JPH11132245A - Fixing method of half-split sleeve for bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an excessive local load generated in a fixing part, and to slide a shaft or a bearing in the shaft direction by fitting a cylinder smaller than a sleeve outside diameter in an end part of a half-split sleeve worked in a step shape. SOLUTION: A sleeve 2 is arranged in a stepped part 1a of a shaft 1 on the shaft side of a bearing 5 for the purpose of protecting the shaft 1, and is split into two halves so as to be easily mounted on and demounted from the shaft 1. Stepped work is performed over the whole periphery on end parts 2a and 2b of the sleeve 2, and the whole periphery-integrated cylinder 4 is fitted in a stepped part 3, and the sleeve 2 is fixed to the shaft 1. An outside diameter (a) of this cylinder 4 is set almost equal to or smaller than an outside diameter (b) of the sleeve 2 and smaller than an inside diameter (c) of the bearing 5. Therefore, since a projecting material having a diameter larger than an inside diameter of the bearing 5 does not exist on the shaft side, the shaft 1 can freely move in the shaft direction, and since a set bolt 7 is arranged in the integrated cylinder 4, even if a load by thermal deformation is applied, the possibility of damaging the bolt 7 is extremely reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of fixing a half sleeve which can be effectively used for a bearing device of a rotating machine such as a stirrer or a conduction machine which requires a half of a bearing for replacement of a bearing sleeve. It is about.

[0002]

2. Description of the Related Art To fix a half-split sleeve to a shaft, a flange shown in FIG. 3 is provided on both of the half-split sleeves and the flange is fixed to the shaft by bolts, or a sleeve shown in FIG. And the shaft was directly tied with a set bolt and fixed.

[0003]

In the method of providing a flange, the flange contacts the bearing when the shaft or the bearing slides in the axial direction because the flange projects outside the outer periphery of the sleeve. When the sleeve is directly fixed to the shaft with a bolt, an excessive load is applied to the bolt due to thermal deformation of the sleeve or the shaft, and a trouble that the bolt is damaged easily occurs. To solve these problems,
There has been a demand for a method of fixing a half sleeve which does not generate an excessive local load on a part to be fixed and which does not protrude from the outer periphery of the sleeve.

[0004]

Means for Solving the Problems An end of a half sleeve is machined into a step shape, and an integral cylinder whose outer shape is smaller than the outer shape of the sleeve is fitted into this portion. Thereby, the half sleeve can be firmly fixed to the shaft.

[0005]

FIG. 1 is a longitudinal sectional view of one embodiment of the present invention. On the shaft side of the bearing 5, a sleeve 2 is provided on the stepped portion 1 a of the shaft 1 for the purpose of protecting the shaft 1. The sleeve 2 has divided portions 6a, 6a so that the sleeve 2 can be easily attached to and detached from the shaft 1.
It is halved by b. The end 2a of the sleeve 2
The entire circumference of the step 2b is stepped, and a cylinder 4 integral with the entire circumference is fitted in the stepped portion 3, whereby the sleeve 2 is fixed to the shaft 1. The outer diameter a of the cylinder 4 is substantially equal to or smaller than the outer diameter b of the sleeve 2 and smaller than the inner diameter c of the bearing 5. As described above, since there is no protrusion having a diameter larger than the inner diameter of the bearing 5 on the shaft side, the shaft can freely move in the axial direction. Further, since the set bolt 7 is provided on the cylinder 4 for the purpose of preventing the cylinder 4 from falling off, there is no fear of the cylinder 4 falling off.

[0006]

The shaft can be freely moved in the axial direction because there is no protrusion having a diameter larger than the inner diameter of the bearing on the shaft side. In addition, since the half sleeve can be held and fixed on the shaft with a strong cylinder, the strength of the component parts is higher than in the conventional structure, and the possibility of damage to the parts even when a load due to thermal deformation or the like is applied is very low. .

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a longitudinal sectional view of a flange structure showing a conventional technique.

FIG. 4 is a longitudinal sectional view of a set bolt fixing structure showing a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Shaft, 1a ... Shaft stepped part, 2 ... Half sleeve, 2a,
2b: sleeve end, 3: stepped portion, 4: cylinder, 5: bearing, 6a, 6b: sleeve dividing surface, 7: set bolt,
a: cylindrical outer diameter, b: sleeve outer diameter, c: bearing inner diameter.

Claims (1)

[Claims] 1. A half-sleeve sleeve is machined at one end or both ends into a stepped shape, and an integral cylinder whose outer shape is smaller than the outer shape of the sleeve is fitted into the stepped portion so that sliding in the axial direction can be freely performed. A method of fixing a half sleeve that can firmly fix the sleeve to the shaft.