CN210912615U - Underbody structure for a load-bearing vehicle body - Google Patents

Underbody structure for a load-bearing vehicle body Download PDF

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Publication number
CN210912615U
CN210912615U CN201921196656.XU CN201921196656U CN210912615U CN 210912615 U CN210912615 U CN 210912615U CN 201921196656 U CN201921196656 U CN 201921196656U CN 210912615 U CN210912615 U CN 210912615U
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CN
China
Prior art keywords
leaf spring
fixed bolster
spring fixed
plate
backup pad
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Active
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CN201921196656.XU
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Chinese (zh)
Inventor
赵堃
田峰
荣升格
邹杰
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Shandong Wuzheng Group Co Ltd
Zhejiang Feidie Automobile Manufacturing Co Ltd
Original Assignee
Shandong Wuzheng Group Co Ltd
Zhejiang Feidie Automobile Manufacturing Co Ltd
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Priority to CN201921196656.XU priority Critical patent/CN210912615U/en
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Publication of CN210912615U publication Critical patent/CN210912615U/en
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Abstract

The utility model relates to the technical field of automobile production, in particular to an automobile body substructure for a load-bearing type automobile body, which comprises two longitudinal beam assemblies, wherein the two longitudinal beam assemblies are fixedly connected through a first cross beam, a second cross beam, a third cross beam and a fourth cross beam, the middle sections of the third cross beam and the fourth cross beam are fixedly connected through short longitudinal beams, the longitudinal beam assemblies comprise a first plate spring fixing support assembly, a second plate spring fixing support assembly, a rear longitudinal beam, a longitudinal beam stiffening beam and a third cross beam connecting plate, the first plate spring fixing support assembly and the second plate spring fixing support assembly are fixed on the rear longitudinal beam at equal intervals, and the longitudinal beam stiffening beam is combined on the rear longitudinal beam. The method is beneficial to improving the mode of the vehicle body and reducing the dynamic noise of the vehicle in running.

Description

Underbody structure for a load-bearing vehicle body
Technical Field
The utility model relates to an automotive production technical field specifically is an automobile body substructure for bearing formula automobile body.
Background
According to the traditional plate spring type bearing vehicle body, four simple supports are arranged on the front side, the rear side and the right side of a plate spring for fixing, and the vehicle body side support and the vehicle body right side support are independent from each other and have no connection relation, so that the vehicle body structure can only meet basic strength requirements, the contribution of the vehicle body structure to the promotion of the hollow road surface and the torsional rigidity of the vehicle body and the promotion of the rigidity of two directions of a fixing point X, Y of the plate spring is very little, and the dynamic noise in the driving process of a vehicle is relatively large.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a vehicle body substructure for bearing formula automobile body to solve the problem that proposes among the above-mentioned background art.
The technical scheme of the utility model is that: a lower vehicle body structure for a load-bearing vehicle body comprises two longitudinal beam assemblies symmetrically arranged along the center line of the longitudinal axis of the vehicle body, wherein the two longitudinal beam assemblies are fixedly connected through a first cross beam, a second cross beam, a third cross beam and a fourth cross beam, the middle sections of the third cross beam and the fourth cross beam are fixedly connected through a short longitudinal beam, each longitudinal beam assembly comprises a first leaf spring fixing support assembly, a second leaf spring fixing support assembly, a rear longitudinal beam, a longitudinal beam reinforcing beam and a third cross beam connecting plate, the first leaf spring fixing support assemblies and the second leaf spring fixing support assemblies are all fixed on the rear longitudinal beam at intervals, the longitudinal beam reinforcing beam is combined on the rear longitudinal beam, all the third cross beam connecting plates are fixedly connected with the third cross beam, and all the first leaf spring fixing support assemblies are fixedly connected with the end part of the second cross beam, and all the second plate spring fixing support assemblies are fixedly connected with the end part of the fourth cross beam.
Preferably, first leaf spring fixed bolster assembly is including preceding backup pad in first leaf spring fixed bolster, the outer backup pad of first leaf spring fixed bolster, the first leaf spring fixed bolster, back backup pad and interior reinforcing plate in back backup pad, the first leaf spring fixed bolster, and first leaf spring fixed bolster is U-shaped and its opening orientation back longeron in the cross-section on back longeron length direction, the bottom welded fit of first leaf spring fixed bolster top and back longeron, the side of first leaf spring fixed bolster is provided with the anterior mounting hole of leaf spring, one side that first leaf spring fixed bolster was close to the second crossbeam is all installed to preceding backup pad in the first leaf spring fixed bolster and back backup pad in the first leaf spring fixed bolster, the one end fixed connection of second crossbeam is all with the backup pad in preceding backup pad in the first leaf spring fixed bolster and the back backup pad in the first leaf spring fixed bolster, the plane of preceding backup pad in the first leaf spring fixed bolster and back backup pad in the first leaf spring fixed bolster is parallel to each other and with the one end fixed The central line of back longeron is perpendicular, interior reinforcing plate is installed inside first leaf spring fixed bolster and its place plane is parallel with the place plane of preceding backup pad in the first leaf spring fixed bolster, the outer backup pad of first leaf spring fixed bolster is installed in one side that second crossbeam is kept away from to first leaf spring fixed bolster, and the cross-section of first leaf spring fixed bolster on second crossbeam length direction is the U-shaped.
Preferably, the second plate spring fixing support assembly comprises a second plate spring fixing support, a second plate spring fixing support inner front support plate, a second plate spring fixing support inner rear support plate, a sleeve, a second plate spring fixing support connecting plate and a second plate spring fixing support outer support plate which are parallel to the central line of the rear longitudinal beam in the length direction, the second plate spring fixing support is linear and has a U-shaped cross section in the length direction of the rear longitudinal beam, the second plate spring fixing support inner front support plate and the second plate spring fixing support inner rear support plate are arranged on one side of the second plate spring fixing support close to the fourth beam, the second plate spring fixing support inner front support plate and the second plate spring fixing support inner rear support plate are fixedly connected with one end of the fourth beam, the planes of the front support plate and the rear support plate in the second plate spring fixing support are mutually parallel The second plate spring fixing support is parallel to and perpendicular to the central line of the rear longitudinal beam, an outer supporting plate of the second plate spring fixing support is installed on one side, away from the fourth cross beam, of the second plate spring fixing support, the cross section of the second plate spring fixing support in the length direction of the fourth cross beam is U-shaped, a second plate spring fixing support connecting plate is installed at the bottom of the second plate spring fixing support, a plate spring rear mounting hole 2502 is formed in the side face of the second plate spring fixing support connecting plate, and the sleeve is inserted into the plate spring rear mounting hole 2502.
Preferably, first leaf spring fixed bolster assembly is still including first leaf spring fixed bolster shrouding, the side open end fixed connection of preceding backup pad in first leaf spring fixed bolster shrouding and the first leaf spring fixed bolster, the place plane mutually perpendicular of backup pad behind in first leaf spring fixed bolster shrouding place plane and the first leaf spring fixed bolster.
Preferably, the second plate spring fixing support assembly further comprises a second plate spring fixing support sealing plate, the second plate spring fixing support sealing plate is fixedly connected with the side opening end of the front supporting plate in the second plate spring fixing support, and the plane of the second plate spring fixing support sealing plate is perpendicular to the plane of the rear supporting plate in the second plate spring fixing support.
Preferably, the cross sections of the rear longitudinal beam and the short longitudinal beam in the length direction of the rear longitudinal beam are U-shaped, the cross sections of the first cross beam, the second cross beam, the third cross beam and the fourth cross beam in the length direction of the fourth cross beam are also U-shaped, and the longitudinal beam reinforcing beam is fixedly installed in the rear longitudinal beam through a plurality of small partition plates.
Preferably, the side that the back longeron is located the third crossbeam connecting plate is provided with the articulated seat of bumper shock absorber.
The utility model discloses an improve and provide a body substructure for bearing formula automobile body here, compare with prior art, have following improvement and advantage:
one is as follows: the two longitudinal beam assemblies are fixedly connected through the first cross beam, the second cross beam, the third cross beam and the fourth cross beam, the strength and the rigidity of a leaf spring mounting point are improved, the reliability of the automobile body can be improved, and the probability of the automobile body cracking is reduced;
the second step is as follows: the shape of the continuous matching structure arch bridge of parts such as the front support plate in the first plate spring fixing support, the back support plate in the first plate spring fixing support, the outer support plate of the first plate spring fixing support, the second beam and the like achieves the purpose of transferring and decomposing impact force, the first plate spring fixing support is effectively supported, the stress of the first plate spring fixing support is reduced, and the service life of a vehicle is prolonged.
And thirdly: the mounting modes of the first plate spring fixing support assembly, the second cross beam and the fourth cross beam are favorable for improving the mode of a vehicle body and reducing the dynamic noise of the vehicle in running;
drawings
The invention is further explained below with reference to the figures and examples:
FIG. 1 is a schematic view of the installation position of the present invention with a vehicle body;
fig. 2 is a schematic view of the installation position of the present invention and the plate spring;
fig. 3 is a schematic view of a partial three-dimensional structure of the present invention;
fig. 4 is a top view of the present invention;
fig. 5 is an exploded view of the three-dimensional structure of the present invention;
fig. 6 is an exploded perspective view of the longitudinal beam assembly of the present invention;
fig. 7 is a schematic perspective view of a first plate spring fixing bracket assembly according to the present invention;
fig. 8 is an exploded perspective view of the first leaf spring fixing bracket assembly of the present invention;
fig. 9 is a schematic perspective view of a second plate spring fixing bracket assembly according to the present invention;
fig. 10 is an exploded perspective view of a second leaf spring fixing bracket assembly according to the present invention;
FIG. 11 is a cross-sectional view taken along line A-A of FIG. 4;
FIG. 12 is an enlarged view at C of FIG. 11;
FIG. 13 is a cross-sectional view taken along line B-B of FIG. 4;
FIG. 14 is an enlarged view at D of FIG. 13;
description of reference numerals:
a vehicle body lower portion structure 1, a floor panel 2, a side member assembly 3, a fourth cross member 4, a short side member 5, a third cross member 6, a second cross member 7, a first cross member 8, a first plate spring fixing bracket assembly 9, a second plate spring fixing bracket assembly 10, a rear side member 11, an outer side wall 1101, an inner side wall 1102, a bottom side wall 1103, a flange side 1104, a third cross member connecting plate 12, a small partition plate 13, a side member reinforcing beam 14, a side wall 1401, a side wall 1402, a bottom side 1403, a first plate spring fixing bracket 15, a flange side 1501, a flange side three 1502, a flange side four 1503, a plate spring front mounting hole 1504, a flange side five 1505, a flange five 1506, an inner reinforcing plate 16, a flange side six 1601, a first plate spring fixing bracket inner front support plate 17, a flange side seven 1701, a flange side eight 1702, a flange side nine 1703, a flange ten 1704, a first plate spring fixing bracket inner rear support plate 18018, a flange eleven 1801, twelve 1802 flange faces, thirteen 1803 flange faces, fourteen 1804 flange faces, a first plate spring fixing support closing plate 19, fifteen 1901 flange faces, sixteen 1902 flange faces, a first plate spring fixing support outer support plate 20, seventeen 2001 flange faces, eighteen 2002 flange faces, nineteen 2004 flange faces, a second plate spring fixing support 21, twenty 2101 flange faces, two 2102 flange faces, two 2103 flange faces, two four 2105 flange faces, a second plate spring fixing support inner front support plate 22, two five 2201 flange faces, two six 2202 flange faces, two seven flange faces 2203, two 220eight flange faces, two nine 2205 flange faces, a second plate spring fixing support inner rear support plate 23, flange faces 230thirty 1, three one flange faces, three 2303 flange faces, three 2304 flange faces, three four 2305 flange faces, a sleeve 24, a second plate spring fixing support plate 25, three five flange faces 2501 flange faces, rear plate spring mounting holes 2502 flange faces 2503 flange faces, the plate spring fixing support comprises a second plate spring fixing support sealing plate 26, three eight flange faces 2601, three nine flange faces 2602, a second plate spring fixing support outer support plate 27, forty 2701 flange faces, four to one flange faces 2702, four to two flange faces 2703 flange faces, a plate spring 28 and a damper 29.
Detailed Description
The present invention will be described in detail below, and it is apparent that the technical solutions in the embodiments of the present invention are described clearly and completely. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model discloses an improve and provide a car body substructure for bearing formula automobile body here (coordinate system direction in all drawings all uses + X as the locomotive to the direction of rear of a vehicle, -X is the direction of rear of a vehicle to the locomotive, -Y is vehicle center toward the side direction, + Y is vehicle center toward the right side direction, + Z is the direction of vehicle bottom to upper portion, -Z is the direction of vehicle upper portion to bottom and is accurate):
as shown in fig. 1-14, a lower vehicle body structure for a load-bearing vehicle body, the lower vehicle body structure 1 includes two longitudinal beam assemblies 3 symmetrically arranged along a longitudinal centerline of a vehicle body, the two longitudinal beam assemblies 3 are fixedly connected by a first cross beam 8, a second cross beam 7, a third cross beam 6 and a fourth cross beam 4, middle sections of the third cross beam 6 and the fourth cross beam 4 are fixedly connected by a short longitudinal beam 5, the longitudinal beam assembly 3 includes a first leaf spring fixing bracket assembly 9, a second leaf spring fixing bracket assembly 10, a rear cross beam 11, a longitudinal beam reinforcing beam 14 and a third cross beam connecting plate 12, the first leaf spring fixing bracket assembly 9 and the second leaf spring fixing bracket assembly 10 are fixed on the rear cross beam 11 at intervals, the longitudinal beam reinforcing beam 14 is combined on the rear cross beam 11, all the third cross beam connecting plates 12 are fixedly connected with the third cross beam 6, all first leaf spring fixed bolster assemblies 9 all with the tip fixed connection of second crossbeam 7, all second leaf spring fixed bolster assemblies 10 all with the tip fixed connection of fourth crossbeam 4, the central line of first crossbeam 8, second crossbeam 7, third crossbeam 6 and fourth crossbeam 4 is on a parallel with + Y direction, the length direction of back longeron 11 is on a parallel with + X direction, floor 2 is installed at the top of automobile body substructure 1.
The sections of the rear longitudinal beam 11 and the short longitudinal beam 5 in the + X direction are U-shaped, the sections of the first cross beam 8, the second cross beam 7, the third cross beam 6 and the fourth cross beam 4 in the + Y direction are also U-shaped, the longitudinal beam reinforcing beam 14 is fixedly arranged in the rear longitudinal beam 11 through a plurality of small partition plates 13,
the rear longitudinal beam 11 is U-shaped in the + Z direction and has an upward opening, the rear longitudinal beam 11 extends along the X direction with a uniform cross section, the lower surface of the rear longitudinal beam is provided with a bottom surface I1103, two sides of the rear longitudinal beam are provided with an outer wall surface 1101, an inner wall surface 1102 and a flange surface I1104 positioned at the tops of the outer wall surface 1101 and the inner wall surface 1102;
the side member reinforcing beam 1414 has a U-shaped opening structure in the + Z direction, the opening size of which is smaller than that of the rear side member 1111, and a first sidewall surface 1401, a second sidewall surface 1402, and a second bottom surface 1403 are provided on both sides.
The side member reinforcing beam 14 is connected to the upper portions of the outer wall surface 1101 and the inner wall surface 1102 of the rear side member 11 by the first side wall surface 1401 and the second side wall surface 1402 by spot welding.
The first cross beam 8, the second cross beam 7, the third cross beam 6, the fourth cross beam 4 and the short longitudinal beam 5 are all + Z-direction open U-shaped cross sections, flange surfaces parallel to the XY surface are arranged at the top ends of the U-shaped cross sections, and the rear end of the U-shaped cross section is connected with the floor 2 through spot welding.
The first plate spring fixing support assembly 9 comprises a first plate spring fixing support 15, a first plate spring fixing support outer support plate 20, a first plate spring fixing support inner front support plate 17, a first plate spring fixing support inner rear support plate 18 and an inner reinforcing plate 16, wherein the cross section of the first plate spring fixing support 15 in the length direction of the rear longitudinal beam 11 is U-shaped, the opening of the first plate spring fixing support 15 faces the rear longitudinal beam 11, the top of the first plate spring fixing support 15 is in welded fit with the bottom of the rear longitudinal beam 11, a plate spring front mounting hole 1504 is arranged on the side surface of the first plate spring fixing support 15, the first plate spring fixing support inner front support plate 17 and the first plate spring fixing support inner rear support plate 18 are both mounted on one side of the first plate spring fixing support 15 close to the second cross beam 7, the first plate spring fixing support inner front support plate 17 and the first plate spring fixing support inner rear support plate 18 are both fixedly connected with one end of the second cross, the plane of the place of back backup pad 18 is parallel to each other and perpendicular with the central line of back longeron 11 in the interior preceding backup pad 17 of first leaf spring fixed bolster and the first leaf spring fixed bolster, interior reinforcing plate 16 is installed inside first leaf spring fixed bolster 15 and the place plane of its place is parallel with the place plane of preceding backup pad 17 in the first leaf spring fixed bolster, the outer backup pad 20 of first leaf spring fixed bolster is installed in one side that second crossbeam 7 is kept away from to first leaf spring fixed bolster 15, and first leaf spring fixed bolster 15 is the U-shaped in the ascending cross-section of second crossbeam 7 length direction.
The cross section of the first plate spring fixing support 15 in the + X direction is of a U-shaped opening structure, the three flange faces 1502 in the horizontal direction are arranged on two front sides of the first plate spring fixing support 15, the two flange faces 1501 which are distributed on two sides in the XZ direction are arranged at the top of the first plate spring fixing support 15, the tail of the first plate spring fixing support is provided with a certain angle which is opened outwards, the five flange faces 1506 distributed on two sides are provided with two plate spring front mounting holes 1504 which are arranged at the lower part of the five flange faces 1506, the two plate spring front mounting holes 1504 are used for mounting the plate spring 28, the four flange faces 1503 matched with the inner reinforcing plate 16 are arranged on two side planes of the first plate spring fixing support 15, the inner reinforcing plate 16 is of a U-shaped opening structure in the + X direction, the two sides of the inner reinforcing plate 16 are provided with six flange faces 1601.
The structure of the front supporting plate 17 in the first plate spring fixing support is Z-shaped, the top of the front supporting plate is provided with a flange face seven 1701 arranged in the-X direction, the bottom of the first plate spring fixing support 15 is provided with a flange face nine 1703 arranged in the arc line direction in the + X direction and the + Z direction, the outer side of the first plate spring fixing support is provided with a flange face ten 1704 parallel to the XZ direction, the inner side of the first plate spring fixing support 15 is provided with a flange face eight 1702 parallel to the YZ direction, and the angles of the two flange faces of the flange face ten 1704 and the flange face eight 1702 are approximately perpendicular.
The structure of the rear support plate 18 in the first plate spring fixing support and the front support plate 17 in the first plate spring fixing support are arranged in a front-back approximately symmetrical mode, a flange face twelve 1802, a flange face thirteen 1803 and a flange face fourteen 1804 which are of similar structures are arranged, the top of the flange face eleven 1801 arranged in the + X direction is arranged, the flange face twelve 1803 and the flange face nine 1703 are connected together in a spot welding mode through the flange face thirteen 1803 at the bottom, two parts are made to be of U-shaped structures with openings facing the + Z direction after being welded, and the angles of the two flange faces twelve 1802 and the fourteen 1804 are approximately perpendicular to each other.
The side of the first plate spring fixing bracket 1515 is provided with a flange face five 1505 for spot welding of the inner rear support plate 18 of the first plate spring fixing bracket with the flange face fourteen 1804 and the flange face ten 1704 of the inner front support plate 17 of the first plate spring fixing bracket, so as to form an approximate funnel shape with an upward opening, and simultaneously ensure that the height of the front mounting hole 1504 of the plate spring is lower than the height of the bottommost of the inner front support plate 17 of the first plate spring fixing bracket and the inner rear support plate 18 of the first plate spring fixing bracket.
The outer support plate 20 of the first plate spring fixing bracket has a U-shaped opening structure in the + Z direction, and is provided with a flange face seventeen 2001, a flange face eighteen 2002 and a flange face nineteen 2004 on the inner side thereof, and is connected to the flange face five 1505 of the first plate spring fixing bracket 15 by spot welding.
A flange surface 2003 is provided on the outer side of the first plate spring fixing bracket outer support plate 20 and is connected to other parts such as a vehicle body by spot welding.
In the process of vehicle travel, due to impact of a road surface, impact force is transmitted to all parts of a vehicle body from the first plate spring fixing support 15 by the plate spring 28 according to the black arrow direction in fig. 12, a plurality of closed cavities marked as E, F, G are formed through the continuous matching structure of the parts such as the first plate spring fixing support inner front support plate 17, the first plate spring fixing support inner rear support plate 18, the first plate spring fixing support outer support plate 20, the second cross beam 7 and the like, so that the purpose of transmitting and decomposing the impact force is achieved, Y, X effective support is formed for the first plate spring fixing support 15, the stress of the first plate spring fixing support 15 is reduced, and the service life of the vehicle is prolonged.
The second plate spring fixing support assembly 10 comprises a second plate spring fixing support 21, a second plate spring fixing support inner front support plate 22, a second plate spring fixing support inner rear support plate 23, a sleeve 24, a second plate spring fixing support connecting plate 25 and a second plate spring fixing support outer support plate 27, wherein the length direction of the second plate spring fixing support inner front support plate 22, the second plate spring fixing support inner rear support plate 23, the sleeve 24, the second plate spring fixing support connecting plate 25 and the second plate spring fixing support outer support plate 27 are parallel to the central line of the rear longitudinal beam 11, the second plate spring fixing support 21 is linear, the cross section of the second plate spring fixing support in the length direction of the rear longitudinal beam 11 is U-shaped, the second plate spring fixing support inner front support plate 22 and the second plate spring fixing support inner rear support plate 23 are both installed on one side of the second plate spring fixing support 21 close to the fourth cross beam 4, the second plate fixing support inner front support plate 22 and the second plate spring, the planes of the front supporting plate 22 in the second plate spring fixing support and the rear supporting plate 23 in the second plate spring fixing support are parallel to each other and perpendicular to the central line of the rear longitudinal beam 11, the outer supporting plate 27 of the second plate spring fixing support is installed on one side, away from the fourth cross beam 4, of the second plate spring fixing support 21, the section of the second plate spring fixing support 21 in the length direction of the fourth cross beam 4 is U-shaped, the connecting plate 25 of the second plate spring fixing support is installed at the bottom of the second plate spring fixing support 21, the side face of the connecting plate 25 of the second plate spring fixing support is provided with a plate spring rear mounting hole 2502, and the sleeve 24 is inserted into the plate spring rear mounting hole 2502.
The second plate spring fixing support 21 is of a U-shaped opening structure in the + Z direction, the bottom of the second plate spring fixing support is provided with a second flange face 2102 parallel to the XY direction, the side face of the second plate spring fixing support 21 is parallel to a second flange face 2103 in the XZ direction, two extending flange faces twenty 2101 are arranged on two sides of the upper portion of the second flange face 2103, a plurality of second flange faces 2105 forming a certain angle with the flange faces twenty 2101 are arranged at the tail end of the second flange face 2105, and the second flange faces 2105 are connected with other parts such as a vehicle body in a spot welding mode.
The second leaf spring fixing bracket connecting plate 2525 is provided with a flange surface thirty-five 2501, a flange surface pseudo-ginseng 2503, a side flange surface two 2103 and a bottom flange surface two 2102 of the second leaf spring fixing bracket 2121 which are connected together through spot welding.
The structure of the front supporting plate 22 in the second plate spring fixing support is Z-shaped, the top of the front supporting plate is provided with two and five flange surfaces 2201 arranged in the-X direction, the bottom of the front supporting plate is provided with two and seven flange surfaces 2203 arranged in the + X direction and the + Z direction in an arc line, the outer side of the bottom of the front supporting plate is provided with two and eight flange surfaces 2204 and two and nine flange surfaces 2205 which are parallel to the XZ direction, the inner side of the front supporting plate is provided with two and six flange surfaces 2202 which are parallel to the YZ direction, and the angles of the two and nine flange surfaces 2205 and.
The structure of the rear supporting plate 23 in the second plate spring fixing support and the structure of the front supporting plate 22 in the second plate spring fixing support are arranged approximately symmetrically, flange faces thirty 2301, three flange faces 2302, three flange faces 2303, three flange faces 2304 and three flange faces 2305 which are provided with similar structures are arranged, the flange faces twenty-seven 2203 and the flange faces thirty-two 2303 which are arranged through bottom inclined planes are connected together in a spot welding mode, and the two parts are made into a U-shaped structure with an opening facing the + Z direction after being welded.
The flange surfaces twenty 2205 and thirty 2305 of the second plate spring fixing bracket inner front support plate 22 and the second plate spring fixing bracket inner rear support plate 23 are connected to the flange surface twenty 2101 on the inner side of the second plate spring fixing bracket 21, the flange surface two 2103, and the inner flange surface 2503 of the second plate spring fixing bracket connection plate 2525 by spot welding to form a funnel shape with an approximately upward opening inside the second plate spring fixing bracket 21.
An outer support plate 2727 of the second plate spring fixing support is of a U-shaped opening structure in the + Z direction, and a circle of the opening structure is provided with a flange face forty 2701, a flange face four-in-one 2702 and a flange face four-in-two 2703 in different directions.
The flange surface forty 2701 of the second leaf spring fixing bracket outer support plate 27 is connected to the flange surface twenty 2101 and the flange surface two 2103 on the outer side of the second leaf spring fixing bracket 2121 and the flange surface notoginseng 2503 on the outer side of the second leaf spring fixing bracket connecting plate 2525 by spot welding, and is formed into a shape of a funnel having an approximately upward opening on the outer side of the second leaf spring fixing bracket 21.
The sleeve 24 is a tubular structure with a uniform cross section and is connected with 2 plate spring rear mounting holes 2502 on the second plate spring fixing bracket connecting plate 25 through carbon dioxide arc welding.
The first plate spring fixing support assembly 9 further comprises a first plate spring fixing support sealing plate 19, the first plate spring fixing support sealing plate 19 is fixedly connected with the side opening end of the front support plate 17 in the first plate spring fixing support, the plane of the first plate spring fixing support sealing plate 19 is perpendicular to the plane of the rear support plate 18 in the first plate spring fixing support, the first plate spring fixing support sealing plate 19 is in a U-shaped opening structure in the + X direction, the top of the first plate spring fixing support sealing plate is provided with a flange surface 1902 in the + X direction, the opening positions on two sides of the first plate spring fixing support sealing plate 19 are provided with a flange surface fifteen 1901, the flange surface fifteen 1901 is attached to and connected with the flange surface five 1506 of the first plate spring fixing support 15 through spot welding, so that the U-shaped opening in the + X direction of the first plate spring fixing support 15 is closed, and the angle of the flange surface fifteen 1901 is parallel to the angle of the flange, the flange face sixteen 1902 is connected with the bottom of the rear longitudinal beam 11 through electric welding.
The second plate spring fixing support assembly 10 further comprises a second plate spring fixing support sealing plate 26, the second plate spring fixing support sealing plate 26 is fixedly connected with the side opening end of the front support plate 22 in the second plate spring fixing support, the plane of the second plate spring fixing support sealing plate 26 is perpendicular to the plane of the rear support plate 23 in the second plate spring fixing support, the second plate spring fixing support sealing plate 26 is of a U-shaped opening structure, the opening size of the second plate spring fixing support sealing plate is smaller than that of the second plate spring fixing support connecting plate 25, the second plate spring fixing support sealing plate 26 can be placed into the second plate spring fixing support connecting plate 25 and connected through spot welding, the U-shaped opening of the second plate spring fixing support connecting plate 25 is sealed, the U-shaped opening structure is formed in the + X direction, the opening size of the second plate spring fixing support sealing plate 26 is smaller than that of the second plate spring fixing support connecting plate 25, and the second plate spring fixing support sealing plate 26 can be placed into the second plate spring fixing support connecting plate 25 and the panax notoginseng 2503 is spot-welded to close the U-shaped opening of the second plate spring fixing bracket connecting plate 25 in the + X direction, and the second plate spring fixing bracket sealing plate 26 is provided with a thirty-nine flange surface 2602 and is spot-welded to the rear portions of the outer wall surface 1101 and the inner wall surface 1102.
The cross sections of the rear longitudinal beam 11 and the short longitudinal beam 5 in the length direction of the rear longitudinal beam 11 are U-shaped, the cross sections of the first cross beam 8, the second cross beam 7, the third cross beam 6 and the fourth cross beam 4 in the length direction of the fourth cross beam 4 are also U-shaped, the longitudinal beam reinforcing beam 14 is fixedly installed in the rear longitudinal beam 11 through a plurality of small partition plates 13, and the second bottom surface 1403 of the longitudinal beam reinforcing beam 14 is connected with the small partition plates 13 through spot welding.
And a shock absorber 29 hinged seat is arranged at the side of the third beam connecting plate 12 of the rear longitudinal beam 11, so that the shock absorber 29 is conveniently installed.
Since the rear fixing point of the plate spring 28 is similar in structure and stress to the front fixing point of the plate spring 28, taking the front fixing point of the plate spring 28 as an example, the parts of the vehicle body at the fixing point of the plate spring form an arch bridge type structure, and the height is slowly and uniformly changed when the vehicle body is changed into the low position, as shown by the sections of fig. 11 to 14.
In the process of vehicle travel, due to impact of a road surface, the plate spring 28 transmits impact force to all parts of a vehicle body from the second plate spring fixing support 21 according to the direction of a black arrow in fig. 14, and a plurality of closed cavities marked as H, I, J are formed through the continuous matching structure of the parts such as the inner front support plate 22 of the second plate spring fixing support, the inner rear support plate 23 of the second plate spring fixing support, the outer support plate 27 of the second plate spring fixing support, the second cross beam 7 and the like to achieve the purpose of transmitting and decomposing the impact force, so that Y, X-direction effective support is formed for the second plate spring fixing support 21, the self stress of the second plate spring fixing support 21 is reduced, and the service life of the vehicle is prolonged.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. 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 invention. Thus, the present invention 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 (7)

1. A vehicle body lower portion structure for a load-carrying vehicle body, characterized in that: the lower part structure (1) of the automobile body comprises two longitudinal beam assemblies (3) symmetrically arranged along the central line of the longitudinal axis of the automobile body, the two longitudinal beam assemblies (3) are fixedly connected through a first cross beam (8), a second cross beam (7), a third cross beam (6) and a fourth cross beam (4), the middle sections of the third cross beam (6) and the fourth cross beam (4) are fixedly connected through a short longitudinal beam (5), the longitudinal beam assembly (3) comprises a first leaf spring fixing support assembly (9), a second leaf spring fixing support assembly (10), a rear longitudinal beam (11), a longitudinal beam reinforcing beam (14) and a third cross beam connecting plate (12), the first leaf spring fixing support assembly (9) and the second leaf spring fixing support assembly (10) are fixed on the rear longitudinal beam (11) at intervals, and the longitudinal beam reinforcing beam (14) is combined on the rear longitudinal beam (11), all third crossbeam connecting plates (12) are fixedly connected with the third crossbeam (6), all first plate spring fixing support assemblies (9) are fixedly connected with the end part of the second crossbeam (7), and all second plate spring fixing support assemblies (10) are fixedly connected with the end part of the fourth crossbeam (4).
2. A vehicle body lower portion structure for a vehicular body according to claim 1, wherein: first leaf spring fixed bolster assembly (9) is including first leaf spring fixed bolster (15), first leaf spring fixed bolster outer support plate (20), preceding backup pad (17) in the first leaf spring fixed bolster, back backup pad (18) and interior reinforcing plate (16) in the first leaf spring fixed bolster, first leaf spring fixed bolster (15) are U-shaped and its opening towards back longeron (11) at the cross-section on back longeron (11) length direction, the bottom welded fit of first leaf spring fixed bolster (15) top and back longeron (11), the side of first leaf spring fixed bolster (15) is provided with the anterior mounting hole of leaf spring (1504), backup pad (17) and back backup pad (18) are all installed in first leaf spring fixed bolster (15) and are close to one side of second crossbeam (7) in preceding backup pad (17) in the first leaf spring fixed bolster and back backup pad (18) in the first leaf spring fixed bolster all With the one end fixed connection of second crossbeam (7), the place plane of back backup pad (18) is parallel to each other and perpendicular with the central line of back longeron (11) in preceding backup pad (17) and the first leaf spring fixed bolster in the first leaf spring fixed bolster, interior reinforcing plate (16) are installed inside first leaf spring fixed bolster (15) and the place plane of its place plane and the first leaf spring fixed bolster in the place plane of preceding backup pad (17) parallel, the outer backup pad (20) of first leaf spring fixed bolster are installed in one side that second crossbeam (7) were kept away from in first leaf spring fixed bolster (15), and first leaf spring fixed bolster (15) are the U-shaped in the cross-section of second crossbeam (7) length direction.
3. A vehicle body lower portion structure for a vehicular body according to claim 1, wherein: second leaf spring fixed bolster assembly (10) is including the parallel second leaf spring fixed bolster (21) of length direction and back longeron (11) central line, the interior back backup pad (23) of preceding backup pad (22), second leaf spring fixed bolster of second leaf spring fixed bolster, sleeve pipe (24), second leaf spring fixed bolster connecting plate (25) and the outer backup pad (27) of second leaf spring fixed bolster in second leaf spring fixed bolster, second leaf spring fixed bolster (21) are the straight line shape and the cross-section on back longeron (11) length direction is the U-shaped, backup pad (23) are installed in preceding backup pad (22) and the second leaf spring fixed bolster in second leaf spring fixed bolster, one side that is close to fourth crossbeam (4) in preceding backup pad (22) in the second leaf spring fixed bolster and back backup pad (23) in the second leaf spring fixed bolster in second leaf spring fixed bolster (21), preceding backup pad (22) in the second leaf spring fixed bolster and back backup pad (23) in the second leaf spring fixed bolster All with the one end fixed connection of fourth crossbeam (4), the place plane of back backup pad (23) is parallel to each other and perpendicular with the central line of back longeron (11) in preceding backup pad (22) and the second leaf spring fixed bolster in the second leaf spring fixed bolster, second leaf spring fixed bolster outer backup pad (27) are installed in one side that fourth crossbeam (4) were kept away from in second leaf spring fixed bolster (21), and second leaf spring fixed bolster (21) is the U-shaped in the cross-section on fourth crossbeam (4) length direction, the bottom at second leaf spring fixed bolster (21) is installed in second leaf spring fixed bolster connecting plate (25), the side of second leaf spring fixed bolster connecting plate (25) is provided with leaf spring rear portion mounting hole (2502), sleeve pipe (24) are pegged graft in leaf spring rear portion mounting hole (2502).
4. The vehicle body lower structure for a load-carrying vehicle body according to claim 2, wherein: first leaf spring fixed bolster assembly (9) are still including first leaf spring fixed bolster shrouding (19), side open end fixed connection of preceding backup pad (17) in first leaf spring fixed bolster shrouding (19) and the first leaf spring fixed bolster, the place plane mutually perpendicular of backup pad (18) behind in first leaf spring fixed bolster shrouding (19) place plane and the first leaf spring fixed bolster.
5. A vehicle body lower portion structure for a vehicular body according to claim 3, wherein: second leaf spring fixed bolster assembly (10) is still including second leaf spring fixed bolster shrouding (26), side open end fixed connection of preceding backup pad (22) in second leaf spring fixed bolster shrouding (26) and the second leaf spring fixed bolster, the place plane mutually perpendicular of backup pad (23) behind second leaf spring fixed bolster place plane and the second leaf spring fixed bolster.
6. A vehicle body lower portion structure for a vehicular body according to claim 1, wherein: the cross sections of the rear longitudinal beam (11) and the short longitudinal beam (5) in the length direction of the rear longitudinal beam (11) are U-shaped, the cross sections of the first cross beam (8), the second cross beam (7), the third cross beam (6) and the fourth cross beam (4) in the length direction of the fourth cross beam (4) are also U-shaped, and the longitudinal beam reinforcing beam (14) is fixedly installed in the rear longitudinal beam (11) through a plurality of small partition plates (13).
7. A vehicle body lower portion structure for a vehicular body according to claim 1, wherein: and a shock absorber hinge seat is arranged at the side of the third beam connecting plate (12) of the rear longitudinal beam (11).
CN201921196656.XU 2019-07-26 2019-07-26 Underbody structure for a load-bearing vehicle body Active CN210912615U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921196656.XU CN210912615U (en) 2019-07-26 2019-07-26 Underbody structure for a load-bearing vehicle body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921196656.XU CN210912615U (en) 2019-07-26 2019-07-26 Underbody structure for a load-bearing vehicle body

Publications (1)

Publication Number Publication Date
CN210912615U true CN210912615U (en) 2020-07-03

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Family Applications (1)

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Country Status (1)

Country Link
CN (1) CN210912615U (en)

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