Gearbox auxiliary suspension cushion assembly for heavy truck

Abstract

The invention provides a gearbox auxiliary suspension cushion assembly for a heavy truck. The gearbox auxiliary suspension cushion assembly comprises an elastic lining, a cross beam structure and a circular outer sleeve structure. By the adoption of the elastic lining structure, a power assembly has enough displacement in the radial direction of the elastic lining and is not prone to colliding with a rigid framework, the rigidity of an E-point rubber elastic body can be fully reduced, and a gearbox shell is protected; the cylindrical elastic lining structure is adopted, so that the rigidity of a rubber main spring can be effectively reduced, excessive displacement of an outer framework can be restrained in all directions, and the fatigue cracking problem of a rubber vulcanization structure is solved; and enough tolerance capability can be ensured, and no load effect is ensured in a static load working condition and a constant-speed driving working condition.

Description

technical field [0001] The invention belongs to the technical field of vehicle powertrain mounts, and in particular relates to a cushion assembly for auxiliary mounts of gearboxes for heavy-duty trucks. Background technique [0002] As a key component of the powertrain installation and integration, the powertrain mount plays an important role in the vehicle integration. The main functions of the powertrain mount include: First, the supporting function: to ensure that the powertrain is installed in the expected position; Second, the limit function: restrict the displacement of the powertrain to ensure that the displacement of the powertrain is within the expected range under any working conditions; third, the vibration isolation effect: reduce the vibration between the powertrain and the frame as much as possible Fourth, the noise reduction effect: reduce the energy transfer caused by the rigid connection. [0003] Such as figure 1 As shown, the suspension cushion assembly ...

AI Technical Summary

Problems solved by technology

The insufficient thickness of the effective rubber makes the rubber not have enough movement when it is subjected to a compressive load, and finally shows that the rubber elastic body stiffness is too large

It is not feasible to directly reduce the hardness of the rubber material on the basis of this structure to achieve a lower stiffness, because the thickness of the rubber material is too thin, and the change in stiffness caused by directly reducing the hardness of the rubber material is not obvious, but it leads to the resistance of the rubber. Decreased fatigue performance

[0008] In addition, the rubber vibration isolation unit has no limit design, and the outer skeleton and rubber elastomer vulcanized layer are prone to fatigue cracking

The existing technology also shows the problem of cracking of the vulcanized layer between the rubber elastic body and the metal outer frame. If the gearbox jumps vertically or laterally, the tensile load of the gearbox is transmitted on the rubber elastic body, and the rubber vibration isolation The unit has no hard limit design, which makes it unable to effectively suppress the beating of the gearbox. Long-term excessive stretching will cause fatigue and cracking of the vulcanized layer of the rubber and the outer frame

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