JPS625863Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a ball equalizing device that evenly distributes balls gathered at a predetermined angle between the inner and outer raceway rings during the assembly process of a ball bearing.

Generally, in order to evenly distribute the balls gathered on one side at a predetermined position between the inner and outer raceways of a ball bearing (hereinafter simply referred to as a bearing), a divider as shown in Fig. 12 is used between adjacent balls. (equally spaced) taper combs 30 are inserted through the combs by a predetermined stroke. This tapered comb 30 has a long tapered part 3 in order to move the balls 31 gathered on one side to predetermined equidistant positions in the circumferential direction of the bearing rings 32 and 33.
0' (large dimensional difference between the longest comb and the shortest comb), and therefore the tapered comb 30 requires a considerably long insertion stroke.

However, in a bearing 1 for an automobile clutch having a flange 1' on the inner ring as shown in Fig. 1, it is not possible to insert the tapered comb of the divider sufficiently between adjacent balls. I was doing it. As a result, there is the problem of reduced workability and the problem that the balls cannot be accurately distributed evenly, and the ball must be evenly distributed again when inserting the retainer in the subsequent process. Equal distribution has become the biggest hurdle in automating bearing assembly.

This device is a ball distribution device that distributes the balls of the above-mentioned bearing evenly between the inner and outer raceway rings, where conventional dividers cannot be used. an internal gear that is driven to rotate; a rotating disc that is caused to rotate by each internal gear by a clutch each having a predetermined play angle; and a ball-shaped pawl that is attached to each rotating disc. between the inner and outer bearing rings of the ball bearing, each ball, which is once biased to one side, is pressed from above into a narrow pressure state with evenly spaced claws, and the rotating disk is rotated by a predetermined angle along the circumferential direction, The ball is distributed evenly.

Embodiments of this invention will be described below with reference to the drawings.

Figure 2 shows a side view of the ball equalizing device, where 2 is the bed of the ball equalizing device, 3 is a frame fixed to the top surface of the bed 2, and 4 also serves as a support column fixed to the upper and lower ends of the frame 3. The fixed piston 5, which also serves as a movable cylinder of the fixed piston 4, moves up and down along the fixed piston 4. Reference numeral 6 denotes a rotation prevention protrusion protruding from the outer peripheral surface of the movable cylinder 5, which fits into the vertical groove 7 of the frame body 3.
Numeral 8 is a ball equal distribution unit attached to the movable cylinder 5 via a mounting flange, and 9 is a deceleration motor that stops when a certain load torque is reached and then rotates in reverse to drive the equal distribution unit. Reference numeral 10 denotes a bearing centering hole that is shallowly bored on the bed 2 and coaxial with the center axis of the ball equal distribution unit 8.

Figure 3 shows balls arranged randomly between the inner and outer raceway rings in the X-
The bearings 11 are shown assembled on one side so that the center ball 11a is located on the X-axis. This bearing 11 is transported by a transport device (not shown) so that the center ball 11a is located on the Xa side, for example, on the Xa-Xb axis passing through the center of the centering hole 10 shown in FIG. It is held by the centering hole 10. Reference numeral 12 denotes an extrusion pin having a diameter smaller than that of the centering hole 10. This ball distribution device equally distributes the balls, and if necessary, pushes up the bearing in which the retainer is inserted in order to transport it to the next process.

FIG. 4 shows a side sectional view of the ball equal distribution unit 8, in which 13 is the mounting base of the ball equal distribution unit 8, 14 is a cylindrical outer cylinder fixed to the lower surface of the mounting base 13, and 15 is the outer cylinder 14. A rotating disk 16 is loosely fitted into the inner diameter of the rotating disk 15, and drives the rotating disk 15 via a clutch 17, which will be described below.

That is, as shown in FIG.
A fan-shaped notch 17b is provided by cutting out the inner wall of the rotating disk 15 in correspondence with the fan-shaped projection 17a.
The length of the circular arc of the sector-shaped notch 17b is larger than that of the sector-shaped protrusion 17a to provide a predetermined play angle α. Reference numeral 18 denotes an equidistant arm whose base is fixed to a part of the outer circumference of the rotating disk 15 along the outer periphery of the outer cylinder 14; 19 is a guide groove cut out in the circumferential direction of the peripheral wall of the outer cylinder 14; The base of the notch is inserted through the notch, and the angle of rotation of the equidistant arm 18, that is, the equidistant angle is regulated by the angle of the notch.
Now, in FIG. 5, when the internal gear 16 is turned by a turning angle θ, for example, counterclockwise, the clutch 17 is engaged when the internal gear 16 turns counterclockwise in advance by the play angle α. After that, internal gear 1
6, the rotating disk 15 is integrally rotated counterclockwise, and as a result, the rotating disk 15 and its equidistant arms 18 are set at a predetermined equidistant angle, that is, β excluding the play angle α immediately after the start of the rotation. =θ−α can be turned.

As shown in FIG. 4, an evenly distributed claw 20 is attached to the lower end of the evenly distributed arm 18.
0 is the bearing 1 at the lower end of the equal distribution unit 8.
The top of ball No. 1 is pressed from above into a pinched state (see Fig. 6). In Figure 4, 2
1 is a fixed arm whose base is fixed to the upper end of the outer cylinder 14;
A fixing pawl 22 is attached to the tip, which fixes the central ball 11a of the bearing 11 held in the centering hole 10 in a predetermined position.

The above-mentioned evenly spaced claws 20, equally spaced arms 18, and internal gear 16
As shown in FIG. 4, n-1 rotating discs 15 are used for every n balls in the bearing 11, and each rotates independently within the outer cylinder 14 with a predetermined angle of play. They are stacked in n-1 stages for accommodation and support.

In FIG. 4, 23 is a first gear fixed to the output shaft end of the deceleration motor 9, 24 is a drive shaft supported via a bearing on the mounting base 13 of the ball distribution unit 8, and the first gear 23 is attached to the upper end. A second gear 25 that meshes with is fixed. Reference numeral 26a denotes an internal gear that meshes with even-numbered internal gears 16 counted from above the outer cylinder 14 and rotates the internal gears 16 counterclockwise when viewed from above.
1)/2 pieces are arranged. Reference numeral 27 denotes a driven shaft that has the same number of teeth as the third gear 28 fixed on the drive shaft 24 and is driven by a fourth gear 29 that meshes with the third gear 28 . 26b is an internal gear that similarly meshes with the odd-numbered internal gear 16 and drives this internal gear 16 to rotate clockwise.It has the same number as the internal gear 26a of the drive shaft, and has a n-1)/2 pieces are arranged.

The internal gears 16 of each stage have their respective equal distribution claws 20 at the ball uniform distribution start position, that is, at the position where the previous ball uniform distribution work has been completed and the ball has returned to the ball uniform distribution start position, as shown in FIG. As shown in the figure, the deceleration motor 9 is started to press the tops of the balls gathered on one side, and the work of distributing the balls is started. The arrangement position of the equidistant arm 18 provided at each stage, the circumferential length and formation direction of the guide groove 19, and the clutch direction are determined so that the equidistant pawls 20 rotate by a predetermined equidistant angle to distribute the balls equidistantly. The play angle α of 17 is set in advance.

By the way, FIG. 6 shows the development of the inner and outer bearing rings of the bearing 11 in the state in which the balls are shifted to one side in FIG. The state in which the top part is pressed in a pinching state is shown, and as the internal gear 16 rotates, each evenly spaced claw 20 rotates from the fixed claw 21 toward both sides.
0 is disposed on one side of the fixed claw 21, and odd-numbered equally spaced claws 20 are disposed on the other side.

FIG. 7 is a developed view in which the deceleration motor 9 is started and each equidistant pawl 20 turns by a predetermined equidistant angle β=θ−α, and the balls are equally distributed between the inner and outer raceway rings. shows. Then, each rotating disk 15 is
The predetermined equidistant angles β ₁ , β ₂ , ...β _o-2 , shown in the figure
In order to regulate β _o-1 , each guide groove 19 is made to have a length according to the equidistant angle (swivel angle), and with the fixed arm 21 in the center, the outer cylinder 14 is aligned in the rotation direction of each equidistant arm 18. Install by drilling the surrounding wall. Next, in order to turn each turning disk 15 by the predetermined equal angle (swivel angle) by turning the internal gears 16 of all stages by θ degrees, the play angle of the clutch 17 of each stage is set to α. ₁ = θ-β ₁ , α ₂ = θ-β ₂ ... α _o-2 = θ
−β _o-2 , α _o-1 = θ−β _o-1 , α ₁ = α ₂ , α _{3
= α4} , _.

The operation of the ball evenly distributing device having the above configuration will now be described.

Bearing 1 where the balls are gathered together between the inner and outer bearing rings by the ball gathering machine in the previous process.
The ball 11a with 1 in the center is shown in Figure 2 as Xa-Xb.
When placed in the centering hole 10 aligned with the X side of the shaft, working fluid first flows into the lower chamber of the cylinder 5, and the ball distribution unit 8 descends together with the cylinder 5. At this time, the ball distribution unit 8
When the internal gears 16 of each stage are in the rotation return position, the fixed pawl 22 touches the top of the central ball 11a,
Further, each equal distribution claw 20 pinches the top of the corresponding ball, and the ball equal distribution unit 8 stops descending.

Next, the deceleration motor 9 starts clockwise, and this rotation is sequentially transmitted to the first gear 23, second gear 25, third gear 28, and fourth gear 29, thereby driving the drive shaft 24 and the driven shaft 27. rotate in opposite directions at the same speed. Due to the above rotation, each internal gear 26a disposed on the drive shaft 24 rotates counterclockwise, and the even-numbered internal gears 16 in mesh with each other are rotated counterclockwise by a predetermined rotation angle θ. Similarly, each internal gear 26b disposed on the driven shaft 27 corresponds to the internal gear 1 of odd-numbered stages.
6 is rotated clockwise by a predetermined rotation angle θ.

When each internal gear 16 rotates, the final even-numbered rotating disk 15 with the smallest free play angle α of the clutch 17 and the odd-numbered rotating disk 15 one step before the final even-numbered rotating disk 15
are first pivoted in opposite directions by the respective internal gears 16.

8 and 9 show the internal gear 16 of the odd-numbered stages.
It represents the position where the wheel has returned to its rotation (equal distribution start position) and the position where it has completed turning counterclockwise by a predetermined turning angle _θ (equal distribution completion position). It can be seen that the equidistant angle β _o-2 =θ−α _o-2 when the equidistant arm 18 abuts the end of the guide groove 19 is large. In other words, the equidistant angle β becomes larger as the equidistant claws 20 sandwich the ball further away from the center ball 11a.

Figures 10 and 11 show the position where the final even-numbered internal gear 16 has returned to its rotational position (equal distribution start position).
represents the position where rotation is completed in the clockwise direction by a predetermined turning angle θ (equal distribution complete position), and the clearance angle α _o-1 = α _o-2
Therefore, the equidistant claws 20 have the same equidistant angle β _o- as above.
₁ = θ−α Spreads in the opposite direction by _o−1 .

Thereafter, the ball rotates in the same manner sequentially starting from the rotating disk 15 with the smaller play angle α, and finally the ball 11 in the center
Equally spaced claws 20 that sandwich adjacent balls on both sides of a
The guide groove 19 rotates by a predetermined equidistant angle β ₁ =θ−α ₁ , β ₂ =θ−α ₂ until it comes into contact with the end of the guide groove 19 .

At the end of the rotation, that is, when the equal distribution of the balls is completed, each equal distribution arm 20 simultaneously moves into each guide groove 1.
9, the overload at this time is detected and the deceleration motor 9 is stopped, and the working fluid flows into the upper chamber of the cylinder 5, causing the cylinder 5 and the ball distribution unit 8 to rise to the rising end. . The deceleration motor 9 then rotates in reverse until each equidistant pawl 20 and the internal gear 16 of the swivel disk 15 are returned to the swivel return position. still,
After the balls have been equally distributed, a retainer is inserted into the bearing 11 at that position or in the next process.

In the embodiment, a pair of adjacent even-numbered and odd-numbered rotating disks 15 is provided, and (n-1)/2 pairs of rotating disks 15 are provided, and the equidistant angles β of the left and right pairs of rotating disks 15 are made equal. . However, in a bearing with an even number of balls, if the fixed pawl 22 is removed, the final stage rotating disk 15, internal gear 16, etc. are separated from the pair and become independent. However, by independently determining the turning direction and equidistribution angle of the rotating disk 15, it is possible to equidistribute the balls regardless of whether the number of balls is odd or even.

As explained above, this invention consists of a plurality of internal gears that are rotatably and coaxially stacked in an outer cylinder, each of which meshes with the internal gears independently, and drives the internal gears to rotate. a plurality of stages of internal gears, and a turning circle that is loosely fitted around the outer periphery of each internal gear with a predetermined play angle in the turning direction, and can be turned independently by the turning movement of each internal gear. board and
Consisting of a plurality of equally spaced ball pawls attached to a rotating disk, the balls that are biased between the inner and outer raceways of the ball bearing are pressed from above into a pinched state, and the balls are pressed between the inner and outer raceways of the ball bearing. It relates to a ball distribution device that rotates a predetermined equidistant angle along the circumferential direction of a ring, and can be used not only for equal distribution of balls in general bearings, but also for dividers such as bearings for automobile clutches that have a flange on the inner ring. It is possible to accurately and automatically distribute the balls of a ball bearing that cannot be sufficiently inserted with a tapered comb, and it is possible to achieve a great labor saving in the work of distributing the balls. In addition, since the tops of the balls are evenly spaced under pressure, the posture of the balls is stable during evenly distributing (while rotating), there is no wobbling of the balls, and the uniformly distributing accuracy is greatly improved. be able to. Furthermore, since a large number of balls are not equally distributed at the same time, but are equally distributed starting from the balls at both outer ends, interference between the balls does not occur, and problems such as not being hit or being scratched do not occur. Further, since there is no interference between the balls, no unreasonable force is applied to the evenly spaced claws and their drive mechanism, and stable operation can be maintained over a long period of time.

[Brief explanation of the drawing]

FIG. 1 shows a side view of a bearing for an automobile clutch in which the tapered comb of the divider cannot be sufficiently inserted between adjacent balls. 2 and 4 show an embodiment of the ball equalizing device according to the present invention, with FIG. 2 showing a side view thereof, and FIG. 4 showing a sectional view of the ball equalizing unit. FIG. 3 shows a front view of a ball bearing in which balls are equally distributed by this ball equalizing device. FIG. 5 shows a cross-sectional view taken along line A-A of the ball equal distribution unit,
FIGS. 6 and 7 are expanded views of the inner and outer bearing rings, showing the positions of the evenly spaced pawls before and after the balls are evenly spaced. FIGS. 8 to 11 are diagrams for explaining the positional relationships of the internal gears, turning discs, clutches, etc. of even-numbered stages and odd-numbered stages when the rotation returns and when the rotation is completed. Figure 12 shows a conventional tapered comb,
FIG. 13 is a drawing showing the method of equal distribution. 15...Swivel disk, 16...Multi-stage internal gear,
17... Clutch, 20... Equally spaced pawl, 24... Drive shaft, 26a, 26b... Internal gear, 27... Driven shaft, α... Play angle, β... Equally spaced angle.

Claims (1)

[Scope of utility model registration request] A plurality of stages of internal gears rotatably and coaxially stacked in an outer cylinder, and a plurality of stages of internal gears each independently meshing with the internal gears and driving the internal gears to rotate. a rotating disk that is loosely fitted around the outer circumference of the internal gear with a predetermined play angle in the rotating direction and that can be rotated independently by the rotating movement of each internal gear; and a plurality of rotating disks that are attached to the rotating disk. The ball bearing's evenly spaced claws press the balls, which are biased between the inner and outer raceways of the ball bearing, from above in a pinched state, and the balls are pressed along the circumferential direction of the inner and outer raceway rings. A ball equalization device characterized by rotating a predetermined equal distribution angle.