JP2618482B2 - Rolling bearing lubrication system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a lubricating device for a rolling bearing, and more particularly, to a lubricating device for supplying lubricating oil to a rolling bearing rotating at high speed.

(Prior Art) In general, a rolling bearing incorporated as a main part of various types of rotating equipment is composed of a plurality of rolling elements including balls, rollers, and the like, and a track ring that supports these rolling elements. To exert its function, it is necessary and indispensable to supply a reliable lubricant. In particular, when such a rolling bearing is incorporated in a high-speed rotating device and rotates at high speed, it is necessary to cool the rolling bearing itself, and therefore, a liquid lubricating oil having a large cooling effect is widely used as a lubricant. ing.

In this type of conventional rolling bearing, as a lubrication method, a dropping type, a splash type, oil mist lubrication, jet lubrication, oil-air lubrication and the like are known.
In the above-mentioned dripping type, lubricating oil is supplied to the bearing using gravity by an oil cup or the like, or in the splash type, the lubricating oil is supplied into the housing using the rotation of a rotating body supported by the bearing. The lubricating oil stored is splashed up to achieve the purpose of lubrication. On the other hand, oil mist lubrication and jet lubrication both pressurize the lubricating oil with a pressurized pump and spray the lubricating oil from the nozzle to the bearing as a mist or jet stream. Is supplied to the bearing together with air. In each case, the necessary parts of the bearing are intensively lubricated by a separately provided pressurizing source such as a pump or a compressor. The effect is extremely large.

(Problems to be Solved by the Invention) However, in such a conventional rolling bearing, since the rolling element simply rolls in the raceway, and no devising is made inside the bearing, lubrication is not performed. When oil is supplied to a high-speed rotating rolling bearing by the above-mentioned dropping or splashing lubrication method, there has been a problem that overheating and seizure are likely to occur. That is, since the lubricating oil supplied to the rolling bearing by the above-described lubricating method has low energy of itself, it is sputtered with air toward the raceway by centrifugal force based on the high speed rotation of the rolling element, Along with the rolling elements, a kind of wake flows away from the contact with the rolling elements, causing no lubricating oil to be introduced into the critical contacts that require lubrication.
In the worst case, seizure often occurred.

On the other hand, in the case of oil mist lubrication, jet lubrication, or oil-air lubrication, high-pressure lubricating oil is intensively supplied, so that even if the accompanying flow described above occurs, the bearing is lubricated accurately. be able to. However, pressurizing equipment such as pressurizing pumps and compressors or equipment for collecting and circulating lubricating oil are required separately, which increases equipment costs and running costs and complicates equipment maintenance. there were. In particular, in the lubrication of a rolling bearing that supports a rotating body provided on a rotating table, a rotating joint having a complicated structure is required between the pressurizing source and the table, and the above-mentioned disadvantages are further doubled. The result was inviting.

(Object of the Invention) The present invention has been made in view of the above-mentioned problems of the prior art, and is simple, without the need for a pressurizing source, regardless of the generation of the accompanying flow of lubricating oil and air accompanying high-speed rotation. With a structure, lubricating oil is reliably introduced between the rolling element and the bearing ring to provide a lubricating device for a rolling bearing that is free from overheating and seizure, has low equipment costs and running costs, and is easy to maintain. It is intended to be.

(Means for Solving the Problems) In order to achieve the above object, a lubricating device for a rolling bearing according to the present invention comprises: a rotating body rotatably provided so that an axial direction is substantially perpendicular to a vertical direction; A drive shaft having an axis extending in the axial direction of the body and rotating intermittently or at a predetermined rotation speed with respect to the rotating body, and a rolling bearing for supporting the drive shaft, wherein the rolling bearing includes: A pair of races, which are coaxially provided and have raceways facing each other in the radial direction and one of which rotates together with the drive shaft, and a contact which is disposed between the pair of races and contacts the raceways, respectively. A rolling element having a plurality of rolling elements, the lubricating oil being supplied from an axially outer end of the raceway, wherein the rotating body stores a certain amount of lubricating oil therein. Storage formed to A liquid chamber, and one or more lubricating oil reservoirs having a receiving port protruding from an inner wall surface of the liquid storage chamber so that lubricating oil in the liquid storage chamber is pumped up with the rotation of the rotating body, The rolling bearing has a guide groove formed spirally from one end along the raceway surface to the vicinity of the contact portion of the rolling element, on the rotating raceway ring of the pair of raceways, An annular body formed so as to cover and stationary with respect to the rotating bearing ring, and one end of a supply hole formed in the annular body communicates with the lubricating oil reservoir and the other end thereof. An opening is provided near one end of the introduction groove, and both ends of the supply hole are disposed so as to be vertically separated from each other.

(Function) In the present invention, a spiral introduction groove is formed in the raceway ring on the rotation side, and a lubricating oil introduction portion is formed between the stationary ring and the annular body covering the opening end of the introduction groove. The lubricating oil is introduced between the rolling element and the bearing ring at high speed and in a splash while being pressurized by the high-speed rotation of the bearing ring. For this reason, regardless of the accompanying flow of lubricating oil and air generated with the high-speed rotation of the rolling bearing, the lubricating oil is reliably supplied between the rolling element and the race without a pressurizing source, and the rolling bearing is overheated and burned. Sticking is prevented. Further, since a pressurizing source of lubricating oil is not required, facility costs and running costs are reduced, and facility maintenance is facilitated.

Hereinafter, the present invention will be described with reference to the drawings.

1 to 4 are views showing a first embodiment of a lubricating device for a rolling bearing according to the present invention. The present embodiment shows a case where the lubricating device for a rolling bearing according to the present invention is applied as a lubricating device for a bearing of a bobbin holder in a turret type automatic switching winding machine. First, the configuration of the application device will be described. 1 is a schematic front view of the above-described winder, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a sectional view taken along the line III-III of FIG. It is arrow sectional drawing.

In FIG. 1, reference numeral 1 denotes the above-described turret-type automatic switching winder. The turret-type automatic switching winder 1 includes a traverse device 3, a slide block 4, and a slide provided on a frame 2 sequentially from the top in the figure. A pair of bobbin holders 8 and 9 holding the contact roller 5 and the bobbins 6 and 7 protruding from the block 4, respectively, and the bobbin holders 8 and 9
Is provided with a circular table 10 protruded rotatably. The yarn Y wound by the turret type automatic switching winder 1 passes through a separately provided snail guide 11 serving as a traversing fulcrum, and is guided by the contact roller 5 to the bobbin holder 8 by the traverse device 3. It is traversed in the axial direction, and is further wound around the bobbin 6 of the bobbin holder 8 that rotates. Although not shown, the slide block 4 is provided so as to be able to move up and down on the frame 2 by a slider shaft, and the contact roller 5 protruding from the slide block 4 moves the guide position of the yarn Y in the vertical direction. You can move to. When the yarn Y is wound up on the bobbin 6 of one bobbin holder 8 and becomes full, the table 10 is rotated and the winding of the yarn Y is automatically switched to the bobbin 7 of the other bobbin holder 9, The yarn Y is continuously wound by the turret type automatic switching winder 1.

In FIG. 2, the table 10 is rotatably supported on the frame 2 via a bearing 12, and is fixed by a pin (not shown) while the bobbin 6 is being wound. Then, when the bobbin 6 is fully loaded, the pin is pulled out. The table 10 can be rotated.
Then, the table 10 is driven and rotated by a drive device (not shown), and automatically switches the full bobbin 6 to the standby bobbin 7 as described above in FIG. The bearing 12 is a pair of ring-shaped members fixed to the frame 2 by bolts 13.
It has an outer ring 15 composed of 14a and 14b and a plurality of rollers 16 whose inside is supported by an inner ring 10a formed on the table 10, and the rollers 16 are supported by the outer ring 15 and the inner ring 10a, respectively. On the other hand, in FIG.
Is an outer cylinder part 17 for gripping the axially divided bobbin 6, a drive shaft 18 having one end on the left side in the figure connected to the outer cylinder part 17, an outer cylinder part
17 and fixed to and supported by the table 10, and further fixed to the table 10 by bolts 20 and an inner cylindrical portion 19 (rotating body) through which the drive shaft 18 passes, and the output shaft 22 a is driven via the coupling 21. Drive motor 22 connected to the other end of shaft 18
It consists of. The outer cylindrical portion 17 has a holder 23 including a cylindrical portion 23a and a boss 23b integrally formed inside the cylindrical portion 23a, and the drive shaft 1 is coaxial with the boss 23b of the holder 23.
One end of 8 is penetrated and fastened by a nut 24.
Ring-shaped elastic members 25a to 25d are sequentially fitted in the axial direction on the outer periphery of the cylindrical portion 23a of the holder 23, and these elastic members 25a
The sleeves 26a to 26d are slidably mounted alternately with the sleeves 26d to 25d. Further, the sleeve 26d located at the right end of the cylindrical portion 23a of the holder 23 is fixed in the axial direction by a protrusion 23c formed by projecting radially outward from the cylindrical portion 23a. Reference numeral 27 denotes a cap provided on the left end of the holder 23, and a ring portion 27a of the cap 27 is fitted to the cylindrical portion 23a and is in contact with an elastic member 25a located at the left end. The cap 27 is fixed to the left end of a rod 29 penetrating by a nut 28, and the right end of the rod 29 is a cylinder formed on the holder 23.
It is connected to a piston 30 slidably fitted to 23d. Then, a spring 32 is interposed between the piston 30 and the retainer 31 screwed and inserted into the left end of the cylindrical portion 23a,
The cap 27 urged by the spring 32 is a ring part.
Elastic members 25a to 25d and sleeves 26a to 26d via 27a
Are sequentially pressed against the projections 23c of the holder 23, and the elastic members 25a to 25d are deformed in accordance with this, and are projected outward to grip the bobbin 6 from inside. When the outer cylinder 17 is driven by the drive motor 22 via the drive shaft 18, the bobbin 6 gripped by the elastic members 25a to 25d is
17 and the yarn Y can be wound in FIG. 1 as described above.

On the other hand, the inner cylindrical portion 19 of the bobbin holder 8 fits into the holder 23, and has a base end supported on the table 10 by bolts 33 and fixed to the cylindrical supporter 34, and fitted to the front end and the base end of the supporter 34. A pair of bearing housings 35 and 36 fixed in the circumferential direction and inserted into the supporter 34, and are interposed between the bearing housings 35 and 36 and a fixing ring 37 at the distal end of the supporter 34 and a step portion on the base end side. Cylindrical spacer 3 that fixes bearing housings 35 and 36 in the axial direction together with 34a
8. A pair of bearings that are held by bearing housings 35 and 36, respectively, and rotatably support the drive shaft 18 on the supporter 34.
A pair of oil reservoirs 41 and 42 (lubricating oil reservoirs) shown in FIG. 3 are formed at positions symmetrical to the center axis of the bobbin holder 8 so as to protrude from the inner periphery of the spacers 39 and 40 and the spacer 38. further,
A liquid storage chamber 43 is provided in the supporter 34, and the storage chamber 43 is provided.
Are bearing housings 35, 36, bearing housing 3 sealed in the supporter 34 by O-rings 44, 45.
Bearings 39, 40 and spacer 3 held in 5, 36, respectively
8, a predetermined amount of lubricating oil is always stored in the liquid storage chamber 43. In FIG. 1, when the yarn Y is fully wound on the bobbin 6, the bobbin holder 8 is set on the table.
By rotation of 10, the bobbin holder 9 on which the empty bobbin 7 is mounted is replaced. Next, after the full bobbin 6 is removed from the bobbin holder 8, a new empty bobbin 6 is newly attached, and the bobbin holder 9 of the full bobbin 7 is replaced, and the table 10 makes one rotation. The bobbin holder 8 returns to the winding position of the yarn Y again. During this time,
As shown in FIG. 3, one oil reservoir 41 is in a state where lubricating oil in a liquid storage chamber 43 is pumped and stored, and the other oil reservoir is
Reference numeral 42 indicates a state in which the lubricating oil is discharged with the receiving port facing downward. In the present embodiment, the predetermined amount of the lubricating oil stored in the storage chamber 43 is set to be slightly larger than the sum of the capacities of the oil reservoirs 41 and 42.

Here, based on FIG. 4, lubrication of one of the bearings 39, 40 of the bearings 39, 40 incorporated in the bobbin holder 8 of the turret type automatic switching winding machine 1 in FIG. 2 as a lubricating device for a rolling bearing according to the present invention. The configuration of the device will be described. FIG. 4 is an enlarged view of a portion A in FIG.

In FIG. 4, reference numerals 51a and 52a denote drive shafts, respectively.
An inner ring and an outer ring as a pair of races provided coaxially with respect to the 18 axes. The inner race 51a and the outer race 52a have raceways 53a, 54a radially opposed to each other. Inner ring 51a
In this embodiment, one of the outer ring 52a and the inner ring 51a is fitted to and fixed to the driving wheel 18 and rotates together with the driving wheel 18, while the other outer ring 52a is
Is inserted and fixed. A plurality of balls 55a as rolling elements are coaxially disposed at equal intervals via a retainer 56a between the inner ring 51a and the outer ring 52a, and are respectively provided with raceway surfaces 53a, 54a.
And contact portions 57a and 58a that contact with the contact portions.

On the other hand, the bearing housing 35 has an outer ring 52 in the axial direction.
a first supply hole 59a formed outside of the first supply hole, one end of the first supply hole 59a
A second supply hole 60a radially drilled in communication with 59a and one end thereof communicates with the other end of the second supply hole 60a, and the other end thereof forms an inner race 51a.
A lubricating oil supply hole 63a formed of a third supply hole 62a which is formed in a nozzle shape and is inclined and opened near the axially outer end 61a of the lubricating oil.
Is provided. Then, in FIG. 2, the oil sump 41
One end of the oil reservoir 41 on the side of the bearing housing 35
A pipe 64a is provided at the bottom of the pipe. Pipe 6
The other end of 4a is inserted into the first supply hole 59a of the supply hole 63a, and the lubricating oil stored in the oil reservoir 41 is supplied to the supply hole 63a in FIG.
a, and is dropped near the outer end 61a of the inner ring 51a through the bearing 39.
, Lubricating oil is supplied from the outer end 61a of the inner ring 51a. It should be noted that the bearing is passed through the pipe 64a and the supply hole 63a.
As shown in FIG. 2, the supply amount of the lubricating oil in the oil reservoir 41 supplied to the 39 is determined by the opening ratio of the flow rate adjusting member 65a, which is inserted into the inlet of the pipe 64a and formed of, for example, a sintered metal or the like. It is set and adjusted as appropriate.

In FIG. 4, the inner race 51a on the rotating side of the inner race 51a and the outer race 52a is formed with a spiral introduction groove 66a extending from the outer end 61a to the vicinity of the contact portion 57a of the ball 55a along the raceway surface 53a. The introduction groove 66a has an open end 67 that opens to the raceway surface 53a.
have a. The introduction groove 66a is formed in a right-hand thread when the drive shaft 18 rotates counterclockwise when viewed from the direction of the arrow B in FIG. 2, and passes through the supply hole 63a with the rotation of the inner ring 51a. The supplied lubricating oil is configured to move toward the ball 55a. Further, reference numeral 68a denotes an annular body provided in the bearing housing 35 and covering the entire open end 67a of the introduction groove 66a while maintaining a small gap, and the annular body 68a protrudes between the inner 51a and the outer ring 52a. The outer end 61a side of the opening end 67a of the introduction groove 66a is covered, and a third
The first annular body 69a whose other end of the supply hole 62a is open and the base end are fixed to the protruding end of the first annular body 69a, and the tip is close to the ball 55a and the open end 67a of the introduction groove 66a is brought into contact with the ball 55a. Part 57a
And a second annular body 70a covering up to the vicinity of. And, between the introduction groove 66a and the annular body 68a, a lubricating oil introduction portion 71 is provided.
a is formed, and the lubricating oil in the oil reservoir 41 is supplied to the outer end 61a side of the inner race 51a through the supply hole 63a to the introduction portion 71a as described above. On the other hand, since the annular body 68a is formed integrally with the bearing housing 35 and is provided stationary with respect to the rotating inner ring 51a, when the inner ring 51a rotates together with the drive shaft 18, the introduction groove formed in the annular body 68a. The introduction portion 71a moves toward the ball 55a from the outer end 61a side of the inner ring 51a while pressurizing the supplied lubricating oil by the screw action of 66a,
It is introduced between the contact portion 57a of the ball 55a and the raceway surface 53a of the inner ring 51a. In the description of the above configuration, the bearings 39, 40 incorporated in the bobbin holder 8 in FIG.
The lubricating device for one of the bearings 39 has been described, but the lubricating device for the other bearing 40 has a bearing housing.
Since it has a symmetrical and completely similar structure with respect to a symmetry plane YY passing through the center of the spacer 38 in the axial direction, including the pipe 36b of the oil sump 41 and the oil reservoir 41, the same subscript a in FIG. And the detailed description is omitted. Further, the configuration of the pipes 64a and 64b provided in one of the oil reservoirs 41 and 42 shown in FIG. 3 has been described, but the other oil reservoir 42 has the same configuration as these. Pipes 64c and 64d are provided. And
The first and second supply holes 59a and 59b of the supply holes 63a and 63b are respectively provided symmetrically with respect to the center axis of the drive shaft 18 in the bearing housing 35.
And the first supply holes 59c of the supply holes 63c and 63d formed in 36.
The pipes 64c and 64d described above are inserted into the bearings 59 and 59d, so that the lubricating oil in the oil reservoir 42 is supplied to the bearings 39 and 40. Further, for convenience of explanation, the configuration of one bobbin holder 8 of the pair of bobbin holders 8 and 9 has been described. However, it goes without saying that the other bobbin holder 9 has the same configuration as the bobbin holder 8. Further, the oil reservoir 42 of the bobbin holder 9 at the standby position in FIG.
Although the lubricating oil pumped from 43 is stored, the drive shaft 18 does not rotate while the upper bobbin holder 8 is being wound in principle, so the supply holes 63a, 63b or 63 in FIG.
The lubricating oil supplied through c and 63d overflows from the receiving portions 72a and 72b, through the through holes 73a and 73b formed in the bearing housings 35 and 36, or through the bearings 39 and 40 and the liquid storage chamber 43.
Is to be discharged.

 Next, the operation will be described.

In FIG. 2, the bobbin holder 8 in which the bobbin 6 is fitted and gripped on the outer cylindrical part 17 is attached to the bobbin holder 9 in the lower part of FIG.
Then, the table 10 is moved upward by the rotation of the table 10 from the standby position shown in FIG. 4, the table 10 is fixed to a pin (not shown), and the bobbin holder 8 is fixed to the winding position. At the same time, as shown in FIG. 3, lubricating oil in the storage chamber 43 is pumped into the oil reservoir 41, and supply holes 63a formed in the bearing housings 35 and 36 through pipes 64a and 64b in FIG. Oil reservoir 4 in first supply hole 59a and first supply hole 59b of
1 lubricating oil is supplied. At the same time as the supply of the lubricating oil to the oil reservoir 41, the drive motor 22 in FIG. 2 is driven, and the bobbin 6 rotates together with the outer cylinder portion 17 of the bobbin holder 8 by the drive shaft 18 that rotates together with the drive motor 22. And the first
In the figure, a yarn that passes through a snail guide 11, is guided by a contact roller 5, and is traversed in the axial direction of a bobbin 6 by a traverse device 3, is wound around the bobbin 6, and is a yarn of a turret type automatic switching winder 1. The winding operation of Y is performed. Hereinafter, for the sake of convenience, the operation will be described based on one of the bearing housing 35 and the bearing 39 shown in FIG.
As described above, the lubricating oil in the oil reservoir 41 supplied to the first supply hole 59a is supplied to the introduction portion 71a formed between the introduction groove 66a and the annular body 68a through the second supply hole 60a and the third supply hole 62a. Inner ring 5
It is dropped and supplied to the outer end 61a side of 1a. Next, drive shaft 1
Due to the screw action of the introduction groove 66a generated on the annular body 68a by the inner ring 51a rotating at high speed together with 8, the lubricating oil of the introduction portion 71a moves toward the ball 55a at a high speed while being pressurized, and is described in detail in the conventional example. Through the accompanying flow of the lubricating oil and air generated with the rotation of the ball 55a described above, it is introduced in a state of being sprayed between the contact portion 57a of the ball 55a and the raceway surface 53a of the inner ring 51a. Therefore, a bearing 39 that supports the drive shaft 18 is provided.
During the winding of the yarn Y, that is, during the operation of the bobbin holder 8, the lubricating oil is always accurately supplied to necessary portions, and the overheating and seizure of the bearing 39 are prevented irrespective of the occurrence of the entrainment flow described above. You. Although the description is omitted, it goes without saying that the same operation is performed for the symmetrically provided bearings 40.

1 and 2, when the rotation of the bobbin holder 8 reaches a predetermined number of rotations and the yarn Y wound on the bobbin 6 is in a full winding state, the drive motor 22 stops, and then Then, the pin (not shown) is pulled out, the table 10 rotates, and the bobbin holder 8 moves to the lower standby position. At the same time, the bobbin holder 9 at the standby position is
At the same time, the bobbin holders 8 and 9 are fixed to the above-described positions by fixing the pins when the table 10 is stopped, and the yarn Y is wound again by the rotation of the bobbin holder 9. Be started. At this time, needless to say, the same lubrication is performed on the bobbin holder 9 as well. In FIG. 3, when the table 10 starts rotating, the lubricating oil remaining in the oil reservoir 41 is discharged to the liquid storage chamber 43. Next, the liquid storage chamber is
When the lubricating oil in 43 is scooped and pumped into oil sump 42 and bobbin holder 8 fixed at the standby position below rotates bobbin 6 or rotates as necessary, oil sump 42
, Lubricating oil is supplied to the bearings 39 and 40 through the pipes 64c and 64d, and the bearings 39 and 40 are similarly lubricated properly. Further, when the bobbin holder 8 is stopped, as shown in FIG. 2, the lubricating oil supplied to the bearings 39, 40 overflows and passes from the receiving portions 72a, 72b through the through holes 73a, 73b or the bearings 39, 40. It is discharged to the liquid storage chamber 43.

Thus, in the present embodiment, the inner ring 51 on the rotating side
a, 51b are formed with spiral introduction grooves 66a, 66b, and the stationary body is stationary and covers the opening ends 67a, 67b of the introduction grooves 66a, 66b.
a, 68b to form introduction portions 71a, 71b, and inner rings 51a, 51b
The lubricating oil supplied by the high-speed rotation is introduced between the balls 55a, 55b and the inner races 51a, 51b in a high-speed and splash form while pressurizing. Therefore, regardless of the accompanying flow of the lubricating oil and air generated by the high-speed rotation of the bearings 39 and 40, the lubricating oil is reliably supplied to the balls 55a and 55b and the inner ring 51 with a simple structure without a pressurizing source.
It can be supplied between a and 51b. As a result, bearing 3
9 and 40 can be prevented from overheating and seizure, and because of their simple structure, equipment costs and running costs can be reduced, and their maintenance can be facilitated.

In this embodiment, the case where the rolling element of the rolling bearing is constituted by a ball has been described. However, the present invention is not limited to this, and the rolling element may be constituted by a roller, a tapered roller, or a needle. In addition, although the introduction groove is formed in the inner race, another member having the introduction groove may be integrally formed with the bearing. Furthermore, although the introduction groove is formed in one of the inner ring and the outer ring, when the outer ring rotates, it is needless to say that the introduction groove is formed in the other rotating outer ring. Further, in this embodiment, the bobbin holder bearing is provided in the supporter projecting from the table, but the bearing may be provided in the table. Further, in this embodiment, the lubricating device for the bearing mounted on the bobbin holder of the winding machine has been described. However, the present invention is not limited to this, and is also applicable to a lubricating device for a bearing mounted on a motor or other rotating device. It is possible.

FIG. 5 shows a second embodiment of a rolling bearing lubrication system according to the present invention.
FIG. 8 is a view showing an embodiment. In the present embodiment, a spiral discharge groove 81a is formed so as to sandwich a ball 55a on a raceway surface 53a of an inner ring 51a of a bearing 39 of the first embodiment and face an introduction groove 66a. ing. The discharge groove 81a has the same configuration as the introduction groove 66a shown in the first embodiment, and the rotation of the inner ring 51a causes the introduction portion 71a to contact the contact portion 57a of the ball 55a with the inner ring 5a.
It is provided so as to guide the lubricating oil introduced between the raceway surfaces 53a of 1a and to forcibly discharge it outside the bearing 39. Other configurations and operations are the same as those of the first embodiment. Therefore, in this embodiment, effects similar to those of the first embodiment can be obtained.

FIG. 6 shows a third embodiment of a rolling bearing lubrication system according to the present invention.
It is a figure showing an example. In this embodiment, as shown in FIG. 6, in addition to the discharge groove 81a formed in the inner ring 51a and similar to the second embodiment, the inner ring 5
A ring-shaped protrusion 82a protruding toward 1a is formed, and a discharge portion 83a is formed in a small gap between the protrusion 82a and the discharge groove 81a. Then, with the rotation of the inner ring 51a, the discharging portion 83a
Acts in the same manner as the introduction portion 71a shown in the first embodiment, pressurizes the lubricating oil introduced between the contact portion 57a of the ball 55a and the raceway surface 53a of the inner ring 51a, and forcibly moves it outside the bearing 39. I try to discharge. Other configurations and operations are the same as those of the first embodiment, and therefore, the present embodiment also provides the same effects as those of the first embodiment.

FIG. 7 shows a fourth embodiment of a rolling bearing lubrication system according to the present invention.
FIG. 7 is a view showing an embodiment, and in the present embodiment, as shown in FIG. 7, a ring-shaped protrusion protruding toward the outer ring 52a at an opposite end of an introduction groove 66a sandwiching a ball 55a of an inner ring 51a. 8
4a, a small gap is provided between the projecting portion 84a and the raceway surface 54a of the outer ring 52a, and a spiral discharge groove 85a is formed on the projecting end surface of the projecting portion 84a. The above-described discharge groove 85a has the same configuration as the introduction groove 66a shown in the first embodiment, and forms a discharge portion 86a between the discharge groove 85a and the raceway surface 54a of the outer ring 52a.
Then, with the rotation of the inner ring 51a, the discharge portion 86a acts in the same manner as the introduction portion 71a shown in the first embodiment, and the contact portion of the ball 55a
The lubricating oil introduced between the raceway 57a and the raceway surface 53a of the inner ring 51a is pressurized to be forcibly discharged to the outside of the bearing 39. Other configurations and operations are the same as those of the first embodiment. Therefore, in this embodiment, the same effects as those of the first embodiment can be obtained. In addition, the above-mentioned third
The protrusions 82a and 84a in the embodiment and the fourth embodiment may be constituted by members separate from the outer ring 52a and the inner ring 51a, respectively.

(Effect) According to the present invention, a spiral introduction groove is formed in the raceway on the rotating side, and a lubricating oil introduction portion is formed between the stationary ring and the annular body that covers the opening end of the introduction groove. The lubricating oil supplied by the high-speed rotation of the bearing ring is pressurized and introduced between the rolling element and the bearing ring in a high-speed and splash form. For this reason, the lubricating oil can be reliably supplied between the rolling element and the raceway with a simple structure without a pressurizing source, regardless of the accompanying flow of the lubricating oil and air generated with the high-speed rotation of the rolling bearing. . Therefore, it is possible to provide a lubricating device for a rolling bearing which is free from overheating and seizure, has low facility costs and running costs, and is easy to maintain. Further, as described in detail in Examples of the present invention,
When the oil supply device for a rolling bearing according to the present invention is applied to an oil supply device for a bearing mounted on a rotating body provided on a rotating table, not only a pressurizing source for lubricating oil, but also
The effect of the present invention described above can be exhibited without regret, without requiring a rotary joint having a complicated structure.

[Brief description of the drawings]

1 to 4 are views showing a first embodiment of a lubricating device for a rolling bearing according to the present invention, and FIG. 1 is a front view of a turret type switching winder to which the lubricating device for a rolling bearing is applied. 2 is a sectional view taken along the line II-II of FIG. 1, FIG. 3 is a sectional view taken along the line III-III of FIG. 2, and FIG. 4 shows a structure of a lubricating device for the rolling bearing. It is a front sectional view. FIGS. 5 to 7 are front sectional views of a rolling bearing lubricating device showing second to fourth embodiments of the rolling bearing according to the present invention, respectively. 39, 40: Bearing (rolling bearing), 51a, 51b: Inner ring (a pair of races), 52a, 52b ... Outer ring (a pair of races), 53a, 53b, 54a, 54b: Raceway surface, 55a , 55b ... ball (rolling element), 57a, 57b, 58a, 58b ... contact part, 61a, 61b ... outer end, 66a, 66b ... introduction groove, 67a, 67b ... open end, 68a, 68b ... Annular body, 71a, 71b ... Introductory part.

Claims (1)

(57) [Claims] A rotating body rotatably provided so that an axial direction thereof is substantially perpendicular to a vertical direction; an axis extending in an axial direction of the rotating body; A drive shaft that rotates at a predetermined rotation speed, and a rolling bearing that supports the drive shaft, wherein the rolling bearing is
A pair of races, which are coaxially provided and have raceways facing each other in the radial direction and one of which rotates together with the drive shaft, and a contact which is disposed between the pair of races and contacts the raceways, respectively. A rolling element having a plurality of rolling elements, the lubricating oil being supplied from an axially outer end of a raceway, wherein the rotating body stores a certain amount of lubricating oil therein. And a lubricating oil reservoir having a receptacle protruding from an inner wall surface of the liquid accumulating chamber so that lubricating oil in the liquid accumulating chamber is pumped up with the rotation of the rotating body. And the rolling bearing has a guide groove formed in a spiral form from one end along the raceway surface to the vicinity of a contact portion of the rolling element, on a rotating raceway ring of the pair of raceways. When formed so as to substantially cover the introduction groove, An annular body provided stationary with respect to the rotating bearing ring, one end of a supply hole formed in the annular body communicates with the lubricating oil reservoir and the other end is one end of the introduction groove. A lubricating device for a rolling bearing, wherein the lubricating device is provided so as to be open in the vicinity and to have both ends of the supply hole vertically separated from each other.