JP4203475B2 - Ball array device for bearing - Google Patents

Description

  The present invention relates to a ball arraying device that evenly arranges balls of a bearing between an inner ring and an outer ring.

  In the ball bearing, a plurality of balls are evenly arranged in a ring-shaped gap formed between the inner ring and the outer ring. The balls are evenly arranged by a cage or the like. In this ball bearing, it is necessary to put a predetermined number of balls between the inner ring and the outer ring and to arrange the balls evenly. In a state where the balls are evenly arranged, a cage is inserted between the inner ring and the outer ring to hold the balls at regular intervals. Therefore, the ball bearing needs to arrange the balls evenly in the assembly process.

  A device that reciprocates a comb that connects a plurality of gap adjusting rods in a ring shape is used as a device for uniformly arranging balls. As shown in FIG. 1, the comb is inserted into the ring-shaped raceway groove 44 in order from the long gap adjustment rod 41 by gradually increasing the length of the gap adjustment rod 41 connected in a ring shape. Are arranged evenly. In this ball arrangement device, it is necessary to increase the number of gap adjusting rods 41 of the comb 40 as the number of balls 45 put into the ring-shaped track grooves 44 increases. Since the gap adjustment rod 41 has a difference in length from the adjacent gap adjustment rod 41 to about the diameter of the ball 45, the total difference between the long gap adjustment rod 41 and the short gap adjustment rod 41 increases as the number increases. For this reason, when the short gap adjusting rod 41 is inserted into the ring-shaped raceway groove 44 in order from the long gap adjusting rod 41 first, and all the balls 45 are evenly arranged, the stroke of the comb 40 becomes large. Further, in order to put the cage between the balls 45 arranged evenly, the stroke when all the gap adjusting rods 41 of the comb 40 are pulled out from between the balls 45 is also increased. That is, there is a drawback in that the gap adjusting rod 41 of the comb 40 has a large stroke to be taken in and out of the ring-shaped track groove 44 and cannot be quickly put in and out of the ring-shaped track groove 44 in a short time. For this reason, there is a drawback that the tact time for equalizing the balls of one bearing becomes long. In order to eliminate this drawback, if the gap adjusting rod is inserted into the ring-shaped track groove at a high speed, it becomes difficult to evenly arrange all the balls. Further, if the ball is pulled out from the ring-shaped raceway groove at a high speed, there is a disadvantage that the balls move due to an impact at the time of pulling out and are not evenly arranged. Moreover, when the comb is taken in and out at high speed, the gap adjusting rod rubs the ball and scratches it.

Developed as a ball array device that eliminates these disadvantages, a device that evenly arranges balls by placing swinging claws in the ring-shaped track groove, and a device that radiates air to the ring-shaped track groove and equalizes the ball (See Patent Documents 1 to 3).
JP-A-9-225757 JP 2001-241458 A JP 2002-161926 A

  Patent Document 1 describes a ball array device shown in FIG. This ball arraying device includes a shaft 55 that passes through the shaft hole 52A of the inner ring 52 of the bearing 51 and can be shifted in the axial direction, and a guide ring 56 that allows the shaft 55 to pass through the center. The shaft 55 is provided with a spiral stepped portion 55A at the tip. In the guide ring 56, swinging claws 57 that protrude into the ring-shaped raceway groove 54 of the bearing 51 corresponding to the passage of the spiral stepped portion 55 </ b> A are equally arranged in the circumferential direction by the same number as the number of balls of the bearing 51. . In this ball arranging device, the shaft 55 is moved in the axial direction, and the swinging claw 57 is projected from the guide ring 56 to the ring-shaped track groove 54 of the bearing 51. Corresponding to the passage of the spiral step portion 55A formed at the tip of the shaft, the swinging claw 57 sequentially protrudes into the ring-shaped track groove 54, and each swinging claw 57 is interrupted one by one between each ball. .

  Patent Document 2 describes a ball arrangement device that uniformly arranges balls with air. In this ball arraying device, an inner ring and an outer ring constituting a bearing are placed on the inner ring placement block and the outer ring placement block independently of each other. Further, compressed air is ejected from a plurality of nozzles constituting the nozzle device, and the ball is moved to a portion facing the nozzle by the force of the compressed air. At this time, the inner ring and the outer ring are relatively displaced so that the ball is reliably moved. In addition, a plurality of balls are moved in the circumferential direction of the inner ring and the outer ring by the force of the pressure fluid caused by another nozzle to ensure the movement of the balls.

  In the ball arrangement device described in Patent Document 3, the eccentric moving device (pressing moving means) pushes the outer ring radially in the radial direction with respect to the inner ring, and rotates the outer ring to rotate a plurality of balls. Are dispersed and moved along the circumferential direction in the ring-shaped raceway groove. Further, the nozzle device ejects air from the ejection port into the ring-shaped raceway groove, and holds the plurality of dispersedly moved balls at equal intervals.

  In the ball arrangement device described in Patent Document 1, a guide ring is arranged above a bearing, a swinging claw provided on the guide ring is tilted, and the tip of the swinging claw is placed between the balls to evenly distribute the balls. Deploy. This structure has a drawback that when the bearing becomes extremely small, the swinging claw also becomes small, and it is difficult to stably and evenly arrange the balls so as not to cause failure. Further, since the guide ring is disposed above the bearing, it is not possible to put a cage or a spacer in the ring-shaped raceway groove in a state where the balls are evenly disposed. After removing the guide ring from above the bearing, it is necessary to set a cage and a spacer. For this reason, there exists a fault which the position of a ball | bowl tends to shift | deviate after removing a guide ring and setting a holder or a spacer.

  Moreover, since the ball arrangement apparatus shown in Patent Documents 2 and 3 arranges the balls evenly with air, there is a drawback that it becomes difficult to arrange the balls evenly with air if the balls become large and heavy. Further, since the amount of air consumption increases rapidly as the balls become larger, there is a drawback that the balls cannot be efficiently and evenly arranged.

The present invention has been developed for the purpose of solving such drawbacks of the conventional apparatus. An important object of the present invention is to provide a ball arrangement device capable of efficiently arranging balls from a small bearing to a large bearing while reducing the tact time.
Another important object of the present invention is to provide a ball arranging device that can set a cage and a spacer while holding the balls arranged evenly so as not to be displaced. .

The bearing ball arrangement apparatus according to claim 1 of the present invention is a base for setting an unaligned bearing 1 ′ in which a plurality of balls 5 are placed in a ring-shaped raceway groove 4 provided between an inner ring 2 and an outer ring 3 in a fixed position. The base 10 and the ring 10 of the unaligned bearing 1 ′ set on the base 10 are connected on the circumference of the base 10 so as to move in the axial direction, and the ring of the unaligned bearing 1 ′ A plurality of gap adjusting rods 11 that are inserted into the ring-shaped track grooves 4 to evenly arrange the balls 5 of the ring-shaped track grooves 4, and an extrusion mechanism 12 that sequentially pushes the plurality of gap adjustment rods 11 into the ring-shaped track grooves 4. I have. The gap adjusting rod 11 is connected to the base 10 so as to be inserted into the ring-shaped track groove 4 independently. In the ball arraying device, the push-out mechanism 12 inserts the balls 5 evenly by sequentially inserting them into the ring-shaped track grooves 4 while relatively moving the plurality of gap adjusting rods 11.

Ball array apparatus of the present invention, the pushing mechanism 12 shall be the cam mechanism 24. The cam mechanism 24 can include a planar cam 28 that moves in the radial direction of the ring-shaped track groove 4 and pushes the plurality of gap adjusting rods 11 sequentially into the ring-shaped track groove 4.

In the ball arraying apparatus of the present invention, the cam mechanism 24 moves in the radial direction of the ring-shaped track groove 4 to cause the plurality of gap adjusting rods 11 to be inserted into the ring-shaped track groove 4 in order, and the plane cam. obtain Bei a drive mechanism 29 for moving the 28 in the radial direction.

  In the ball arraying apparatus of the present invention, a pair of gap adjustment rods 11 arranged at positions orthogonal to the moving direction of the plane cam 28 are connected to each other, and the pair of gap adjustment rods 11 connected together by the plane cam 28. Can be moved up and down.

  The ball arraying apparatus of the present invention connects the guide rod 19 to the clearance adjustment rod 11, connects the clearance adjustment rod 11 and the guide rod 19 in parallel to each other, and connects to the base 10 so that it can move in the axial direction. The guide rod 19 can be driven by the extrusion mechanism 12 and the gap adjusting rod 11 can be inserted into the ring-shaped track groove 4.

  In the ball arraying apparatus of the present invention, the guide rod 19 can be disposed outside the gap adjusting rod 11 and both the guide rod 19 and the gap adjusting rod 11 can be connected to the base 10 so as to be movable in the axial direction. .

  In the ball arraying apparatus of the present invention, the unaligned bearing 1 ′ can be mounted on the upper surface of the base 10 and the guide rod 19 and the gap adjusting rod 11 can be pushed up and inserted into the ring-shaped track groove 4.

The ball arraying apparatus according to claim 5 of the present invention is a base 10 for setting an unaligned bearing 1 ′ in which a plurality of balls 5 are placed in a ring-shaped raceway groove 4 provided between an inner ring 2 and an outer ring 3 at a fixed position. And a ring-shaped raceway of the non-aligned bearing 1 'connected to the circumference of the base 10 so as to move in the axial direction to the ring-shaped raceway groove 4 of the unaligned bearing 1' set on the base 10 A plurality of gap adjusting rods 11 inserted into the grooves 4 to evenly arrange the balls 5 of the ring-shaped track grooves 4 and an extrusion mechanism 12 for sequentially pushing the plurality of gap adjusting rods 11 into the ring-shaped track grooves 4 are provided. Yes. In the ball arraying device, the unaligned bearing 1 ′ is mounted on the upper surface of the base 10, and the gap adjusting rod 11 is pushed up and inserted into the ring-shaped track groove 4. Further, the ball arranging apparatus has a guide rod 19 connected to the gap adjusting rod 11 and elastically presses the surface of the guide rod 19 to push up the guide rod 19 that cannot be pushed up by the pushing mechanism 12 with frictional resistance. a frictional resistance member 26 to hold the position, obtain Preparations pressing mechanism 27 for forcibly lowering the guide rods 19 which are held in a position pushed up by the frictional resistance member 26. The gap adjusting rod 11 is connected to the base 10 so as to be inserted into the ring-shaped track groove 4 independently. In the ball arraying device, the push-out mechanism 12 inserts the balls 5 evenly by sequentially inserting them into the ring-shaped track grooves 4 while relatively moving the plurality of gap adjusting rods 11.

  The ball array device for bearings according to the present invention has a feature that balls can be efficiently and evenly arranged from a small bearing to a large bearing while shortening tact time. That is, the ball arranging device of the present invention inserts the gap adjusting rods into the ring-like raceway grooves of the non-arranged bearings set on the base separately and independently to arrange the balls evenly. Because. In particular, the ball arrangement device of the present invention inserts the ring-shaped track grooves evenly while relatively moving a plurality of gap adjusting rods, so that the balls are arranged evenly. It is not necessary to insert the gap adjusting rod to be inserted with a long stroke. This is because all the clearance adjustment rods can be moved in a stroke to make the balls have a predetermined interval, so that all the balls can be evenly arranged. In this state, the plurality of gap adjusting rods that can evenly arrange the balls have a short stroke to be pulled out from the gap adjusting rod, shortening the strokes of insertion and discharge, and can significantly shorten the time for reciprocating the gap adjusting rod. Thus, the ball arrangement apparatus of the present invention shortens the tact time by shortening the stroke of the gap adjusting rod. Therefore, the tact time can be shortened without increasing the speed at which the gap adjusting rod is reciprocated. For this reason, the ball | bowl arrangement | sequence apparatus of this invention can shorten a tact time, arrange | positioning a ball | bowl correctly and equally with a clearance adjustment rod. This is because the gap adjusting rod that moves at high speed does not change the position of the ball.

  Embodiments of the present invention will be described below with reference to the drawings. However, the embodiment shown below exemplifies a ball arrangement device for a bearing for embodying the technical idea of the present invention, and the present invention does not specify the ball arrangement device as follows.

  Further, in this specification, for easy understanding of the scope of claims, numbers corresponding to the members shown in the embodiments are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  The bearing ball arrangement apparatus shown in FIGS. 3 to 5 is a base 10 for setting an unaligned bearing 1 ′ in which a plurality of balls 5 are inserted in a ring-shaped raceway groove 4 between an inner ring 2 and an outer ring 3 in a fixed position. A plurality of gap adjusting rods 11 that are inserted into the ring-shaped raceway grooves 4 of the non-arranged bearings 1 ′ set on the base 10 and uniformly arrange the balls 5, and the plurality of gap adjusting rods 11 are sequentially ringed. An extrusion mechanism 12 for extruding the shaped track groove 4 is provided.

  The base 10 is fixed to the frame 13 and has a horizontal mounting surface 10A for mounting the unaligned bearing 1 'in a horizontal posture on the upper surface. In the illustrated base 10, the mounting surface 10 </ b> A is a horizontal plane, but the mounting surface can be inclined. In order to set the non-arranged bearing 1 ′ at a fixed position, the base 10 has a detachable shaft 14 protruding from the upper surface on the mounting surface 10 </ b> A. The detachable shaft 14 has an outer diameter substantially equal to the inner diameter of the inner ring 2 and is precisely slightly smaller than the inner diameter so that the inner ring 2 can be smoothly detached. The detachable shaft 14 protrudes perpendicularly to the mounting surface 10 </ b> A, and the inner ring 2 is inserted through the detachable shaft 14 to set the unaligned bearing 1 ′ at a fixed position of the base 10.

  In the illustrated ball arraying apparatus, the detachable shaft 14 is inserted through the through hole 10B of the base 10 so as to be movable in the axial direction. The detachable shaft 14 is connected to the actuator 15 at the lower end. The actuator 15 is a hydraulic cylinder or a servo motor, and moves the detachable shaft 14 up and down. With the actuator 15 projecting the detachable shaft 14 from the mounting surface 10 </ b> A, the unaligned bearing 1 ′ is set at a fixed position on the base 10. The unaligned bearing 1 ′ can be easily attached to and detached from the base 10 while the actuator 15 lowers the attaching / detaching shaft 14. The detachable shaft 14 is lowered by the actuator 15 to a position where it does not protrude from the mounting surface 10A, that is, to a position where the upper end is below the mounting surface 10A. The base 10 having the detachable shaft 14 that is moved up and down can efficiently and detach the unaligned bearing 1 ′. However, the apparatus of the present invention does not necessarily need to move the desorption shaft up and down. Further, in order to dispose the non-arranged bearing at a fixed position, it is not always necessary to provide a detachable shaft. For example, the outer ring can be held and set at a fixed position.

  Further, in the illustrated apparatus, a lateral pushing mechanism 16 that pushes the outer ring 3 in the radial direction is provided on the base 10. The lateral pushing mechanism 16 presses the outer ring 3 of the non-arranged bearing 1 ′ in the radial direction so that the ball 5 of the ring-shaped track groove 4 can move smoothly. Accordingly, the lateral pushing mechanism 16 pushes the outer ring 3 in a state in which the balls 5 are evenly dispersed from the justified state. The ball arraying device including the lateral pushing mechanism 16 can move the balls 5 smoothly, and can quickly make the balls 5 uniform while minimizing damage to the balls 5. The lateral pushing mechanism 16 pushes the outer ring 3 with a hydraulic cylinder or an air cylinder plunger 18 which is an actuator 17 fixed to the base 10. The lateral pushing mechanism 16 pushes the centering center P of the outer ring 3 in the radial direction. As shown in FIG. 6 (1), the centering center P is the center of a plurality of ball rows arranged in an arc shape in the ring-shaped raceway groove 4 in a state where the balls 5 are not dispersed.

  The plurality of gap adjusting rods 11 are inserted into the ring-shaped raceway grooves 4 of the non-arranged bearings 1 ′ so that all the balls 5 are evenly arranged. FIG. 6 shows a state in which the plurality of gap adjusting rods 11 are arranged in such a manner that the balls 5 that are arranged in the ring-shaped raceway groove 4 so as to be offset are evenly arranged. As shown in this figure, the gap adjusting rod 11 is inserted between adjacent balls 5, and the balls 5 are evenly arranged in the ring-shaped track grooves 4. The gap adjusting rod 11 is inserted between the balls 5 and specifies the interval between the adjacent balls 5. In other words, when the gap adjusting rod 11 is inserted between the balls 5, the distance between the balls 5 is forcibly increased. When the gap adjusting rod 11 is inserted between all the balls 5, all the balls 5 are evenly distributed to the ring-shaped track grooves 4. As shown in FIG. 6, the gap adjusting rod 11 is inserted between the balls 5 in order from the centering center P. The bearing 1 of FIG. 6 has an odd number of balls 5 in a ring-shaped raceway groove 4. In this apparatus, first, the two gap adjusting rods 11 are inserted into the ring-shaped track groove 4 and then the two gap adjusting rods 11 are inserted together into the ring-shaped track groove 4 so that the balls 5 are evenly distributed. Distribute. As shown in FIG. 7, first, one gap adjusting rod 11 is inserted into the ring-shaped track groove 4, and then the two gap adjusting rods 11 are pushed out into the ring-shaped track groove 4 to distribute the balls 5 evenly. You can also

  The clearance adjustment rod 11 is inserted into the ring-shaped raceway groove 4 of the non-arranged bearing 1 ′ to distribute the balls 5 evenly. Accordingly, the plurality of gap adjusting rods 11 are inserted into the ring-shaped track groove 4, so that the ring-shaped track grooves of the non-arranged bearing 1 ′ set on the base 10, more precisely, on the circumference of the base 10. 4 is arranged on the circumference along 4 and is connected to the base 10.

  In the ball arrangement apparatus shown in the figure, the gap adjusting rod 11 is connected to the guide rod 19. The guide rod 19 is connected in parallel to the gap adjusting rod 11 via the connecting arm 20. Both the guide rod 19 and the gap adjusting rod 11 are connected to the base 10 so as to be movable in the axial direction. In this ball arraying apparatus, the guide rod 19 is driven by the pushing mechanism 12 to insert the gap adjusting rod 11 into the ring-shaped track groove 4. The guide rod 19 is disposed outside the gap adjusting rod 11. In the ball arrangement apparatus of FIG. 5, a plurality of guide rods 19 are arranged concentrically. The gap adjusting rod 11 is also arranged on a concentric circle. The gap adjusting rod 11 is connected to a guide rod 19 located outside in the radial direction via a connecting arm 20. In this ball arranging device, the radius of the circle on which the guide rod 19 is arranged can be made larger than the radius of the circle on which the gap adjusting rod 11 is arranged. In particular, the connecting arm 20 can be lengthened to increase the radius of the circle in which the guide rod 19 is disposed, regardless of the radius of the circle in which the clearance adjustment rod 11 is disposed. This construction is advantageous for equalizing small bearing balls. This is because even if the gap adjusting rods 11 approach each other, the guide rods 19 can be arranged on a large circumference, so that the pushing mechanisms 12 of the respective guide rods 19 can be simplified.

  Further, the ball arraying device having this structure has a feature that the gap adjusting rod 11 can be moved to the outside of the ring-shaped track groove 4 by forcibly pushing down the upper end portion of the guide rod 19. In the bearing in which the balls 5 are evenly arranged, a cage is put in the ring-shaped raceway groove 4 or a spacer 6 is put in the ring-like raceway groove 4 so as to be transferred to the next process while holding the ball 5 in a fixed position. . At this time, it is necessary to move the gap adjusting rod 11 to the outside of the ring-shaped track groove 4. The ball arranging apparatus in which the guide rod 19 is connected to the gap adjusting rod 11 can move the gap adjusting rod 11 to the outside of the ring-shaped track groove 4 by forcibly driving the guide rod 19. That is, it is possible to move to the outside of the ring-shaped track groove 4 without pushing the gap adjusting rod 11. As shown in FIG. 8, the gap adjusting rod 11 has an inclined surface 11 </ b> A as shown in FIG. 8 so that it can be smoothly inserted between the balls 5. It is difficult to drive the inclined surface 11A so as to move efficiently in the axial direction. In addition, since the gap adjusting rod 11 is inserted between the balls 5, if it is pressed and discharged to the outside from the ring-shaped track groove 4, this may cause damage to the balls 5. Become. An apparatus capable of pressing the guide rod 19 and discharging the clearance adjusting rod 11 to the outside of the ring-shaped track groove 4 without pressing the clearance adjusting rod 11 damages the clearance adjusting rod 11 and scratches the ball 5. In addition, the gap adjusting rod 11 can be moved in the axial direction smoothly and efficiently by the guide rod 19.

  The plurality of gap adjusting rods 11 and guide rods 19 are arranged on both sides of a center line M passing through the center P of the offset center P and the center Q of the non-aligned bearing 1 ′, in other words, the center offset center P and the center Q of the detachable shaft 14. Arranged in line symmetry. A pair of guide rods 19 arranged symmetrically on both sides of the center line M are connected to each other by a connecting base 21. The pair of guide rods 19 connected by the connecting base 21 are pushed up together by the push-out mechanism 12, and the balls 5 are evenly arranged in order from the centering center P as shown in FIGS. The ball arrangement device that connects and pushes the gap adjustment rods 11 on both sides of the center line M together can simplify the mechanism of the extrusion mechanism 12. Further, the balls 5 can be evenly dispersed in an ideal state. However, the gap adjusting rod 11 and the guide rod 19 arranged symmetrically on both sides of the center line M are not necessarily connected and driven together. For example, although not shown, a pair of gap adjusting rods are driven separately. You can also

  A connecting base 21 that connects the lower ends of the pair of guide rods 19 is connected to the frame 13 so as to move up and down. In the apparatus of FIG. 4, the connecting base 21 is arranged to be slidable inside the guide tube 22. The connection base 21 slides inside the guide tube 22 and moves up and down. Furthermore, the connecting base 21 shown in the figure has rollers 23 fixed at both ends so that it can be pushed up smoothly by the cam mechanism 24 of the extrusion mechanism 12.

  Further, in the illustrated apparatus, the middle of the guide rod 19 is passed through the intermediate holder 25. The intermediate cage 25 is fixed to the frame 13 and is provided with a through hole 25A that slides the guide rod 19 up and down to move in the axial direction. In this device, the guide rod 19 is slid in the through-hole 10C opened in the base 10 and the through-hole 25A in the intermediate cage 25 and moved up and down in the axial direction. The intermediate cage 25 is provided with a friction resistance material 26 that holds the guide rod 19 in the pushed-up position on the inner surface of the through hole 25A. The frictional resistance material 26 is an O-ring that is elastically pressed against the surface of the guide rod 19. The friction resistance material 26 of the O-ring elastically presses the surface of the guide rod 19 and holds it in the pushed-up position when the guide rod 19 is not pushed up by the pushing mechanism 12. That is, the friction resistance material 26 prevents the guide rod 19 from falling naturally in a state where the guide rod 19 is not pushed up by the extrusion mechanism 12. The O-ring frictional resistance material 26 has a simple structure and excellent durability. However, the friction resistance material is not necessarily an O-ring. For example, although not shown, the friction resistance material can be elastically pressed by an elastic body such as a spring or a spring, a magnetic adsorption force, or a liquid pressure such as air pressure or hydraulic pressure.

  The guide rod 19 held at the raised position by the frictional resistance material 26 does not fall naturally. Therefore, when the gap adjusting rod 11 is moved to the outside of the ring-shaped track groove 4, the upper end of the guide rod 19 is forcibly pushed by the pressing mechanism 27 to be lowered. In this ball arrangement device, even if the pushing mechanism 12 does not push up the guide rod 19, the guide rod 19 and the gap adjusting rod 11 do not descend. For this reason, it is possible to move all the gap adjusting rods 11 together from the ring-shaped track groove 4 together by pushing down all the guide rods 19 in a state where the pushing mechanism 12 does not push up the guide rods 19. For this reason, all the gap adjusting rods 11 can be quickly moved to the outside of the ring-shaped track groove 4. Further, since the guide rod 19 is forcibly lowered and the gap adjusting rod 11 is moved to the outside of the ring-shaped track groove 4, the gap adjusting rod 11 can be reliably moved to the outside of the ring-shaped track groove 4.

  The extrusion mechanism 12 is a cam mechanism 24. The cam mechanism 24 includes a planar cam 28 that reciprocates. The cam mechanism 24 moves in the radial direction of the ring-shaped raceway groove 4, that is, moves in parallel with the center line M passing through the center Q of the non-arranged bearing 1 ′ and the offset center P, so that a plurality of gaps are formed. A flat cam 28 that sequentially pushes the adjustment rod 11 into the ring-shaped track groove 4 and an actuator of a drive mechanism 29 that reciprocates the flat cam 28 are provided. The actuator is a hydraulic cylinder. However, actuators can use all mechanisms that reciprocate, such as air cylinders and electric linear cylinders, instead of hydraulic cylinders.

  The flat cam 28 has a cam shape at the upper edge and is connected to a hydraulic cylinder of an actuator which is a drive mechanism 29 at the rear end. In the illustrated apparatus, two planar cams 28 are connected in parallel, and the rear end is connected to the actuator of the drive mechanism 29. The flat cam 28 is slid with its tip placed on the guide tube 22, and its rear end is connected to the frame 13 by the linear motion bearing 30 so as to move horizontally in a horizontal posture. The flat cams 28 are disposed below the rollers 23 provided on both sides of the coupling base 21. When the flat cam 28 moves forward, the connecting base 21 is pushed up via the roller 23 as shown in FIG. 9, the connecting base 21 pushes up the guide rod 19, and the guide rod 19 pushes up the gap adjusting rod 11 to cause the ring-shaped track groove 4. To insert.

  The two flat cams 28 have the same upper end cam shape. The cam shape of the upper edge is such that when the flat cam 28 is advanced, the guide rod 19 raises the gap adjusting rod 11 and the gap adjusting rod 11 in order from the centering center P as shown in FIGS. Is inserted into the ring-shaped raceway groove 4 so that the balls 5 are evenly dispersed. The illustrated planar cam 28 has an inclined rising surface 28A that is linearly inclined downward toward the tip, and an ascending horizontal surface 28B that holds the guide rod 19 in the ascending position. The inclination angle of the inclined rising surface 28 </ b> A determines the timing for pushing up the guide rod 19 and the gap adjusting rod 11 that are pushed up in order. The height of the rising horizontal plane 28B determines the rising stroke of the guide rod 19 and the gap adjusting rod 11. The gap adjusting rod 11 has an inclined surface 11A at the upper end. The flat cam 28 is designed to raise the gap adjusting rod 11 until the inclined surface 11A of the gap adjusting rod 11 protrudes from between the balls 5 and the distance between the balls 5 can be accurately specified. Further, the planar cam 28 is designed in such a shape that the balls 5 can be evenly arranged by inserting the gap adjusting rod 11 into the ring-shaped raceway groove 4 in order at a preferable timing.

  The unaligned bearing 1 ′ set on the base 10 has a ring-shaped raceway in a state where the balls 5 are equally offset on both sides of the center line M of the ring-like raceway groove 4 as shown in FIG. A gap adjusting rod 11 is inserted into the groove 4 to disperse the balls 5 evenly. The plurality of balls 5 placed in the ring-shaped raceway grooves 4 are caused to be justified on both sides of the center line M by the justification mechanism 31.

  FIG. 10 shows a schematic plan view of the shift mechanism 31. The side-shift mechanism 31 shown in this figure is disposed above the non-aligned bearing 1 ', and a pair of side-shift arms 32 for putting the pin 32A at the tip into the ring-shaped raceway groove 4 and for biasing the ball 5, and a pair And an actuator 33 that rotates the offset arms 32 in the horizontal plane in synchronization with each other at the same angle in opposite directions. The offset arm 32 rotates in the horizontal plane with the center Q of the non-aligned bearing 1 ′ as the rotation center. The offset arm 32 has a pin 32 </ b> A that extends downward at the tip and is guided by the ring-shaped track groove 4. The pin 32A is inserted into the ring-shaped raceway groove 4, and the pin 32A is moved on the arc along the ring-like raceway groove 4 so that the ball 5 is displaced. The balls 5 need to be evenly shifted to both sides of the center line M. Accordingly, the pair of displacing arms 32 rotate in the opposite direction in the horizontal plane at the same speed and at the same angle in synchronization with each other. The pair of one-sided arms 32 that rotate in this state connect the rotating shaft 34 with a gear 35 and rotate it to the same position in the opposite direction at the same speed. This one-sided mechanism 31 rotates a pair of one-sided arms 32 in opposite directions at the same speed by one actuator 33. However, the pair of one-sided arms can be rotated in the same manner in synchronization with each other by a servo motor that controls the rotation angle.

  The actuator 33 is a servo motor. However, all actuators that can rotate the shifting arm in a horizontal plane, such as an air or hydraulic cylinder whose output shaft rotates, or a mechanism that converts the reciprocating motion of the air or hydraulic cylinder into a rotational motion are also used as the actuator. it can.

  The actuator 33 moves the offset arm 32 from the start position indicated by the chain line in FIG. 10 to the offset position indicated by the solid line. At the start position, the pins 32A fixed to the tips of the pair of one-sided arms 32 approach each other so that the ball 5 does not enter between them. In this position, the pair of pins 32 </ b> A are disposed on both sides of the center line M, or are disposed at positions approaching the center line M. The justified position is a position where the justified arm 32 is rotated in the direction to justify the ball 5 so that all the balls 5 come into contact with each other and the justified arm 32 cannot be rotated.

  The illustrated shift mechanism 31 includes a position sensor 36 that detects the shift position of the shift arm 32. The position sensor 36 detects the position of the biasing arm 32 in a state where all the balls 5 are brought into contact with each other and are evenly shifted to both sides of the center line M. When a specific number of balls 5 are put in the ring-shaped raceway groove 4, the one-sided position of the one-sided arm 32 becomes a predetermined position. However, if the number of balls 5 put in the ring-shaped raceway groove 4 is less than or greater than the specific number, the offset position deviates from the specific position. A deviation from the specific position is detected by the position sensor 36. The position sensor 36 outputs an error signal indicating that the number of balls 5 to be supplied is incorrect when it detects that the one-sided position of the one-sided arm 32 is not a specific position. The side shifting mechanism 31 can count whether or not the number of the balls 5 is an accurate number while the balls 5 are being shifted.

  Although not shown in the drawing, the side-shift mechanism 31 is arranged above the base 10 so that the side-shift arm 32 can be moved up and down, or has a structure in which a pin can be extended and contracted. This is because, after the pin 32A moves along the ring-shaped track groove 4 and moves the ball 5 to one side, the pin 32A is moved to the outside of the ring-shaped track groove 4. With the pins 32 </ b> A moving to the outside of the ring-shaped track grooves 4, the ball arranging device arranges the balls 5 evenly. The up-and-down shifting mechanism 31 lowers the shifting arm 32 to guide the pin 32 </ b> A into the ring-shaped track groove 4. In this state, the ball 5 is moved away. Thereafter, the one-sided arm 32 is raised to move the pin 32 </ b> A to the outside of the ring-shaped track groove 4. The side-shift mechanism for expanding and contracting the pins extends the pins into the ring-shaped track grooves, and contracts the pins to move them outside the ring-shaped track grooves.

  The above-described side-alignment mechanism 31 moves the pin 32A along the ring-shaped raceway groove 4 on the circumference, so that the ball 5 can be reliably aligned. However, the present invention does not specify a biasing mechanism. For example, the unaligned bearing can be set on the base in a slightly inclined posture, and the ball can be biased by rolling it to both sides of the center line by gravity. .

The above ball arraying device distributes the balls 5 of the unaligned bearing 1 ′ evenly by the ring-shaped track grooves 4 in the following steps.
(1) An unaligned bearing 1 ′ in which a predetermined number of balls 5 are placed in a ring-shaped raceway groove 4 between the outer ring 3 and the inner ring 2 is set at a fixed position on the base 10. The unaligned bearing 1 ′ is set on the base 10 with the detachable shaft 14 placed in the inner ring 2. Thereafter, after the ball 5 is justified by the justifying mechanism 31, the outer ring 3 is pressed in the direction of the center line M by the lateral pushing mechanism 16 and fixed to the base 10. In this step, the extrusion mechanism 12 does not raise the gap adjustment rod 11. All the gap adjusting rods 11 are lowered and arranged outside the ring-shaped raceway groove 4.
(2) The flat cam 28 of the pushing mechanism 12 is advanced by the cylinder of the actuator 29. The flat cam 28 first raises the gap adjusting rod 11 that is closest to the centering center P, and then raises the gap adjusting rod 11 one after another. The ascending gap adjusting rod 11 is guided by the ring-shaped raceway groove 4 of the non-arranged bearing 1 ′, and as shown in FIG. 6 and FIG. To disperse.
(3) When the balls 5 are evenly dispersed, the spacers 6 are inserted between the balls 5 and the bearings 1 are transferred to the next step while maintaining the ball interval with the spacers 6. Further, a cage can be inserted between the balls 5 to hold the balls 5 in a fixed position. When the spacer 6 or the cage is inserted, the push-down mechanism 27 pushes down the guide rod 19 and moves the gap adjusting rod 11 to the outside of the ring-shaped track groove 4.

It is a schematic perspective view of the comb used for the conventional ball | bowl arrangement | sequence apparatus. It is an exploded sectional view showing an example of other conventional ball arrangement devices. 1 is a schematic configuration diagram of a ball arranging device according to an embodiment of the present invention. It is a partial cross section side view of the ball arrangement device concerning one example of the present invention. It is a top view which shows the positional relationship of the extrusion mechanism, guide rod, and clearance gap adjustment rod of the ball | bowl arrangement | sequence apparatus shown in FIG. It is a figure which shows the state which inserts a clearance adjustment rod in the ring-shaped track groove of a non-arrangement bearing, and arranges a ball equally. It is a figure which shows another example which inserts a clearance adjustment rod in the ring-shaped track groove of a non-arranged bearing, and arranges a ball equally. It is an expansion perspective view which shows an example of the front-end | tip shape of a clearance gap adjustment rod. It is a perspective view which shows an example of an extrusion mechanism. It is a schematic plan view which shows an example of the one-sided mechanism. FIG. 11 is a schematic side view of the shift mechanism shown in FIG. 10.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Bearing 1 '... Unarranged bearing 2 ... Inner ring 3 ... Outer ring 4 ... Ring-shaped raceway groove 5 ... Ball 6 ... Spacer 10 ... Base 10A ... Mounting surface 10B ... Through-hole
DESCRIPTION OF SYMBOLS 10C ... Through-hole 11 ... Gap adjustment rod 11A ... Inclined surface 12 ... Extrusion mechanism 13 ... Frame 14 ... Desorption shaft 15 ... Actuator 16 ... Side pushing mechanism 17 ... Actuator 18 ... Plunger 19 ... Guide rod 20 ... Connection arm 21 ... Connection Table 22 ... Guide cylinder 23 ... Roller 24 ... Cam mechanism 25 ... Intermediate cage 25A ... Through hole 26 ... Friction resistance material 27 ... Pushing mechanism 28 ... Plane cam 28A ... Inclined rising surface 28B ... Rising horizontal plane 29 ... Drive mechanism 30 ... Direct Dynamic bearing 31... Alignment mechanism 32... Alignment arm 32 A... Pin 33... Actuator 34... Rotating shaft 35 ... Gear 36 ... Position sensor 40 ... Comb 41 ... Gap adjustment rod 44 ... Ring-shaped track groove 45 ... Ball 51. ... Inner ring 52A ... Shaft hole 54 ... Ring-shaped raceway groove 55 ... Shaft 55A Spiral stepped portion 56 ... guide ring 57 ... swing claw

Claims (5)

A base (10) for setting an unaligned bearing (1 ') containing a plurality of balls (5) in a ring-shaped raceway groove (4) provided between the inner ring (2) and the outer ring (3) at a fixed position. And connected to the circumference of the base (10) so as to move in the axial direction to the ring-shaped raceway groove (4) of the non-arranged bearing (1 ′) set on the base (10), and Multiple clearance adjustment rods (11) that are inserted into the ring-shaped raceway groove (4) of the array bearing (1 ') and uniformly arrange the balls (5) of the ring-like raceway groove (4), and multiple clearance adjustments It has an extrusion mechanism (12) that pushes the rod (11) into the ring-shaped raceway groove (4) in order,
The pushing mechanism (12) is moved in the radial direction of the ring-shaped track groove (4), and a planar cam (28) for inserting a plurality of gap adjusting rods (11) into the ring-shaped track groove (4) in order. A cam mechanism (24) comprising a drive mechanism (29) for moving the planar cam (28) in the radial direction,
The unaligned bearing (1 ′) is mounted on the upper surface of the base (10), the gap adjusting rod (11) is pushed up and inserted into the ring-shaped raceway groove (4),
The gap adjusting rod (11) is connected to the base (10) so as to be inserted into the ring-shaped raceway groove (4) separately and independently, and the pushing mechanism (12) has a plurality of gap adjusting rods ( 11) A ball arrangement device for bearings, in which the balls (5) are arranged evenly by sequentially inserting them into the ring-shaped raceway grooves (4) while relatively moving them. A pair of gap adjustment rods (11) arranged at a position orthogonal to the moving direction of the plane cam (28) are connected to each other, and the pair of connected gap adjustment rods (11) are joined together by the plane cam (28). The ball arrangement device for bearings according to claim 1 , wherein the ball arrangement device is moved up and down.   The guide rod (19) is connected to the clearance adjustment rod (11), and the clearance adjustment rod (11) and the guide rod (19) are connected in parallel so that they can move in the axial direction to the base (10). The ball of the bearing according to claim 1, wherein the ball is connected, and the guide rod (19) is driven by the pushing mechanism (12) so that the gap adjusting rod (11) is inserted into the ring-shaped raceway groove (4). Array device. Place the guide rod (19) outside the clearance adjustment rod (11) and connect both the guide rod (19) and clearance adjustment rod (11) to the base (10) so that they can move in the axial direction. 4. A ball array device for a bearing according to claim 3 . A base (10) for setting an unaligned bearing (1 ') containing a plurality of balls (5) in a ring-shaped raceway groove (4) provided between the inner ring (2) and the outer ring (3) at a fixed position. And connected to the circumference of the base (10) so as to move in the axial direction to the ring-shaped raceway groove (4) of the non-arranged bearing (1 ′) set on the base (10), and Multiple clearance adjustment rods (11) that are inserted into the ring-shaped raceway groove (4) of the array bearing (1 ') and uniformly arrange the balls (5) of the ring-like raceway groove (4), and multiple clearance adjustments It has an extrusion mechanism (12) that pushes the rod (11) into the ring-shaped raceway groove (4) in order,
The unaligned bearing (1 ′) is mounted on the upper surface of the base (10), and the gap adjusting rod (11) is pushed up and configured to be inserted into the ring-shaped track groove (4),
Further, a guide rod (19) is connected to the gap adjusting rod (11), and the guide rod (19) which is elastically pressed on the surface of the guide rod (19) and cannot be pushed up by the pushing mechanism (12). ) Is held in the push-up position with frictional resistance, and a push-down mechanism (27) for forcibly lowering the guide rod (19) held in the push-up position with this frictional resistance material (26). ,
The gap adjusting rod (11) is connected to the base (10) so as to be inserted into the ring-shaped raceway groove (4) separately and independently, and the pushing mechanism (12) has a plurality of gap adjusting rods. A ball array device for bearings in which the balls (5) are arranged evenly by sequentially inserting them into the ring-shaped raceway grooves (4) while relatively moving (11).

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