JPH026342Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is a power circulation gear testing device used for durability tests of automobile gear transmissions, etc., especially when the input shaft and output shaft are not on the same axis. This invention relates to a testing device for a transmission for a front engine front drive vehicle.

(Prior art) In order to check the fatigue strength of the gears and shafts that make up an automobile gear transmission, it is necessary to perform a test run for a predetermined period of time with torque acting on the transmission. Actual vehicle durability tests in which a transmission is mounted on a car and running on a bench, as well as bench durability tests using an engine, are conducted (for example, in the 1980s,
63545), and as a simple alternative to these, a test using a power circulation gear testing device may be conducted.

For example, as shown in FIG. 1, this testing device has first and second transmission mechanisms 1 and 2 of the same configuration, each consisting of a pair of gears 1a, 1b and 2a, 2b meshed with each other, arranged symmetrically. , one of the gears 1a and 2a located correspondingly on the same axis XX in both transmission mechanisms 1 and 2 is connected via a torsion bar 3, and
The other gears 1b, 2b located correspondingly on the axis Y-Y parallel to -X are provided with power take-off shafts 4, 5, respectively, and a transmission 8 is provided near the ends of both power take-off shafts 4, 5. , 9 (not shown) can be connected to both shafts 4, 5, respectively, with transmission mounting plates 6, 7 provided therein. Two transmissions 8 and 9 are mounted on both mounting plates 6 and 7, respectively, with their output sides facing each other, and output shafts 8a and 9a of both transmissions 8 and 9 are aligned in a straight line using a propeller shaft 10. connected to
Further, the input shafts of both transmissions 8 and 9 are connected to the power output shafts 4 and 5, respectively, thereby forming a square-shaped power circulation system. Further, a torque loader 11 is interposed between the gears 1a and 2a of the first and second transmission mechanisms 1 and 2, which applies a twist to the torsion bar 3 to apply torque to the entire system. A motor 12 is provided which rotates the gear 1a of the first transmission mechanism 1 in the illustrated example to drive the entire system, and a torque pickup 13, a rotary pickup 14, etc. are also provided as required.

According to such a configuration, when the motor 12 is operated, one of the transmissions 8 is rotationally driven with the required torque applied, and the gears and shafts of the transmission are rotated as when mounted on a car. It will operate under similar conditions, and the strength or durability of the gear will be confirmed. In this case, the other transmission 9 is used as a jig to match the rotation of the entire system, and this transmission 9 and the transmission 8 serving as the test item are made so that the gears are always the same. is set.

However, the transmissions 8 and 9 shown in FIG. 1 are for front engine rear drive vehicles (hereinafter referred to as FR vehicles), and the input shaft and output shaft are arranged on the same axis. As shown in FIG.
However, in the case of a transmission for a front engine front drive vehicle (hereinafter referred to as FF vehicle) where the input shaft and output shaft are not on the same axis, two A problem arises as to how to arrange the transmission between the power take-off shafts 4 and 5 on the axis Y-Y.

In other words, as shown in FIG.
When the input shafts (not shown) of FF vehicle transmissions 8' and 9' are connected to the ends of the
The output shafts 8a', 9a' of both transmissions 8', 9' are eccentric by a dimension twice the eccentricity L between the input and output shafts of each transmission. Therefore, both output shafts 8a', 9
The propeller shaft 10' that connects a' has a large bending angle at two universal joints 10a' and 10a'.

However, since the torque on the output side of the transmission is amplified by a factor corresponding to the gear ratio of the transmission, a large torque acts on the propeller shaft 10'. ′、
If a large torque is applied when the bending angle at 10a' is large, the shaft 10' will experience severe fatigue due to torque fluctuations and rotational fluctuations occurring at the joint, and its durability will drop significantly.

In addition, mass-produced propeller shafts manufactured as automobile parts cannot be used as propeller shafts that have large bending angles at the joints and are subject to high torque as described above. The propeller shaft must be prepared as a custom-made product, resulting in high costs and other problems.

(Purpose of the invention) This invention uses a power circulation gear testing device.
This is to deal with the above-mentioned problems when testing transmissions for front-wheel drive vehicles.By making it possible to connect the output shafts of two transmissions in a straight line, it is possible to The purpose of the present invention is to improve the durability of a propeller shaft that connects the two, and to enable the use of propeller shafts that are mass-produced as small and lightweight automobile parts.

(Structure of the invention) In other words, the power circulation gear testing device according to the invention has a pair of transmission mechanisms connected to both ends of a torsion bar arranged symmetrically, and a power circulation mechanism located on the same axis of both transmission mechanisms. A torque loader that forms a power circulation system by connecting the input shafts of two transmissions each having an output shaft connected to the output shaft, and applies torque to the system; and an external power source that drives the system. In a configuration with Each transmission is angled with respect to the power installation shaft so that the output shafts of the transmissions face each other on the same axis, and the input shafts of both transmissions are connected diagonally to each of the power output shafts. It is characterized by having a mounting part that can be attached with a .

Therefore, if two transmissions whose input shafts and output shafts do not lie on the same axis are respectively attached to the mounting portions of the above-mentioned mounting base, the output shafts of both transmissions can be placed oppositely on the same axis. Therefore, there is no need to provide a bent angle in the propeller shaft on the output side of the transmission where large torque acts, the durability of the shaft is improved, and it is possible to use a small and lightweight shaft. In that case, the power output shaft of the transmission mechanism and the input shaft of the transmission are arranged obliquely, so it is necessary to provide a bending angle in the connecting shaft that connects them. Since the torque is small and the transmission itself is inclined with respect to the power output shaft, the bending angle of the connecting shaft may be small, so the connecting shaft on the input side of the transmission should not be made particularly strong or large. There is no need to do so.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

As shown in FIG. 3, the power circulation gear testing device 20 in this embodiment is basically as shown in FIG. 1.
The structure is similar to the test equipment for transmissions for FR vehicles.

That is, a pair of gears 21a, 21b and 22a,
22b, the first and second transmission mechanisms 2 are meshed with each other.
1 and 22 are arranged symmetrically,
One gear 21a, 22a located correspondingly on the same axis XX in both transmission mechanisms 21, 22 is connected via a torsion bar 23 and a torque loader 31, and the above-mentioned axis X in both transmission mechanisms 21, 22 is connected. Power take-off shafts 24 and 25 provided on the other corresponding gears 21b and 22b are arranged on the axis YY parallel to -X. Power is input to the gear 21a in the first transmission mechanism 21 from a motor 32 as an external power source via a belt 32a, and a power output shaft 24 on the first transmission mechanism 21 side is provided with power. The gear 22a of the second transmission mechanism 22 is provided with a torque pickup 33, and the gear 22a of the second transmission mechanism 22 is provided with a rotation pickup 34, respectively. Here, the torque loader 31 is constituted by a pair of flange couplings 31a, 31a that connect one end of the torsion bar 23 and the end of the central shaft 21a' of the gear 21a in the first transmission mechanism 21. , both coupling rings 31a,
31a with a plurality of bolts and nuts 31b...31b, by connecting the torsion bar 23 and shaft 21a' with the torsion bar 23 and shaft 21a' twisted in opposite directions.
A required torque is applied to the torsion bar 23 or the entire circulation system.

On the other hand, the ends of the power take-off shafts 24, 25 in the first and second transmission mechanisms 21, 22 are connected to relay plates 26, which correspond to the mounting plates 6, 7 of the FR vehicle transmissions 8, 9 shown in FIG. , 27, and
A pair of mounting stands 35, 36 for mounting the transmissions 28, 29 according to this embodiment, respectively, are provided between the relay plates 26, 27. Output shafts 28a, 29a of both transmissions 28, 29 face each other on the same axis Z-Z, and input shafts 28b, 2 of both transmissions 28, 29 face each other on the mounting bases 35, 36.
The transmissions 28, 29 are connected such that the transmission shafts 9b are obliquely connected to the power take-off shafts 24, 25, respectively.
Dedicated mounting plates 35a and 36a are provided for mounting the shafts so that the axis Z-Z intersects obliquely at an angle .theta. with respect to the axis Y-Y connecting the power take-off shafts 24 and 25. The input shaft 2 in the transmissions 28 and 29
8b, 29b and the power take-off shafts 24, 25,
Universal joints 37a, 37a and 38 are provided at two locations, respectively.
They are connected using connecting shafts 37 and 38 having a and 38a.

In addition, the output shafts 28a, 29a of the transmissions 28, 29
Since both output shafts 28a, 29a are located on the same axis Z-Z, a shaft without a universal joint can be used as the connecting shaft 30 between the transmissions 28, 2.
A propeller shaft having universal joints 30a, 30a at two locations is used for the purpose of absorbing the installation error of 9.

Next, the operation of this embodiment will be explained. First, the dedicated mounting plate 35 on the mounting bases 35 and 36
After attaching the transmissions 28 and 29 to a and 36, respectively, the output shafts 28a and 29a of both transmissions 28 and 29
to the connecting shaft 30 via the universal joint parts 30a, 30a.
and input shafts 28b, 29b.
The universal joint parts 37a, 37a and 38a, 38a
Both power take-off shafts 24,
25 respectively. Next, the torque loader 31
If the motor 32 is operated with torque applied to the entire power circulation system by
The rotation of No. 2 is input to one of the transmissions 28, which is a specimen, through the first transmission mechanism 21, the power take-off shaft 24, and the connection shaft 37, so that the transmission 28 is in a state where a predetermined torque is applied. It will be rotationally driven, and the strength of the gears and shafts that make up the transmission 28 will be checked. Further, the output rotation of the transmission 28 is inputted from the output side to the other transmission 29, which is used as a jig, via a connecting shaft (propeller shaft) 30, and further connected to the connecting shaft 38 and the second transmission mechanism 22.
Then, the power is returned to the first transmission mechanism 21 via the torsion bar 23, and the transmission 28 is tested while the power is being circulated in this manner.

In that case, the first and second transmission mechanisms 21 and 22 have the same configuration, that is, the numbers of teeth of the corresponding gears 21a and 22a and 21b and 22b are the same, and the transmissions 28 and 29 have the same gear position. Since they are set equally, the power circulation system rotates easily. Furthermore, since the system is arranged symmetrically, if the direction of the torque applied by the torque loader 31 and the direction of rotation by the motor 32 are reversed, the transmission 28 can be used as a jig to control the transmission 29.
A similar test can be performed for

However, the transmissions 28 and 29 are connected to the input shaft 28.
b, 29b and output shafts 28a, 29a are not on the same axis, but both output shafts 28
Since a and 29a are arranged in a straight line, there is no bending angle in the universal joint portions 30a and 30a of the propeller shaft 30 that connects both output shafts 28a and 29a, and therefore the transmission 28 Despite the large amplified torque acting on the propeller shaft 30, it is possible to use a propeller shaft that is mass-produced as a small and lightweight automobile part.

On the other hand, regarding the input side of the transmissions 28 and 29,
Input shafts 28b, 29b and first and second transmission mechanisms 2
An intersection angle θ between the power take-off shafts 24 and 25 of 1 and 22
occurs, and as a result, the connection shafts 37, 38 on the input side
Bent angles occur in the universal joint portions 37a, 37a, 38a, and 38a, respectively. However, the transmission 28,2
Since a large torque does not act on the input side of the propeller shaft 9 and the input shafts 28b and 29b themselves are inclined, eccentric parallel shafts 8a' and 9a' are formed as shown in the propeller shaft 10' shown in FIG. The bending angle that occurs at the universal joint is smaller than when connecting the two, and therefore there is no need to use particularly strong large shafts as the connecting shafts 37 and 38. For example, axle shafts mass-produced as automobile parts can be used.

Here, so-called constant velocity joints are used as the respective universal joints 37a, 38a of the connecting shafts 37, 38, so that rotation without rotational fluctuation is inputted to the transmissions 28, 29.

Incidentally, as shown in FIG. 4, it is also possible to use shafts each having one universal joint portion 37a', 38a' as the connecting shafts 37', 38'.

(Effects of the invention) As described above, according to the invention, in a power circulation gear testing device used for durability tests of transmissions for front-wheel drive vehicles, a connecting shaft connecting the output shafts of two transmissions, Also, the durability of the connecting shaft that connects the input shafts of both transmissions and the power take-off shaft in the test device is improved. In addition, it has become possible to use small shafts as these connecting shafts, making it possible to use, for example, propeller shafts and axle shafts that are mass-produced as automobile parts, which in turn reduces the cost required to configure the device. will be done.

The basic configuration of the test device of this invention is as follows:
The configuration is the same as that of the test equipment for FR vehicle transmissions, so by simply changing some configurations such as the connecting shaft and transmission mounting plate, it can be used for both FF and FR vehicle transmissions. Can be used.

[Brief explanation of the drawing]

Figure 1 is a schematic plan view showing a testing device for a transmission for FR vehicles, Figure 2 is a schematic plan view of the main parts showing problems with transmissions for FF vehicles, and Figure 3 is a diagram related to the present invention.
FIG. 4 is a schematic plan view showing an embodiment of a testing device for a transmission for a front-wheel drive vehicle. FIG. 4 is a schematic plan view of a main part showing another embodiment. 20... Test device, 21, 22... Transmission mechanism,
23... Torsion bar, 24, 25... Power take-off shaft, 28, 29... Transmission, 28a, 29a...
...Output shaft, 28b, 29b...Input shaft, 30,3
7, 38, 37', 38'...Connection shaft, 35, 36
...Mounting base, 35a, 36a...Mounting part (dedicated mounting plate).

Claims (1)

[Scope of utility model registration request] A pair of transmission mechanisms connected to both ends of the torsion bar are arranged symmetrically, and the input shafts of the two transmissions are connected to each other, with the output shafts connected to the power take-off shafts located on the same axis of both transmission mechanisms. The test device is equipped with a torque loader that connects to form a power circulation system and applies torque to the system, and an external power source that drives the system, and includes an input shaft and an input shaft as the two transmissions. The target is two transmissions whose output shafts are not on the same axis, and the output shafts of both transmissions are facing each other on the same axis, and both transmissions are attached to the mounting bases on which these two transmissions are attached. A power circulation system characterized in that a mounting portion is provided for mounting each transmission at an angle to the power output shaft so that the input shaft of the machine is connected obliquely to each of the power output shafts. Type gear testing equipment.