JPS58196939A - Method for arranging balls uniformly and its device - Google Patents

Abstract

PURPOSE:To make a device small-sized in arranging balls uniformly by applying an axial load to an inner wheel after inserting balls between inner and outer wheels and by inserting a needle in sequence in the gap around balls between inner and outer wheels in arranging balls uniformly when assembling a ball bearing. CONSTITUTION:A required number of balls 3 are inserted randomly in the rolling face between an inner wheel and an outer wheel 2, and the balls 3 are gathered at a predetermined position. The inner wheel is depressed from above to apply an axial load F1 so that the balls 3 do not roll arbitrarily. The inner wheel 1 is depressed toward the side where the balls 3 are gathered to apply a radial load F2 so that the balls 3 are made easy to roll. A part of the gathered ball group 3 is moved to the opposite side and the load F2 is released. A needle 6 for arranging the balls uniformly are inserted in the gap around balls between inner and outer wheels 1, 2 and are rotated along the periphery while making a gap between balls 3, 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and device for evenly distributing balls when assembling ball bearings, and particularly to a method and device for distributing balls evenly in small ball bearings of 4i [1 ms+ or less]. 3. In general, in M-type radial ball bearings, which are assembled by inserting a predetermined number of balls between the inner and outer rings and then assembling a retainer, when a predetermined number of balls are inserted between the inner and outer rings, For example, as shown in Figure 1, the balls (A) are not evenly distributed between the inner and outer rings (B) and (E), so the cage cannot be assembled. Therefore, in order to assemble the cage, , as shown in Figure 2 in advance, the ball (
A) must be equally distributed between the inside and outside of the bearing (k) and (c).

Conventionally, various methods and devices for distributing the balls evenly between the inner and outer rings have been known. This is unjust because the gap size (for example, in the case of a small ball bearing with an inner diameter of 6 fins, about .mu.s) is restricted, and therefore, the equal distribution of the balls has been done mainly by hand. As a result, in addition to improving workability and saving labor, the balls cannot be placed evenly and the ball abbreviations must be performed again when assembling the cage in the subsequent process. This is the biggest bottleneck in automating bearing assembly.

In view of the above-mentioned problems, this invention provides one or two needles inside and outside the bearing.
To provide a method and a device for equally distributing balls by vertically moving the balls while rotating along the circumference of the ball, raising the range of the ball arrangement position and lowering the range of the gap between the balls. It is something.

Below, the ball distribution method and device according to the present invention will be explained with reference to the drawings.
1) shows the inner ring, (2) shows the outer ring, and (3) shows the hole!
- ■ First, the rolling I between the inner ring (1) and the outer M (2J)
Divide the required number of balls (8) into one in a random manner7, and make the ball (3) Fg' so that it is smaller as shown in Figure 6.
At this time, the outer ring (2
) is an example of a jig such as a pallet (4) as shown in Figure 4.
) It is fitted into a recessed step (5) formed in L and supported so as not to be displaced in the radial direction.

Blow and press the inner ring (1) from 1) J as shown in Fig. 4 to give it an axial direction (g 1), and then press the inner ring (1) as shown in Fig. 4
The raceway surface between the outer and outer rings (2) is pressed to prevent the ball (8) from transferring unnecessarily. Then, in this state, the inner ring (1) is moved as shown in Figure #j5. ball(
3) applies a radial load (?2) by pressing toward the side where the balls (s) are gathered on one side, and the inner and outer shafts (1) (2) on the opposite side to the side where the balls (s) are gathered on one side. The distance between the rolling surfaces of the ball is slightly increased to make it easier for the ball to move even when the ball is in a pinched state with a load in one direction (?1).

■ Then, one part (at least one) of the group of l-rules (3) gathered at a predetermined position within the rolling l between the inner and outer shafts (1) (21) is placed as shown in Figure 6. Move to the opposite direction and scatter the balls (8) in 2 [* locations by the number of balls (8). After this, cancel the # storm (1'i) in the radial direction. Collect the balls (δ) The purpose of moving the koji from the number 1 to the opposite side is to prevent the inner ring (1) from being pushed by the balls (8) and shift to one side, and at the same time to prevent the inner ring (1) from being pushed to one side by the balls (8). This is to prevent the button from breaking, which can easily occur if the needle pushes all the balls at once.

■ Next, insert the hot needle (6) between the inner and outer sides (circle between 5 bars 2) and between the holes, and place this needle (6) in the reassembly position range of the 7th iQ & - hole (8). (In al, raise the ball (8) by 81 times (in BL, raise the ball (8)) (in BL, lower the vertical movement by one step, return the stock, and move the circumference between the inner and outer axes (1) and (2). −
The ball (8) is rotated along the rolling surface between the inside and outside tH4ill (2) as shown in Fig. 8.
·do.

According to the ball equal distribution method of the present invention explained above, the gap between the balls (3 rings (3)) and the inner and outer rings (1) (2
1 interval υ) Interval - Due to size restrictions, it was not possible to insert the evenly distributed m tool into the era name due to the weight of the equally distributed tool, or because it was a streetcar, or the occurrence of ball scratches, etc. 10 The small ball of Tomo F - to the ball of F IJ;
Is it true?
''), the balls (8) are evenly placed in the pinched rice, so the ball (8) is evenly placed (k times 1 U) d<-ru (a + W
Ms. Ika [,] (The former runaway to freedom was stopped)
(Original), the name of the ball (3), there is no wobbling, it is possible to improve the level of even distribution to the level of 1, and it also saves a lot of labor.
fJ can be achieved.

Next, an embodiment of an apparatus shown in FIGS. 9 and 10, which is directly used to carry out the invention of the method for distributing a ball at a school, will be described.

In the drawing, (to) is the machine body, and (b) is the elevating body installed on the 1 & machine body wheels so that it can be raised and lowered, and the kite rod cL11 (slidably inserted into the liii) hung on both sides of the machine body Above and below between the sliding members (b) and (b), the frame members (2)
) and a horizontal 1% K! The frame member is connected to an elevating cylinder (b) fixed to the upper part of the delicate main body, and by expanding and contracting this cylinder, it is guided to the guide rail (b) (b). Up-drive in condition. B) is a U-shaped machine frame with bfil & on the elevating body (B),
(B) is on the machine frame) upper and lower arms (16a) (16b) &
The cam beak holding tube is rotatably supported via the knee receiver (↓8-hsb) and on the slide 0.The cam beak holding tube is attached to the outer periphery l of the intermediate portion of the holding tube, and the one wheel and one wheel are connected to each other.
It is connected to the deceleration motor through the deceleration motor, and by driving the deceleration motor), one shaft rotates through φυ) and (b). In addition, - heavy wheels and one wheel have a gear ratio of 1:
1 so that they rotate synchronously. The ring is a metal bush (24a) (24
The inner ring holder (23a) is attached to the lower end of the inner ring holder shaft (Np11M), which can be slid up and down via b). A spring is used to release the pressure from the pole cam disk installed on the ti b). The cam board (corporate) has the upper th1 periphery as shown in Figure 11.The rotation angle range of the pole &'axe position that prevents the J no gong is the protrusion, and the rotation angle range between the balls is the limb φ*kic. In the part where the stylus (6&) is in pressure contact with the convex part, the cam beak retaining cylinder uO is in a concave shape with respect to the shaft frame (b), and the stylus is in concave part 84. (26a) is depressurized, the cam beak holding cylinder 07) is attached to the machine frame (1, - is the same as 10V!! A rotation detection switch is installed in correspondence with the rotation detection cam through a placket on the mounting plate of the motor (-), which detects the rotation speed of the rotation detection cam 4, In the example, when it reaches 2 to 3 rotations), the motor is stopped and the cam beak holding cylinder (
b) Immediately stop the rotation of the cam beak. The ring is a small ball bearing that allows balls to be evenly distributed in the device of this invention, and is held on a pallet conveyed by a turntable that rotates intermittently along each station. As shown in cam beak holding cylinder (b)
A cap is placed directly below the inner ring presser shaft. - is a ball dispensing needle that can be inserted into the gap between the inside and outside of the bearing ring, and is attached eccentrically to the cam beak holder @ t17+. - is a stopper protruding from 'F110 of the crosspiece W of the lifting body (6), which comes into contact with a stopper receiver 90 attached to the lifting body 4 to stop the lifting body (11) at a fixed position.

Furthermore, as shown in Fig. 12, the pallet has a concave iR on the top surface.
part (34 m), and this l! l! J stage h (34
Inner bearing $11 to the outer shaft (33 &) of the bearing which was held at m)
(33fi) is suspended through the hole (33o) to hold the bearing ring, and a guide pin is pushed through the bearing (33b) and guided against the spring m using a plunger or the like. Press the bottle against the bearing inner ring (33b) to close the bearing! Apply a radial load to &1.

Next, the operation state 11# of the ball equalizing device of the present invention will be explained.

The bearing ring is held on a pallet IH&: with a predetermined number of balls distributed at two locations within the circumferential gap between the inner and outer rings of the bearing as shown in FIG. 6, and is supplied as shown at point 111ii11 in FIG. Then, first, the elevating cylinder (to) is extended and the elevating body (b) is lowered to lower the entire ball unit. At the same time as the descent, the inner ring of the bearing (33m)
The inner ring is pressed elastically from above, and the needle ■
The tip of the is inserted into a predetermined position between the circumferences between the inner and outer shafts (33 to (33b)).Then, the stopper 94f) of the elevating body (b) comes into contact with the stopper receiving piece and the poles are evenly spaced. The unit stops at the W+ constant position. When the inner part (33a) is pressed from above and the tip of the needle is inserted, the deceleration motor (33a) is driven and the cam beak holding cylinder (B) is moved through the gears ψυ- and (B). Rotate and force A
Rotate the beak. Then, the cam beak holding cylinder (b)
The needle is moved up and down by the unevenness of the cam disk that engages with the stylus (26&) of the cam beak while rotating, so the needle is moved up and down by the circumferential gap between the inner and outer rings (33m) (33+) of the bearing -. The rotation angle range of the ball arrangement position rises while the rotation angle range of the ball placement position moves up and down while the rotation angle range of the L-ru gap moves downward. As a result, the inner and outer rings of the bearing (
33m) The balls (33o), which had been scattered at two locations each on the rolling surface between the balls (33b), are equally distributed at predetermined positions. At this time, evenly distributing the balls (33o) is completed with one rotation of the needle, but the reason why the needle is rotated 2 to 3 [g1] is to correct or check the misalignment of the balls. This is to improve certainty. When the equal distribution of the balls (33o) is completed and the rotation detection switch detects through the rotation detection cam that the needle has rotated 2 to 6 times, the deceleration motor () stops and the lifting cylinder () contracts and the elevating body (
B) is raised in an upward direction to L, and the entire ball abbreviation unit is returned to the position W before operation. In addition, the bearing whose balls have been equally spaced is assembled by inserting a retainer at that position or in the next process.

In the above embodiment, the number of needles is set at one rate, but depending on the number of balls, even if there are two needles, it is possible to equally distribute the balls.

In addition, in the above embodiment, an apparatus configured as a device for performing the III distribution of balls from the state shown in FIG. 6 to that shown in FIG. 2 is shown, but by changing the cam disk (c), It is also possible to modify the device so that the balls are dispersed to the state shown in FIG.

According to the ball equalizing device of the present invention described above, the holes of small ball bearings with an inner diameter of 10 mm or less can be automatically, quickly, and accurately distributed, thereby saving labor in ball abbreviation work. can be greatly improved.

The method and device for equally distributing balls of this invention have an inner diameter of 10
It is most effective when applied to ball bearings with an inner diameter of +w or less, but it goes without saying that the present invention is not limited thereto and can be applied to general ball bearings with an inner diameter of 10111 mm or more.

[Brief explanation of drawings]

Figure 1 is a front view of a bearing with almost no distribution of balls, Figure 2
The figures are front views of bearings with approximately distributed balls, Figures 3 to 8.
The figure is an explanatory diagram showing the procedure of the ball equalizing method of the present invention, FIGS. 9 and 10 are main part sectional front and side views showing an embodiment of the ball equalizing device of the present invention, and FIG. 11 is a cam FIG. 12 is a drawing showing a part of the unevenness of the board developed, and FIG. 12 is a drawing showing the pallet. (m)...ball distribution unit, (to)...machine body, a
υ...Lifting body, (C)...Cylinder for lifting, (B)...Machine frame, (B)...Cam beak holding cylinder, (B)...Reducing station motor,
■...Inner presser shaft, (lad@@inner presser shaft, ---cam beak, (26&)...stylus, fork...cam disc,
−・・Rotation detection cam, −・・Rotation detection switch, −・・
bearing. Ebara Ka III Trowel No. 3 - 5th VA Figure 2 Figure 4 vso diagram

Claims (2)

[Claims] (1) Hold the inner shaft of a bearing with a predetermined number of balls inserted between the inner and outer rings while applying an axial load, and place one or two balls in the circumferential gap between the inner and outer rings of the bearing. Insert the needle, and while rotating the needle within the circumferential gap, repeat vertical movements such that the range of the ball placement position rises and the range of the position between L and L descends, thereby distributing the balls equally. A ball distribution method with a special grade. (2) A deceleration motor that is rotatably installed in a machine frame that is integrally attached to an elevating body that is installed in the machine body so that it can be raised and lowered, and that is slidable up and down. It is attached to the lower end of a cam beak holding cylinder that is rotated by the cam beak holding cylinder, and an inner ring holding shaft that is installed to be able to slide up and down inside the cam beak holding cylinder and is always elastically pressed downward by a spring wound around the outer periphery. It is attached to one part of the machine frame concentrically with the inner ring retainer and the cam beak holding cylinder, and the rotation angle range of the ball placement position is a protrusion, and the rotation angle range of the gap between the balls is a continuous concave and concave surface. A cam disc for ball alignment, a cam beak that is integrally attached to the cam beak holding cylinder and the N8, and a cam beak that elastically presses a stylus protruding from the lower surface against the unevenness of the cam disc, and a cam beak that is integrally installed with the cam beak holding cylinder. , a needle such as a ball is inserted into the gap between the inner and outer rings of the bearing at the descending end of the elevating body, and the needle such as the ball is moved vertically while rotating within the circumferential gap between the inner and outer rings of the bearing. A ball abbreviation device characterized by