JP4017357B2 - Method of assembling a bearing having an inner diameter tapered portion - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for assembling a bearing having an inner diameter tapered portion to an outer diameter tapered portion of a spindle.
[0002]
[Prior art]
Conventionally, for example, when the cylindrical roller bearing 52 is assembled to the outer diameter tapered portion 51t of the spindle 51 as shown in FIG. 4 (d), the cylindrical roller bearing 52 is replaced with the bearing outer 53, the cylindrical roller 54 as a bearing, and the bearing. In the case where the inner part 55 is constituted, the spacer 56 is assembled so that the spindle 51 can be smoothly rotated. Therefore, when the bearing inner 55 is driven into the outer diameter tapered part 51t by adjusting the thickness of the spacer 56, the spacer 56 Therefore, it is necessary to assemble so that there is no backlash in the rotation and the rotation is not too heavy.
[0003]
For this reason, conventionally, in order to appropriately determine the thickness of the spacer 56, the following procedure is used.
That is, as shown in FIG. 4A, the bearing outer 53 is press-fitted into the housing 57, the inner diameter of the bearing outer 53 is measured with the inner diameter measuring gauge G, and the measured value is retained as shown in FIG. 4B. Set to the radial clearance precision measurement gauge Z.
Next, as shown in FIG. 4 (c), the bearing inner 55 and the cylindrical roller 54 are fitted to the outer diameter taper portion 51t, and the residual radial clearance precision measurement gauge Z is covered on the outer side, and the spacer mounting portion is covered with the block gauge. B is set, and the bearing inner 55 is driven by the driving jig T. When the rotational weight of the spindle 51 becomes appropriate, the clearance at that time is measured by the block gauge B.
Then, the bearing inner 55 and the cylindrical roller 54 are once removed, and the spacer 56 is subjected to a flat polishing process based on the value measured by the block gauge B. Thereafter, as shown in FIG. The bearing inner 55 is driven by a driving jig T and is assembled.
[0004]
[Problems to be solved by the invention]
However, the conventional method has a problem that the adjustment of the spindle rotation weight and backlash at the time of assembly relies on the intuition and knack of the operator, and the assembly work is difficult for beginners and the like.
Also, the residual radial clearance precision measurement gauge Z for accurate assembly is convenient for accurate assembly in a short time, but it is a dedicated product corresponding to each spindle diameter, and the unit price per unit In addition, in order to measure with high accuracy, a certain degree of skill is required, and there are various problems such as careful handling not to give an impact during handling.
[0005]
Accordingly, an object of the present invention is to enable easy and accurate assembly even for beginners with little experience without using an expensive residual radial clearance precision measurement gauge.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is a method for assembling a bearing outer, a bearing comprising a bearing and a bearing inner to an outer diameter taper portion of a spindle, the step of measuring the inner diameter of the bearing outer, After inserting into the housing and measuring the inner diameter, a step of obtaining a difference from the inner diameter measurement value, and for calculating the thickness of the spacer that regulates the driving amount when driving the bearing inner into the outer diameter taper portion of the spindle The step of obtaining the added value by calculation based on the difference, and the assembly of the bearing outer, the bearing and the bearing inner with respect to the outer diameter tapered portion of the spindle is bitten by its own weight, and the spacer mounting gap at this time A step of measuring the gap, and adding the added value and the gap measurement value for calculating the spacer thickness. Determine the spacer thickness based on the value, and so as to set this using a spacer of this thickness.
[0007]
In this way, by eliminating parts that rely on experience and tips in each process, even beginners with little experience can easily assemble with high accuracy, and without using expensive residual radial clearance precision measurement gauges But it can be assembled.
In addition, it is an empirical rule to determine the spacer thickness based on the value obtained by adding the added value based on the amount of friction of the bearing outer and the gap value when the assembled body is bitten by its own weight. Empirical values and the like are used as coefficients and the like that are the basis of calculation when obtaining an added value by calculation from the amount of charge.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the accompanying drawings.
Here, FIG. 1 is a process diagram of a bearing assembling method according to the present invention, FIG. 2 is an explanatory view thereof, and FIG. 3 is a state diagram of assembling of the bearing.
[0009]
The method of assembling the bearing according to the present invention is easy even for a person with little experience, for example, without using an expensive jig or the like when assembling a cylindrical roller bearing having an inner diameter tapered portion to the outer diameter tapered portion of the spindle. First, the assembly state of such a cylindrical roller bearing will be described before the assembly method is described.
[0010]
That is, as shown in FIG. 3, the outer diameter taper portion 1 t of the spindle 1 is rotatably supported with respect to the housing 3 by the cylindrical roller bearing 2, and the bearing outer 4 of the cylindrical roller bearing 2 is placed in the housing 3. The bearing inner 6 is inserted in close contact with the outer diameter tapered portion 1t of the spindle 1 in close contact, and a cylindrical roller 5 serving as a bearing is interposed between the bearing outer 4 and the bearing inner 6. It is disguised.
An inner diameter taper portion 6t that can be fitted to the outer diameter taper portion 1t is formed on the inner surface of the bearing inner 6, and the press-fitting amount of the bearing inner 6 is appropriately regulated by the spacer 7.
Incidentally, another bearing is disposed between the shaft portion of the spindle 1 and the housing 3.
[0011]
Next, a method for assembling the cylindrical roller bearing 2 according to the present invention will be described with reference to FIGS.
First, as shown in FIG. 2A, the inner diameter of the bearing outer 4 is measured by the inner diameter measuring gauge G.
Next, as shown in FIG. 2 (b), the bearing outer 4 is inserted into the housing 3, the inner diameter is measured again by the inner diameter measurement gauge G, and the difference from the previous inner diameter measurement value is obtained. Ask.
[0012]
Next, as shown in FIG. 1, a certain coefficient (for example, 5 μ) is subtracted from the squeeze allowance, and the obtained value is divided by a constant (for example, 0.8) corresponding to the degree of taper. Multiply a certain coefficient (for example, 10) and use this value as the added value.
The coefficients used for these calculations are empirical values.
[0013]
On the other hand, the assembly in which the bearing inner 6, the cylindrical roller 5, and the bearing outer 4 are assembled is inserted into the shaft portion of the spindle 1, and as shown in FIG. The portion 1t is bitten by its own weight, and the gap c of the spacer mounting space h at this time is measured.
[0014]
Then, the measured value of the gap c and the added value are added, and the spacer 7 is flat polished within a certain tolerance range (for example, +0, −0.005).
[0015]
When the flat polishing of the spacer 7 as described above is completed, the main assembly of the cylindrical roller bearing 2 is started. First, the bearing outer 4 is assembled into the housing 3, and then the flat polished spacer 7 is used as the spacer mounting space portion. Assembling is completed when the bearing inner 6 is set on the bearing outer 4 and the bearing inner 6 is driven by a driving jig.
[0016]
And the cylindrical roller bearing 2 assembled | attached in such a way can obtain appropriate rotational weight.
Further, an expensive residual radial gap precision measurement gauge as in the prior art becomes unnecessary, and the cost can be reduced.
[0017]
The present invention is not limited to the above embodiment. What has substantially the same configuration as the matters described in the claims of the present invention and exhibits the same operational effects belongs to the technical scope of the present invention.
For example, the coefficient for calculating the added value is an example.
[0018]
【The invention's effect】
As described above, the method of assembling the bearing according to the present invention is a conventional method in which a highly skilled worker relies on intuition and knacks and uses an expensive strain gauge without using a gauge. Since anyone can easily assemble with high accuracy, the quality of the assembly can be made better and more uniform, and the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a process diagram of a bearing assembling method according to the present invention. FIG. 2 is an explanatory diagram of an assembling method. FIG. 3 is a diagram showing a state of assembling a bearing. Explanation of]
DESCRIPTION OF SYMBOLS 1 ... Spindle, 1t ... Outer diameter taper part, 2 ... Cylindrical roller bearing, 3 ... Housing, 4 ... Bearing outer, 5 ... Cylindrical roller, 6 ... Bearing inner, 6t ... Inner diameter taper part, 7 ... Spacer, h ... Spacer attachment Space part, c: gap.

Claims (1)

A method of assembling a bearing outer, a bearing comprising a bearing and a bearing inner to a spindle outer diameter taper portion, measuring the inner diameter of the bearing outer, and measuring the inner diameter by inserting the bearing outer into the housing The step of obtaining a difference from the inner diameter measurement value and the addition value for calculating the thickness of the spacer for regulating the driving amount when the bearing inner is driven into the outer diameter taper portion of the spindle are obtained by calculation based on the difference. And a step of making the assembly of the bearing outer, the bearing and the bearing inner bite by its own weight with respect to the outer diameter tapered portion of the spindle, and measuring the gap of the spacer mounting gap at this time, and the thickness of the spacer The spacer thickness is determined based on the sum of the added value for calculation and the measured gap value. Assembling method of a bearing having an inner diameter tapered portion, characterized in that the set using the spacer of this thickness.

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