JPS6327580B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides, for example, a separated inner ring double row angular ball bearing by selectively combining a double row outer ring, a single row inner ring, and balls constituting a separated inner ring double row angular ball bearing to obtain a predetermined axial clearance. This invention relates to a method of assembling an angular contact ball bearing.

FIG. 1 shows a double-row angular contact ball bearing 1 with a separated inner ring. The balls 5 are loosely inserted into and held in a holder 6. Double-row outer ring raceway grooves 7 and 8 are provided on the inner surface of the double-row outer ring 2, and inner ring raceway grooves 9 and 10 are provided on the outer surface of each single-row inner ring 3 and 4, respectively. The balls 5 are fitted between the inner ring raceway grooves 9 and 10 so as to have an axial clearance C (not shown). Each single row inner ring 3, 4 has a front face 11 of each single row inner ring 3, 4,
12 are assembled so as to face each other and abut against each other. In the symbols in the figure, A ₁ and A ₂ are the maximum outer ring raceway diameters in each outer ring raceway groove 7 and 8 of the double row outer ring,
B ₁ , B ₂ are the minimum outer ring raceway diameters in the inner ring raceway grooves 9 and 10 of each single row inner ring, D is the ball diameter of the balls 5, R ₁ ,
R ₂ is the outer ring raceway groove radius of each outer ring raceway groove 7 and 8,
r ₁ and r ₂ are the inner ring raceway groove radius of each inner ring raceway groove 9 and 10, P ₁ is the raceway groove pitch shown between the centers of outer ring raceway groove radius R ₁ and R ₂ in each outer ring raceway groove 7 and 8, P ₂ and P ₃ are the respective raceway groove position dimensions from the front faces 11 and 12 of each single-row inner ring 3 and 4 to the center of the inner ring raceway groove radius r ₁ and r ₂ , Θ ₁ , Θ ₂
is the nominal contact angle when the double-row outer ring 2 and single-row inner rings 3 and 4 are pressed against each other in the axial direction, and Q ₁ is the position between the positions of the nominal contact angles Θ ₁ and Θ ₂ on the surfaces of each outer ring raceway groove 7 and 8. The raceway groove contact point pitches Q ₂ and Q ₃ are the respective orbits from the front faces 11 and 12 of each single-row inner ring 3 and 4 to the positions of the nominal contact angles Θ ₁ and Θ ₂ of the inner ring raceway grooves 9 and 10, respectively. This is the groove contact point position dimension.

Generally, the axial clearance C of the inner ring separated type angular ball bearing 1 is expressed by the following equation when Θ ₁ =Θ ₂ =Θ.

C=Q ₂ +Q ₃ -Q ₁ -2D・sinΘ (1) In the conventional assembly method of inner ring separated type angular contact ball bearings, the contact point pitch of the raceway groove of the double row outer ring in equation (1) Q ₁ and each single row Since it is difficult to accurately measure the raceway groove contact point position dimensions Q ₂ and Q ₃ of the inner ring, the raceway groove pitch P ₁ of the double-row outer ring, which is easy to measure, and the raceway groove position dimensions of each single-row inner ring are
This was done by estimating a predetermined axial clearance C from P ₂ , P ₃ and the ball diameter D, and selecting a combination of the double-row outer ring 2, the single-row inner rings 3 and 4, and the balls 5. However, the axial clearance C of a separable inner ring angular ball bearing is the same as the raceway groove pitch of the double row outer ring.
In addition to the characteristic factors of P ₁ , raceway groove position dimensions of each single row inner ring P ₂ , P ₃ and ball diameter D, outer ring raceway groove radius
The influence of various characteristic factors based on machining dimensional errors such as R ₁ , R ₂ , inner ring raceway groove radius r ₁ , r ₂ , maximum outer ring raceway diameter A ₁ , A ₂ , maximum outer ring raceway diameter B ₁ , B ₂ , etc. As a result, the fit rate of the combination of double-row outer ring and single-row inner ring is poor, and in order to guarantee the allowable value of axial clearance C, it is necessary to perform a 100% inspection after assembly, and the defective rate of axial clearance is also high. There were flaws. In addition, in order to assemble the bearing components so as to obtain an axial clearance within a predetermined tolerance, several types of balls 5 with different ball diameters are prepared in advance, and the double-row outer ring 2, the single-row inner rings 3 and 4, and the balls 5 are prepared in advance. It is necessary to select from a large number of combinations of each machining dimension characteristic value of No. 5, and the selection and combination work is complicated and the work efficiency is extremely low.

The present invention is aimed at solving the above-mentioned drawbacks.
Select and combine one double-row bearing ring, two single-row bearing rings, and a plurality of balls to be fitted into each raceway groove provided in the double-row bearing ring and the single-row bearing ring. In double-row angular ball bearings with separate raceway rings,
The raceway groove contact point pitch of a double-row raceway obtained by measuring the interval between the nominal contact angle positions on each raceway groove surface of a double-row raceway ring, and the nominal contact angle position of the raceway groove surface from the front of a single-row raceway ring. By selecting the combination of the raceway groove contact point position dimensions of the single-row raceway obtained by measuring the dimensions up to and the ball diameter of the balls, the combination of the double-row raceway and the single-row raceway is possible. To provide a method for assembling a double-row angular ball bearing with separate raceway rings, which has a high fitting rate, facilitates selection and combination of bearing components, and easily obtains an axial clearance within a predetermined tolerance. With the goal.

Embodiments of the present invention will be described below based on the drawings.

FIG. 2 shows a measuring device 21 for measuring the raceway groove contact point pitch _Q1 of the double-row outer ring 2, which is the object to be measured.
The measuring device 21 has an upper measuring section 22 and a lower measuring section 23.
The upper measuring section 22 is fixed to a bracket 26 that is slidable up and down on a sliding surface 25 provided on the main body 24. Ball guide surfaces 27 and 28 are provided on the outer peripheral surfaces of opposing ends of the upper measurement section 22 and the lower measurement section 23, respectively.
7, 28 are conical surfaces 29, 30 and cylindrical surfaces 31, 3
It is formed from 2. A hole 33 is provided in the axis of the upper measuring part 22, and a measuring element 34 is inserted into this hole 33.
is inserted. The gauge head 34 is pressed downward by a spring 35.
A spherical contactor 36 provided at the lower end of the lower measuring section 23 can come into contact with the upper end surface 37 of the lower measuring section 23 . The bracket 26 is provided with an indicator 38 and has an upper measuring section 2 fixedly attached to the bracket 26.
The amount of displacement of the lower measuring part 23 with respect to 2 is the measuring element 34
An indicator 38 is used to indicate this. Cage balls 39 and 40 are fitted into each of the outer ring raceway grooves 7 and 8 of the double-row outer ring 2, and each cage ball 39 and 40 is fitted with a plurality of balls 41 and 40, respectively.
42 are loosely inserted and assembled into the retainers 43 and 44, respectively. When the balls 41 and 42 of the retainer-attached balls fitted into the outer ring raceway grooves 7 and 8 are held between the ball guide surfaces 27 and 28 of the upper and lower measurement parts,
The shapes of the ball guide surfaces 27 and 28 are such that the balls 41 and 42 come into contact with each other at a nominal contact angle Θ on the respective outer ring raceway grooves 7 and 8.

To measure the raceway groove contact point pitch _Q1 of the double-row outer ring, first, cage balls 39 and 40 are inserted into each of the outer ring raceway grooves 7 and 8 of the double-row outer ring. Next, one of the retainer balls 40 fitted into the double-row outer ring 2 is supported by the ball guide surface 28 formed at the end of the lower measurement part 23. Next, the bracket 26 slides down on the sliding surface 25 of the device main body, and the lower end of the upper measuring part 22 fixed to the bracket 26 is connected to the other retainer attachment ball 39 fitted into the double-row outer ring 2. , the ball guide surface 27 of the upper measuring section contacts the ball 41 surface of the cage-attached ball, and the balls 41 and 42 of the cage-attached ball contact the ball guide surface 27 of the upper and lower measuring sections. ,28
held by. At this time, the balls 41 and 42 come into contact with each other at the position of the nominal contact angle Θ on the surface of each outer ring raceway groove 7 and 8, and at the same time, the contact 36 provided at the lower end of the measuring element 34 contacts the lower measuring part 23. The raceway groove contact point pitch Q ₁ of the double-row outer ring in contact with the upper end surface 37 is determined by the relative displacement in the axial direction of the double-row outer ring 2 between the upper measuring part 22 and the lower measuring part 23 to a set reference value (reference). It is measured by the indicator 38 via the measuring stylus 34 as a dimensional difference with respect to the measured value (measured when measuring the master).

FIG. 3 shows a measuring device 51 that measures the position dimension Q ₂ of the raceway groove contact point of the single-row inner ring 3, which is the object to be measured, and the measuring device 51 is movable in the direction perpendicular to the reference plane 52. A ball guide surface 56 consisting of a conical surface 54 and a cylindrical inner surface 55 is formed on the inner peripheral surface of the lower end of the inner ring measuring section 53 . A through hole 57 is provided in the axial center of the inner ring measuring section 53, and an abutting member 58 is fitted into this through hole 57 so as to be slidable in the axial direction of the inner ring measuring section 53. Lower end surface 59 of member 58
is the front side 1 of the single-row inner ring 3 placed on the reference surface 52
1. Inner ring measuring section 53
is provided with an indicator 60, and the indicator 60 indicates the amount of displacement of the contact member 58 with respect to the inner ring measuring section 53. A retainer ball 61 is fitted into the inner ring raceway groove 9 of the single-row inner ring 3, and the retainer ball 61 is fitted with a plurality of balls 62.
is assembled by being loosely inserted into the retainer 63. When the ball guide surface 56 of the inner ring measuring section is brought into contact with the ball 61 of the retainer-attached ball fitted into the inner ring raceway groove 9, the ball 61 is brought into contact at the position of the nominal contact angle Θ on the surface of the inner ring raceway groove 9. The shape of the ball guide surface 56 is formed in the ball guide surface 56 .

To measure the raceway groove contact point position dimension _Q2 of a single-row inner ring, first place the single-row inner ring 3 on the reference surface 52 with the front 11 side of the single-row inner ring facing upward, and then place the single-row inner ring 3 on the reference surface 52. The retainer ball 61 is fitted into the groove 9.
Next, the inner ring measuring section 53 is lowered in the axial direction of the single-row inner ring 3 into which the retainer balls 61 have been fitted, so that the ball guide surface 56 of the inner ring measuring section is brought into contact with the balls 62 and below the contact member 58. The end face 59 is brought into contact with the front face 11 of the single-row inner ring. At this time, the balls 62 come into contact with the inner ring raceway groove 9 surface at the position of the nominal contact angle Θ, and the raceway groove contact point position dimension Q ₂ is indicated by the indicator 60 and measured as a dimensional difference with respect to the set reference value.

The raceway groove contact point pitch Q ₁ of the double-row outer ring 2, the raceway groove contact point position dimensions Q ₂ and Q ₃ of the two single-row inner rings 3 and 4, and the ball diameter D of the balls 5 measured as above. By selecting and assembling the combination of double-row outer ring 2, single-row inner rings 3, 4, and balls 5 so as to satisfy the above formula (1) during An axial clearance C within a predetermined tolerance can be obtained. The method of assembling a separable inner ring type angular ball bearing is to measure the raceway groove contact point pitch of the double-row outer ring and the raceway groove contact point position dimensions of the single-row inner ring in advance, sort them according to their size differences, and then adjust any ball diameter size difference. A selection matching method that selects and combines a double-row outer ring and a single-row inner ring that have dimensional differences that match the above, and arbitrarily measured raceway groove contact point pitch of the double-row outer ring and raceway groove contact of the single-row inner ring. A random matching assembly method can be adopted in which ball diameter size differences that match a set of point position dimensions are selected and combined. Also,
Balls 41, 42 and cages 43, 44 in cage attachment balls 39, 40 used when measuring raceway groove contact point pitch _Q1 of the double-row outer ring mentioned above are the double-row outer ring 2 and the single-row inner ring 3, 4. Ball 5 assembled with
It is also possible to use a retainer 6. Therefore, balls with arbitrary differences in ball diameter dimensions fit into the raceway groove contact point pitches measured by inserting cage-attached balls assembled into a cage into each outer ring raceway groove of an arbitrary double-row outer ring. It is also possible to select and combine single-row inner rings having raceway groove contact point position dimensions that have been measured and selected in advance. Furthermore, in the assembly of a double-row angular contact ball bearing with separate outer ring, which is composed of one double-row outer ring, two single-row outer rings, and a plurality of balls, the above-mentioned assembly of a double-row angular contact ball bearing with separate inner ring is also possible. It is possible to adopt an assembly method similar to the above.

The method for assembling a double-row angular ball bearing with separated raceways of the present invention described above includes one double-row raceway ring, two
In a double-row angular ball bearing with separate raceway rings, which selects and combines multiple single-row bearing rings and a plurality of balls that are fitted into raceway grooves provided in a double-row bearing ring and a single-row bearing ring. , the raceway groove contact point pitch of the double-row raceway obtained by measuring the interval between the nominal contact angle positions on each raceway groove surface of the double-row raceway, and the nominal contact angle from the front to the raceway groove surface of the single-row raceway ring. It has the feature that a predetermined axial clearance can be easily obtained by selecting a combination of position dimensions and ball diameter of the balls. The fitting rate of the combination with the inner ring is increased, the work of selecting and assembling the bearing components becomes easier, and the occurrence of axial clearance defects after assembly is eliminated, resulting in a marked improvement in guaranteed accuracy.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing a double-row angular contact ball bearing with separated raceway rings, and FIGS. 2 and 3 are drawings showing an embodiment of the method for assembling the double-row angular contact ball bearing with separate contact rings of the present invention. Fig. 2 is a longitudinal cross-sectional view showing a measuring device for the contact point pitch of raceway grooves of a double-row raceway ring, and Fig. 3 is a longitudinal cross-sectional view showing a measuring device for measuring the position and dimension of raceway groove contact points of a single-row raceway ring. . Explanation of symbols, 2...Double-row outer ring (double-row raceway ring),
3, 4...Single row inner ring (single row raceway ring), 5, 41,
42, 62... ball, 7, 8... outer raceway groove,
9, 10...Inner raceway groove, 11, 12...Front, 22...Upper measurement section, 23...Lower measurement section,
27, 28, 56...Ball guide surface, 39, 40, 6
1...Ball with cage, 52...Reference surface, 53...Inner ring measurement part (single row raceway ring measurement part), _Q1 ...Race groove contact point pitch, _Q2 , _Q3 ...Race groove contact point Position dimensions, Θ, Θ ₁ , Θ ₂ ... Nominal contact angle.

Claims (1)

[Claims] 1 One double-row bearing ring, two single-row bearing rings,
In a double-row angular ball bearing with separate raceway rings in which a plurality of balls fitted into raceway grooves provided in a double-row raceway ring and a single-row raceway ring are selected and combined, each of the double-row raceway rings Balls with a retainer are inserted into the raceway grooves, and the balls are held by ball guide surfaces formed at opposing ends of an upper measuring section and a lower measuring section that are relatively movable in the axial direction of the double-row raceway ring. The relative displacement in the axial direction between the upper measurement section and the lower measurement section is determined by holding the cage attachment balls and bringing the cage attachment balls into contact with the position of the nominal contact angle on the raceway groove surface of the double-row raceway ring. The raceway groove contact point pitch of the double-row raceway obtained by measuring the contact point pitch of the raceway groove of the double-row raceway, and the single-row raceway that was placed on the reference surface by inserting the cage-attached balls into the raceway groove of the single-row raceway. A ball guide surface formed in a single-row raceway ring measuring section movable in the axial direction of the ring is brought into contact with the ball with the cage, and the ball guide surface formed on the single-row raceway ring measuring section movable in the axial direction of the ring is brought into contact with the ball guide surface at the nominal contact angle position on the raceway groove surface of the single-row raceway ring. The position and dimension of the contact point of the raceway groove of the single-row raceway ring obtained by contacting the cage-attached balls and measuring the relative displacement between the front surface of the single-row raceway ring and the single-row raceway measurement part, and the ball A method for assembling a double-row angular ball bearing with separate raceway rings, characterized by selecting a combination with ball diameters to obtain a predetermined axial clearance.