JPH0522652Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention relates to a bearing for tape recorder flywheels, etc., which is easy to manufacture and convenient to use.

BACKGROUND ART Conventionally, bearings have been provided with a cylinder body 35 in which an oil-impregnated sintered metal cylinder 32 having a shaft insertion hole 31 was fitted into an inner hole 33, as shown in FIGS. 3 and 4. The end surface 36 of the cylindrical body 35 is formed into a flat surface, a mounting body 37 is formed from the cylindrical body 35, and one end surface 38 of the oil-impregnated sintered metal cylinder 32 protrudes from the end surface 36.
Furthermore, a rotating shaft 3 is inserted into the inner hole 33 of the oil-impregnated sintered metal cylinder 32.
9 is inserted through it, and a rotating body 40 such as a washer attached to a rotating shaft 39 is in sliding contact with one end surface 38.

Moreover, as shown in FIG. 5, a cylinder body 5 made of artificial resin
0 is inserted into an outer cylinder 51 made of metal or the like, and both ends of the outer cylinder 51 are caulked, one of which is arcuate and the other is flat. ).

Furthermore, as shown in FIG. 6, a structure in which a sintered metal cylinder 56 is fixed to the inside of a metal tube 55 using a bearing is known (see Publication No. 8842/1983).

Problems to be Solved by the Invention By the way, the device shown in FIGS.
0 is in sliding contact with the one end surface 38 and the rotating body 40.
There is a drawback that a large frictional resistance is generated between the rotating shaft 39 and uneven rotation of the rotating shaft 39. In addition, the cylinder body 50 shown in FIG. An arc-shaped bearing cannot withstand long-term use as a bearing, and the frictional resistance is large, making it impossible to rotate smoothly.Furthermore, the arc-shaped bearing only at one end has directional properties and is cumbersome to work with. Moreover, the metal tube 55 shown in FIG. 6 does not have an arcuate surface at both ends, and the metal tube 55 does not have an arcuate surface on the rotating shaft like the one shown in FIGS. 3 and 4. There were drawbacks such as uneven rotation.

This invention solves the above problems and aims to provide a bearing for a tape recorder flywheel or the like that is convenient to use.

Means for Solving the Problems In order to achieve the above object, the bearing of the tape recorder flywheel, etc. of this invention has two oil-impregnated sintered metal cylinders 2, 2 each having a shaft insertion hole 1 inside the inner hole 3. A cylindrical body 5 is provided which is fitted at a distance from the cylindrical body 5, and both end surfaces 6, 6 of the cylindrical body 5 are formed in an arc shape so as to protrude from the oil-impregnated sintered metal cylinders 2, 2, and a mounting body 7 is provided from the cylindrical body 5. The bearing alloy body 4 is formed using the following steps.

Function: This device uses the above-mentioned means to insert a rotary shaft 8 into the inner hole 3 as shown in FIG. The body 9 is brought into sliding contact and rotated.

Embodiment An embodiment of this invention will be described below with reference to the drawings. A cylindrical body 5 is provided in which two oil-impregnated sintered metal cylinders 2, 2 each having a shaft insertion hole 1 are fitted into an inner hole 3 with a distance between them. Both end surfaces 6, 6 of the cylindrical body 5 protrude from the oil-impregnated sintered metal cylinders 2, 2 and are formed in an arc shape, and a mounting body 7 is provided from the cylindrical body 5 to form the bearing alloy body 4. is the mounting hole 1 provided in the board 10.
1 through the stepped hole 12 provided in the mounting body 7, swage the swaged portion 13, and install as shown in FIG. 2.
A rotary shaft 8 is inserted into the shaft insertion holes 1, 1, and a rotary body 9 such as a washer is brought into sliding contact with one of the end surfaces 6, 6 formed in an arc shape. A pulley 16 that is rotated via a belt 15 is attached to the shaft, and a rotating shaft 8 is rotated.

Further, 17 is a tightening nut, and 18 is an outer end surface of the oil-impregnated sintered metal cylinder 2.

Effects of the invention This invention has the above-mentioned configuration, and includes a cylinder 5 in which an oil-impregnated sintered metal cylinder 2 with a shaft insertion hole 1 is fitted into an inner hole 3, and both end surfaces 6 of the cylinder 5 are provided. , 6 are formed in an arc shape, and by forming the mounting body 7 from the cylinder 5, the rotating shaft 8 can be inserted into the inner hole 3, and a rotating body 9 such as a washer can be slid on the arc surface formed in the arc shape. By rotating tangentially, the frictional resistance of the oil-impregnated sintered metal cylinder 2 is reduced, and uneven rotation of the rotating shaft 8 can be prevented as much as possible, which is extremely convenient for use.

Moreover, the oil-impregnated sintered metal cylinder 2 equipped with the shaft insertion hole 1 is 2
By fitting the pieces separately into the inner hole 3, the rotating shaft 8 is connected to the two oil-impregnated sintered metal cylinders 2, 2 within the cylinder body 5.
It rotates smoothly by reducing frictional resistance without hitting the entire surface of the shaft.

Further, both end surfaces 6, 6 of the cylinder body 5 are formed in an arc shape so as to protrude from the oil-impregnated sintered metal cylinders 2, 2, so that arcuate surfaces are formed at both ends of the cylinder body 5, and either one of the circular arc surfaces The rotating body 9 can be brought into sliding contact with the rotating body 9.

That is, by forming both end surfaces 6, 6, which are both ends of the cylindrical body 5, into an arc shape, it is possible to carry out the work without considering the mounting direction of the arc surfaces during the work, and the work can be done easily. It is easy and can be done quickly and without failure.

Furthermore, it has a simple structure, is suitable for mass production, and can be provided at low cost, and has many practical effects.

[Brief explanation of drawings]

Figure 1 is a sectional view of the main parts, Figure 2 is a partially cutaway side view showing the state of use, Figure 3 is a sectional view of the conventional product,
FIG. 4 is a partially cutaway side view showing the conventional product in use, and FIGS. 5 and 6 are explanatory diagrams of the conventional example. 1...Shaft insertion hole, 2...Oil-impregnated sintered metal cylinder, 3
... Inner hole, 4 ... Bearing alloy body, 5 ... Cylindrical body, 6 ...
... End surface, 7 ... Mounting body, 8 ... Rotating shaft, 9 ...
Rotating body, 10... Board, 11... Mounting hole, 12...
...Stepped part, 13...Crimped part, 14...Motor,
15... Belt, 16... Pulley, 17... Tightening nut, 18... Outer end surface.

Claims (1)

[Scope of utility model registration request] A cylindrical body 5 is provided in which two oil-impregnated sintered metal cylinders 2, 2 each having a shaft insertion hole 1 are fitted in an inner hole 3 at a distance, and both end surfaces 6, 6 of the cylindrical body 5 are made of oil-impregnated sintered metal cylinders 2, 2. A bearing for a tape recorder flywheel, etc., characterized in that it is formed into an arc shape protruding from metal cylinders 2, 2, and a bearing alloy body 4 is provided with a mounting body 7 from a cylinder body 5.