CN211642345U - Increase girder of whole NVH ability of vehicle - Google Patents
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- CN211642345U CN211642345U CN201921472351.7U CN201921472351U CN211642345U CN 211642345 U CN211642345 U CN 211642345U CN 201921472351 U CN201921472351 U CN 201921472351U CN 211642345 U CN211642345 U CN 211642345U
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Abstract
The utility model relates to an automobile and automobile parts make the field, especially relate to a girder that increases the whole NVH ability of vehicle. The special arched V-beam structure is arranged, so that the success rate of oil film formation can be automatically increased at the maximum stress stage, and the optimal thickness of the oil film can be controlled, thereby achieving the purpose of eliminating and reducing noise. The left side of the main cross beam is spliced with the left longitudinal beam, and the right side of the main cross beam is spliced with the right longitudinal beam; wherein the following steps: the main beam is formed by integrally stamping or water-swelling and shaping a metal plate body and comprises a front plate, a rear plate and a lower plate, wherein the top of the front plate and the top of the rear plate are connected to form a folded angle top, and the folded angle top is overlapped with the top plate overlapped part bent at the top of the lower plate arranged in a laminated mode below, and the distance between the folded angle top and the top plate overlapped part is not equal to 0 or not equal to 0 but less than 0.2 cm; the X axle line position of guide horn plate portion is provided with the oil filler point, and the oil filler point leads oil towards the inside moulding setting of body and lifts the slope.
Description
Technical Field
The invention relates to the field of automobile and automobile part manufacturing, in particular to a main beam for improving the overall NVH (noise, vibration and harshness) capability of a vehicle.
Background
In the prior art, the main beam is always subjected to extrusion force generated by front and rear humps, torsion force in left and right modes or emergency steering, uneven ground or collision force in all directions caused by large pothole stones and the like due to various types of actions of a vehicle, and when the forces are transmitted to the main beam, the main beam is a hollow main beam, and sound transmitted into the main beam is generated due to a hollow structure of the main beam, part friction, wind sound generated by high-speed flowing wind or internal structure friction of the main beam; the reasons are that the connection with the longitudinal beam is directly generated, for example, an additionally installed component generates various abnormal sounds, the abnormal sounds are a very central part in the overall NVH capability of the vehicle, and are important performances of vehicle purchase, factory quality, comprehensive evaluation and the like, so that common vehicle users commonly generate various regular or irregular abnormal sounds on a chassis during vehicle running, the abnormal sound problem occurs at a low frequency but has strong customer complaints, the problems need to be solved urgently, the abnormal sounds all reveal that the part design or adjustment and the like of a certain area of the vehicle are irrelevant, and because the abnormal sounds need to enter a 4S store for overhaul or preparation, a large number of events of vehicle replacement and overall large-scale recall are seriously occurred, which are very serious things for automobile manufacturers, and the aim of enhancing the overall NVH capability of the vehicle is always pursued in the technical field of automobile manufacturing, therefore, the main beam is subjected to structural treatment and oil film plating treatment in the manufacturing process, so that the purpose of reducing noise is achieved.
Disclosure of Invention
The main beam capable of increasing the overall NVH capacity of the vehicle is provided with the special arched V-beam structure, the success rate of oil film formation can be automatically increased in the maximum stress stage, the optimal thickness of the oil film is controlled, and the purpose of eliminating and reducing noise is achieved.
A main beam for increasing the overall NVH capacity of a vehicle comprises a main cross beam, a left longitudinal beam and a right longitudinal beam, wherein the left side of the main cross beam is spliced with the left longitudinal beam, and the right side of the main cross beam is spliced with the right longitudinal beam; wherein the following steps: the main beam is formed by integrally stamping or water-swelling and shaping a metal plate body and comprises a front plate, a rear plate and a lower plate, wherein the tops of the front plate and the rear plate are connected to form a folded angle top, the front plate and the rear plate are arranged in an inverted V-shaped structure, the bottoms of the front plate and the rear plate are transversely connected with the lower plate, the lower plate is upwards extruded and bulged from the bottom at the central axis position to form a trapezoid or arc or a reversed character-shaped structure and form 3 parts, the folded angle of the top plate at the center and a guide horn plate part extending downwards from the head end to the tail end at the top plate folding position are included, the lower plate is V-shaped or U-shaped in the Y-axis direction, the arc angle of the folded angle top part of the folded angle is at least 120 degrees, the folded angle of the bent position of the lower plate, which is respectively connected with the front plate and the rear plate, in the Y-axis direction is at least 300 degrees, and the inner walls of the front plate, the thickness of the inner wall of the noise reduction oil film layer at the superposition position of the top plate is high, and the thickness of the inner wall of the guide horn plate part is low; the top of a folded corner formed by connecting the tops of the front plate and the rear plate is overlapped with the overlapped part of a top plate bent at the top of the lower plate arranged below in a laminated manner, and the distance between the top of the folded corner and the overlapped part of the top plate is not equal to 0 but less than 0.2 cm;
the X axle line position of guide horn plate portion is provided with the oil filler point, and the oil filler point leads oil towards the inside moulding setting of body and lifts the slope.
Preferably, the V-shaped automobile main beam opening angle is 120 degrees.
And the left longitudinal beam and the right longitudinal beam are preferably arranged on the oil injection hole, and the inclined oil inlet grooves are formed in the positions of the oil injection hole.
Preferably, the front plate and the rear plate are provided with a tapered transverse plate in a flaring structure outwards above the matched guide horn plate, and the head end of the tapered transverse plate is provided with a longitudinal beam top welding engagement piece. The seaming structure can enable the cross beam to be better connected with the longitudinal beam, and the stress transmission is increased.
Preferably, the left longitudinal beam and the right longitudinal beam are of an expanding type pipe longitudinal beam structure with the same structure, and the whole expanding type pipe longitudinal beam structure is in a J shape. Is suitable for light vehicles.
And preferably, bevel connection points are arranged below the front beam bending parts of the left longitudinal beam and the right longitudinal beam, and the head end and the tail end of the main beam are spliced and welded by the respective bevel connection points of the left longitudinal beam and the right longitudinal beam.
And the left longitudinal beam and the right longitudinal beam are preferably arranged on the oil injection hole, and the inclined oil inlet grooves are formed in the positions of the oil injection hole. The structure is mainly characterized in that a groove is formed, so that the oil injection mechanical arm can be inclined inwards when spraying, and whether the oil injection mechanical arm is accurately injected into a spraying position or not can be detected when needed.
Preferably, the main cross beam is provided with a sealing blocking piece at an inner corner formed by assembling the main cross beam with the left longitudinal beam and the right longitudinal beam, the disc wing piece of the spring disc extends forwards to be provided with the sealing blocking piece, and the extending position of the sealing blocking piece is matched with the setting position of the oil hole. The main beam is installed at the sealing separation blade and after the auxiliary assembly assembling process of the main beam assembled with the left longitudinal beam and the right longitudinal beam, the oil filling hole can be directly opened by selecting one of two types, the other type is welded and sealed by a welding gun, the quality of the main beam is not favorable after welding and sealing, namely, the sealing separation blade with the sealing separation blade can be completely attached to the bottom of the outer wall of the main beam and the outer wall of the longitudinal beam from the bottom to completely seal the whole oil filling hole again, and the last 1-point quality hidden danger is eliminated.
Preferably the guide horn plate portion flares outwardly by at least 5 degrees. The guiding horn plate part at least comprises a front plate and a rear plate which are expanded outwards to form a horn mouth structure expanded outwards by 5 degrees, and the lower plate can keep the original shape because of the expansion of the lower plate.
Compared with the prior art, the invention has the beneficial effects that: 1. the invention creates a formed rear torsion beam which has a lower plate inner top part and a top plate overlapping part after double-line overlapping, a lower plate extends downwards from a central main machine at the lower plate inner top part and seals the whole main beam cavity, a trapezoidal horn mouth structure with a guide arch body structure is arranged at the head end and the tail end of a main beam, oil injection holes are exactly arranged at the lower plate at the initial position of the guide arch body structure, the oil injection holes can be intensively guided and sprayed to the axial line position at the lower plate inner top part along with gas and the axial line position is downward 3 cm-12 cm when the gas and noise reduction oil are injected, so that the oil mist is distributed and permeated to the maximum extent, the middle structure enables the oil film plating process to be easy to operate and the realization process method greatly reduces the traditional oil injection film-growing technology which adopts the complex process, has large operation difficulty and has low success rate in the prior art, the situation that oil films are not uniformly distributed and gaps have more oil film distribution points although the oil films are generated in the prior art is eliminated, or the injected noise reduction oil is caused by high heat treatment requirements;
2. the lower plate can be folded in a V shape extremely and is extremely close to the superposed position of the top plate, but the deep formation position of the oil film can be kept, so that even if the clearance of the superposed position of the lower plate and the top plate is very small, after the noise-reducing oil which can automatically depend on the atomized state forms the fully-filled oil film, the noise problem caused by friction at the superposed position of the top plate which is very close to the superposed position of the top plate is solved;
3. the oil film which completely wraps the whole inner wall isolates the front side panel and the rear side panel which are contacted from each other in front and back, and the distance between the front side panel and the rear side panel is close to 0cm, so that the different loudness of the positions is close to 0 decibel as the middle of the whole plate body is close to each other, and the 'friction' sound of the main beam formed by the inner wall of the main beam is completely solved;
4. the whole main beam is extremely low in cost in modeling, an expansion manufacturing process method is adopted, the processing speed is high due to the fact that the technology in the field is well known, abnormal sound of the automobile main beam is greatly reduced, the overall NVH (noise, vibration and harshness) capability of an automobile is greatly improved, the improvement of the capability improves the automobile noise reduction technology to a new step, and higher social benefits are brought, for example, the large-scale recall event caused by the abnormal sound is adopted, the loss possibly caused by automobile manufacturers is greatly avoided, and the market competitiveness generated by our factory is greatly improved.
Drawings
FIG. 1 is an overall plan view;
FIG. 2 is a side perspective view of the main beam;
FIG. 3 is a front cross-sectional view of the main beam and stringer connection;
FIG. 4 is a cross-sectional view of the head and tail ends of the A-A main beam along the x-axis;
FIG. 5 is an enlarged view of the oil film structure;
FIG. 6 is a structural view of the connection between the leading horn plate and the longitudinal beam at the head end of the main beam B-B;
FIG. 7 is a cross-sectional view of the main cross member and the longitudinal member at C-C;
FIG. 8 is a view of the main cross member and longitudinal members and their assembly;
FIG. 9 is an embodiment view of the spray state of the oil hole;
FIG. 10 is a view of the spring holder embodiment 2;
in the figure: the novel oil guide plate comprises a main cross beam (1), a left longitudinal beam (2), a right longitudinal beam (3), a front square plate (4), a rear square plate (5), a lower square plate (6), a top plate superposition part (7), a guide horn plate part (8), a noise reduction oil film layer (9), an oil filling hole (10), an oil guide lifting slope (11), a dog-ear connecting point (12), a dog-ear top (13), an oblique oil inlet groove (14), an inner corner part (15), a spring disc (16), a sealing blocking piece (17), a conical transverse plate (18) and a longitudinal beam top welding blocking piece (19).
Detailed Description
The technical scheme of the utility model is described as the preferred concrete through the embodiment and with the attached drawings:
example 1
As shown in figure 1, the structure of the main beam is mainly developed on the expansion beam technology, and the main beam for increasing the overall NVH capacity of a vehicle comprises a main beam (1), a left longitudinal beam (2) and a right longitudinal beam (3), wherein the left longitudinal beam (2) is arranged on the left side of the main beam (1) in a splicing mode, and the right longitudinal beam (3) is arranged on the right side in a splicing mode;
wherein the following steps: continuing to refer to fig. 1 and 2, the main beam (1) is formed by integrally stamping or water expansion molding a metal plate body or a metal pipe, wherein a whole metal pipe with high manufacturing speed is selected for expansion, the expansion is triangular, so that a front plate (4) inclining 45 degrees backwards at the left side shown in fig. 2 is formed, the top of the front plate (4) is connected with the top of a rear plate (5), the rear plate (5) inclining 45 degrees forwards is bent backwards from the top of the front plate (4), the front plate (4) and the rear plate (5) are extruded into an inverted V-shaped structure, and then the inverted V-shaped structure is connected with a lower plate (6) arranged at the bottom of the front plate (4) and the rear plate and arranged at the bottom of the rear plate, so that the conventional circular pipe can be extruded into a triangular pipe body with 1 right-angle cross section;
then, the expanding processing is carried out, as shown in fig. 2, the lower plate is extruded upwards by water expanding at the outer side position of the outer wall from the central transverse axis position of the bottom, and the central extrusion stress is the most, so that the lower plate (6) is transversely connected with the bottom of the front plate and the rear plate of the lower plate, the lower plate is formed into a Y-axis direction cross section which is a trapezoid or arc or a structure with two sides being downward arcs and the top being transverse straight by the bottom upwards extruding bulge at the central axis position of the Y-axis surface, and 3 parts are formed, including a central top plate overlapping part (7) and guide horn plate parts (8) extending downwards at the head end and the tail end of the top plate overlapping part (7);
the cross section of the processed lower plate (6) in the Y-axis direction is in a V shape as shown in figures 3 and 4, the arc angle of the folded angle top (13) is at least 120 degrees, and the folded angle of the bent position where the lower plate in the X-axis direction is respectively connected with the front plate (4) and the rear plate (5) is at least 300 degrees; the structure that the convex part of the plate body of the lower plate (6) at the top is infinitely close to the folded angle top (13) from the bottom is formed, and the round or water drop-shaped cavity structure is formed after the lower plate (6) at the bottom and the front plate (4) or the rear plate (5) are extruded, expanded and bent;
the arrangement is that the main beam can achieve a nearly complete double-layer structure, the bottom of the main beam needs to be increased in distance thickness due to the fact that oil or oil mist is led in, and a larger stress mode can be achieved when the front side and the rear side of the main beam are stressed, as shown in fig. 2, if the stress comes from the right side, the stress surface is at least 150 degrees, and if the stress is set to be 120 degrees of the folded angle top (13), the stress is estimated to be only 60-40 degrees, and the arrangement is not beneficial to stress conduction and impact resistance of the main beam (1);
finally, in order to lead noise reduction oil into the main beam (1), oil injection holes (10) are arranged at the central axis position of the X axis of a lower plate (6) of the guide horn plate part (8) of the main beam (1), namely the head end and the tail end of the main beam, oil guide lifting slopes (11) are formed in a shaping mode towards the inside of the pipe body by taking the oil injection holes (10) as head end starting points, the oil guide lifting slopes (11) are a structure which is formed by extruding and expanding the lower plate (6) at the bottom position of the guide horn plate part (8) to form a circular arch body shaping mode, the oil guide lifting slopes mainly expand from front to back to form a slow front slope and a large opening, and the steep rear slope and a small opening, so that a bucket opening structure for guiding oil mist is formed, and the oil mist is enhanced to be transmitted to the center;
in the prior art, a double-sandwich structure without a gap or with a gap smaller than 2cm is formed by the top part (13) of the break angle and the rear plate with a central folding rear bulge, when a main beam is twisted left and right and impacted front and back, the sandwich or double-sandwich structure can generate the sound generated by the friction of the two plate bodies, if the sound is eliminated, the sandwich structure is not needed to be used or the gap is increased, so that the stress differentiation capability of the main beam is reduced, therefore, the noise reduction oil film layer (9) is solidified and shaped on the inner walls of the front plate (4), the rear plate (5) and the lower plate (6), the top part (13) of the break angle connected with the top part of the front plate (4) and the rear plate (5) is overlapped with the top plate overlapping part (7) bent at the top part of the lower plate arranged in a laminated mode, the distance between the top part (13) of the break angle and the top plate overlapping part (7) is not equal to 0 but smaller than 0.2cm, a typical recommendation here is 0.2 mm; thus, the thickness of the inner wall of the noise reduction oil film layer (9) at the top plate superposition position (7) is high, the thickness of the inner wall of the guide horn plate part (8) is low, and the forming method of the noise reduction oil film layer is as follows:
step 1, blending lubricating oil, wherein the lubricating oil is QUIETSCH-EX series, PAO synthetic oil, an antirust agent, an antioxidant and a penetrating agent are added into the lubricating oil, oil seeds in the prior art can be freely matched according to a specific vehicle type, and after the lubricating oil is prepared, the flash point is controlled to be 170-120 ℃ to obtain noise reduction oil formed by an oil film;
and 3, injecting the noise reduction oil obtained in the step 2 into the main beam (1) through the main oil injection holes, wherein 10ml of noise reduction oil is respectively injected into the left and right oil injection holes of the main beam (1) in the injection process, the injection has two modes, 1 is instilled in the direct prior art in each market, and then the self improvement technology is adopted: 20ml of noise reduction oil is injected into the main beam (1) in total; attention is paid to the situation shown in figure 8 during oil injection, an oil gun of an oil injection mechanical arm is an elbow gun, atomization spraying is also carried out during injection, the dispersion can be uniform, the dispersion area is wide, the initially-installed beam body obtained in the step 2 is also downward in the process of dispersion, the dispersion of spraying can be paid attention to during atomization spraying, and the spraying can be directly sprayed under the guide of an oil guide lifting slope (11) to enter the whole break angle top (13) at the same line.
and 5, placing the secondarily assembled vehicle beam into an electrophoresis drying tunnel for baking after the surface electrophoresis line process. Atomizing the noise-reducing oil by using the temperature of the electrophoresis drying tunnel;
Preferably, the left longitudinal beam (2) and the right longitudinal beam (3) are of an expanding type pipe longitudinal beam structure with the same structure, and the whole structure is J-shaped. Is suitable for light vehicles.
Preferably, dog-ear connection points (12) are arranged below front beam bending parts of the left longitudinal beam (2) and the right longitudinal beam (3), and the head end and the tail end of the main beam are spliced and welded by the respective dog-ear connection points (12) of the left longitudinal beam (2) and the right longitudinal beam (3).
Preferably, the oblique oil inlet grooves (14) are formed in the positions, on the oil injection hole, of the left longitudinal beam (2) and the right longitudinal beam (3). The oblique oil inlet grooves (14) have two functions that the oblique oil inlet grooves can be used for connecting the position of the longitudinal beam connecting clamping piece at the top and the position of the longitudinal beam connecting clamping piece at the bottom in oil injection so that the top atomized liquid can be divided and partially sink into the bottom in condensation, and the grooves can also be used for detecting when the spraying mechanical arm sprays to know the inner position for positioning.
Preferably, a spring disc (16) is installed on an inner corner portion (15) formed by assembling the main cross beam (1) with the left longitudinal beam (2) and the right longitudinal beam (3), a disc wing of the spring disc extends forwards to be provided with a sealing blocking piece (17), and the extending position of the sealing blocking piece (17) is matched with the setting position of the oil hole. After the spring disc (16) is installed with the main cross beam (1) and is assembled with the left longitudinal beam (2) and the right longitudinal beam (3) in an auxiliary assembly assembling process, the oil injection hole can be directly opened by one of two options, the other option is welding and sealing by a welding gun, the welding and sealing are not favorable for the quality of the main beam after all, namely, the spring disc (16) which is just provided with a sealing baffle sheet (17) can be completely attached to the bottom of the outer wall of the main cross beam and the bottom of the longitudinal beam from the bottom to completely seal the whole oil injection hole again, and the quality hidden danger of the last point 1 is eliminated.
Preferably, the guide horn plate portion (8) is flared at least 5 degrees. At least the front plate (4) and the rear plate (5) of the guide horn plate part (8) are expanded and pressed outwards to form a horn mouth structure expanded outwards by 5 degrees, and the lower plate can keep the original shape because of the expanded shape.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the appended claims.
Claims (8)
1. A main beam for increasing the overall NVH capacity of a vehicle comprises a main cross beam (1), a left longitudinal beam (2) and a right longitudinal beam (3), wherein the left side of the main cross beam (1) is spliced with the left longitudinal beam (2), and the right side of the main cross beam is spliced with the right longitudinal beam (3); the method is characterized in that: the main beam (1) is formed by integrally stamping or water-swelling and shaping a metal plate body and comprises a front plate (4), a rear plate (5) and a lower plate (6), wherein the tops of the front plate (4) and the rear plate (5) are connected into a folded angle top (13), the front plate and the rear plate are arranged in an inverted V-shaped structure, the bottoms of the front plate and the rear plate are transversely connected with the lower plate (6), the lower plate (6) is upwards extruded and expanded from the bottom in the central axis position to form a trapezoid, arc or reversed character-shaped structure and form 3 parts, the upper plate comprises a central top plate superposition part (7) and guide horn plate parts (8) extending downwards at the head end and the tail end of the top plate superposition part (7), the lower plate (6) is V-shaped or U-shaped in the Y-axis direction, the arc angle of the folded angle top (13) is at least 120 degrees, the folded angle of the bent position of the lower plate, which is respectively connected with the front plate (4) and the rear plate (5) in the Y-axis direction, is at least, the inner walls of the front plate (4), the rear plate (5) and the lower plate (6) are provided with a noise reduction oil film layer (9) in a solidification and shaping mode, the thickness of the inner wall of the noise reduction oil film layer (9) at the top plate superposition position (7) is high, and the thickness of the inner wall of the guide horn plate part (8) is low; the top of the front plate (4) and the top of the rear plate (5) are connected to form a folded angle top (13) which is overlapped with a top plate overlapping part (7) which is arranged below and is bent at the top of the lower plate in a laminated mode, and the distance between the folded angle top (13) and the top plate overlapping part (7) is not equal to 0 but less than 0.2 cm;
an oil filling hole (10) is formed in the axis line position in the X axis of the guide horn plate portion (8), and the oil filling hole (10) is formed in the shape towards the inside of the pipe body and is provided with an oil guide lifting slope (11).
2. The main beam for increasing the overall NVH capability of a vehicle as claimed in claim 1, wherein: the V-shaped automobile main beam opening angle is 120 degrees.
3. The main beam for increasing the overall NVH capability of a vehicle as claimed in claim 1, wherein: the front plate (4) and the rear plate (5) are also outwards formed into a flaring structure above the matched guide horn plate portion (8) to be provided with a tapered transverse plate (18), and the head end of the tapered transverse plate (18) is provided with a longitudinal beam top welding biting piece (19).
4. The main beam for increasing the overall NVH capability of a vehicle as claimed in claim 1, wherein: the left longitudinal beam (2) and the right longitudinal beam (3) are of the same-structure expansion type pipe longitudinal beam structure, and are integrally J-shaped.
5. The main beam for increasing the overall NVH capability of a vehicle as claimed in claim 1, wherein: and the lower parts of the front beam bending parts of the left longitudinal beam (2) and the right longitudinal beam (3) are provided with dog-ear connecting points (12), and the head end and the tail end of the main beam are spliced and welded by the respective dog-ear connecting points (12) of the left longitudinal beam (2) and the right longitudinal beam (3).
6. The main beam for increasing the overall NVH capacity of a vehicle as claimed in claim 4 or claim 5, wherein: and the left longitudinal beam (2) and the right longitudinal beam (3) are provided with oblique oil inlet grooves (14) at the positions of the oil injection holes.
7. The main beam for increasing the overall NVH capability of a vehicle as claimed in claim 1, wherein: sealing blocking pieces (17) are installed at inner corner portions (15) formed by assembling the main cross beam (1) with the left longitudinal beam (2) and the right longitudinal beam (3), the disc wing pieces of the spring disc (16) extend forwards to be provided with the sealing blocking pieces (17), and the extending positions of the sealing blocking pieces (17) are matched with the setting positions of the oil injection holes.
8. The main beam for increasing the overall NVH capability of a vehicle as claimed in claim 1 or claim 3, wherein: the guide horn plate portion (8) expands outward by at least 5 degrees.
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| CN201921472351.7U CN211642345U (en) | 2019-09-05 | 2019-09-05 | Increase girder of whole NVH ability of vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110696919A (en) * | 2019-09-05 | 2020-01-17 | 浙江拓为汽车部件有限公司 | Increase girder of whole NVH ability of vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110696919A (en) * | 2019-09-05 | 2020-01-17 | 浙江拓为汽车部件有限公司 | Increase girder of whole NVH ability of vehicle |
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