CN110979460B - Rear frame platform of light bus - Google Patents

Abstract

The invention discloses a rear frame platform of a light bus, which comprises a rear frame assembly and a rear floor, wherein the rear frame assembly is formed by welding a first longitudinal beam assembly, a second longitudinal beam assembly, a side skirt plate assembly, a middle cross beam and a tail cross beam; the first longitudinal beam assembly and the second longitudinal beam assembly are respectively composed of a longitudinal beam and a longitudinal beam upper plate; the first bridging piece and the second bridging piece are welded on two sides of the first longitudinal beam assembly and the second longitudinal beam assembly along the axial direction; the middle cross beam is lapped on the lapping surface of the first lapping piece; the side skirt assembly includes a front skirt and a rear skirt overlapped on an overlapped surface of the second overlapped piece; the tail cross beam is connected with the rear skirt plate, the first longitudinal beam assembly and the second longitudinal beam assembly. The rear frame platform of the light bus is simple in structure, low in manufacturing cost, good in interchangeability and universality of parts, capable of easily realizing the modification work of platform expansion, and capable of forming a frame structure of a series and platform product.

Description

A light passenger car rear frame platform

Technical Field

The invention relates to the technical field of automobile parts processing, and more specifically to a rear frame platform of a light passenger car.

Background Art

In the past, the rear frames of light buses were generally made of complex and special-shaped stamped structural parts that were welded together. The parts had complex structures and many types, and multiple sets of molds needed to be developed, which resulted in high development costs. In addition, the parts had poor interchangeability and versatility, making modifications difficult. It was difficult to platformize and serialize the products, and the cost of developing new products was high.

Therefore, in order to solve the above technical problems, there is an urgent need for a platform-based light passenger car rear frame structure on the market.

Summary of the invention

To this end, the purpose of the present invention is to provide a light passenger car rear frame platform, and its specific technical solution is as follows:

A rear frame platform of a light passenger car comprises a rear frame assembly and a rear floor overlapped on the rear frame assembly, wherein the rear frame assembly is welded by a first longitudinal beam assembly, a second longitudinal beam assembly, a side skirt assembly, an intermediate cross beam, and a tail cross beam;

The first longitudinal beam assembly and the second longitudinal beam assembly are arranged in parallel on both sides of the rear frame assembly, and each of them is composed of a longitudinal beam and a longitudinal beam upper plate, and the longitudinal beam and the longitudinal beam upper plate are welded to form a closed cavity; the first longitudinal beam assembly and the second longitudinal beam assembly are welded with a plurality of lap joints on both sides along the axial direction thereof, wherein the lap joints on the two opposite sides of the first longitudinal beam assembly and the second longitudinal beam assembly are the same in number and in corresponding positions, and are first lap joints; the lap joints on the two opposite sides of the first longitudinal beam assembly and the second longitudinal beam assembly are the same in number and in corresponding positions, and are second lap joints;

The intermediate cross beams are provided in plurality and the two ends thereof are overlapped on the overlapped surface of the first overlapped member, and the intermediate cross beams are perpendicular to the first longitudinal beam assembly and the second longitudinal beam assembly;

The side skirt assembly is arranged on opposite sides of the first longitudinal beam assembly and the second longitudinal beam assembly, and includes a front side skirt and a rear side skirt, the front side skirt and the rear side skirt are welded to a side skirt bracket, and the side skirt bracket is overlapped on the overlap surface of the second overlap member;

The tail cross beam is connected to the rear skirt plate via two corner connectors, the tail ends of the first longitudinal beam assembly and the second longitudinal beam assembly are correspondingly welded with third lap joints, and the tail cross beam is overlapped on the overlapped surface of the third lap joints;

The size of the cavity formed by the longitudinal beam and the upper plate of the longitudinal beam is designed in series according to the actual needs of the bus; the middle cross beam, the front skirt panel, the rear skirt panel, the tail cross beam, the first lap joint, the second lap joint, the third lap joint, the side skirt panel bracket, and the corner connector are all serialized standard parts.

The above-mentioned light bus rear frame platform provided by the present invention has a simple structure, low manufacturing cost, good component interchangeability and versatility, can easily realize platform expansion modification work, and can form a frame structure of serialized and platformized products.

On the basis of the above technical solution, the present invention can also make the following improvements:

Preferably, the middle cross beam is divided into a high-section cross beam and a low-section cross beam according to the height of the cross section, and the high-section cross beam and the low-section cross beam are selected and arranged according to the actual strength requirement of the rear frame platform.

Since the high-section cross beam is made of more metal raw materials, it has better strength and rigidity than the low-section cross beam, which can ensure that the rear frame platform of the light bus has a good load-bearing effect. However, if all the middle cross beams are designed to be high-section cross beams, the manufacturing cost of the rear frame platform of the light bus will be greatly increased, and its own weight will be increased, thereby affecting the economy and actual use effect of the whole vehicle. Therefore, the present invention will reasonably select and arrange the high-section cross beams and the low-section cross beams according to the actual strength requirements of the rear frame platform.

Preferably, the first joint piece is divided into a high-section joint piece and a low-section joint piece according to the height of the cross section, and the high-section joint piece and the low-section joint piece are selected and arranged according to the structure of the middle crossbeam to be overlapped.

Preferably, the second lap joint and the third lap joint are selected to use the high-section lap joint.

Because the front skirt panel, the rear skirt panel and the tail cross beam need to be firmly fixed to the first longitudinal beam assembly and the second longitudinal beam assembly, the present invention selects the lap joint as a high-section lap joint to ensure the strength of the connection.

Preferably, a plurality of long grooves are longitudinally distributed in the middle portion of the rear floor, and the long grooves can increase the rigidity of the middle portion of the rear floor.

Preferably, the periphery of the rear floor is designed to be flat.

Preferably, the plane formed by overlapping the rear floor and the rear frame assembly is parallel to the horizontal plane of the bottom of the bus.

Compared with the prior art, the rear frame platform structure of a light passenger car of the present invention greatly reduces the types of lap parts and reduces the manufacturing cost by realizing the standardization and serialization of the first longitudinal beam assembly, the second longitudinal beam assembly, the side skirt assembly, the middle cross beam, the tail cross beam and the corresponding connecting parts. Moreover, the length adjustment of the middle cross beam and the first longitudinal beam assembly and the second longitudinal beam assembly can be achieved by adjusting the blanking length on the standard mold, which can facilitate the adjustment of the width and length of the vehicle body, easily realize the platformization and serialization of the frame products, and reduce the development cost of new models.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

Figure 1 is a schematic diagram of the assembly of the present invention.

FIG. 2 is a simplified schematic diagram of the rear floor and rear frame assembly of the present invention.

FIG. 3 is an exploded view of the present invention.

Among them, in the figure,

1-rear floor, 101-long groove, 2-longitudinal beam, 3-longitudinal beam upper plate, 4-first lap joint, 401-high-section lap joint, 402-low-section lap joint, 5-second lap joint, 6-middle cross beam, 601-high-section cross beam, 602-low-section cross beam, 7-front side skirt, 8-rear side skirt, 9-side skirt bracket, 10-tail cross beam, 11-corner connector, 12-third lap joint.

DETAILED DESCRIPTION

Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

Example:

A rear frame platform of a light passenger vehicle according to an embodiment of the present invention is described in detail below with reference to FIGS. 1-3 .

As shown in FIG1 , an embodiment of the present invention discloses a rear frame platform of a light bus, including a rear frame assembly and a rear floor 1 overlapped on the rear frame assembly, wherein the plane formed by overlapping the rear floor 1 and the rear frame assembly is parallel to the horizontal plane of the bottom of the bus.

As shown in FIG. 2 , a plurality of long grooves 101 are longitudinally distributed in the middle of the rear floor 1 , and the periphery of the rear floor 1 is designed to be flat.

As shown in FIG3 , the rear frame assembly is welded by a first longitudinal beam assembly, a second longitudinal beam assembly, a side skirt assembly, an intermediate cross beam 6, and a tail cross beam 10. Specifically,

The first longitudinal beam assembly and the second longitudinal beam assembly are arranged in parallel on both sides of the rear frame assembly, and each of them is composed of a longitudinal beam 2 and a longitudinal beam upper plate 3. The longitudinal beam 2 and the longitudinal beam upper plate 3 are welded by resistance welding to form a closed cavity, and the size of the cavity is designed in series according to the actual needs of the bus.

The first longitudinal beam assembly and the second longitudinal beam assembly are both welded with a plurality of lap joints on both sides along the axial direction thereof by resistance welding, wherein the lap joints on the two opposite sides of the first longitudinal beam assembly and the second longitudinal beam assembly are the same in number and have corresponding positions, which are the first lap joints 4; the lap joints on the two opposite sides of the first longitudinal beam assembly and the second longitudinal beam assembly are the same in number and have corresponding positions, which are the second lap joints 5.

There are a plurality of intermediate cross beams 6, and both ends of the intermediate cross beams 6 are overlapped on the overlapped surface of the first overlapped member 4 by resistance welding. The intermediate cross beams 6 are perpendicular to the first longitudinal beam assembly and the second longitudinal beam assembly.

The side skirt assembly is arranged on the opposite sides of the first longitudinal beam assembly and the second longitudinal beam assembly, and includes a front skirt panel 7 and a rear skirt panel 8. The front skirt panel 7 and the rear skirt panel 8 are welded to the side skirt panel bracket 9 by resistance welding, and the side skirt panel bracket 9 is overlapped on the overlapping surface of the second overlap member 5 by resistance welding.

The tail cross beam 10 is connected to the rear skirt 8 by resistance welding through two corner connectors 11. The tail ends of the first longitudinal beam assembly and the second longitudinal beam assembly are correspondingly welded with a third lap joint 12 by resistance welding. The tail cross beam 10 is overlapped on the overlap surface of the third lap joint 12 by resistance welding.

The above-mentioned middle cross beam 6, front skirt panel 7, rear skirt panel 8, tail cross beam 10, first lap joint 4, second lap joint 5, third lap joint 12, side skirt panel bracket 9 and corner connector 11 are all serialized standard parts.

In order to further optimize the technical solution of the above embodiment, the middle cross beam 6 is divided into a high cross-section cross beam 601 and a low cross-section cross beam 602 according to the height of the cross section. The high cross-section cross beam 601 and the low cross-section cross beam 602 are selected and arranged according to the actual strength requirements of the rear frame platform. As shown in FIG3 , the middle cross beam 6 in this embodiment is designed from left to right as a high cross-section cross beam 601, a low cross-section cross beam 602, a low cross-section cross beam 602, a high cross-section cross beam 601, a low cross-section cross beam 602, and a high cross-section cross beam 601.

In order to further optimize the technical solution of the above embodiment, in order to cooperate with the above-mentioned middle cross beam 6, the first joint member 4 is also divided into a high-section joint member 401 and a low-section joint member 402 according to the height of the cross section, that is, the high-section joint member 401 and the low-section joint member 402 are selected and arranged according to the structure of the middle cross beam 6 to be overlapped.

In order to further optimize the technical solution of the above embodiment, the second lap joint 5 and the third lap joint 12 preferably use high-section lap joints 401 .

In addition, all the above-mentioned parts in the present invention are symmetrically designed in principle.

To facilitate modification, the present invention can adjust the frame width by lengthening or shortening the length of the middle cross beam 6, which can be achieved by adjusting the blanking length of the cross beam on the standard cross beam mold; the vehicle width can also be adjusted by adjusting the width of the side skirt bracket 9; at the same time, the vehicle wheelbase can be adjusted by adjusting the length of the longitudinal beam 2 and the longitudinal beam upper plate 3.

In the present invention, the high-section lap joints 401 and the low-section lap joints 402 are made into serialized standard parts to achieve the overlap between the high-section cross beam 601 and the low-section cross beam 602 and the longitudinal beam 2, and all the high-section lap joints 401 and the low-section lap joints 402 correspond to one state respectively, and all the high-section cross beams 601 and the low-section cross beams 602 also correspond to one state respectively, which can effectively reduce the number of molds and improve production efficiency.

In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims (5)

1. A rear frame platform of a light passenger car, comprising a rear frame assembly and a rear floor (1) overlapped on the rear frame assembly, characterized in that the rear frame assembly is welded by a first longitudinal beam assembly, a second longitudinal beam assembly, a side skirt assembly, an intermediate cross beam (6), and a tail cross beam (10); The first longitudinal beam assembly and the second longitudinal beam assembly are arranged in parallel on both sides of the rear frame assembly, and each of them is composed of a longitudinal beam (2) and a longitudinal beam upper plate (3), and the longitudinal beam (2) and the longitudinal beam upper plate (3) are welded to form a closed cavity; a plurality of lap joints are welded on both sides of the first longitudinal beam assembly and the second longitudinal beam assembly along the axial direction thereof, wherein the lap joints on the two opposite sides of the first longitudinal beam assembly and the second longitudinal beam assembly are the same in number and in corresponding positions, and are the first lap joints (4); the lap joints on the two opposite sides of the first longitudinal beam assembly and the second longitudinal beam assembly are the same in number and in corresponding positions, and are the second lap joints (5); A plurality of intermediate cross beams (6) are provided, and both ends of the intermediate cross beams (6) are overlapped on the overlapped surface of the first overlapped member (4), and the intermediate cross beams (6) are perpendicular to the first longitudinal beam assembly and the second longitudinal beam assembly; The side skirt assembly is arranged on opposite sides of the first longitudinal beam assembly and the second longitudinal beam assembly, and comprises a front side skirt panel (7) and a rear side skirt panel (8), wherein the front side skirt panel (7) and the rear side skirt panel (8) are welded to a side skirt panel bracket (9), and the side skirt panel bracket (9) is overlapped on the overlap surface of the second overlap member (5); The tail cross beam (10) is connected to the rear skirt plate (8) via two corner connectors (11); a third lap joint (12) is welded to the tail ends of the first longitudinal beam assembly and the second longitudinal beam assembly respectively; and the tail cross beam (10) is overlapped on the overlapped surface of the third lap joint (12); The size of the cavity formed by the longitudinal beam (2) and the longitudinal beam upper plate (3) is designed in series according to the actual needs of the bus; the middle cross beam (6), the front side skirt plate (7), the rear side skirt plate (8), the tail cross beam (10), the first lap joint (4), the second lap joint (5), the third lap joint (12), the side skirt plate bracket (9), and the corner connecting member (11) are all series standard parts; The middle cross beam (6) is divided into a high-section cross beam (601) and a low-section cross beam (602) according to the height of the cross section. The high-section cross beam (601) and the low-section cross beam (602) are selected and arranged according to the actual strength requirements of the rear frame platform. A plurality of long grooves (101) are longitudinally distributed in the middle portion of the rear floor (1). 2. A light passenger car rear frame platform according to claim 1, characterized in that the first lap joint (4) is divided into a high-section lap joint (401) and a low-section lap joint (402) according to the height of the cross section, and the high-section lap joint (401) and the low-section lap joint (402) are selected and arranged according to the structure of the middle cross beam (6) to be overlapped. 3. A light passenger vehicle rear frame platform according to claim 2, characterized in that the second lap joint (5) and the third lap joint (12) are selected to use the high-section lap joint (401). 4. A light passenger car rear frame platform according to claim 1, characterized in that the periphery of the rear floor (1) is designed to be flat. 5. A light bus rear frame platform according to claim 1, characterized in that a plane formed by overlapping the rear floor (1) and the rear frame assembly is parallel to a horizontal plane of the bottom of the bus.