CN113602354B - Supporting structure, cavity structure and connecting method thereof - Google Patents

Supporting structure, cavity structure and connecting method thereof Download PDF

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Publication number
CN113602354B
CN113602354B CN202110844129.0A CN202110844129A CN113602354B CN 113602354 B CN113602354 B CN 113602354B CN 202110844129 A CN202110844129 A CN 202110844129A CN 113602354 B CN113602354 B CN 113602354B
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China
Prior art keywords
foaming
cavity
support
plate
foam
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CN202110844129.0A
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Chinese (zh)
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CN113602354A (en
Inventor
吴忠杰
曾晖
周中彪
孔贝贝
苏小明
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Lantu Automobile Technology Co Ltd
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Lantu Automobile Technology Co Ltd
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Priority to CN202110844129.0A priority Critical patent/CN113602354B/en
Publication of CN113602354A publication Critical patent/CN113602354A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/1228—Joining preformed parts by the expanding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/60—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/04—Door pillars ; windshield pillars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The invention relates to the technical field of automobile bodies, in particular to a supporting structure, a cavity structure and a connecting method thereof, wherein the supporting structure comprises: a support frame, a foaming support and a foaming body. The supporting frame comprises a fixed end and a bonding end, and the fixed end is connected with an inner plate; the foaming bracket is used for being arranged on the bonding end and is provided with an accommodating space; the foaming body is arranged in the containing space and can expand and foam under set conditions so as to be bonded with the outer plate. The connection method comprises the following steps: the fixed end inner plate of the fixed support frame; fixing the foaming bracket with the foaming body in the containing space on the bonding end of the support frame; the outer plate and the inner plate are connected, and the cavity structure is heated, so that the foaming body is foamed and connected with the inner plate. The problems that smoke dust is caused by adopting an arc welding process, the environment is not protected and the health is not favorable in the prior art can be solved; the problem that the requirement for the processing precision of the supporting structure and the outer plate is too high by adopting structural adhesive; the rotary tapping riveting process is adopted, so that the cost is too high.

Description

Supporting structure, cavity structure and connecting method thereof
Technical Field
The invention relates to the technical field of automobile bodies, in particular to a supporting structure, a cavity structure and a connecting method of the cavity structure.
Background
The reasonable cavity structure is the basis of a safe and reliable vehicle type. The front longitudinal beam assembly, the rear longitudinal beam assembly, the doorsill assembly, the rear coaming assembly and the ABCD column are all provided with a typical cavity structure, and as shown in figure 1, the typical doorsill cavity structure comprises an inner plate and an outer plate; under the condition of limited cavity size, to meet the performance requirements of collision, installation point rigidity, torsion and the like, cavity supporting plates (names are different according to habits and are also called as reinforcing plates) are developed according to scenes, namely, a supporting structure is arranged between an inner plate and an outer plate, and a structure of a supporting plate in a shape of a Chinese character 'ji' is arranged in the middle of a lower drawing.
Because the fagging position is inside the position cavity, the bottom surface and side can be fixed through the spot welding, always has one side and can't fix by spot welding because of the enclosed construction of cavity, and the scheme of often adopting has to increase arc-welding or increases the structure and glues.
However, the arc welding process requires the feasibility of the field device layout to be considered in advance; the arc welding process takes electric arc as a heat source, converts electric energy into heat energy required by welding by utilizing the physical phenomenon of air discharge, melts the welded parts, and solidifies the parts together after cooling, thereby achieving the purpose of connecting metals. The arc welding process belongs to a high energy consumption process, causes smoke dust due to high temperature on site, is not environment-friendly and is not good for health. Another difficulty with arc welding is corrosion protection, high temperatures can damage the arc welding perimeter coating, and arc welding causes fine slag to adhere around the arc, which increases the risk of corrosion.
The supporting structure and the outer plate can be connected in a rotary tapping riveting mode, the plate is subjected to a fixing process of tapping riveting after thermal deformation through high-speed rotation, and equipment investment is high.
The structural connection function can be well exerted only by adopting the structural adhesive with the actual gap (0-1) mm, the longer the adhesive coating length is, the better the adhesive coating length is, the higher the requirement on the manufacturing is put forward, and the gap must be strictly controlled within 1 mm.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a supporting structure, a cavity structure and a connecting method thereof, which can solve the problems that smoke dust is caused, the environment is not protected and the health is not good due to the fact that the supporting structure and an outer plate are welded by an arc welding process in the prior art; the structural adhesive is adopted to bond the supporting structure and the outer plate, so that the requirement on the processing precision of the supporting structure and the outer plate is too high; the rotary tapping riveting process is adopted, so that the cost is too high.
In order to achieve the purpose, the invention adopts the technical scheme that:
in one aspect the present invention provides a support structure comprising:
the supporting frame comprises a fixed end and a bonding end, and the fixed end is connected with an inner plate forming a cavity;
the foaming bracket is used for being installed on the bonding end and is provided with an accommodating space;
and the foaming body is arranged in the accommodating space and can expand and foam under a set condition so as to be bonded with the outer plate forming the cavity.
In some optional schemes, the bonding end is provided with at least one clamping hole, and the foaming bracket comprises a clamping foot corresponding to the clamping hole and used for matching with the clamping hole to clamp the foaming bracket to the bonding end.
In some optional schemes, the foaming bracket further comprises a frame body, the frame body forms a hollow accommodating space for accommodating the foaming body and limiting the foaming direction of the foaming body, and the clamping foot is arranged on one side of the frame body.
In some alternatives, the frame has a thickness of 3-6 mm.
In some optional schemes, the support frame further comprises a side plate used for being connected with the side wall of the cavity.
In some alternatives, the foam is an intumescent resin having a volume expansion ratio of 150-300%.
In another aspect, the present invention further provides a cavity structure, including:
an inner plate;
the outer plate is connected with the inner plate, and a cavity is formed between the outer plate and the inner plate;
at least one support structure, support structure locates in the cavity, each support structure all includes:
-a support frame comprising a fixed end and an adhesive end, the fixed end being intended to be connected to an inner plate forming a cavity;
-a foam holder for mounting on the adhesive end, the foam holder being provided with an accommodation space;
-a foam body provided in the receiving space and expandable to foam under set conditions to bond with the outer panel forming the cavity.
In some optional solutions, the inner plate is in a shape of a Chinese character 'ji', and a groove is arranged inside the inner plate.
In still another aspect, the present invention further provides a method for connecting cavity structures, including the following steps:
fixing the fixed end of the support frame to the inner plate forming the cavity;
fixing the foaming bracket with the foaming body in the containing space on the bonding end of the support frame;
the outer plate is connected with the inner plate, and the cavity structure is heated to enable the foaming body to be foamed and connected with the outer plate.
In some optional embodiments, the heating the cavity structure to foam the foam body and connect the foam body with the outer panel specifically includes: and baking the cavity structure at the temperature of 120-180 ℃ for 15-30 minutes to foam the foaming body so as to connect the bonding end with the outer plate.
Compared with the prior art, the invention has the advantages that: the supporting structure arranged in the cavity structure is connected with the outer plate through foaming after the foaming body arranged on the foaming bracket is heated and then foams. Because the expansion volume of the foaming body is larger, the requirement on the gap in the cavity is lower after the inner plate and the outer plate are connected through the outer side, and the problems that when the outer plate and the inner plate are connected in the cavity by the supporting structure, one end of the supporting structure is connected with the inner plate, the other end of the supporting structure is connected with the outer plate, the supporting structure cannot be bonded due to the larger gap, and the field arrangement is difficult due to the fact that bonding glue is smeared can be avoided. Meanwhile, the problems that after the outer plate and the inner plate are connected through the outer side, the supporting structure and the outer plate are welded, holes need to be formed in the outer plate, operation is difficult, efficiency is low, and smoke dust can be generated are solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic illustration of a prior art connection of a support structure and a cavity structure in an embodiment of the present invention;
FIG. 2 is a schematic diagram of a split three-dimensional structure of a support structure and a cavity structure in an embodiment of the invention;
FIG. 3 is a schematic view of the support structure mounted to the inner panel in an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a support frame according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a foam scaffold in an embodiment of the invention.
In the figure: 1. a support frame; 11. a fixed end; 12. a bonding end; 13. a side plate; 2. an inner plate; 14. a support plate; 15. a connecting frame; 3. foaming the stent; 31. clamping a pin; 32. a frame body; 4. an outer plate; 5. a foam.
Detailed Description
In order to make the objects, 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 drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 2, 4 and 5, the present invention provides a support structure comprising: a support frame 1, a foaming support 3 and a foaming body 5.
The support frame 1 comprises a fixed end 11 and a bonding end 12, wherein the fixed end 11 is used for being connected with an inner plate 2 forming a cavity; the foaming bracket 3 is used for being arranged on the bonding end 12, and the foaming bracket 3 is provided with an accommodating space; the foam 5 is provided in the accommodation space and can expand and foam under a set condition to be bonded to the outer panel 4 forming the cavity.
When the supporting structure is used, the fixed end 11 of the supporting frame 1 is connected with the inner plate 2 forming the cavity; fixing the foaming bracket 3 with the foaming body 5 in the containing space on the bonding end 12 of the support frame 1; finally, the outer plate 4 and the inner plate 2 are connected, and the cavity structure is heated to foam the foam body 5 and connect the outer plate 4. The supporting structure can improve the transverse supporting strength of the cavity structure, can be connected with the outer plate 4 through the outer side at the inner plate 2 and the outer plate 4, and can be foamed after being heated through the foaming body 5 arranged on the foaming bracket 3, and the supporting structure arranged in the cavity structure is connected with the outer plate 4. Because the expansion volume of the foaming body 5 is large, the requirement on the gap in the cavity after the inner plate 2 and the outer plate 4 are connected through the outer side is low, and the problems that when the outer plate 4 and the inner plate 2 are connected in the cavity by the supporting structure, one end of the supporting structure is connected with the inner plate 2, the other end of the supporting structure is connected with the outer plate 4, the gap is large, bonding cannot be achieved, and bonding glue is smeared to cause difficulty in field arrangement can be avoided. Meanwhile, as shown in fig. 1, the problems that after the outer plate 4 and the inner plate 2 are connected through the outer side, holes need to be formed in the outer plate 4 when the supporting structure and the outer plate 4 are welded, the operation is difficult, the efficiency is low, and smoke is generated can also be avoided. According to the scheme, the outer plate 4 and the inner plate 2 can be connected through the foaming body 5 after being connected, so that the problem of difficult field arrangement is solved and the investment of field equipment is reduced on the premise of achieving structural connection; the scheme is environment-friendly, does not generate harmful smoke dust and has no energy consumption; for the field, the method has no strict requirements on the field process, is easy to realize by operators, and has controllable and reliable follow-up quality.
As shown in fig. 1 to 3, in this embodiment, the cavity structure can be provided with a support structure to improve the strength of the cavity structure. The inner plate 2 is a supporting plate provided with grooves, and is designed to be in a groove shape to improve the strength of the inner plate, for example, a front longitudinal beam assembly, a rear longitudinal beam assembly, a threshold assembly, a rear coaming assembly and an ABCD column all have typical cavity structures, the outer plate 4 is a plate which is matched with the inner plate and is provided with a closed cavity, and the outer plate can be in a groove-shaped supporting plate structure or a flat plate structure according to design requirements.
Referring to fig. 4 and 5 again, the supporting frame 1 further includes a supporting plate 14, the fixed end 11 and the bonding end 12 are respectively located at two ends of the supporting plate 14, both the fixed end 11 and the bonding end 12 are connecting plates, and the connecting plates are perpendicular to the supporting plate 14 or the inclination angles of the inner plate 2 and the outer plate 4 are designed.
In some alternative embodiments, the bonding end 12 is provided with at least one locking hole, and the foam holder 3 includes a locking leg 31 corresponding to the locking hole for cooperating with the locking hole to lock the foam holder 3 to the bonding end 12.
In this embodiment, the bonding end 12 is a connecting plate, a fastening hole is formed on the connecting plate, and the foam holder 3 includes a fastening pin 31 corresponding to the fastening hole. When in use, after the fixed end of the support frame 1 is connected with the inner plate 2, the foaming bracket 3 is clamped in the clamping hole of the bonding end 12 through the clamping foot 31. Such a design allows the foam holder 3 and the support frame 1 to be stored and transported separately before the support structure is mounted inside the cavity structure, saving space for transporting and storing the foam holder 3 and the support frame 1. Because the foam 5 is filled in the foam holder 3, if the foam and the entire support frame 1 are made into a whole, the entire support structure needs to be specially packaged, transported and stored, which results in occupation and waste of transportation and storage space. When the foam 5 is filled in the foam holder 3, if the foam holder 3 and the support frame 1 are integrated, a larger support and fixing device is required, and the space is also occupied. In the scheme, the foaming support 3 and the support frame 1 are directly made into a buckle type connection mode, so that the foaming support 3 and the support frame 1 can be separately transported and stored during transportation and storage, and the transportation and storage space can be saved; in addition, the structure of the foaming bracket 3 is smaller, so that the foaming bracket is more convenient to fill the foaming body 5.
In this example, the foam holder 3 is made of nylon material. The clamping hole arranged at the bonding end 12 is circular, the preset diameter is about 6mm, and the diameter of the clamping hole is determined according to the size of the foaming support 3 to be connected. In this example, the bonding end 12 is provided with two clamping holes arranged at intervals, the diameters of the clamping holes are respectively 6mm and 8mm, the mistaken installation can be prevented, and the corresponding foaming bracket 3 is provided with two clamping feet 31 corresponding to the clamping holes; in addition, the clamping pin structure is suitable for the thickness of a steel plate with the thickness of 0.6-2 mm; of course, in other embodiments, the clamping legs may be provided in other forms, or the foaming rack 3 and the supporting rack 1 may be connected in other forms capable of being clamped quickly.
In some optional embodiments, the foaming bracket 3 further includes a frame 32, the frame 32 forms a hollow accommodating space for accommodating the foaming body 5 and limiting the foaming direction of the foaming body 5, and the clamping pin 31 is disposed on one side of the frame 32.
In this embodiment, the clamping leg 31 is conical and connected to the frame 32 through the connecting piece, the projection of the foam holder 3 in the clamping direction is that the clamping leg 31 is located within the range of the frame 32, and a gap is left between the clamping leg 31 and the frame 32, that is, a gap of the clamping bonding end 12, in this example, the bonding end 12 is a connecting plate, so that the gap between the clamping leg 31 and the frame 32 is smaller than or equal to the thickness of the connecting plate, so that the foam holder 3 is tightly connected to the supporting frame 1.
The conical engaging leg 31 has a diameter gradually smaller toward a direction away from the frame 32 so as to be conveniently engaged in the engaging hole. Moreover, the clamping leg 31 near one side of the frame 32 is fluffy and has a certain contractibility, and can be compressed in the process of passing through the clamping hole, and can be unfolded and clamped on the bonding end 12 after passing through the clamping hole, so that the whole foaming bracket 3 is fixed on the bonding end 12.
In addition, in order to facilitate the film drawing of the injection-molded foam bracket 3, the connecting sheet is in the same direction with the wall surface of the frame body 32, and the design can ensure that the mold of the injection-molded foam bracket 3 has no back-off, so that the design of the mold is convenient; a gap is arranged in the middle of the fluffy clamping leg 31, so that the fluffy clamping leg 31 has certain contractibility and can pass through the clamping hole; the gap between the clamping pins 31 is also in the same direction as the connecting sheet and the wall surface of the frame body 32, so that the film can be conveniently pulled out. The top end of the conical clamping pin 31 is arc-shaped, and is inserted into the clamping hole in the direction to be matched with the clamping hole.
The frame 32 forms a hollow accommodating space for accommodating the foam 5 and for restricting the foaming direction of the foam 5, and is designed to expand the foam 5 to both sides when it is expanded, thereby connecting the bonding ends 12 on both sides to the outer panel 4. In the subsequent use process, the force is transferred between the support frame 1 and the outer plate 4 through the foaming body 5, the clamping pin 31 is not accepted at this time, the clamping pin 31 only plays a role in supporting the foaming support 3 and the bonding end 12 to be fixed together, and the subsequent whole cavity structure is not subjected to force basically in the use process, so that the foaming support 3 can be made of a nylon frame material with reduced strength, the manufacturing is convenient, and the production cost is saved.
In this example, the foam holder 3 and the foam body 5 are integrally engaged with each other in the holder 1 during use. The foaming bracket 3 and the foaming body 5 are formed by two-color injection molding or secondary injection molding process and are composed of two materials of a nylon framework and a foaming body. The foam holder 3 is injection molded first, and then the foam 5 is injection molded into the foam holder 3.
In some alternative embodiments, the frame 32 has a thickness of 3-6 mm.
In the present embodiment, the thickness of the frame 32 refers to the length of the foam 5 in the foaming direction. The frame 32 is filled with the foam 5, and the foaming rate of the foam 5 is generally recommended to be 150-; the thickness of the frame 32, i.e., the thickness of the foam 5, is determined by the foaming ratio of the foam 5 and the error of the gap distance between the inner panel 2 and the outer panel 4, when the error of the gap distance between the inner plate 2 and the outer plate 4 is large, a thick frame 32 design and a large foaming ratio can be adopted to connect the inner plate 2 and the outer plate 4, when the support frame 1 and the frame body 32 are designed, the sum of the length of the support frame 1 and the thickness of the frame body 32 can be designed to be the minimum value of the gap distance of the cavity between the inner plate 2 and the outer plate 4 after error is considered, the outer plate 4 can be ensured to be covered on the inner plate 2, the situation that the outer plate 4 cannot be covered on the inner plate 2 after the support frame 1 is connected with the frame body 32 is avoided, and the thicker frame body 32 needs to be designed at the moment, to accommodate the thicker foam 5, so that the bonding end 12 of the stand 1 and the outer panel 4 can be connected together after the foam 5 is foamed.
In some alternative embodiments, the support 1 further comprises side panels 13 for connection with the side walls of the cavity.
In this embodiment, one or two blocks of curb plates 13 of support frame 1, the curb plate sets up the both sides at backup pad 14, stiff end 11 and bonding end 12 are located the both ends of backup pad 14 respectively, when erection bracing frame 1, earlier set up support frame 1 in the recess of inner panel 2, stiff end 11 is in the same place with the bottom welding of recess, curb plate 13 adopts the welded form to be connected with the lateral wall of recess equally, set up curb plate 13 and can strengthen the joint strength of support frame 1 and inner panel 2, avoid long-time use, support frame 1 takes place to drop with inner panel 2.
In some alternative embodiments, the foam 5 is an intumescent epoxy resin with a volume expansion ratio of 150-.
In the embodiment, the adopted foaming type epoxy resin is baked for 15-30 minutes under the condition that the temperature is 120-180 ℃, the bonding end 12 and the outer plate 4 can be bonded together in a foaming way, the shear strength of the material of the foaming body 5 is 3-10MPa, and the requirement of the connection strength of the bonding end 12 and the outer plate 4 is completely met. Under the test conditions of 1.5mm thick steel plate, 3mm thick foam thickness, 25mm overlap, and a tensile rate of 50mm/min, the shear strength of the outer plate 4 is 3-10Mpa, and in other embodiments, if the cavity space in the cavity structure is sufficiently large, the bonding end 12 having a larger area may be used, that is, the foam 5 having a larger overlap may be used, and the shear strength of the foam 5 may be made larger. The T-peel strength of the foam material is greater than 10N/mm (the results are very different depending on the test method).
Referring again to fig. 2 to 5, in another aspect, the present invention also provides a cavity structure, including: an inner panel 2, an outer panel 4 and at least one support structure.
The outer plate 4 is connected with the inner plate 2, and a cavity is formed between the outer plate and the inner plate 2;
each support structure comprises: a support frame 1, a foaming bracket 3 and a foaming body 5.
The support frame 1 comprises a fixed end 11 and a bonding end 12, wherein the fixed end 11 is used for being connected with an inner plate 2 forming a cavity; the foaming bracket 3 is used for being arranged on the bonding end 12, and the foaming bracket 3 is provided with an accommodating space; the foam body 5 is provided in the accommodation space and can expand and foam under a set condition to be bonded to the outer panel 4 forming the cavity.
When the cavity structure is used, the fixed end 11 of the support frame 1 is connected with the inner plate 2 forming the cavity; then fixing the foaming bracket 3 with the foaming body 5 in the containing space on the bonding end 12 of the support frame 1; finally, the outer plate 4 and the inner plate 2 are connected, and the cavity structure is heated to foam the foam body 5 and connect the outer plate 4. The supporting structure can improve the transverse supporting strength of the cavity structure, can be used for heating and foaming through the foaming body 5 arranged on the foaming bracket 3 after the inner plate 2 and the outer plate 4 are connected through the outer side, and is connected with the outer plate 4 by the supporting structure arranged in the cavity structure. Because the expansion volume of foaming body 5 is great, and the clearance requirement in the cavity is lower after connecting through the outside to inner panel 2 and planking 4, can avoid bearing structure when planking 4 and inner panel 2 in the cavity, one end is connected with inner panel 2, and the other end is connected with planking 4, because the clearance is great, can't bond to and scribble on the support frame and scribble the problem that bonding glue can lead to the field layout difficulty.
Meanwhile, the problems that after the outer plate 4 and the inner plate 2 are connected through the outer side, the supporting structure and the outer plate 4 are welded to form holes in the outer plate 4, operation is difficult, efficiency is low, and smoke dust can be generated can be solved.
According to the scheme, the outer plate 4 and the inner plate 2 can be connected through the foaming body 5 after being connected, so that the problem of difficulty in field arrangement is solved and the investment of field equipment is reduced on the premise of structural connection; the scheme is environment-friendly, does not generate harmful smoke dust and has no energy consumption; for the field, the method has no strict requirements on the field process, is easy to realize by operators, and has controllable and reliable follow-up quality.
In this embodiment, the number of the supporting structures in the cavity formed by the inner plate 2 and the outer plate 4 is designed according to the length and strength requirements of the cavity formed by the inner plate 2 and the outer plate 4, so that a plurality of supporting structures are arranged in the cavity formed by the inner plate 2 and the outer plate 4, and the strength of the cavity formed by the inner plate 2 and the outer plate 4 is enhanced.
In some other embodiments, the two support structures are further connected by a connecting frame 15, the connecting frame 15 is also a plate-shaped structure, and the connecting frame 15 is further welded with the groove side wall of the inner plate 2, so that the connecting strength of the support structures and the inner plate 2 can be improved. When the length between the connection frame 15 or the support plate 14 exceeds a certain length, the connection frame 15 and the support plate 14 may be designed to be hollow on the premise that the connection frame 15 and the support plate 14 satisfy strength.
The cavity structure can be provided with a support structure, so that the strength of the cavity structure can be improved. The inner plate 2 is a supporting plate provided with grooves, and is designed to be in a groove shape to improve the strength of the inner plate, for example, a front longitudinal beam assembly, a rear longitudinal beam assembly, a threshold assembly, a rear coaming assembly and an ABCD column all have typical cavity structures, the outer plate 4 is a plate which is matched with the inner plate and is provided with a closed cavity, and the outer plate can be in a groove-shaped supporting plate structure or a flat plate structure according to design requirements.
In some other embodiments, the inner plate 2 is in the shape of a "little" with a groove inside.
In the present embodiment, the outer edge portion of the inner plate 2 in the shape of a Chinese character 'ji' can be connected with the outer plate 4 by welding. Inside is equipped with the recess, is equivalent to the form of channel-section steel, can improve the intensity of self, and in addition, inner panel 2 and planking 4 can form the cavity after connecting through the welded form, set up bearing structure in the cavity, can improve whole cavity structure's intensity.
The invention also provides a connecting method of the cavity structure, which comprises the following steps:
s1: the fixed end 11 of the support frame 1 is fixed to the inner plate 2 forming the cavity.
In this embodiment, when installing support frame 1, set up support frame 1 in the recess of inner panel 2 earlier, stiff end 11 is in the same place with the bottom welding of recess, and curb plate 13 adopts the welded form with the lateral wall of recess to be connected equally, sets up curb plate 13 and can strengthen the joint strength of support frame 1 and inner panel 2, avoids long-time use, and support frame 1 takes place to drop with inner panel 2.
S2: the foaming bracket 3 with the foaming body 5 in the containing space is fixed on the bonding end 12 of the support frame 1.
In this embodiment, the bonding end 12 is a connecting plate, a fastening hole is formed on the connecting plate, and the foam holder 3 includes a fastening pin 31 corresponding to the fastening hole. When in use, after the fixed end of the support frame 1 is connected with the inner plate 2, the foaming bracket 3 is clamped in the clamping hole of the bonding end 12 through the clamping foot 31. Such a design can store and transport the foam holder 3 and the support frame 1 separately before installing the support structure inside the cavity structure, saving the space for transporting and storing the foam holder 3 and the support frame 1. Because the foaming bracket 3 is filled with the foaming body 5, if the foaming body and the whole supporting frame 1 are integrated, the whole supporting structure needs to be specially packaged, transported and stored, which results in occupying and wasting transportation and storage space. When the foam 5 is filled in the foam holder 3, if the foam holder 3 and the support frame 1 are integrated, a larger support and fixing device is required, and the space is also occupied. In the scheme, the foaming support 3 and the support frame 1 are directly made into a buckle type connection mode, so that the foaming support 3 and the support frame 1 can be separately transported and stored during transportation and storage, and the transportation and storage space can be saved; in addition, the structure of the foaming bracket 3 is smaller, so that the foaming bracket is more convenient to fill the foaming body 5.
The clamping pin 31 is conical and connected with the frame body 32 through the connecting sheet, the projection of the foaming bracket 3 in the clamping direction is that the clamping pin 31 is positioned in the range of the frame body 32, and a gap is left between the clamping pin 31 and the frame body 32, namely the gap of the clamping bonding end 12, in this example, the bonding end 12 is a connecting plate, so the gap between the clamping pin 31 and the frame body 32 is smaller than or equal to the thickness of the connecting plate, so that the foaming bracket 3 is tightly connected with the support frame 1.
The conical engaging leg 31 has a diameter gradually smaller toward a direction away from the frame 32 so as to be conveniently engaged in the engaging hole. Moreover, the clamping leg 31 near one side of the frame 32 is fluffy and has a certain contractibility, and can be compressed in the process of passing through the clamping hole, and can be unfolded and clamped on the bonding end 12 after passing through the clamping hole, so that the whole foaming bracket 3 is fixed on the bonding end 12.
In order to facilitate the film drawing of the injection molding foaming support 3, the connecting sheet is in the same direction with the wall surface of the frame body 32, and the design can ensure that the mold of the injection molding foaming support 3 has no inverted buckle and is convenient for the design of the mold; a gap is arranged in the middle of the fluffy clamping foot 31, so that the fluffy clamping foot 31 has certain contractility and can pass through the clamping hole; the gap between the clamping pins 31 is in the same direction as the connecting sheet and the wall surface of the frame body 32, so that the film can be conveniently pulled out. The top end of the conical clamping pin 31 is arc-shaped, and is inserted into the clamping hole in the direction to be matched with the clamping hole.
The frame 32 forms a hollow accommodating space for accommodating the foam 5 and for restricting the foaming direction of the foam 5, and is designed to expand the foam 5 to both sides when it is expanded, thereby connecting the bonding ends 12 on both sides to the outer panel 4. In the subsequent use process, the force is transferred between the support frame 1 and the outer plate 4 through the foaming body 5, the clamping pin 31 is not accepted at this time, the clamping pin 31 only plays a role in supporting the foaming support 3 and the bonding end 12 to be fixed together, and the subsequent whole cavity structure is not subjected to force basically in the use process, so that the foaming support 3 can be made of a nylon frame material with reduced strength, the manufacturing is convenient, and the production cost is saved.
S3: the outer panel 4 is connected to the inner panel 2, and the cavity structure is heated to foam the foam 5 and connect the outer panel 4.
In some alternative embodiments, the cavity structure is baked at a temperature of 120-180 ℃ for 15-30 minutes to foam the foam to connect the bonded ends to the outer panel.
In this embodiment, the front side member assembly, the rear side member assembly, the rocker assembly, the back panel assembly and the ABCD pillar all have typical cavity structures, and all need to be baked in a coating workshop of a main engine plant, when the foam body 5 is baked in the coating workshop of the main engine plant, the foam body is foamed to both sides and bonded to the metal plates on both sides under the guidance/control of the frame body 32, and when the temperature is returned to a room temperature state, the foam body 9 is cooled and solidified, so that the structural connection between the bonding end 12 and the outer panel 4 is realized.
In summary, the following steps: when the supporting structure, the cavity structure and the connecting method thereof are used, the supporting structure is arranged in the cavity structure, the supporting structure can improve the transverse supporting strength of the cavity structure, the supporting structure can be heated and foamed through the foaming body 5 arranged on the foaming bracket 3 after the inner plate 2 and the outer plate 4 are connected through the outer sides, and the supporting structure arranged in the cavity structure is connected with the outer plate 4. Because the expansion volume of foaming body 5 is great, and the clearance requirement in the cavity is lower after connecting through the outside to inner panel 2 and planking 4, can avoid bearing structure when planking 4 and inner panel 2 in the cavity, one end is connected with inner panel 2, and the other end is connected with planking 4, because the clearance is great, can't bond to and scribble on the support frame and scribble the problem that bonding glue can lead to the field layout difficulty. The method can solve the problems that in the prior art, the arc welding process is adopted to weld the supporting structure and the outer plate, smoke dust is caused, the method is not environment-friendly and is not beneficial to health; structural adhesive is adopted to bond the supporting structure and the outer plate, so that the requirement on the processing precision of the supporting structure and the outer plate is high; the rotary tapping riveting process is adopted, so that the cost is too high.
In addition, the foaming support 3 and the support frame 1 are connected in a clamping mode, the foaming support 3 and the support frame 1 can be separately stored and transported before the support structure is installed in the cavity structure, and the transportation and storage space of the foaming support 3 and the support frame 1 is saved. Because the foam 5 is filled in the foam holder 3, if the foam and the entire support frame 1 are made into a whole, the entire support structure needs to be specially packaged, transported and stored, which results in occupation and waste of transportation and storage space. When the foam 5 is filled in the foam holder 3, if the foam holder 3 and the support frame 1 are integrated, a larger support and fixing device is required, and the space is also occupied. In the scheme, the foaming support 3 and the support frame 1 are directly made into a buckle type connection mode, so that the foaming support 3 and the support frame 1 can be separately transported and stored during transportation and storage, and the transportation and storage space can be saved; in addition, the structure of the foaming bracket 3 is smaller, so that the foaming bracket is more convenient to fill the foaming body 5.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. A support structure, comprising:
the supporting frame (1) comprises a fixed end (11) and a bonding end (12), wherein the fixed end (11) is connected with an inner plate (2) forming a cavity, the inner plate (2) is shaped like a Chinese character 'ji', a groove is formed in the inner part of the inner plate, and the supporting frame (1) further comprises a side plate (13) which is connected with the side wall of the cavity;
the foaming support (3) is used for being installed on the bonding end (12), and the foaming support (3) is provided with an accommodating space and is a nylon material part;
a foam body (5) which is provided in the accommodation space and can be expanded and foamed under a set condition so as to be bonded to an outer panel (4) forming a cavity;
the bonding end (12) is a connecting plate and is provided with at least one clamping hole, and the foaming support (3) comprises a clamping pin (31) corresponding to the clamping hole and used for matching with the clamping hole to clamp the foaming support (3) to the bonding end (12);
the foaming support (3) further comprises a frame body (32), the frame body (32) forms a hollow accommodating space for accommodating the foaming body (5) and limiting the foaming direction of the foaming body (5), and the clamping foot (31) is arranged on one side of the frame body (32);
card foot (31) are the taper shape, through the connection piece with framework (32) are connected, the wall syntropy of connection piece and framework (32), and conical card foot (31) are towards keeping away from the direction diameter of framework (32) diminishes gradually, is close to framework (32) one side card foot (31) are fluffy form, have certain contractility, and at the in-process that passes the card hole, can be compressed, can expand the card after passing the card hole and hold in bond end (12) is last, the clearance between card foot (31) and framework (32) is less than or equal to the thickness of connecting plate, is equipped with the clearance in the middle of fluffy card foot (31), the clearance that sets up in the middle of card foot (31) also with the wall syntropy of connection piece and framework (32).
2. The support structure of claim 1, wherein the frame (32) has a thickness of 3-6 mm.
3. The support structure of claim 1, wherein the foam (5) is an intumescent resin having a volume expansion ratio of 150-300%.
4. A cavity structure, comprising:
the inner plate (2) is in a shape like a Chinese character 'ji', and a groove is formed in the inner plate (2);
an outer plate (4) which is connected to the inner plate (2) and forms a cavity with the inner plate (2);
at least one support structure, support structure locates in the cavity, each support structure all includes:
-a support frame (1) comprising a fixed end (11) and an adhesive end (12), said fixed end (11) being intended to be connected to an inner panel (2) forming a cavity, said support frame (1) further comprising a side panel (13) intended to be connected to a side wall of said cavity;
-a foam holder (3) for mounting on said adhesive end (12), said foam holder (3) being provided with a housing space, being a piece of nylon material;
-a foam body (5) provided in the receiving space and expandable to foam under set conditions for bonding with the outer panel (4) forming the cavity;
the bonding end (12) is a connecting plate and is provided with at least one clamping hole, and the foaming support (3) comprises a clamping pin (31) corresponding to the clamping hole and used for matching with the clamping hole to clamp the foaming support (3) to the bonding end (12);
the foaming support (3) further comprises a frame body (32), the frame body (32) forms a hollow accommodating space for accommodating the foaming body (5) and limiting the foaming direction of the foaming body (5), and the clamping foot (31) is arranged on one side of the frame body (32);
card foot (31) are the taper shape, through the connection piece with framework (32) are connected, the wall syntropy of connection piece and framework (32), and conical card foot (31) are towards keeping away from the direction diameter of framework (32) diminishes gradually, is close to framework (32) one side card foot (31) are fluffy form, have certain contractility, and at the in-process that passes the card hole, can be compressed, can expand the card after passing the card hole and hold in bond end (12) is last, the clearance between card foot (31) and framework (32) is less than or equal to the thickness of connecting plate, is equipped with the clearance in the middle of fluffy card foot (31), the clearance that sets up in the middle of card foot (31) also with the wall syntropy of connection piece and framework (32).
5. A method of connecting cavity structures, using the support structure of claim 1, comprising the steps of:
fixing a fixed end (11) of the support frame (1) to an inner plate (2) forming a cavity;
fixing a foaming bracket (3) which is provided with a foaming body (5) in the containing space on a bonding end (12) of the support frame (1);
the outer plate (4) is connected with the inner plate (2), and the cavity structure is heated, so that the foaming body (5) is foamed and connected with the outer plate (4).
6. The method for connecting a cavity structure according to claim 5, wherein the heating of the cavity structure to connect the foam body (5) with the foam outer panel (4) comprises: baking the cavity structure at the temperature of 120-180 ℃ for 15-30 minutes to foam the foaming body (5) and connect the bonding end (12) with the outer plate (4).
CN202110844129.0A 2021-07-26 2021-07-26 Supporting structure, cavity structure and connecting method thereof Active CN113602354B (en)

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JP4040319B2 (en) * 2002-02-05 2008-01-30 共和産業株式会社 Reinforcing structure and reinforcing method for hollow structure
CN102328625B (en) * 2011-06-03 2013-01-16 浙江吉利汽车研究院有限公司 Vehicle cavity separation member and application method thereof
CN203902436U (en) * 2014-05-16 2014-10-29 北京汽车股份有限公司 Cavity acoustic structure for use at front end of pillar A and automobile
CN206012724U (en) * 2016-08-31 2017-03-15 重庆长安汽车股份有限公司 The car body right vertical beam of the first denoising device, the second denoising device and energy noise reduction
CN206086898U (en) * 2016-10-28 2017-04-12 长城汽车股份有限公司 Bearing structure and vehicle in bight before support group spare and side wall planking
CN207902580U (en) * 2018-01-18 2018-09-25 北京汽车股份有限公司 A kind of threshold reinforcer and the vehicle with it
CN210101770U (en) * 2019-04-30 2020-02-21 天津艾康尼克新能源汽车有限公司 A connection structure and car that is used for top cap and side wall of car

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