JPH0477259B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in the mechanical part of a testing device for meshing gears.

Conventional technology This type of gear test involves measuring the sound and vibration generated while rotating gears in mesh with each other.
Alternatively, by analyzing it, it is performed to check for the presence of dents or to measure the transmission error between the two shafts, in order to determine one or more of the various meshing behaviors that occur in the meshing state.

The equipment used for this test consists of a drive shaft and a driven shaft, on which the gears can be attached and detached, with a distance between the shafts corresponding to the gears to be meshed. (distance is adjustable), a sensor part selected according to the desired meshing behavior, connected to the mechanism part or its vicinity, or to the shaft, and the output of that sensor are displayed. , and the measurement circuit section to be analyzed.

In this case, for example, to conduct a transmission error test, the gear pairs to be tested are fixed and meshed at predetermined gear attachment/detachment points on the drive shaft and driven shaft, respectively, and a rotary encoder is connected to the end of each shaft as a sensor. Generates a pulse output every time the shaft rotates by a certain angle. In the measurement circuit section, each pulse output is first introduced into a frequency divider and divided by the number of teeth of the other side that mesh with each other, and then sent to a phase difference measuring device to measure the phase difference between the two frequency-divided pulse outputs, i.e. It converts into an output proportional to the transmission error between both gears, stores it in memory, and finally displays it or records it on recording paper to judge whether it is good or bad and perform various analyses.

Similarly, when measuring meshing noise, a microphone is used as a sensor to detect the sound, and the output is analyzed by rotational order ratio to determine what is causing the generated sound and whether the power is within the allowable value. Examinations will be conducted regarding such matters.

Problems to be Solved by the Invention Recently, gearboxes that actually support the gear systems subjected to these tests, such as automobile transmission cases in particular, have been required to be lightweight. Due to the balance with the overall rigidity, if the load torque is large, the case may be slightly twisted.

In the prior art, the test was carried out by always keeping the two axes parallel, and there was a problem in this, for example, that even if a beat sound was measured, the measurement would differ from the actual conditions.

Method for Solving the Problems In order to solve the above-mentioned problems, the present invention is designed to reproduce the same deformation state as in the actual case, even though the mechanical part of the gear testing device itself has a simple configuration. This is what I did.

That is, the present invention provides a mechanism part in which a drive shaft and a driven shaft on which gears can be freely attached and detached are arranged with a distance between the shafts corresponding to the meshing gears, and a sensor part in the mechanism part that detects the meshing behavior of the gears. and a measurement circuit section for the sensor output, the support for either the drive shaft or the driven shaft of the mechanism section is perpendicular to the plane containing both shafts from the gear attachment/detachment point. The other shaft is supported on a support that rotates around a line drawn on the plane so as to be rotatable on the plane, and the support for the other shaft is on the plane, perpendicular to the axis, and passes through the gear attachment/disconnection point. It is supported on a support that rotates about a line, and is rotatable in a direction perpendicular to the plane.

Effect In the above, the deviation of the driving shaft and driven shaft in the plane direction of the gear system incorporated in the actual case, the so-called intersection angle of both axes, and the deviation in the direction orthogonal to the plane are both known. If so, the supports of the respective shafts are rotated in accordance with the deviation, and in this state they are fixed to the respective supports and integrated.

Next, the gears are fixed to the gear attachment/detachment points on each shaft, and both gears are meshed together.Then, the drive shaft is driven, and a load corresponding to the actual conditions is applied to the driven shaft. Outputs are taken out from sensors installed in advance in response to the intended meshing behavior.

Thereby, the drive shaft and the driven shaft are maintained in a state with a predetermined deviation based on actual conditions, and the meshing behavior of the test gear is determined under these conditions.

Even if the misalignment of both axes when installed in an actual case is not known, for example, the beat sound collected under that actual condition and the beat obtained under various misalignment conditions of both axes given in the test equipment. By analyzing the correspondence with sound, it is also possible to measure the deviation between the two axes that occurs in actual conditions.

Example In FIG. 2 showing a perspective view of a mechanism part, 30
is a cross-sectional surface plate, and a dovetail groove convex portion 34 is formed on the left side of the horizontal portion 33;
4 includes a moving member 3 that supports a supporting body 20 to be described later.
The left end of the moving member 32 is engaged with the tip of the feed screw rod 36 which is screwed into the receiving portion 35 protruding from the left end of the horizontal portion 33 of the surface plate. The moving member 32 can be moved in the horizontal direction by rotating the threaded rod 36, and can be fixed to the horizontal portion 33 of the surface plate at any moving position by a clamp mechanism (not shown).

A rod-shaped projection (not shown) is provided on the moving member 32 and projects upward, and the projection is attached to the bed portion 22 of the support body 20 that supports the driven shaft 21.
The bed portion 22 is inserted into the movable member 32 and is rotatable on the movable member 32 around the protrusion 37, and the bed portion 22 is fixed to the movable member 32 at any rotational position by a clamp mechanism (not shown). It's becoming possible.

A driven shaft 2 is mounted on the bed portion 22 of the support 20.
1 is supported via bearings 23 and 24 with the attachment/detachment point of gear 2 aligned with the center line of the protrusion. Although not shown, the bearing 24
The end of the driven shaft 21 that protrudes outward from the shaft is connected to a load device via a belt transmission mechanism.

On the other hand, a bar-shaped protrusion (not shown) is provided on the vertical portion 31 of the surface plate 30 to protrude leftward, and the protrusion is inserted into the bed portion 12 of the support body 10 supporting the drive shaft 11. , its bet part 1
2 is rotatable on the vertical portion 31 about the protrusion, and can be fixed to the vertical portion 31 at any rotational position of the bed portion 12 by a clamp mechanism (not shown).

A drive shaft 11 is supported on the bed portion 12 of the support body 10 via bearings 13 and 14 with the attachment/detachment point of the gear 1 aligned with the center line of the protrusion. Although not shown, the bearing 13
The end of the drive shaft 11 that protrudes outward from the drive shaft 11 is connected to a motor via a belt transmission mechanism.

Further, the bed portion 1 of each of the supporting bodies 10 and 20 is
On one side of 2, 22, the base thereof is connected to the vertical portion 3.
1. The spindles of linear gauges (not shown) fixedly attached to the movable members 32 are in contact with each other, so that the rotation angles of the respective bed portions 12 and 22 can be determined.

FIG. 1 is a diagram showing a model of the movable parts in the above embodiment. The drive shaft 11 and the driven shaft 21 are arranged on the XY plane, and one driven shaft 2
When the drive shaft 11 rotates, the projection 37 located on the Z axis extending perpendicularly downward to the XY plane from the attachment/detachment point of the gear 2 becomes the center, and when the other drive shaft 11 rotates, the projection 37 is centered on the The center is a protrusion 38 placed on the Y-axis that passes through the attachment/detachment point of the gear 1 and is perpendicular to the drive shaft 11, and the distance between the two shafts 11 and 21 is determined by the moving member 3 (not shown in this figure).
2, the driven shaft 21 is moved in the Y-axis direction.

In the above, the driving shaft 11, the driven shaft 2
Fix gears 1 and 2 to the gear attachment/detachment points of gear 1, respectively,
The moving member 32 is moved to obtain an interaxial distance corresponding to both gears 1 and 2, and in this state, the moving member 32 is clamped to the horizontal portion 33 of the surface plate 33. Subsequently, the bed portion 22 is rotated while monitoring the display on one of the linear gauges, and the bed portion 22 is clamped to the moving member 32 in a state that the value coincides with a predetermined value. As a result, the drive shaft 11 and the driven shaft 21 are maintained at a predetermined intersection angle. Next, while monitoring the display on the other linear gauge, the bed portion 12 on the drive shaft 11 side is rotated, and the bed portion 12 is clamped to the vertical portion 31 of the surface plate in a state that the value coincides with a predetermined value. As a result, the drive shaft 11 and the driven shaft 21 are held at the above-described intersecting angle and at a predetermined inclination with respect to the direction orthogonal to the intersecting angle.

After the above settings are completed, the motor is driven, a predetermined load is set on the load device, and a meshing test is performed.

In the above embodiment, the case where each bed part 12, 22 is manually rotated is illustrated, but it is also possible to control a predetermined rotation angle by a pulse signal using a combination of a pulse motor and a ball screw, etc., for example. You can also do this.

Effects of the Invention As described above, the present invention allows one of the driving shaft and the driven shaft to freely rotate in the direction where both axes intersect, and the other to freely rotate in the direction orthogonal to the plane thereof, and to set the shaft as appropriate. As a result, actual meshing conditions can be easily reproduced and the reliability of test results can be increased.

[Brief explanation of the drawing]

FIG. 1 is a model diagram showing the operation of an embodiment of the present invention, and FIG. 2 is a perspective view of the embodiment of the present invention. 11: Drive shaft, 12: Driven shaft, 10, 20: Support body, 31: Vertical part of surface plate, 32: Moving member,
37, 38: Protrusion.

Claims (1)

[Claims] 1. A mechanism part in which a drive shaft and a driven shaft on which gears can be freely attached and detached are arranged with a distance between the shafts corresponding to the meshing gears, a sensor part for detecting the meshing behavior of the gears in the mechanism part, and the sensor. In a gear testing device consisting of an output measuring circuit section, the support of either the driving shaft or the driven shaft of the mechanical section is a line drawn perpendicularly from the gear attachment/detachment point to the plane containing both axes. The other shaft is supported on a support that rotates around the center and is rotatable on the plane, and the support for the other shaft is on the plane, perpendicular to the axis, and centered on a line passing through the gear attachment/disconnection point. A gear testing device characterized in that it is supported on a rotating support and is rotatable in a direction perpendicular to the plane.