of parts, the positioning tooling of the top cover 1 all adopts the structure of a piano key type profiling vehicle body pressing tooling. The piano key type profiling vehicle body pressing tooling structure includes a fixture base frame and the pressing heads on both sides of the frame. The pressing heads include multiple adjustable small pressing heads, which are arranged in a piano key type pressing mechanism at intervals on the side of the frame, and the pressure of each adjustable small pressing head can be adjusted. The surface of each pressing head matches the surface of the vehicle body top cover 1 to ensure that each pressing block can fit well with the vehicle body top cover 1, so as to ensure that when laser wire feeding welding is carried out, the gap between the vehicle body top cover 1 and the welding joint with the vehicle body side wall is less than 0.3mm, which can better ensure the welding quality and welding appearance.

[0081] Along the vehicle body width extension direction, the middle part of the top cover 1 is higher than both ends of the top cover 1. Along the vehicle body length extension direction, the rear end of the top cover 1 is higher than the front end of the top cover 1, which is coordinated with the first diversion groove 2 and the second diversion groove 3 formed on the top cover 1. The length extension direction of the first diversion groove 2 is the same as the vehicle body width extension direction, and the length extension direction of the second diversion groove 3 is the same as the vehicle body length extension direction. The water outlets of the first diversion groove 2 and the second diversion groove 3 are both used to communicate with the A-pillar, ensuring that the condensed water can flow to the A-pillar and be discharged from the drainage groove at the bottom of the A-pillar out of the cab.

[0082] Specifically, the top cover 1 further includes an outer front cross beam 11 of the top cover. As Figure 8 shown, a first diversion groove 2 is formed between the connection of the outer front cross beam 11 of the top cover and the front top cover plate 10; as Figure 13 shown, the top cover 1 further includes an outer upper side cross beam 13 and a door frame 18, and a second diversion groove 3 is formed between the connection of the outer upper side cross beam 13, the door frame 18 and the side top cover plate 14.

[0083] The front cross beam assembly of the top cover 1 includes an outer front cross beam 11 of the top cover and a front cross beam 19 of the top cover. It is first welded to the side wall beam assembly and the rear wall beam assembly of the cab assembly, etc., to form a circumferential ring beam at the top of the cab; then, all the remaining parts of the top cover 1 are welded into a top cover assembly, including all the remaining top cover beams, and the outer covering parts of the top cover, including the front top cover plate 10, the left / right side top cover plates 14, the middle top cover plate 15, and the upper part of the rear wall outer plate with flange edge spot welding - 16, which are laser welded into a whole; after all the above - mentioned top cover beams and outer covering parts are welded into a whole, they vertically fall from the air onto the cab assembly welding line from top to bottom, and then are welded to the front cross beam assembly of the top cover to form the cab assembly; therefore, only a first diversion groove 2 with an inward depression and a size of R5 can be designed on the top cover beam between the front top cover plate 10 and the outer front cross beam 11 of the top cover, which can prevent the applied sealant from being wiped off by the vertically falling top cover 1 plate; along the width direction of the vehicle body structure, the first diversion groove 2 runs through the entire outer front cross beam 11 of the top cover from left to right. The inner wall of the first diversion groove 2 is a first sealant application part 20. Sealant is applied at the first sealant application part 20. After the sealant is applied, heated in the drying furnace, and foamed and expanded, it fills the front top cover plate 10 and the outer front cross beam 11 of the top cover, blocking the condensed water flowing down from the top cover 1 plate, and forming a first diversion structure that guides the condensed water from the highest point in the middle of the front windshield stop to the left and right A - pillars. The middle part of the first diversion structure is higher than the two ends of the first diversion structure, so that the condensed water flows to the left and right A - pillars respectively to the left and right.

[0084] The top cover 1 further includes a side outer upper cross beam 13 and a door frame 18. A second drainage groove 3 is formed between the connection points of the side outer upper cross beam 13 and the door frame 18 with the side top cover plate 14. Specifically, the side outer upper cross beam 13 includes a left side outer upper cross beam 13 and a right side outer upper cross beam 13, and the door frame 18 includes a left door frame and a right door frame. A second drainage groove 3 is designed between the left side outer upper cross beam 13, the left side top cover plate and the left door frame, and a second drainage groove 3 is designed between the right side outer upper cross beam 13, the right side top cover plate and the right door frame. The inner wall of the second drainage groove 3 is a second gluing part 30. Along the length direction of the vehicle body structure, a sealing strip is applied along the second drainage groove 3 from front to back, that is, sealant is applied to the second gluing part 30. After the sealant is applied, heated in a drying furnace, and expanded by foaming, it fills the left side outer upper cross beam 13, the left door frame, the right side outer upper cross beam 13, and the right door frame, blocking the condensed water flowing down from the side top cover plate 14. And the condensed water forms a second drainage structure along the glue line from the highest point at the rear end, and along the length direction of the vehicle body structure, it flows towards the front end of the top cover 1 to the left and right A-pillars. At the same time, in order to prevent outdoor rainwater from entering the cab interior through the gaps between the left door frame, the left side top cover plate, the right door frame, and the right side top cover plate, sealant is also applied between the left door frame, the left side top cover plate, the right door frame, and the right side top cover plate.

[0085] On the basis of the above embodiments, in this embodiment, in order to further improve the drainage effect of the condensed water inside the cab, as Figure 16 、 17 shown, a third drainage groove 51 is further provided on the vehicle body structure. At the same time, the vehicle body structure further includes a floor 6, and a drain hole 60 is opened on the floor 6. The length extension direction of the third drainage groove 51 is the same as the width extension direction of the vehicle body. Through the third drainage groove 51, water can be guided from the rear outer panel - upper 16 to the floor 6, and discharged from the cab through the drain hole 60 of the floor 6.

[0086] Specifically, the vehicle body structure further includes an outer rear panel 5, which is disposed at the bottom end of the upper outer rear panel 16. The outer rear panel 5 is fixed to the upper outer rear panel 16 by spot welding. A rear windshield reinforcement plate 50 is provided on the outer rear panel 5, and a third diversion groove 51 is formed between the rear windshield reinforcement plate 50 and the outer rear panel 5. The rear windshield reinforcement plate 50 is set to be higher in the middle and lower at both ends, so that condensed water can flow along the third diversion groove 51 towards the floor 6. Along the width direction of the vehicle body structure, the third diversion groove 51 penetrates through the rear windshield reinforcement plate 50 from left to right. The inside of the third diversion groove 51 is coated with sealant, and the inner wall of the third diversion groove 51 is a fourth sealant application part 52. Sealant is applied at the fourth sealant application part 52. After being coated, heated in a drying furnace, and foamed and swollen, the sealant fills the space between the rear windshield reinforcement plate 50 and the outer rear panel 5, blocking the condensed water flowing down from the upper outer rear panel 16, and forming a third diversion structure that guides the condensed water from the highest point in the middle of the rear windshield reinforcement plate 50 to the left and right sides of the rear windshield reinforcement plate 50. The middle part of the third diversion structure is higher than both ends of the third diversion structure, so that the condensed water flows left and right respectively towards the drain holes 60 of the floor 6 and is discharged from the cab.

[0087] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0088] It should be noted that in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise", or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device including a series of elements not only includes those elements, but also includes other elements that are not clearly listed, or further includes elements inherent to such process, method, article, or device. Without more limitations, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article, or device including the said element.

[0089] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A vehicle body structure, characterized in that, It includes: a roof panel (1). Along the vehicle body width extension direction, the middle part of the roof panel (1) is higher than both ends of the roof panel (1). Along the vehicle body length extension direction, the rear end of the roof panel (1) is higher than the front end of the roof panel (1). A first diversion groove (2) and a second diversion groove (3) are formed on the roof panel (1). The length extension direction of the first diversion groove (2) is the same as the vehicle body width extension direction. The length extension direction of the second diversion groove (3) is the same as the vehicle body length extension direction. The water outlets of the first diversion groove (2) and the second diversion groove (3) are both used to communicate with the A-pillar; A third diversion groove (51) is further provided on this vehicle body structure. The length extension direction of the third diversion groove (51) is the same as the vehicle body width extension direction; This vehicle body structure further includes a rear outer panel (5). The rear outer panel (5) is arranged at the bottom end of the upper rear outer panel (16). A rear windshield reinforcement plate (50) is provided on the rear outer panel (5). A third diversion groove (51) is formed between the rear windshield reinforcement plate (50) and the rear outer panel (5); The roof panel (1) further includes a side outer upper cross member (13) and a door frame (18). A second diversion groove (3) is formed between the connection positions of the side outer upper cross member (13), the door frame (18) and the side roof cover plate (14). Sealant is coated inside the second diversion groove (3). Sealant is coated between the side roof cover plate (14) and the door frame (18).

2. The vehicle body structure according to claim 1, wherein: The roof panel (1) includes a front roof cover plate (10), side roof cover plates (14), a middle roof cover plate (15) and an upper rear outer panel (16). The middle roof cover plate (15) is fixedly welded to the upper rear outer panel (16). The front roof cover plate (10) is welded to the front end of the middle roof cover plate (15). The side roof cover plates (14) are welded to both ends of the middle roof cover plate (15). One end of the side roof cover plate (14) is fixedly welded to the rear end of the front roof cover plate (10).

3. The vehicle body structure according to claim 2, wherein: The middle roof cover plate (15) is higher than the side roof cover plates (14), and the middle roof cover plate (15) is higher than the front roof cover plate (10).

4. The vehicle body structure according to claim 2, wherein: Reinforcing ribs (17) are provided on the roof panel (1). The length extension direction of the reinforcing ribs (17) is the same as the vehicle body length extension direction.

5. The vehicle body structure according to claim 2, wherein: The roof panel (1) further includes an outer front roof cross member plate (11). A first diversion groove (2) is formed between the connection position of the outer front roof cross member plate (11) and the front roof cover plate (10). Sealant is coated inside the first diversion groove (2).

6. The vehicle body structure according to claim 1, wherein: A water flow hole (12) is formed on the roof panel (1). The water flow hole (12) is located between the water outlet of the first diversion groove (2) and the water outlet of the second diversion groove (3). The water flow hole (12) is used to communicate with the A-pillar.

7. A vehicle, characterized in that: It includes the vehicle body structure according to any one of claims 1-6.

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