JPS6042352Y2 - Rotating torsion testing machine - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rotational torsion testing machine used, for example, when testing the durability against rotational torsion of a clutch disk of an automobile clutch.

In order to test the durability of a damper spring or the like mounted on a clutch disc, it is said to be effective to repeatedly apply rotational torsional force between the spline hub of the clutch disc and the disc plate.

For this purpose, the inventors developed a rotating torsion testing machine as shown in Fig.
No. 0401).

That is, in FIG. 1, a driving pulley 3 is attached to the output shaft 2 of a motor 1, and a first inertia 6 is attached to a driven pulley 5 which is interlocked and connected to this pulley 3 via a belt 4.

A spline shaft 10 is coupled to the output shaft 7 of the first inertia 6 via a Fuchs joint 8 such as a universal joint and a connecting shaft 9.

Further, a second inertia 11 is supported coaxially with the spline shaft 10, and a disc plate 12b of the clutch disc 12, which has a spline hub 12a wedged around the spline shaft 10, is fixed by tightening with bolts or the like (not shown). do.

In such a test machine, when the motor 1 is driven, the first
And the second inertia 6.11 tries to rotate at a constant speed.

However, the output shaft 7 of the first inertia 6 and the connection shaft 9, which is coupled to the second inertia 11 via the clutch disc 12 and the spline shaft 10, are coupled at an angle via the wax joint 8. Therefore, although the second inertia 11 attempts to rotate at a constant speed, the connection shaft 9 and the spline shaft 10 rotate at an inconstant speed, and the connection between the spline hub 12a and the disk plate 12b of the clutch disk 12, which connects them, is caused. A rotational torsional force is repeatedly applied to the

However, with such a testing machine, although the magnitude of rotational twist can be changed by changing the angle of the wax joint 8, the number of twisting occurrences per rotation is fixed, so The number of rotations (number of input shafts) and the rate of repetition of twisting (twisting cycle) cannot be changed independently.
There was a drawback that it was not possible to faithfully simulate the actual usage conditions of the clutch disc as a sample.

This idea was made in view of the above, and it is possible to adjust the actual usage conditions by changing not only the magnitude of rotational torsion but also the number of revolutions of the specimen and the torsional cycle applied to the specimen. The purpose is to provide a rotating torsion testing machine that can simulate more accurately.

In order to achieve this objective, the present invention provides a transmission in which a first inertia is rotationally driven by a motor and a second inertia is coupled to an output shaft via a sample. The input shaft of the transmission is tiltably coupled to the output shaft of the first inertia via a Fuchs joint to constitute a rotary torsion testing machine.

As a result, the magnitude of the rotational torsion imparted to the specimen by combining the inconstant rotational motion generated by tilting the Fuchs joint and the relative change in the rotational fluctuation period due to the gear shifting action of the transmission, and its The cycle can be changed together.

Hereinafter, one embodiment of this invention will be described in detail based on FIG.

In FIG. 2, a first inertia 26 is attached to a driven pulley 25 that is interlocked and connected via a belt 24 to an inclined pulley 23 wedged on an output shaft 22 of a motor 21 equipped with a continuously variable transmission.

The output shaft 27 of the first inertia 26 is continuously variable via a Fuchs joint 28 and a connecting shaft 29, which perform non-uniform motion when an angle is given between the input and output shafts, such as a universal joint. The input shaft 31 of the machine 30 is connected.

Further, a spline shaft 34 that engages with a spline hub 33a of a clutch disc 33 as a sample is coupled to the output shaft 32 of this transmission 30.

A second inertia 35 is supported coaxially with the spline shaft 34, and this inertia 35 and the clutch disc 3
The disk plate 33b of No. 3 is tightened and fixed with bolts or the like (not shown).

The first and second inertias 26, 35 are given sufficient mass for both inertias to rotate at a constant speed, and the transmission 30, inertia 35, etc. are centered around the Fuchs joint 28. The output shaft 27 of the first inertia 26 and the input shaft 31 of the transmission 30
The angle of inclination of the connecting shaft 29 connected to the connecting shaft 29 can be arbitrarily changed.

In the above configuration, when the motor 21 is rotated, its rotational torque is transmitted to the first inertia 26 via the drive pulley 23, belt 24, and driven pulley 25.

At this time, even if the rotational torque of the motor 21 fluctuates, the output shaft 27 is rotated at a constant speed because the inertia 26 acts to rotate at a constant speed.

Then, the input side of the Fuchs joint 28 is rotated at a constant speed, but the output side thereof is rotated at an inconstant speed, so that the connecting shaft 29 is driven to rotate at an inconstant speed.

This non-uniform rotation is increased or decreased by the transmission 30 and output to the spline shaft 34.

As the spline shaft 34 is rotated at a non-uniform speed, the spline hub 33a of the clutch disc 33 is also rotated at a non-uniform speed.
Since the second inertia 35 is coupled to the plate 3b, the plate 33b tends to rotate at a constant speed.

As a result, the spline hub 33a and the disc plate 3
3b, a reaction force of torsion force is applied repeatedly.

Incidentally, the reaction force of this torsional force is transmitted to the output shaft 27 of the first inertia 26 via the transmission 30, Fuchs joint 28, etc.
However, since the first inertia 26 is fixed to the output shaft 27, the shaft 27 continues to rotate at a constant speed, and a rotational torsional force is applied to the clutch disc 33 in a predetermined cycle. Keep adding.

Here, in order to change the magnitude of this twist, it is sufficient to change the angle of the sock joint 28.

In addition, in order to change the repetition cycle of the twisting, the first
What is necessary is to change the rotational speed of the output shaft 27 of the inertia 26.

In this way, when the rotational speed of the output shaft 27 is changed in order to change the repetition cycle of torsion, the input rotational speed of the transmission 30 changes accordingly, and the output rotational speed (the rotational speed of the clutch disc) also changes. do.

However, in this invention, the rotation speed of the clutch disk 33 can be arbitrarily changed by changing the gear ratio of the transmission, so for example, only the rotation speed can be changed without changing the repeat cycle of torsion, or The torsion repetition cycle can be changed without changing the rotation speed, or the twist repetition cycle and the rotation speed can be changed in the same way.

In the embodiment, a continuously variable speed motor is used as the drive source for the first inertia 26, and a rotational force is applied to the clutch disk as a sample through the continuously variable transmission, thereby achieving a repeated cycle of torsion. Although the rotation speed and the rotation speed can be changed steplessly, it is also possible to provide a so-called multi-speed change function to both of the above.

In addition, in the example, since a clutch disk was used as a sample, a spline shaft was connected to the output shaft of the transmission, and the spline shaft and the second inertia were coupled via the clutch disk. The mounting structure of the sample is arbitrary.

As explained above, according to the rotary torsion testing machine according to this invention, it is possible to independently change not only the magnitude of torsion imparted to the specimen, but also the repetition cycle of torsion and the number of revolutions. Since it is possible to perform a bench test that more faithfully simulates the actual usage conditions of the sample, the reliability of the rotational torsion test can be improved.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of a conventional example, and FIG. 2 is a partially cutaway plan view showing an embodiment of this invention. 21... Motor, 26... First inertia, 27... Output shaft, 28... Fuchs joint, 30... Speed change Machine, 31...
...Input shaft, 32...Output shaft, 33...
...Specimen (clutch disc), 35...
Second inertia.

Claims (2)

[Scope of utility model registration request] (1) A transmission comprising a first inertia rotationally driven by a motor and a second inertia coupled to an output shaft via a specimen, and a Fuchs joint is attached to the output shaft of the first inertia. A rotary torsion testing machine that connects the input shaft of a transmission in a tiltable manner. (2) The rotating torsion testing machine according to claim 1, wherein the motor is a continuously variable speed motor, and the transmission is a continuously variable transmission.