JPH034921Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a torsion measuring device for a torsional damper, and particularly relates to an improvement of a static torsion measuring device for a torsional damper.

[Prior Art] As shown in FIG. 1, a crankshaft 2 is installed inside an engine 1 of an automobile, etc., and a clutch 5, a transmission 6, an axle system, etc. are connected to the crankshaft 2. The crankshaft 2 is subjected to fluctuating torque due to gas pressure and inertia of the reciprocating portion. When the harmonic of this fluctuating torque matches the natural frequency of the crankshaft 2, the crankshaft 2 resonates and torsional vibration force is induced. In order to dampen this torsional vibration force, a torsional damper 3 is conventionally provided on the tip side of the crankshaft 2.

As shown in FIG. 2, the disk 4 of the torsional damper 3 is fixed to the crankshaft 2 with a screw 10 or the like. An elastic body 8 is tightly fixed to the outer periphery of the disk 4 by enclosing the outer periphery by baking or the like. An annular inertial body 9 is closely fixed to the outer periphery of the elastic body 8 by baking or the like. With the above configuration, the torsional vibration of the crankshaft 2 is attenuated by the inertial body 9 and the elastic body 8.

In order to effectively damp the torsional vibration of the crankshaft 2, the mass of the inertial body 9 and the torsional spring constant of the elastic body 8 must be adjusted so that the natural frequency of the crankshaft and the natural frequency of the torsional damper match. Must be set.

The torsional spring constant is determined by the torque applied to the torsional damper and the relative rotation angle between the disk 4 and the inertial body, which is the deformation of the elastic body at this time.

As a means of finding the relationship between torque and rotation angle,
In the prior art, a static torsion measuring device shown in FIG. 3 was employed. That is, the lever 11 is fixed to the central shaft portion of the disk 4 of the torsional damper 3. Further, an external force is applied to the outer periphery of the inertial body 9 as shown by arrow B to fix it. A load is applied to the tip of the lever 11 as shown by arrow A, and the deflection δ at the load point is measured using a dial gauge 12 or the like.
The displacement angle of the torsional damper is determined from the deflection δ and the length of the lever 11, and the torque is determined from the load applied to arrow A and the length of the lever 11.
Therefore, by changing the load, the relationship with the torque rotation angle can be determined.

[Problem to be solved by the invention] However, as described above, the torsional damper 3 is attached to the crankshaft 2,
It rotates with the robot and receives a rotational load. Therefore,
In the measurement using the above device, the static characteristics of the torsional damper were determined by replacing rotational displacement with linear displacement and replacing rotational torque with linear load, which had to be determined by calculation.

The purpose of this invention is to solve the above-mentioned drawbacks, and the purpose is to propose a simple torsion measuring device for a torsional damper that can directly measure the torsion angle and torque to reliably and accurately grasp the torsion angle and torque. It is in.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a torsion measuring device for a torsional damper in which an elastic body is interposed between an inertial body and a disk. a driving means for rotationally driving one of the torsional damper and the disk; a rotational load means for gripping the other of the inertia body and the disk of the torsional damper and applying a rotational load to the torsional damper; Torque detection means is provided between the driving means and detects the torque loaded on the torsional damper, and 2 detects the rotational position of the inertial body and the disk, respectively.
one rotational position sensor, a rotational angle detection means for detecting the rotational phase angle of the inertial body and the disk based on the signals from both rotational position sensors, and a rotational angle detection means that is connected to the torque detection means and the rotational angle detection means, and detects the detected torque and the rotational angle detection means. The present invention is characterized by comprising a recording means for displaying the rotational phase angle.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

As shown in FIG. 4, a rotary load means 13 is provided at the upper end of the pedestal 22 supported by a base 23. As shown in FIG. A chuck 14 for gripping the torsional damper 3 is connected to the lower side of the rotary load means 13. The rotational load means 13 is configured to apply a load necessary for rotating the rotational shaft of the chuck 14 to the rotational shaft of the chuck 14 by means not shown, and to be able to change this load. Check 14 is
It engages with the outer periphery of the inertial body 9 of the torsional damper 3 and firmly grips it by means not shown.

Further, the disk 4 of the torsional damper 3 is connected to the shaft 15a of the torque detection means 15. The torque detection means 15 is configured to detect the torque applied to the shaft 15a using a strain gauge or the like. Further, the torque detection means 15 is connected to the frame 22
It is placed on a support stand 17 attached to.

A drive shaft 16 is connected to the opposite side of the shaft 15a of the torque detecting means 15 from the torsional damper 3, and the lower end side of the drive shaft 16 includes:
A gear 18, which is one of the drive means 30, is attached, and a rotation angle detection means 20 is also attached. Any known rotation angle detection means may be used, and in this embodiment, one composed of a pulser and a sensor used for adjusting the injection timing of the engine is used. The drive means 30 includes a variable drive motor 21 placed on a pedestal 22, a gear group 19 connected thereto, a gear 18, and the like.

A pulsar 25 is provided on the inertial body 9 of the torsional damper 3, and a sensor 26 is provided at a position facing the pulsar 25. Similarly, a pulsar 27 is provided on the disk 4 of the torsional damper 3, and a sensor 28 is provided at a position opposite to the pulsar 27.
is provided. Thus, the pulser 25 and the sensor 26 and the pulser 27 and the sensor 28 each constitute a rotational position sensor, and the sensor 26 and the sensor 28 are connected to the rotational angle detection means 20. Further, the rotation angle detection means 20 is connected to an XY recorder 24 which is a recording means. Torque detection means 15 is also connected to the XY recorder 24.

As described above, the torque acting on the torsional damper 3 and the phase angle between the inertial body 9 and the disk 4 are input and displayed on the XY recorder 24. Note that the control means 29 controls the entire torsion measuring device.

Next, the operation of this embodiment will be explained.

Before gripping the torsional damper 3, which is the object to be measured, in the chuck 14, the shaft 15a of the torque detection means 15 and the chuck 14 are connected, and the entire system is rotated by the variable drive motor 21, and the torsional characteristics at each rotation speed are measured. Measure in advance.

Next, the inertial body 9 of the torsional damper 3 is firmly gripped by the chuck 14. Further, the rotation of the motor 21 is reduced to 1/2500 and applied to the disk 4 of the torsional damper 3 via a speed reduction mechanism including gears 19 and 18, thereby causing the torsional damper 3 to rotate. Since the rotational load means 13 is connected to the inertial body 9 of the torsional damper 3, the torsional damper 3 is twisted and a phase angle is created between the inertial body 9 and the disk 4. The rotation of the motor 21 is stopped when the torque reaches 50 kgm as determined by the torque detection means 15. This phase angle is detected by the pulsers 25 and 27 that engage the inertial body 9 and the disk 4, and the sensors 26 and 28. This detected value is input to the rotation angle detection means 20, and the phase angle is measured. Usually, this phase angle is about 2 to 3 degrees.

On the other hand, the torque detection means 15 measures the torque applied to the shaft 15a. This torque value is approximately equal to the torque acting on the torsional damper 3.

The measured values of the phase angle and torque measured using the above method are sent to the XY recorder, where the phase angle is input on the X axis, and the torque applied to the torsional damper is input on the Y axis. relationships are displayed two-dimensionally. The torsional spring constant of the torsional damper is understood as the slope of the graph displayed on the X-Y recorder.

In this way, the torsional spring constant of the torsional damper can be accurately determined.

In the above embodiment, the inertial body 9 is connected to the chuck 14.
Although the disk 4 side is gripped by the rotary load means 13 side, the same holds true even if the disk 4 side is connected to the rotary load means 13 side. Further, the torque detection means 15 is not limited to a strain meter type. Further, it goes without saying that the rotation angle detection means 20 is not limited to the illustrated position. In addition, although the torsional damper has been described as being installed on the crankshaft of an engine, etc., it is not limited to this, and it goes without saying that it can be applied to torsion measurement of the same or similar torsional damper. .

[Effects of the invention] As is clear from the above explanation, the present invention allows accurate static torsional characteristics of a torsional damper to be easily determined by directly measuring the rotational displacement and rotational torque of the torsional damper. It can be accurately measured using a device, and has an important effect on product quality control.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an engine crankshaft system in which a torsional damper is used, Fig. 2 is a sectional view showing the structure of the torsional damper, Fig. 3 is a configuration diagram showing a conventional torsion measuring device, Fig. 4 FIG. 1 is a front view showing an embodiment of the present invention. 2...Crankshaft, 3...Torsional damper, 4...Disc, 8...Elastic body, 9...Inertial body, 13...Rotating load means, 14...Chuck, 15...Torque detection means, 20 ... Rotation angle detection means, 21 ... Variable drive motor, 22 ... Frame, 24 ... XY recorder, 25 ... Pulser A, 26 ... Sensor, 27
... Pulsar, 28 ... Sensor, 29 ... Control means, 30 ... Drive means.

Claims (1)

[Scope of utility model registration request] A torsion measuring device for a torsional damper in which an elastic body is interposed between an inertial body and a disk, comprising: a driving means for rotationally driving either the inertial body of the torsional damper or the disk; and an inertia of the torsional damper. a rotational load means that grips either the body or the disk and applies a rotational load to the torsional damper; and a torque that is provided between the torsional damper and the rotational drive means and detects the torque loaded on the torsional damper. a detection means, two rotational position sensors for detecting the rotational positions of the inertial body and the disk, respectively, a rotational angle detection means for detecting the rotational phase angle of the inertial body and the disk using signals from both rotational position sensors, and the torque 1. A torsion measuring device for a torsional damper, comprising recording means connected to the detection means and the rotation angle detection means and displaying the detected torque and rotation phase angle.