JPS5937718Y2 - Bearing mounting device for bearing metal friction testing equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a bearing mounting device for a bearing metal friction testing apparatus that has a self-aligning property for a rotating shaft.

Generally, in a friction test device, as shown in Fig. 1, the power of a motor 1 is decelerated to a predetermined rotational speed by Fouries 2a and 2b, and then transmitted to a drive shaft 3. It is transmitted via the chuck 4 to the rotating shaft 5 inserted into the test bearing metal a.

The test bearing metal a is press-fitted into a bearing mounting device 6, and an extension shaft I directly connected to the bearing mounting device 6 is equipped with a torque detector 8, and its tip is pivotally supported by a device tube 9. The structure is as follows.

Note that reference numerals 10a and 10b are ball bearings that support the main shaft 1a and drive shaft 3 of the motor 1, and are installed in the main body of the friction testing apparatus.

Here, since the test bearing metal a has a structure that is press-fitted into the inner diameter of the bearing mounting device 6, it can be applied to the bearing metal JL/a with a straight outer diameter, but if the outer diameter is different, Bearing mounting device 6 for each type of test bearing metal a
Not only is it uneconomical to prepare, but when testing bearings, it is extremely difficult to align the center of the bearing with the center of the shaft during assembly.
Since accurate centering of the rotating shaft 5 and the extension shaft 7 of the bearing mounting device 6 is required, the machining accuracy of the bearing meta JL/a has been a problem.

In addition, in recent years, spherical bearing metals in which the outer diameter of oil-impregnated metal is formed into a spherical shape have become popular as bearing metals for light loads, but in order to perform friction tests on these spherical bearing metals, it is necessary to
There was a problem in that a bearing mounting device 6 had to be prepared for each spherical bearing metal.

In addition, in order to use the conventional bearing mounting device 6 as is, it is necessary to cut the outer diameter of the spherical bearing metal into a straight shape. Since it is different from the above, accurate friction tests cannot be performed, and there has been no satisfactory bearing mounting device.

The present invention was made in view of the above-mentioned circumstances, and includes a flange portion that supports the outer diameter of the spherical bearing metal from one end side at one end of the housing that supports the test bearing metal having a spherical outer diameter, and a flange portion that supports the outer diameter of the spherical bearing metal from one end side.・A ring placed on the other end of the housing to support it from the other end of the outer diameter of the spherical bearing metal, and the above/・
The spherical bearing metal is fixed on both sides by an adjustment screw that is movably screwed into a threaded portion provided on the inner circumferential surface of the opening opened at the other end of the housing to push the ring toward the flange. By being configured so that it is fixed in the housing while being held between the rings, it is easy to accurately center the rotating shaft 5 and the extension shaft 7 of the bearing mounting device 6, and the inner circumferential diameter of the ring is suitable for testing purposes. If the outer diameter is greater than or equal to the minimum outer diameter of the spherical bearing metal and less than the maximum outer diameter, there is no need to prepare a bearing mounting device for each spherical bearing metal, simplifying the work process and reducing the cost of the product. washing machine,
The present invention aims to provide an economical and easy-to-handle bearing mounting device for friction testing of light-load spherical bearing metals used in juicers, mixers, electrical equipment, etc.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 2 and 3.

FIG. 2 is an explanatory diagram of the device according to this invention, and the corresponding symbols are the same as those of the conventional device.

That is, the test bearing metal A according to this invention has a spherical outer diameter and is supported by the bearing mounting device 11, and the rotating shaft 5 is inserted into the test spherical bearing metal A.

The rotating shaft 5 is connected to a drive shaft 3 driven by a motor 1 via a shaft chuck 4, and the drive shaft 3 reduces the rotation speed of the motor 10 to a predetermined rotation speed using pulleys 2a and 2b. This information has been transmitted and can be changed as appropriate according to the initial conditions of the friction test.

Further, an extension shaft γ is directly connected to the bearing mounting device 11,
A torque detector 8 is installed at a predetermined position of the extension shaft 70, and the tip thereof is pivotally supported by a device support 9.

The bearing mounting device 11 is as shown in FIG.

Oil-impregnated metals (sintered alloys) with different inner and outer diameters that are actually used are installed as they are in the housing 12 via the ring 13 as test spherical bearing metal A. Even if the shapes of the housings 12 and rings 13 are different from each other, it is possible to hold the housings 12 and the rings 13 on the opposite sides within a predetermined range.

That is, the housing 12 has a test spherical bearing metal A.
The ring 13 is formed on the inner peripheral surface of the opening B which is open to one end side of the hollow part 12a.
The inner diameter threaded portion 12b is screwed with the adjustment screw 14 that presses the
is formed.

Further, at the other end of the housing 12, a support collar 12d is formed which supports the outer diameter of the test spherical bearing metal A and has a hole 12c into which the rotating shaft 5 is inserted.

Therefore, if the inner diameter of the ring 13 and hole 12c is greater than or equal to the minimum outer diameter and less than or equal to the maximum outer diameter of the outer diameter formed on the spherical surface of the test bearing metal A, the test spherical bearing metal A can be easily assembled. The test spherical bearing metal A can be held in the rotating shaft because its spherical outer diameter is supported by the ring 13 and the inner and outer edges of the hole 12c of the support collar 12b. Since it is freely swingable in all directions with respect to the axial direction of the rotary shaft 5, even if there is a slight misalignment in the alignment between the rotary shaft and the extension shaft γ, the centering can be automatically performed by rotating the rotary shaft 5. Can be done.

Furthermore, a lubrication hole 15 is located in the hollow part 12a of the housing and communicates with the outside, and lubricates the test spherical bearing metal A as needed to facilitate the above-mentioned automatic alignment. It is possible to eliminate the extra ball force in the ball.

Furthermore, extension shafts 7 are provided at several locations on the outer periphery of the housing 12.
A fixing hole 17 is provided in the flange 7a of the flange 7a to be fastened with a fixing screw 16.

In the bearing mounting device 11 of the bearing metal friction testing device according to the present invention configured as described above, first, after removing the fixing screw 16 from the housing 12 and removing the flange 7a, the test spherical bearing is inserted from the opening B side. The metal A is accommodated in a predetermined position in the hollow portion 12a.

Next, by tightening the adjustment screw 14, the test spherical bearing metal A is pressed in the direction of the support collar 12d having the hole 12c through the song 13, and is held between the support collar 12d and the ring 13. The test spherical bearing metal A is
The housing 12 fitted with the housing 12 is fastened to the flange 7a of the extension shaft 7 with a fixing screw 16.

Thereafter, the rotary shaft 5 is inserted into the testing spherical bearing metal A supported within the housing, and is mounted on a friction testing apparatus.

At this time, even if there is a slight difference in the alignment of the rotating shaft 5 and the extension shaft 7, the test spherical bearing metal will automatically exhibit alignment by simply rotating the rotating shaft 5 as described above. ,
Any possibility of generating extra frictional forces is completely eliminated.

As described above, this invention has a simple structure, can be applied without changing the bearing mounting device even if the inner and outer diameters of the test spherical bearing metal A are different, and can be applied to the spherical bearing actually used. Since the metal can be used as it is as a bearing metal for friction tests and friction tests can be performed, there is no variation in data, and it has practical effects such as obtaining accurate design data.

[Brief explanation of drawings]

Fig. 1 shows a partially broken friction test device showing a conventional example, Fig. 2 shows a partially broken friction test device showing an example of this invention, and Fig. 3 shows the main parts of the same friction test device. FIG. 3 is a sectional view of the bearing mounting device. 1...Motor, 1a...Main shaft, 2
a + 2 b... 2 1 c 3...
Drive shaft, 4... Shaft chuck, 5...
... Rotating shaft, 6... Bearing mounting device, 7...
...Extension shaft, 7a...Flange, 8...
・Torque detector, 9...Device receiver, 10a, 10
b... Spherical bearing, 11... Bearing mounting device, 12... Housing, 12a...
Hollow part, 12b... Inner diameter threaded part, 12c...
... Hole, 12d... Support tsuba, 13...
・Ring, 14... Adjustment screw, 15...
・Oil filling hole, 16...Fixing screw, 17...
・Fixing hole, A...Test spherical bearing metal, a・
...Bearing metal for testing.

Claims (1)

[Scope of utility model registration request] A bearing mounting device for a friction test device for light-load bearing metals supports a test bearing metal with a spherical outer diameter...a flange that supports the outer diameter of the spherical bearing metal from the lower end side at one end of the housing; a ring placed on the other end of the housing in a position to support it from the other end of the spherical bearing metal; and a threaded portion provided on the inner circumferential surface of the opening open to the other end of the housing. and an adjustment screw that is movably screwed into the ring and pushed out the ring toward the flange. Bearing mounting device in friction test equipment.