JPH07333106A - Inspection method for damper pulley and inspection apparatus therefor - Google Patents

Abstract

PURPOSE:To inspect the damping function of a damper pulley for an engine easily at high precision by an inspection apparatus in the outside of an engine. CONSTITUTION:In a damper pulley inspection apparatus 20, a driving pulley 33, a first and a second pulleies 36, 35 to be driven, a damper pulley 7, and a third pulley 34 to be driven are installed in the way the relation of their relative positions is made to be the same as that of a V-type 6-cylinders engine, a servomotor to drive the driving pulley 33 is installed, the pulley ratio of the driving pulley 33 and the third pulley 34 to be driven is set to be 1:2/3, and in the third pulley 34 to be driven, an action generating means to start action simultaneously with the start of an engine is installed. The action generating means is composed of a non-true circular structure in which the pulley 34 is made to be an elliptical shape and an eccentric structure in which the center of the pulley 34 is set to be eccentric to the rotary center.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inspecting a damper pulley and an inspection apparatus therefor, and more particularly to a damper pulley for an engine by applying a behavior equivalent to that generated in an engine in an inspection apparatus outside the engine. Technology for testing the damping performance of

[0002]

2. Description of the Related Art Conventionally, a crank pulley is attached to a crankshaft of an engine, a driven pulley for a water pump that circulates cooling water by the rotation of the crankshaft, and a driven pulley for a hydraulic pump for power steering. In order to drive a plurality of driven pulleys such as a driven pulley for a supercharger (supercharger), a belt is wound around the crank pulley and the plurality of driven pulleys. When the driven pulley that drives equipment that is not affected by the fluctuations in rotation speed due to cylinder explosion transmitted to the crank pulley and the fluctuations in rotation speed that occur in the driven pulley for the water pump is composed of damper pulleys There are many.

By the way, in an automobile manufacturer, for example, when the damping characteristics of the damper pulley are improved, when the damping performance of the improved damper pulley is inspected, the damper pulley is mounted on an actual engine. Then, the engine is actually operated to detect the rotational speed fluctuation of the output shaft of the damper pulley,
The damping performance of the damper pulley is inspected based on the detection result. For reference, the actual Kaihei 3-1753
Japanese Unexamined Patent Publication (Kokai) No. 6 proposes a detection device that detects the slippage of a belt by detecting the rotational states of a drive pulley around which a belt is wound, a plurality of driven pulleys, and an idler pulley.

[0004]

As described above, when the damping performance of the damper pulley is inspected, the damper pulley is mounted on the actual engine and inspected, which complicates the inspection and lowers the inspection efficiency. However, since an actual engine is required for the inspection of damping performance, the inspection device becomes large in size and expensive, which is a problem.

It is an object of the present invention to provide a damper pulley inspecting method and an inspecting apparatus for the damper pulley which can easily and accurately inspect the damping performance of the damper pulley without using an actual engine.

[0006]

A damper pulley inspection apparatus according to claim 1 is an inspection apparatus for inspecting the performance of an engine damper pulley, comprising a damper pulley and a drive pulley instead of a crank pulley of the engine. , A rotary drive means for rotationally driving the drive pulley, a plurality of driven pulleys replacing the plurality of actual driven pulleys driven by a crank pulley, a damper pulley, a drive pulley, and a plurality of driven pulleys. A power transmission member to be wound,
The behavior generating means is provided on any one of the plurality of driven pulleys and generates a behavior equivalent to the behavior generated on the crank pulley and the plurality of actual driven pulleys in the engine.

Here, the pulley ratio between the drive pulley and the driven pulley provided with the behavior generating means may be set based on the model of the engine (claim dependent on claim 1). Item 2). The behavior generating means may be configured to include an eccentric structure in which a driven pulley provided with the behavior generating means is eccentric with respect to a rotation center of the driven pulley (claim 3 dependent on claim 2). The behavior generating means may be configured such that the driven pulley on which the behavior generating means is provided includes a non-true circular structure having a non-true circular shape (claim 4 dependent on claim 2).

The behavior generating means may be configured such that the driven pulley in which the behavior generating means is provided includes a non-round shape in which the driven pulley is formed in a non-round shape (claim 5 dependent on claim 3). In the non-true circular structure, the driven pulley provided with the behavior generating means may have an elliptical shape (claim 6 dependent on claim 5). The engine is a V-type 6-cylinder engine, the pulley ratio of the drive pulley and the driven pulley provided with the behavior generating means is set to 1: 2/3, and the non-round structure allows each engine It may be arranged to generate a behavior corresponding to the explosion of a cylinder (claim 7 dependent on claim 6).

The inspection method of the damper pulley according to claim 8 is as follows:
A method of inspecting the performance of a damper pulley for an engine, which is the same as when the damper pulley is attached to the engine by the damper pulley inspection device when the damper pulley is attached to the damper pulley inspection device. The rotational frequency of the damper pulley is driven by rotation, the rotational speed of at least the output member of the damper pulley is detected with high accuracy by the detecting means, and the detection signal is analyzed by the fast Fourier transformer to determine the vibration frequency of the output member of the damper pulley. It is characterized in that the damping performance of the damper pulley is inspected by obtaining the spectrum.

[0010]

According to the damper pulley inspection apparatus of the present invention, the damper pulley, the drive pulley in place of the crank pulley of the engine, and the plurality of driven pulleys driven by the crank pulleys are replaced. The power transmission member is wound around the drive pulley, and the drive pulley is rotationally driven by the rotary drive means. Therefore, the damper pulley and the plurality of driven pulleys are integrally rotationally driven via the power transmission member. To be done. Here, the behavior generating means provided in any of the plurality of driven pulleys is
The same behavior as that occurring in the crank pulley and a plurality of actual driven pulleys is generated in the engine.

Therefore, since the same behavior as that generated in the crank pulley and a plurality of actual driven pulleys in the engine is transmitted from the driven pulley provided with the behavior generating means to the power transmission member, the damper pulley is connected to the engine. The damping performance of the damper pulley can be
Easy, highly accurate and efficient inspection is possible.

According to another aspect of the damper pulley inspection apparatus of the present invention, the pulley ratio between the drive pulley and the driven pulley provided with the behavior generating means is set based on the engine model (model such as the number of cylinders of the engine). Therefore, by changing the pulley ratio according to the engine model, it is possible to generate multiple types of behaviors according to the engine model.

In the damper pulley inspection apparatus of the third aspect, the behavior generating means includes an eccentric structure in which the driven pulley on which it is provided is eccentric with respect to the rotation center of the driven pulley. For example, the rotational speed fluctuation is transmitted once per revolution of the water pump to the actual driven pulley for the water pump of the engine, but to the driven pulley instead of the actual driven pulley for the water pump, By providing the behavior generating means and providing the behavior generating means with the eccentric structure, it is possible to generate the rotational speed fluctuation corresponding to the rotational speed fluctuation by the water pump of the engine.

In the damper pulley inspection apparatus of the fourth aspect, the behavior generating means includes a non-true circular structure in which the driven pulley on which the behavior generating means is provided has a non-true circular shape. This non-round structure means a structure such as an elliptical shape, a triangular circular shape, and a quadrangular circular shape. In the damper pulley inspection device according to claim 5, the behavior generating means includes the eccentric structure and the non-true circular structure. Therefore, the behavior that occurs in the eccentric structure and the behavior that occurs in the non-true circular structure. Both can be generated.

In the damper pulley inspection apparatus of claim 6, in the apparatus of claim 5, the non-true circular structure is
Since the driven pulley has an elliptical shape, it is possible to generate two rotation speed fluctuations per one rotation of the driven pulley. According to a seventh aspect of the present invention, in the damper pulley inspection apparatus according to the sixth aspect, the engine is a V-type 6-cylinder engine, and the pulley ratio between the drive pulley and the driven pulley provided with the behavior generating means is 1: 2. / 3, the behavior generating means generates the behavior corresponding to the explosion of each cylinder of the engine by the non-round structure having the elliptical configuration.

That is, in the V-6 engine,
Due to the cylinder explosion, the rotation speed changes three times per one rotation of the crank pulley. In the inspection device, when the driving pulley corresponding to the crank pulley makes one rotation, the driven pulley provided with the behavior generating means makes 1.5 rotations, but when the driven pulley makes 1.0 rotation, the non-true shape of the elliptical structure is formed. Due to the circular structure, two rotation speed fluctuations occur. Therefore, it is possible to generate rotational speed fluctuations (behavior of rotational vibration) three times per one rotation of the drive pulley, that is, rotational speed fluctuations corresponding to rotational speed fluctuations due to cylinder explosion in the engine. In addition, the eccentric structure that constitutes the behavior generating means can generate a rotational speed fluctuation of 1.5 times per one rotation of the drive pulley, that is, a rotational speed fluctuation corresponding to the rotational speed fluctuation of the water pump in the engine.

In the damper pulley inspection method of the eighth aspect, when the damper pulley is mounted on the damper pulley inspection device, the damper pulley inspection device
The damper pulley is rotatably driven with the same rotational speed fluctuation as when mounted on the engine. Next, the rotational speed of at least the output member of the damper pulley is detected with high accuracy by the detection means, and the detection signal is analyzed by the fast Fourier transformer to obtain the vibration frequency spectrum of the output member of the damper pulley to obtain the damper pulley. Check the damping performance of. Therefore, the damping performance of the damper pulley can be easily, accurately and efficiently inspected without mounting the damper pulley on the engine.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the present invention is applied to a damper pulley inspecting device for inspecting the damping performance of a damper pulley for driving a mechanical supercharger, which is a damper pulley mounted on a V-type 6 cylinder engine. Is. Note that the following description includes a method for inspecting the damper pulley. First, a crank pulley and a plurality of driven pulleys driven by the crank pulley via a belt in the V-6 engine E will be described first.

As shown in FIG. 1, in the V-type engine E, an electric belt mechanism including a crank pulley 3 is attached to the outside of the front end surface of the crankcase located above the oil pan 2 as follows. There is. The crank pulley 3
Is fixed to a crankshaft (not shown), and the water pump pulley 4 is provided immediately above the crank pulley 3.
Is attached to the input shaft of a water pump (not shown) that pressurizes the cooling water. Further, a power steering pulley 5 is attached to a power steering hydraulic pump (not shown) on the slightly left side of the crank pulley 3, and an idle pulley 6 is spring-biased on the diagonally right upper side of the power steering pulley 5. The damper pulley 7 is attached to the right pivotal upper side of the idle pulley 6 mounted on the pivotal support arm, and the inner pulley (output member) of the damper pulley 7 is located between the left and right banks of the V-type engine E. Is connected to the drive shaft of a mechanical supercharger (supercharger).

Here, an endless belt 14 is wound around the crank pulley 3, the idle pulley 6, the power steering pulley 5, the damper pulley 7, and the water pump pulley 4. An elastic biasing force is applied to the belt tension side 14 by the idle pulley 6. These pulleys 3 to 7 are rotationally driven via the belt 14 by the rotational driving force of the crank pulley 3 driven by the explosion of the six cylinders.

Next, the inspection device 20 for inspecting the damper pulley 7 mounted on the V-type 6 cylinder engine E will be described.
This will be described with reference to FIGS. The vertical plate-shaped main frame F has a drive pulley 3 corresponding to the crank pulley 3.
3 and the first driven pulley 3 corresponding to the idle pulley 6
6, a second driven pulley 35 corresponding to the power steering pulley 5, a damper pulley 7, and a third driven pulley 34 corresponding to the water pump pulley 4,
The first and second driven pulleys 36, 35 are arranged in the same positional relationship as that of the V-type 6-cylinder engine E.
Each of them is rotatably supported by the main frame F by a pivot shaft (not shown), and the third driven pulley 34 is rotatably supported by the main frame F by the pivot shaft 21. There is.

The damper pulley 7, as shown in FIG.
A pivot shaft 22 in the front-rear direction that passes through the main frame F
3, the drive pulley 33 is rotatably supported by the main frame F, and the drive pulley 33 is rotatably supported by the main frame F by a pivot shaft 23 extending through the main frame F in the front-rear direction. The pivot 23 is the main frame F
The drive shaft 24a of the servomotor 24 provided in the auxiliary frame Fs on the rear side is connected via a coupling 25.

Then, the drive pulley 33, the first driven pulley 36, the second driven pulley 35, the damper pulley 7, and the third driven pulley 34 are combined into a single endless belt 28. The belt 28 is wound with an elastic urging force that urges the belt 28 toward the belt tension side by the first driven pulley 36. That is, when the servo motor 24 is driven in the direction of the arrow in FIG. 2 at a predetermined rotational speed, when the drive pulley 33 is rotationally driven in the clockwise direction in FIG.・
34 to 36 are integrally driven to rotate in the directions of the arrows shown in FIG.

By the way, the third driven pulley 34, which replaces the water pump pulley 4, has an elliptical shape as shown in FIG. 4, and the center O of the elliptical shape is
The center of rotation P is eccentric in the major axis direction by Δx, and the pulley ratio between the drive pulley 33 and the third driven pulley 34 is set to 1: 2/3. That is, when the drive pulley 33 makes one revolution, the third driven pulley 34 becomes
After 1.5 rotations, the distance from the rotation center P of the third driven pulley 34 to the contact point on the outer periphery of the third driven pulley 34 with which the belt 28 contacts changes like a sine wave.

As mentioned above, the pulley ratio is 1: 2 /
Since the third driven pulley 34 is set to 3, and the third driven pulley 34 has an elliptical shape, one rotation of the driving pulley 33 causes three rotation speed fluctuations in the rotation speed increasing direction to act on the belt 28. . With this configuration, a rotational speed fluctuation equivalent to the rotational speed fluctuation due to the cylinder explosion in the engine E (the third-order component of the rotational vibration acting on the belt 14 that occurs three times per one rotation of the crankshaft) will occur.

Since the pulley ratio is set to 1: 2/3 and the center O of the third driven pulley 34 is eccentric with respect to its rotation center, one rotation of the drive pulley 33 causes the belt 28 to rotate. Therefore, 1.5 times of rotation speed fluctuation in the direction of rotation speed increase will be applied. With this configuration, the rotational speed fluctuations generated by the water pump of the engine E (the rotational vibration acting on the belt 14 is 1.5
Rotational speed fluctuations equivalent to the 1.5th order component that occurs once) will occur.

The behavior generating means corresponds to a structure in which the belt 28 is caused to undergo three rotation speed fluctuations per one rotation of the drive pulley 33 and 1.5 rotation speed fluctuations per one rotation of the drive pulley 33. In other words, this behavior generating means is a non-round structure in which the third driven pulley 34 is elliptical, and an eccentric structure in which the center O of the third driven pulley 34 is eccentric with respect to its rotation center P. It will be composed of and. Further, the rotational speed fluctuation (which can also be referred to as a rotational torque fluctuation) generated on the belt 28 by the behavior generating means corresponds to the behavior generated by the behavior generating means.

Next, the damper pulley 7 will be explained. As shown in FIG. 5, the inner inner pulley 8 and the outer outer pulley 9 are elastic at the front end portions thereof by the hard cushion rubber 10 of the ring. Are combined,
These pulleys 8 and 9 are configured to be relatively rotatable at their rear ends by a needle bearing 11. The inner pulley 8 is fixed to the front end portion of the pivot shaft 22 with a bolt 12, and the belt 28 is hooked on the outer pulley 9.

That is, the outer pulley 9 is rotationally driven by the rotation of the belt 28, and the rotation of the outer pulley 9 is transmitted to the inner pulley 8 via the cushioning rubber 10, and the inner pulley 8 and the pivot shaft 22 are connected to each other. Are integrally rotated. At this time, the rotational speed fluctuation of the belt 28 is damped by the damping action of the cushioning rubber 10, and the pivot shaft 22 is rotationally driven by the damped rotational speed fluctuation. Here, reference numeral 37 is a flywheel having an inertia moment equivalent to the inertia moment of a supercharger (not shown).

Next, the control system of the damper pulley inspection device 20 will be described with reference to FIG. As shown in FIGS. 2 and 4, the optical sensor 40 including the light emitting element 41 and the light receiving element 42 is provided in the vicinity of the third driven pulley 34,
The projection light projected from the light emitting element 41 is reflected by reflection seals (not shown) attached to four points D to G on the outer peripheral side of the third driven pulley 34 at equal intervals, and the reflected light is received by the light receiving element. Four
Light is received at 2, and a rotation speed signal that is a detection pulse signal train is output to the control unit 48.

On the other hand, as shown in FIGS. 2, 3, and 5, the first electromagnetic pickup 43 has a plurality of gear-shaped teeth made of a magnetic material and fixed to the pivot shaft 22 of the damper pulley 7. The tooth portion of the detection disk 38, which is provided in the vicinity of the rotation disk 38 and rotates with the rotation of the pivot shaft 22, is detected, and a rotation speed signal that is a detection pulse signal train is output. Further, the second electromagnetic pickup 44 is provided close to a ring-shaped detection ring 39 having a plurality of teeth made of a magnetic material and fixed to the outer pulley 9 of the damper pulley 7. And outputs a rotation speed signal which is a detection pulse signal train. That is,
The rotation speed signal of the inner pulley 8 is output from the first electromagnetic pickup 43, and the rotation speed signal of the outer pulley 9 is output from the second electromagnetic pickup 44.

These first and second electromagnetic pickups 43,
A frequency / voltage converter 46 connected to the switch 44 via a changeover switch 45 receives a rotation speed signal output from the first electromagnetic pickup 43 or the second electromagnetic pickup 44, and outputs a frequency signal composed of the rotation speed signal. Is converted into a voltage signal and output. The fast Fourier transformer 47 connected to the frequency / voltage converter 46 receives the voltage signal supplied from the frequency / voltage converter 46,
Analysis is performed for each vibration frequency component, and the rotation speed fluctuation value (magnitude of rotation speed fluctuation) of each vibration frequency, that is, the rotation speed fluctuation value of each vibration frequency of the outer pulley 9 or the inner pulley 8 is output (FIG. 7). -See Figure 8).

The control unit 48 is provided with a microcomputer and a plurality of drive circuits, drives the servo motor 24 to rotate at a rotation speed instructed by the operation panel 49, and receives the vibration frequency received from the fast Fourier transformer 47. The spectrum is displayed on the CRT display 50, and the vibration frequency spectrum received from the fast Fourier transformer 47 is printed out by the printer 51. Further, in response to the changeover signal from the operation panel 49, the changeover switch 45 is set to the first electromagnetic pickup 43.
Side or the second electromagnetic pickup 44 side.

Next, the operation of the damper pulley inspection device 20 configured as described above, including the inspection method of the damper pulley 7, will be described. When the start switch is operated and the rotation speed of, for example, 600 rpm corresponding to the idling state is instructed from the operation panel 49,
Servo motor 2 controlled by control unit 48
4 is driven to rotate at a rotation speed of 600 rpm. As a result, the rotation of the drive pulley 33 causes the pulleys 7 and 34 to 36 to be integrally rotated via the belt 28. Here, the control unit 48 keeps the servomotor 24 constantly moving based on the rotation speed signal from the optical sensor 40.
The drive is controlled so as to be 0 rpm.

At this time, by the action of the behavior generating means provided on the third driven pulley 34, the driving pulley 33 is moved to the 1st position.
Each rotation, the belt 28 undergoes three rotation speed fluctuations equivalent to three rotation speed fluctuations due to cylinder explosion per crankshaft rotation, and 1.5 rotation speeds per crankshaft rotation due to the water pump. Rotational speed fluctuations equivalent to the fluctuations occur on the belt 28.

As a result, these rotational speed fluctuations are transmitted to the damper pulley 7 via the belt 28, and when the selector switch 45 is switched to the second electromagnetic pickup 44 side, the outer pulley 9 of the damper pulley 7 is changed.
Is input to the frequency / voltage converter 46,
The voltage signal of the rotational speed fluctuation output from the frequency / voltage converter 46 is input to the fast Fourier transformer 47, and the rotational speed fluctuation value of each vibration frequency of the outer pulley 9 output from the fast Fourier transformer 47 is It is output to the control unit 48.

The control unit 48 is a CRT.
For example, as shown in FIG. 7, the display 50 is caused to display the vibration frequency spectrum. In this vibration frequency spectrum, the rotational speed fluctuation value of the rotational vibration having a vibration frequency of about 30 Hz is about 160 mV.
The rotational vibration of z corresponds to the rotational speed fluctuation of three times per one rotation of the drive pulley 33, and corresponds to the third component of the rotational vibration of the engine E. On the other hand, the vibration frequency is about 15Hz
The rotational speed fluctuation value of the rotational vibration of is smaller than the rotational speed fluctuation value of the rotational vibration of about 30 Hz, but the rotational vibration of about 15 Hz is 1.
It corresponds to the fluctuation of the rotational speed of 5 times and corresponds to the 1.5th order component of the rotational vibration of the engine E generated by the water pump of the engine E.

Next, when the selector switch 45 is switched to the side of the first electromagnetic pickup 43, the rotation speed signal of the inner pulley 8 of the damper pulley 7 is frequency / frequency.
The rotational speed fluctuation value of each vibration frequency of the inner pulley 8 that is input to the voltage converter 46 and output from the fast Fourier transformer 47 is output to the control unit 48, and CR
On the T display 50, for example, as shown in FIG.
The vibration frequency spectrum is displayed.

Here, the vibration frequency spectrum of FIG.
As can be seen from the vibration frequency spectrum of FIG. 8, the damping effect of the 1.5th order component of the vibration of the engine E of about 15 Hz is also exhibited by the damping action of the damper pulley 7, but especially the vibration of the engine E of about 30 Hz Three
The next component is attenuated to about 40 mV. When the pass / fail of the damper pulley 7 is determined based on the rotational speed fluctuation value of the third-order component, for example, 5 is set as the pass / fail determination threshold value.
When 0 mV is set, the pass / fail of the damping performance of the damper pulley 7 can be evaluated based on this determination threshold value.

As described above, in the damper pulley inspection apparatus 20, the drive pulley 33, the first driven pulley 36, the second driven pulley 35, the damper pulley 7, and the third driven pulley 34 are V-shaped 6 The crank pulley 3, the idle pulley 6, the power steering pulley 5, the damper pulley 7, and the water pump pulley 4 in the cylinder engine E are mounted in corresponding positional relations, and the drive pulley 33 can be rotationally driven at various rotational speeds. The servo motor 24 is provided.

Then, the behavior generating means (behavior generating means having a non-round structure and an eccentric structure) provided on the third driven pulley 34 causes the engine E to pass through the third driven pulley 34 to the belt 28. Behavior (rotational speed fluctuation) that is equivalent to that generated in, especially rotational vibration of engine E of 1.5
The inner pulley 8 of the damper pulley 7 and the outer pulley are configured to generate the second component (rotational vibration due to the water pump) and the third component (rotational vibration due to the cylinder explosion) through the control system device shown in FIG. Since the vibration frequency spectrum of the pulley 9 can be created, the damper pulley 7 is not attached to the engine E under the same conditions as when the damper pulley 7 is attached to the engine E.
The performance of can be inspected with high accuracy and efficiency, and its pass / fail can be easily determined.

Next, various modifications of the above embodiment will be described. 1] The non-circular structure in the behavior generating means is not limited to the elliptical structure, and a non-round structure such as a triangular circle or a quadrangular circle may be applied depending on the model of the engine E and the pulley ratio. You can also The pulley ratio between the drive pulley 33 and the third driven pulley 34 can be changed according to the model of the engine E. For example, the third driven pulley 34
If the in-line four-cylinder engine is targeted as an oval-shaped vehicle, the pulley ratio is set to 1: 1. 2] In the above embodiment, the case where the behavior generating means is provided in the third driven pulley 34 has been described as an example, but the behavior generating means may be provided in the first driven pulley 36 or the second driven pulley 35. Is. Further, it goes without saying that the present invention can be implemented in a mode in which various other modifications are added to a part of the above-mentioned embodiment.

[Brief description of drawings]

FIG. 1 is a schematic front view of a V-type 6-cylinder engine.

FIG. 2 is a front view of a damper pulley inspection device.

FIG. 3 is a side view of a damper pulley inspection device.

FIG. 4 is a partially enlarged front view of a third driven pulley.

5 is an enlarged view taken along the line AA of FIG.

FIG. 6 is a block diagram of a control system of the damper pulley inspection device.

FIG. 7 is a diagram of a vibration frequency spectrum of an outer pulley of a damper pulley.

FIG. 8 is a diagram of a vibration frequency spectrum of an inner pulley of a damper pulley.

[Explanation of symbols]

 1 V type 6 cylinder engine 3 Crank pulley 4 Water pump pulley 5 Power steering pulley 6 Idle pulley 7 Damper pulley 8 Inner pulley 9 Outer pulley 20 Damper pulley inspection device 24 Servo motor 28 Belt 33 Drive pulley 34 Third driven pulley 35 2nd driven pulley 36 1st driven pulley 46 Frequency / voltage converter 47 Fast Fourier transformer

Claims (8)

[Claims] 1. An inspection apparatus for inspecting the performance of a damper pulley for an engine, comprising: the damper pulley, a drive pulley in place of a crank pulley of the engine, a rotary drive means for rotationally driving the drive pulley, A plurality of driven pulleys that replace the plurality of actual driven pulleys driven by a crank pulley; and a power transmission member that is wound around the damper pulley, the drive pulley, and the plurality of driven pulleys. Of the driven pulley, which is provided in any one of the driven pulleys of the above, and is provided with a behavior generation means for generating a behavior equivalent to the behavior generated in the crank pulley and the plurality of actually driven pulleys in the engine. apparatus. 2. The damper pulley inspection device according to claim 1, wherein the pulley ratio between the drive pulley and the driven pulley provided with the behavior generating means is set based on a model of the engine. . 3. The damper pulley according to claim 2, wherein the behavior generating means includes an eccentric structure in which a driven pulley provided with the behavior generating means is eccentric with respect to a rotation center of the driven pulley. Inspection equipment. 4. The damper pulley inspecting device according to claim 2, wherein the behavior generating means includes a non-true circular structure in which a driven pulley provided with the behavior generating means has a non-true circular shape. 5. The damper pulley inspecting apparatus according to claim 3, wherein the behavior generating means includes a non-true circular structure in which a driven pulley provided with the behavior generating means is configured in a non-true circular shape. 6. The damper pulley inspection apparatus according to claim 5, wherein the non-true circular structure has a configuration in which a driven pulley provided with a behavior generating means has an elliptical shape. 7. The engine is a V-type 6 cylinder engine, the pulley ratio of the drive pulley and the driven pulley provided with the behavior generating means is set to 1: 2/3, and the non-round structure. The damper pulley inspection apparatus according to claim 6, wherein the damper pulley inspection apparatus is configured to generate a behavior corresponding to the explosion of each cylinder of the engine. 8. A damper pulley inspection method for inspecting the performance of an engine damper pulley, wherein the damper pulley is attached to a damper pulley inspection device, and the damper pulley is inspected by the damper pulley inspection device. The rotational speed of the damper pulley is rotationally driven with a fluctuation equivalent to that of the damper pulley, the rotational speed of at least the output member of the damper pulley is detected with high accuracy by the detection means, and the detected signal is analyzed by the fast Fourier transformer to obtain the damper. A method for inspecting a damper pulley, which comprises inspecting a damping performance of a damper pulley by obtaining a vibration frequency spectrum of an output member of the pulley.