JPH0619860Y2 - Coupling mechanism for different diameter shafts - Google Patents

Description

Detailed Description of the Invention A. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coupling mechanism corresponding to different-diameter shafts, and is intended to reliably fit a plurality of types of shafts having different diameters.

B. Outline of the Invention The present invention is such that a slide bush is slidably fitted to a fixed bush, and the slide bush is biased toward the fixed bush to form a step on the inner peripheral surface of the fixed bush and the slide bush. The uncoupling column is inserted into, and the shaft is joined by abutting and locking the shaft at the step portion or the end surface of the uncoupling column depending on the diameter of the shaft to be fitted.

C. 2. Description of the Related Art Products such as automobile missions that do not have a drive unit while having a rotating part and that are connected to a drive unit such as an engine only after assembly is completed are connected to a drive unit such as a motor. Product testing is performed. In that case, the rotation test of a plurality of types of missions is continuously performed.

For example, to test a mission, a test apparatus arranged as shown in FIG. 5 is used. That is, as shown in the figure, the transmission efficiency of the mission 2 is measured by driving the mission 2 with the motor 1 and applying inertia with the flywheel 4 and measuring the output characteristics of the mission 2 with the torque meter 3 and the dynamometer 5. Performance test. The missions 2 are replaced one after another and the respective mission characteristics are examined.

In the mission test apparatus described above, it is necessary to match the center axes of the motor 1 and the mission 2 so as to couple them so that the rotational force is transmitted.

Here, an example of a concrete coupling structure of the motor and the mission will be described with reference to FIG. The motor and the transmission 13 are connected via a connecting device 12 having a transmission shaft 11 connected to an output shaft of a motor (not shown). A spline boss 15 is attached to a flywheel 11a attached to the transmission shaft 11 via a switching clutch plate 14, and a spline portion formed on an inner peripheral surface of the spline boss 15 has a rotary shaft of the mission 13 attached thereto. The spline shaft portions 17 formed in 16 are connected by meshing. This connection is performed as follows. That is, the drive motor is rotated at a low speed to rotate the spliner boss 15 at a low speed, and the slide base 18 on which the mission 3 is mounted is moved in the direction of the arrow. Then, the spline shaft portion 17 and the spline portion of the spline boss 15 are engaged with each other, and the slide base 18 is further moved,
The tip of the rotary shaft 16 is fitted into the pilot 19 meshed with the transmission shaft 11. As described above, the output shaft of the drive motor and the rotary shaft 6 of the mission 3 as the sample are connected. Next, the mission 13 is fixed by the clamp claws 21 attached to the rod tip of the hydraulic cylinder 20. After that, the motor is rotated at a predetermined number of revolutions and the mission 1
Three rotation tests are performed. The switching clutch plate 14
Is normally in a clutch engagement state in which it is pressed against the flywheel 11a. However, in the rotation test of the mission 13, when the transmission 13 is shifted, the clutch plate 14 is operated in a clutch disengaged state separated from the flywheel 11a. , Enable this shift.

In the structure shown in FIG. 6, a centering is performed by using a connecting structure in which the rotary shaft 16 is fitted to the pilot 19 to prevent vibration.

In the example shown in FIG. 6, the rotational force of the motor is transmitted to the transmission 13 via the switching clutch plate 14. However, the combination mechanism of the projection and the locking portion that locks the projection, and the combination of the pin and the hole. There is also a system in which the rotational force is transmitted by a mechanism.

In addition to the mission, the specimen to be subjected to the rotation test includes a single torque converter, a transmission incorporating the torque converter, a transaxle, and the like.

Regardless of the connection structure between the test piece and the drive unit (motor), or the type of the test piece, the connection is such that it fits on the rotary shaft of the test piece and is centered. Structure is required.

By the way, when the type of the specimen changes, the diameter of the rotary shaft of the specimen also changes. Therefore, in the conventional tester, the center is aligned by using the following two measures for the diameter change.

In the first conventional means, as shown in FIGS. 7 (a) and 7 (b), a stepped fitting hole 31 is formed in the drive unit 30 so that the large diameter shaft 32 and the small diameter shaft 33 can be fitted. ing. FIG. 7 (c) shows the state where the large diameter shaft 32 is fitted, and FIG. 7 (d) shows the small diameter shaft 3
3 shows a fitted state.

In the second prior art, as shown in FIGS. 8 (a) and 8 (b), a large diameter bush 34 or a small diameter bush 35 is replaceably attached to the drive unit 30 as an attachment. .

D. Problems to be Solved by the Invention By the way, the conventional technique shown in FIG. 7 cannot be adopted if there is a limit to the amount of movement of the shaft (the amount of movement in the axial direction). Further, in the conventional technique shown in FIG. 8, it takes time to replace the bush.

In view of the above-mentioned conventional technique, the present invention provides a coupling mechanism corresponding to different diameter shafts that can reliably couple the rotation shafts even if the diameters of the rotation shafts of the specimen are different.

E. Means for Solving the Problems According to the configuration of the present invention that achieves the above objects, a shaft is fitted from one end side, and a step portion that reduces the inner diameter stepwise from one end side to the other end side is provided on the inner circumference. At least one fixed bush that is fixedly installed on the surface and fits slidably and tightly into the minimum inner diameter portion of the fixed bush, and a step that reduces the inner diameter stepwise from one end side to the other end side At least one part is formed on the inner peripheral surface, and a slide bush having a locking part that abuts against the fixed bush when sliding toward one end side, and is slidably inserted into the minimum inner diameter part of the slide bush. And a resilient member that urges the slide bush from the other end side toward the one end side.

F. Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a main part of a test apparatus using the coupling mechanism of the present invention, and FIGS. 2 to 4 show the coupling mechanism extracted.

As shown in FIG. 1, the transmission shaft 100 of the coupling device is rotated by a motor. The transmission shaft 100 is provided with a connecting portion 101 having a connecting hole 101a formed therein.
In this example, the test piece is a mission in which the torque converter 200 is assembled, and the rotational force is transmitted to the torque converter 200 by inserting the drive pin 201 of the torque converter 200 into the coupling hole 101a. Transmission shaft 100
Inside the left end, the coupling mechanism 300 according to the present invention is built in. The details will be described later, but the rotation shaft 202 of the torque converter 200 is fitted by this coupling mechanism 300 and the center axis is aligned to generate vibration. To prevent.

As shown in FIGS. 1 to 4, the coupling mechanism 300 includes a fixed bush 301, a slide bush 302, a decoupling column 303, springs 304a and 304b, and a decoupling rod 305.

The fixed bush 303 is fixedly installed with its flange 301a fastened to the transmission shaft 100, and by forming the step portion 301b on the inner peripheral surface, the inner diameter (φA) on the left end side.
The inner diameter on the right end side is smaller than that of. The rotary shaft 202 is fitted into the fixed bush 300 from the left end side.

The slide bush 302 is slidably and tightly fitted to the minimum inner diameter portion (right end side inner diameter portion) of the fixed bush 301. The step portion 30 is provided on the inner peripheral surface of the slide bush 302.
2a is formed, and the inner diameter (φC) on the right end side is smaller than the inner diameter (φB) on the left end side. Also slide bush 3
02 has a locking portion 302b formed therein, and when the slide bush 302 moves leftward, the locking portion 302b abuts on the fixed bush 301 and cannot move leftward from the abutting position. The slide bush 302 is biased to the left by springs 304a and 304b.

The uncoupling column 303 includes a column portion 303a and a flange 303.
and the cylindrical portion 303a has a slide bush 3
02 is slidably inserted in the smallest inner diameter portion (right end side inner diameter portion). The flange 30 of the uncoupling column 303
A spring 304b is provided between 3b and the slide bush 302.
Intervenes. When releasing the rotating shaft 202, the decoupling rod 305 moved by the cylinder pushes the decoupling column 303 to the left.

The diameter of the rotary shaft of the mission to be tested by the testing apparatus using the coupling mechanism 300 described above is three kinds of sizes obtained by subtracting the fitting tolerance from φA, φB, and φC.

Next, a mode in which the rotating shafts 202 having different diameters are coupled will be described separately for each diameter.

When the rotating shaft 202 has a large diameter, as shown in FIG. 2, the end surface of the rotating shaft 202 and the step portion 301b come into contact with each other, and the rotating shaft 202 is fixed to the inner diameter portion (φ of the left end side of the fixed bush 301).
Fit in A). In this case, the slide bush 30
2 is pushed by the rotary shaft 202 and occupies the right side position. Further, the springs 304a and 304b are compressed.

When the rotary shaft 202 has a medium diameter, as shown in FIG. 3, the step portion 302a of the slide bush 302 and the rotary shaft 20 are biased to the left by springs 304a and 304b.
The rotary shaft 202 is fitted to the left end side inner diameter portion (φB) of the slide bush 302. The slide bush 302 is located to the left of the state shown in FIG. The position of the end surface of the rotating shaft 202 is the same as that shown in FIG.

When the rotating shaft 202 has a small diameter, as shown in FIGS. 1 and 4, the end surface of the rotating shaft 202 and the uncoupling column 30 are separated.
3 end face abuts and slide bush 302
Is urged by springs 304a and 304b to move to the left and abut the fixed bush 301. Therefore, the rotary shaft 202 fits into the inner diameter portion (φC) of the slide bush 302 on the right end side. At this time, the position of the end surface of the rotary shaft 202 is the same as that in FIG.

Thus, even if the diameters of the rotary shaft 202 are different, they can be connected with the same fitting tolerance, which is very convenient as a test device. Further, the end surface position of the rotary shaft 202 at the time of coupling may be the same position even if the diameters are different, and the amount of the rotary shaft 202 coming in and out can be made constant. Further, when the shafts of different diameters are used, the slide bush 302 is automatically slid by the spring force of the springs 304a and 304b to move the rotary shaft 202.
Since the products are automatically fitted to each other, even if products of different types flow on the inspection line, they can be joined without setup change.

When releasing the coupling, the coupling releasing rod 305 is moved to the left by a cylinder (not shown) to release the coupling releasing column 30.
Push 3 to the left to release.

The present invention can be applied not only to the test apparatus but also to an apparatus for connecting a plurality of shafts having different diameters. Further, a plurality of step portions may be formed on the inner peripheral surfaces of the fixed bush and the slide bush, respectively. If the number of step portions is increased, it is possible to connect the shafts of various kinds having different diameters.

G. Effects of the Invention According to the present invention as described in detail with the embodiments above, a plurality of types of shafts having different diameters can be automatically and surely coupled.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a main part of a test device using a coupling mechanism according to the present invention, FIGS. 2 to 4 are cross-sectional views showing the coupling mechanism, and FIG. 5 is a layout diagram showing a mission test device. FIG. 6 is a cross-sectional view showing the coupling structure of the mission test apparatus, and FIGS. 7 and 8 are cross-sectional views showing conventional means for different diameter shafts. In the drawings, 100 is a transmission shaft, 202 is a rotation shaft, 300 is a coupling mechanism, 301 is a fixed bush, 301b is a stepped portion, 302 is a slide bush, 302a is a stepped portion, 303 is an uncoupling column, 304a and 304b are springs. Is.

Claims (1)

[Scope of utility model registration request] 1. A shaft is fitted from one end side, and
A fixed bush that is fixedly installed with at least one step on the inner peripheral surface that reduces the inner diameter stepwise from the one end side to the other end, and fits slidably and tightly on the minimum inner diameter part of the fixed bush. At the same time, at least one step portion is formed on the inner peripheral surface to reduce the inner diameter stepwise from one end side toward the other end side, and when further sliding toward the one end side, it contacts the fixed bush. A slide bush having a stop portion, a decoupling column body slidably inserted into the smallest inner diameter portion of the slide bush, and an elastic member for urging the slide bush from the other end side toward the one end side. Coupling mechanism for different diameter shafts.