JP4087617B2 - Lubricator leveling device for rolling bearings - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  This invention is a lubricant leveling device in which grease or uncured solid lubricant is encapsulated in a rolling bearing such as a deep groove ball bearing.In placeRelated.
[0002]
[Prior art and problems to be solved by the invention]
There are two types of specifications for enclosing grease-like lubricants in deep groove ball bearings: spot pack specifications and full pack specifications, depending on the state of lubricant inclusion. Each is determined based on usage conditions. These two types are employed both when the grease-like lubricant is grease and when it is an uncured solid lubricant during the sealing operation.
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 the sealing condition, the lubricant is sealed on both sides between the rolling element pockets of the cage, and the lubricant is connected via the cage. Encapsulation of the lubricant according to this specification can be easily performed by using an automatic grease filling machine or by manual filling.
On the other hand, in the full pack specification, the amount of lubricant enclosed is 50% or more of the internal space volume of the bearing, and the state in which the lubricant is enclosed is a state in which the entire cage is covered with the lubricant and hidden. It is. In the case of an uncured solid lubricant, the rolling elements and the rolling surfaces are all covered with the lubricant after the encapsulated lubricant is solidified by heat. As a method of enclosing the grease-like lubricant according to this specification, there is a method of enclosing the lubricant by restraining both surfaces of the bearing with a mold.
[0003]
However, the full pack specification has the following problems.
(1) Since the amount of the lubricant is large, the lubricant G protrudes into the seal grooves 1a and 2a of the bearing W as shown in FIG. It may protrude from the bearing width surface.
(2) It is difficult to completely cover the rolling surfaces 1b, 2b of the bearing with the lubricant G.
(3) Lubricant G may not spread evenly and planarly, and the surface of the lubricant may rise.
When the lubricant is a solid lubricant, the protruding portion of the solidified lubricant comes into contact with the seal member, and the bearing rotational torque is increased.
[0004]
Therefore, conventionally, in order to solve such a problem, the bearing is manually filled with a lubricant so that the lubricant spreads evenly or the grease spreads to the rolling surface of the bearing. The lid is pressed against both the upper and lower surfaces of the material to enclose the lubricant. In the case of a solid lubricant, the lubricant adhering to the bearing width surface and the seal groove is removed after the encapsulated lubricant is solidified by heat. This removal is manual.
As described above, the conventional full-pack specification lubricant enclosing method mainly involves manual work, which requires a large number of work steps, low production efficiency, and high cost.
[0005]
  An object of the present invention is to distribute the filled lubricant evenly over the entire interior space of the bearing, eliminate the protrusion, and smoothen the bulge on the surface of the lubricant.PlaceIs to provide.
[0006]
[Means for Solving the Problems]
A lubricant leveling device for a rolling bearing according to the present invention comprises a bearing support means for supporting a rolling bearing in which a grease-like lubricant is filled in a bearing internal space between an inner ring and an outer ring in a state of being vertically oriented. A fine rotation providing 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.
According to this configuration, the finely rotating rotation means finely rotates the inner ring or outer ring of the rolling bearing in the forward and reverse directions, so that the filled lubricant is evenly distributed throughout the bearing inner space, and the entire bearing rolling surface is lubricated. Can be covered with an agent. Further, even if the surface of the lubricant is raised, 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 causing an increase in torque. Further, it is possible to prevent the lubricant enclosed in the bearing inner space from sticking out into the seal groove.
[0007]
  UpThe bearing support means supports the inner ring of the rolling bearing in a fixed state so that the outer ring can rotate freely. The fine movement rotation imparting means is an outer ring that is in rolling contact with the outer ring of the rolling bearing supported by the bearing support means. A rotation roller, a fine-rotation rotation drive source for finely rotating the outer ring rotation roller in the forward and reverse directions, and a pressure unit that presses the outer ring rotation rollers relatively against the outer ring.is there.Two outer ring rotating rollers are provided.
  By thus supporting the inner ring in a fixed state and giving fine movement rotation by the outer ring rotating roller pressed against the outer ring, fine rotation can be given by the fine rotation rotation applying means having a simple configuration.
[0008]
In this configuration, the bearing support means for supporting the inner ring in a fixed state includes a bearing support base on which the inner ring of the rolling bearing is placed, and a tip is press-fitted into the inner ring of the rolling bearing on the bearing support base from above so that the inner ring is It is good also as what has an inner ring | wheel stator fixed to a positioning state.
By configuring the bearing support means with the bearing support base and the press-fitted inner ring stator in this way, for example, the rolling bearings that are sequentially conveyed are positioned with respect to the outer ring rotating roller without requiring an accurate positioning operation. Can be supported. For this reason, when the bearing supply is automated, the conveying device may have a simple configuration.
[0009]
It is preferable that the fine movement rotation imparting means is configured so that a rotation amount of each forward and reverse fine movement rotation is ½ or less of a rolling element pitch of the rolling bearing.
As a result of the test, it was found that setting the pitch to ½ pitch or less in this way has good efficiency in equalizing the lubricant and flattening the swelling of the lubricant surface.
[0010]
In the present invention, the rolling bearing may be in a state where the seal is not mounted in the rolling bearing with seal.
In the present invention, the rolling bearing lubricant 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 protrudes into the seal groove. In particular, when the lubricant is a solid lubricant, it is difficult to remove the protruding lubricant after heat solidification. In the case of a solid lubricant, if the lubricant swells, the torque increases due to contact with the seal member. Therefore, when 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.
[0011]
The rolling bearing lubricant leveling and sealing device of the present invention uses the rolling bearing lubricant leveling device of any of the above-described configurations of the present invention and automates from sealing to flattening. That is, this lubricant leveling device includes a lubricant filling device that fills a bearing internal space between an inner ring and an outer ring of a rolling bearing with a grease-like lubricant, a lubricant leveling device, and the lubricant filling device. Bearing transport means for transporting the rolling bearing filled with the lubricant to the lubricant leveling device. The lubricant leveling device is a lubricant leveling device for a rolling bearing having any one of the configurations of the present invention.
According to this configuration, it is possible to automatically and continuously process the filling of the lubricant into the bearing inner space and the smoothing of the filled lubricant, and the lubricant can be evenly distributed and the bulge of the surface of the lubricant can be smoothed efficiently. Can be done.
[0013]
DETAILED DESCRIPTION OF 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 the lubricant leveling device of this embodiment. The lubricant leveling device includes a lubricant filling device 11 that fills a 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 conveying means 13 for conveying W to the lubricant leveling device 12 is provided. The rolling bearing W is a rolling bearing with a seal as shown in FIG. 8, for example, and is carried into the lubricant leveling device with the seal member 5 not attached. The seal member 5 may be a non-contact shield plate or a contact seal member such as rubber.
[0014]
In FIG. 1, a conveyor 14 and a first conveyance path 15 are provided in the front stage of the bearing conveyance means 13, and the conveyor 14 is in a state in which the rolling bearing W without the seal is in a posture in which the axial direction is vertically directed. In order from the previous process. The rolling bearings W on the conveyor 14 are cut out one by one by the pusher 18 and pushed out onto the first conveyance path 15. The first transport path 15 transports the loaded rolling bearing W to the ball alignment unit 17 at the start end of the bearing transport means 13. The ball alignment unit 17 is a means for adjusting the pitch of the rolling elements 4 (FIG. 8) of the rolling bearing W to be constant, and an alignment jig 19 is installed so as to be movable up and down. The alignment jig 19 is a member that is cylindrical and has a plurality of chevron portions 19a on the periphery of the upper end, and the pitch of the chevron portions 19a is set to the rolling element pitch. In a state where the rolling bearing W is supplied to the ball alignment portion 17, the positioning jig 19 is raised, so that the chevron 19 a enters the rolling bearing W, and each rolling element 4 of the rolling bearing W is positioned. To be combined.
[0015]
The bearing conveying means 13 is of a transfer type, and includes a second conveying path 16 that passes through the lubricant filling device 11 and the lubricant leveling device 12, three work chucks 24A, 24B, and 24C, and these chucks 24A to 24C. And chuck moving means 13a for causing 24C to perform periodic motion. The second transport path 16 extends in a direction (Y direction) orthogonal to the first transport path 15 with the ball alignment unit 17 as a starting end. The chuck moving means 13a includes an advance / retreat cylinder 21 arranged in parallel with the second transport path 16, and an elevating cylinder 22 mounted on the moving body 21a of the advance / retreat cylinder 21 to raise and lower the chuck support 23. . The chuck support base 23 is installed on the movable body 21a by a plurality of guide rods 21aa so as to be movable up and down.
[0016]
The three work chucks 24 </ b> A, 24 </ b> B, and 24 </ b> C are arranged on the chuck support base 23 side by side in the transport direction of the second transport path 16. The arrangement interval is a reference interval or an integer multiple of the reference interval, and the reference interval is an advance / retreat stroke of the advance / retreat cylinder 21. For example, the interval between the ball alignment unit 17 and the lubricant filling device 11 is matched to the interval between the lubricant filling device 11 and the lubricant leveling device 12, and the interval between the work chucks 24A, 24B, and 24C is set to this interval. Are matched. Each work chuck 24 </ b> A to 24 </ b> C has a pair of gripping claws 25, 25 extending in a direction (X direction) orthogonal to the second conveyance path 16, and the rolling bearings W are driven by opening and closing both gripping claws 25. Grip and release.
[0017]
The lubricant filling device 11 includes a pair of nozzle fixtures 28 that can be moved up and down along the second conveyance path 16 (only the upper nozzle fixture 28 is shown in FIG. 1). A nozzle case 29 having a plurality of lubricant filling nozzles 30 (FIG. 2) is attached to the lower end of the upper nozzle fixture 28 and the upper end of the lower nozzle fixture 28. The upper and lower nozzle fixtures 28 are driven up and down by an up-and-down drive source 31 comprising cylinders. The lubricant filling nozzles 30 are arranged in a vertical posture on the circumference of a predetermined diameter so as to correspond to the pitch of the balls 4 of the rolling bearing W.
[0018]
As shown in FIG. 2, a lubricant supply hole 32 passes through the center of the upper nozzle fixture 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 by a bolt 34. An empty chamber 29a is formed as a recess in the center of the upper end of the nozzle case 29, and the base ends of the respective lubricant filling nozzles 30 protrude from the bottom surface of the empty chamber 29a. A nozzle presser 35 is fitted into the empty chamber 29 a and is fastened and fixed to the nozzle case 29 by a bolt 36, and each lubricant filling nozzle 30 is pressed by the nozzle presser 35. A plurality of through holes 37 communicating with the respective lubricant filling nozzles 30 penetrates the nozzle presser 35 in the thickness direction. The lower end surface of the nozzle fixture 28 and the upper end surface of the nozzle case 29 are joined via an O-ring 38 that is fitted in an annular groove 28a formed on the lower end surface of the nozzle fixture 28. The lubricant inlet hole 32 and each lubricant filling nozzle 30 are in airtight communication with each other through the empty chamber 29 a and the through hole 37 of the nozzle retainer 35. At the center of the lower end of the nozzle case 29, a positioning projection 29 b is formed that fits to the inner diameter surface of the inner ring 1 of the rolling bearing W sent to the lubricant filling portion 26.
In addition, although illustration is abbreviate | omitted about the structure of the nozzle case 29 grade | etc., In the lower nozzle fixture 28, it is the same as that of the upper nozzle fixture 28 shown in FIG.
[0019]
FIG. 3 shows an enlarged cross-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 °, the tip outer diameter D1 is 1 mmφ, and the nozzle inner diameter D2 is 0.7 mmφ.
[0020]
The filling amount of the lubricant G by the lubricant filling device 11 may be an amount corresponding to a spot pack specification, an amount corresponding to a full pack specification, or an intermediate between both specifications. In terms of numerical values, even if it is 30% or less (spot pack specification), for example, 25-30%, or 50% or more (full pack), for example, 80-90%, relative to the bearing internal space volume, Further, it may be 30 to 50% (intermediate specification). 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). It is the volume of the space between the sealing members 5 on both sides of the space.
The lubricant G filled in the rolling bearing W may be a grease-like lubricant, and may be a grease or an uncured solid lubricant. The solid lubricant is obtained by solidifying a mixture of a resin material and grease or lubricating oil by heat treatment. This solid lubricant is in the form of grease when the rolling bearing W is filled.
[0021]
The lubricant leveling device 12 in FIG. 1 is shown in a side view in FIG. The lubricant leveling device 12 has a bearing support means 41 that supports the rolling bearing W filled with the lubricant in a predetermined position, that is, the lubricant leveling section 27, in a posture in which the axial direction is vertically directed, and the bearing support means. A fine rotation providing means 42 for finely rotating the outer ring 2 of the rolling bearing W supported by 41 in the forward and reverse directions. The bearing support means 41 supports the inner ring 1 of the rolling bearing W in a fixed state so that the outer ring 2 can rotate freely. A 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 has an inner ring stator 44 whose tip is press-fitted from above to fix the inner ring 1 in a positioned state. The inner ring stator 44 has a tapered outer periphery at the tip, and is driven up and down by a lift drive source 45 formed of a cylinder device or the like. The fine rotation rotation imparting means 42 includes two outer ring rotation rollers 46 (see FIG. 5) which are in rolling contact with the outer ring 2 of the rolling bearing W supported by the bearing support means 41, and these outer ring rotation rollers 46 are finely rotated in the forward and reverse directions. A drive source 47 for imparting fine rotation to be pressed, and a pressurizing means 48 for pressing both outer ring rotating rollers 46 against the outer ring 2 relatively. The fine-rotation-rotation imparting drive source 47 is composed of a stepping motor, and its rotational output is transmitted to both outer ring rotation 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 advances and retreats together with the advancing / retreating table 58 on which the fine-rotation-rotating imparting drive source 47 and the outer ring rotating roller 46 are installed.
[0022]
In the lubricant leveling device 12, a confirmation camera 54 is provided above the lubricant leveling unit 27. The confirmation camera 54 is for confirming the leveling condition of the lubricant filled in the rolling bearing W, and is composed of, for example, a CCD camera.
In FIG. 1, an unloading chute 55 for unloading the rolling bearing W that has been subjected to the leveling process is continuously provided at the rear end of the second conveying path 16. When the lubricant G to be 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 device.
[0023]
Next, the filling of the lubricant by the lubricant leveling device and the leveling treatment of the lubricant will be described. The rolling bearing W is supplied to the ball alignment unit 17 that is the starting end of the second conveyance path 16 via the conveyor 14 and the first conveyance path 15. In the ball alignment unit 17, the alignment jig 19 rises from the lower side of the supplied rolling bearing W, and the respective rolling elements 4 are aligned at a predetermined pitch.
When this alignment is completed, the rolling bearing W of the ball alignment unit 17 is gripped by the first work chuck 24A. Next, the chuck support 23 is lifted by the lift cylinder 22, the chuck support 23 is moved in the Y direction by the advance / retreat cylinder 21, and the chuck support 23 is lowered. By this series of operations, the rolling bearing W held by the first work chuck 24 </ b> A is conveyed to the lubricant filling unit 26 of the lubricant filling device 11. Simultaneously with this conveyance, the filled rolling bearing W in the lubricant filling portion 26 of the lubricant filling device 11 is conveyed to the lubricant leveling device 12 by the second work chuck 24B, and the lubricant leveling device. The rolling bearing W that has been leveled with the lubricant 12 is conveyed to the chute 55. After this conveyance, the bearing conveyance means 13 performs an operation reverse to the above operation and returns to the original standby state.
[0024]
In the lubricant filling device 11, the upper and lower nozzle fittings 28 are raised and lowered by driving of the lifting drive source 31, and the upper and lower lubricant filling nozzles 30 (FIG. 2) are the bearing inner space of the rolling bearing W. Approach 3 from above and below. In this state, by driving a dedicated lubricant metering cylinder (not shown), the lubricant is filled into the rolling bearing W from the lubricant supply hose 33 through the nozzle fixture 28, the nozzle case 29 and the lubricant filling nozzle 30. The FIG. 6A shows a plan view of the rolling bearing W in such a state that the lubricant G is filled in this way.
[0025]
In addition, although the space | interval of the front-end | tip of the lubricant filling nozzle 30 at the time of filling and the holder | retainer 5 of the rolling bearing W depends on various conditions, it is set to 0.7 mm, for example. When this interval is narrower than 0.7 mm, the filled lubricant strikes the cage 6 (FIG. 8) and spreads laterally, and rises upward along the lubricant filling nozzle 30. Moreover, when the said clearance gap is made larger than 0.7 mm, the force with which the lubricant with which it fills strikes the holder | retainer 6 (FIG. 8) spreads will become weak, and it will be in the state which rose up. Also in this case, the time required for the planarization treatment of the lubricant becomes long. Therefore, 0.7 mm is preferable.
[0026]
When the lubricant is filled in this way, the upper and lower nozzle fittings 28 of the lubricant filling device 11 are retracted up and down, and the rolling bearing W filled with the lubricant is held by the second work chuck 24B. It is conveyed to the lubricant leveling device 12. This conveyance is performed simultaneously with the conveyance of the rolling bearing W that has been aligned by the ball alignment unit 17 and the rolling bearing W that has been leveled by the lubricant leveling device 12 as described above.
[0027]
In the lubricant leveling device 12, the inner ring stator 44 is lowered by the driving of the lifting drive source 45 of the bearing support means 41 with respect to the rolling bearing W carried into the lubricant leveling unit 27, and the inner diameter surface of the inner ring 1. The inner ring 1 is fixed by press-fitting the tip to the inner ring 1. Next, the pair of outer ring rotation rollers 46 of the fine movement rotation imparting means 42 are pressed against the outer diameter surface of the outer ring 2 of the rolling bearing W by driving the pressure means 48. In this state, the fine rotation rotation imparting means drive source 47 is finely rotated in the forward and reverse directions, so that the rotation output is transmitted to the pair of outer ring rotating rollers 46 via the transmission mechanism 53, and the outer ring 2 of the rolling bearing W is moved in the forward and reverse directions. Rotate. A rotation amount A (FIG. 6A) of each forward / reverse fine movement rotation is, for example, ½ of the pitch P between the rolling elements 4 of the rolling bearing W. The radial load with which the outer ring rotating roller 46 is brought into contact is, for example, 2N.
[0028]
Thus, by rotating the rolling bearing W in the forward and reverse directions, the lubricant G (FIG. 6A) filled in the bearing inner space 3 of the rolling bearing W is flattened as shown in FIG. The The confirmation camera 54 monitors the flattened state 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 conveying means 13 and sent to the next process. In the case of a run-in failure, it is removed from the line by an appropriate unloading means (not shown) or manually.
[0029]
In the case where the lubricant is an uncured fixed lubricant, in the next step, an appearance inspection is performed on the lubricated and finished rolling bearing W, and the lubricant G is applied at a predetermined temperature and time by the firing device 59. Is solidified by heat. When the solidification of the lubricant G is completed and the rolling bearing W is cooled, the seal member 5 is inserted into the seal grooves 1a and 2a of the inner and outer rings 1 and 2 by a seal loading device (not shown) and undergoes an appearance inspection. The rolling bearing W encapsulating the lubricant is completed. Note that one of the seal grooves 1a and 2a is a groove for mounting the seal member 5, and the other groove is a groove in which the tip of the seal member 5 is in contact with or close to it.
[0030]
According to this lubricant leveling device 12, in order to finely rotate the outer ring 2 of the rolling bearing W in the forward and reverse directions in this way, the filled lubricant G spreads evenly over the entire bearing inner space 3, and the bearing rolling surface. The entire surface of 1b, 2b can be covered with the lubricant G. Further, even if the surface of the lubricant G rises, 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. Further, the lubricant G sealed in the bearing internal space 3 is prevented from sticking out and sticking to the seal grooves 1a and 2a, and the removal work is unnecessary.
[0031]
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, and provides fine rotation to the outer ring 2 by the outer ring rotating roller 46 pressed against the outer ring 2. Fine rotation can be given by the configuration. In particular, the bearing support means 41 is composed of a bearing support base 43 and a press-fit type inner ring stator 44, so that the rolling bearings W that are sequentially conveyed can be transferred to the outer ring rotating roller 46 without requiring an accurate positioning operation. On the other hand, it can be supported in a positioning state. Therefore, the rolling bearing W can be loaded into the bearing support means 41 only by being transported by the transfer type bearing transport means 13.
The fine movement rotation imparting means 47 sets the rotation amount A of each forward and reverse fine movement rotation to ½ or less of the rolling element pitch P of the rolling bearing W. If this range is set, the lubricant G is equalized. In addition, it is efficient for leveling the bulge of the lubricant surface.
[0032]
Further, since the lubricant leveling and sealing device includes the lubricant leveling device 11, the lubricant leveling device 12, and the bearing conveying means 13, the process from filling the lubricant to the leveling process is automatically continued. It can be processed and work efficiency can be improved.
[0033]
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 that supports the rolling bearing W filled with the lubricant G in a state in which the rolling bearing W is oriented in the vertical direction is connected to the third work chuck 24C of the bearing transport means 13. And a bearing support base 63 on which the inner ring 1 of the rolling bearing W is placed. The bearing support base 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 held and fixed by the third work chuck 24C. Further, in this lubricant leveling device 12A, the fine movement rotation imparting means 62 finely rotates the inner ring 1 of the rolling bearing W supported by the bearing support means 63 in the forward and reverse directions. That is, the fine movement rotation imparting means 62 is for fine movement rotation giving an inner ring engagement element 64 press-fitted into the inner ring 1 of the rolling bearing W on the bearing support base 63 from above and finely rotating the inner ring engagement element 64 forward and backward. The driving source 67 is included. The fine motion rotation imparting drive source 67 is lifted and lowered by a lift drive source 65 made of a cylinder.
[0034]
According to the lubricant leveling device 12A, the lubricant-filled rolling bearing W conveyed to the lubricant leveling unit 27 has its inner ring 1 mounted on the bearing support base 63 and the outer ring 2 has a third level. It is gripped by the work chuck 24C. In this supported state, the inner ring engagement element 64 of the fine movement rotation imparting means 62 descends from above and press-fits into the inner ring 1. In this state, the inner ring engagement element 64 is finely rotated in the forward and reverse directions by the driving of the fine movement rotation applying means drive source 67, whereby the inner ring 1 of the rolling bearing W is slightly rotated in the forward and reverse directions. Thereby, the lubricant G filled in the bearing inner space 3 of the rolling bearing W is smoothed.
[0035]
The solid lubricant used as the lubricant G is obtained by solidifying the mixture of the resin material and grease or lubricating oil by heat treatment as described above. For example, the following various lubricating compositions are used. it can.
(1) A lubricating composition obtained by heat-treating a liquid or semi-solid mixture obtained by mixing a high molecular weight polyethylene and a lubricating oil such as mineral oil.
(2) A lubricating composition obtained by heating a mixture of ultrahigh molecular weight polyethylene and a lubricating grease having a dropping point higher than the melting temperature of the polyethylene to the melting temperature to be solidified.
(3) Lubricating grease having a dropping point higher than the gel point of ultrahigh molecular weight polyolefin having an average molecular weight of about 1 × 10 6 to 5 × 10 6 is added to 5 to 99 wt% of the lubricating grease having a particle diameter of 1 to 100 μm. A lubricating composition in which 1 wt% is mixed and dispersed and held at a temperature equal to or higher than the gel point.
(4) The ultra high molecular weight polyolefin powder 95 to 95 wt% of lubricating grease having a dropping point higher than the gel point of the ultra high molecular weight polyolefin having an average molecular weight of about 1 × 10 6 to 5 × 10 6 and 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 bleeding are mixed and dispersed and held at a temperature equal to or higher than the gel point.
Note that the average molecular weight and the proportion of each composition in (3) and (4) are preferred examples, and may not necessarily be the above average molecular weight or proportion.
[0036]
【The invention's effect】
A lubricant leveling device for a rolling bearing according to the present invention comprises a bearing support means for supporting a rolling bearing in which a grease-like lubricant is filled in a bearing internal space between an inner ring and an outer ring in a state of being vertically oriented. A fine 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.The bearing support means supports the inner ring of the rolling bearing in a fixed state so that the outer ring can rotate, and the fine rotation imparting means rotates on the outer ring of the rolling bearing supported by the bearing support means. There are two outer ring rotating rollers in contact with each other, a finely rotating rotation driving source for finely rotating the outer ring rotating rollers forward and backward, and a pressure means for pressing the outer ring rotating rollers relative to the outer rings.Therefore, the filled lubricant can be evenly distributed throughout the interior space of the bearing, the protrusion can be eliminated, and the rise of the lubricant surface can be flattened.By supporting the inner ring in a fixed state and giving fine movement rotation by the outer ring rotating roller pressed against the outer ring, fine rotation can be given by the fine movement rotation applying means having a simple configuration.
  The lubricant leveling and sealing device of the present invention can automatically and continuously fill the lubricant in the bearing inner space and leveling the filled lubricant, and can equalize and lubricate the lubricant efficiently. The surface of the surface of the agent can be flattened.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a lubricant leveling 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 the lubricant enclosure device in the lubricant leveling device.
FIG. 3 is a longitudinal 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 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 the lubricant is sealed by the lubricant leveling and sealing device.
FIG. 8 is a cross-sectional view of a rolling bearing that is a target of lubricant leveling by the lubricant leveling 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 encapsulated with a lubricant 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 movement rotation applying means
43 ... Bearing support
44 ... Inner ring stator
46. Outer ring rotating roller
47. Driving source for imparting fine rotation
48 ... Pressurizing means
W ... Rolling bearing
G ... Lubricant

Claims (6)

Bearing support means for supporting a rolling bearing filled with grease-like lubricant in the bearing inner space between the inner ring and the outer ring in a vertically oriented position, and an inner ring of the rolling bearing supported by the bearing supporting means or e Bei and rOTARY imparting means for finely moving rotating the outer ring in forward and reverse,
The bearing support means supports the inner ring of the rolling bearing in a fixed state so that the outer ring can rotate, and the fine movement rotation imparting means is in contact with the outer ring of the rolling bearing supported by the bearing support means. A rolling bearing having a plurality of outer ring rotating rollers, a fine-rotation rotation driving source that finely rotates the outer ring rotating rollers forward and backward, and a pressurizing unit that presses the outer ring rotating rollers relative to the outer rings . Lubricant leveling device. The bearing support means includes a bearing support base on which an inner ring of a rolling bearing is mounted, and an inner ring stator whose tip is press-fitted into the inner ring of the rolling bearing on the bearing support base from above to fix the inner ring in a positioning state. The lubricant leveling device for a rolling bearing according to claim 1 . The rolling bearing lubricant leveling agent according to claim 1 or 2, wherein the fine movement rotation imparting means sets the amount of rotation of each forward and reverse fine movement rotation to ½ or less of the rolling element pitch of the rolling bearing. apparatus. Rolling bearings for supporting in the bearing support means, apparatus to if the rolling bearing lubricant according to any one of claims 1 to 3 is intended seal unmounted state in the seal rolling bearing. Lubricant of the rolling bearing to be supported by said bearing support means, apparatus to if the rolling bearing lubricant according to any one of claims 1 to 4 is of the uncured state of the solid lubricant. Lubricant filling device that fills the bearing internal space between the inner ring and outer ring of the rolling bearing with a grease-like lubricant, a lubrication leveling device, and the rolling bearing filled with the lubricant from the lubricant filling device described above 6. A rolling bearing lubricant comprising a bearing conveying means for conveying to the agent leveling device, wherein the lubricant leveling device is a lubricant leveling device for a rolling bearing according to any one of claims 1 to 5. Run-in sealing device.

Images