JPH0211618Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Purpose of the Invention" (Field of Industrial Application) The present invention relates to an inner ring fastening device for fixing the two-part inner ring of a two-part bearing to a shaft.

(Prior Art) A conventional two-piece bearing is constructed as shown in FIGS. 2 to 5. That is, two-split inner rings 2, 2 fitted into the trunnion shaft 1 of the converter, two pairs of two-split fastening rings 3, 3 surrounding the inner rings 2, 2 and displacing the split position by 90 degrees, and this two-split fastening It consists of vertical hole bolts 4, 4 that connect the rings 3, 3 together, a large number of rollers 5, . . ., and two-part outer rings 7, 7 supported by upper and lower divided bearing boxes 6, 6. has been done.

As shown in Figures 4 and 5, the bolt 4 with a vertical hole is inserted through a notch 8 provided in one of the fastening rings 3, and due to dimensional constraints, it is designed with a hexagonal vertical hole. bolts are used. This vertical hole bolt 4 has a hexagonal hole 4a in its head as shown in FIG. Attach bolt 1 to fastening ring 3 as shown in
It is fixed at 0 to prevent it from loosening due to vibrations that occur during operation of the converter.

(Problem that the invention aims to solve) Since the fastening part is usually inside the bearing box, the machine must be stopped for inspection. Moreover, the bearing box is not easy to disassemble.

Therefore, the loosening prevention means must be reliable, but the conventional prevention means have a complicated structure. For this reason, it may be fastened using a washer for preventing rotation, but the reliability is low.

"Structure of the invention" (Means for solving the problem) The present invention has a bolt hole 11 in one of the abutting parts of the two-part tightening rings 3, 3 that tighten the two-part inner rings 2, 2, and a screw hole 12 in the other. A small-diameter hole 13 communicating with this screw hole 12 is provided, and a reverse threaded portion 18 is provided at the tip of the tightening screw portion 17 that screws into the screw hole 12 of the bolt 15 with a vertical hole, through which the small-diameter hole 13 is inserted. A locking nut 21 is screwed onto the reverse threaded portion 18 on the outside of the small diameter hole 13.

(Example) An example of the present invention will be explained based on FIG.
A notch 8 is provided in one of the abutting portions of the fastening rings 3, 3, as in the conventional case, and a notch 8' is also provided in the other. One of the fastening rings 3 has a notch 8.
A bolt hole 11 communicating with the bolt hole 11 is provided horizontally, and a screw hole 1 communicating with the bolt hole 11 is provided in the other fastening ring 3.
2, and a small-diameter hole 13 that communicates this screw hole 12 with the notch 8' are provided horizontally.

Further, the fastening ring 3 provided with the notch 8' is provided with a detent hole 14 that is open on the notch 8' side.

On the other hand, the bolt 15 with a vertical hole has a hexagonal hole 16a in the head 16, a tightening screw portion 17 that screws into the screw hole 12, and the tip of the tightening screw portion 17 is inserted into the small diameter hole 13. A small-diameter reverse screw portion 18 is provided with a thread in the opposite direction to the tightening screw portion 17. Then, the tongue piece 20 of the tongue washer 19 is fitted into the locking hole 14, and the locking nut 21 is screwed into the reverse threaded portion 18.

The rest is the same as the conventional one, and illustration and description thereof will be omitted.

(Function) This embodiment is constructed as described above, and when fastening the fastening rings 3, 3, the vertical hole bolt 15 is inserted through the notch 8 into the bolt hole 11 and tightened with a hydraulic wrench or the like. , the tightening screw part 17 is inserted into the screw hole 1
2 to produce a predetermined tightening force, insert the tongue washer 19 into the reverse threaded part 18, insert the tongue piece 20 into the locking hole 14, and then insert the locking nut 21 into the reverse threaded part 18. to be screwed together.

When the vertical bolt 15 attempts to loosen, the reverse threaded portion 18 faces in the tightening direction, increasing the tightening force of the tightening threaded portion 17, making it possible to mechanically prevent loosening. .

The diameter of the reverse threaded portion 18 is formed so that the outer diameter of the locking nut 21 is equal to or less than the outer diameter of the tightening threaded portion 17. This means that the strength member that receives the tightening force is
A tightening screw portion 17 and a screw hole 12, and a reverse screw portion 1.
8 only needs to have enough strength to prevent loosening of the tightening screw part 17, and in a limited space, it is necessary to form it with a small diameter, and it can provide highly reliable loosening prevention. It is.

The locking nut 21 is a double nut disclosed in Japanese Patent Publication No. 48-25700, in which a part of a concave nut is screwed onto the bolt, and a convex nut is screwed onto the bolt and the concave nut. It may be used.

Nuts having various other locking mechanisms can also be used.

"Effects of the Invention" Since the present invention has the above-mentioned mechanism and function, the structure is simple and the reliability of locking is very high.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing only the main parts of an embodiment of an inner ring fastening device for a two-part bearing, Fig. 2 is a longitudinal sectional view of a conventional device, Fig. 3 is a front view thereof, and Fig. 4 is a main part of the device. The sectional view, FIG. 5, is an enlarged view of a portion of the vertical bolt. In the figure, 2 is a two-split inner ring, 3 is a two-split tightening ring, 11 is a bolt hole, 12 is a screw hole, 13 is a small diameter hole, 15 is a bolt with a standing hole, 17 is a tightening screw part, 18 is a reverse threaded portion, and 21 is a locking nut.

Claims (1)

[Scope of utility model registration request] A bolt hole 11 is provided in one of the abutting portions of the two-part tightening rings 3, 3 that tighten the two-part inner rings 2, 2,
A small diameter hole 13 communicating with the other screw hole 12 is provided, and a bolt 15 with a stand-in hole is provided.
A reverse threaded part 18 that passes through the small diameter hole 13 is provided at the tip of the tightening threaded part 17 that is screwed into the threaded hole 12 of the screw hole 12, and a locking nut 21 is screwed into this reverse threaded part 18 on the outside of the small diameter hole 13. An inner ring fastening device for a two-part bearing.