Car suspension device

Abstract

The invention belongs to the field of highway transportation, and particularly relates to a car suspension device. The car suspension device comprises a first plate spring, a second plate spring, a support seat, a front axle, an intermediate axle, a rear axle, a first support and a second support; the first plate spring and the second plate spring are arranged in a left-right horizontal mode; the front axle and the rear axle are hinged to the first plate spring and the second plate spring through the first support correspondingly; the intermediate axle is hinged to the first plate spring and the second plate spring through the second support; the second support comprises a mounting seat, two sliding pieces and an elastic piece, the mounting seat is fixedly connected with the intermediate axle, a horizontal slide groove is formed in the upper surface of the mounting seat, and the two sliding pieces can slide in the slide groove; the right end of the first plate spring and the left end of the second plate spring are hinged to the two sliding pieces correspondingly, the elastic piece is connected between the two sliding pieces, and the left end and the right end of the elastic piece are fixedly connected with the two sliding pieces correspondingly. The car suspension device can reduce friction and generated noise at the joint, and has good application effects.

Description

technical field [0001] The invention belongs to the field of road transportation, in particular to a vehicle suspension device. Background technique [0002] The semi-trailer suspension device is one of the main components of the semi-trailer. Its main function is to effectively, reasonably and firmly connect the moving parts of the semi-trailer axle with the semi-trailer beam. A Chinese patent whose application number is 2005101289753 in the prior art discloses a chassis suspension device and a semi-trailer with the suspension device. The technical solution includes a front spring support, a middle spring support and a rear spring support, and the front spring support and Axle shaft tubes and leaf springs are arranged between the middle spring brackets, and between the middle spring brackets and the rear spring brackets. The leaf springs are located under the axle shaft tubes; Below, the tension rod is located above the side of the leaf spring. This technical solution redu...

AI Technical Summary

Problems solved by technology

[0005] 1. If figure 2 As shown, the leaf spring 5 and the leaf spring support 7 are connected by contact, so that the leaf spring 5 shakes in the leaf spring support 7 to cause relatively large noise, and there is a dry connection between the leaf spring 5 and the leaf spring support 7. Friction, on the one hand, will produce noise, on the other hand, the leaf spring 5 and the leaf spring bracket 7 will be worn, making the leaf spring bracket 7 easy to damage and cause a safety accident

[0006] 2. From the perspective of force analysis, when all tires are suspended in the air at the same time, the height of the middle axle will be higher than the height of the front and rear axles under the action of gravity, which makes the gravity potential energy of the middle axle larger. When the tires land , the tires on the front and rear axles will fall to the ground first but will not bear a large supporting force. Only when the tires on the three axles fall to the ground at the same time, the leaf springs will play a supporting role. High, so that the gravitational potential energy of the middle bridge is greater, so that the impact force on the leaf spring is greater, which is easy to cause spring breakage and tire blowout

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