JPH0236330A - Device for testing mesh of gear - Google Patents

Abstract

PURPOSE:To simplify the constitution of a device by detecting the change of axle-to-axle distance between a 1st and 2nd gears to be measured and a master gear in a 1st and 2nd periods based on detection output from a meshing period detection part. CONSTITUTION:The master gear 12 is so formed that it is engaged with the 1st and the 2nd gears 40 and 42 to be measured which are different in one of subitems for setting the item of the gear, for example, a tooth-trace direction. The indexes 34a and 34b for detecting position provided on the gear 12 are detected by position sensors 26a and 26b mounted on a master gear supporting part 14 when the gear 12 turns. Then, a displacement detection signal Sa from a displacement sensor 25 and position detection signals Sb and Sc from the sensors 26a and 26b are supplied to a control circuit part 27. While a driving signal Dm is supplied to a motor 16 and a 1st and 2nd tooth-trains 32a and 32b in the gear 12 mesh with the gears 40 and 42 based on gear discrimination signals S1 and S2 and the signals Sa-Sc, the change of the axle-to-axle distance between the gear 12 and the gears 40 and 42 is detected in the circuit part 27 to display 28 a signal Dd for displaying.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a gear mesh test device that performs a mesh test on each of a plurality of gears that differ in at least one of the items that define the specifications of the gears.

(Prior Art) Gears constituting a gear transmission mounted on a vehicle are generally manufactured using a gear cutting machine, etc., and then suffer from circular pitch errors, tooth profile errors, tooth surface scratches, etc. inspection, so-called
A single gear inspection is performed.

Further, as shown in Japanese Patent Application Laid-Open No. 57-108732, a gear meshing device equipped with a rotatable master gear is used to connect a manufactured gear to the master gear, and the master gear to the shaft thereof. We conducted a meshing test in which the master gear was actually engaged and rotated under the conditions that it could move in orthogonal directions, and we measured the movement of the master gear in the direction orthogonal to the axis using a displacement measuring device. Inspections are also conducted on target gears to detect tooth groove run-out due to eccentricity, which was not detected in individual gear inspections.

(Problem to be Solved by the Invention) However, as described above, when a meshing test is performed using a gear meshing device, for example, a plurality of gears with different specifications are tested. In some cases, the master gear in the gear meshing device needs to be replaced according to each gear to be tested, and a displacement measuring device that measures the amount of movement of the master gear A in a direction orthogonal to its axis is required. There is a disadvantage that correction must be performed each time the master gear is replaced.

This inconvenience is caused by a gear meshing device in which multiple master gears, each with different specifications corresponding to the multiple gears to be tested, are in a state in which the gears to be tested can individually mesh with each other. This can be avoided by arranging more than one gear, but in that case, there is a risk that the configuration of the gear meshing device will be significantly complicated and extremely expensive.

In view of this, the present invention is implemented by meshing a plurality of gears with each other in at least one of the items that define the specifications of the gears to a master gear, thereby reducing the distance between the master gear and the gear meshing therewith. A meshing test in which a change in the distance between the shafts is detected by a gear displacement detection unit is performed, and the corresponding master gear is replaced according to each gear to be tested;
Furthermore, since it is unnecessary to calibrate the gear displacement detection unit that measures the amount of movement when the master gear is replaced, it is possible to do so with a relatively simple configuration that can be obtained at a relatively low cost. The purpose of the present invention is to provide a gear A/meshing test device that can perform the following.

(Means for Solving the Problems) In order to achieve the above-mentioned object, a gear meshing test device according to the present invention includes a first tooth row that meshes with teeth of a first gear to be measured, and a first gear to be measured. The measurement gear meshes with the teeth of a second gear to be measured, which has at least one of the items that define the specifications of the gear, and the first tooth row refers to at least one of the items that define the specifications of the gear. The master gear is provided with a master gear in which a different second tooth row is formed in series along the circumferential direction, and the master gear engages with the first gear to be measured. The distance between the shafts between the gear and the first gear to be measured, and the distance between the master gear and the second gear when the master gear is engaged with the second gear to be measured.
a mechanism that makes the distance between the shafts and the gear to be measured variable;
A drive unit that rotationally drives the master gear, and a first period in which the first tooth row meshes with the teeth of the first gear to be measured when the master gear rotates, or the second tooth row meshes with the teeth of the second gear to be measured. The second one that meshes with the gear teeth! Based on the detection output from the meshing period detection section that detects the period between J1 and the meshing period detection section, the change in the center-to-axis distance between the first gear to be measured and the master gear in the first period, or, A gear displacement detection section that detects a change in the inter-axle distance between the second gear to be measured and the master gear in the second period is provided.

(Function) According to the gear mesh test according to the present invention as described above]-According to the device, one master gear corresponds to each of the first gear to be measured and the second gear to be measured. By selectively meshing one master gear with the first gear to be measured and the second gear to be measured, the first gear
A meshing test is performed on each of the gear to be measured A and the second gear to be measured. Therefore, the corresponding master gear is replaced according to each of the first gear to be measured and the second gear to be measured, and the gear displacement whose displacement is measured as the master gear is replaced. With respect to each of the first gear to be measured and the second gear to be measured, based on a configuration that does not require correction of the detection unit and is relatively simple and can be obtained at a relatively low cost. A meshing test will be conducted.

(Example) Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an example of a gear mesh test device according to the present invention. In this example, a pair of shaft member clamping tools 11 abut on both ends of a rotation shaft member (indicated by a dashed line) provided with a gear to be measured, and rotatably support the rotation shaft member.
a and llb are provided, and such a shaft member holding tool 1
For example, the positions of 1a and 11b in the X direction indicated by arrow X are fixed.

Then, the master gear 12, which is to be engaged with the gear to be measured provided on the rotating shaft member to be held by the shaft member holding tools 11a and llb, is connected to the shaft member holding tool 11.
It is rotatably supported by a master gear support part 14, with a shaft 13 parallel to the rotation shaft member held between 1a and llb. master gear 12 no suke 1
3 is connected to the master gear drive shaft 15 within the master gear support portion 14, and
is variable in its protruding length from the master gear support portion 14, and is connected to the motor 16 via a connecting shaft 19 provided with universal joints 17 and 18 at both ends.

The master gear support section 14 is fixed to a movable iron 20 extending in the X direction, and the movable iron 20 is movable in the X direction. The movable rod 20 is provided with a locking portion 21, and a coil spring 23 is compressed between the locking portion 21 and the support member 22, so that the movable rod 20 is attached to the shaft member clamping tool 11a and llb side. It is biased in the X direction toward. In addition, the movable rod 20 has a position detection member 2.
4 is fixed to the position detecting member 24, and the supporting member 2 is fixed to the position detecting member 24 at a position selected according to the gear to be measured.
The movable element 25a of the displacement sensor 25 fixed to the holder 2 is brought into contact with the movable element 25a. The position of the displacement sensor 25 is, for example, between the master gear 12 and the measured gear provided on the rotating shaft member that will be held by the shaft member clamping tools 11a and 11b.
When the gear to be measured and the master gear 12 are engaged and the distance between the shafts is normal, the movable element 25a of the position sensor 25 is located at the center of its movable range. It is selected so that.

Then, the displacement sensor 25 sends out a displacement detection signal Sa according to the position of the movable element 25a.

For example, the master gear 12 engages with at least one of the items that define the specifications of the gear, such as a first gear to be measured and a second gear to be measured, each having a different tooth trace direction. For example, as shown in Figure 2,
A semi-rested portion 12a in which a first tooth row 32a is formed in which teeth 31a whose teeth are straight lines parallel to the axis 13 are arranged at equal intervals over an angular range of approximately 180 degrees along the circumferential direction. and a second tooth 31b whose tooth traces have a predetermined inclination angle with respect to the axis 13 are arranged at regular intervals over another approximately 180 degree angular range along the circumferential direction. It is configured to include a semi-recessed portion 12b in which a tooth row 32b is formed. And the first tooth row 32
The tooth rows a and the second tooth row 32b have processing accuracy according to a predetermined grade required for measurement using the displacement sensor 25, and both of the tooth rows a and the second tooth row 32b have processing accuracy according to a predetermined grade required for measurement using the displacement sensor 25. It is said to be able to mesh with each tooth.

Further, on one end surface of the master gear 12, a position near the boundary parts 33a and 33b between the half-rested part 12a and the half-rested part 12b, specifically, at an end of the half-rested part 12a on the boundary part 33a side. Position detection indicators 34a and 34b made of, for example, a magfoot are disposed at a position corresponding to the tooth 31a and at a position corresponding to the tooth 31b at the end of the half-rested portion 12b on the boundary portion 33b side, respectively. These position detection indicators 34a and 34b
The positions of the master gear 12 in the radial direction are different, for example, the position detection indicator 34a is located closer to the outer circumference than the position detection indicator 34b.

When the master gear 12 rotates, the position detection indicators 34a and 34b provided on one end face of the master gear 12 are detected by the position detection indicators 34a and 34b attached to the master gear support 14, for example, as shown in FIG. It is detected by magnetic position sensors 26a and 26b. The position sensor 26a is arranged at a position corresponding to the position detection indicator 34a, and when the position detection indicator 34a takes a position facing the position sensor 26a, it sends out a position detection signal sb, and the position sensor 26b It is arranged at a position corresponding to the position detection index 34b, and when the position detection index 34b takes a position facing the position sensor 26b, it sends out a position detection signal Sc.

Displacement detection signal Sa obtained from the above-mentioned displacement sensor 25,
The position detection signal sb obtained from the position sensor 26a and the position detection signal Sc obtained from the position sensor 26b are as follows.
Both are supplied to the control circuit section 27. Control circuit section 2
7 further transmits a gear discrimination signal S1 through the signal input terminal 27a when the gear to be engaged by the master gear 12 is the first gear to be measured;
If the gear to be engaged is the second gear to be measured, a gear discrimination signal S2 is supplied. And the control circuit section 27
supplies the drive signal Dm to the motor 16 to rotate it at a predetermined rotational speed, and also outputs the master gear based on the gear discrimination signal S1 or S2 position detection detection amounts sb and Sc and the displacement detection signal Sa. During the period in which the first tooth row 32a of the master gear 12 meshes with the teeth of the first gear to be measured, and the second tooth row 32b of the master gear 12 meshes with the teeth of the second gear to be measured. The displacement of the movable front 20, and therefore the change in the distance between the axes between the master gear 12 and the first gear to be measured, and the distance between the master gear 12 and the second gear to be measured during each period 9. With this configuration, the meshing of the first and second gears to be measured is detected. When the test is carried out and the first gear to be measured is used as the subject of the meshing test, as shown in FIG. It is rotatably supported by a pair of shaft member clamps 11a and llb. This first gear to be measured 40 has a tooth trace l′Jli 40a which is a straight line parallel to the axial direction of the first gear to be measured 40, and the first gear in the master gear 12 The meshing with the row 32a is assumed to be proper meshing, and the master gear 12 is engaged with the first gear to be measured 40 as shown in FIG. With the gear discrimination signal S1 being supplied to the control circuit section 27 through the signal input terminal 27a, the motor 16 is supplied with the drive signal Dm from the control circuit section 27 and is rotated at a predetermined rotational speed. While the gear 12 is rotationally driven, the first gear 40 to be measured is connected to the master gear 1.
It is rotated along with the rotation of 2.

When the first gear to be measured 40 causes a runout of the tooth space due to eccentricity as it rotates, the master gear 12 and the first gear to be measured are adjusted according to the runout of the tooth space. 40 will change, and in this case, the first gear to be measured 40 is assumed to have a fixed position in the X direction, so the master gear 12 14 and the movable iron 20 in the X direction. And, such a master gear 12
The change in the distance between the shafts and the first gear to be measured 40 is
The displacement sensor 25 measures the displacement of the movable iron 20 in the X direction.

In performing a meshing test on the first gear to be measured 40, the control circuit unit 27 detects the position detection signal sb obtained from the position sensor 26a and the position detection signal obtained from the position sensor 26b in accordance with the gear discrimination signal S1. Based on Sc, as shown in FIG. 3, the first tooth row 32a of the master gear 12 is in the first From the time when the master gear 12 starts to mesh with the teeth of the gear to be measured 40, the master gear 12 rotates approximately half a rotation, and the position detection indicator 34b provided on the master gear 12 takes a position facing the position sensor 26b. The period until the first tooth row 32a of the master gear 12 finishes meshing with the teeth of the first gear to be measured 40, that is, the first tooth row 32a of the master gear 12
The shaft between the master gear 12 and the first gear to be measured 40 is detected based on the displacement detection signal Sa obtained from the displacement sensor 25 during this period. Detect changes in distance.

For example, when the detected change in the distance between the shafts is within a tolerance value set according to the range of tooth space runout allowed for the first gear to be measured 40, the first gear to be measured 40 Display signal Dd indicating that the measuring gear 40 is a good product
Furthermore, when the detected change in the distance between the shafts exceeds the allowable value, a signal Dd is generated to indicate that the first gear 40 to be measured is defective, and the signal Dd is displayed. 28. The display section 28 displays whether the first gear to be measured 40 is a good product or a defective product according to the display signal Dd.

In addition, when the second gear to be measured is to be subjected to a meshing test, as shown in FIG. It is rotatably supported by shaft member clamps 11a and llb. This second gear to be measured 42 has a tooth trace having a predetermined inclination angle with respect to the axial direction of the second gear to be measured 42,
Therefore, the teeth 42a are different from @40a in the first gear to be measured 40 in the tooth trace direction, and the meshing with the second tooth row 32b in the master gear 12 is proper meshing. As shown in FIG. 4, the master gear 12 is engaged with the second gear 42 to be measured. And the control circuit section 2
7 through the signal input terminal 27a, the motor 16 receives the drive signal Dm from the control circuit section 27 and is rotated at a predetermined rotational speed, whereby the master gear 12 is rotated. At the same time, the second gear to be measured 42 is rotated in accordance with the rotation of the seventeenth star gear 12.

In such a case, when the second gear to be measured 42 causes a runout of the tooth space due to eccentricity as it rotates, the master gear 12 and the second gear 42 are adjusted according to the runout of the tooth space. The distance between the shafts between the second gear to be measured 42 will change, and in this case, the position of the second gear to be measured 42 in the X direction is fixed, so the master gear 12
However, it moves in the X direction together with the master gear support section 14 and the movable iron 20. Then, such a change in the interaxial distance between the master gear 12 and the second gear to be measured 42 is measured by the displacement sensor 25 as a displacement of the movable rod 20 in the X direction.

In performing the meshing test on the second gear to be measured 42, the control circuit section 27 performs the following in accordance with the gear discrimination signal S2:
Based on the position detection signal Sc obtained from the position sensor 26b and the position detection signal sb obtained from the position sensor 26a, the position detection indicator 34b provided on the master gear 12 is detected by the position sensor 26b, as shown in FIG. A second row of teeth 3 on the master gear 12 in a facing position
2b starts to mesh with the teeth of the second gear to be measured 42, the master gear 12 rotates approximately half a rotation, and the position detection indicator 34a provided on the master gear 12 takes a position facing the position sensor 26a. The second gear to be measured 4 of the second tooth row 32b in the master gear 12
The period until the end of meshing with the second tooth, that is, the period during which the second tooth row 32b of the master gear 12 meshes with the teeth of the second gear to be measured 42, is detected, and the displacement is determined during this period. Based on the displacement detection signal Sa obtained from the sensor 25, a change in the distance between the axes between the master gear 12 and the second gear to be measured 42 is detected.

For example, when the detected change in the distance between the shafts is within a tolerance value set according to the range of tooth space runout allowed for the second gear to be measured 42, the second gear to be measured 42 Display signal Dd indicating that the measuring gear 42 is a good product
Further, when the detected change in the distance between the shafts exceeds the allowable value, a signal Dd is generated to indicate that the second gear 42 to be measured is a defective product, and the signal Dd is displayed. 28. The display section 2 displays whether the second gear to be measured 42 is a good product or a defective product in accordance with the display signal Dd.

As described above, when one master gear 12 is used, the first gear to be measured 40 and the second gear to be measured 42 having different tooth trace directions are meshed with each other. A test is conducted, whereby the run-out of the tooth grooves of each of the first gear 40 and the second gear 42 to be measured is detected, and their quality is determined.

In the above example, the first gear to be measured 40 and the second gear to be measured 42 have different tooth alignment directions, but the gear mesh test device according to the present invention
Regarding two gears to be measured, which are different in at least one of the items that define the specifications of the gears, not limited to those with different tooth trace directions, the meshing test for each is performed on one master gear. This is what is done and what can be done under the conditions that are used. Further, in the above example, the master gear 12 has two types of tooth rows formed in series along the circumferential direction, but the master gear 12 used in the gear mesh test device according to the present invention Gears are not limited to such examples, but three or more types of tooth rows, each of which differs in at least one of the items that define the specifications of the gear, are formed in series along the circumferential direction. In such a case, three or more gears to be measured, each of which differs in at least one of the items defining the specifications of the gears, may be subjected to one meshing test. This is assumed to be carried out wherever the master gear is used.

(Effects of the Invention) As is clear from the above description, according to the gear mesh test device according to the present invention, each of the plurality of gears to be measured differs in at least one of the items defining the specifications of the gears. For each gear to be measured, when the gear to be measured is engaged with the master gear, the change in the center distance between the master gear and the gear to be measured that meshes with the gear to be measured due to the rotation of the gear to be measured is detected by the gear displacement detection unit. A meshing test will be carried out to detect tooth space run-out, etc. for each of a plurality of gears to be measured that differ in at least one of the items that define the specifications of the gears. It is unnecessary to perform the test by replacing the master gear corresponding to each gear to be measured, and by calibrating the gear displacement detection unit in conjunction with the replacement of the master gear. This means that it can be performed with a relatively simple and inexpensive configuration.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an example of a gear mesh test device according to the present invention, FIG. 2 is a perspective view showing an example of a master gear used in the example shown in FIG. 1, and FIGS. 3 and 4 are FIG. 2 is a configuration diagram showing a state in which a meshing test is performed on gears to be measured according to the example shown in FIG. 1; In the figure, lla and llb are shaft member clamps, 12 is a master gear, 14 is a master gear support part, 15 is a master gear drive shaft, 16 is a morph, 20 is a movable rod, 25 is a displacement sensor, 26:3 and 26b is a position sensor, 27 is a control circuit section, 32a is a first tooth row, 32b is a second tooth row,
34a and 34b are position detection indicators, 40 is a first gear to be measured, and 42 is a second gear to be measured. Patent applicant Mazda Motor Corporation Masterzeya

Claims (1)

[Scope of Claims] The first tooth row meshing with the teeth of the first gear to be measured differs from the first gear to be measured in at least one of the items defining the specifications of the gear. A second tooth row that meshes with the teeth of the second gear to be measured is formed in series along the circumferential direction, and a second tooth row that differs from the first tooth row in at least one of the items that define the specifications of the gear. a master gear to be measured; an interaxial distance between the master gear and the first gear to be measured when the master gear engages with the first gear to be measured; is the second above
a mechanism that makes variable the distance between the shafts between the master gear and the second gear to be measured when engaged with the gear to be measured; a drive unit that rotationally drives the master gear; A first period in which the first tooth row meshes with the teeth of the first gear to be measured when the master gear rotates, or the second tooth row meshes with the teeth of the second gear to be measured. a meshing period detection section that detects the second period; and a meshing period detection section that detects the first period based on the detection output from the meshing period detection section.
The change in the distance between the shafts between the first gear to be measured and the master gear during the period, or the change in the shaft distance between the second gear to be measured and the master gear in the second period. A gear meshing test device comprising: a gear displacement detection section that detects a change in the distance between the gears;