Rubber bushing type engine suspension

Abstract

The invention relates to a rubber bushing type engine suspension which comprises a support provided with a sleeve and a rubber bushing assembly matched with the sleeve on the support. The rubber bushing assembly of the suspension is composed of an outer casing pipe, an inner casing pipe and a vulcanized rubber component arranged between the outer casing pipe and the inner casing pipe, and the outer casing pipe is provided with a square hole; the vulcanized rubber component comprises an upper limiting structure connected with an outer round rubber ring and a lower limiting structure connected with an inner round rubber ring, the inner wall of the outer round rubber ring is tightly attached to the inner wall of the outer casing pipe, and the outer wall of the inner casing pipe is sleeved with the inner round rubber ring; the upper limiting structure is a square boss and extends out of the square hole in the outer casing pipe; the lower limiting structure is an arc-shaped boss and corresponds/makes contact with the lower face of the upper limiting structure; and the rubber bushing type engine suspension further comprises a herringbone-shaped rubber spring. When the rubber bushing type engine suspension is in a free state, a rubber bushing is in a pre-pressed state, the distance (namely a +Z-direction linear segment) between the upper limiting structure and the lower limiting structure of the rubber bushing is smaller than zero, thus, the suspension fatigue performance is improved, and the suspension reliability is improved.

Description

technical field [0001] The invention relates to an engine accessory, in particular to an engine mount with a preload function and a rubber bushing. Background technique [0002] Engine mount refers to the elastic body connected between the powertrain and the body. It has the functions of support, limit and vibration reduction. It is the most important vibration isolation element. The quality of its structure has a great influence on the ride comfort Impact. The main structural forms of engine mounts include the following three types: one is the compression type, in which rubber is vulcanized onto the upper and lower sheet metals. The compression type mount has relatively small volume, relatively simple structure, and high compression stiffness, but the shear Lower stiffness. The other is the shear type, in which the rubber is vulcanized on the casing, which mainly bears the shear force. The shear type mount can provide greater shear stiffness, but the compression stiffness...

AI Technical Summary

Problems solved by technology

However, due to the limitations of the vulcanization process, the vertical direction of the suspension (+Z linear segment) cannot be made too small, resulting in too large jumping distance of the rubber main spring, and the excessive tensile displacement, resulting in fatigue and reliability of the rubber main spring decreased sex

In order to reduce the spacing, some increase the necking process to reduce the +Z linear section, but increasing the necking process can only reduce the +Z linear section by about 1-2mm, which cannot fundamentally solve the problem, and will increase cost

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