JPS59116524A - Automatic gear selecting machine with double master gears - Google Patents

Abstract

PURPOSE:To perform the measurement of only a dent and selection readily, accurately, and instantaneously, and to make it possible to mount a noiseless speed change gear on an automobile, by supporting a plurality of master gears by floating rotary shafts, respectively, and measuring the amount of change in the distance between the center of a gear to be measured and the center of the respective master gear with respect to the rotation. CONSTITUTION:The face width of a master gear 1, which is machined highly accurately for eccentricity and size measurement (runout, error in 1 pitch engagement, and backlash) is shorter than the face width of a gear to be measured 3 by about 10%, and two teeth are intermeshed. The lower side of a shaft 4 of the master gear 1 is connected to a driving motor 6 through a universal coupling 5. The rotation is transmitted to the master gear 1. The gear to be measured 3 is also rotated by the intermesh. A supporting table 7 sends the amount of change in position to a measuring and operating part through a measuring part 8. The electric signals are processed and selected. The supporting table 7 and the measuring part 8 are supported on a base table 16 so that they can be moved without resistance along the line connecting the master gear and the center of the gear to be measured. The change in the distance between the gear to be measured and the master gear is read by an electric micrometer.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention aims to reduce the dents, tooth groove runout, one-pitch meshing error, and overball diameter (backlash) of the gear to be measured by meshing two tooth flanks with the master gear. This invention relates to an automatic gear sorting machine that measures the amount of change in center-to-center distance with respect to rotation, compares this with a set value, and instantly sorts out whether a gear to be measured is good or bad.

Conventionally, gears, especially gears used in automobile transmissions, have been required to have durability and noise prevention. Among them, noise has been reduced by (1) dents, (2) tooth groove deflection, and (3) 1
Hit engagement error, (4) backlash (Qver
For this purpose, a two-face meshing tester has been improved, and an automatic gear sorting machine is used that compares the measured value with the set value and determines the quality of the gear being measured. was. That is, the one shown in Fig. 1 is a conventional gear automatic sorting machine, and the i++ constant gear (B)
The master gear (2 teeth 1 <, 7 gears) is fitted onto the shaft fixed to the movable support base (C), and meshed with the highly precisely made master gear holder without backlash.
When the gear (B) is rotated, the gear to be measured is floating, so the above-mentioned error in the gear to be measured (B) can be detected by the measurement unit (to) as a change in the distance between the centers of both gears. Using sampling pulses at regular intervals generated by the timer mechanism and timing pulses generated for each tooth of the master gear, the value of the electric micrometer indicating the above fluctuation amount is sent to the measuring device every time the sampling pulse is generated. After importing the data, measure the maximum value and minimum value in an arbitrary interval, perform the necessary calculations on these through a low-pass filter and a bypass filter, and then compare them with the set values to determine whether the gear is good or not. This is the judgment part that organizes and compares with the setting 1st shift (tolerable value) and makes a judgment.

However, in the above-mentioned conventional gear automatic sorting machine,
When the master gear and the gear to be measured are engaged, there is a drawback that dents in non-contact parts cannot be detected, and in addition, the gears of automatic military transmissions are mostly carburized and quenched or carbonitrided as heat treatment. As a result, sagging occurs at both ends in the lead direction after heat treatment, and this becomes a non-contact area during meshing, but there are also dents on this area, that is, the tooth tips and both ends (sharp edges in percent). This is likely to occur, and therefore detection is also insufficient. The dents in this area cannot be detected even by a gear speeder, and can only be detected after the transmission is assembled and torque is applied, so it is essential to detect the dents during sorting. In addition, since all conditions were measured using one master gear, the dents converged in the form of noise from other requirements, making the sub-scales of other conditions inaccurate.

This clarification is intended to eliminate the drawbacks of the conventional automatic gear sorting machine, and fixes the support base of the floating gear to be measured in the conventional automatic gear sorting machine, while allowing the rotation thu of each master gear to float. In addition to detecting the center distance between the temporary measurement gear and the master gear on the rotating shaft side of the master gear, we also made it possible to detect only one of the dents.
The other master gear is used to detect backlash, tooth space runout, one-pitch meshing error, etc., and it is possible to determine whether the overall gear is good or bad.

To explain this in more detail, in order to eliminate the drawbacks of the conventional method described above, 1. The shaft of the gear to be measured is made a fixed shaft.

2. -Float the rotation axis of the rx metal layer.

3. For one of the master gears, make the torsion angle weaker or use a reverse follow lead (approximately 1'30" to 2'30") so that it can contact the tooth tips and both ends of the gear to be measured. , below the tooth tip, D (to ~ 20μ).

4. One of the master gears mentioned above is longer (about 20%) than m rtJ of the gear to be measured, and the teeth rjJ of the other master gears are longer than those of the gear to be measured so as not to come into contact with both ends. (approximately 10%).

The configuration is as described above.

To explain this using the example shown on the first page, FIG.
One embodiment of this invention is shown.
As mentioned above, the tooth width is about 10% shorter than that of the gear to be measured (3), so that two-face meshing is achieved. (4) is the master gear (1)
shaft, and the lower part is connected to the drive motor (6) via the universal joint (5).
), the rotation is transmitted to the master gear (1), and the gear to be measured (3) also rotates due to meshing. (If all the master gears are in mesh with the gear to be measured (3), there is no need for all axes to have drive motors. If one of them is driven, it is a light beam.) (7) is shaft(
4), which is fitted with a support base (7) that measures the amount of positional fluctuation of the force through a measurement unit (8), and a calculation unit (not shown, the same as the conventional one). ), the temperature signal is processed and sorted.Support stand (7)
For example, the gear to be measured is supported by rollers on the base (161) so that it can be moved together with the measurement unit (8) on the base (161) on a line connecting the centers of the master gear and the gear to be measured without resistance. The change in the distance between the shafts of the master gear and the master gear is read using an electric micrometer and is accurately transmitted to the calculation unit. This is how it should be done.O
Q is a measuring pressure spacer, and 0υ is an air-hydro cylinder. (2) is a master gear that is also finished with crystal precision so that only the reeds and dents can be detected particularly well.
Make it about 20q6 longer than the tooth width of the gear to be measured (3), and make its torsion angle t'so"-=2' than that of the gear to be measured.
Either make it weaker by about 3o" or make it concave so that it comes into close contact with the lead surface of the fixed gear, that is, make it in a shape that can contact both ends of the tooth tip as a reverse follow lead. (One force is the above-mentioned force. This shaft fits the master gear (2), and like the other master gear shafts (4), it has a universal joint (5).
) to the drive motor (6). The support stand (1st floor and the measurement unit (12J) are the support stand (the measurement unit for force)
With the same configuration as 8), it is supported without resistance on the line between the master gear and the gear to be measured on the base 1lij, and the fluctuation in the distance of the axis 1ij due to the meshing of the gear to be measured and the master gear is accurately read with an electric micro. It is designed to be transmitted to the calculation section. αω is the axis of the gear to be measured (3), to which the gear to be measured (3) is fitted and rotated while being supported by a support stand 0■ fixed to the base (1υ).

Figure 3 shows the relationship between the deflection angle and the tooth width, and (b) shows a schematic diagram of the dent master gear (2) that weakens the deflection angle.
K. The other master gear (1) is shown in (A). (c) is for the gear to be measured and is 6! ? , L indicates the length of the tooth width. (Incorporated) indicates the length of the tooth width of the master gear for measurement (1) other than the dents, and the margin indicates the tooth width of the master gear (2) for measuring the dents. As shown in Figure 3,
M<L<N. In addition, β° is the torsion angle, and the one that has a torsion angle such as S with respect to the gear to be measured is the other master gear (1), and the dent master gear (2) is slightly smaller than the above-mentioned torsion β0. This shows that the angle γ0 is weakened to α0.

Since this invention is configured as described above,
J constant gear is fitted to the shaft (4) of the support stand (7) fixed to the base (1f9), and the support stand (force 0 floor) connected to the measuring part (8) Q3 respectively. , a master gear (1) for measuring 1-pitch meshing error and backlash, and a dent master gear (21'ft) are fitted and installed, and the gear to be measured is brought into two-tooth mesh with the master gear. When one of the gears is rotated by the full-drive motor, the master gear (1) shows a noticeable amount of fluctuation, such as the aforementioned tooth space runout, and the master gear (2) shows dents. The amount of variation is sensed, each is measured and calculated like a device similar to a conventional automatic sorting machine, and this is compared with the set value, and the quality of each is displayed, and all conditions are The selection is made so that those that satisfy the following criteria will be adopted.

In this way, this invention can easily, accurately, and instantly measure and sort only dents, which could not be carried out with conventional methods.Furthermore, it is also possible to accurately measure and evaluate the condition of defects, making it even more effective. This has the remarkable effect of being able to simply equip an automatic transmission with no noise.

In addition, this device has two master gears attached to one device and performs total Ni measurement, but it is also possible to have multiple master gears that meet the respective conditions, and to move the gears to be measured and perform the master measurement separately. It can also mesh with gears and measure various elements.

[Brief explanation of the drawing]

Figure 1 shows a schematic diagram of a conventional gear automatic sorting machine, and the second
The figure is a 5f11 side view of the embodiment of the present invention, and FIG. 3 shows the relationship between the tooth width and torsion angle of the master gear and the gear to be measured. (A) is a master gear for tooth groove deflection, (B) is a master gear for dents, and (C) is a gear to be measured.

Claims (3)

[Claims] (1) A gear to be measured is fitted to a fixed shaft, and a plurality of master gears that mesh with the gear to be measured in two-tooth meshing at different positions are each supported by a floating rotating shaft, and the gear to be measured is connected to the gear to be measured. An automatic gear sorting machine that measures the amount of variation in the center-to-center distance of each master gear with respect to rotation, compares the measured value with the allowable value, and selects whether the measured gear is good or bad. (2)? The gear to be measured is fitted to the fixed shaft. One of the plurality of master gears that mesh with the gear to be measured in a two-tooth mesh at different positions, respectively, has a longer tooth width than the gear to be measured, and the torsion angle is determined. Either make it weaker or attach a reverse follow lead so that the master gear contacts the sharp edge side or both ends of the gear to be measured, and also make sure that the tip of the gear to be measured and the master gear come into contact as the tooth tip descends. An automatic gear sorting machine is installed at . (3) Automatic gear selection according to claim (2), in which the tooth width of the gear to be measured is made shorter than that of the gear to be measured, except for the master gear which has a longer tooth width. Machine.