Powertrain anti-torsion tie rod structure

Abstract

The invention discloses a torsion-resistant pull rod structure of a power assembly. The torsion-resistant pull rod structure of the power assembly comprises a torsion-resistant pull rod framework, wherein the two ends of the torsion-resistant pull rod framework are respectively provided with a large bushing and a small bushing; the large bushing comprises a large bushing rubber ring and a large bushing liner; the large bushing rubber ring is provided with a forward gear rubber impact block and a reverse gear rubber impact block; the ends of the forward gear rubber impact block and the reversegear rubber impact block are tapered; the two sides of the forward gear rubber impact block are provided with forward gear impact block buffer grooves; and two sides of the reverse gear rubber impactblock are provided with reverse gear impact block buffer grooves. According to the invention, the rigidity curves of an initial section and an end section in an acceleration process of a three-gear area are smooth, and abrupt change of rigidity does not exist, so that the vibration strength is reduced, and the NVH performance of a whole vehicle is improved; and a special gasket is arranged betweenthe large bushing liner and a front auxiliary frame assembly, and a small bushing rubber ring is provided with a limiting boss and a buffer groove, so that the connection stability of the two ends ofa torsion-resistant pull rod is enhanced.

Description

Technical field [0001] The invention belongs to the technical field of powertrain suspension systems, and specifically refers to a torsion resistant pull rod structure of a powertrain. Background technique [0002] The main function of the anti-torsion mount in the automotive powertrain is to limit the torsional displacement of the powertrain and isolate the torsional vibration of the powertrain. The torsion-resistant suspension is usually composed of a torsion-resistant rod and a torsion-resistant bracket. The end of the torsion-resistant rod near the large bushing is usually connected with the front bracket by bolts. The anti-torsion rod can effectively reduce the vibration intensity transmitted from the powertrain end to the interior of the car. [0003] Chinese patent CN106314116A discloses a torsion resistant rod. The forward stop rubber limit block of the torsion resistant rod has a certain gap with the inner tube of the large bushing and the outer tube of the large bushing,...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN106314116A discloses a torsion-resistant pull rod. There is a certain gap between the forward stop rubber stopper of the torsion-resistant tie rod and the inner tube of the large bush and the outer tube of the large bush. The limit surface on the inner tube of the large bush is fully fitted, so that when the rubber limit block contacts the inner tube of the large bush, the contact area increases sharply within a small range of deformation, so in the stiffness curve first There is a sudden change in stiffness at the intersection of the two ends of the second linear segment B and the first linear segment A and the third linear segment C, which will cause the moment when the inner lining of the large bush contacts the rubber of the impact block during the acceleration process, There is a sudden change in stiffness, which will produce a slight shock vibration and affect the NVH performance during acceleration

[0004] In addition, the engine torque of passenger cars continues to increase, resulting in an increasing load on the torsion tie rods. At present, the inner core of the torsion tie rods is considered to meet the special-shaped structure of the core and meet the requirements of weight reduction. The aluminum material is used, because the texture of the aluminum material is soft and the surface friction coefficient is small, resulting in a small fastening force. It is easy to slip and loosen relative to the front bracket, resulting in abnormal noise, loose connection and other faults, which seriously affect the performance of the torsion rod

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