JPH0454897B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention aims to reduce the dents, tooth groove deflection, one-pitch meshing error, and overball diameter (backlash) of the gear to be measured by meshing two tooth surfaces with the master gear so that they are centered between the two. The present invention relates to an automatic gear sorting machine that measures the amount of change in the distance between rotations and compares it with a set value to instantly sort out whether the 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 dent, 2 tooth groove runout, 31 pitch meshing error, and 4 back crack. (Over Ball Dia), is effective, and for this purpose, we have improved a two-tooth surface meshing tester, and have an automatic gear sorting machine that compares the measured value with the set value to determine the quality of the gear being measured. was used. In other words, the one shown in Fig. 1 is a conventional automatic gear sorting machine, in which a gear to be measured B is fitted onto a shaft that is fixed to a movable support C, and a gear B to be measured is fitted to a shaft that is fixed to a movable support C, and a gear B is fitted to a shaft that is fixed to a movable support C. When the master gear A is rotated, the gear to be measured is floating, so the above error of the gear to be measured B is reflected in the measuring part D as a change in the center distance between the two.
It can be detected by Using sampling pulses at regular intervals generated from a timer mechanism and timing pulses generated for each tooth of the master gear,
Every time a sampling pulse occurs, the value of the electric micrometer indicating the amount of variation is taken into the measuring device, the maximum value and minimum value of an arbitrary interval are measured, and after performing these necessary calculations through a low-pass filter and a high-pass filter, the settings are made. The quality of the gear is determined by comparing it with the value. E in Figure 1
is a recording section, and F is a judgment section that organizes the signals, compares them with a set value (tolerable value), and issues a judgment.

However, the above-mentioned conventional gear automatic sorting machine has the disadvantage that it cannot detect dents in non-contact parts when the master gear and the gear to be measured mesh. Because the parts are subjected to carburizing and quenching or carburizing and nitriding treatment as heat treatment, sagging occurs at both ends in the lead direction after heat treatment, resulting in non-contact areas during meshing. If it is located at both ends (particularly the sharp edges), dents are likely to occur, and sensing is therefore insufficient. Also, dents in this area cannot be detected by a gear speeder (a device that auditorily judges the sound of gears meshing at a designed distance between the shafts), and can only be detected after the transmission is assembled and torque is applied. Since this is possible, sensing dents during sorting is essential. In addition, the dents caused by measuring all conditions with one master gear appeared in the form of other requirements and noise, making measurements of other conditions inaccurate.

The purpose of this invention is to eliminate the drawbacks of the conventional automatic gear sorting machine, and fix the supporting stand for the floating gear to be measured in the conventional type, while making the rotating shaft of the master gear floating, and In addition to sensing the center distance between the gear and the master gear on the rotating shaft side of the master gear, one of them can detect only dents, and the other master gear can detect bumps, gear runout, one-pitch meshing error, etc. It is possible to detect whether the gear is good or bad based on the overall information.

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 master gear.

3 One of the master gears should have a reverse follow lead so that it can contact the tooth tip and both ends of the gear to be measured, and the tooth tip should be downward (increase the pressure angle at the tooth tip) (10 to 20μ). .

4 One of the master gears mentioned above is longer than the tooth width of the gear to be measured (approximately 20%) for dents.
However, the width of the other master gears should be shorter (approximately 10%) than that of the gear to be measured so that they do not come into contact with both ends, etc., in order to judge the deviation of tooth spaces.

The configuration is as described above.

This will be explained with reference to an embodiment shown in the drawings. Fig. 2 shows one embodiment of the present invention.
This is a master gear for pitch meshing errors and bump crashes), and as mentioned above, the tooth width is about 10% shorter than that of the gear to be measured 3 to achieve two-tooth surface meshing (see Figure 3). 4 is the shaft of the master gear 1, the lower part of which is connected to the drive motor 6 via an automatic joint 5.
The rotation is transmitted to the master gear 1, and the gear to be measured 3 also rotates due to the meshing. (If all the master gears are in mesh with the gear to be measured 3, it is not necessary for all the shafts to have a drive motor. It is sufficient if one of them is driven. 7 is a support that fits the shaft 4. The support base 7 measures the amount of positional variation of the support base 7 via the measurement unit 8 and sends the electrical signal to a calculation unit (not shown, which has the same configuration as the conventional one). Processed and sorted.Support stand 7
The measuring unit 8 is supported on the base 16, for example, by rollers, so that it can be moved without resistance on the line connecting the centers of the master gear and the gear to be measured on the base 16, and the distance between the axes of the gear to be measured and the master gear is The fluctuation in the gear is read by an electric micro and is accurately transmitted to the calculation section. Reference numeral 9 is a measuring pressure spring, which is designed to ensure that the gear to be measured and the master gear engage with each other at a constant pressure. 10 is a measurement pressure spacer;
11 is an air-hydro cylinder. 2 is a master gear that is also finished with high precision,
In order to be able to detect only the dents particularly well, the tooth tip is made approximately 20% longer than the width of the gear to be measured 3 and has a concave shape so as to be in close contact with the lead surface of the gear to be measured. Shape so that both ends of the part can be touched. A shaft that fits the master gear 2, similar to the shaft 4 of other master gears,
It is connected to a drive motor 6 via a universal joint 5. The support stand 13 and the measurement unit 12 have the same configuration as the measurement unit 8 for the support stand 7, and are supported on the master gear and the gear to be measured on the base 16 without resistance, so that the gear to be measured and the master gear are engaged. The distance between the axes is read by an electric micrometer and transmitted to the calculation section. Reference numeral 15 denotes a shaft of the gear to be measured 3, into which the gear to be measured 3 is fitted and rotated while being supported by a support stand 15 fixed to a base 16.

FIG. 3 shows the relationship between the tooth width and the reverse follow lead, and shows a schematic diagram of the master gear 2 for impressions in A and the other master gear 1 in C. B is
This is for the gear to be measured, and m indicates the length of its tooth width. 1 indicates the length of the tooth width of the master gear 1 for measuring dents, and n indicates the tooth width of the master gear 2 for measuring other than the dents. As shown in Figure 3, 1>m
>n. Further, β° indicates that the other master gear A2 has a helix angle, and the master gear A1 for impression is a gear whose tooth tip is lowered as a reverse fluoro lead.

Since this invention is configured as described above,
The shaft 4 of the support 7 that fixes the gear to be measured to the base 16
A master gear 1 for measuring tooth groove runout, 1-pitch meshing error, and bumpiness is mounted on the support stands 7 and 13 connected to the measurement units 8 and 12, respectively.
When the master gear 2 and the master gear 2 for dents are fitted and attached, and the gear to be measured is engaged with the two tooth surfaces, and one of the master gears is rotated by the drive motor, the above-mentioned tooth groove is transmitted from the master gear 1. The master gear 2 senses the amount of variation that indicates significant runout, etc., and the amount of variation that indicates dents from the master gear 2.
It measures, performs calculations, compares this with set values, displays the quality of each, and selects to adopt when all conditions are satisfied.

In this way, this invention can easily, accurately, and instantly measure and sort only dents, which could not be done with conventional methods, and can also accurately measure and evaluate other conditions, making it even more effective. This has the remarkable effect of allowing automobiles to be equipped with noiseless transmissions.

Although this device measures two master gears by attaching them to one device, it is also possible to use multiple master gears that meet the respective conditions.
Various elements can be measured by moving the gear to be measured and specifically meshing it with the master gear.

[Brief explanation of drawings]

FIG. 1 shows a schematic diagram of a conventional automatic gear sorting machine, FIG. 2 is a side view of an embodiment of the present invention, and FIG.
The figure 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. 1, 2... Master gear, 3... Gear to be measured, 4,
14...rotating shaft, 5...universal joint, 6...motor, 7,
13, 15...Support No. 8, 12...Measuring part, 17...
Reverse follow read.

Claims (1)

[Scope of 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 at different positions in two-tooth meshing are supported by floating rotating shafts, and Two-tooth surface meshing is used in an automatic gear sorting machine that measures the amount of change in the center distance between the measuring gear and each master gear with respect to rotation, compares the measured value with the allowable value, and selects whether the measured gear is good or not. One of the multiple master gears that mesh with the gear to be measured has a longer tooth width than the gear to be measured, and a reverse follower lead is attached so that the master gear contacts the shear edge side or both ends of the gear to be measured, and An automatic gear sorting machine with a double master gear, which is installed so that the tooth tip of the gear to be measured and the master gear are in contact with each other as the tooth tips are lowered, and the amount of variation in the distance between the centers of the gear to be measured and each master gear with respect to rotation is measured. . 2. The automatic gear sorting machine according to claim 1, wherein the tooth widths of the master gears other than the master gear, which is longer than the tooth width of the gear to be measured, are shorter than the tooth width of the gear to be measured.