CN218287895U - Cover and front bumper's seam seal structure and vehicle - Google Patents

Abstract

The utility model provides a cover and front bumper seam sealing structure and a vehicle, comprising a front bumper, a cabin front cover plate, a cover and a sealing strip; the edge of the top of the front bumper is provided with a flanging structure which is bent towards the oblique lower part inside the engine room; the front end of the front cover plate of the engine room is fixedly lapped with the flanging structure; the front end edge of the cover is butted with the top edge of the front bumper and is provided with a parting joint, and the front end edge of the cover is flush with or lower than the top edge of the front bumper; the sealing strip is fixedly connected to the flanging structure and used for plugging the parting joint; the parting joint is positioned in a positive wind pressure area or a positive and negative wind pressure dividing area of a windward side at the front part of the vehicle body. The utility model provides a cover and front bumper's seam seal structure and vehicle can improve the wind noise and the whistle problem of the high-speed in-process that traveles of vehicle, very big promotion silence nature and passenger's riding experience in the car.

Description

Cover and front bumper's seam seal structure and vehicle

Technical Field

The utility model belongs to the technical field of the car, concretely relates to cover and front bumper's seam seal structure and vehicle.

Background

With the development of the automobile industry, new energy vehicle types are increased, a power assembly is changed, and a traditional engine is replaced by a motor, so that the noise level of the power assembly is obviously improved, but for passengers in an automobile, after the masking effect of a fuel engine noise source is lost, high-speed whistle problems caused by unreasonable structural design are particularly prominent, and particularly in the transition region of a cover and a front bumper which are used as main airflow transition parts at the front part of the automobile, whistle risks are easily caused by unreasonable structural design.

Because the cover is the switching piece, therefore there is the requirement for the design clearance between cover and the bumper, and adopt the cover to withhold the overlap joint mode that the bumper upper edge formed the micro-segment difference, simultaneously in order to avoid the air current to enter the cabin through the design clearance and produce the whistle sound, the design clearance is sealed again through the sealed strip of paper used for sealing, but because only consider the whistle sound problem that the air current got into the automobile body inside from the automobile body structure outside during high-speed driving, do not consider the whistle sound problem that the air current was produced to the automobile body outside by the inside inverse suction of automobile body structure, form little cavity between sealing strip section structure itself and the cover inner panel and the front bumper installation face, thereby formed the condition that produces new whistle sound and form, because the whistle sound problem is single-frequency or narrow-frequency noise usually, the passenger is very easily perceived in the car, and difficult through separating the sound absorption scheme to solve the whistle sound problem, to the influence that the experience was experienced to the vehicle is very big, need solve urgently.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a cover and front bumper's seam seal structure and vehicle aims at solving the high-speed wind of vehicle and makes an uproar and whistle sound problem.

In order to achieve the purpose, the utility model adopts the technical proposal that: in a first aspect, a joint sealing structure of a machine cover and a front bumper is provided, and comprises the front bumper, a front cover plate of a cabin, the machine cover and a sealing strip; the edge of the top of the front bumper is provided with a flanging structure which is bent towards the oblique lower part inside the engine room; the front end of the front cover plate of the engine room is fixedly lapped with the flanging structure; the front end edge of the cover is butted with the top edge of the front bumper and is provided with a parting joint, and the front end edge of the cover is flush with or lower than the top edge of the front bumper; the sealing strip is fixedly connected to the flanging structure and used for plugging parting seams.

With reference to the first aspect, in one possible implementation manner, the parting joint is located in a positive wind pressure area or a positive and negative wind pressure dividing area of a windward side of the front portion of the vehicle body.

In some embodiments, the flanging structure comprises a first transition surface, a first mounting surface, a second transition surface and a second mounting surface which are connected in sequence; the first mounting surface is a horizontal plane lower than the top edge of the front bumper, the first transition surface is an inclined plane connecting the top edge of the front bumper and the first mounting surface, the second mounting surface is a horizontal plane lower than the first mounting surface, and the second transition surface is an inclined plane connecting the first mounting surface and the second mounting surface; the sealing strip is arranged on the first installation surface, and the front end of the front cover plate of the engine room is lapped on the second installation surface.

In some embodiments, the sealing strip includes a sealing arc surface, a first connecting surface, a second connecting surface, and a third connecting surface, which are sequentially connected to form a cavity, wherein the first connecting surface is an inclined surface parallel to the first transition surface, the first connecting surface is overlapped with one side edge of the sealing arc surface to form a first sealing lip, the second connecting surface is a horizontal surface located below the sealing arc surface, the second connecting surface is fixedly attached to the first mounting surface, the third connecting surface is an inclined surface opposite to the inclination direction of the first connecting surface, the third connecting surface is overlapped with the other side edge of the sealing arc surface to form a second sealing lip, the sealing arc surface abuts against the inner surface of the cover, the first sealing lip abuts against the upper edge of the first transition surface, and the second sealing lip abuts against the upper surface of the front cover plate of the engine room.

Illustratively, a gap of 0.3-0.5 mm is formed between the first connecting surface and the first transition surface, the connecting part of the first connecting surface and the sealing arc surface is a weakened area with reduced thickness, a pressing deformation amount of 0.3-1 mm is formed between the first sealing lip and the first transition surface, and a pressing deformation amount of 0.3-1 mm is formed between the second sealing lip and the front upper plate surface of the front cover plate of the engine room.

In some embodiments, the difference in area between the first mounting surface and the second mounting surface corresponds to a forward end thickness of the nacelle forward cover.

Illustratively, a plurality of first mounting holes are distributed on the first mounting surface at intervals, a plurality of first connecting pieces extending downwards are distributed on the sealing strip at intervals, and each first connecting piece is connected with each first mounting hole in a one-to-one correspondence manner.

For example, a plurality of second mounting holes are distributed on the second mounting surface at intervals, a plurality of second connecting pieces extending downwards are distributed at intervals at the front end of the front cover plate of the engine room, and each second connecting piece is correspondingly connected with each second mounting hole one by one.

In some embodiments, the cover comprises an outer plate and an inner plate, wherein the front end edge of the outer plate is provided with a folded edge, the front end edge of the inner plate is clamped between the folded edge and the inner wall of the outer plate, the edge of the folded edge is welded and fixed with the inner plate and coated with a welding seam sealant, and at least part of the welding seam sealant is abutted and sealed with the sealing strip.

The utility model provides a cover and front bumper's seam seal structure's beneficial effect lies in: compared with the prior art, the utility model discloses the seam seal structure of cover and front bumper, cover front end border adopts butt-joint structural and forms the typing seam with the top border of front bumper, the front end border of guaranteeing the cover is less than the top border of preceding bumper with the top border parallel and level of preceding bumper or the front end border of cover, can avoid vehicle windward air current to take place to break away from when flowing to cover front end border through the bumper surface, thereby reduce the wind noise under the high-speed driving state, because the sealing strip can shutoff typing seam, consequently, can avoid the air current to get into the cabin and produce the whistle sound, big recess appears in the joint area of cover front end border and bumper top border can be avoided in the shutoff of butt-joint structural cooperation sealing strip simultaneously, and then reduce or eliminate the whistle sound that the air current produced when getting into the recess, improve wind noise and whistle sound problem among the vehicle high-speed driving process, quiet nature and passenger's riding experience in very big promotion car.

The second aspect, the embodiment of the utility model provides a still provides a car, including the seam seal structure of above-mentioned cover and front bumper, have the same beneficial effect with the seam seal structure of above-mentioned cover and front bumper, no longer describe herein.

Drawings

Fig. 1 is a front view schematically illustrating a seam sealing structure of a cover and a front bumper according to an embodiment of the present invention;

FIG. 2 isbase:Sub>A schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic view of a portion of the enlarged structure at B in FIG. 2;

FIG. 4 is a schematic cross-sectional view of a sealing strip used in the embodiment of the present invention;

fig. 5 is a schematic top view of a front bumper according to an embodiment of the present invention;

fig. 6 is a schematic cross-sectional view of the front end of the cover according to the embodiment of the present invention;

fig. 7 is a schematic view showing a wind pressure distribution on the windward side of the front portion of the vehicle body in a high-speed running state.

In the figure: 10. a front bumper; 11. a flanging structure; 111. a first transition surface; 112. a first mounting surface; 1121. a first mounting hole; 113. a second transition surface; 114. a second mounting surface; 1141. a second mounting hole; 20. a nacelle front cover; 30. a machine cover; 31. an outer plate; 311. folding edges; 32. an inner plate; 33. welding seam sealant; 40. a sealing strip; 41. a first connection face; 411. a weakened region; 42. a second connection face; 43. a third connection surface; 44. sealing the arc surface; 45. a first seal lip; 46. a second sealing lip; 47. a first connecting member; 50. parting the seams.

Detailed Description

In order to make the technical problem, technical solution and beneficial effects to be solved by the present invention more clearly understood, the following description is made in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or be indirectly on the other element. It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the following embodiments and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the following embodiments, for example, the front end of the nacelle cowl refers to the portion of the nacelle cowl forward in the vehicle body X, and the top edge of the front bumper refers to the upper boundary of the front bumper. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or several of that feature. In the description of the following examples, "plurality" or "a plurality" means two or more unless specifically limited otherwise. In the following description of the embodiments, the X direction refers to the longitudinal direction of the vehicle body in the front-rear direction, the Y direction refers to the lateral width direction of the vehicle body, and the Z direction refers to the vertical direction, which is the vertical direction, of the vehicle body in the vertical height direction.

Referring to fig. 1 to 7, a seam sealing structure of a cover and a front bumper according to the present invention will be described. The joint sealing structure of the machine cover and the front bumper comprises a front bumper 10, a front cover plate 20 of the engine room, a machine cover 30 and a sealing strip 40; the edge of the top of the front bumper 10 is provided with a flanging structure 11 which is bent towards the oblique lower part inside the engine room; the front end of the engine room front cover plate 20 is lapped and fixed with the flanging structure 11; the front end edge of the cover 30 is butted with the top edge of the front bumper 10 and is provided with a parting seam 50, and the front end edge of the cover 30 is flush with or lower than the top edge of the front bumper 10; the sealing strip 40 is fixedly connected to the flange structure 11 for sealing the parting joint 50.

It should be understood that the front end edge of the cover 30 and the top edge of the front bumper 10 are butted against each other, and it is preferable that they are flush with each other without a step difference, and in consideration of the processing and assembling accuracy, the front end edge of the cover 30 is allowed to be slightly lower than the top edge of the front bumper 10, so that the generation of a windward step is prevented to cause separation of the air flow, thereby reducing the wind noise.

In addition, it should be noted that, the top edge of the front bumper 10 is bent to the oblique lower side in the cabin to form the flanging structure 11, so as to provide an installation space and a front end fixing space of the cabin front cover plate 20 for the sealing strip 40, and meanwhile, the abutting sealing effect of the sealing strip 40 and the flanging structure 11 and the inner wall of the cover 30 can be utilized, so that the abutting structure of the front end edge of the cover 30 and the top edge of the front bumper 10 is matched, a relatively shallower and more regular groove structure is formed in the parting joint 50, and thus the wind noise generated when the air flow enters the groove can be reduced.

Compared with the prior art, the joint sealing structure of the cover and the front bumper provided by the embodiment has the advantages that the front end edge of the cover 30 and the top edge of the front bumper 10 adopt a butt joint structure to form the parting joint 50, the front end edge of the cover 30 is flush with the top edge of the front bumper or the front end edge of the cover 30 is lower than the top edge of the front bumper, the separation of the vehicle windward airflow flowing upwards to the front end edge of the cover 30 through the surface of the bumper can be avoided, so that the wind noise in a high-speed driving state is reduced, the parting joint 50 can be blocked by the sealing strip 40, the airflow can be prevented from entering the cabin to generate whistle, meanwhile, the joint structure and the sealing strip 40 can be used for preventing a large groove from being formed in a joint area of the front end edge of the cover 30 and the top edge of the bumper, the whistle generated when the airflow enters the groove is reduced or eliminated, the problems of the wind noise and the whistle in the high-speed driving process of the vehicle are improved, and the quiet experience in the vehicle and the passenger riding experience in the vehicle are greatly improved.

In some possible implementations, please refer to fig. 1 and 7, it can be understood that the parting joint 50 is located in a positive wind pressure area or a positive and negative wind pressure dividing area of the windward side of the front portion of the vehicle body.

It should be explained that the speed and acceleration of the air flow in different surface areas of the vehicle body are different during high speed driving of the vehicle, and the pressure on the surface of the vehicle body is also different. The method comprises the steps of simulating a driving state under a high-speed working condition, carrying out simulation analysis on the surface pressure of a vehicle body, determining critical points of positive airflow pressure and negative airflow pressure at the front part of the vehicle body (mainly areas of a front bumper 10 and a machine cover 30) by analyzing the surface pressure of the vehicle type (see fig. 7, an arrow area is a positive pressure area, and a dotted arrow area is a negative pressure area), arranging a parting joint 50 of the machine cover 30 and the front bumper 10 in the positive pressure area or a positive and negative pressure dividing area, preferably in a positive pressure area close to the positive and negative pressure critical points, and avoiding whistle noise caused by negative pressure airflow suck back.

In some embodiments, referring to fig. 3, the flanging structure 11 includes a first transition surface 111, a first installation surface 112, a second transition surface 113, and a second installation surface 114 connected in sequence; wherein, the first mounting surface 112 is a horizontal plane lower than the top edge of the front bumper 10, the first transition surface 111 is an inclined plane connecting the top edge of the front bumper 10 and the first mounting surface 112, the second mounting surface 114 is a horizontal plane lower than the first mounting surface 112, and the second transition surface 113 is an inclined plane connecting the first mounting surface 112 and the second mounting surface 114; the weather strip 40 is provided on the first mounting surface 112, and the front end of the nacelle cowl 20 is lapped on the second mounting surface 114.

The flange structure 11 can be understood as a two-step structure, the first mounting surface 112 and the second mounting surface 114 serve as two step surfaces to provide a mounting base for the weather strip 40 and the front end of the nacelle front cover plate 20, the first transition surface 111 serves as a connecting portion of the first mounting surface 112 and the top edge of the front bumper 10, and the second transition surface 113 serves as a connecting portion of the second mounting surface 114 and the first mounting surface 112, so that the weather strip 40 and the nacelle front cover plate 20 are fixed on the same component without interference, and the mounting structure is simple and compact.

As an embodiment of the above-mentioned weather strip 40, please refer to fig. 3 and 4, the weather strip 40 includes a sealing arc surface 44, a first connecting surface 41, a second connecting surface 42, and a third connecting surface 43, which are sequentially connected to form a cavity, wherein the first connecting surface 41 is an inclined surface parallel to the first transition surface 111, the first connecting surface 41 and one side edge of the sealing arc surface 44 are overlapped to form a first sealing lip 45, the second connecting surface 42 is a horizontal surface located below the sealing arc surface 44, the second connecting surface 42 and the first mounting surface 112 are fixedly attached, the third connecting surface 43 is an inclined surface opposite to the inclination direction of the first connecting surface 41, the third connecting surface 43 and the other side edge of the sealing arc surface 44 are overlapped to form a second sealing lip 46, the sealing arc surface 44 abuts against the inner surface of the cover 30, the first sealing lip 45 abuts against the upper edge of the first transition surface 111, and the second sealing lip 46 abuts against the upper plate surface of the front cover plate 20.

Specifically, the first connection surface 41 is connected to the inner arc surface at the front end of the arc sealing surface 44, and the second connection surface 42 is connected to the inner arc surface at the rear end of the arc sealing surface 44, so that the first sealing lip 45 and the second sealing lip 46 are respectively of a duckbill structure formed on the basis of the front and rear edges of the arc sealing surface 44, and particularly for the first sealing lip 45, the structure can enable the first sealing lip 45 to be stably buckled on the upper edge of the first transition surface 111 (i.e., the bending position of the top edge of the front bumper 10 and the first transition surface 111), so that an upward supporting force is formed on the front side of the sealing strip 40, and the second sealing lip 46 abutting against the upper plate surface at the front end of the front cabin cover plate 20 can provide an upward supporting force on the rear side of the sealing strip 40, so as to provide a sufficient stress point for the sealing strip 40, and avoid the situation that the sealing strip 40 is entirely collapsed and poor sealing is caused when the cover 30 abuts against the arc sealing surface 44.

The sealing strip 40 can be understood as a hollow adhesive tape, the end surface shape of the sealing strip is close to the trapezoidal structure with the narrow top width and the cambered top wall, wherein the sealing position between the sealing strip 40 and the inner wall of the cover 30 is a cambered surface structure, namely a sealing cambered surface 44, when the cover 30 is closed, the sealing cambered surface 44 is pressed and deformed and is pressed against the inner wall of the cover 30, and meanwhile, a certain supporting force is provided for the sealing cambered surface 44 by utilizing the first connecting surface 41 and the second connecting surface 42, so that the deformation is concentrated on the sealing cambered surface 44 when the cover 30 is pressed against the sealing cambered surface 44, and the sealing strip 40 is prevented from being pressed and collapsed.

For example, referring to fig. 3, a gap D2 of 0.3mm to 0.5mm is formed between the first connecting surface 41 and the first transition surface 111, a compression deformation D1 of 0.3mm to 1mm is formed between the first sealing lip 45 and the first transition surface 111, and a compression deformation D3 of 0.3mm to 1mm is formed between the second sealing lip 46 and the front end upper plate surface of the nacelle front cover 20.

Through setting up reasonable clearance D2 between first connecting face 41 and first transition face 111, cooperate the deformation D1 of bearing (namely interference fit interference amount between the two) between first seal lip 45 and the first transition face 111 simultaneously to can guarantee that first seal lip 45 can the compressive deformation and closely laminate with first transition face 111 when the cover 30 pushes down, equally, deformation D3 of bearing between the front end upper plate face of second seal lip 46 and cabin front shroud 20 also can guarantee that second seal lip 46 is the compressive deformation and closely laminate with the front end upper plate face of cover 30 front shroud under the cover 30 pushes down the effect, thereby improve sealed effect.

In some possible implementations, referring to fig. 4, the portion where the first connection surface 41 is connected to the sealing arc surface 44 is a weakened area 411 with a reduced thickness. The thickness of the sealing strip 40 is preferably 1.5 mm-2 mm, that is, the wall thicknesses of the first connecting surface 41, the second connecting surface 42, the third connecting surface 43 and the sealing arc surface 44 are all designed to be 1.5 mm-2 mm, and the thinning amount of the part where the second connecting surface 42 is connected with the sealing arc surface 44 is preferably 0.5mm, so that the supporting strength of the part is weakened, and because the area of the sealing arc surface 44 close to the part is opposite to the parting joint 50, when the cover 30 closes and presses the sealing strip 40, the deformation amount of the part of the sealing arc surface 44 opposite to the parting joint 50 can be reduced through preferential deformation of the weakened part, so that the flatness and smoothness of the sealing arc surface 44 area blocked in the parting joint 50 are ensured, and the whistle risk caused by air flow entering the parting joint 50 is reduced.

In some embodiments, as will be understood with reference to fig. 2 and 3, the first mounting surface 112 and the second mounting surface 114 are perpendicular to the Z direction of the vehicle body, the first mounting surface 112 is higher than the second mounting surface 114, and a surface difference between the first mounting surface 112 and the second mounting surface 114 is consistent with a front end thickness of the nacelle front cover 20. The sealing strip 40 and the cabin front cover plate 20 can be installed upwards and downwards along the Z direction, operation is convenient and labor-saving, and the front end of the cabin front cover plate 20 and the first installation surface 112 can be located on the same horizontal plane after installation is completed, so that the sealing strip 40 can conveniently form a gap between the front end of the cabin front cover plate 20 and the second transition surface 113 (or the first installation surface 112), and attractiveness and dustproof effects are improved.

Specifically, referring to fig. 3 and 5, in the embodiment, a plurality of first mounting holes 1121 are distributed at intervals on the first mounting surface 112, a plurality of first connecting pieces 47 extending downward are distributed at intervals on the sealing strip 40, and each first connecting piece 47 is connected to each first mounting hole 1121 in a one-to-one correspondence manner. The first connecting member 47 may be a cylindrical buckle with an inclined plane claw self-locking structure, or the first connecting member 47 adopts a mushroom buckle structure, and when the sealing strip 40 is installed, the first connecting member 47 is directly inserted into the corresponding first installation hole 1121, so that the operation is simple and convenient, and the connection is reliable.

It should be understood that, referring to fig. 5, in the present embodiment, a plurality of second mounting holes 1141 are spaced apart from each other on the second mounting surface 114, and a plurality of second connecting members (not shown) extending downward are spaced apart from each other on the front end of the nacelle front cover 20, and each of the second connecting members is correspondingly connected to each of the second mounting holes 1141. The second mounting hole 1141 may be a threaded hole, the second connecting member is a screw, and the second connecting member directly penetrates through the front end plate surface of the nacelle front cover plate 20 and then is screwed with the corresponding second mounting hole 1141 for fixation, so that the connection is stable and reliable, and the operation is convenient.

Referring to fig. 3 and 6, the cover 30 includes an outer plate 31 and an inner plate 32, a folded edge 311 is disposed on a front end edge of the outer plate 31, the front end edge of the inner plate 32 is sandwiched between the folded edge 311 and an inner wall of the outer plate 31, an edge of the folded edge 311 and the inner plate 32 are welded and fixed and coated with a weld sealant 33, and at least a portion of the weld sealant 33 abuts against and seals the sealing strip 40. The front end edge of the outer plate 31 forms a double-layer sheet metal structure through the bent folded edge 311, the overall structural strength of the front end edge of the cover 30 can be improved, meanwhile, the folded edge 311 is used for forming a coating effect on the front end edge of the inner plate 32, the edge of the inner plate 32 is prevented from being exposed, the edge of the folded edge 311 is welded with the inner plate 32, welding seam sealant 33 is coated along a welding seam after being welded, accordingly, air flow is prevented from entering a gap between the inner plate 32 and the inner wall of the outer plate 31 to generate noise, the welding seam sealant 33 can be coated with a width area of 8 mm-12 mm by taking the edge of the folded edge 311 (namely the center position of the welding seam) as the center, reliable sealing of the welding seam is ensured, meanwhile, a part (preferably half width) area of the welding seam sealant 33 is abutted against the sealing strip 40, and in cooperation with the abutting between the sealing strip 40 and the front end edge of the cover 30, air flow can be prevented from entering a small-sized cavity defined by the front end edge of the cover 30 and the boundary of the welding seam sealant 33 to generate whistle, the width of a sealing contact area can be improved, and the sealing effect is improved.

Based on the same inventive concept, as understood in conjunction with fig. 1 to 7, the embodiment of the present application further provides an automobile, which includes the seam sealing structure of the cover and the front bumper. The front end edge of the cover 30 and the top edge of the front bumper 10 adopt a butt joint structure to form a parting seam 50, the front end edge of the cover 30 is enabled to be flush with the top edge of the front bumper or the front end edge of the cover 30 is lower than the top edge of the front bumper, the separation of the vehicle from the wind stream flowing upwards to the front end edge of the cover 30 through the surface of the bumper can be avoided, thereby reducing the wind noise in a high-speed driving state, because the sealing strip 40 can seal the parting seam 50, the generation of whistle when the air stream enters the cabin can be avoided, meanwhile, the butt joint structure is matched with the sealing strip 40 to seal the joint area between the front end edge of the cover 30 and the top edge of the bumper to form a large groove, the whistle generated when the air stream enters the groove is reduced or eliminated, the wind noise and whistle problems in the high-speed driving process of the vehicle are improved, and the silence in the vehicle and the riding experience of passengers are greatly improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims (10)

1. Cover and front bumper's seam seal structure, its characterized in that includes:

the top edge of the front bumper (10) is provided with a flanging structure (11) which is bent towards the oblique lower part inside the engine room;

the front end of the engine room front cover plate (20) is fixedly lapped with the flanging structure (11);

a cover (30) having a front end edge abutting the top edge of the front bumper (10) and having a parting joint (50), and the front end edge of the cover (30) being flush with or lower than the top edge of the front bumper (10);

and the sealing strip (40) is fixedly connected to the flanging structure (11) and is used for sealing the parting joint (50).

2. The joint sealing structure of the machine cover and the front bumper according to claim 1, wherein the parting joint (50) is located at a positive wind pressure region or a positive and negative wind pressure boundary region of a windward side of the front portion of the vehicle body.

3. The seaming and sealing structure of a machine cover and a front bumper according to claim 1, characterized in that the flanging structure (11) comprises a first transition surface (111), a first mounting surface (112), a second transition surface (113) and a second mounting surface (114) which are connected in sequence; wherein the first mounting surface (112) is a horizontal surface lower than the top edge of the front bumper (10), the first transition surface (111) is an inclined surface connecting the top edge of the front bumper (10) and the first mounting surface (112), the second mounting surface (114) is a horizontal surface lower than the first mounting surface (112), and the second transition surface (113) is an inclined surface connecting the first mounting surface (112) and the second mounting surface (114); the sealing strip (40) is arranged on the first mounting surface (112), and the front end of the front cover plate (20) of the cabin is lapped on the second mounting surface (114).

4. The cover and front bumper joint sealing structure of claim 3, wherein the sealing strip (40) comprises a sealing arc surface (44), a first connecting surface (41), a second connecting surface (42) and a third connecting surface (43) which are sequentially connected to form a cavity, wherein the first connecting surface (41) is an inclined surface parallel to the first transition surface (111), the first connecting surface (41) is lapped with one side edge of the sealing arc surface (44) to form a first sealing lip (45), the second connecting surface (42) is a horizontal surface below the sealing arc surface (44), the second connecting surface is fixedly attached to the first mounting surface (112), the third connecting surface (43) is an inclined surface opposite to the inclined direction of the first connecting surface (41), the third connecting surface (43) is lapped with the other side edge of the sealing arc surface (44) to form a second sealing lip (46), the sealing arc surface (44) is abutted against the inner surface of the cover (30), the first sealing lip (45) is abutted against the upper edge of the first transition surface (111), and the sealing lip (46) is abutted against the upper edge of the sealing arc surface of the front bumper.

5. The cover and front bumper joint sealing structure according to claim 4, wherein a gap of 0.3mm to 0.5mm is provided between the first connecting surface (41) and the first transition surface (111), a connection portion between the first connecting surface (41) and the sealing arc surface (44) is a weakened area (411) with a reduced thickness, a pressing deformation amount of 0.3mm to 1mm is provided between the first sealing lip (45) and the first transition surface (111), and a pressing deformation amount of 0.3mm to 1mm is provided between the second sealing lip (46) and the front end upper plate surface of the front cover plate (20) of the engine room.

6. The cover and front bumper seam seal structure of claim 3, wherein the difference in area between the first mounting surface (112) and the second mounting surface (114) corresponds to the front end thickness of the nacelle front cover (20).

7. The joint sealing structure of the cover and the front bumper as recited in claim 3, wherein a plurality of first mounting holes (1121) are spaced apart from each other on said first mounting surface (112), a plurality of first connecting members (47) extending downward are spaced apart from each other on said sealing strip (40), and each of said first connecting members (47) is connected to each of said first mounting holes (1121) in a one-to-one correspondence.

8. The cover and front bumper joint sealing structure of claim 3, characterized in that a plurality of second mounting holes (1141) are spaced on the second mounting surface (114), a plurality of second connecting members extending downwards are spaced on the front end of the nacelle front cover plate (20), and each second connecting member is connected with each second mounting hole (1141) in a one-to-one correspondence manner.

9. The joint sealing structure of the cover and the front bumper as recited in any one of claims 1 to 8, wherein the cover (30) comprises an outer plate (31) and an inner plate (32), a folded edge (311) is provided at a front end edge of the outer plate (31), a front end edge of the inner plate (32) is sandwiched between the folded edge (311) and an inner wall of the outer plate (31), an edge of the folded edge (311) is welded to the inner plate (32) and coated with a weld sealant (33), and at least a part of the weld sealant (33) is abutted and sealed with the sealing strip (40).

10. A vehicle characterized by comprising the joint sealing structure of the hood and the front bumper according to any one of claims 1 to 9.

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