JP2003239998A - Lubricant conditioning device for rolling bearing and method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device which makes filled lubricant reach the whole space inside a bearing equally, eliminates its bulging out, and flattens a rise on a surface of lubricant. <P>SOLUTION: A lubricant conditioning device 12 is provided with a bearing support means 41 for supporting the rolling bearing W in which lubricant like grease is filled in a condition in which it is at attitude at which it faces vertical direction and a slight moving rotation providing means 42 for moving slightly and rotating an inner ring or an outer ring of the rolling bearing W supported on the bearing support means forward and reversely. The bearing support means 41 supports the inner ring of the rolling bearing W in a fixed condition to rotate the outer ring freely. The slight moving rotation providing means 42 has two outer ring rotation rollers 46 coming into contact with the outer ring of the bearing by rolling and a drive source 47 for the slight moving rotation providing means for moving slightly and rotating the outer ring rotation rollers 46 forward and reversely. Both outer ring rotation rollers 46 are pressed against the outer ring of the bearing by a pressurizing means 48. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricant leveling device and method for enclosing grease or uncured solid lubricant in a rolling bearing such as a deep groove ball bearing.

[0002]

2. Description of the Related Art There are two types of specifications for enclosing a grease-like lubricant in a deep groove ball bearing, a spot pack specification and a full pack specification, depending on the lubricant encapsulation state. Each is determined based on the usage conditions. These two types are adopted both when the grease-like lubricant is grease and when it is an uncured solid lubricant at the time of sealing work. The spot pack specification refers to a bearing in which the amount of lubricant enclosed is approximately 30% of the bearing internal space volume. As a sealing condition, it is assumed that the lubricant is sealed on both sides between the rolling element pockets of the cage and the lubricant is connected through the cage. Encapsulation of the lubricant according to this specification can be performed easily by using an automatic grease encapsulation machine or manual encapsulation. On the other hand, in the full pack type, the amount of the lubricant enclosed is 50% or more of the bearing internal space volume, and the lubricant is enclosed so that the cage completely encloses the cage. Is.
In the case of an uncured solid lubricant, the rolling element and rolling surface are all covered with the lubricant after the encapsulated lubricant is thermally solidified. As a method of enclosing the grease-like lubricant according to this specification, there is a method of enclosing the lubricant by restraining both sides of the bearing with a mold.

However, the above-mentioned full pack specification has the following problems. Since the amount of the lubricant is large, as shown in FIG. 10, the lubricant G often protrudes into the seal grooves 1a and 2a of the bearing W. It may protrude from the bearing width surface. It is difficult to completely cover the rolling surfaces 1b and 2b of the bearing with the lubricant G. In some cases, the lubricant G does not spread evenly in the plane, and swelling occurs on the lubricant surface. When the lubricant is a solid lubricant, the protruding portion of the solidified lubricant comes into contact with the seal member, which increases the bearing rotation torque.

Therefore, conventionally, in order to solve such a problem, a lubricant is manually filled in the bearing so that the lubricant is evenly spread, or the grease is spread to the rolling surface of the bearing. In addition, the cover is pressed against the upper and lower surfaces of the bearing to fill the lubricant. In the case of solid lubricants,
After the encapsulated lubricant is thermally solidified, the lubricant adhering to the bearing width surface and the seal groove is removed. This removal is manual.
As described above, in the conventional full-pack type lubricant encapsulation method, since the manual work is mainly performed, a lot of man-hours are required, the manufacturing efficiency is low, and the cost is high.

An object of the present invention is to provide a lubricant leveling device for a rolling bearing which allows a filled lubricant to be evenly spread over the entire inner space of the bearing to prevent protrusion and to flatten the swell of the lubricant surface. Is to provide a method.

[0006]

The lubricant leveling device for a rolling bearing according to the present invention has a rolling bearing in which a bearing-like internal space between an inner ring and an outer ring is filled with a grease-like lubricant, which is oriented vertically. The bearing support means is supported in a state, and the fine motion rotation imparting means for finely rotating the inner ring or the outer ring of the rolling bearing supported by the bearing support means in the forward and reverse directions. With this configuration, the fine motion rotation imparting means finely rotates the inner ring or the outer ring of the rolling bearing in the forward and reverse directions, so that the filled lubricant is evenly distributed over the entire bearing inner space, and the entire bearing rolling surface is lubricated. Can be covered with agent. Also,
Even if the surface of the lubricant is bumped, it is flattened. Therefore, even if the lubricant is a solid lubricant, it is possible to prevent the raised portion from coming into contact with the seal member and increasing the torque. Further, it is possible to prevent the lubricant filled in the bearing internal space from sticking out and adhering to the seal groove.

In the present invention, the bearing support means is
The inner ring of the rolling bearing is fixedly supported to allow the outer ring to rotate.The fine motion rotation imparting means includes an outer ring rotating roller rollingly contacting the outer ring of the rolling bearing supported by the bearing supporting means, and the outer ring. It may have a fine motion rotation imparting drive source for finely rotating the rotary roller in the forward and reverse directions, and a pressurizing means for relatively pressing the outer ring rotary rollers against the outer ring. Two outer ring rotating rollers are provided. In this way, the inner ring is supported in a fixed state, and the outer ring rotating roller pressed against the outer ring imparts the fine motion rotation, so that the fine motion rotation imparting means having a simple structure can provide the fine motion rotation.

In this structure, the bearing support means for supporting the inner ring in a fixed state is such that the tip is press-fitted from above into the bearing support on which the inner ring of the rolling bearing is mounted and the inner ring of the rolling bearing on this bearing support. It may have an inner ring stator that fixes the inner ring in a positioned state. By thus configuring the bearing support means with the bearing support base and the press-fitting type inner ring stator, for example, rolling bearings that are sequentially conveyed can be positioned relative to the outer ring rotating roller without requiring an accurate positioning operation. Can be supported by. Therefore, in the case of automating the supply of the bearings, the conveying device may have a simple structure.

The fine movement rotation imparting means determines the amount of rotation of each of the fine movement rotations in the forward and reverse directions by 1 of the rolling element pitch of the rolling bearing.
It is preferable that the number is / 2 or less. As a result of the test, it has been found that such a pitch of 1/2 pitch or less is effective in equalizing the lubricant and flattening the bulge of the lubricant surface.

In the present invention, the rolling bearing may be a sealed rolling bearing without a seal. Further, in the present invention, the lubricant for the rolling bearing may be a solid lubricant in an uncured state. The uncured solid lubricant is solidified by heating or the like after being sealed in the bearing. In the case of a rolling bearing with a seal, it is difficult to remove the lubricant when it leaks into the seal groove. In particular, when the lubricant is a solid lubricant, it is difficult to remove the protruding lubricant after thermal solidification. Further, in the case of a solid lubricant, if the lubricant rises, it contacts the seal member and the torque increases. Therefore, in the case where a seal is provided or when the lubricant is a solid lubricant, the practical effect of flattening by the lubricant leveling device of the present invention is great.

The rolling bearing lubricant leveling and enclosing device of the present invention uses the rolling bearing lubricant leveling device of any of the above-described aspects of the present invention, and automates the process from encapsulation to flattening. That is, this lubricant leveling and enclosing device is composed of a lubricant filling device that fills the bearing internal space between the inner ring and the outer ring of the rolling bearing with a grease-like lubricant, a lubricant leveling device, and the above lubricant filling device. And a bearing conveying means for conveying the rolling bearing filled with the lubricant to the lubricant leveling device. The lubricant leveling device is a rolling bearing lubricant leveling device having any one of the above-described configurations of the present invention. With this configuration, the filling of the lubricant into the bearing internal space and the smoothing of the filled lubricant can be automatically and continuously processed, and the lubricant can be leveled evenly with good work efficiency and the swelling of the lubricant surface can be flattened. Can be done.

The lubricant leveling method for a rolling bearing according to the present invention supports a rolling bearing in which a grease-like lubricant is filled in a bearing inner space between an inner ring and an outer ring in a posture in which an axial direction is vertically oriented. This is a method of flattening the swelling of the surface of the lubricant in the bearing internal space by finely rotating the inner or outer ring of the supported rolling bearing in the forward and reverse directions. In this way, with the method of finely rotating the inner ring or the outer ring in the forward and reverse directions, it is possible to efficiently and evenly spread the lubricant with a simple device and flatten the swelling of the lubricant surface.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a schematic configuration of a lubricant leveling and enclosing device of this embodiment. This lubricant leveling and enclosing device includes a lubricant filling device 11 that fills the rolling bearing W with a grease-like lubricant, a lubricant leveling device 12, and a rolling bearing that has been filled with lubricant from the lubricant filling device 11. Bearing transfer means 13 for transferring W to the lubricant leveling device 12 is provided. The rolling bearing W is, for example, as shown in FIG.
The rolling bearing with a seal shown in (1) is carried into the lubricant leveling and enclosing device without the seal member 5 mounted.
The seal member 5 may be a non-contact shield plate or a contact seal member made of rubber or the like.

In FIG. 1, a conveyor 14 and a first conveying path 15 are provided in front of the bearing conveying means 13.
The conveyor 14 uses the rolling bearing W without the seal,
It is supplied sequentially from the previous process in a state in which the axial direction is vertical. The rolling bearings W on the conveyor 14 are cut out one by one by the pusher 18 and pushed out onto the first transport path 15. The first transport path 15 transports the loaded rolling bearing W to the ball alignment section 17 at the starting end of the bearing transport means 13. The ball alignment section 17 is means for aligning the pitch of the rolling elements 4 (FIG. 8) of the rolling bearing W at a constant pitch, and the alignment jig 19 is installed so as to be movable up and down. The positioning jig 19 is a member having a cylindrical shape and having a plurality of chevron portions 19a at the upper edge thereof, and the pitch of the chevron portions 19a is set to the rolling element pitch. While the rolling bearing W is being supplied to the ball positioning portion 17, the positioning jig 19 is moved upward, so that the chevron portion 19a enters into the rolling bearing W, and the rolling elements 4 of the rolling bearing W are positioned. Be matched.

The bearing transfer means 13 is of a transfer type, and has a second transfer path 16 passing through the lubricant filling device 11 and the lubricant leveling device 12, three work chucks 24A, 24B and 24C, and these. Chuck 24A
Chuck moving means 13a for causing 24C to perform periodic movement
With. The second transport path 16 starts from the ball alignment portion 17 and is orthogonal to the first transport path 15 (Y
Direction). The chuck moving means 13a is composed of an advancing / retreating cylinder 21 arranged in parallel with the second transport path 16 and an elevating cylinder 22 mounted on a moving body 21a of the advancing / retreating cylinder 21 to elevate the chuck support 23. . The chuck support 23 includes a plurality of guide rods 21a.
It is installed on the moving body 21a by a.

The above three work chucks 24A, 24
B and 24C are arranged side by side in the transport direction of the second transport path 16 on the chuck support base 23. The arrangement interval is a reference interval or an integer multiple thereof, and the reference interval is an advance / retreat stroke of the advance / retreat cylinder 21.
For example, the ball alignment unit 17 and the lubricant filling device 11
The interval between the lubricant filling device 11 and the lubricant leveling device 1
The distance between the work chucks 24A, 24B, and 24C is adjusted to this distance. Each of the work chucks 24A to 24C has a pair of gripping claws 25, 25 extending in a direction (X direction) orthogonal to the second transport path 16, and the rolling bearing W is driven by opening and closing the gripping claws 25. Grip and open.

The lubricant filling device 11 includes a second conveying path 16
A pair of nozzle fixtures 2 that can be lifted up and down
8 (only the upper nozzle fitting 28 is shown in FIG. 1). A plurality of lubricant filling nozzles 30 are provided at the lower end of the upper nozzle fitting 28 and the upper end of the lower nozzle fitting 28.
A nozzle case 29 having (FIG. 2) is attached. The upper and lower nozzle mounts 28 are driven up and down by an elevator drive source 31 composed of a cylinder. The lubricant filling nozzles 30 are arranged in a vertical posture so as to be aligned on the circumference of a predetermined diameter corresponding to the pitch of the balls 4 of the rolling bearing W.

As shown in FIG. 2, a lubricant supply hole 32 penetrates through the center of the upper nozzle mount 28, and a lubricant supply hose 33 is connected to the lubricant supply hole 32. A nozzle case 29 is fastened and fixed to the lower end of the nozzle fixture 28 with a bolt 34. A cavity 29a is formed as a recess at the center of the upper end of the nozzle case 29.
The base end of each lubricant filling nozzle 30 is projected on the bottom surface of 9a. A nozzle retainer 35 is fitted in the vacant chamber 29a, and is tightened and fixed to the nozzle case 29 by a bolt 36, and each lubricant filling nozzle 30 is fixed by the nozzle retainer 35.
Is being held. A plurality of through holes 37 communicating with each of the lubricant filling nozzles 30 penetrate through the nozzle retainer 35 in the thickness direction. The lower end surface of the nozzle fitting 28 and the upper end surface of the nozzle case 29 are joined via an O-ring 38 fitted into an annular groove 28a formed in the lower end surface of the nozzle fitting 28, whereby the nozzle fitting 28 The lubricant feeding hole 32 and each lubricant filling nozzle 30 are provided in the empty chamber 29.
It is communicated in an airtight manner through a and the through hole 37 of the nozzle retainer 35. At the center of the lower end of the nozzle case 29, there is formed a positioning protrusion 29b that fits into the inner diameter surface of the inner ring 1 of the rolling bearing W sent to the lubricant filling portion 26. The configuration of the nozzle case 29 and the like in the lower nozzle mount 28 is the same as that of the upper nozzle mount 28 shown in FIG. 2, though not shown.

FIG. 3 shows an enlarged sectional view of the lubricant filling nozzle 30. As an example of dimensions, the tip of the lubricant filling nozzle 30 has a conical shape with a taper angle θ of 10 °, and the tip outer diameter D
1 is 1 mmφ and the nozzle inner diameter D2 is 0.7 mmφ.

The filling amount of the lubricant G by the lubricant filling device 11 may be a spot pack specification, a full pack specification, or an intermediate value between the specifications. Numerically speaking, for the bearing internal space volume,
30% or less (spot pack specification), for example 25-30
%, 50% or more (full pack), for example 80
˜90% or 30 to 50% (intermediate specifications). The bearing internal space volume is the volume of the space between the inner ring 1 and the outer ring 2 (the remaining space excluding the rolling elements 4 and the cage 6). When the seal member 5 is provided, the space between the inner and outer rings 1 and 2 is set. It is the volume of the space between the seal members 5 on both sides of the space. Lubricant G with which the rolling bearing W is filled
May be a grease-like lubricant, and may be grease or uncured solid lubricant. The solid lubricant is a mixture of a resin material and grease or lubricating oil which is heat-treated and solidified. This solid lubricant is in the form of grease when it is filled in the rolling bearing W.

The lubricant leveling device 12 in FIG. 1 is shown in side view in FIG. The lubricant leveling device 12 is configured such that the rolling bearing W filled with the lubricant is in a posture in which the axial direction is vertically oriented,
It is provided with a bearing support means 41 supported at a predetermined position, that is, the lubricant leveling portion 27, and a fine motion rotation imparting means 42 for finely rotating the outer ring 2 of the rolling bearing W supported by the bearing support means 41 in forward and reverse directions. The bearing support means 41 supports the inner ring 1 of the rolling bearing W in a fixed state and allows the outer ring 2 to rotate freely. The bearing support base 43 on which the inner ring 1 of the rolling bearing W is placed and the bearing support base 43 The inner ring 1 of the rolling bearing W is press-fitted from the upper end to fix the inner ring 1 in a positioning state. Inner ring stator 44
Has a tapered outer periphery, and is driven up and down by a lifting drive source 45 composed of a cylinder device or the like. The fine motion rotation imparting means 42 includes two outer ring rotating rollers 46 (see FIG. 5) rollingly contacting the outer ring 2 of the rolling bearing W supported by the bearing supporting means 41, and finely rotating these outer ring rotating rollers 46 in the forward and reverse directions. It has a drive source 47 for giving a fine movement rotation and a pressurizing means 48 for pressing both outer ring rotating rollers 46 relative to the outer ring 2. The fine-movement rotation imparting drive source 47 is composed of a stepping motor, and its rotation output is transmitted to both outer ring rotating rollers 46 by a transmission mechanism 53 including pulleys 49 to 51 and an endless belt 52 wound around these pulleys. The pressurizing means 48 is composed of a cylinder device, and moves forward / backward together with the advance / retreat base 58 on which the fine motion rotation imparting drive source 47 and the outer ring rotary roller 46 are installed.

The lubricant leveling device 12 is provided with a confirmation camera 54 above the lubricant leveling section 27. The confirmation camera 54 is for confirming the leveling state of the lubricant with which the rolling bearing W is filled, for example, a CCD.
It consists of a camera. In FIG. 1, a carry-out chute 55 for carrying out the rolling bearing W for which the leveling process has been completed is continuously provided at the rear end of the second transport path 16. When the lubricant G sealed in the rolling bearing W is an uncured solid lubricant, a firing device 59 is provided as the next step of the lubricant leveling and packing device.

Next, the filling of the lubricant by the lubricant leveling and enclosing device and the lubricant leveling process will be described. The rolling bearing W is supplied to the ball alignment section 17 which is the starting end of the second transport path 16 via the conveyor 14 and the first transport path 15. In the ball alignment unit 17, the alignment jig 19 is provided from the lower side of the supplied rolling bearing W.
Rises and the rolling elements 4 are aligned so as to have a predetermined pitch. When this alignment is completed, the rolling bearing W of the ball alignment portion 17 is gripped by the first work chuck 24A. Then, the lifting cylinder 22 raises the chuck support 23, the advancing / retracting cylinder 21 moves the chuck support 23 in the Y direction, and the chuck support 23 descends. Through this series of operations, the rolling bearing W gripped by the first work chuck 24A is transported to the lubricant filling section 26 of the lubricant filling device 11. Simultaneously with this conveyance, the lubricant filling section 2 of the lubricant filling device 11
The filled rolling bearing W in 6 was conveyed to the lubricant leveling device 12 by the second work chuck 24B,
In addition, the rolling bearing W that has been lubricated in the lubricant leveling device 12 is conveyed to the chute 55. After this transportation, the bearing transportation means 13 returns to the original standby state by performing an operation reverse to the above operation.

In the lubricant filling device 11, the upper and lower nozzle fittings 28 are respectively raised and lowered by the drive of the elevating drive source 31, and the upper and lower lubricant filling nozzles 30 (FIG. 2) are connected to the rolling bearing W. The bearing inner space 3 is approached from above and below, respectively. In this state, by driving a dedicated lubricant metering cylinder (not shown), the lubricant is filled in the rolling bearing W from the lubricant supply hose 33 through the nozzle fitting 28, the nozzle case 29 and the lubricant filling nozzle 30. It FIG. 6A shows a plan view of the rolling bearing W filled with the lubricant G in this manner.

The distance between the tip of the lubricant filling nozzle 30 and the cage 5 of the rolling bearing W during filling depends on various conditions, but is set to 0.7 mm, for example. This interval is 0.7m
When the width is smaller than m, the lubricant to be filled hits the cage 6 (FIG. 8) and spreads laterally, and the lubricant filling nozzle 3
It rises up along 0. In addition, the gap is 0.7 m
If the width is larger than m, the force of the filled lubricant hitting the cage 6 (FIG. 8) to spread laterally becomes weak and the lubricant rises upward. In this case also, the time required for the flattening treatment of the lubricant becomes long. Therefore, 0.7 mm is preferable.

When the lubricant is filled in this way, the upper and lower nozzle fittings 28 of the lubricant filling device 11 are respectively retreated up and down, and the rolling bearing W filled with the lubricant is moved to the second position.
It is gripped by the work chuck 24B and is conveyed to the lubricant leveling device 12. This transportation is performed simultaneously with the transportation of the rolling bearing W in which the ball alignment portion 17 has been aligned as described above and the rolling bearing W in which the lubricant leveling device 12 has been leveled.

In the lubricant leveling device 12, with respect to the rolling bearing W carried into the lubricant leveling portion 27, the inner ring stator 44 is lowered by the driving of the lifting drive source 45 of the bearing support means 41, and the inner ring 1 The inner ring 1 is fixed by press-fitting the tip to the inner diameter surface of the. Then, by driving the pressurizing means 48,
The pair of outer ring rotating rollers 46 of the fine motion rotation imparting means 42 is pressed against the outer diameter surface of the outer ring 2 of the rolling bearing W. In this state, by finely moving the fine motion rotation imparting means drive source 47 in the forward and reverse directions, the rotation output is transmitted to the pair of outer ring rotating rollers 46 through the transmission mechanism 53, and the outer ring 2 of the rolling bearing W is moved in the forward and reverse directions. Rotate. The rotation amount A (FIG. 6A) at each time of the forward and reverse fine movement rotations is, for example, 1/2 of the pitch P between the rolling elements 4 of the rolling bearing W. In addition, the outer ring rotating roller 46
The radial load for contacting with is, for example, 2N.

As the rolling bearing W is finely rotated in the forward and reverse directions in this manner, the lubricant G (FIG. 6A) filled in the bearing internal space 3 of the rolling bearing W becomes as shown in FIG. Flattened. Camera 5 for checking the flattened situation
4 monitors and makes a pass / fail judgment by image processing or the like based on the monitoring result. The non-defective rolling bearing W is carried out to the chute 55 by the bearing carrying means 13 and sent to the next step. In the case of a defective break-in, the line is taken out from the line by an appropriate carrying-out means (not shown) or manual work.

When the lubricant is an uncured fixed lubricant, the rolling bearing W having the lubricant leveled is visually inspected in the next step, and the firing device 59 is further operated at a predetermined temperature and time. Thermal solidification of the lubricant G is performed. Lubricant G
When the thermal solidification of the bearing is completed and the rolling bearing W is cooled, the seal loading device (not shown) inserts the seal member 5 into the seal grooves 1a and 2a of the inner and outer rings 1 and 2, and the appearance of the lubricant The enclosed rolling bearing W is completed. One of the seal grooves 1a and 2a is a groove for mounting the seal member 5, and the other groove is a groove with which the tip of the seal member 5 contacts or approaches.

According to the lubricant leveling device 12, the outer ring 2 of the rolling bearing W is finely rotated in the forward and reverse directions as described above, so that the filled lubricant G is evenly distributed over the entire bearing internal space 3 and The entire surfaces of the rolling surfaces 1b and 2b can be covered with the lubricant G. Further, even if the surface of the lubricant G is raised, it is flattened. Therefore, even if the lubricant G is a solid lubricant, it is possible to prevent the raised portion from coming into contact with the seal member 5 and causing an increase in torque. In addition, the lubricant G sealed in the bearing inner space 3 causes the seal grooves 1a and 2a to
It is also prevented from sticking out and adhering, and the removal work is unnecessary.

The bearing support means 41 in the lubricant leveling device 12 supports the inner ring 1 of the rolling bearing W in a fixed state,
The outer ring 2 is rotated by the outer ring rotating roller 46 pressed against the outer ring 2.
Since the fine movement rotation is given to the fine movement rotation, it is possible to give the fine movement rotation with a simple configuration. In particular, the bearing support means 41
Is composed of the bearing support base 43 and the press-fitting type inner ring stator 44, so that the rolling bearings W, which are sequentially conveyed, are supported in a positioned state with respect to the outer ring rotating roller 46 without requiring an accurate positioning operation. can do. Therefore, the rolling bearing W can be loaded into the bearing support means 41 only by carrying the transfer type bearing carrying means 13. The fine motion rotation imparting means 47 calculates the rotation amount A of each time of forward and reverse fine motion rotation as the rolling element pitch P of the rolling bearing W.
However, if it is set in this range, it is efficient in equalizing the lubricant G and flattening the bulge of the lubricant surface.

Further, since this lubricant leveling and enclosing device is provided with the lubricant filling device 11, the lubricant leveling device 12, and the bearing conveying means 13, the process from the filling of the lubricant to the leveling process is automatic. Can be continuously processed, and work efficiency can be improved.

FIG. 9 is a side view showing another embodiment of the lubricant leveling device. In this lubricant leveling device 12A, the bearing support means 61 for supporting the rolling bearing W filled with the lubricant G in a state in which it is in the up and down orientation is the same as the third work chuck 24C of the bearing transfer means 13. , A bearing support 63 on which the inner ring 1 of the rolling bearing W is mounted. The bearing support 63 is a turntable. That is, in the rolling bearing W, the inner ring 1 is rotatably mounted on the bearing support 63 with the outer ring 2 thereof being held and fixed by the third work chuck 24C. Further, in the lubricant leveling device 12A, the fine motion rotation imparting means 62 is
The inner ring 1 of the rolling bearing W supported by the bearing support means 63 is finely rotated in the forward and reverse directions. That is, the fine motion rotation imparting means 62 includes an inner ring engaging element 64 press-fitted from above into the inner ring 1 of the rolling bearing W on the bearing support 63,
The inner ring engaging element 64 is provided with a fine-movement rotation imparting drive source 67 for finely rotating the inner-ring engager 64 in the forward and reverse directions. The fine-motion rotation imparting drive source 67 is driven up and down by a lifting drive source 65 composed of a cylinder.

According to the lubricant leveling device 12A, the lubricant-filled rolling bearing W conveyed to the lubricant leveling portion 27 has the inner ring 1 placed on the bearing support 63 and the outer ring 2 It is gripped by the third work chuck 24C. In this supporting state, the inner ring engaging element 64 of the fine motion rotation imparting means 62 descends from above and press fits into the inner ring 1. In this state, the inner ring engaging element 64 is driven by the fine motion rotation imparting means drive source 67.
Is finely rotated in the forward and reverse directions, so that the inner ring 1 of the rolling bearing W is finely rotated in the forward and reverse directions. As a result, the lubricant G filled in the bearing internal space 3 of the rolling bearing W is smoothed.

The solid lubricant used as the lubricant G is a mixture of a resin material and grease or lubricating oil as described above which is heat treated to be solidified. For example, the following various lubricating compositions are used. Things can be used. (1) A lubricating composition in which a liquid or semi-solid mixture obtained by mixing a high molecular weight polyethylene and a lubricating oil such as mineral oil is heat-treated to be solidified. (2) A lubricating composition in which a mixture of ultra-high molecular weight polyethylene and a lubricating grease having a dropping point higher than the melting temperature of the polyethylene is heated to the melting temperature and solidified. (3) 5 to 99 wt% of lubricating grease having a dropping point higher than the gelation point of the ultrahigh molecular weight polyolefin having an average molecular weight of about 1 × 10 6 to 5 × 10 6 and the ultrahigh molecular weight polyolefin powder 95 to 1 having a particle size of 1 to 100 μm. A lubricating composition in which 1 wt% is mixed and dispersed and maintained at a temperature equal to or higher than the gel point. (4) 5 to 99 wt% of lubricating grease having a dropping point higher than the gelation point of an ultrahigh molecular weight polyolefin having an average molecular weight of about 1 × 10 6 to 5 × 10 6 and the ultrahigh molecular weight polyolefin powder 95 to 1 having a particle diameter of 1 to 100 μm. A lubricating composition in which 1 wt% and 1 to 50 wt% of an additive for suppressing oil seepage are mixed and dispersed and held at a temperature equal to or higher than the gel point. The average molecular weight and the mixing ratio of each composition in the above (3) and (4) are preferable examples, and the average molecular weight and the mixing ratio are not necessarily the above.

[0036]

The lubricant leveling device for a rolling bearing according to the present invention supports a rolling bearing having a bearing-like internal space between an inner ring and an outer ring filled with a grease-like lubricant in a vertically oriented posture. Since the bearing support means and the fine movement rotation imparting means for finely rotating the inner ring or the outer ring of the rolling bearing supported by the bearing support means in the forward and reverse directions are provided, the filled lubricant is evenly distributed in the entire inner space of the bearing. To the
The protrusion can be eliminated and the swelling of the lubricant surface can be flattened. The lubricant leveling and enclosing device of the present invention is
It is possible to automatically and continuously perform the filling of the lubricant into the bearing internal space and the smoothing treatment of the filled lubricant, which makes it possible to equalize the lubricant with good work efficiency and flatten the bulge of the lubricant surface. The method of smoothing the lubricant of the rolling bearing of the present invention is
The rolling bearing, in which the grease-like lubricant is filled in the bearing inner space between the inner ring and the outer ring, is supported in a posture in which the axial direction is vertical, and the inner ring or outer ring of the supported rolling bearing is finely rotated in the forward and reverse directions. By doing so, the method of flattening the swelling of the lubricant surface in the bearing internal space is described above, so that the filled lubricant is evenly spread over the entire bearing internal space to prevent squeeze out and flatten the swelling of the lubricant surface. can do.

[Brief description of drawings]

FIG. 1 is a perspective view showing a lubricant leveling and enclosing device for a rolling bearing according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a main part of a lubricant sealing device in the lubricant leveling sealing device.

FIG. 3 is a vertical sectional view showing a grease sealing nozzle of the lubricant sealing device.

FIG. 4 is a partial side view of the lubricant leveling device in the lubricant leveling and enclosing device.

FIG. 5 is a plan view showing a main part of the lubricant leveling device.

FIG. 6 is an explanatory diagram of a lubricant leveling operation by the lubricant leveling device.

FIG. 7 is a cross-sectional view showing a rolling bearing in which a lubricant is filled by the lubricant leveling and filling device.

FIG. 8 is a cross-sectional view of a rolling bearing which is a target of lubricant leveling and filling by the lubricant leveling and filling device.

FIG. 9 is a side view showing another embodiment of the lubricant leveling device.

FIG. 10 is a half sectional view of a rolling bearing in which a lubricant is sealed by a conventional lubricant leveling method.

[Explanation of symbols]

11 ... Lubricant filling device 12, 12A ... Lubricant leveling device 13 ... Bearing conveying means 41, 61 ... Bearing support means 42, 62 ... Fine motion rotation imparting means 43 ... Bearing support 44 ... Inner ring stator 46 ... Outer ring rotating roller 47 ... Drive source for applying fine movement rotation 48 ... Pressurizing means W ... Rolling bearing G ... Lubricant

Continued front page    F-term (reference) 3J017 AA10 HA02                 3J101 CA01 DA20 EA63 FA32 FA46                 4D075 AC06 AC73 CA09 CA47 DA23                       DB01 DC15 EA05 EB13                 4F041 AA04 AA17 AB01 BA05 BA51                 4F042 AA13 AA28 AB00 DC03 DD11                       DD17 DD18 DD25 DF06 DF16                       DF33 ED05

Claims (8)

[Claims] 1. A bearing support means for supporting a rolling bearing in which a bearing-like inner space between an inner ring and an outer ring is filled with a grease-like lubricant in an up and down posture, and a bearing support means supported by the bearing support means. A lubricant leveling device for a rolling bearing, comprising a fine movement rotation imparting means for finely rotating the inner ring or the outer ring of the rolling bearing in forward and reverse directions. 2. The bearing support means supports the inner ring of the rolling bearing in a fixed state to allow the outer ring to rotate, and the fine motion rotation imparting means is provided for the rolling bearing supported by the bearing support means. One having two outer ring rotating rollers rollingly contacting with the outer ring, a drive source for finely rotating the outer ring rotating roller to finely rotate the outer ring rotating roller in forward and reverse directions, and a pressurizing means for relatively pressing both outer ring rotating rollers against the outer ring. The lubricant leveling device for a rolling bearing according to claim 1. 3. The bearing support means comprises: a bearing support on which an inner ring of a rolling bearing is mounted; and an inner ring fixing for fixing the inner ring in a positioned state by press-fitting the tip from above into the inner ring of the rolling bearing on the bearing support. The lubricant leveling device for a rolling bearing according to claim 2, which has a child. 4. The fine movement rotation imparting means sets the amount of rotation of each of the forward and reverse fine movement rotations to ½ or less of the rolling element pitch of the rolling bearing. Rolling bearing lubricant leveling device. 5. The lubricant for a rolling bearing according to claim 1, wherein the rolling bearing supported by the bearing supporting means is in a sealed rolling bearing without a seal. apparatus. 6. The lubricant for a rolling bearing according to claim 1, wherein the lubricant for the rolling bearing supported by the bearing supporting means is a solid lubricant in an uncured state. Equipment. 7. A lubricant filling device for filling a grease-like lubricant into a bearing internal space between an inner ring and an outer ring of a rolling bearing,
A lubricant leveling device, and a bearing transporting means for transporting a lubricant-filled rolling bearing from the lubricant filling device to the lubricant leveling device, the lubricant leveling device comprising: A rolling bearing lubricant leveling device as the rolling bearing lubricant leveling device according to claim 6. 8. A rolling bearing in which a grease-like lubricant is filled in a bearing inner space between the inner ring and the outer ring is supported in a posture in which the axial direction is vertically oriented, and the inner ring or the outer ring of the supported rolling bearing is positively supported. On the contrary, a method of smoothing the lubricant of the rolling bearing in which the swelling of the surface of the lubricant in the bearing internal space is flattened by finely rotating the bearing.