JPH10142103A - Testing apparatus for transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a testing apparatus, for a transmission, by which different torques can be given separately to two output shafts of the transmission. SOLUTION: A testing apparatus tests the function of an automatic transmission 1 which is provided with a differential gear 1B which is arranged on the output side of a speed change mechanism 1A and with a first drive shaft 13 and a second drive shaft 15 which are connected to the differential gear 1B. The testing apparatus gives torques to the first drive shaft 13 and the second drive shaft 15 when it tests the function. In this case, a plurality of three-phase inverter motors 18, 19 which give the torques to the first drive shaft 13 and the second drive shaft 15 are connected to the first drive shaft 13 and the second drive shaft 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission testing apparatus used in a vehicle manufacturing process or the like, and more particularly to a transmission for testing the function of a transmission having two output shafts connected to a differential. The test apparatus of the present invention.

[0002]

2. Description of the Related Art Generally, a front-wheel drive vehicle is equipped with a transaxle type transmission. This transmission includes an input shaft connected to a driving force source, a gear transmission mechanism connected to the input shaft, and a final reduction gear disposed on the output side of the gear transmission mechanism, in other words, a differential device, 2 connected to the device
And two output shafts. Such a function test of the transmission is performed using a test device in a manufacturing process of the vehicle.
And the conventional test apparatus is comprised as follows.

[0003] That is, the test apparatus includes a hydraulic cylinder and an electric motor. This hydraulic cylinder and electric motor
Each is connected to two output shafts via a power transmission device including a rotating shaft, a coupling clutch, a belt, a pulley, and the like.
A torque meter is connected to one of the two output shafts.

[0004] When performing various functional tests using the test apparatus having the above configuration, the torque of the hydraulic cylinder or the electric motor must be 2 or less.
The torque of the torque meter is detected in a state where the torque is applied to the three output shafts at a time. In addition, an example of a test apparatus used for testing an automatic transmission is disclosed in Japanese Patent Application Laid-Open No. 4-36443.
No. 8 publication.

[0005]

Incidentally, the two output shafts connected to the differential device have different torque transmission characteristics depending on their length, rigidity, or machining accuracy. In addition, the two output shafts are different when the vehicle is running or stopped. The running resistance acting on the output shaft may be different. However, in the conventional test apparatus, since the torque of the hydraulic cylinder or the electric motor is connected to the two output shafts, the torques applied to the two output shafts are substantially equal. In addition, torque circulation occurs in a path connecting the two output shafts, the differential device, and the power transmission device. For this reason,
In the above test apparatus, torque cannot be applied to the two shafts in a state similar to the actual vehicle state, and there is a possibility that the functional test accuracy of the transmission may be reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a transmission testing apparatus capable of separately applying different torques to two output shafts of a transmission.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention comprises a differential arranged on the output side of a speed change mechanism and two output shafts connected to the differential. A test device for testing the function of a transmission, wherein in a test device for a transmission that applies torque to the two output shafts during the function test, a plurality of torque applying devices that apply torque to the two output shafts are provided. , And are separately connected to the two output shafts.

According to the present invention, it is possible to separately apply different torques to the two output shafts. According to the torque transmission characteristics of the two output shafts, two different torques can be applied to the two output shafts. It can be provided separately to the output shaft, which improves the accuracy of the function test of the transmission.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of an automatic transmission 1 as a transmission and a test apparatus 2, and FIG. 2 is a schematic perspective view of FIG. First, the automatic transmission 1 which is a work
Shows a transaxle type that is applied to a front wheel drive vehicle or a midship vehicle. This automatic transmission 1
The transmission 1A and the final reduction gear connected to the output side of the transmission 1A, in other words, the differential 1B are disposed inside the transmission.

Hereinafter, the configurations of the transmission mechanism 1A and the differential 1B will be described. An input shaft 3 and a counter shaft 4 are arranged parallel to each other, and a counter drive gear 5 attached to the input shaft 3;
The counter driven gear 6 attached to the counter shaft 4 is engaged. A parking gear 7 is attached to the input shaft 3, and a parking pole 8 is provided near the parking gear 7.

The input shaft 3, counter shaft 4, counter drive gear 5, and counter driven gear 6 correspond to a transmission mechanism 1A of the present invention. And
When a shift lever (not shown) is switched to the parking range, the parking pawl 8 is operated to mesh with the parking gear 7.

A differential case 9 is provided inside the automatic transmission 1. A ring gear 10 formed on the outer periphery of the differential case 9 and a drive pinion gear 11 mounted on the counter shaft 4 are meshed with each other.
A pinion gear 12 is integrally formed inside the differential case 9, and a side gear 14 of the first drive shaft 13 and a side gear 16 of the second drive shaft 15 are meshed with the pinion gear 12. here,
First drive shaft 13 and second drive shaft 15
Are arranged on the same axis. The differential case 9,
The ring gear 10, the drive pinion gear 11, the pinion gear 12, the side gear 14, and the side gear 16 correspond to the differential 1B of the present invention.

On the other hand, the test apparatus 2 is configured as follows. An input shaft motor 17 is connected to the input shaft 3, and a three-phase inverter motor 18 is connected to the first drive shaft 13.
, And a three-phase inverter motor 19 is connected to the second drive shaft 15. The three-phase inverter motor 18 and the three-phase inverter motor 19 correspond to the torque applying device of the present invention. Three-phase inverter motor 18
The rotation shaft 20 of the three-phase inverter motor 19 and the rotation shaft 21 of the three-phase inverter motor 19 are arranged on the same axis as the first drive shaft 13 and the second drive shaft 15.

A first torque meter 22 is attached to a connecting portion between the rotating shaft 20 and the first drive shaft 13, and a second torque meter 23 is connected to a connecting portion between the rotating shaft 21 and the second drive shaft 15. Installed.
The first torque meter 22 is for detecting the torque of the first drive shaft 13, and the second torque meter 23 is for detecting the torque of the second drive shaft 15.

Further, a first disk brake 26 including a disk 24 and a caliper 25 is disposed between the first torque meter 22 and the three-phase inverter motor 18 on the rotating shaft 20. On the other hand, the second
A second disc brake 29 including a disc 27 and a caliper 28 is disposed between the torque meter 23 and the three-phase inverter motor 19. The first disc brake 26 and the second disc brake 29 are for inhibiting or suppressing the rotation of the first drive shaft 13 and the second drive shaft 15.

The three-phase inverter motors 18 and 19 are connected to a control panel 30, and the control panel 30 is connected to a power source (not shown). The control panel 30 includes a microcomputer, and controls the rotation speed of the rotating shafts 20 and 21 by controlling the voltage supplied to the three-phase inverter motors 18 and 19, and controls the current supplied to the three-phase inverter motors 18 and 19. Controls the output torque of the rotating shafts 20 and 21.

On the other hand, a first solenoid valve 31 is connected to the first disc brake 26, and a second solenoid valve 32 is separately connected to the second disc brake 29. Further, the first solenoid valve 31 and the second solenoid valve 32 are connected to a hydraulic source 33 such as a pump. Excitation and demagnetization of the first solenoid valve 31 and the second solenoid valve 32 are controlled by the control panel 30, and the first disk brake 26 and the second disk brake 27 are separately engaged and released.

Next, the contents of a test performed by the test apparatus 2 having the above-described configuration using the automatic transmission 1 as a work will be described with reference to a time chart of FIG. First, when the function test of the parking mechanism is not performed, the three-phase inverter motors 18 and 19 are stopped. Also, the first
Disc brake 26 and second disc brake 29
Has also been released.

When performing a function test of the parking mechanism,
The shift lever of the automatic transmission 1 is set to the parking range, and the parking pawl 8 and the parking gear 5 are engaged. Also, the second disc brake 29 is engaged,
The rotation of the second drive shaft 15 is prohibited. Note that the first disc brake 26 remains released.

First, in order to perform a functional test corresponding to the gradient in the forward direction of the vehicle, the three-phase inverter motor 1
8 with respect to the first drive shaft 13 as shown in FIG.
Is applied in the direction of arrow A. Here, the torque applied to the first drive shaft 13 is controlled so as not to exceed a predetermined load. In addition, the rotation speed command of the rotation shaft 20 of the three-phase inverter
pm.

Since the rotation of the second drive shaft 15 is locked as described above, the first drive shaft 1
3 is transmitted to input shaft 3 via pinion gear 12 and ring gear 10, drive pinion gear 11, counter shaft 4, counter driven gear 6, and counter drive gear 5. Here, since the rotation of the input shaft 3 is locked by the engagement of the parking gear 7 and the parking pawl 8, the first drive shaft 1
3 generates a torsional torque.

Therefore, the torque detected by the first torque meter 22 is compared with a preset threshold level, in other words, a threshold value, to determine whether the function of the parking mechanism is good or not. In this embodiment, if the negative detected torque indicated by the solid line is out of the range between the threshold level indicated by the broken line and zero, it is determined that the parking function of the automatic transmission 1 is normal. If the detected torque is in the range between the threshold level and zero, it is determined that the parking function is defective.

On the other hand, when testing the parking function corresponding to the reverse side of the vehicle, the three-phase inverter motor 18 is rotated in the opposite direction to the above, and the first drive shaft 13
, A torque in the direction of arrow B is applied. Then, since the positive torque is detected by the second torque meter 22 by the same operation as described above, the quality of the parking function corresponding to the reverse side is determined in the same manner as described above.

When a stall test is performed by the test apparatus 2, first, both the first disc brake 25 and the second disc brake 29 are engaged to rotate the first drive shaft 13 and the second drive shaft 15. Lock tightly. When the input shaft motor 17 is driven to input a torque to the input shaft 3, a torsional torque is generated in the first drive shaft 13 and the second drive shaft 15, so that the first torque meter 22 and the second torque meter 23 detects the torque in the stalled state.

Further, when performing another driving test,
First disc brake 25, second disc brake 29
Are released, and the input shaft motor 17 is driven to input a positive torque to the input shaft 3. Then, the three-phase inverter motors 18 and 19 are rotated to apply a negative torque corresponding to the running resistance to the first drive shaft 13.
To the first drive shaft 13 and the second drive shaft 15 due to the difference between the positive torque and the negative torque applied to the first drive shaft 13 and the second drive shaft 15. The torque is detected by the first torque meter 22 and the second torque meter 23.

The first drive shaft 13 and the second drive shaft 15 of the automatic transmission 2 have different torque transmission characteristics depending on their length, rigidity, or machining accuracy. In addition, the running resistance acting on the output shafts of the first drive shaft 13 and the second drive shaft 152 may be different in a running state or a stopped state of the actual vehicle.

Here, in the test apparatus 2, the three-phase inverter motors 18 and 19 are separately provided on the first drive shaft 1.
Since they are connected to the third drive shaft 15 and the second drive shaft 15, it is possible to separately apply different torques to the first drive shaft 13 and the second drive shaft 15.

Therefore, the torque applied to the first drive shaft 13 and the second drive shaft 15 is set to an arbitrary value in accordance with the torque transmission characteristics or the torsional torque acting in the running or stopped state of the actual vehicle. In addition, the torque applied to the first drive shaft 13 and the second drive shaft 15 does not circulate. Therefore, a state similar to the actual vehicle state can be realized,
The function test accuracy of the automatic transmission 1 is improved.

Further, according to the test apparatus 2, when performing a function test of the parking mechanism, the three-phase inverter motor 1
Since the torque 8 is applied to the first drive shaft 13, the torque and the rotation speed applied to the first drive shaft 13 can be finely and accurately controlled by electrically controlling the three-phase inverter motor 18, The accuracy of the function test of the parking mechanism is improved.

Further, since the three-phase inverter motor 18 is also used for a plurality of types of tests including a function test of the parking mechanism, the rotating shaft 20 of the three-phase inverter motor 18 and the first drive shaft 13 are arranged on the same axis. It is possible to do. Further, the rotating shaft 21 of the three-phase inverter motor 19 and the second drive shaft 15 are arranged on the same axis. Therefore, the first drive shaft 1
The arrangement space of the components in the radial direction of the third and second drive shafts 15 is suppressed, and the test apparatus 2 is moved to the first
Drive shaft 13 and second drive shaft 15
In the radial direction as much as possible.

Further, in this embodiment, the rotating shaft 20 of the three-phase inverter motor 18 and the first drive shaft 13 are directly connected without any special power transmission device. For this reason, the output torque of the three-phase inverter motor 18 is efficiently transmitted to the first drive shaft 13 without generating vibration or slippage between the rotating shaft 20 and the first drive shaft 13, thereby reducing the torque transmission loss. Can be suppressed. Therefore, the test accuracy of the parking mechanism is further improved.

The motor used in the present invention may be any motor other than a three-phase inverter motor as long as the rotating shaft can rotate forward and reverse and can output a predetermined low torque in a state where the rotation is stopped. For example, a servomotor can be applied. In addition, it is also possible to arrange a power transmission device such as a pulley, a belt, a chain, and a gear between the plurality of torque applying devices and the two output shafts. Furthermore, the test apparatus of the present invention is applicable to a manual transmission.

[0033]

As described above, according to the present invention, it is possible to separately apply different torques to two output shafts, and according to the torque transmission characteristics of the two output shafts,
The same torque as in the actual vehicle state can be separately applied to the two output shafts, and the accuracy of the function test of the transmission is improved.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a configuration of an automatic transmission test apparatus and an automatic transmission to be tested according to the present invention.

FIG. 2 is a perspective view showing a configuration of an automatic transmission test device and an automatic transmission to be tested according to the present invention.

FIG. 3 is a time chart showing an operation state of the test apparatus and a state of torque detected by the test when a parking test is performed by the test apparatus shown in FIGS. 1 and 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic transmission 1A Transmission mechanism 1B Differential apparatus 2 Test apparatus 13 First drive shaft 15 Second drive shaft 18, 19 Three-phase inverter motor

Claims (1)

[Claims] 1. A test apparatus for testing the function of a transmission having a differential arranged on the output side of a transmission mechanism and two output shafts connected to the differential, wherein A transmission testing device that applies torque to the two output shafts, wherein a plurality of torque applying devices that apply torque to the two output shafts are separately connected to the two output shafts; Characteristic transmission test equipment.