SU55476A1 - Gear test device for runout - Google Patents

Description

Known instruments for testing gears on the beating using a clockwise minimeter.

In the device according to the invention, a minimeter with a clockwork is also used, but the device differs in that, in order to carry out continuous rotation of the gear being tested without pulling the miniature miniature pin, the nozzle of this pin is made concave along the radius of the wheel being measured and the width equal to or greater than one and a half steps of the teeth of the wheel.

The accompanying drawing shows an exemplary form, embodiments of the invention, with FIG. Figures 1 and 2 depict a side section and front view with the front cover of the minimeter removed; FIG. 3 - diagram of the legs of a known device; FIG. 4 is a diagram of the action of the feet of the proposed device; FIG. 5 - the shape of the leg itself; FIG. 6-plate arrangement for fastening the pin of the gear to be measured; FIG. 7 is a general side view of a gear testing device; FIG. 8 - a general view of the device in front.

The very sensitive minimeter shown in FIG. 1 and 2, has a dial with twenty divisions. The price of each division is 0.01 mm. On this scale, the deviations of the arrow at 0.005 mm are very well marked. Adjusting the minimeter is accomplished by fine-tuning the head 2 of the rod 1, i.e., filing it on the right or left side; this changes the length of the shoulder 3-2, i.e. the distance from the axis 3 of the sector 4 to its point of contact with the head 2. This fine-tuning can adjust the scale of the minimeter with an accuracy of 0.001 mm.

The use of such a minimeter in the proposed device provides a full guarantee against damage to the tops of the teeth when the leg of the minimeter is in contact with the wheels being checked, even with the smallest teeth not exceeding 0.05 mm, such as the velvet teeth of stopwatches.

As mentioned above, with existing devices for testing gears using a minimeter, the hand of the latter moves around the dial during the test. This is usually because the leg 1 of the minimeter falls between the teeth 5 of the gear, as can be seen from FIG. 3

According to the invention, the leg / minimeter (Figs. 5 and 4) has a concave support surface with a radius equal to the outer, radius of the wheel being tested, and a width H, equal to 1.5 steps of teeth. Therefore, when turning the wheel, its teeth slides along the polished concave end surface of the leg, and, before one tooth descends from the leg, the next one already rises onto it.

On the other hand, since the width H is less than the double pitch of the teeth (, each tooth can be measured, since in the case of different heights, for example, teeth 5 tl 6 (Fig. 4), the leg / is always on one tooth for some time, which would not be the case for magnitude.

The leg 1 ends in a cone (Fig. 5), which is inserted into the shaft 8 of the minimeter (Fig. 1). Each leg is applicable for wheels of one module or diameter. Interchangeable legs are made for wheels with a different module or diameter.

To fasten the wheel of the checked wheel in the device, plates 9 are used, one for each of the two axle pins (Fig. 6, 7).

Each such plate 9 has a hole 10 for mounting it in the device and is provided with a triangular cutout K with an angle of 90 °. The recess prism 11 is included in this recess, and it is integral with the spring 12 attached to the plate 9, the pin of the tested gear wheel is inserted between the recess and the prism 11 and held in by friction sufficient to turn the wheel. The IS screw makes it possible to adjust the spring 12 so that the pins of various diameters can be inserted.

The instrument is mounted on table 7 (Fig. 7, 8) supported by three or four legs 15. On this table a lower clamping clutch 16 is installed (Fig. 8), in which the lower central rod 17 is fixed by a nut 18. The rod 17 has a tapered hole.

Next to the coupling 16, a second coupling 19 is installed, in which the column 20 is fastened, carrying a crossmember 21 at its upper end. On it, the lever 22 and the upper coupling 23 are secured with nuts 24.

In the clutch 23, the upper central rod 25 moves (Fig. 7-8).

Both the lower 17 and the upper central shaft 25 strengthen the prismatic plates 9 described above, into which the axles of the tested gear wheels are inserted.

To check the gear wheel, its axis is inserted with one of its trunnions into the prism 11 and pressed against the spring 12.

The minimeter M is mounted on the pins 26 of the swivel stand 27. The axis of the leg of the minimeter must pass through the axis of the wheel. This position of the minimeter is adjusted by a screw 28 (spring is provided with a return stroke) until the arrow stops scrolling and starts to move smoothly when turning the checked wheel.

A screw 29 with a handle SO serves to secure the stand 27 with a minimeter M. The head 31 of the screw hidden in the table serves to set the minimeter to zero.

When installing the axis in the bottom plate 9, the right teeth of the wheel against the leg of the minimeter at the same time occurs. Then the top plate 9 is lowered from above with the help of the lever 22. The arrow of the minimeter is set to its initial position, from which the - | - or - is read.

If the upper and lower axles of the wheel axle have a different diameter, then the screw 32 releases the collar 55 and turns the cross member 21 to the desired value. Having installed the wheel axis in a vertical position under the square, fix the clamp 55 with the screw 32.

For different lengths of axes, column 20 can be moved in the vertical direction.

The subject matter of the invention. A tool for testing gears for beating using a minimeter with a clock mechanism, characterized in that, in order to continuously turn the checked

gears, without delaying the measuring pin of the minimeter, the nozzle of the latter is made concave along a radius equal to the radius of the wheel being measured, and has a width equal to or greater than one and a half steps of the wheel teeth.

to the author's testimony of A. No. 55476

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