Method for determining actual ball size of a ball cage type universal joint

Abstract

A kind of method for determining the actual ball size of a ball cage type universal coupling belongs to the technical field of ball cage type universal coupling design.The method is as follows: coupling parameter analysis;calculating the difference between the theoretical ball and the center of the ellipse and the difference between the actual ball and the center of the ellipse;calculating the actual ball center size.The present application combines mechanical expertise,analyzes the tangent of the elliptical orbit and the ball,according to the different situations of the inner planet wheel and the outer planet wheel,calculates the actual ball center size directly,avoids the repeated modeling work of three-dimensional model analysis in the prior art,significantly improves the measurement efficiency,enhances the universality of the method and expands the scope of application.

Description

TECHNICAL FIELD

[0001] The present application relates to a method for determining the actual steel ball size of a ball cage type universal coupling, belonging to the technical field of ball cage type universal coupling design. BACKGROUND

[0002] In the field of aerospace, the measurement of ball cage type universal couplings is of great importance, and the center size of the steel ball is one of the main measurement elements. However, in practical applications, due to the differences in design requirements and actual manufacturing process of the steel ball size, the originally designed steel ball center size often needs to be adjusted according to the actual steel ball size to ensure that the performance of the coupling meets the design requirements.

[0003] Currently, the commonly used method is three-dimensional simulation method, which involves constructing a three-dimensional model of the steel ball center and measuring the three-dimensional model by simulating the tangential change of the elliptical orbit to obtain the corresponding parameters. This method requires repeated modeling work according to different steel ball sizes, steel ball positions and major and minor axes of the elliptical orbit, which is tedious and inefficient. SUMMARY

[0004] To solve the problems in the background art, the present application provides a method for determining the actual steel ball size of a ball cage type universal coupling.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a method for determining the actual steel ball size of a ball cage type universal coupling, the method comprising the following steps:

[0006] S1: coupling parameter analysis:

[0007] Define the elliptical minor axis a, the elliptical major axis b, the theoretical steel ball radius r, the actual steel ball radius r1, the theoretical steel ball center size D, the elliptical center size D1, the actual steel ball center size D2, the difference m between the theoretical steel ball and the elliptical center, and the difference m1 between the actual steel ball and the elliptical center;

[0008] S2: calculate the difference m between the theoretical steel ball and the elliptical center and the difference m1 between the actual steel ball and the elliptical center;

[0009] Through the elliptic equation And the circle equation We can get:

[0010] (1)

[0011] (2)

[0012] S3: calculate the actual steel ball center size D2.

[0013] S301: calculate the actual steel ball center size for the inner star wheel of the coupling:

[0014] (3)

[0015] S302: Calculate the actual steel ball center size for the outer star wheel of the coupling:

[0016] (4)

[0017] Compared with the prior art, the beneficial effects of the present application are:

[0018] The present application combines mechanical professional knowledge, analyzes the tangency of the elliptical orbit and the steel ball, directly calculates the actual steel ball center size according to different situations of the inner star wheel and the outer star wheel, avoids the repeated modeling work of three-dimensional model analysis in the prior art, significantly improves the measurement efficiency, and at the same time enhances the universality of the method and expands the application range. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of an inner star wheel of a ball cage type universal coupling;

[0020] Figure 2 is a structural schematic diagram of an outer star wheel of a ball cage type universal coupling. DETAILED DESCRIPTION

[0021] The technical solutions in the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0022] A method for determining the actual steel ball size of a ball cage type universal coupling, the method comprising the following steps:

[0023] S1: Coupling parameter analysis:

[0024] The parameter calculation is based on Figure 1 This figure reflects that the position of the steel ball and the elliptical orbit is in tangential relationship, defines the elliptical minor axis a, the elliptical major axis b, the theoretical steel ball radius r, the actual steel ball radius r1, the theoretical steel ball center size D, the elliptical center size D1, the actual steel ball center size D2, the difference m between the theoretical steel ball and the elliptical center, and the difference m1 between the actual steel ball and the elliptical center;

[0025] S2: Calculate the difference m between the theoretical steel ball and the elliptical center, and the difference m1 between the actual steel ball and the elliptical center;

[0026] Through the elliptical equation and the circular equation It can be obtained that:

[0027] (1)

[0028] (2)

[0029] S3: Calculate the actual center dimension D2 of the steel ball.

[0030] S301: Calculate the actual center dimension of the steel ball in the inner star wheel of the coupling:

[0031] (3)

[0032] S302: Calculate the actual center dimension of the steel ball for the outer star wheel of the coupling:

[0033] (4).

[0034] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for determining the actual steel ball size of a ball cage universal coupling, characterized in that: The method includes the following steps: S1: Coupling parameter analysis: Define the minor semi-axis a, the major semi-axis b, the theoretical steel ball radius r, the actual steel ball radius r1, the theoretical steel ball center dimension D, the ellipse center dimension D1, the actual steel ball center dimension D2, the difference between the theoretical steel ball and the ellipse center m, and the difference between the actual steel ball and the ellipse center m1; S2: Calculate the theoretical difference m between the center of the steel ball and the center of the ellipse and the actual difference m1 between the center of the steel ball and the ellipse; The calculation process described in S2 is as follows: Using the equation of an ellipse and the equation of a circle We can obtain: （1） （2） S3: Calculate the actual center dimension D2 of the steel ball; S3 includes the following steps: S301: Calculate the actual center dimension of the steel ball in the inner star wheel of the coupling: （3） S302: Calculate the actual center dimension of the steel ball for the outer star wheel of the coupling: （4）。

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