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Design method of grease lubrication for spherical pair of automobile spherical hinge

A design method and technology of spherical pair, applied in mechanical equipment, vehicle components, steering mechanisms, etc., can solve the problems of large starting torque of automobile spherical joints, inability to meet requirements, and reduced durability and reliability, so as to reduce starting torque and optimize contact. Stress, the effect of improving durability

Active Publication Date: 2019-03-22
成都望锦汽车部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, for the design and development of automotive ball hinge products, there is no system design based on the characteristics of grease lubrication, which leads to a relatively large starting torque of the product automotive ball hinge and a decrease in durability and reliability.
With the competition in the market, the technical requirements for automotive ball joints are getting higher and higher, and the existing design methods can no longer meet the needs

Method used

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  • Design method of grease lubrication for spherical pair of automobile spherical hinge
  • Design method of grease lubrication for spherical pair of automobile spherical hinge
  • Design method of grease lubrication for spherical pair of automobile spherical hinge

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Embodiment

[0051] This embodiment provides a design method for the auxiliary grease lubrication of the spherical surface of the automobile spherical joint, please refer to figure 1 , the ball pin seat 2 is a POM injection molded part, the inner spherical model roughness Ra=0.1μm, the inner spherical surface roughness of the ball pin seat 2 is 1-2 grades lower than the model, so the inner spherical surface Ra of the ball pin seat 2 1 = 0.2μm, Rq 1 =1.25*0.2=0.25, h min = 1 μm.

[0052] substitute Get the root mean square deviation Rq of the profile of the spherical surface of ball pin 1 2 =0.22μm, further get ball pin 1 spherical surface Ra 2 =Rq 2 / 1.25=0.17 μm.

[0053] Establishing the Engineering Calculation Formula M of Spherical Joint Swing Moment f =μ·f·f v ·G·r, swing working moment M f Requires 2.0Nm, axial force G according to G=σ s S' calculation.

[0054] Among them, the ball pin sleeve 3 is made of 20# steel, and its σ s is 245MPa, and the outer diameter before r...

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Abstract

The invention provides a design method of grease lubrication for a spherical pair of an automobile spherical hinge, and belongs to the technical field of design and development of automobile sphericalhinge products. The design method of the grease lubrication for the spherical pair of the automobile spherical hinge is used for parameter design of the automobile spherical hinge. The automobile spherical hinge comprises a ball pin, a ball pin seat and spherical pair grease, and the spherical surface of a spherical head of the ball pin and the inner spherical surface of the ball pin seat form the spherical pair of the automobile spherical hinge. The design method comprises the steps that a, according to the thickness of a lubricating film, a mathematical model (please see the specification for the formula) of a grease lubricating state of the spherical pair of the automobile spherical hinge is established; b, the root mean square roughness of the spherical surface of the spherical head or the inner spherical surface of the ball pin seat is determined; and c, an engineering calculation formula M<f> is equal to [mu].f.f<v>.G.r of the shaking moment of the spherical pair is established,and the radius r of the spherical head is calculated. Through the design method of the grease lubrication for the spherical pair of the automobile spherical hinge, the starting torque of the automobile spherical hinge can be determined to be larger than the running torque according to the characteristics of the grease lubrication (thixotropy), the contact stress of the spherical pair of the automobile spherical hinge is optimized, the lubrication durability of the spherical hinge is improved, and the starting torque of the automobile spherical hinge is reduced.

Description

technical field [0001] The invention relates to the technical field of product design and development of ball joints, in particular to a design method for the spherical auxiliary grease lubrication of automobile ball joints. Background technique [0002] The structure of the automobile ball joint is as follows: figure 1 and figure 2 As shown, it mainly includes the ball pin 1, the ball pin seat 2, the ball pin sleeve 3 and the grease 4. The grease lubrication design of the automobile ball joint is related to the starting torque and durability reliability of the automobile ball joint. [0003] At present, for the design and development of automotive ball hinge products, there is no systematic design based on the characteristics of grease lubrication, which leads to a relatively large starting torque of the product automotive ball hinges and a decrease in durability and reliability. With the competition in the market, the technical requirements for automotive spherical join...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C11/06B62D7/18
CPCB62D7/18F16C11/068
Inventor 周后火
Owner 成都望锦汽车部件有限公司
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