JPH045931B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to a gear meshing test device, and more specifically, a gear meshing test device that holds both ends of a shaft gear with a center hole and tests meshing with a standard master gear. This invention relates to a gear measuring device that measures the outer diameter of each journal and corrects the measurement position.

(b) Prior art and problems First, a configuration diagram of a conventional gear measuring device is shown in Fig. 2.

In Fig. 2, 1 is the gear, 2 and 3 are the center, 4 is the master gear, 5 is the drive motor, 6 is the gear head, 7 is the gear unit, 8 is the proximity switch, 9A is the detector, 9B is the amplifier, and 9C is the arithmetic unit. It is.

Gear 1 of the object to be measured has both ends centered at center 2 and center 3.
, and is rotated by meshing with the standard master gear 4. The rotational speed of the drive motor 5 and gear head 6 for deceleration is approximately 0.1 to 0.0 seconds per tooth.

When the master gear 4 rotates, it meshes with the gear 1, and the gear unit 7 changes depending on the meshing situation. This is detected by the detector 9A, and the amplifier 9B,
Measured values of center distance, tooth runout, and dents are obtained through the calculator 9C.

The proximity switch 8 is used to obtain the timing per tooth when performing calculations.

Next, the output signal waveform diagram of the detector 9A in FIG. 2 is shown in FIG.
and the dent N are shown in the following formula.

Center-to-center distance (average value) D= _A=o 〓 ^A=1 A/n...(1) Here, n is the number of teeth of the gear to be measured.

Teeth runout R = Amax - Amin ... (2) N = Nmax ... (3) The problem in Figures 2 and 3 is that the measured values are based on the center hole, so the accuracy of the center hole is poor, If dirt or dust adheres to the centers 2 and 3, measurement errors will occur.

Furthermore, since the gear 1 is assembled and rotated with reference to the journal axis, using a temporary center hole reference is not practical and cannot be said to be a highly accurate measurement.

(C) Purpose of the Invention This invention solves the problems of the prior art by changing the measured value from the center reference to the journal reference, and also corrects the outer diameter even if the journal outer diameter changes.
The purpose is to measure the distance between centers based on the journal axis, tooth runout, and dents.

(d) Embodiment of the Invention First, FIG. 1 shows a configuration diagram of an embodiment of the invention.

Reference numerals 11 and 12 in FIG. 1 are detectors, and the other peripheral configurations are the same as in FIG. 2.

In FIG. 1, a detector 11 is brought into contact with the journal 1A of the gear 1, and a detector 12 is brought into contact with the journal 1B.

The distance from the center of gear 1P of gear 1 to detector 11 is L1, and the distance from the center of gear 1P to detector 1 is L1.
The distance to 2 is L2.

Here, regarding the true tooth runout Ro and the dent No., using the corrected calculation formula, the movement Ao of the detector 9A based on journal 15 is: Ao=G3-{(1-K)G1+KG2}...(4 ) However, K=L1/(L1+L2), and tooth runout Ro=Aomax−Aomin ……(5) No=Nomax ……(6).

G1 is position data of detector 11, G2 is detector 1
The position data of No. 2 and G3 are the position data of the detector 9A.

In addition, the distance between the centers is usually calculated by arranging the detector 13 and the detector 14 as shown in Fig. 4, Do=G3-[(G1-G2)/2-K{(G1-G4)/2-(G2 −G5)/2)}] …(7) K=L1/(L1+L2) …(8) The average value can be calculated using the following formula.

The detectors 13 and 14 can be substituted for G1 and G2 by calculation.

Here, G4 is the position data of the detector 13,
G5 is position data of the detector 14.

To calculate the center-to-center distance D when detectors 13 and 14 are removed, use equation (4) to calculate the average value of the dimensions from the contact point of detector 9A to journal 15 in Figure 1, and then calculate the calculated value and journal. What is necessary is to add the dimension d from 15 to the center of the journal axis.

The dimension d from the journal 15 to the center of the journal axis is determined by data for the detectors 11 and 12 at position 21 (G1, G2) and position 22 (G1, G2) rotated 180 degrees from position 21, as shown in Figure 5. Then, d=[(G1-G4)/2-K{(G1-G4)/2-(G2-G5)}]...(9).

(e) Effect of the invention According to this invention, there are the following effects.

(a) The machining accuracy of both center holes is poor.

(b) Since it is based on the journal axis, it is possible to evaluate it in the same way as the actual engagement.

(c) The amount of runout of the center rotation mechanism is not affected by the measured value.

(d) Only half the amount of detectors required for correction is required.

[Brief explanation of drawings]

Figure 1 is a configuration diagram of an embodiment according to this invention, Figure 2
3 is a diagram of the output signal waveform of the detector 9A in FIG. 2, FIG. 4 is a diagram of the configuration of another embodiment of this invention, and FIG. 5 is an explanatory diagram of FIG. 4. . 1... Gear, 2... Center, 3... Center, 4
... Master gear, 5 ... Drive motor, 6 ... Gear head, 7 ... Gear unit, 8 ... Proximity switch, 9A ... Detector, 9B ... Amplifier, 9C ...
Arithmetic unit, 11...detector, 12...detector.

Claims (1)

[Scope of Claims] 1. In a gear measuring device that holds both ends of a shaft gear having a first journal at one end and a second journal at the other end and performs a meshing test with a reference master gear, the first journal a first detector is applied to the terminal, and a second detector is applied to the second journal;
A first detector and a second detector measure position data of a first surface of the shaft gear and a second surface opposite to the first surface, and correct the measured value of the shaft gear from the position data. Gear measuring device.