CN107140030B - Connecting structure and method for body and chassis of semi-load type passenger car - Google Patents
Connecting structure and method for body and chassis of semi-load type passenger car Download PDFInfo
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- CN107140030B CN107140030B CN201710409269.9A CN201710409269A CN107140030B CN 107140030 B CN107140030 B CN 107140030B CN 201710409269 A CN201710409269 A CN 201710409269A CN 107140030 B CN107140030 B CN 107140030B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D24/00—Connections between vehicle body and vehicle frame
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Abstract
The invention discloses a connecting structure of a body and a chassis of a semi-load-bearing type passenger car, which comprises a body floor framework and a chassis frame, wherein an upper cover plate is welded on the upper surface of a cross beam of the body floor framework to form a closed cavity; a fixing hole is formed in the lower surface of the cross beam, and a reinforcing plate and a nut limiting bracket are welded above the fixing hole of the cross beam of the vehicle body floor; fixed supports are welded on the outer sides of the crossbeams on the two sides of the chassis frame, and fixed holes are formed in the fixed supports; and the floor beam of the vehicle body is fixed with a fixed support on the chassis frame through bolts. The invention also discloses a method for connecting the body and the chassis of the semi-load type passenger car. The invention is installed by buckling the floor beam of the vehicle body and the fixed support on the chassis frame, has the characteristics of accurate buckling connection and positioning, obviously improved production efficiency, uniform connection stress and ensured connection strength, and also prolongs the service life of the vehicle.
Description
Technical Field
The invention belongs to the technical field of passenger car assembly, and particularly relates to a connecting structure and a connecting method for a body and a chassis of a semi-load type passenger car.
Background
At present, the manufacturing process of a passenger car with a semi-bearing type car body structure usually adopts a buckling mode, namely, a car body and a chassis of the passenger car are manufactured respectively, then a coated car body assembly is connected with the chassis assembly, and finally, components such as internal and external decorations, electric appliances and the like are assembled. The buckling mode can be used for vehicle body production under the condition of no chassis, facilitates advanced processes of vehicle body welding, electrophoresis, spraying and the like, is high in production efficiency, and is suitable for large-scale production. The most key and most core technology of the production mode of buckling the vehicle body and the chassis is a method for buckling and connecting the vehicle body and the chassis, and the strength and the service cycle of the whole vehicle are directly influenced by the quality of the connecting method.
At present, passenger cars with domestic half-load type car body structures all use welding structures and welding process connection methods, and the methods have the following defects: 1. when in positioning, an operator needs to continuously move and adjust the position of the body, measure the relative size of the body and the chassis frame until the relative size is completely consistent with the theoretical size, and weld a connecting piece; 2. when the connecting piece is respectively welded with the vehicle body and the chassis frame, the welding point is not sufficiently firm due to inconvenient operation, and stress is not uniform, so that the stress concentration phenomenon is easily generated, the frame and the vehicle body are cracked, and great potential safety hazards exist; 3. when the electrophoresis-coated vehicle body and chassis frame are connected, the connecting piece is welded with the vehicle body and chassis frame for the second time, so that the electrophoresis layer and paint surface of the parts of the vehicle body and chassis at the joint are damaged, and the meaning of electrophoresis corrosion prevention is lost; 4. because the anticorrosion process at the joint is damaged, the remedial anticorrosion measures at the later stage are difficult to treat in place, and after the vehicle runs for a period of time, the connecting part can be rusted, so that the connecting strength is influenced.
Disclosure of Invention
Aiming at the defects, the invention provides a connecting structure of a body and a chassis of a semi-load passenger car and a connecting method thereof.
The purpose of the invention can be realized by the following technical scheme:
a connecting structure of a body and a chassis of a semi-load-bearing type passenger car comprises a body floor framework and a chassis frame, wherein an upper cover plate is welded on the upper surface of a cross beam of the body floor framework to form a closed cavity; a fixing hole is formed in the lower surface of the cross beam, and a reinforcing plate and a nut limiting bracket are welded above the fixing hole of the cross beam of the vehicle body floor; fixed supports are welded on the outer sides of the crossbeams on the two sides of the chassis frame, and fixed holes are formed in the fixed supports; and the floor beam of the vehicle body is fixed with a fixed support on the chassis frame through bolts.
A cross beam in the vehicle body floor framework is of a steel plate stamping forming part structure; and welding an upper cover plate with the thickness delta 1.5/Q235-A.F on the upper surface of the cross beam in a butt-welding manner, and forming a closed cavity together with the stamping forming piece.
The lower layer steel plate of the cross beam is provided with phi 14mm fixing holes corresponding to proper positions outside the chassis frame, and the upper cover plate of the cross beam is provided with an access hole corresponding to the fixing holes.
A reinforcing plate is welded on the upper surface of the lower steel plate fixing hole of the cross beam, the reinforcing plate is a delta 4/Q235-A.F steel plate, and a phi 14mm through hole is formed in the steel plate; hexagonal nuts are arranged in the through holes, and the nut limiting supports are welded on the upper surface of the lower steel plate of the cross beam and completely cover the hexagonal nuts.
The nut limiting support is U-shaped, two opposite end portions of the nut limiting support are horizontally bent towards the outer side, screw holes are formed in the bottom edge of the support, and baffle plates are arranged on the two remaining sides of the support.
The inner width of the through nut limiting support is larger than the length of the opposite side of the hexagon nut and smaller than the diameter of the opposite side of the hexagon nut.
The fixed support comprises two curb plates that relative setting, the level establish the U template of two curb plates upper flanks and vertically establish the fixed plate at two curb plate terminal surfaces, and this fixed support adopts delta 5.0Q 235-A.F steel sheet stamping forming, sets up phi 20mm fixed orifices on the U template.
A method for connecting a body and a chassis of a semi-load passenger car comprises the following steps:
hoisting the semi-bearing vehicle body right above the chassis, then dropping until a floor beam of the vehicle body is contacted with a chassis fixing support, and adjusting the front-back, left-right positions of the vehicle body;
when any one hole in the floor beam is consistent with the corresponding chassis fixing support hole, a hexagon bolt, a flat washer and a spring washer are used for pre-connecting with a hexagon nut, and the hexagon nut at the opposite angle and the fixing support are pre-connected in the same way;
then checking whether other nuts are consistent with the fixed support below, and if not, finely adjusting the vehicle body and the hexagon nut until all the bolts can be connected with the nuts;
finally, all the hexagonal bolts and nuts are tightened, the tightening torque is executed at 65N · m and color codes are marked.
The invention has the beneficial effects that: the invention is installed by buckling the floor beam of the vehicle body and the fixed support on the chassis frame, has the characteristics of accurate buckling, connecting and positioning, obviously improved production efficiency, uniform connecting stress and guaranteed connecting strength, and also prolongs the service life of the vehicle.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a front view of a cross member in the vehicle body floor framework of the present invention;
FIG. 2 is a top plan view of a cross member in the vehicle body floor framework of the present invention;
FIG. 3 is a front view of the nut limit bracket of the present invention;
FIG. 4 is a top view of the nut limit bracket of the present invention;
FIG. 5 is a front view of the mounting bracket on the chassis frame of the present invention;
FIG. 6 is a side view of a mounting bracket on the chassis frame of the present invention;
FIG. 7 is a top view of the mounting bracket on the chassis frame of the present invention;
FIG. 8 is a front view of the fastening connection of the cross member and the fixing support of the chassis frame according to the present invention;
FIG. 9 is an enlarged view of a portion of FIG. 8 at A;
FIG. 10 is a schematic view of the present invention in a fastened state;
FIG. 11 is a schematic view of a floor frame and a chassis of the present invention after being fastened.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A connecting structure of a body and a chassis of a semi-load type passenger car is shown in figures 1-11 and comprises a floor framework of the body and a chassis fixing support; the cross beam of the floor framework of the vehicle body is formed by stamping a delta 1.5/Q235-A.F steel plate, and an upper cover plate is welded on the upper surface of the cross beam to form a closed cavity so as to increase the rigidity of the cross beam; a fixing hole is formed in the lower surface of the cross beam, a welding reinforcing plate and a nut limiting bracket are additionally arranged above the fixing hole of the cross beam of the vehicle body floor, and a movable nut is placed in the welding reinforcing plate and the nut limiting bracket;
a plurality of or dozens of fixed supports are welded on the outer sides of the crossbeams on the two sides of the chassis frame, the fixed supports are formed by punching delta 5.0/Q235-A.F steel plates and are provided with fixed holes;
after the whole vehicle body falls on the chassis, a plurality of or dozens of hexagon nuts on the floor beam of the vehicle body are fixed with the fixed support on the chassis frame through hexagon bolts, so that the aim of connecting the vehicle body with the chassis is fulfilled.
The technical scheme of the invention changes the design concept of the existing passenger car floor framework, firstly, the structure of a beam 1 in the passenger car body floor framework is changed into a delta 1.5/Q235-A.F structure from a rectangular tube (the delta 1.5/Q235-A.F represents a steel plate with the material of Q235 and the material thickness of 1.5 mm, and the same applies below) the structure of a steel plate stamping forming piece (U-shaped structure); an upper cover plate with the thickness delta 1.5/Q235-A.F is welded on the upper surface of the cross beam 1 in a butt-welding mode, a closed cavity is formed by the upper cover plate and a stamping forming piece, and the rigidity of the cross beam is improved; phi 14mm fixing holes are formed in the proper positions of the lower layer steel plates of the cross beams, which correspond to the outer sides of the chassis frames, and access holes are formed in the upper cover plates of the cross beams 1, which correspond to the fixing holes, as shown in the figure 1-2;
referring to fig. 8-9, a reinforcing plate 11 is welded on the upper surface of the lower steel plate fixing hole of the cross beam 1, the reinforcing plate 11 is delta 4/Q235-a.f steel plate, and a phi 14mm through hole is formed in the steel plate; then placing the M10 hexagon nut 4 above the reinforcing plate 11, welding the nut limiting bracket 12 on the upper surface of the lower steel plate of the beam, and completely covering the M10 hexagon nut;
referring to fig. 3 and 4, the nut limiting bracket 12 is U-shaped, two opposite end portions of the nut limiting bracket are horizontally bent towards the outside, the bottom edge of the bracket is provided with a screw hole, and the remaining two sides of the bracket are provided with baffle plates; by skillfully designing the structure of the nut limiting bracket 12, the inner width of the nut limiting bracket 12 is larger than the length S (15.39 mm) of the opposite side of the M10 hexagon nut and smaller than the diameter e (17.77 mm) of the opposite side of the M10 hexagon nut, the inner width of the nut limiting bracket 12 is designed to be 17.3mm, and the inner height of the nut limiting bracket is designed to be 13.5mm, so that the nut limiting bracket can be used for limiting the M10 hexagon nut and finely adjusting the position of the hexagon nut;
then, welding a fixed support 2 at a position corresponding to a floor beam outside the chassis frame, wherein the fixed support 2 consists of two side plates 21 which are arranged oppositely, a U-shaped plate 23 which is horizontally arranged on the upper side surfaces of the two side plates and a fixed plate 22 which is vertically arranged on the end surfaces of the two side plates, the fixed support 2 is formed by stamping delta 5.0/Q235-A.F steel plates, and phi 20mm fixed holes are formed in the U-shaped plate 23; channel steel 13 (namely a chassis frame girder) is welded on the fixing plates of the fixed support 2 which are arranged oppositely, and a main beam 14 is clamped between the two channel steels;
a method for connecting a body and a chassis of a half-loading passenger car comprises the steps of buckling the coated and preassembled body and the chassis, hoisting the half-loading body right above the chassis, then dropping the body until a floor beam of the body is contacted with a fixed support of the chassis, adjusting the front, rear, left and right positions of the body, pre-connecting a hexagonal bolt 3 with the strength of a bolt of 10.9 grade, a flat washer 5 and a spring washer 6 with an M10 hexagonal nut 4 when any hole in the floor beam is consistent with the hole of the corresponding fixed support of the chassis, and pre-connecting the hexagonal nut at the opposite angle with the fixed support in the same way, as shown in figures 10 and 11; and checking whether other nuts are consistent with the fixed support below or not, and if not, finely adjusting the vehicle body and the M10 nut until all the bolts can be connected with the nuts.
Finally, all the hexagonal bolts and nuts are tightened, the tightening torque is executed at 65N · m and color codes are marked.
The invention has the following obvious advantages:
1. the production efficiency is remarkably improved, and the buckling time is improved from 40 minutes for 2 persons to 20 minutes for 1 person;
2. the bolts are screwed according to the standard requirement of torque, the connection stress is uniform, and the connection strength is ensured;
3. the electrophoresis layer and the paint surface of each connecting part of the vehicle body and the chassis are kept intact, so that the service life of the vehicle is prolonged;
4. the buckling connection positioning is accurate, the buckling of the connecting structure is adopted, and the buckling size error of the vehicle body and the chassis is not more than 3mm.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (5)
1. The utility model provides a connection structure of half formula of bearing passenger train automobile body and chassis, includes automobile body floor skeleton and chassis frame, its characterized in that:
an upper cover plate is welded on the upper surface of a cross beam of the vehicle body floor framework to form a closed cavity; a fixing hole is formed in the lower surface of the cross beam, and a reinforcing plate and a nut limiting bracket are welded above the fixing hole of the cross beam of the vehicle body floor;
fixed supports are welded on the outer sides of the crossbeams on the two sides of the chassis frame, and fixed holes are formed in the fixed supports;
the vehicle body floor beam is fixed with a fixed support on the chassis frame through a bolt;
a reinforcing plate is welded on the upper surface of the lower steel plate fixing hole of the cross beam, the reinforcing plate is a delta 4/Q235-A.F steel plate, and a phi 14mm through hole is formed in the steel plate; a hexagon nut is arranged in the through hole, and the nut limiting bracket is welded on the upper surface of the lower steel plate of the cross beam to completely cover the hexagon nut;
the nut limiting bracket is U-shaped, two opposite end parts of the nut limiting bracket are horizontally bent outwards, the bottom edge of the bracket is provided with a screw hole, and the rest two sides of the bracket are provided with baffle plates; the inner width of the nut limiting support is larger than the length of the opposite side of the hexagonal nut and smaller than the diameter of the opposite side of the hexagonal nut.
2. A connecting structure of a body and a chassis of a semi-self-supporting passenger car according to claim 1, wherein: a cross beam in the vehicle body floor framework is of a steel plate stamping forming part structure; and welding an upper cover plate with the thickness delta 1.5/Q235-A.F on the upper surface of the cross beam in a butt-welding manner, and forming a closed cavity together with the stamping forming piece.
3. A connecting structure of a body and a chassis of a semi-passenger type passenger car according to claim 1, wherein: the lower layer steel plate of the cross beam is provided with phi 14mm fixing holes corresponding to the proper positions outside the chassis frame, and the upper cover plate of the cross beam is provided with an access hole corresponding to the fixing holes.
4. A connecting structure of a body and a chassis of a semi-passenger type passenger car according to claim 1, wherein: the fixed support comprises two curb plates that relative setting, the level establish the U template of two curb plates upper flanks and vertically establish the fixed plate at two curb plate terminal surfaces, and this fixed support adopts delta 5.0Q 235-A.F steel sheet stamping forming, sets up phi 20mm fixed orifices on the U template.
5. A method of connecting a connecting structure of a body and a chassis of a semi-passenger vehicle according to claim 1, characterized in that: the connecting method comprises the following steps:
hoisting the semi-bearing vehicle body right above the chassis, then dropping until a floor beam of the vehicle body is contacted with a chassis fixing support, and adjusting the front-back, left-right positions of the vehicle body;
when any one hole in the floor beam is consistent with the corresponding chassis fixing support hole, a hexagon bolt, a flat washer and a spring washer are used for pre-connecting with a hexagon nut, and the hexagon nut at the opposite angle and the fixing support are pre-connected in the same way;
then checking whether other nuts are consistent with the fixed support below, and if not, finely adjusting the vehicle body and the hexagon nut until all the bolts can be connected with the nuts;
finally, all the hexagonal bolts and nuts are tightened, the tightening torque is executed at 65N · m and color codes are marked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710409269.9A CN107140030B (en) | 2017-06-02 | 2017-06-02 | Connecting structure and method for body and chassis of semi-load type passenger car |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710409269.9A CN107140030B (en) | 2017-06-02 | 2017-06-02 | Connecting structure and method for body and chassis of semi-load type passenger car |
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| Publication Number | Publication Date |
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| CN107140030A CN107140030A (en) | 2017-09-08 |
| CN107140030B true CN107140030B (en) | 2023-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710409269.9A Active CN107140030B (en) | 2017-06-02 | 2017-06-02 | Connecting structure and method for body and chassis of semi-load type passenger car |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109017279B (en) * | 2018-09-30 | 2024-04-02 | 安徽安凯汽车股份有限公司 | Rear-mounted passenger train urea jar fixed knot constructs |
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| CN107140030A (en) | 2017-09-08 |
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