Reinforced rear suspension of hydrogen fuel tractor

Abstract

The utility model relates to the technical field of automobile parts, and discloses a hydrogen fuel tractor reinforced rear suspension which comprises two longitudinal beams, the front sides of the two longitudinal beams are both fixedly connected with first transition supports, the rear sides of the two longitudinal beams are both fixedly connected with second transition supports, and the first transition supports and the second transition supports are arranged in parallel. The first transition support and the second transition support are both fixedly connected with a fixing piece located between the two longitudinal beams, each longitudinal beam comprises a connecting part, a supporting part and a fixing part, the connecting parts, the supporting parts and the fixing parts are integrally cast, and the two connecting parts are both fixedly connected with the cross beam. According to the reinforced rear suspension of the hydrogen fuel tractor, the first transition support, the second transition support and the fixing piece are arranged together, so that lateral force transmitted from the ground is effectively borne, deformation can be reduced, the stress of the suspension can be reduced, and the service life of the suspension is prolonged; meanwhile, rigidity is increased, deformation of the lower end of the suspension is reduced, and therefore vehicle stability is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile parts, specifically is a hydrogen fuel tractor reinforced rear suspension. BACKGROUND

[0002] The automobile rear suspension form is the general term of all force transmission connecting devices between the frame (or the load-bearing type vehicle body) and the axle (or the wheel), and is one of the important parameters influencing the automobile comfort type. The automobile suspension includes three parts of the elastic element, the shock absorber and the force transmission device.

[0003] The existing hydrogen fuel tractor rear suspension is a cantilever beam structure, which is easy to cause stress concentration. When the vehicle is in the limit turning and is affected by the lateral wind and the lateral slope, the resultant force of the lateral force of the ground on the intermediate axle and the rear axle reaches the limit, which is about 9T. The rigidity of the lower end of the rear suspension is low, and the deformation amount reaches 14.6mm under the limit working condition. The deformation amount will further increase the lateral displacement of the suspension by 14.6mm, which is not conducive to the driving stability of the vehicle. Through the simulation analysis, the maximum stress of the support is close to the upper end of the support, which is 622.1Mpa. The yield strength of the longitudinal beam is 750Mpa. The safety factor under the limit working condition is 750 / 622.1=1.21, which is slightly greater than the industry required value 1.05, and there is a hidden danger of fracture failure. SUMMARY

[0004] In view of the defects of the prior art, the utility model provides a hydrogen fuel tractor reinforced rear suspension, which has the advantages of reducing the suspension stress, increasing the rigidity of the rear suspension, and solving the problems of the hydrogen fuel tractor rear suspension in the prior art, which is not conducive to the driving stability of the vehicle and has a hidden danger of fracture failure.

[0005] In order to achieve the above-mentioned purpose of reducing the suspension stress and increasing the rigidity of the rear suspension, the utility model provides the following technical scheme: a hydrogen fuel tractor reinforced rear suspension, comprising two longitudinal beams, the front side of each of the two longitudinal beams is fixedly connected with a first transition support, the rear side of each of the two longitudinal beams is fixedly connected with a second transition support, and the first transition support and the second transition support are fixedly connected with a fixing piece between the two longitudinal beams.

[0006] Preferably, each of the two longitudinal beams comprises a connecting part, a supporting part and a fixing part, the connecting part, the supporting part and the fixing part are integrally cast, each of the two connecting parts is fixedly connected with a cross beam, the bottom of each of the two connecting parts is provided with a supporting part, the bottom of each of the two supporting parts is provided with a fixing part, and three fixing holes are formed in the front and rear sidewalls of each of the two fixing parts.

[0007] Preferably, the first transition support and the second transition support are both provided with through holes corresponding to the fixing holes, and the through holes are fixedly connected with fixing bolts, one end of each fixing bolt extending into the fixing hole and being fixedly connected with the fixing hole.

[0008] Preferably, the three fixing holes on the front and rear sidewalls of each fixing portion are triangularly distributed, and the fixing bolts in the lower two fixing holes are fixedly connected with the first mandrel.

[0009] Preferably, the first mandrel is rotatably connected with a first bushing, and the first bushing is fixedly connected with a thrust rod on the opposite side, and the thrust rod is fixedly connected with a second bushing at the end away from the first bushing, and the second bushing is rotatably connected with a second mandrel.

[0010] Preferably, the first bushing and the second bushing are both provided with a buffer washer, and the first bushing and the second bushing are rotatably connected with the first mandrel and the second mandrel through the buffer washer.

[0011] Preferably, the front two second mandrels are fixedly connected with the middle bridge support, and the rear two second mandrels are fixedly connected with the rear bridge support.

[0012] Preferably, each fixing portion is in a U-shaped structure, and the opposite sides of the front two first bushings and the rear two first bushings are located inside the fixing portion.

[0013] Compared with the prior art, the hydrogen fuel tractor reinforced rear suspension has the following beneficial effects:

[0014] The hydrogen fuel tractor reinforced rear suspension effectively bears the lateral force transmitted from the ground, reduces the deformation, reduces the suspension stress, prolongs the service life of the suspension, increases the rigidity, reduces the deformation of the lower end of the suspension, and enhances the stability of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 The figure is a structural schematic view of the utility model;

[0016] Fig. 2 The figure is a structural schematic view of the utility model.

[0017] In the figure: 1, longitudinal beam; 101, connecting portion; 102, supporting portion; 103, fixing portion; 131, fixing hole; 2, first transition support; 3, second transition support; 4, fixing piece; 5, cross beam; 6, fixing bolt; 7, first mandrel; 8, first bushing; 9, thrust rod; 10, second bushing; 11, second mandrel. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0019] Please refer to Figs. 1-2 A hydrogen fuel tractor reinforced rear suspension, the material adopts austenite-bainite nodular cast iron, namely ADI1050, including two longitudinal beams 1, two longitudinal beams 1 all include connecting part 101, support part 102 and fixed part 103, connecting part 101, support part 102 and fixed part 103 are integrally cast, two connecting parts 101 are all fixedly connected with cross beam 5, the bottom of two connecting parts 101 is all provided with support part 102, the bottom of two support parts 102 is all provided with fixed part 103, the front and rear two side walls of two fixed parts 103 are all provided with three fixed holes 131, the front side of two longitudinal beams 1 is all fixedly connected with first transition support 2, the rear side of two longitudinal beams 1 is all fixedly connected with second transition support 3, first transition support 2 and second transition support 3 are all fixedly connected with fixed part 4 between two longitudinal beams 1, the material of first transition support 2, second transition support 3 and fixed part 4 is all DL700, the thickness is 5mm, first transition support 2 and second transition support 3 are all provided with through hole corresponding with fixed hole 131, the through hole is fixedly connected with fixed bolt 6, one end of fixed bolt 6 extends into fixed hole 131 and is fixedly connected with it, three fixed holes 131 of the front and rear two side walls of two fixed parts 103 are all triangular distribution, and the outer part of fixed bolt 6 in the lower two fixed holes 131 is all fixedly connected with first core shaft 7, four first core shafts 7 are respectively located on the opposite side of first transition support 2 and second transition support 3, the outer part of four first core shafts 7 is all rotatably connected with first bushing 8, two fixed parts 103 are all U-shaped structure, the opposite side of front two first bushings 8 and rear two first bushings 8 is all located in the inside of fixed part 103, the opposite side of front two first bushings 8 and rear two first bushings 8 is all fixedly connected with push rod 9, the end away from first bushing 8 of four push rods 9 is all fixedly connected with second bushing 10, the inside of four second bushings 10 is all rotatably connected with second core shaft 11, front two second core shafts 11 are all fixedly connected with middle axle support, rear two second core shafts 11 are all fixedly connected with rear axle support, the inside of first bushing 8 and second bushing 10 is all provided with buffer washer, first bushing 8 and second bushing 10 are rotatably connected with first core shaft 7 and second core shaft 11 respectively through buffer washer.

[0020] In summary, the hydrogen fuel tractor enhanced rear suspension, by setting the fixing hole 131, the first transition bracket 2 and the second transition bracket 3 are fixedly connected with the longitudinal beam 1, the strength and rigidity of the longitudinal beam 1 support part 102 are increased, the two connecting parts 101 are fixedly connected through the cross beam 5, so that the upper, lower, left and right of the rear suspension are connected, which is no longer a cantilever beam structure, but a closed section, when the vehicle turns, the lateral force of the ground on the middle axle tire will be transmitted to the lower end of the two longitudinal beams 1 in turn through the middle axle wheel→middle axle→middle axle bracket→front two thrust rods 9. Similarly, the lateral force of the ground on the rear axle tire will also be transmitted to the lower end of the two longitudinal beams 1 in turn through the rear axle wheel→rear axle→rear axle bracket→rear two thrust rods 9. The rear suspension of the vehicle has a full load axle load of 18T. When the vehicle turns in the limit state and is affected by the lateral wind and the lateral slope, the superimposed force of the lateral force of the ground on the middle axle and the rear axle reaches the limit state of about 9T. At this time, the rear suspension structure is no longer a cantilever beam structure, but together with the transition bracket 1, the transition bracket 3 and the fixing part 4, effectively bears the lateral force transmitted from the ground, the deformation is reduced, the stress is further reduced and improved; the deformation amount under the limit condition is reduced from 14.6mm of the unenhanced to 11.3mm of the enhanced, and the deformation amount is 11.3 / 14.6=77% of the original, effectively increasing the vehicle driving stability. The maximum stress is close to the upper end of the bracket, which is 480.8Mpa, the yield strength of the longitudinal beam 1 is 750Mpa, and the safety factor is 750 / 480.8=1.56, which is better than 1.21 of the rear suspension in the prior art, and is obviously better than the industry requirement value 1.05. That is, the safety factor is 1.56 / 1.21=1.29 times of the unenhanced, and the stress is 480.8 / 622.1=77% of the rear suspension in the prior art. By setting the buffer washer, since the first core shaft 7 and the second core shaft 11 are rigid structures, the buffer washer can prevent the vibration generated during vehicle driving from being transmitted to the rear suspension, protect the rear suspension to a certain extent, and prolong the service life. In turn, the hydrogen fuel tractor enhanced rear suspension can reduce the suspension stress, improve the suspension life, increase the rigidity, reduce the deformation of the lower end of the suspension, and enhance the vehicle stability, thereby being worth popularizing.

[0021] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it is intended to be limited only by the words recited in the appended claims. The scope of the present application shall be limited only by the claims.

[0022] While the embodiments of the present application have been shown and described with respect to particular embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application. Therefore, the scope of the application should not be limited by the embodiments, but should be defined only in accordance with the following claims and their equivalents.

Claims

1. A reinforced rear suspension for a hydrogen fuel tractor, comprising two longitudinal beams (1), characterized in that: The front side of each of the two longitudinal beams (1) is fixedly connected with a first transition support (2), and the rear side of each of the two longitudinal beams (1) is fixedly connected with a second transition support (3); the first transition support (2) and the second transition support (3) are fixedly connected with a fixing member (4) between the two longitudinal beams (1).

2. The reinforced rear suspension for a hydrogen fuel-powered tractor vehicle of claim 1, wherein: Each of the two longitudinal beams (1) comprises a connecting portion (101), a supporting portion (102) and a fixing portion (103), which are integrally cast; the two connecting portions (101) are fixedly connected with a cross beam (5) therebetween; the bottom of each of the two connecting portions (101) is provided with a supporting portion (102); the bottom of each of the two supporting portions (102) is provided with a fixing portion (103); and the front and rear sidewalls of each of the two fixing portions (103) are provided with three fixing holes (131).

3. The reinforced rear suspension for a hydrogen fuel-powered tractor vehicle of claim 2, wherein: The first transition support (2) and the second transition support (3) are provided with through holes corresponding to the fixing holes (131); the through holes are fixedly connected with fixing bolts (6) extending into the fixing holes (131) and fixedly connected with the fixing holes (131).

4. The reinforced rear suspension for a hydrogen fuel-powered tractor vehicle of claim 3, wherein: The three fixing holes (131) in the front and rear sidewalls of each of the two fixing portions (103) are triangularly distributed, and the fixing bolts (6) in the lower two fixing holes (131) are fixedly connected with first core shafts (7) outside the fixing bolts (6).

5. The reinforced rear suspension for a hydrogen fuel-powered tractor vehicle of claim 4, wherein: The outer portions of the four first core shafts (7) are rotatably connected with first bushings (8); the opposite sides of the front two first bushings (8) and the rear two first bushings (8) are fixedly connected with thrust rods (9); the ends of the four thrust rods (9) away from the first bushings (8) are fixedly connected with second bushings (10); and the inner portions of the four second bushings (10) are rotatably connected with second core shafts (11).

6. A reinforced rear suspension for a hydrogen fuel-powered tractor vehicle as set forth in claim 5, characterized in that: The first bushings (8) and the second bushings (10) are provided with buffer washers inside; and the first bushings (8) and the second bushings (10) are rotatably connected with the first core shafts (7) and the second core shafts (11) through the buffer washers.

7. The reinforced rear suspension for a hydrogen fuel-powered tractor vehicle of claim 5, wherein: The front two second core shafts (11) are fixedly connected with a middle bridge support, and the rear two second core shafts (11) are fixedly connected with a rear bridge support.

8. The reinforced rear suspension for a hydrogen fuel-powered tractor vehicle of claim 5, wherein: Each of the two fixing portions (103) is in a U-shaped structure, and the opposite sides of the front two first bushings (8) and the rear two first bushings (8) are located inside the fixing portions (103).

Images