JP2510171Y2 - Automatic transmission test equipment - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to a test apparatus capable of continuously performing various tests for an automatic transmission of a vehicle.

B. Outline of the Invention The present invention is a test apparatus for continuously performing various tests on a vehicle automatic transmission. A brake is mounted between the rotating shaft of the dynamometer and the oscillating machine, and the oscillating machine is equipped with a brake. By installing the parking operation confirmation device on the protruding torque arm, the output shaft of the automatic transmission is connected to the dynamometer, and various functions can be used by selectively using the functions of the brake, the parking operation confirmation device, or the dynamometer. It was designed to be tested.

C. Conventional Technology Conventionally, testing of automatic transmissions for automobiles has been performed using a dedicated test unit for each test item because of the wide variety of tests.

The parking operation test of the automatic transmission used a dedicated test unit as illustrated in FIGS. 4 and 5. In the test unit shown in FIG. 4, the input shaft torque meter 3 is connected to the main shaft 2 of the motor 1. An automatic transmission 5 as a test object (workpiece) is attached to the rotary shaft 4 of the input shaft torque meter 3. A parking operation confirmation device 7 illustrated in FIG. 5 is attached to the output shaft 6 of the automatic transmission 5.

The parking operation confirmation device 7 has a 3-position hydraulic cylinder 8, an operation shaft 9 and a swing member 10.

The working shaft 9 is supported by a pair of bearings 11 and 12 so as to be swingable in the axial direction.

One end of the operating shaft 9 is connected to the tip of a rod 14 of the hydraulic cylinder 8 via a load cell 13.

Limit switch actuating portions 15, 16 and 17 each having a predetermined width are provided at predetermined three positions on the operating shaft 9. A neutral point limit switch 18, a backward end limit switch 19, and a forward end limit switch 20 are arranged on the three limit switch actuating portions 15, 16 and 17, respectively.

An engagement pin 21 is provided on the operating shaft 9 so as to project therefrom. Engagement pin 21
Is inserted into an elongated hole 22 formed at the free end of the rocking member 10.

The rocking member 10 has its root end fitted to the output shaft 6 and is keyed so as to rotate integrally.

In the parking operation test performed by the above-mentioned dedicated unit, the lock performance of the output shaft 6 is confirmed by setting the manual lever position of the automatic transmission 5 to the parking range (P). The conditions for the parking operation test are that the output shaft 6 is set to 0 rotation and the motor 1 is rotated at a rotation speed equivalent to idling (for example, 600 rpm).

The parking operation test method is performed by operating the hydraulic cylinder 8 to apply forward or reverse rotation torque to the output shaft 6 via the operating shaft 9 and the swing member 10.

The judgment of the test is that the rear end limit switch 19 indicates that the cylinder of the hydraulic cylinder 8 has moved to the stroke end.
Alternatively, when the forward end limit switch 20 detects it, it is determined to be defective.

At the same time, this test can also confirm whether the specified torque is actually applied by the load cell 13. Therefore, this test can eliminate the cause of the confirmation failure due to the abnormality on the test apparatus side.

Next, the stall torque measurement test and the drag torque measurement test will be described with reference to FIG.

FIG. 6 exemplifies the configuration of a dedicated unit for carrying out the above test. 1 is a motor, 2 is a main shaft, 3 is an input shaft torque meter, 4 is a rotary shaft, 5 is an automatic transmission, and 6 Is the output shaft. In the test unit shown in FIG. 6, the output shaft 6 is connected to the output shaft torque meter 23.
Is added to the rotary shaft 24 of the output shaft torque meter 23.
It is configured by adding a disc brake 25 to the.

The stall torque measurement test is performed to confirm the converter performance at the stall point.

The stall point is where the converter input / output rotation ratio becomes 0, that is, the output shaft rotation speed becomes 0.

The condition of this test is to set the manual lever position of the automatic transmission 5 to the back (R) range,
The condition is that the output shaft 6 is locked by the disc brake 25 and the rotation of the motor 1 is increased to, for example, 600 to 1500 rpm.

In this test, the output shaft torque is measured by the output shaft torque meter 23 under the above conditions, and the propriety thereof is determined.

The drag torque measurement test is a test performed to confirm the power loss amount of the oil pump and the drag torque loss amount inside the transmission (which is almost 0 in the normal case).

The conditions of this test are that the manual lever position of the automatic transmission 5 is in the neutral (N) range, and the output shaft 6 is locked by the disc brake 25 so that the output shaft becomes zero rotation. In this calculation, the condition is set such that the motor rotation is increased to 600 to 2000 rpm in this state, and the torque value of the output shaft 6 is checked under the above conditions.

Next, the shift point check test will be described with reference to FIG.

FIG. 7 exemplifies the structure of the unit for this test. 1 is a motor, 2 is a main shaft, 3 is an input shaft torque meter, 4 is a rotary shaft, 5 is an automatic transmission, 6 is an output shaft, 23 Is an output shaft torque meter, and 24 is a rotating shaft.

The unit shown in FIG. 7 is constructed by mounting a speed reducer 26 equipped with an electromagnetic brake on the rotary shaft 24 having the above-mentioned configuration.

The conditions of this test are that the manual lever position of the automatic transmission 5 is set to the drive (D) or low (L) range, and the rotation of the motor 1 is raised and lowered from, for example, 600 rpm to 5000 rpm. At the same time, the reducer 26 applies a specified load torque to the output shaft. This test measures and confirms the shift position, the transmission ratio, etc. of the automatic transmission 5 under the above-mentioned conditions.

Conventionally, the above-mentioned four tests use the test apparatus illustrated in FIG. 8 in order to be able to continuously perform these tests.

The test apparatus of FIG. 8 is configured by combining dedicated units for each test in series so that the elements of each apparatus do not overlap.

The test apparatus has a basic structure in which an input shaft torque meter 3 is connected to a main shaft 2 of a motor 1 and an automatic transmission 5 is connected to a rotary shaft 4 of the input shaft torque meter 3.

In this test apparatus, an output shaft torque meter 23 is connected to the output shaft 6 of the automatic transmission 5, a disc brake 25 is connected to the rotary shaft 24, and a speed reducer 26 is connected to the rotary shaft 27.

Along with this, the test device, on the rotary shaft 28 of the speed reducer 26,
The parking operation confirmation device 7 is connected via a clutch 29.

The test apparatus selectively uses the disc brake 25 to perform a stall torque measurement test and a drag torque measurement test, and also selectively uses the speed reducer 26 to perform a shift point check test. Further, the present test device is to connect the clutch 29 and selectively use the parking operation confirmation device to perform the parking operation test.

D. Problems to be Solved by the Invention In the conventional automatic transmission test apparatus as described above, four tests are performed, and thus a disk brake, a reducer, or a parking operation confirmation device is required for each test. Therefore, since this test apparatus selectively uses each test apparatus, the operability is poor and the cost is high. Moreover, in order to perform each of these tests continuously, each apparatus and device must be provided on one axis. However, there is a problem that the installation place must be wide.

The present invention has been made in view of the above points, and an object thereof is to provide an automatic transmission test apparatus that can be downsized so as not to take up a large installation space, has good operability, and is economical.

E. Means for Solving the Problem The automatic transmission test device of the present invention comprises a dynamometer connected to the output shaft of the automatic transmission, and a brake for preventing relative rotation between the output shaft and the oscillator. A torque arm provided on the rocker and a parking operation confirmation device attached to the torque arm are provided.

F. Operation With the above-mentioned configuration, the test device can continuously perform various tests of the automatic transmission by selectively using the functions of the dynamometer, the brake, or the parking operation confirmation device. .

G. Embodiment An embodiment of the automatic transmission test apparatus of the present invention will be described below with reference to FIGS.

In addition, in FIG. 1 to FIG.
Portions corresponding to the conventional example illustrated in FIGS. 8 to 8 are designated by the same reference numerals, and detailed description thereof will be omitted.

In the schematic explanatory view of FIG. 1, 1 is a motor, 2 is a main shaft, 3 is an input shaft torque meter, 4 is a rotary shaft, and 5 is an automatic transmission.

A dynamometer 30 is connected to the output shaft 6 of the automatic transmission 5.

As shown in FIGS. 1 to 3, the dynamometer 30 has a disc brake 31 and a parking operation confirmation device 7.
Attach.

The disc brake 31 is attached to the rotating shaft of the dynamometer 30. The caliper support 32 for the disc brake 31 is attached to the oscillator 33 of the dynamometer 30 in an overhanging state so that the caliper support 32 and the oscillator 33 integrally swing.

Torque arms 34, 35 are provided on the oscillator 33 so that the calibration weights can be suspended.

The parking operation confirmation device 7 has a constant torque arm 34.
Attach to.

In the parking operation confirmation device 7, the root end of the 3-position hydraulic cylinder 8 is attached to the base 35.

The rod 37 of the 3-position hydraulic cylinder 8 is attached to the torque arm 34 so that it can swing in the direction of arrow A by about ± 14 degrees. 3 limit switches 3 on rod 37
Install 8,39,40 and load cell 41.

It should be noted that in the above-described configuration, the stroke (± 14 °) of the hydraulic cylinder 8 becomes large. Therefore, the liquid supply hose 42
Is made longer to prevent the swing resistance of the dynamometer from increasing.

Next, various test methods for the apparatus of this example configured as described above,
And its operation will be described.

First, in the parking omission test, the shift position of the automatic transmission 5 is set to the parking (P) range. Further, the output shaft 6 is locked by the disc brake 31 of the dynamometer and braked so that the rotation becomes zero.

Under the above conditions, this test is performed by driving the 3-position hydraulic cylinder 8 and alternately applying a specified value of forward and reverse torque to the output shaft 6 via the oscillating element 33 that interlocks with the torque arm 34.

When the automatic transmission 5 is normal, the hydraulic cylinder 8 stops its rod 37 during the ascending (positive torque) or descending (reverse torque) operation, and the reaction force is applied to the load cell 41, and the output meter of the load cell 41. Indicates the specified torque value. As a result, it can be confirmed that the automatic transmission 5 operates normally and that the test apparatus operates normally.

When the automatic transmission 5 is abnormal, when the hydraulic cylinder 8 raises or lowers its rod 37, the hydraulic cylinder 8 operates without stopping midway,
Alternatively, the limit switches 38, 40 on the descending side are operated. Thereby, the abnormality can be detected. Also, the test equipment
Since the output value of the load cell 41 does not reach the specified value, it can be determined as defective.

Next, when performing a stall torque measurement test or a drag torque measurement test, operate the disc brake 31 of the dynamometer 30 to lock the output shaft 6, and measure the torque of the output shaft with the dynamometer 30. By.

Next, the shift point check test is performed by applying a specified load torque to the output shaft 6 with the dynamometer 30.

With the dynamometer 30, the load measurement accuracy can be as high as 0.5% FS. Therefore, the device of the present example enables high-accuracy measurement, while the load setting accuracy of the conventional speed reducer is as low as 2-3% FS.

H. Effect of the Invention As described in detail above, according to the automatic transmission test apparatus of the present invention, a brake is installed between the rotary shaft of the dynamometer and the oscillator, and the parking operation confirmation is performed on the torque arm of the dynamometer. Put on the device 1
Since the dynamometer can be used as the output shaft torque meter of the conventional device and the speed reducer for the load because it is configured as a single unit, and the clutch mechanism is not required, the device of the present invention can be compared with the conventional test device. It can be downsized by about 30%,
Moreover, there is an effect that the measurement accuracy can be improved.

Since the dynamometer is mainly integrated in the device of the present invention, the operability can be improved and the device can be economically manufactured.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of the automatic transmission test apparatus of the present invention, FIG. 2 is a front view of a dynamometer portion thereof, FIG. 3 is a side view thereof, and FIG.
FIG. 5 is a schematic explanatory view illustrating a conventional automatic transmission test unit, FIG. 5 is an explanatory view of a parking operation confirmation device thereof, FIGS. 6 and 7 are schematic explanatory views illustrating a test unit, and FIG. FIG. 7 is a schematic explanatory view illustrating a conventional test apparatus capable of continuously performing various tests by one unit. 1 ... Motor, 3 ... Input shaft torque meter, 5 ... Automatic transmission, 6 ... Output shaft, 7 ...
Parking operation confirmation device, 8 …… hydraulic cylinder, 30 ……
Dynamometer, 31 ... Brake, 33 ... Rotator, 34 ...
… Torque arm, 37… Rod, 38, 39, 40… Limit switch, 41… Load cell.

Claims (1)

(57) [Scope of utility model registration request] 1. A dynamometer connected to an output shaft of an automatic transmission includes a brake capable of stopping relative rotation between the output shaft and the oscillator, and a torque arm provided on the oscillator. A testing device for an automatic transmission, comprising: a parking operation confirmation device mounted on the torque arm.