CN104494701A - An Integral Stressed Passenger Car Chassis Basic Structure - Google Patents

Abstract

The invention relates to the technical field of passenger cars, in particular to an integrally stressed passenger car chassis foundation structure which comprises two longitudinal girders and a plurality of cross beams, wherein the cross beams are distributed on different height layers and different longitudinal positions of the two longitudinal girders, and the cross beams are in tenon joint with the two longitudinal girders to form an integrally stressed double-longitudinal-beam multilayer chassis frame; the front part of the double-longitudinal-beam multilayer chassis frame is connected with a front bridge, and the front bridge is fixed through two longitudinal beams; the rear part of the double-longitudinal-beam multilayer chassis frame is connected with a rear bridge; the rear bridge frame is fixed through two longitudinal girders; the double-longitudinal-beam multilayer chassis frame is simple in structure, good in overall structure rigidity, simple in forming process and assembling process, the front bridge frame, the rear bridge frame and the double-longitudinal-beam multilayer chassis frame are fully positioned and firmly connected, overall stress is achieved, the wheelbase and the wheelbase can be freely adjusted, and design of a series of automobile chassis is facilitated.

Description

An Integral Stressed Passenger Car Chassis Basic Structure

technical field

The invention relates to the technical field of automobiles, in particular to an overall stressed passenger car chassis basic structure.

Background technique

Whether it is a traditional car or a new energy vehicle, the lightweight of the body has become a research hotspot, especially for electric vehicles, the significance of lightweight is greater, and the requirements for lightweight are higher. In order to achieve a significant lightweight effect, it is necessary to find new solutions in terms of materials, structures and manufacturing processes.

The existing passenger car structure is divided into load-bearing body structure and non-load-bearing body structure. The chassis structure of the former is composed of a series of space truss structures. The space between the trusses is used to store luggage. The body structure is continuously welded on the chassis structure to form The more space is used for the passenger area, the weight of this overall force-bearing body is lighter, but the position of the passenger area is higher, and the height of the vehicle increases accordingly. This body structure is mainly used for tourist buses. The chassis structure of the latter is mainly composed of double longitudinal beams. A series of installation points are arranged on the longitudinal beams to install chassis components and carriages. Therefore, the two longitudinal beams are not only the installation base parts, but also the main force-bearing structural parts. The body The structure is mainly used for buses, but the chassis structure has the following major defects: 1. The weight is large and heavy; 2. The space shape of the longitudinal beam is complex and difficult to form; 3. The position of the hard point on the longitudinal beam is fixed. Lack of adjustability makes it difficult to support the development of serialized products.

Contents of the invention

The object of the present invention is to provide a kind of overall stressed passenger car chassis base structure for the deficiency of prior art, it not only synthesized the advantages of integral stressed body structure and double longitudinal beam body structure, but also effectively avoids its shortcoming, in guaranteeing While the overall structural rigidity is excellent, it greatly reduces weight and simplifies the molding process and assembly process. It can not only effectively install the chassis system, but also flexibly adjust the wheelbase and wheelbase, and support serialized chassis development.

In order to achieve the above object, an integrally stressed passenger car chassis foundation structure of the present invention comprises two longitudinal girders and several cross beams, the several cross girders are distributed at different height levels and different longitudinal positions of the two longitudinal girders, and the several cross girders are tenon-jointed on the Two longitudinal girders form a double-longitudinal multi-layer chassis frame under overall stress; the front part of the double-longeron multi-layer chassis frame is connected with a front bridge, and the front bridge is fixed by two longitudinal girders; the double longitudinal The rear part of the beam multi-layer chassis frame is connected with a rear bridge; the rear bridge is fixed by two longitudinal girders.

As a preference, the whole of the front bridge is U-shaped, and the inner sides of the two vertical ends of the U-shaped front bridge are fitted and fixed to the outer sides of the longitudinal girder;

A connecting rod is inserted inside the longitudinal girder, one end of the connecting rod is fixedly connected to the longitudinal girder, and the other end of the connecting rod is fixedly connected to the U-shaped front bridge.

Preferably, the rear bridge frame includes a front hanging beam, a rear hanging beam, a front lug seat and a rear hanging lug seat, the front hanging beam and the rear hanging beam are respectively mortized to the longitudinal girder, the front hanging lug seat, the rear hanging The lug seats are correspondingly fixed on the front cantilever beam and the rear cantilever beam.

Preferably, the number of the front cantilever beams and the rear cantilever beams is two, the two front cantilever beams are distributed horizontally or vertically, the two rear cantilever beams are distributed horizontally or vertically, and the two front cantilever beams are distributed horizontally or vertically. A front span beam is connected between the two rear cantilever beams, and a rear span beam is connected between the two rear cantilever beams. The front lug seat and the rear lug seat are correspondingly arranged on the front span beam and the rear span beam.

Preferably, the number of the front cantilever beams and the rear cantilever beams is four respectively, and the four front cantilever beams and the four rear cantilever beams are respectively distributed in a square shape, and the front span beams are connected between the adjacent two front cantilever beams. A rear span beam is connected between two adjacent rear cantilever beams, and the front lug seat and the rear lug seat are correspondingly arranged on the front span beam and the rear span beam.

Preferably, the cross-section of the longitudinal girder is inverted L-shaped or T-shaped, and the plurality of cross-beams are respectively horizontally mortised on the upper and lower layers of the inverted L-shaped longitudinal girder or the T-shaped longitudinal girder to form a two-layer floor chassis shelf.

Preferably, the cross-section of the longitudinal girder is I-shaped, and the plurality of cross-beams are respectively horizontally tenon-jointed with the upper and lower layers of the I-shaped longitudinal girder to form a two-layer floor chassis frame.

Preferably, the cross-section of the longitudinal girder is font, the several beams are horizontally mortised on the The upper and lower layers of the font-shaped longitudinal girder form a two-layer floor chassis frame.

Preferably, both the longitudinal girder and the cross beam are aluminum alloy profile beams; several sub-cavities are arranged in the cross-section of the longitudinal girder, and the sub-cavities form a mortise-joint geometric relationship with the cross beam.

Preferably, both the longitudinal girder and the cross girder are steel girders with a rectangular cross-section.

Beneficial effects of the present invention: an integrally stressed passenger car chassis foundation structure of the present invention includes two longitudinal girders and several cross beams, the several cross girders are distributed at different height levels and different longitudinal positions of the two longitudinal girders, and the several cross girders are tenon-jointed The double-longitudinal multi-layer chassis frame is formed by the two longitudinal beams as a whole, and the double-longitudinal multi-layer chassis frame is formed through the mortise joint between the longitudinal beam and the cross beam, so that the front and rear bridges are respectively fixed by the two longitudinal beams; it is both It combines the advantages of the overall force-bearing body structure and the double longitudinal beam body structure, and effectively avoids its shortcomings. While ensuring the rigidity of the overall structure, it greatly reduces the weight, simplifies the molding process and assembly process, and can be installed effectively. The chassis system can also flexibly adjust the wheelbase and wheelbase, supporting serialized chassis development.

Description of drawings

FIG. 1 is a schematic perspective view of the three-dimensional structure of Embodiment 1 of the present invention.

Fig. 2 is a schematic diagram of the connection between the front bridge and the longitudinal girder according to Embodiment 1 of the present invention.

Fig. 3 is a schematic diagram of the connection between the rear bridge and the longitudinal girder according to Embodiment 1 of the present invention.

Fig. 4 is a schematic diagram of the connection between the rear bridge and the longitudinal girder according to the second embodiment of the present invention.

Fig. 5 is a schematic diagram of the connection between the rear bridge and the longitudinal girder according to the third embodiment of the present invention.

Fig. 6 is a three-dimensional schematic diagram of the connection between the rear bridge frame and the longitudinal girder according to the third embodiment of the present invention.

FIG. 7 is a partially enlarged schematic diagram of point A in FIG. 1 .

Reference signs include:

1—Longitudinal girder 11—Beam 12—Sub-cavity

2—Double longitudinal beam multi-layer chassis frame 3—Front bridge frame 31—Vertical end

32—connecting rod 4—rear bridge 41—front beam

42—Rear cantilever 43—Front mounting ear seat 44—Rear mounting ear seat

45—front span beam 46—rear span beam.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

Embodiment one.

As shown in Fig. 1 to Fig. 3 and Fig. 7, an integrally stressed passenger car chassis foundation structure of the present invention includes two longitudinal girders 1 and several cross beams 11, and several cross girders 11 are distributed at different heights of the two longitudinal girders 1 At different levels and at different longitudinal positions, a number of beams 11 are tenon-jointed to two longitudinal girders 1 to form an integrally stressed double-longitudinal multi-layer chassis frame 2; the front part of the double-longeron multi-layer chassis frame 2 is connected to a front bridge frame 3, The front bridge frame 3 is fixed by two longitudinal girders 1 ; the rear bridge frame 4 is connected to the rear of the double longitudinal girder multi-layer chassis frame 2 ; the rear bridge frame 4 is fixed by two longitudinal girders 1 . The double-longitudinal multi-layer chassis frame 2 is formed by mortise jointing of the longitudinal girder 1 and the cross girder 11, so that the front and rear bridge frames 4 are respectively fixed by two longitudinal girders 1; it not only integrates the overall stressed body structure and the double-girder body The advantages of the structure and its disadvantages are effectively avoided. While ensuring the excellent rigidity of the overall structure, it greatly reduces the weight, simplifies the molding process and assembly process, and can not only effectively install the chassis system, but also flexibly adjust the wheelbase and wheelbase. , support serialized chassis development.

As a preference, the whole of the front bridge frame 3 is U-shaped, and the inner surfaces of the two vertical ends 31 of the U-shaped front bridge frame 3 are fitted and fixed with the outer surfaces of the longitudinal girder 1; Connecting insertion rod 32 , one end of the connecting insertion rod 32 is fixedly connected to the longitudinal beam 1 , and the other end of the connecting insertion rod 32 is fixedly connected to the U-shaped front bridge frame 3 . The front bridge frame 3 adopts a U-shaped structure, which has a simple structure and high connection strength. The inner surfaces of the two vertical ends 31 are attached and fixed to the outer surfaces of the longitudinal girder 1 . Specifically, a steel plate is welded on the inner surface of the front bridge frame 3, and the longitudinal girder 1 is fixedly connected to the steel plate of the front bridge frame 3 through another steel plate. The connecting rod 32 of this embodiment can be a steel pipe, one end of the steel pipe connected to the longitudinal girder 1 is connected with a bolt, and one end of the steel pipe connected to the front bridge frame 3 is welded to realize the firm connection between the front bridge frame 3 and the longitudinal girder 1.

The rear bridge frame 4 of this embodiment includes a front hanging beam 41, a rear hanging beam 42, a front lug seat 43 and a rear hanging lug seat 44, and the front hanging beam 41 and the rear hanging beam 42 are respectively mortised and jointed to the longitudinal girder 1. The front lug seat 43 and the rear lug seat 44 are correspondingly fixed to the front cantilever beam 41 and the rear cantilever beam 42 . When the front cantilever 41 and the rear cantilever 42 have sufficient strength, the rear bridge frame 4 of this embodiment can adopt a single front cantilever 41 and a single rear cantilever 42 . The front hanging beam 41 and the rear hanging beam 42 can be flexibly tenoned at different positions of the longitudinal girder 1, and the front hanging lug seat 43 and the rear hanging lug seat 44 are correspondingly fixed on the front hanging beam 41 and the rear hanging beam 42, so that the front hanging lug seat 43. The distance between the rear lug seats 44 can be flexibly adjusted, the installation is convenient and fast, and the adjustments to meet the needs of different wheelbases are possible.

The cross section of the longitudinal girder 1 of this embodiment can be inverted L-shaped, T-shaped, I-shaped or Fonts and other cross-sectional shapes. When the cross-section of the longitudinal girder 1 can be inverted L-shaped, the plurality of cross beams 11 are respectively horizontally mortised and mortised on the upper and lower layers of the inverted L-shaped longitudinal girder 1 to form a two-layer floor chassis frame. The inverted L-shaped longitudinal beam 1 can have two positioning surfaces, one is a positioning surface formed by horizontal mortise joints, and the other is a positioning surface formed by vertical mortise joints. The connection and positioning of the bridge frame 3 and the rear bridge frame 4 form a two-layer floor chassis frame.

When the cross section of the longitudinal girder 1 is T-shaped, the plurality of cross beams 11 are respectively horizontally mortised and tenoned on the upper and lower layers of the T-shaped longitudinal girder 1 to form a two-layer floor chassis frame. Designing the longitudinal girder 1 as a T-shape and increasing the positioning surface of the longitudinal girder 1 not only satisfies the positioning of the front bridge frame 3 and rear bridge frame 4, but also makes the vehicle chassis form a three-layer chassis structure. At the same time, the space for the battery and the motor are designed. Make full use of the chassis space. The T-shaped longitudinal girder 1 can be integrally stretched and formed, or can be formed by clamping and inserting girders at the corners of the longitudinal girder 1 . The inner surface of the front bridge frame 3 is welded with steel plates, the two sides of the steel plates extend out of the front bridge frame 3, and a right-angle steel frame is connected between the steel plates of the front bridge frame 3 of the longitudinal girder 1, and the right angle surface of the right-angle steel frame and the longitudinal The girder 1 is connected, and the other right-angle surface of the right-angle steel frame is connected with the steel plate, so as to realize the firm connection between the front bridge frame 3 and the longitudinal girder 1.

When the cross-section of the longitudinal girder 1 is I-shaped, the plurality of cross-beams 11 are horizontally tenon-jointed with the upper and lower layers of the I-shaped longitudinal girder 1 to form a two-layer floor chassis frame. The upper and lower horizontal mortise-jointed beams of the I-shaped longitudinal girder 1 have wider clamping surfaces, and have better positioning for the beam 11 mortise-jointed therein, so that the connection strength of the two-layer floor chassis frame is higher. The I-shaped longitudinal girder 1 not only satisfies the positioning of the front bridge frame 3 and the rear bridge frame 4, but also enables the vehicle chassis to form a three-layer chassis structure. At the same time, battery space and motor space are designed to make full use of the chassis space.

When the cross-section of the longitudinal girder 1 is font, said several beams 11 are horizontally mortised on the The upper and lower layers of the font longitudinal girder 1 form a two-layer floor chassis frame. Should The upper and lower layers of the font-shaped longitudinal girder 1 also have a wider clamping surface, which has better positioning for the beam 11 jointed in it, so that the connection strength of the two-layer floor chassis frame is higher, and the structural strength of the chassis is satisfied. . Should The font-shaped longitudinal girder 1 not only satisfies the positioning of the front bridge frame 3 and the rear bridge frame 4, but also enables the vehicle chassis to form a three-layer chassis structure. At the same time, battery space and motor space are designed to make full use of the chassis space.

As a preference, the longitudinal girder 1 and the cross beam 11 of this embodiment are both aluminum alloy profile beams; several sub-cavities 12 are arranged in the cross-section of the longitudinal girder 1, and the sub-cavities 12 and the cross beam 11 form a mortise-jointed geometry. relation. A sub-cavity 12 is arranged inside the longitudinal girder 1 of stretched aluminum profile. The sub-cavity 12 becomes the clamping surface and positioning surface of the tenon joint of the aluminum alloy beam 11, so that the tenon joint of the aluminum profile is firm.

The longitudinal girder 1 and crossbeam 11 of the bus chassis of the present invention can also be made of steel beams with rectangular cross-sections or other materials, and can also realize the mortise joint installation of the bus chassis to meet the load-bearing strength of the bus chassis and the installation and fixation of other automobile assemblies. .

Embodiment two.

As shown in Figure 4, the difference between this embodiment and Embodiment 1 is that the number of the front cantilever beams 41 and the rear cantilever beams 42 is two, and the two front cantilever beams 41 are distributed horizontally or vertically. , the two rear cantilever beams 42 are distributed horizontally or vertically, a front span beam 45 is connected between the two front cantilever beams 41, and a rear span beam 46 is connected between the two rear cantilever beams 42. The seat 43 and the rear lug seat 44 are correspondingly arranged on the front span beam 45 and the rear span beam 46 respectively. Adopting the rear bridge frame 4 of a plurality of front cantilever beams 41 and rear cantilever beams 42 structures can further improve the connection strength of the rear bridge frame 4, and provide high-strength support points for the installation of the rear bridge assembly. The front span beam 45 and the rear span beam 46 can share the force of the front lug seat 43 and the rear lug seat 44, and transmit it to the front cantilever beam 41 and the rear cantilever beam 42 respectively, so that the structural stress strength of the bus chassis is better.

The rest of this embodiment is the same as the first embodiment, and will not be repeated here.

Embodiment three.

As shown in Figures 5 to 6, the difference between this embodiment and the second embodiment is that the number of the front cantilever beams 41 and the rear cantilever beams 42 is four respectively, and the four front cantilever beams 41 and the four rear cantilever beams 42 Each is distributed in the shape of a mouth, and a front span beam 45 is connected between two adjacent front cantilever beams 41, and a rear span beam 46 is connected between adjacent two rear cantilever beams 42. The front hanging ear seats 43 and the rear lug seat 44 are correspondingly arranged on the front span beam 45 and the rear span beam 46 respectively. Further, this embodiment adopts the structure of the front cantilever beam 41 and the rear cantilever beam 42 structure in the shape of a square, and further improves the connection strength of the rear bridge frame 4 on the basis of the second embodiment, so as to provide a high-strength support for the installation of the rear axle assembly. The supporting points, the front span beam 45 and the rear span beam 46 can share the force of the front lug seat 43 and the rear lug seat 44, and transmit it to the front cantilever beam 41 and the rear cantilever beam 42, so that the structural stress strength of the bus chassis better.

The rest of this embodiment is the same as the second embodiment, and will not be repeated here.

The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. limits.

Claims (10)

1. An integrally stressed passenger car chassis foundation structure is characterized in that: it comprises two longitudinal girders and some cross beams, and some cross girders are distributed on different height layers and different longitudinal positions of the two longitudinal girders, and some cross girders are tenon-jointed on the two longitudinal girders. Longitudinal girders form a multi-layer chassis frame with double longitudinal girders under overall stress; The front part of the double-longitudinal multi-layer chassis frame is connected with a front bridge, and the front bridge is fixed by two longitudinal girders; A rear bridge is connected to the rear of the double longitudinal beam multi-layer chassis frame; the rear bridge is fixed by two longitudinal girders. 2. A kind of integrally stressed passenger car chassis basic structure according to claim 1, characterized in that: the whole of the front bridge frame is U-shaped, and the inner sides of the two vertical ends of the U-shaped front bridge frame are all connected to the longitudinal girder The outer side of the body is fitted and fixed; A connecting rod is inserted inside the longitudinal girder, one end of the connecting rod is fixedly connected to the longitudinal girder, and the other end of the connecting rod is fixedly connected to the U-shaped front bridge. 3. The basic structure of an integrally stressed passenger car chassis according to claim 1, wherein the rear bridge frame includes a front hanging beam, a rear hanging beam, a front lug seat and a rear lug seat, and the front The cantilever beam and the rear cantilever beam are respectively mortised and jointed to the longitudinal girder, and the front lug seat and the rear lug seat are correspondingly fixed to the front cantilever beam and the rear cantilever beam. 4. The overall stressed passenger car chassis foundation structure according to claim 3, characterized in that: the number of the front cantilever beams and the rear cantilever beams is two, and the two front cantilever beams are distributed horizontally or vertically. The two rear cantilever beams are distributed horizontally or vertically, the front span beam is connected between the two front cantilever beams, and the rear span beam is connected between the two rear cantilever beams. The lug seats are correspondingly arranged on the front span beam and the rear span beam respectively. 5. A kind of overall stressed bus chassis foundation structure according to claim 3, characterized in that: the number of the front cantilever beams and the rear cantilever beams is four respectively, and the four front cantilever beams and the four rear cantilever beams are each in the form of It is distributed in the shape of a mouth. The front span beam is connected between the adjacent two front cantilever beams, and the rear span beam is connected between the adjacent two rear cantilever beams. The front lug seats and the rear lug seats correspond to It is arranged on the front span beam and the rear span beam. 6. The overall stressed bus chassis foundation structure according to claim 1, characterized in that: the cross-section of the longitudinal girder is inverted L-shaped or T-shaped, and the plurality of cross-beams are horizontally mortised on the inverted The upper and lower layers of the L-shaped longitudinal girder or the T-shaped longitudinal girder form a two-layer floor chassis frame. 7. The overall stressed bus chassis foundation structure according to claim 1, characterized in that: the cross-section of the longitudinal girder is I-shaped, and the plurality of cross-beams are respectively horizontally tenon-jointed to the I-shaped longitudinal girder The upper and lower layers of the floor form a two-layer floor chassis frame. 8. The overall stressed passenger car chassis foundation structure according to claim 1, characterized in that: the cross section of the longitudinal girder is font, the several beams are horizontally mortised on the The upper and lower layers of the font-shaped longitudinal girder form a two-layer floor chassis frame. 9. According to any one of claims 1 to 8, an integrally stressed passenger car chassis foundation structure is characterized in that: the longitudinal girder and the cross beam are both aluminum alloy profile beams; the cross-section of the longitudinal girder Several sub-cavities are arranged, and the sub-cavities form a mortise-joint geometric relationship with the beam. 10. An overall stressed passenger car chassis foundation structure according to any one of claims 1 to 5, characterized in that: the longitudinal girders and cross girders are steel girders with rectangular cross-sections.