CN205768461U

CN205768461U - Rear axle crossbeam

Info

Publication number: CN205768461U
Application number: CN201620507362.4U
Authority: CN
Inventors: 许光
Original assignee: Shanghai Huizhong Automotive Manufacturing Co Ltd
Current assignee: Shanghai Huizhong Automotive Manufacturing Co Ltd
Priority date: 2016-05-30
Filing date: 2016-05-30
Publication date: 2016-12-07
Anticipated expiration: 2026-05-30

Abstract

This utility model provides a kind of rear axle crossbeam, and its plate using thickness to be less than or equal to 4 millimeters is made, and the section of the interlude of described rear axle crossbeam is semi arch, and the internal diameter of described semi arch is more than the thickness of described plate.This utility model rear axle crossbeam is on the basis of strengthening curvature of space, use the structure of Discrete control intensity, the section at rear axle crossbeam interlude and rear axle crossbeam two ends is optimized design respectively, efficiently control and reduce the stress of rear axle crossbeam each several part, not only ensure that curvature of space trend but also meet movement clearance.

Description

Rear axle crossbeam

Technical field

This utility model relates to automotive field, and particularly to a kind of rear axle crossbeam, it is particularly well-suited to reduce turns round Beam back axle open section and curvature of space cross-beam body stress.

Background technology

In automotive field, in order to reduce manufacturing cost, the rear axle crossbeam of current torsion beam generally uses opening Section and not high-intensity steel, it is desirable to the static stress everywhere of cross-beam body is less than 600MPa.

Fig. 1 is the upward view of tradition rear axle crossbeam.Fig. 2 is the rearview of tradition rear axle crossbeam.Fig. 3 is for passing The top view of system rear axle crossbeam.As shown in Figure 1 to Figure 3, in order to reach requirements above, conventional crossbeam steel plate Thickness generally to reach 4 millimeters and more than, and rear axle crossbeam 10 the most directly or only middle part is slightly upward Bending.Rear axle crossbeam 10 bends the most on a vertical plane, and camber L is less than 25 millimeters.

But, in practice, arrangement is required to dodge its Surrounding Parts, it is therefore desirable to use sky Between bend crossbeam.If still using thicker crossbeam and skirt section to need flange to overcome the sanction material stress at edge, Bigger difficulty will be produced on technological forming, such as, can produce elastic deformation and machining stress etc..

Utility model content

The technical problems to be solved in the utility model be in order to overcome in prior art rear axle crossbeam the most straight or The only slightly upward bending in middle part, it is impossible to dodge the defects such as its Surrounding Parts, it is provided that a kind of rear axle crossbeam.

This utility model solves above-mentioned technical problem by following technical proposals: a kind of rear axle crossbeam, Its feature is, described rear axle crossbeam uses the thickness plate less than or equal to 4 millimeters to make, described rear axle crossbeam The section of interlude be semi arch, the internal diameter of described semi arch is more than the thickness of described plate.

It is preferred that 11 times of the thickness that the internal diameter of described semi arch is described plate.

It is preferred that the two ends of described rear axle crossbeam use square cross-section and transition section to combine.

It is preferred that the two ends of described rear axle crossbeam are respectively arranged with reinforcing plate, described reinforcing plate is to described back axle The middle part of crossbeam extends.

It is preferred that the filleted corner of the square cross-section at the two ends of described rear axle crossbeam is close to the plate of described rear axle crossbeam Thickness.

It is preferred that the radius of described filleted corner is less than or equal to 10mm.

It is preferred that the opening direction of described rear axle crossbeam is hypsokinesis.

It is preferred that the hypsokinesis angle of the section of the interlude of described rear axle crossbeam is θ 1, described rear axle crossbeam The hypsokinesis angle of transition section is θ 2, and the difference of hypsokinesis angle, θ 1 and hypsokinesis angle, θ 2 is 3 °-4 °.

It is preferred that the opening direction of the section of the interlude of described rear axle crossbeam is in leaning forward.

It is preferred that before the semi arch internal diameter of the section of the interlude of described rear axle crossbeam and described rear axle crossbeam Rear skirt section internal diameter and front and back skirt section difference in the height direction is equal.

Positive progressive effect of the present utility model is:

This utility model rear axle crossbeam, on the basis of strengthening curvature of space, uses the structure of Discrete control intensity, The section at rear axle crossbeam interlude and rear axle crossbeam two ends is optimized design respectively, efficiently controls also Reduce the stress of rear axle crossbeam each several part, not only ensure that curvature of space trend but also meet movement clearance.

Accompanying drawing explanation

The above and other feature of this utility model, character and advantage will be by below in conjunction with the accompanying drawings and real Executing the description of example and become apparent, the most identical reference represents identical feature all the time, Wherein:

Fig. 1 is the upward view of tradition rear axle crossbeam.

Fig. 2 is the rearview of tradition rear axle crossbeam.

Fig. 3 is the top view of tradition rear axle crossbeam.

Fig. 4 is the upward view of this utility model rear axle crossbeam.

Fig. 5 is the rearview of this utility model rear axle crossbeam.

Fig. 6 is the top view of this utility model rear axle crossbeam.

Fig. 7 is the sectional drawing cut open along line A-A in Fig. 5.

Fig. 8 is the sectional drawing cut open along line B-B in Fig. 5.

Fig. 9 is the sectional drawing cut open along line C-C in Fig. 5.

Detailed description of the invention

For above-mentioned purpose of the present utility model, feature and advantage can be become apparent, below in conjunction with accompanying drawing pair Detailed description of the invention of the present utility model elaborates.

With detailed reference to accompanying drawing, embodiment of the present utility model is described now.Now new with detailed reference to this practicality The preferred embodiment of type, its example is shown in the drawings.In the case of any possible, in all of the figs Same or analogous part is represented by using identical labelling.Although additionally, used in this utility model Term be to select from public term, but mentioned some in this utility model description Term is probably what applicant was selected by his or her judgement, its detailed meanings being correlated with in description herein Explanation in part.Additionally, require not only by the actual terms used, and it is also to by each art The meaning that language is contained is to understand this utility model.

Fig. 4 is the upward view of this utility model rear axle crossbeam.Fig. 5 is the backsight of this utility model rear axle crossbeam Figure.Fig. 6 is the top view of this utility model rear axle crossbeam.Fig. 7 is the section cut open along line A-A in Fig. 5 Figure.Fig. 8 is the sectional drawing cut open along line B-B in Fig. 5.Fig. 9 is the section cut open along line C-C in Fig. 5 Figure.

As shown in Fig. 4 to Fig. 9, the utility model discloses a kind of rear axle crossbeam 20, it uses thickness to be less than Plate equal to 4 millimeters is made, and the section of the interlude of rear axle crossbeam 20 is semi arch, described semi arch Internal diameter is more than the thickness of described plate.Preferably, the internal diameter of described semi arch is 11 times of thickness of described plate.

So can the most preferably reduce the stress of rear axle crossbeam body, weight reduction and make space horizontal The moulding process simple possible of beam.

Rear axle crossbeam 20 bends the most on a vertical plane, and the most also has substantially bending, camber H is more than 40mm.Therefore, square cross-section and transition section is used to combine at the two ends of rear axle crossbeam 20.Also That is, after the thickness of slab that rear axle crossbeam 20 have employed less than or equal to 4 millimeters, it additionally uses segmentation Be designed to the scheme of different section: interlude be semi arch be main section, semi arch internal diameter be thickness of slab 11 Times, crossbeam two ends are that square cross-section, changeover portion face are mixed by both sections.

The two ends of rear axle crossbeam 20 are respectively arranged with reinforcing plate 21 so that reinforcing plate 21 is to rear axle crossbeam 20 Middle part extend.Wherein, the filleted corner R1 of the square cross-section at the two ends of rear axle crossbeam 20 is close to rear axle crossbeam The thickness of the plate of 20, so can reduce the weld stress between crossbeam and longeron.The radius of filleted corner R1 It is preferably less than equal to 10mm.

So can better control over and effectively reduce crossbeam two ends bottom stress, it is simple to the reinforcement at welding two ends Plate, needs crossbeam two ends to extend in the middle part of crossbeam in the case of less than torsional rigidity limit value as far as possible, makes simultaneously More square section filleted corner R1 radius is less than or equal to 10mm.

Especially, the opening direction of rear axle crossbeam 20 is hypsokinesis.This is horizontal in order to reduce torsion-beam back axle further The stress in back portion, in order to using softer steel plate to facilitate technological forming, through overtesting and checking, crossbeam is opened Mouthful direction should slightly hypsokinesis, can not lean forward.Wherein, the back rake angle of the section of the interlude of rear axle crossbeam 20 Degree is for θ 1, and the hypsokinesis angle of the transition section of rear axle crossbeam 20 is θ 2, and hypsokinesis angle, θ 1 and hypsokinesis angle The difference of θ 2 is 3 °-4 °.But it is not limited at end and rear axle crossbeam welded seam.

The above-mentioned this anglec of rotation, essentially without too much influence rear axle crossbeam, can meet its Surrounding Parts Clearance requirement, this mainly due to: first, mid-section have employed half-circle-arc shape, semicircle herein Arc section compares the torque contribution rate that can also improve Unit Weight with square cross-section；Secondly, have employed suitably Section rotation centerline.Such as, mid-section have employed semi arch center of circle O, and two ends section have employed shape The heart as above-mentioned section center of rotation (described center of rotation be positioned at section outer surface close after formed several What centre of form).This method both can ensure that the crossbeam that curvature of space moves towards, and can meet again movement clearance.

The opening direction of the section of the interlude of rear axle crossbeam 20 is in leaning forward.Preferably, before in order to reduce crossbeam Rear skirt section stress, needs to mate front and back's skirt section length.Calculate and test after proving that front skirt section stress is relatively Skirt section is big, needs front skirt section more compared with rear skirt section stretch downward, this section Z coordinate (automobile of middle position Car load coordinate) difference approximates semi arch internal diameter R2, then go to zero toward this difference behind two ends.It is to say, back axle Skirt section internal diameter and front before and after the semi arch internal diameter R2 of the section of the interlude of crossbeam 20 and rear axle crossbeam 20 Poor M in the height direction is equal in rear skirt section.

In sum, this utility model rear axle crossbeam, on the basis of strengthening curvature of space, uses Discrete control The structure of intensity, is optimized design respectively by the section at rear axle crossbeam interlude and rear axle crossbeam two ends, Efficiently control and reduce the stress of rear axle crossbeam each several part, not only ensure that curvature of space trend but also meet Movement clearance.

Although the foregoing describing detailed description of the invention of the present utility model, but those skilled in the art should Understanding, these are merely illustrative of, and protection domain of the present utility model is defined by the appended claims. Those skilled in the art, can be real to these on the premise of without departing substantially from principle of the present utility model and essence The mode of executing makes various changes or modifications, but these changes and amendment each fall within protection model of the present utility model Enclose.

Claims

1. a rear axle crossbeam, it is characterised in that described rear axle crossbeam uses thickness to be less than or equal to 4 millimeters Plate is made, and the section of the interlude of described rear axle crossbeam is semi arch, and the internal diameter of described semi arch is more than described The thickness of plate.

2. rear axle crossbeam as claimed in claim 1, it is characterised in that the internal diameter of described semi arch is described 11 times of the thickness of plate.

3. rear axle crossbeam as claimed in claim 1, it is characterised in that the two ends of described rear axle crossbeam use Square cross-section and transition section combine.

4. rear axle crossbeam as claimed in claim 1, it is characterised in that the two ends of described rear axle crossbeam are respectively Being provided with reinforcing plate, described reinforcing plate extends to the middle part of described rear axle crossbeam.

5. rear axle crossbeam as claimed in claim 3, it is characterised in that the two ends of described rear axle crossbeam The filleted corner of square cross-section is close to the thickness of the plate of described rear axle crossbeam.

6. rear axle crossbeam as claimed in claim 5, it is characterised in that the radius of described filleted corner is less than Equal to 10mm.

7. rear axle crossbeam as claimed in claim 1, it is characterised in that the openings of described rear axle crossbeam To in hypsokinesis.

8. rear axle crossbeam as claimed in claim 7, it is characterised in that the interlude of described rear axle crossbeam The hypsokinesis angle of section be θ 1, the hypsokinesis angle of the transition section of described rear axle crossbeam is θ 2, and back rake angle Degree θ 1 is 3 °-4 ° with the difference of hypsokinesis angle, θ 2.

9. the rear axle crossbeam as described in claim 1-8 any one, it is characterised in that described back axle is horizontal The opening direction of the section of the interlude of beam is in leaning forward.

10. rear axle crossbeam as claimed in claim 9, it is characterised in that the interlude of described rear axle crossbeam Section semi arch internal diameter and described rear axle crossbeam before and after skirt section internal diameter and front and back skirt section in short transverse On difference equal.