CN201544743U - Asymmetric balance suspension device suitable for heavy truck - Google Patents

Abstract

The utility model relates to an asymmetric balance suspension device suitable for a heavy truck, comprising two rear steel plate spring assemblies connected between a frame and a balance shaft, a front upper push rod, a rear upper push rod, a front lower push rod and a rear lower push rod which link a middle axle and a rear axle; the steel plate springs of the rear steel plate spring assemblies are in asymmetric trapezoid; and the ratio of a distance L1 between the center bolt locking shaft and the middle axle supporting point and a distance L2 between the center bolt locking shaft and the rear axle supporting point is 4:6; the length ratio of the front upper push rod and the rear upper push rod is 4:6; and the length ratio of the front lower push rod and the rear lower push rod is 4:6. The utility model employs the asymmetric balance suspension structure, ensures that the bearing performance of the vehicle whose one dead axle is substituted for a drive axle for reducing fuel consumption is not significantly decreased and meanwhile it greatly improves the whole vehicle power performance and the climbing performance relative to the balance suspension.

Description

Be applicable to the asymmetric equalizing-suspension device of heavy duty truck

Technical field

The utility model relates to the equalizing-suspension device of vehicle, is specifically related to a kind of equalizing-suspension device of heavy duty truck.

Background technology

The oil plant cost that produces when using in order to reduce vehicle is realized energy-saving and emission-reduction, and general employing reduces the quantity of drive axle as much as possible and the method that do not reduce the total quantity of bridge is implemented.6 * 2 load-carrying vehicles and 6 * 2 tractor trucks as present more common assembling dual rotation bridge single drive axle.Turn to propons and a drive axle is changed to one, load-carrying capacity weakens greatly, and this is unwilling again to accept for the vehicle user.For this reason, people begin again to consider on the basis of former pair of back axle balance suspension structure one of them drive system in the former drive axle to be removed, but bearing system keeps to increase its load-carrying capacity, after this scheme change, former pair of rear-axle drive become single rear-axle drive, and the load of bearing respectively on two bridges does not change, but it is on the low side that load in use often will take place on the drive axle, thereby cause the earth-grasping force deficiency of drive system, climb the phenomenon that does not get on and happen occasionally.

Summary of the invention

Can to satisfy load bearing requirements in order solving, to provide the good earth-grasping force of drive system to guarantee the problem of cruising climbing demand again, the utility model provides a kind of asymmetric equalizing-suspension device that is applicable to heavy duty truck.

Concrete structural development technical scheme is:

The asymmetric equalizing-suspension device that is applicable to heavy duty truck comprises two rear leaf spring assemblies that are connected between vehicle frame and the balance shaft, rear leaf spring assembly two ends are supported on respectively on jackshaft and the back axle, the rear leaf spring assembly comprises rear leaf spring and leaf spring bracket, the leaf spring bracket is positioned at balance shaft two upper lateral parts, and rear leaf spring is positioned at the leaf spring bracket; Upper thrust rod and back upper thrust rod before the top of jackshaft and back axle is being connected respectively, preceding upper thrust rod is being connected the balance shaft middle upper portion respectively with the other end of back upper thrust rod; Lower thrust rod and back lower thrust rod before the bottom of jackshaft and back axle is being connected respectively, preceding lower thrust rod is being connected the balance shaft middle lower portion respectively with the other end of back lower thrust rod;

It is asymmetric trapezoidal that the steel spring of described rear leaf spring assembly is, and the ratio of its center bolt lock shaft apart from the distance L 1 of the jackshaft strong point and center bolt lock shaft apart from the distance L 2 of the back axle strong point is 4: 6; Upper thrust rod length and back upper thrust rod length ratio are 4: 6 before described; Lower thrust rod length and back lower thrust rod length ratio are 4: 6 before described.

Useful technique effect of the present utility model is mainly reflected in following two aspects:

The one,, the suspension system after the improvement can guarantee that Full Vehicle System under the total unmodified situation of bridge, makes the load-carrying properties of car load obviously not reduce in the drive system of cancelling a bridge.

The 2nd,, suspension system after the improvement can guarantee running into uneven road surface especially when going up a slope when vehicle, the propulsive effort that drive axle offers car load can guarantee that vehicle can climb up the gradient of national legislation regulation, and guarantees that the performance of earth-grasping force deficiencies such as skidding can not appear in the drive axle tire.

Effectively reduce the required pol loss of vehicle operating by improvement in a word, make the climbing tractive performance of car load significantly not weaken simultaneously, make the dynamic property of vehicle and economy significantly improve the asymmetric balance suspension of heavy duty truck.

Description of drawings

Fig. 1 is the utility model structural representation,

Fig. 2 is the birds-eye view of Fig. 1,

Fig. 3 is the rear leaf spring structural representation.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is further described by embodiment.

Embodiment:

Referring to Fig. 1 and Fig. 2, be applicable to that the asymmetric equalizing-suspension device of heavy duty truck comprises two rear leaf spring assemblies 1 that are connected between vehicle frame 9 and the balance shaft 5, rear leaf spring assembly 1 two ends are supported on respectively on jackshaft 3 and the back axle 7; Upper thrust rod 2 and back upper thrust rod 8 before the top of jackshaft 3 and back axle 7 is being connected respectively, preceding upper thrust rod 2 is being connected balance shaft 5 middle upper portion respectively with the other end of back upper thrust rod 8; Lower thrust rod 4 and back lower thrust rod 6 before the bottom of jackshaft 3 and back axle 7 is being connected respectively, preceding lower thrust rod 4 is being connected balance shaft 5 middle lower portion respectively with the other end of back lower thrust rod 6.It is asymmetric trapezoidal that the steel spring of rear leaf spring assembly 1 is, and sees Fig. 3, and the ratio of its center bolt lock shaft 10 apart from the distance L 1 of the jackshaft strong point 11 and center bolt lock shaft 10 apart from the distance L 2 of the back axle strong point 12 is 4: 6; Preceding upper thrust rod 2 length and back upper thrust rod 8 length ratios are 4: 6; Preceding lower thrust rod 4 length and back lower thrust rod 6 length ratios are 4: 6.

The propulsive effort of jackshaft 3 passes to vehicle frame 9 and balance shaft 5 by preceding upper thrust rod 2 and preceding lower thrust rod 4, thereby realize driving to car load, because the rear leaf spring assembly is asymmetric to be carried on jackshaft 3 and the back axle 7, the jackshaft strong point 11 and the back axle strong point 12 are 4: 6 apart from center bolt lock shaft 10 length ratio, thereby cause that the bearing capacity distribution ratio is 6: 4 on jackshaft 3 and the back axle 7, load on the jackshaft 3 (drive axle) has obtained the actv. enhancing, has promptly increased the vehicle earth-grasping force of drive axle in the process of moving.

Claims (1)

1. be applicable to the asymmetric equalizing-suspension device of heavy duty truck, comprise two rear leaf spring assemblies that are connected between vehicle frame and the balance shaft, rear leaf spring assembly two ends are supported on respectively on jackshaft and the back axle, the rear leaf spring assembly comprises rear leaf spring and leaf spring bracket, the leaf spring bracket is positioned at balance shaft two upper lateral parts, and rear leaf spring is positioned at the leaf spring bracket; Upper thrust rod and back upper thrust rod before the top of jackshaft and back axle is being connected respectively, preceding upper thrust rod is being connected the balance shaft middle upper portion respectively with the other end of back upper thrust rod; Lower thrust rod and back lower thrust rod before the bottom of jackshaft and back axle is being connected respectively, preceding lower thrust rod is being connected the balance shaft middle lower portion respectively with the other end of back lower thrust rod, it is characterized in that:

It is asymmetric trapezoidal that the steel spring of described rear leaf spring assembly is, and the ratio of its center bolt lock shaft apart from the distance L 1 of the jackshaft strong point and center bolt lock shaft apart from the distance L 2 of the back axle strong point is 4: 6; Upper thrust rod length and back upper thrust rod length ratio are 4: 6 before described; Lower thrust rod length and back lower thrust rod length ratio are 4: 6 before described.

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