JP4594964B2 - Gear noise and vibration inspection device - Google Patents

Description

  The present invention relates to a gear noise and vibration inspection apparatus capable of inspecting the presence or absence of occurrence of gear noise and vibration due to a relative rotational delay of a driven gear with respect to a drive gear in an inspection object which is a two-shaft gear mechanism.

  For example, in Patent Document 1, a driving gear of a gear transmission mechanism is driven by a first motor, and the driven gear and the driven gear are rotated in a meshed state while a rotational load is applied to the driven gear by a second motor, There is disclosed a transmission error measuring device for measuring the meshing transmission error of both gears by detecting the rotational phase angle of both gears with the respective rotation angle detectors and calculating the mutual phase difference.

  In this patent document 1, in order to isolate | separate the mechanical connection of the vibration system between a drive gear and a 1st motor, while providing a fluid coupling, in order to interrupt | block the vibration system between a driven gear and a 2nd motor It is disclosed to provide an inertial body (flywheel).

JP-A-6-74868

  However, in the transmission error measuring device disclosed in Patent Document 1, the relative rotation delay (meshing transmission error) of the driven gear (driven gear) with respect to the driving gear is measured as a specific phase angle difference (detected value). When the gear transmission mechanism to be measured is assembled to an actual vehicle (installed in an actual machine), it is not suitable for checking whether or not gear noise is generated and whether or not vibration is generated. .

  An object of the present invention is to provide a gear noise and vibration inspection apparatus capable of inspecting whether or not gear noise and vibration are generated in a state substantially equivalent to an actual machine assembled state and capable of preventing transmission of vibration to an inspection target. And

In order to achieve the above object, the present invention holds an inspection object having a driving gear and a driven gear, and generates gear noise and vibration due to a relative rotational delay between the driving gear and the driven gear. A gear noise and vibration inspection device for inspecting presence or absence,
A first power input mechanism that inputs a rotational driving force to the drive gear; and a second power input mechanism that inputs a rotational driving force to the driven gear, the first power input mechanism and the second power input mechanism An apparatus main body provided with a chamber in which the inspection object is set at an intersection;
A holding means provided in the apparatus main body for holding the inspection object;
Gear noise detection means provided in the apparatus main body for detecting gear noise generated from the inspection object;
Vibration detection means provided in the apparatus main body for detecting vibration of the inspection object;
A jig that is provided in the first power input mechanism and transmits a rotational driving force of the first power input mechanism to the inspection object;
With
The first power input mechanism includes a transmission shaft having a reverse tapered hole,
In addition, the jig is provided with a tapered portion that is inserted into the reverse tapered hole portion.

  In the present invention, when the inspection target is set in a room where the first power input mechanism and the second power input mechanism intersect, the rotational driving force of the first power input mechanism is detected via the jig. On the other hand, the rotational driving force of the second power input mechanism is transmitted to the driven gear side of the inspection object. At that time, vibration generated in the inspection object is detected by the vibration detection means arranged in the apparatus main body, and noise generated in the inspection object is detected by the noise detection means.

  Further, the detection signal from the vibration detection unit and the noise detection signal from the noise detection unit are respectively transmitted to a determination mechanism such as a controller, and the determination mechanism includes a preset reference value, the detection signal, and the noise detection. Each signal is compared and judged to be qualified if it is within the allowable range, and judged to be unqualified if it is outside the allowable range.

  When performing such an inspection, according to the present invention, the tapered portion of the jig is inserted into the reverse tapered hole portion provided in the first power input mechanism, whereby the first power input mechanism. It is possible to suitably prevent the vibration from being transmitted to the inspection object side by suppressing the generation of vibration (backlash) at the gap at the connection portion.

  Furthermore, in the present invention, by providing the jig detachably with respect to the first power input mechanism, it can be easily exchanged corresponding to various inspection objects.

  According to the present invention, it is possible to reliably inspect whether or not gear noise is generated from the inspection object and whether or not vibration is generated in a state approximately similar to that at the time of actual use.

  Preferred embodiments of the gear noise and vibration inspection apparatus according to the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a partially cutaway plan view of an upper plane of a gear noise and vibration inspection apparatus (hereinafter simply referred to as an inspection apparatus) 10 according to the present embodiment, and FIG. The inspection device 10 includes a device main body 12 formed in a box shape, a first power input mechanism 14 and a second power input mechanism 16 arranged so as to be substantially orthogonal to each other in plan view, and an action of an actuator (not shown). Below, there is a slider 20 (see FIG. 2) that opens and closes a chamber 18 provided at an intersection of the first power input mechanism 14 and the second power input mechanism 16.

  In the present embodiment, the inspection object of the inspection apparatus 10 is the transfer 22 shown in FIG. As is well known, the transfer 22 is disposed between the transmission 26 and the propeller shaft 28 in the four-wheel drive vehicle 24, and the rotational driving force transmitted from the front side engine 30 to the transmission 26 is directed toward the rear side. introduce.

  As shown in FIG. 1, a drive gear 32 and a driven gear 34 are accommodated in the transfer 22. As will be described later, rotational driving force is input to the drive gear 32 and the driven gear 34 from the first power input mechanism 14 and the second power input mechanism 16, respectively.

  On the first power input mechanism 14 side, as shown in FIG. 2, a holding block 36, which is made of a heavy object and for setting a transfer 22 as an inspection object, is disposed. On the side surface of the holding block 36, there are a plurality of stopper blocks 38 for clamping the transfer 22 to a predetermined position of the holding block 36, and a positioning recess (not shown) for positioning the transfer 22 at a predetermined position. Is provided.

  The stopper block 38 is rotatably provided at one end via a bolt 40, and the transfer block 22 is moved to one side of the holding block 36 by rotating the stopper block 38 at a predetermined angle with the bolt 40 as a fulcrum. It can be locked (see FIGS. 4 and 5).

  The first power input mechanism 14 has a pair of drive gear side motors 42 and 44 and a bearing unit 48. Among these, each motor shaft of the drive gear side motors 42 and 44 has a drive pulley 50, 52 are connected. Further, a driven pulley 56 is connected to the input shaft 54 of the bearing unit 48, and belts 58 and 60 are wound around the driven pulley 56 and the driving pulleys 50 and 52, respectively.

  As shown in FIG. 6, in the bearing unit 48, a spindle 62 is connected to the input shaft 54. That is, the spindle 62 rotates as the rotational driving force is transmitted to the input shaft 54.

  As shown in FIGS. 1, 6, and 7, an inverted tapered hole 64 is provided at one end of the spindle 62. That is, the inner diameter of the reverse tapered hole portion 64 is reduced in a tapered shape as the distance from the tip end surface of the spindle 62 increases.

  A jig 66 is inserted into the reverse tapered hole 64. As will be described later, the jig 66 rotates integrally with the spindle 62, thereby transmitting the rotational driving force of the drive gear side motors 42, 44 to the transfer 22.

  Here, on one side surface of the jig 66 with the flange portion 68 in between, as shown in FIG. 7, the outer diameter gradually increases toward the tip portion corresponding to the reverse tapered hole portion 64 of the spindle 62. A taper portion 70 having a reduced diameter is provided so as to protrude, and a cylindrical projection 72 is formed to protrude from the substantially central portion of the flange portion 68 on the other side surface. A serration 74 is engraved on the outer peripheral surface of the tip of the cylindrical protrusion 72, and the serration 74 meshes with a tooth portion provided on the drive gear 32 of the transfer 22.

  Note that a quadrangular prism-shaped fitting block 76 is formed on the tip end surface of the spindle 62 so as to protrude at positions spaced apart from each other by 180 °. On the other hand, the flange portion 68 of the jig 66 is provided with a fitting notch 78 so as to cut out the flange portion 68 from the outer peripheral side. When the tapered portion 70 of the jig 66 is inserted into the reverse tapered hole portion 64 of the spindle 62, the fitting block 76 is fitted into the fitting notch 78.

  Further, a plurality of through holes 80 are formed in the flange portion 68, and the bolts 82 passed through the through holes 80 are screwed into bolt holes 84 provided in the holding block 36. The jig 66 is firmly fixed to the spindle 62 by the screwing and the fitting notch 78 and the fitting block 76.

  In this case, the tapered portion 70 of the jig 66 is fitted to the reverse tapered hole portion 64 of the spindle 62, thereby preventing misalignment and suppressing the occurrence of vibration, and at the transfer 22 side. It is possible to prevent vibrations from being transmitted.

  As shown in FIG. 1, the second power input mechanism 16 includes a pair of driven gear side motors 88 and 90 and a bearing unit 92. Similarly to the drive gear side motors 42 and 44 and the bearing unit 48 in the first power input mechanism 14, drive pulleys 94 and 96 connected to the motor shafts of the driven gear side motors 88 and 90, and the bearing unit 92. Belts 102 and 104 are wound around driven pulley 100 connected to input shaft 98, respectively.

  A spindle 106 is connected to the input shaft 98 constituting the bearing unit 92. Therefore, the spindle 106 rotates as the rotational driving force is transmitted to the input shaft 98. This is also the same as the first power input mechanism 14.

  The spindle 106 is inserted into the displacement unit 108 (see FIG. 1). As shown in FIGS. 4 and 5, the leg 110 of the displacement unit 108 is slidably mounted on the guide rail 112, while the rod 116 of the cylinder 114 is connected to the leg 110. Has been. As the rod 116 moves forward / backward, the displacement unit 108 and the second power input mechanism 16 including the spindle 106 is displaced along the guide rail 112.

  A first coupling chuck 120 having a diameter larger than that of the spindle 106 is fitted to the tip of the spindle 106. On the other hand, the transfer 22 has a flange 122 formed with a tooth portion that meshes with a tooth portion provided on the shaft portion of the driven gear 34, and the second connecting chuck 124 is fitted to the open end portion of the flange 122. Are combined. The second coupling chuck 124 and the first coupling chuck 120 are coupled via an elastic coupling 126 so that the rotational driving force of the second power input mechanism 16 can be input to the driven gear 34 via the spindle 106. It has become.

  As is well known, the elastic coupling 126 is a coupling joint that effectively absorbs impact, vibration, and the like. Therefore, the vibration and the like are prevented from being transmitted from the second power input mechanism 16 to the driven gear 34 by the intervention of the elastic coupling 126.

  As shown in FIGS. 2, 4 and 5, a vibration sensor 130 for detecting the vibration of the transfer 22 is disposed on the upper side of the holding block 36. It is transmitted to a controller (not shown). Further, a microphone 132 that collects gear noise generated by the engagement of the drive gear 32 and the driven gear 34 provided in the casing of the transfer 22 is provided in a portion close to the holding block 36, and the microphone The noise detection signal from 132 is also transmitted to the controller (not shown).

  The inspection apparatus 10 according to the present embodiment is basically configured as described above, and the operation and effects thereof will be described below.

  First, as shown in FIG. 4, in a state where the chamber 18 where the first power input mechanism 14 and the second power input mechanism 16 intersect is opened, the side surface of the holding block 36 of the first power input mechanism 14 is As shown in FIG. 5, the transfer 22 to be inspected is locked through a plurality of stopper blocks 38. Thereafter, the cylinder 114 (see FIGS. 4 and 5) is urged to move the rod 116 forward, and the second power input mechanism 16 approaches the transfer 22 side along the guide rail 112. Finally, the first connection chuck 120 and the second connection chuck 124 are connected via the elastic coupling 126.

  Further, an actuator (not shown) is urged to displace the slider 20, and the chamber 18 is sealed by the slider 20. The drive gear side motors 42 and 44 and the driven gear side motors 88 and 90 are rotationally driven in a state where the transfer 22 is set in the box-shaped chamber 18 sealed in this way.

  The rotational driving force of the drive gear side motors 42 and 44 of the first power input mechanism 14 is transmitted to the drive gear 32 of the transfer 22 via the input shaft 54, the spindle 62 and the jig 66. At this time, the rotational torque is transmitted from the spindle 62 to the jig 66 via the fitting notch 78 and the fitting block 76 (see FIG. 7).

  On the other hand, the rotational driving force of the driven gear side motors 88 and 90 of the second power input mechanism 16 is transferred via the input shaft 98, the spindle 106, the first connection chuck 120, the elastic coupling 126, and the second connection chuck 124. Is transmitted to the driven gear 34 (see FIG. 1).

  As described above, the rotational driving force is transmitted to the driving gear 32 and the driven gear 34 accommodated in the casing of the transfer 22, so that the driving gear 32 and the driven gear 34 rotate while maintaining the meshed state. To do.

  At that time, a detection signal from the vibration sensor 130 disposed on the upper side of the holding block 36 and a noise detection signal from the microphone 132 adjacent to the holding block 36 are transmitted to a controller (not shown), and the controller The determined reference value is compared with the detection signal and the noise detection signal, respectively, and is determined to be qualified if it is within the allowable range, and is determined to be unqualified if it is outside the allowable range.

  During this inspection, vibration and the like from the second power input mechanism 16 are blocked by the elastic coupling 126 interposed between the first connection chuck 120 and the second connection chuck 124. For this reason, vibrations and noises other than vibrations and noises due to incompatibility of the drive gear 32 and the driven gear 34 are not detected. Further, since the chamber 18 is hermetically sealed, it is possible to prevent external disturbance from being applied to the transfer 22 and detection of external noise as noise. Therefore, the inspection accuracy can be improved.

  As described above, in the present embodiment, whether or not gear noise is generated from the transfer 22 and vibration in a state approximately approximate to that when the transfer 22 to be inspected is assembled to an actual vehicle (when the actual machine is assembled). It is possible to surely check whether or not the above occurs.

  In the present embodiment, the taper portion 70 of the jig 66 is fitted into the reverse tapered hole portion 64 of the spindle 62 in the first power input mechanism 14, so that the spindle 62 and the jig 66 can be connected. The gap at the connecting portion becomes zero, and generation of vibration (backlash) can be suppressed and transmission of vibration to the transfer 22 side can be suitably prevented.

  That is, in the present embodiment, the tapered portion 70 of the jig 66 is formed so as to gradually increase in diameter from the small-diameter portion at the tip to become a large-diameter portion. No gap is generated when the taper portion 70 is connected. On the other hand, for example, when a spline shaft having a circular cross section having a slightly small diameter is spline fitted to a spline hole formed of a circular hole portion, a minute clearance may be generated at the fitting portion. In addition, it is difficult to completely prevent vibration due to the clearance.

  Furthermore, in the present embodiment, various jigs having a tapered portion are prepared, and replacement with a jig selected corresponding to the inspection object is performed, and the inspection object can be easily and quickly changed. can do.

It is a partially cutaway plan view of the upper plane of the gear noise and vibration inspection apparatus according to the present embodiment. FIG. 3 is a perspective view of a main part of the apparatus main body having a chamber provided in a portion where the gear power and vibration inspection apparatus shown in FIG. 1 is configured and where a first power input mechanism and a second power input mechanism intersect. It is a schematic structure figure showing the arrangement state of the transfer built in vehicles. It is a side view of the said 2nd power input mechanism and a holding block. It is a side view which shows the state by which the transfer which is a test object was latched by the some stopper block provided in the said holding block. It is a partially broken side view along the axial direction of the first power input mechanism. It is a perspective view which shows the taper part of the jig | tool provided in the said 1st power input mechanism and inserted by the reverse taper-shaped hole part of a spindle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Gear noise and vibration inspection apparatus 12 ... Apparatus main body 14 ... 1st power input mechanism 16 ... 2nd power input mechanism 18 ... Chamber 20 ... Slider 22 ... Transfer 32 ... Drive gear 34 ... Drive gear 36 ... Holding block 38 ... Stopper block 42, 44 ... drive gear side motor 48 ... bearing unit 54 ... input shaft 62 ... spindle 64 ... reverse taper hole 66 ... jig 70 ... taper 74 ... serration 76 ... fitting block 78 ... fitting notch 88, 90 ... driven gear side motor 92 ... bearing unit 98 ... input shaft 106 ... spindle 108 ... displacement unit 112 ... guide rail 114 ... cylinder 120 ... first connection chuck 124 ... second connection chuck 126 ... elastic coupling 130 ... vibration sensor 132 ... Microphone

Claims (2)

A gear noise and vibration inspection device for holding an inspection object having a drive gear and a driven gear, and inspecting the presence of occurrence of gear noise and vibration due to relative rotation delay between the drive gear and the driven gear,
A first power input mechanism that inputs a rotational driving force to the drive gear; and a second power input mechanism that inputs a rotational driving force to the driven gear, the first power input mechanism and the second power input mechanism An apparatus main body provided with a chamber in which the inspection object is set at an intersection;
A holding means provided in the apparatus main body for holding the inspection object;
Gear noise detection means provided in the apparatus main body for detecting gear noise generated from the inspection object;
Vibration detection means provided in the apparatus main body for detecting vibration of the inspection object;
A jig that is provided in the first power input mechanism and transmits a rotational driving force of the first power input mechanism to the inspection object;
With
The first power input mechanism includes a transmission shaft having a reverse tapered hole,
In addition, the jig is provided with a tapered portion that is inserted into the reverse tapered hole portion ,
Furthermore, a gear noise and vibration inspection device , wherein an elastic coupling is interposed between a transmission shaft constituting the second power input mechanism and the driven gear .   2. The gear noise and vibration inspection apparatus according to claim 1, wherein the jig is detachably provided to the first power input mechanism.

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