CN215245107U

CN215245107U - Auxiliary frame structure convenient to process and assemble

Info

Publication number: CN215245107U
Application number: CN202121328642.6U
Authority: CN
Inventors: 闻步正
Original assignee: Zhejiang Zero Run Technology Co Ltd
Current assignee: Zhejiang Leapmotor Technology Co Ltd; Zhejiang Zero Run Technology Co Ltd
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2021-12-21
Anticipated expiration: 2031-06-15

Abstract

The utility model discloses an auxiliary frame structure convenient for processing and assembling, which comprises a left longitudinal beam and a right longitudinal beam, wherein a front cross beam is connected between the front ends of the two longitudinal beams, and the front cross beam comprises a first cross beam part and a second cross beam part; two ends of the first cross beam component are respectively and fixedly connected with the front ends of the two longitudinal beams; the axial direction of the second cross member is parallel to the axial direction of the first cross member; the second cross member is secured beneath the first cross member by a mountable structure. The utility model has the advantages that: the processing difficulty and the compression processing time can be obviously reduced, the assembly efficiency is improved, the material is saved, and the strength can be improved.

Description

Auxiliary frame structure convenient to process and assemble

Technical Field

The utility model relates to an automobile structure field specifically is a sub vehicle frame structure convenient to processing and assembly.

Background

Chinese patent document CN112498491A discloses "an automobile chassis collision force transmission mechanism and a force transmission method" in 2021, 3/16, which includes: two automobile body longerons, the sub vehicle frame of constituteing is connected by two sub vehicle frame longerons and two sub vehicle frame crossbeams, and four one-to-one are located four bights of sub vehicle frame and are connected with two automobile body longeron respectively the installation pipe, two be used for with the front deck floor be connected and with two sub vehicle frame longeron rear end one-to-one be connected last power transmission connecting rod, two be used for with the automobile body before the threshold roof beam be connected and with two sub vehicle frame longeron rear end downside one-to-one be connected lower power transmission connecting rod. The automobile chassis collision force transmission mechanism brings the front auxiliary frame 3 into a force transmission path of collision acting force, and the force transmission effect of collision force is good. Under the requirement of lightweight, the crossbeam of sub vehicle frame more will adopt the aluminium alloy to make. The front cross beam of the traditional auxiliary frame is large in size, complex in section shape and high in process requirement, so that large-tonnage extrusion equipment is required; the upper part of the section needs to be combined with the end parts of the two longitudinal beams, a long-sized combining part needs to be reserved, and the lower part of the section needs to be partially cut off through machining so as to avoid interference with the longitudinal beams, so that the processing time is long, the cost is high, and the material utilization rate is low; in addition, the shape of the upper and lower sections of the prior art profile is changed violently, which also results in poor local strength.

SUMMERY OF THE UTILITY MODEL

Based on above problem, the utility model provides a sub vehicle frame structure convenient to processing and assembly can show and reduce the processing degree of difficulty, compression process time, improves assembly efficiency, and material saving can also improve intensity simultaneously.

In order to realize the purpose of the invention, the utility model adopts the following technical scheme: a subframe structure convenient to process and assemble comprises a left longitudinal beam and a right longitudinal beam, wherein a front cross beam is connected between the front ends of the two longitudinal beams and comprises a first cross beam component and a second cross beam component; two ends of the first cross beam component are respectively and fixedly connected with the front ends of the two longitudinal beams; the axial direction of the second cross member is parallel to the axial direction of the first cross member; the second cross member is secured beneath the first cross member by a mountable structure.

Preferably, the cross-sectional shape of the first cross member includes a first cross member lower side plate and a first cross member rear side plate; the cross-sectional shape of the second cross member includes a second cross member upper side plate and a second cross member rear side plate; the upper side plate of the second beam part is fixedly connected with the lower side plate of the first beam part, the rear side plate of the second beam part comprises an upper part and a lower part which are connected, and the upper part is positioned above the top surface of the upper side plate of the second beam part; the upper portion of the second cross member rear side plate is fixed to the first cross member rear side plate.

Preferably, the cross-sectional shape of the second cross member is a complex shape, the upper part is a right trapezoid having a large upper part and a small lower part, the lower part is a rectangle, and the lower bottom surface of the right trapezoid overlaps the top surface of the lower rectangle.

Preferably, a reinforcing rib is arranged in the second cross beam part, the reinforcing rib extends along the horizontal direction, and the front end and the rear end of the reinforcing rib are respectively connected with the front side wall and the rear side wall of the second cross beam part.

Preferably, the front side wall and/or the rear side wall of the second cross member is provided with lightening holes.

Preferably, the first cross member and the second cross member are both profiles.

The sub vehicle frame structure of being convenient for processing and assembly of this scheme design is including controlling two longerons like traditional structure, and is connected with the front beam between the front end of two longerons. The biggest difference between the scheme and the traditional scheme is that the front cross beam in the scheme is formed by combining a first cross beam part and a second cross beam part. The first cross beam component is longer, two ends of the first cross beam component are fixedly connected with the front ends of the two longitudinal beams respectively, the second cross beam component is shorter, the axial direction of the second cross beam component is parallel to the axial direction of the first cross beam component, the second cross beam component is fixed below the first cross beam component through the mountable structure, and the first cross beam component and the second cross beam component form a front cross beam together. Therefore, the cutting of the lower part of the section is completed without complex machining, and the effect of the prior art can be realized only by simple assembly and fixation. Because with the split of front beam into first beam part and second beam part, and the cross sectional shape of two beam parts is straight, eliminated because of the violent change of cross sectional shape leads to the poor problem of structural strength, consequently through bolted connection back bulk strength compare traditional scheme and have obvious promotion. The mountable structure is selected by one skilled in the art as desired in the existing structure, and may be a snap fit, a plug fit, a threaded connection, etc. From the viewpoint of ease of manufacture, it is recommended that the first cross member and the second cross member each employ a profile. And in specific detail structure, first crossbeam part downside board is below first crossbeam part, the rear is first crossbeam part posterior lateral plate, it is corresponding, second crossbeam part corresponding design has second crossbeam part upside board and first crossbeam part downside board adaptation, design has second crossbeam part posterior lateral plate and first crossbeam part posterior lateral plate adaptation, and the part of second crossbeam part posterior lateral plate is higher than the top surface of second crossbeam part upside board, consequently, the cooperation of inside and outside two L shapes has been formed in the cross-section visual angle, guarantee to connect after all firm reliable in X to, Y to and Z upwards. The cross-sectional shape of the second beam part is determined by process design, and in the scheme, the cross-sectional shape is designed into a rectangle below an upper right-angled trapezoid. The second beam part is internally provided with a reinforcing rib for reinforcing the support in the X direction. In order to further lighten the weight and reduce the self weight of the automobile, on the premise of ensuring the strength, the front side wall and/or the rear side wall of the second cross beam part are/is provided with lightening holes. The positions of the shapes and the sizes of the lightening holes are determined by the skilled person according to accurate design calculation.

To sum up, the beneficial effects of the utility model are that: the processing difficulty and the compression processing time can be obviously reduced, the assembly efficiency is improved, the material is saved, and the strength can be improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of another view angle of the structural diagram of the present invention.

Fig. 3 is a front view of the middle front cross member of the present invention.

Fig. 4 is a right side view of fig. 3.

FIG. 5 is a schematic structural view of a prior art subframe structure.

FIG. 6 is a schematic view of another prior art subframe structure from another perspective.

FIG. 7 is a front view of a prior art front cross member.

Fig. 8 is a right side view of fig. 7.

Wherein: 1 longitudinal beam, 2 front cross beams, 21 a first cross beam component, 211 a first cross beam component lower side plate, 212 a first cross beam component rear side plate, 22 a second cross beam component, 221 a second cross beam component upper side plate, 222 a second cross beam component rear side plate, 223 reinforcing ribs and 224 lightening holes; c redundant part.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

The embodiment is a subframe structure convenient to process and assemble, and is applied to a chassis assembly of a certain electric automobile.

First look at the prior art. As shown in fig. 5 and 6, the subframe structure in the prior art includes two left and right longitudinal beams 1, and a front cross member 2 is connected between front ends of the two longitudinal beams 1. As shown in fig. 7 and 8, the front cross member 2 is made of a profile by integrally machining, the left and right ends above the profile are longer, and the lower part of the profile is shorter, the profile is cut according to the length requirement above in the conventional processing mode, and then the lower redundant part C, i.e. the shaded position shown in fig. 7, is removed by machining, which causes the section shape of the front cross member 2 to be changed drastically, and the strength of the whole structure to be poor. As can be seen from fig. 8, the profile has a large size, a complicated cross-sectional shape, and high process requirements, and therefore, a large-tonnage extrusion apparatus is required. Therefore, the prior art has high equipment requirement, long processing time, high cost and low material utilization rate.

The overall shape of the subframe structure of the present embodiment is as shown in fig. 1 and fig. 2, and still includes two left and right longitudinal beams 1, and a front cross beam 2 is connected between the front ends of the two longitudinal beams 1, but the front cross beam 2 of the present embodiment is significantly different from the prior art. As shown in fig. 3, the front cross member 2 includes a first cross member 21 and a second cross member 22, both of which are shaped. The first cross beam member 21 is long, two ends of the first cross beam member are fixedly connected with the front ends of the two longitudinal beams 1 respectively, the second cross beam member 22 is short, the axial direction of the second cross beam member is parallel to the axial direction of the first cross beam member 21, the second cross beam member is fixed below the first cross beam member 21 through an installable structure, and the first cross beam member and the second cross beam member form the front cross beam 2. As shown in fig. 4: the upper first cross member 21 has an approximately rectangular cross-sectional shape, and includes a first cross member lower side plate 211 located at the lower portion and a first cross member rear side plate 212 located at the rear portion. The cross-sectional shape of the lower second cross member 22 is a complex shape, the upper part is a right trapezoid with a large upper part and a small lower part, the lower part is an approximate rectangle, and the lower bottom surface of the right trapezoid coincides with the top surface of the lower rectangle. The top surface of the right trapezoid is the second beam member upper side plate 221. The oblique side of the right trapezoid is a second beam member rear side plate 222, the major portion of the second beam member rear side plate 222 is located below the top surface of the second beam member upper side plate 221, and the minor portion of the second beam member rear side plate 222 extends upward above the top surface of the second beam member upper side plate 221 to form an L-shape with the second beam member upper side plate 221. The second cross member upper side plate 221 is fitted to the first cross member lower side plate 211 to be detachably fixed by a pair of bolt pairs, and the second cross member rear side plate 222 is fitted to the first cross member rear side plate 212 to be detachably fixed by a pair of bolt pairs.

The second beam member 22 is provided with a reinforcing rib 223 therein, the reinforcing rib 223 extends along the horizontal direction, and the front and rear ends of the reinforcing rib 223 are respectively connected to the front and rear side walls of the second beam member 22, so as to achieve the effect of reinforcing the structure in the front and rear directions. Lightening holes 224 are provided in the front and rear side walls of the second cross member 22 to lighten the parts.

The connection mode of the first beam member 21 and the two longitudinal beams 1 in the present solution is slightly different from the prior art, and the extra portion C, i.e. the shadow portion in fig. 3, needs to be obliquely cut off. The comparison shows that the area cut by the scheme is obviously reduced. If the scheme continues to use the connection mode in the prior art, the cutting is not needed at all, so that the scheme remarkably compresses the machining time, saves materials and improves the assembly efficiency. First beam part 21 and second beam part 22 are the straight section bar of shape, have eliminated because of the violent change of cross-sectional shape leads to the poor problem of structural strength, consequently have obvious promotion through bolted connection back bulk strength compare traditional scheme. Simultaneously, this scheme divides into two simple section bars with a complicated section bar, has simplified the structure, has reduced the requirement to processing equipment.

Claims

1. A subframe structure convenient to process and assemble comprises a left longitudinal beam (1) and a right longitudinal beam (1), wherein a front cross beam (2) is connected between the front ends of the two longitudinal beams (1), and the subframe structure is characterized in that the front cross beam (2) comprises a first cross beam part (21) and a second cross beam part (22); two ends of the first cross beam component (21) are respectively fixedly connected with the front ends of the two longitudinal beams (1); the axial direction of the second cross member (22) is parallel to the axial direction of the first cross member (21); the second beam member (22) is fixed below the first beam member (21) by a mountable structure.

2. The subframe structure for facilitating the manufacture and assembly as set forth in claim 1, wherein the cross-sectional shape of the first cross member (21) includes a first cross member lower side plate (211) and a first cross member rear side plate (212); the cross-sectional shape of the second cross member includes a second cross member upper side plate (221) and a second cross member rear side plate (222); the upper side plate (221) of the second cross beam part is fixedly connected with the lower side plate (211) of the first cross beam part, the rear side plate (222) of the second cross beam part comprises an upper part and a lower part which are connected, and the upper part is positioned above the top surface of the upper side plate (221) of the second cross beam part; the upper part of the second cross member rear side plate (222) is fixed to the first cross member rear side plate (212).

3. The auxiliary frame structure for facilitating the manufacture and assembly as claimed in claim 1 or 2, wherein the cross-sectional shape of the second cross member (22) is a complex shape having a right trapezoid shape with a large upper portion and a small lower portion, and a rectangular shape with a lower bottom surface coinciding with a top surface of the lower rectangle.

4. The auxiliary frame structure convenient to process and assemble as claimed in claim 3, wherein a reinforcing rib (223) is provided in the second cross member (22), the reinforcing rib (223) extends in the horizontal direction, and the front and rear ends of the reinforcing rib (223) are connected to the front and rear side walls of the second cross member (22), respectively.

5. The auxiliary frame structure for facilitating the manufacture and assembly as claimed in claim 1 or 2, wherein the front side wall and/or the rear side wall of the second cross member (22) is provided with lightening holes (224).

6. A subframe structure for facilitating manufacture and assembly according to claim 1 or 2, wherein the first cross member (21) and the second cross member (22) are both profiles.