CS243755B1 - Gear profile measuring device for gears - Google Patents

Abstract

The device solves the problem of measuring deviations in the shape and position of the tooth flank profile. It is especially suitable in the case of large gears with a diameter of over 500 mm. The essence lies in the transformation of the coordinates of the gear profile from a coordinate system tied to the axis of rotation of the gear into a coordinate system created on the tangent to the basic gear circle, on which the measurement is performed by a device consisting of a basic ruler (1), on which an adjustable roller (2) is placed and a rotary pin with an angle measuring device (3), around which a radius ruler (4) rotates, on which an adjustable linear measuring device (5) is located.

Description

243755

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the measurement of deviations in the shape and position of toothed tooth profiles.

The prior art tooth flank measurement devices are based on the fact that the mechanism implements the required geometry of the profiles and thereafter, with the aid of suitable sensors, the deviations of the actual tooth flank profiles are measured.

The mechanisms of such devices must be very precise, and so their production is technically demanding, laborious and ultimately expensive, which is evident when it comes to measuring large gears. Furthermore, it is difficult to handle such large wheels in such devices.

These drawbacks are eliminated by the subject matter of the present invention, which consists of a base ruler on one side of which is a roll which is adjustable and, on the other hand, a turntable with an angular measuring member with a radius ruler attached thereto, on which a linear measuring element is positioned .

The higher effect of the present invention is that the complicated mechanism implementing the required geometrical design is not required, thereby making the production of the teeth profiling device, in particular on toothed wheels with a diameter above 500 mm, not essential.

1 is a schematic representation of a particular embodiment of the gear profile measuring device, and FIG. 2 is a graphical representation of the geometrical principle of measuring the gear.

The gear-side profile measuring device schematically shown in FIG. 1 consists of a base 1, on which a roller 2 and a pivot pin with an angular measuring member 3, with which a radius ruler 4 is connected, on which is a linear measuring member 5.

The function of the gear teeth measuring device according to fig.

The roller 2 with the diameter d allowing it to contact the flanks of the teeth of the wheel to be measured, to the base circle 1, is placed at a distance re from the center of the pivot pin with the angular measuring member 3, theoretically valid r2 = Rsin where R is the radius of the spin circle - the angle of engagement of the measured gear. The base ruler 1 and the radius ruler 4 are aligned in a straight line and the linear measuring member is adjusted to show the deviations from the r 1 value for which η = Γ 2.

The roller 2 is inserted into the tooth gap of the measured wheel and rotates about the center of the roller 2d until the tip point is detected on the linear measuring member 5 and in this position the tooth flank profile measuring device is rotated about the center of the roller 2 by the radius ruler 4. the wheels on the gear wheel by means of the device not shown in FIG.

The measurement of the tooth flank profile is performed by turning the radius ruler 4 around the center S of the pivoting pin 3 to determine the linear distance of the deviation of the actual distance of the tooth profile points rs from the circle with the set radius ri, where = rs —Q

and thereafter, the deviations of the actual tooth profile from the required tooth profile from the required tooth profile P p = - rl where rt are the deviations of the circle with the set π radius from the desired boz profile.

The geometric principle of calculating the deviations rije is justified by oibr. 2 by defining the necessity of positioning the base plate 2 in the direction of the tangent to the base circle at point S, which is the center of the rotary pin of the angular measuring member 3 engaging the point and side of the tooth with an angle, which corresponds to the angle from the point Sp which is the center of the basic circle of the measured gear.

The higher effect of the tooth flank profiling device of the present invention is most pronounced when the angular measuring member 3 and the linear measuring member 5 are capable of cooperating with a self-acting computer, where the measurement re-evaluation calculations are programmed

The shape deformities of the actual profile of the teeth will cause uncertainty in securing the S-locomotive on the base circle of the measured o-wheel and thus some measurement errors, which will be eliminated by radommanning along the tooth width and circumference of the wheel.

Claims (2)

SUBJECT Device for measuring the tooth flank profile, characterized in that it comprises a basic ruler (1) on one side of which a roller (2) is displaceable and on the other side a pivot with an angular measuring member (3), to which the radius ruler is connected (4j) on which the linear measuring element (5) is adjustable. 2. Device according to claim 1, characterized in that on the basic ruler (1j) the roller (2) is fixed and the pivot with the angular measuring member (3) is adjustable.