Large-stroke heavy-duty vehicle shock absorber piston rod double-guiding structure

Abstract

The invention discloses a large-stroke heavy-duty vehicle shock absorber piston rod double-guiding structure. The large-stroke heavy-duty vehicle shock absorber piston rod double-guiding structure comprises an oil seal surrounding a piston rod, a first guider and a piston. The first guider and the piston are sequentially disposed below the oil seal. A guiding isolating sleeve is disposed at the upper end of the oil seal. A second guider is further disposed at the upper end of the guiding isolating sleeve. The shape of the first guider is consistent with that of the second guider, and the size of the first guider is equal to that of the second guider. According to the large-stroke heavy-duty vehicle shock absorber piston rod double-guiding structure, by means of the design of arranging the two guiders at the upper end and the lower end of the oil seal, the guiding length is 3-4 times that of original single guiding, so that the guiding stability of the piston rod is substantially improved and meanwhile unilateral abrasion of the oil seal is avoided. Due to guiding length increase, the deflection amount of the piston rod is effectively reduced, lateral stress of the piston rod is reduced, and the piston rod is prevented from being bent due to too large external force.

Description

technical field [0001] The invention relates to a guide device of a shock absorber for automobiles, and more specifically relates to a double guide structure of a piston rod of a shock absorber of a large-stroke heavy-duty vehicle. Background technique [0002] The function of the guide in the automobile shock absorber is to ensure the reciprocating linear motion of the piston rod along the set direction. Many of the current heavy-duty models with large strokes still adopt the single-guide design. The single-guide has the following problems: firstly, the length of the single-guide is too short, and there is a fit gap between the guide hole and the piston rod. When the axial force acts, two adverse phenomena will occur. First, the fit gap at the oil seal increases, which will cause serious unilateral wear to the oil seal, resulting in failure of the oil seal; second, due to the short guide, the longer the stroke of the piston rod , the swing away from the end of the guide wi...

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: Aiming at the deficiencies of the existing technology, the applicant has designed a double-guide structure for the piston rod of the shock absorber of the large-stroke heavy-duty vehicle after many times of practice and improvement, mainly to solve the problem that the length of the guide is too short caused by the single guide on the large-stroke heavy-duty vehicle The problem of easy deformation of the piston rod caused by

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