JPS6154161B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for inspecting the accuracy of a hypoid gear, and more particularly to a method for measuring eccentricity error and pitch error of a hypoid gear.

Hypoid gears are gears that mesh with each other on axes that are 90 degrees apart and do not intersect, but when testing the accuracy of such hypoid gears, it is necessary to measure eccentricity errors and pitch errors. Here, the eccentricity error is the amount of deviation between the rotation center of the gear and the machining center, and the pitch error is a value that indicates whether or not there are teeth at equal intervals on the pitch cone. Refers to the error in tooth spacing.

Conventionally, the eccentricity error and pitch error of hypoid gears have been measured separately using different measuring machines, as shown in FIGS. 3 and 4, because the measurement methods are different. That is,
Figure 3 shows the conventional pitch error measurement method.
1 is a hypoid gear, 2 is a stator, and 3 and 4 are movable measuring elements. While rotating the hypoid gear 1 in the direction of the arrow, touch the mountain side wall of one tooth 5 to the stator 2.
The movable probes 3 and 4 are brought into contact with the mountain side walls of the tooth 5 and the adjacent tooth 5', respectively, and the distance between the probes 3 and 4, that is, the pitch between adjacent teeth, is detected by the detector 6. It is detected by a computer and read by a computer (not shown) or the like. Further, FIG. 4 shows a conventional pitch error measuring method, in which the mountain side wall of one tooth 5 is brought into contact with the stator 7 while the hypoid gear 1 is similarly rotated in the direction of the arrow. Next, the movable probe 8 is brought into contact with the mountain side wall of the tooth 5'' that is diametrically opposed to the tooth 5, the position of the probe 8 is detected by the detector 9, and the eccentricity e is measured by a computer (not shown). ), etc.

According to such conventional methods, it is necessary to measure the pitch error and eccentricity error using separate measuring machines, which requires time to change the setup, and it takes time to measure the accuracy of the hypoid gear. It required man-hours.

An object of the present invention is to provide a measurement method that simultaneously measures eccentricity error and pitch error in hypoid gear accuracy measurement, thereby reducing the time and man-hours required for changing the setup of a measuring machine.

Next, the present invention will be explained in detail with reference to FIGS. 1 and 2. FIG. 1 is a schematic view showing a method for simultaneously measuring eccentricity error and pitch error of a hypoid gear according to the present invention, and FIG. 2 is a perspective view of the measuring device. As shown in FIG. 2, the hypoid gear 1 to be measured is placed on a table 10 of a measuring machine so as to be rotatable around a predetermined axis. For this purpose, there are three rotating bodies 11 on the table 10, and the center hole 1a of the hypoid gear 1 is
1, the hypoid gear 1 is rotatably supported on the table 10.
A stator 12 is provided on the table 10, and while rotating the hypoid gear 10 in the direction of the arrow,
The mountain side wall portion of one tooth 5 is brought into contact with the stator 12. Next, a tooth 5' diametrically opposite that tooth 5
The movable measuring element 13 is mounted on the mountain side wall of the tooth 5'.
Another movable measuring element 14 is brought into contact with the mountain side wall of the tooth 5'' adjacent to the stator 12.The mountain side wall of the tooth 5 that contacts the stator 12 and the movable measuring element 13, 14
The mountain side wall portions of the teeth 5', 5'' which respectively contact are on the same side with respect to the rotational direction of the hypoid gear 1.
In this way, the eccentricity error and pitch error of the hypoid gear 1 can be measured at the same time by detecting the position and interval of the probes 13 and 14.

In the embodiments shown in FIGS. 1 and 2, the movable measuring element 1
3 is a movable part 15a of the plunger type position detector 15
The main body 15 of this detector 15
b is carried by a movable measuring element 14, and furthermore, this measuring element 14 is attached to the movable part 16 of a plunger type position detector 16 whose main body part 16b is fixed on the table 10.
It is supported on a. The detectors 15 and 16 are connected to a computer (not shown) through cables 17 and 18.
etc., the eccentricity error e of the hypoid gear 1 and the pitch error between adjacent teeth can be automatically read, and can also be automatically recorded if necessary. In addition, the stator 12 and the measuring element 1
It is desirable that the positions where the teeth 3 and 14 contact the teeth 5, 5', and 5'' are on the pitch cone of the hypoid gear 1 and equidistant from the gear center. Although the pitch (1 pitch) error between teeth was measured, it is also possible to measure the pitch (2 pitch) error between adjacent teeth.

According to the present invention, in precision measurement of hypoid gears, eccentricity error and pitch error can be measured simultaneously with one measuring machine with a simple structure, which makes it possible to measure the eccentricity error and pitch error at the same time, compared to the case where they were measured separately as in the past. There is no need to replace it, which shortens measurement time and reduces the number of man-hours required for measurement.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the hypoid gear accuracy testing method of the present invention, FIG. 2 is a perspective view of the measuring machine,
FIG. 3 is a schematic diagram showing a conventional method for measuring the pitch error of a hypoid gear, and FIG. 4 is a schematic diagram showing a conventional method for measuring an eccentricity error of a hypoid gear. 1...hypoid gear, 5, 5', 5''...teeth,
12... Stator, 13, 14... Movable measuring element, 1
5,16...detector.

Claims (1)

[Claims] 1. A hypoid gear 1 is installed rotatably around a predetermined axis, the mountain side wall of one tooth 5 of the hypoid gear is brought into contact with the stator 12, and the mountain side wall of the tooth 5' diametrically opposed to the tooth 5 is brought into contact with the stator 12. One movable measuring element 13, 14 is brought into contact with the mountain side wall of the third tooth 5'' and another tooth 5'', respectively, and the mountain side wall of the three teeth 5, 5', 5'' are the same in the rotational direction of the hypoid gear. A precision inspection method for a hypoid gear, which detects the position and interval of the two movable contact points and measures the eccentric error e and pitch error of the hypoid gear.