JPH0674868A - Device for measuring engagement transfer error of gear transfer mechanism - Google Patents

Abstract

PURPOSE:To measure a pure engagement transfer error by preventing vibration from a motor side from affecting the measurement of the engagement transfer error between a drive gear and a follower gear of a gear transfer mechanism to be measured. CONSTITUTION:In a device for measuring the engagement transfer error of both gears while driving a drive gear 52 of a gear transfer mechanism 50 by an input side motor 16 and giving a rotary load to a follower gear 54 by an output side motor 36, the input side motor 16 is connected to a rotary angle detector 24 of the drive gear 52 via a fluid joint 20. Then, the output side motor 36 is connected to a rotary angle detector 44 of the follower gear 54 via an inertial body 40, thus separating the mechanical connection relationship of vibration system between the gear transfer mechanism 50 and both motor sides 16 and 36.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear transmission error measuring device for a gear transmission mechanism such as a final reduction gear for a vehicle.

[0002]

2. Description of the Related Art FIG. 4 is a plan view showing an example of a meshing transmission error measuring device. As you can see from this drawing,
The rotation of the input-side motor 60 is transmitted to the drive gear 52 of the gear transmission mechanism 50, which is an object to be measured, via the rotary encoder 62 and the elastic coupling 64 made of rubber or resin. In addition, the gear transmission mechanism 50
The rotational force of the output side motor 70 is transmitted to the driven gear 54 via the elastic coupling 74 and the rotary encoder 72. And both gears 52, 5
In order to measure the meshing transmission error of No. 4, the driving gear 52 is rotated by the input side motor 60, and both gears 52, 54 are rotated by meshing while applying a rotational load to the driven gear 54 by the output side motor 70. . In this state, both gears 52,
The rotational phase angle of 54 is set to the rotary encoder 6 described above.
2, 72 are respectively detected to calculate the mutual phase difference, and thereby the mesh transmission error of both gears 52, 54 is obtained. In addition, each of the elastic couplings 64, 74 described above
Is used for the purpose of separating the mechanical connection between the gear transmission mechanism 50, which is an object to be measured, and the input side motor 60 or the output side motor 70.

[0003]

However, although the spring constant of rubber or the like, which is the material of the elastic couplings 64 and 74, is smaller than that of steel or the like, in reality, the mechanical connection of the vibration system can be separated. It doesn't get smaller. Therefore, the vibration system of the gear transmission mechanism 50 and the two motors 60, 70 cannot be separated, and the measurement of the mesh transmission error of the gear transmission mechanism 50 is affected by the vibration on the motor side, so that the pure mesh transmission error The measurement was difficult.

The technical problem of the present invention is to separate the mechanical connection relationship of the vibration system between the gear transmission mechanism, which is the object to be measured, and the motor side so that the drive gear and the driven gear of this gear transmission mechanism are separated. It is possible to prevent the vibration from the motor side from affecting the measurement of the meshing transmission error and enable the pure measurement of the meshing transmission error.

[0005]

In order to solve the above problems, a gear transmission error measuring device for a gear transmission mechanism according to the present invention is constructed as follows. That is, the drive gear of the gear transmission mechanism is driven by the input side motor, and both gears are meshed and rotated while applying a rotational load to the driven gear by the output side motor, and the rotation phase angle of both gears is detected by each rotation angle detector. In an apparatus for measuring a meshing transmission error by detecting and calculating a mutual phase difference, the input side motor is connected to a rotation angle detector of a drive gear through a fluid coupling, and the output side motor is Is connected to the rotation angle detector of the driven gear via an inertial body.

[0006]

According to this structure, the mechanical connection of the vibration system between the drive gear of the gear transmission mechanism and the input side motor is separated by the fluid coupling. Also, the influence of torque fluctuation (vibration) of the output side motor on the driven gear of the gear transmission mechanism is cut off by the flywheel. As a result, the meshing transmission error between the drive gear and the driven gear can be measured without being affected by the vibrations on both motor sides.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a plan view showing a meshing transmission error measuring device of a final reduction gear (differential device) 50 which is one of gear transmission mechanisms in a vehicle. This device has one input side base 1 arranged orthogonally on a plane.
0 and both output side bases 30 are provided. Moreover, a support table 48 for setting the final reduction gear 50, which is an object to be measured, is arranged at the intersection of the input side base 10 and the both output side bases 30. This final reduction gear 50 has its drive gear 52 (drive pinion)
The shaft of the driven gear 54 toward the input side base 10 side.
The left and right shafts (side gear shafts) that rotate in conjunction with the (ring gear) are set on the support table 48 with both output side bases 30 facing. Input side base 1
0 has an advance / retreat block 12, and this block 12
Is driven by a motor or the like to move on the rail 14 from the retracted position shown in the drawing toward the support table 48. And this input side base 10
Is the input shaft 18 in the rotary input mechanism A described next.
It is constructed so that it can be moved up and down together with the advancing / retreating block 12 in order to adjust the height.

On the upper surface of the advancing / retreating block 12 in the input side base 10, there is provided a rotation input mechanism A for giving a rotational driving force to the drive gear 52 of the final reduction gear 50. The rotation input mechanism A includes an input side motor 16 and an input shaft 18 that is rotated by driving the motor 16. Further, the input side motor 1 is attached to the input shaft 18.
A fluid coupling 20, a torque meter 22, and a rotary encoder 24 as a rotation angle detector are incorporated in order from the side of 6. The fluid coupling 20 may be a fluid clutch having a characteristic in which the input torque and the output torque are always continuously changed one-to-one, but in the present embodiment, a torque converter having a torque amplifying function is used. There is.

On the other hand, the both output side bases 30 are individually driven by motors or the like to move on the rails 34 from the retracted position shown in the drawing toward the support table 48. This output side base 30
A rotary load mechanism B for applying a rotary load to the driven gear 54 of the final reduction gear 50 is provided on the upper surface of each. Each of these rotary load mechanisms B is connected to the output side motor 3
6 and an output shaft 38 which receives the rotational force through the meshing gear in the gear box 37 when the motor 36 is driven. A torque meter 42 and a rotary encoder 44 as a rotation angle detector are incorporated in the output shaft 38. Moreover, flywheels 40 as inertial bodies are provided on the output shaft 38 between the gear box 37 and the torque meter 42, respectively.

Next, the measurement of the mesh transmission error between the drive gear 52 and the driven gear 54 of the final reduction gear 50 will be described. First, the final reduction gear 50, which is an object to be measured, is set on the support table 48 as described above. Then, the advancing / retreating block 12 of the input side base 10 is moved forward toward the support table 48, and the input side base 10 is moved up and down together with the advancing / retreating block 12 to finally reduce the axial height of the input shaft 18 in the rotary input mechanism A. Align with the axis of the shaft of the drive gear 52 in the machine 50. In this state, the end portion of the input shaft 18 and the shaft end portion of the drive gear 52 are connected to each other as shown by the phantom line in FIG. In parallel with this, the left and right output side bases 30 are also respectively advanced toward the support table 48, and the end portions of the output shafts 38 of the both rotation load mechanisms B are connected to the final reduction gear 50 as shown by phantom lines in FIG. And the shaft end of the driven gear 54 in FIG.

FIG. 2 shows a simplified block diagram of the state in which the rotary input mechanism A and the rotary load mechanism B are connected to the final reduction gear 50 in this way. As is apparent from this drawing, the rotation of the input side motor 16 in the rotation input mechanism A is transmitted to the drive gear 52 of the final reduction gear 50 through the fluid coupling 20, the torque meter 22 and the rotary encoder 24. A rotational load is applied to the driven gear 54 of the final reduction gear 50 by driving the output side motor 36 of the rotational load mechanism B via the flywheel 40, the torque meter 42 and the rotary encoder 44. In this state, the rotational phase angles of the drive gear 52 and the driven gear 54 are respectively detected by the rotary encoders 24 and 44, and the mutual phase difference is calculated by a computer. As a result, the mesh transmission error of both gears 52 and 54 is obtained.

FIG. 3 is a conceptual diagram showing the relationship between the rotation input mechanism A, the rotation load mechanism B, and both gears 52 and 54 of the final reduction gear 50. As is clear from this drawing, the gear 5
In the case of considering the vibration models of 2, 54, the meshing parts of the gears are springs, and the gears 5 of the masses I1, I2 are connected via the springs.
2, 54 can be regarded as being connected. In the present embodiment, the drive gear 52 and the input side motor 1 are
The mechanical connection of the oscillating system with 6 is separated by said fluid coupling 20. Further, the driven gear 54 and the output side motor 3
The vibrating system between 6 and 6 is blocked by the flywheel 40 having a large inertial mass. Therefore, the mesh transmission error between the drive gear 52 and the driven gear 54 is caused by the rotation input mechanism A.
Also, the measurement can be performed without being affected by the vibration from the rotation load mechanism B. In the rotation load mechanism B, it is theoretically possible to use a fluid coupling (torque converter) instead of the flywheel 40.
However, in the meshing transmission error measuring device, the upper limit of the rotation speed of the input shaft 18 is determined in consideration of the natural frequency of the device. In the output shaft 38 in which the gear ratio (reduction ratio) of the final reduction gear 50 is advantageous to this, the rotation speed of the output shaft 38 becomes less than the usage range of the torque converter and cannot be used in the existing one.

[0013]

As described above, according to the present invention, the mesh transmission error between the driving gear and the driven gear of the gear transmission mechanism can be measured without being affected by the vibration from the motor side, and thus the pure mesh transmission error can be obtained. Is measured.

[Brief description of drawings]

FIG. 1 is a plan view of a meshing transmission error measuring device.

FIG. 2 is a configuration diagram showing a simplified meshing transmission error measuring device.

FIG. 3 is a vibration model diagram conceptually showing FIG.

FIG. 4 is a configuration diagram showing a conventional meshing transmission error measuring device.

[Explanation of symbols]

 16 input side motor 20 fluid coupling 24 rotation angle detector (rotary encoder) 36 output side motor 40 inertial body (flywheel) 44 rotation angle detector (rotary encoder) 50 gear transmission mechanism (final reduction gear) 52 drive gear 54 driven gear

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shifumi Sasaoka 2-4-1, Nishishinjuku, Shinjuku-ku, Tokyo Ono Sokki Co., Ltd.

Claims (1)

[Claims] 1. A drive gear of a gear transmission mechanism is driven by an input side motor, and both gears are meshed and rotated while a driven gear is given a rotational load by an output side motor, and rotation phase angles of both gears are respectively rotated. In a device for measuring a meshing transmission error by calculating a mutual phase difference by detecting with an angle detector, the input side motor is connected to a rotation angle detector of a drive gear through a fluid coupling, The meshing transmission error measuring device for a gear transmission mechanism, wherein the output side motor is connected to a rotation angle detector of a driven gear via an inertial body.