Two-stage rigidity shock absorber, vehicle body front suspension and vehicle body rear suspension

Abstract

The invention discloses a two-stage rigidity shock absorber, a vehicle body front suspension and a vehicle body rear suspension, and relates to the technical field of automobile parts. The two-stage rigidity shock absorber comprises a damping spring, wherein a double-rigidity spring is arranged outside the damping spring in a sleeving manner; the double-rigidity spring is divided into a first rigidity section and a second rigidity section; and the screw pitch of the first rigidity section is smaller than that of the second rigidity section. The two-stage rigidity shock absorber can meet the shock absorption requirements of all-weather all-road-condition vehicles, the shock absorber and a cab are prevented from being damaged, the service lives of a piston and an oil seal of the shock absorber are prolonged, and the comfort of a driver is improved.

Description

technical field [0001] The invention relates to the technical field of auto parts, in particular to a two-stage rigidity shock absorber, a front mount of a vehicle body and a rear mount of a vehicle body. Background technique [0002] When the vehicle is driving on different road surfaces, especially on bad roads, the vibration caused by the uneven road surface will be transmitted to the cab, which will reduce the comfort of the occupants and even make them uncomfortable. Although my country's commercial vehicles are gradually adopting flat-floating or full-floating cab suspensions, due to the use of ordinary damping springs or ordinary springs and other first-level stiffness shock absorbing mechanisms for shock absorption, it has the following defects: There is only one stiffness design for the multi-level stiffness damping mechanism, so it cannot meet the damping requirements of the vehicle in all road conditions. For example, when the stiffness design of the primary stiff...

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Problems solved by technology

[0002] When the vehicle is driving on different road surfaces, especially on bad roads, the vibration caused by the uneven road surface will be transmitted to the cab, which will reduce the comfort of the passengers and even make them feel uncomfortable.

Although my country's commercial vehicles are gradually adopting flat-floating or full-floating cab suspensions, due to the use of ordinary damping springs or ordinary springs and other first-level stiffness shock absorbing mechanisms for shock absorption, it has the following defects: There is only one stiffness design for the multi-level stiffness damping mechanism, so it cannot meet the damping requirements of the vehicle in all road conditions

For example, when the stiffness design of the primary stiffness shock absorbing mechanism is small, the vehicle not only cannot prevent the vibration caused by the road from being transmitted to the cab, but also the excessive vibration will exceed the shock absorption limit of the primary stiffness shock absorbing mechanism, causing it to be in contact with the cab. Hard contact, causing damage to the damping mechanism and, in extreme cases, tearing of the cab

On the contrary, when the stiffness design of the shock absorbing mechanism with primary stiffness is relatively large, although the vibration of the cab caused by bad roads can be avoided, it cannot meet the shock absorption requirements when the road conditions are good, which reduces the comfort of the occupants.

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