CN110509999A - A kind of passenger car lower body structure - Google Patents

A kind of passenger car lower body structure Download PDF

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Publication number
CN110509999A
CN110509999A CN201910950179.XA CN201910950179A CN110509999A CN 110509999 A CN110509999 A CN 110509999A CN 201910950179 A CN201910950179 A CN 201910950179A CN 110509999 A CN110509999 A CN 110509999A
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CN
China
Prior art keywords
stringer
lower body
passenger car
rear portion
auxiliary section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910950179.XA
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Chinese (zh)
Inventor
许建峰
吴传峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Hengrun Automobile Co Ltd
Original Assignee
Hunan Hengrun Automobile Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hunan Hengrun Automobile Co Ltd filed Critical Hunan Hengrun Automobile Co Ltd
Priority to CN201910950179.XA priority Critical patent/CN110509999A/en
Publication of CN110509999A publication Critical patent/CN110509999A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D21/00Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/02Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members

Abstract

Passenger car lower body structure disclosed in the present application, compared with prior art, comprising: integral type stringer arranged in parallel, the integral type stringer include: front stringer, waist longeron, rear portion stringer;The front stringer, the waist longeron, the rear portion stringer are sequentially connected;The front stringer, the waist longeron, the rear portion stringer are an integral molding structure;The front beam being fixedly connected with the front stringer;The rear cross beam being fixedly connected with the rear portion stringer.Passenger car lower body structure provided by the present application enables to lower body design structure simple compared to existing technologies, and bearing strength is high, and overall weight is light, can shorten the development cycle, reduces mold design cost, improves production efficiency.

Description

A kind of passenger car lower body structure
Technical field
This application involves Vehicle Engineering technical fields, more specifically more particularly to a kind of passenger car lower body structure.
Background technique
Passenger car lower body currently on the market generally uses three stage structure, preceding housing assembly, that is, front panel+front longitudinal beam;Before Floor assembly, that is, preceding floor+middle stringer, the i.e. rear floor+floor side member of rear floor assembly, welding again after stringer is welded with three assemblies At lower body assembly, the left-right longeron structure for running through lower body is formed.Since existing market variation requires one Nian little Gai money of vehicle, Three Nian great Gai moneys update for 5 years, and development cost is high again for existing lower body structure, and the period is long, and there is an urgent need to a kind of new Development cost is low and development cycle short problem to meet for type lower body structure.
In passenger car development process, lower body stringer is divided into front longitudinal beam, middle stringer, and floor side member is mainly rushed using plate Molded, segmented is welded to form, and part is more, and structure is complicated, and process is more, and development cost is high, and the development cycle is long.Currently on the market The thinking for solving the problems, such as this is using aluminum alloy extrusion section bar, is equally using three stage structure, only with extruding aluminium profiles Material alleviates white body weight instead of punching press stringer, while reducing mould development cost, but since aluminium is at high cost, In addition the profile squeezed needs to be heat-treated, the production cycle is long, and the body repair complex process of constructed of aluminium, technology not at It is ripe, after-sales service maintenance the high problem of price can not solve always, cause the program that can only be applied in high-end vehicle, in it is low End vehicle can not be used due to cost pressure.
Therefore, how a kind of passenger car lower body structure is provided, enables to lower body design structure simple, carrying is strong Degree is high, and overall weight is light, can shorten the development cycle, reduces mold design cost, improves production efficiency, has become this field Technical staff's technical problem urgently to be resolved.
Summary of the invention
In order to solve the above technical problems, the application provides a kind of passenger car lower body structure, by adding in integral type stringer Upper cross beam welding enables to lower body design structure simple at frame assembly, and bearing strength is high, and overall weight is light, can Shorten the development cycle, reduce mold design cost, improves production efficiency.
Technical solution provided by the present application is as follows:
The application provides a kind of passenger car lower body structure, comprising: integral type stringer arranged in parallel, the one Formula stringer includes: front stringer, waist longeron, rear portion stringer;The front stringer, the waist longeron, the rear portion stringer It is sequentially connected;The front stringer, the waist longeron, the rear portion stringer are an integral molding structure;With the front stringer The front beam being fixedly connected;The rear cross beam being fixedly connected with the rear portion stringer.
Further, in a kind of preferred mode of the present invention, between the front stringer of two integral type stringers Distance is less than the distance between waist longeron.
Further, in a kind of preferred mode of the present invention, the level of the front stringer of two integral type stringers Height is higher than the level height of waist longeron.
Further, in a kind of preferred mode of the present invention, the level of the rear portion stringer of two integral type stringers Height is higher than the level height of waist longeron.
Further, in a kind of preferred mode of the present invention, front beam auxiliary section is provided on the front stringer;Institute The end for stating front beam auxiliary section and front beam connects.
Further, in a kind of preferred mode of the present invention, rear cross beam auxiliary section is provided on the rear portion stringer;Institute The end for stating rear cross beam auxiliary section and rear cross beam connects.
Further, in a kind of preferred mode of the present invention, front beam auxiliary section is provided on the front stringer;Institute The end for stating front beam auxiliary section and front beam connects;
Rear cross beam auxiliary section is provided on the rear portion stringer;The rear cross beam auxiliary section and the end of rear cross beam connect.
Further, in a kind of preferred mode of the present invention, the front beam auxiliary section specifically: setting is vertical in front On beam medial surface, hole is inserted into for being inserted into the cooperation of end of front beam;The rear cross beam auxiliary section specifically: be arranged at rear portion On side rail inner face, hole is inserted into for being inserted into the cooperation of end of rear cross beam.
Further, in a kind of preferred mode of the present invention, the front beam auxiliary section specifically: setting is vertical in front On beam medial surface, for being inserted into the protrusion of front beam end inner hole;The rear cross beam auxiliary section is specially;Setting is vertical at rear portion On beam medial surface, for being inserted into the protrusion of rear cross beam end inner hole.
Further, in a kind of preferred mode of the present invention, the front beam auxiliary section specifically: setting is vertical in front Groove profile mounting structures on beam medial surface, for support front beam end;The rear cross beam auxiliary section is specially;It is arranged at rear portion Groove profile mounting structures on side rail inner face, for support rear cross beam end.
Further, in a kind of preferred mode of the present invention, the integral type stringer is hollow structure, the integral type The section of stringer is rectangle or circle.
Further, in a kind of preferred mode of the present invention, further includes: front panel of the welding on the stringer of front;It spells It is welded in the preceding floor on waist longeron;Rear floor of the welding on the stringer of rear portion.
A kind of passenger car lower body structure provided by the invention, compared with prior art, comprising: arranged in parallel one Body formula stringer, the integral type stringer include: front stringer, waist longeron, rear portion stringer;The front stringer, waist longeron, Rear portion stringer is sequentially connected;The front beam being fixedly connected with the front stringer;The rear cross being fixedly connected with the rear portion stringer Beam.A kind of passenger car lower body structure provided by the invention, through the front stringer in integrally formed integral type stringer with after On portion's stringer, it is fixedly connected with setting front beam and rear cross beam formation globality is strong, the high frame assembly of structural strength, compared to existing For having technology, enable to lower body design structure simple, bearing strength is high, and overall weight is light, can shorten exploitation week Phase reduces mold design cost, improves production efficiency.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of application for those of ordinary skill in the art without creative efforts, can be with It obtains other drawings based on these drawings.
Fig. 1 is the overall structure diagram of passenger car lower body structure provided in an embodiment of the present invention;
Fig. 2 is the main structure figure of integral type stringer provided in an embodiment of the present invention;
Fig. 3 is the top view of integral type stringer provided in an embodiment of the present invention;
Fig. 4 is the top view of passenger car lower body structure provided in an embodiment of the present invention;
Fig. 5 is the whole detailed schematic of passenger car lower body structure provided in an embodiment of the present invention;
Fig. 6 is that pore structure schematic diagram is inserted into the cooperation of passenger car lower body structure provided in an embodiment of the present invention;
Fig. 7 is the protrusion structural schematic diagram of passenger car lower body structure provided in an embodiment of the present invention;
Fig. 8 is the groove profile mounting structures structural schematic diagram of passenger car lower body structure provided in an embodiment of the present invention.
Specific embodiment
In order to make those skilled in the art more fully understand the technical solution in the application, below in conjunction with the application reality The technical scheme in the embodiment of the application is clearly and completely described for the attached drawing for applying in example, it is clear that described embodiment Only a part of the embodiment of the application, instead of all the embodiments.Based on the embodiment in the application, this field is common Technical staff's every other embodiment obtained without making creative work belongs to the model of the application protection It encloses.
It should be noted that it can directly exist when element is referred to as on " being fixed on " or " being set to " another element On another element or indirectly setting on the other element;When an element is known as " being connected to " another element, It can be directly to another element or be indirectly connected on another element.
It is to be appreciated that term " length ", " width ", "upper", under ", "front", "rear", " first ", " second ", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside" is orientation based on the figure or position Relationship is merely for convenience of description the application and simplifies description, rather than the device or element of indication or suggestion meaning must have There is specific orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.It is multiple in the description of the present application ", " several " be meant that two or Two or more, unless otherwise specifically defined.
It should be clear that structure depicted in this specification attached drawing, ratio, size etc., only to cooperate specification revealed Content is not limited to the enforceable qualifications of the application, therefore does not have so that those skilled in the art understands and reads Technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the application institute energy Under the effect of generation and the purpose that can reach, it should all still fall in techniques disclosed in this application content and obtain the range that can cover It is interior.
Please be as shown in Figures 1 to 8, passenger car lower body structure provided by the embodiments of the present application, comprising: arranged in parallel Integral type stringer 1, the integral type stringer 1 includes: front stringer 101, waist longeron 102, rear portion stringer 103;Before described Portion's stringer 101, the waist longeron 102, the rear portion stringer 103 are sequentially connected;The front stringer 101, the middle part are vertical Beam 102, the rear portion stringer 103 are an integral molding structure;The front beam 201 being fixedly connected with the front stringer 101;With institute State the rear cross beam 202 that rear portion stringer 103 is fixedly connected.
The embodiment of the present invention provides a kind of passenger car lower body structure, specifically includes: integral type arranged in parallel is vertical Beam 1, the integral type stringer 1 include: front stringer 101, waist longeron 102, rear portion stringer 103;The front stringer 101, The waist longeron 102, the rear portion stringer 103 are sequentially connected;It is the front stringer 101, the waist longeron 102, described Rear portion stringer 103 is an integral molding structure;The front beam 201 being fixedly connected with the front stringer 101;With the rear portion stringer 103 rear cross beams 202 being fixedly connected.Pass through the front stringer 101 and rear portion stringer 103 in integrally formed integral type stringer 1 On, it is fixedly connected with setting front beam 201 and the formation of rear cross beam 202 globality is strong, the high frame assembly of structural strength, compared to existing For having technology, enable to lower body design structure simple, bearing strength is high, and overall weight is light, can shorten exploitation week Phase reduces mold design cost, saves the production cost of enterprise.
Passenger car lower body structure provided by the present application is first welded into frame assembly plus crossbeam by integral type stringer 1, then It burn-ons front panel, preceding floor, rear floor, is welded into lower body assembly, such lower body structure stress structure is good, and intensity is high, It is light-weight, it is at low cost.
Specifically, in embodiments of the present invention, the distance between front stringer 101 of two integral type stringers 1 is small In the distance between waist longeron 102.
Specifically, in embodiments of the present invention, the level height of the front stringer 101 of two integral type stringers 1 is high In the level height of waist longeron 102.
Specifically, in embodiments of the present invention, the level height of the rear portion stringer 103 of two integral type stringers 1 is high In the level height of waist longeron 102.
It should be noted that the positional relationship of front stringer 101 and rear portion stringer 103 relative to waist longeron 102, meets Demand of the Automobile Design to lower body frame assembly.
Specifically, in embodiments of the present invention, front beam auxiliary section 1011 is provided on the front stringer 101;It is described Front beam auxiliary section 1011 is connect with the end of front beam 201.
Specifically, in embodiments of the present invention, rear cross beam auxiliary section 1031 is provided on the rear portion stringer 103;It is described Rear cross beam auxiliary section 1031 is connect with the end of rear cross beam 202.
Specifically, in embodiments of the present invention, the front beam auxiliary section 1011 specifically: be arranged in front stringer 101 On medial surface, hole 301 is inserted into for being inserted into the cooperation of end of front beam 201;The rear cross beam auxiliary section 1031 specifically: set It sets on 103 medial surface of rear portion stringer, is inserted into hole 301 for being inserted into the cooperation of end of rear cross beam 202.
Specifically, in embodiments of the present invention, the front beam auxiliary section 1011 specifically: be arranged in front stringer 101 On medial surface, for being inserted into the protrusion 302 of 201 end inner hole of front beam;The rear cross beam auxiliary section 1031 is specially;Setting On 103 medial surface of rear portion stringer, for being inserted into the protrusion 302 of 202 end inner hole of rear cross beam.
Specifically, in embodiments of the present invention, the front beam auxiliary section 1011 specifically: be arranged in front stringer 101 Groove profile mounting structures 303 on medial surface, for 201 end of support front beam;The rear cross beam auxiliary section 1031 is specially;If It sets on 103 medial surface of rear portion stringer, the groove profile mounting structures 303 for 202 end of support rear cross beam.
It should be noted that front beam auxiliary section 1011 and rear cross beam auxiliary section 1031 enable to crossbeam and integral type Stringer 1 connects more convenient, to position in the reduction welding process time, so that front beam or rear cross beam can rapidly be determined Position is welded on the medial surface of front stringer or rear portion stringer.
Specifically, in embodiments of the present invention, the integral type stringer 1 is hollow structure, and the integral type stringer 1 is cut Face is rectangle or circle.
Specifically, in embodiments of the present invention, further includes: front panel of the welding on front stringer 101;Welding is at middle part Preceding floor 4 on stringer 102;Rear floor 5 of the welding on rear portion stringer 103.
More specifically illustrate, the present embodiments relate to industry relational language explanation are as follows:
Lower body: passenger car floor panel structure provides the body construction of support for the installation of the parts such as chassis;
Stringer: the underfloor beam-shaped structural part of body construction is vehicle body main stress part;
Vehicle frame: the vehicle body H-type main stress frame structure being made of beam-like part is common in chassis frame and body construction.
The shortcomings that prior art is further illustrated:
1, lower body stringer use punch forming, three stage structure, part is more, and structure is complicated, and stringer all use it is high-strength Steel is spent, resilience is big, and matching is difficult;
2, stringer weight is big, is unsatisfactory for light-weight design requirement;
3, mould development is costly, and butt welding clamp type is more, and structure is complicated, and overall cost is high;
4, the development cycle is long, is unable to satisfy requirement of the market to new car model development cycle time.
The purpose of the present invention is further illustrated:
1, changing three-stage is integral type stringer, simplifies lower body longitudinal beam structure, reduces number of parts, reduces cost;
2, punching type stringer is changed to rectangular tube brake forming, reduces mould development expense, reduce the development cycle;
3, rectangular tube structural section selects high strength steel, and intensity is high, and weight is low.
Compared with prior art, advantage is as follows:
1, the molding stringer of integral type three-dimensional bending is simpler than traditional punching type, three-stage longitudinal beam structure, light-weight, by force It spends;
2, it is long to solve conventional ram-type, three-stage stringer development cycle, the high problem of development cost;
3, frame assembly and front panel, preceding floor, rear floor welding made of lower body structure type, combine non-hold Load formula structure bus body strength height and the light-weight advantage of monocoque construction can effectively improve the intensity and just of vehicle Degree.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one The widest scope of cause.

Claims (10)

1. a kind of passenger car lower body structure characterized by comprising
Integral type stringer arranged in parallel, the integral type stringer include: front stringer, waist longeron, rear portion stringer;Institute Front stringer, the waist longeron, the rear portion stringer is stated to be sequentially connected;The front stringer, the waist longeron, it is described after Portion's stringer is an integral molding structure;
The front beam being fixedly connected with the front stringer;
The rear cross beam being fixedly connected with the rear portion stringer.
2. passenger car lower body structure according to claim 1, which is characterized in that the front of two integral type stringers The distance between stringer is less than the distance between waist longeron.
3. passenger car lower body structure according to claim 2, which is characterized in that the front of two integral type stringers The level height of stringer is higher than the level height of waist longeron.
4. passenger car lower body structure according to claim 2, which is characterized in that the rear portion of two integral type stringers The level height of stringer is higher than the level height of waist longeron.
5. passenger car lower body structure according to any one of claims 1 to 4, which is characterized in that on the front stringer It is provided with front beam auxiliary section;The front beam auxiliary section and the end of front beam connect;
Rear cross beam auxiliary section is provided on the rear portion stringer;The rear cross beam auxiliary section and the end of rear cross beam connect.
6. passenger car lower body structure according to claim 5, which is characterized in that the front beam auxiliary section specifically: It is arranged on the side rail inner face of front, is inserted into hole for being inserted into the cooperation of end of front beam;The rear cross beam auxiliary section is specific Are as follows: it is arranged on the side rail inner face of rear portion, is inserted into hole for being inserted into the cooperation of end of rear cross beam.
7. passenger car lower body structure according to claim 5, which is characterized in that the front beam auxiliary section specifically: It is arranged on the side rail inner face of front, for being inserted into the protrusion of front beam end inner hole;The rear cross beam auxiliary section is specially; It is arranged on the side rail inner face of rear portion, for being inserted into the protrusion of rear cross beam end inner hole.
8. passenger car lower body structure according to claim 5, which is characterized in that the front beam auxiliary section specifically: Groove profile mounting structures on the side rail inner face of front, for support front beam end are set;The rear cross beam auxiliary section is specific For;Groove profile mounting structures on the side rail inner face of rear portion, for support rear cross beam end are set.
9. according to the described in any item passenger car lower body structures of claim 6 to 8, which is characterized in that the integral type stringer For hollow structure, the section of the integral type stringer is rectangle or circle.
10. passenger car lower body structure according to claim 9, which is characterized in that further include: welding is on the stringer of front Front panel;Preceding floor of the welding on waist longeron;Rear floor of the welding on the stringer of rear portion.
CN201910950179.XA 2019-10-08 2019-10-08 A kind of passenger car lower body structure Pending CN110509999A (en)

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