JP6639847B2 - Follower bearing lubrication system - Google Patents

Description

  The present invention relates to a follower bearing that can be used for various devices such as a machine tool, an industrial robot, an electronic component device, and an OA device, and a lubricating member that can be attached to and detached from a casing externally attached to the follower bearing. The present invention relates to a lubrication device for a follower bearing provided.

  2. Description of the Related Art Conventionally, follower bearings in which the outer periphery of an outer ring such as a cam follower and a roller follower has a follower surface are known. The follower bearing includes an outer race having a follower surface on the outer periphery and an outer raceway surface on the inner periphery, a shaft having an inner raceway surface facing the outer raceway surface, and a shaft between the outer raceway surface and the inner raceway surface. And rolling around. The shaft is provided with flange-shaped side members protruding in the outer radial direction on both end surfaces of the inner raceway surface, and the inner raceway surface of the shaft is formed by an annular groove formed in the shaft (for example, see Patent Document 1). 1).

  Further, as a follower bearing according to the present applicant, a bearing provided with a lubrication device is known. The follower bearing lubrication device 5P is housed in a casing 3P externally attached to the follower bearing 10P, as shown in FIG. In the follower bearing 10P, an outer ring 2P is rotatably mounted on a support shaft 1P which is a stud. The support shaft 1P has a flange portion 35P at an end. The outer ring 2P has an outer peripheral surface 16P formed on a follower surface 16P. Although not shown, the lubricating device 5P is accommodated in the casing 3P in a state where the plate spring is integrated with the lubricating member. The lubricating device 5P includes a leaf spring having a mountain-shaped cross section as an elastic member that presses the lubricating member against the outer ring 2P of the follower bearing 10P. The lubrication device 5P is accommodated in the casing 3P in a state where the leaf spring and the lubrication member are integrated. The lubricating member has a pair of protrusions that contact the outer ring 2P and a pair of wall surfaces on the side opposite to the side surface on which the protrusions are formed. The leaf spring is formed to have a chevron cross-sectional shape, and a pair of protruding pieces that contact the wall surface of the lubrication member are formed at the bottom of the chevron, and these protruding pieces are assembled so as to sandwich the pair of wall faces. (For example, see Patent Document 2).

JP 2010-101363 A JP 2011-58600 A

  However, in the follower bearing as described above, for example, when the lubricating member is replaced with a new one, the follower bearing fixed to the mating device and the lubricating device including the casing containing the lubricating member are once removed from the mating device. Therefore, unless the lubricating device is in a single state, the lubricating member in the casing cannot be replaced. In other words, in the conventional lubricating device for follower bearings, the lubricating device is externally attached to the follower device. However, when the follower device is installed in the mating device, the lubricating member constituting the lubricating device may be attached to the casing. However, there has been a problem that it cannot be removed from the casing or replaced with a new lubricating member.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems. For a follower bearing such as a cam follower or a roller follower , a lubricating device is housed in a casing comprising a case externally attached to the follower bearing and a lid member thereof , without removing the casing of the case from the follower bearing, or attached Chi distribution設即only case lubricating member disposed in the casing of the case, it can be inserted in and removed from the case, thereby facilitating the only lubricating member in a new lubricating member It is an object of the present invention to provide a lubricating device for a follower bearing characterized in that the lubricating device can be replaced with another.

According to the present invention, a lubricating member for supplying lubricant to the outer ring is accommodated in a follower bearing having a support shaft having an attachment portion and an outer ring rotatably mounted on the support shaft via a roller. A lubricating device for a follower bearing, comprising a casing having a housing chamber for externally attaching to the follower bearing,
The casing includes a case provided with the storage chamber and covering a part of the outside of the outer ring, and a lid member openably and closably attached to the case to close an opening of the storage chamber formed in the case. Has been
The case has a main body in which the housing chamber for forming the lubricating member is formed so as to cover the outer race, and an insertion hole formed integrally with one end of the main body to fit the support shaft. Ring part,
Without removing the casing of the casing from the follower bearing, and characterized in that it is mounted removably disposed in the housing chamber the lubricating member through the opening of the case is opened the lid member of the casing And a lubricating device for a follower bearing.

  Further, the lubricating member includes a pair of lubricating portions spaced apart in a circumferential direction of the outer ring and in contact with each other along the entire axial direction, and the lubricating member has the lubricating portion elastically attached to an outer peripheral surface of the outer ring. A spring member to be brought into abutment is attached. Further, the spring member is positioned in the casing by being engaged with a positioning recess formed in the upper portion of the casing so as to extend in the axial direction.

  Further, the lubricating member has a latching support portion on both sides in the axial direction, and the latching support portion is hooked on a latching step formed to extend in the axial direction on both inner sides of the case. It is stopped and installed in the accommodation room of the case. Further, the lubricating member is formed of a porous molded body impregnated with the lubricant.

  The opening formed in the case is formed at an axial end face or an upper portion of the case.

  The lid member is hingedly attached to one end of the case by a hinge to open and close the opening formed in the case, and the other end is connected to a locking projection provided on the case. It has an engagement hole to be stopped. Alternatively, the lid member is formed separately from the case, and is locked by locking projections provided at both ends of the case to open and close the opening formed in the case. Engagement holes are provided at both ends.

The support shaft, in which the outer race and the casing are provided, is inserted into a mounting hole formed in a fixing member, and a nut is screwed into a male screw portion forming the mounting portion of the support shaft. Then, the follower bearing is fixed to the fixing member. Furthermore, the outer ring, rolling on the track surface of a track member, the fixing member is for movement with the rolling of the outer ring.

  The lubricating device for a follower bearing according to the present invention has a structure in which a lubricating device in which a lubricating member is disposed in a casing is externally attached to a follower bearing such as a cam follower as described above. When the casing is composed of a case and a lid member that closes the opening of the case, and the follower bearing itself is fixed to the fixing member, The casing constituting the lubricating device can be fixed to the fixed member together with the follower bearing, and when the casing is mounted on the follower bearing, the cover member is operated to open the housing of the case, and the casing is arranged in the case. Remove the installed lubrication member, install or install the lubrication member in the case, or remove the worn lubrication member. It can be easily replaced Shii lubricating member.

It is a front view showing one embodiment of a lubrication device of a follower bearing by this invention. It is sectional drawing which shows the lubricating device of a follower bearing in the AA cross section shown in FIG. FIG. 2 is a perspective view showing the follower bearing in a state where a lid member of a casing externally attached to the follower bearing is opened in the follower bearing of FIG. 1. FIG. 2 is a perspective view showing the follower bearing in a state where a cover member of a casing externally attached to the follower bearing in the follower bearing of FIG. 1 is closed. FIG. 2 is a partial cross-sectional view showing a lubricating device for a follower bearing in a state where the follower bearing of FIG. 1 is fixed to a fixed member and an outer ring is installed on a track surface of a mating member. FIG. 2 is a perspective view showing a lubricating member housed in a casing externally attached to the follower bearing of FIG. 1. FIG. 9 is a perspective view showing another embodiment in which the case forming the casing is separated from the lid member in the lubricating device for the follower bearing according to the present invention. FIG. 8 is a perspective view showing a lid member constituting a casing in the follower bearing of FIG. 7. FIG. 9 is a perspective view showing another embodiment of the lubricating device for a follower bearing according to the present invention. FIG. 9 is a perspective view showing still another embodiment of a lubricating device for a follower bearing according to the present invention. It is a top view which shows the lubricating device of the follower bearing of FIG. It is a front view showing an example of the conventional lubrication device of a follower bearing.

Hereinafter, an embodiment of a lubricating device for a follower bearing according to the present invention will be described with reference to the drawings.
An embodiment of a lubricating device for a follower bearing according to the present invention will be described with reference to FIGS. In the lubricating device for a follower bearing according to the present invention, the follower bearing 10 is a cam follower or a roller follower, and in this embodiment, the support shaft 1, which is generally a stud provided with a mounting portion 13 such as a male screw portion 1S, and a support shaft. An outer ring 2 is rotatably attached to the shaft 1 via a roller 4 such as a needle roller. In the follower bearing lubricating apparatus, a casing 3 having a housing chamber 6 for housing a lubricating member 15 for supplying lubricant to the outer ring 2 is externally attached to the follower bearing 10. . The follower bearing 10 is provided with a flange 35 at one end and a support shaft 1 having a male screw portion 1S of a mounting member 13 formed at the other end, and an outer ring 2 rotatably fitted and mounted on the support shaft 1. A plurality of needle rollers 4 interposed between the outer ring 2 and the roller 4, a retainer 37 for retaining the roller 4, and the flange 37, which is in contact with the retainer 37 on the side opposite to the flange 35, is inserted into the support shaft 1. It is composed of a ring-shaped side plate 34. The follower bearing 10 is incorporated in various devices, for example, as shown in FIG. In the follower bearing 10, the support shaft 1 is inserted into a mounting hole 41 formed in the fixing member 22, and a nut 28 is screwed into a male screw portion 1 </ b> S formed in the support shaft 1 and fastened to fix it to the fixing member 22. Have been. The fixing member 22 has a boss portion 36 formed around the mounting hole 41. The outer ring 2 of the follower bearing 10 is rotatably mounted on a track surface 31 of a track member 30 which is a mating member. At the end of the support shaft 1, a male screw portion 1S is provided at one end, and at the end of the support shaft 1 opposite to the male screw portion 1S, the support shaft 1 is tightened and fixed using a hexagonal wrench key. Hexagon hole 27 is formed. A grease nipple 43 for supplying lubricant to the roller 4 of the follower bearing 10 is disposed behind the hexagonal hole 27. A greasing passage 42 for greasing the roller 4 of the follower bearing 10 is formed further behind the grease nipple 43.

  The lubricating device for a follower bearing according to the present invention generally includes a casing 3 externally attached to the follower bearing 10, a lubricating member 15 housed in the casing 3, and a spring member 17 for elastically bringing the lubricating member 15 into contact with the outer ring 2. It is composed of The casing 3 has a housing chamber 6 for a lubricating member 15 and covers a part of the outside of the outer ring 2, and a lid member that is openably and closably attached to the case 7 to close an opening 9 formed in the case 7. The lubricating member 15 is installed in the housing chamber 6 of the case 7 so as to be freely taken in and out. The lubricating member 15 constituting the lubricating device 5 is characterized in that it is detachably mounted on the case 7 constituting the casing 3 of the lubricating device 5 through the opening 9 in the housing chamber 6. The case 7 has a main body 11 in which a housing chamber 6 for housing the lubricating member 15 is formed so as to cover the outer ring 2, and an insertion hole formed integrally with one end of the main body 11 to insert the support shaft 1. The ring unit 25 includes the ring unit 25. In this embodiment, the case 7 is formed from a rear portion 46 having an upper portion 23, both side portions 45, and a ring portion 25. An opening 9 is formed at the front of the case 7, and the opening 9 is configured to be closed by a lid member 8. The opening 9 formed in the case 7 is formed on one end face 24 in the axial direction of the case 7. Further, a V-groove-shaped positioning recess 32 extending in the axial direction is formed in the center of the upper portion 23 of the case 7 in order to position the spring member 17 in the casing 3. In the case 7, the lubricating device 5 is disposed in the storage chamber 6, and the lubricating device 5 is stably installed in the storage chamber 6. , And a pair of step-shaped latching step portions 33 are formed. Further, the lid member 8 constituting the casing 3 is rotatably attached to one end of the case 7 by a hinge 26 to seal the opening 9 formed in the axial end face 24 of the case 7, and the other end of the case 7 is closed by the hinge 26. 7 is provided with an engagement hole 19 that is locked by the locking projection 18 provided on the lock 7.

  In this embodiment, the lubricating device 5 includes a lubricating member 15 impregnated with a lubricant, a casing 3 in which the lubricating member 15 is disposed, and a leaf spring-shaped spring member 17 attached to the lubricating member 15. . The lubricating member 15 is composed of a pair of lubricating portions 14 that are spaced apart in the width direction and extend in the axial direction in a double-hull shape, and a linking portion 40 that links the lubricating portions 14 to an integral structure. The lubricating member 15 is formed with a concave groove 39 extending in the axial direction, corresponding to the portion where the oil supply portion 14 is formed. The lubricating member 15 has a widthwise end protruding and extending toward the end surface along the concave groove 39, and is mounted on the pair of latching steps 33 of the case 7 to support the lubricating member 15 in the case 7. And a latching support portion 38 to be provided. In the positioning recess 32 formed in the case 7, a spring member 17 formed of a ridge-shaped leaf spring is locked at an axial center ridge, whereby the lubricating member 15 is positioned in the case 7. It is arranged. The lubricating portion 14 of the lubricating member 15 is elastically deformed and brought into contact with the outer peripheral surface 16 of the outer ring 2 by a spring member 17, and is configured to contact the outer peripheral surface 16 of the outer ring 2 to supply oil. In other words, the lubricating member 15 includes a pair of lubricating portions 14 spaced apart in the circumferential direction of the outer ring 2 and in contact with each other along the entire axial direction. Further, the lubricating member 15 is formed of a porous molded body impregnated with a lubricant. The porous molded body impregnated with the lubricant is, for example, a sintered resin formed by compacting high-molecular-weight synthetic resin fine particles in a compacted state, and is formed in a space in which the synthetic resin fine particles communicate with each other, that is, an open pore. The open pores are shaped so as to be impregnated with a lubricant.

  Further, the follower bearing 10 is configured such that the outer ring 2 is rotatable and moves following the displacement of the track surface 31 of the track member 30 which is the mating member. In order to fix the follower bearing 10 to the fixing member 22, the support shaft 1 of the follower bearing 10 is passed through the insertion hole 12 formed in the ring portion 25 of the case 7, and then the mounting hole 41 formed in the fixing member 22. Then, the ring 25 is positioned on the boss 36 around the mounting hole 41. Therefore, the washer 29 is applied to the surface of the fixing member 22 through the washer 29 on the support shaft 1, and then the nut 28 is screwed into the male screw portion 1 </ b> S of the support shaft 1 and fastened. In this state, the case 7 is fixed to the fixing member 22 together with the follower bearing 10. Normally, the lubricating device 5 is disposed in the case 7 prior to setting the casing 3 on the follower bearing 10, but may be disposed after the casing 3 is set on the follower bearing 10. That is, in the follower bearing 10, the support shaft 1 on which the outer ring 2, the casing 3 and the casing 3 are disposed is inserted into the mounting hole 41 formed in the fixing member 22 to constitute the mounting portion 13 of the support shaft 1. The nut 28 is screwed and fastened to the male screw portion 1s to be fixed, whereby the follower bearing 10 is fixed to the fixing member 22.

  Next, with reference to FIGS. 7 and 8, another embodiment of a lubricating device for a follower bearing according to the present invention will be described. 7 and 8, members having the same functions as those of the various members of the lubricating device for the follower bearing shown in FIGS. 1 to 6 are denoted by the same reference numerals, and description thereof will be omitted. The lubricating device for a follower bearing according to the present invention is formed in a structure in which the case 7A and the lid member 8A constituting the casing 3 are separately separated. The lid member 8A has, at both ends, engagement holes 19 that are locked by locking projections 18 provided at both ends of the case 7A to open and close the opening 9 formed in the case 7A. The case 7A is formed of a rear part 46 having an upper part 23, both side parts 45, and a ring part 25. The front part of the case 7A is formed in an opening 9, and the opening 9 is configured to be closed by a lid member 8A. In order to arrange the lubrication device 5 in the accommodation room 6 of the case 7A, the lid member 8A is removed from the case 7A, the opening 9 is opened, and the lubrication device 5 is inserted into the accommodation room 6 and arranged.

  Still another embodiment of the lubricating device for follower bearing according to the present invention will be described with reference to FIG. In FIG. 9, members having the same functions as the various members of the lubricating device for the follower bearing shown in FIGS. 1 to 6 are denoted by the same reference numerals, and the description thereof will be omitted. In the lubricating device for a follower bearing according to the present invention, the opening 9 formed in the case 7B is formed on the upper surface of the case 7B. The opening 9 of the case 7B is formed so as to be closed by the lid member 8B. One end of the lid member 8B is rotatably attached to a side portion of the case 7B by a hinge 26, and has an engagement hole 21 at the other end. The side of the case 7B is provided with a locking projection 20 with which the engaging hole 21 of the lid member 8B engages. The lubricating device 5 can be disposed from above by opening the lid member 8B provided at the upper part of the housing chamber 6 of the case 7B. Of course, the case 7B is also provided with a latch guide portion, and the lubricating device 5 is placed on the latch guide portion of the case 7B and disposed in the storage chamber 6 of the case 7B.

  Another embodiment of the lubricating device for a follower bearing according to the present invention will be described with reference to FIGS. 10 and 11, members having the same functions as those of the various members of the lubricating device for the follower bearing shown in FIGS. 1 to 6 are denoted by the same reference numerals, and description thereof will be omitted. In the lubricating device for a follower bearing according to the present invention, the case 7C and the lid member 8C are integrally formed by a kind of hinge 26C made of an elastically deformable thin member. The lid member 8C has an engagement hole 19, and the engagement hole 19 of the lid member 8C is formed on the front part of the case 7C by engaging with the locking projection 18 provided on the case 7C. The opening 9 is configured to be closed. In other words, the case C, the lid member 8C, and the hinge 26C are integrally formed.

  The lubricating device for a follower bearing according to the present invention is used by being incorporated in various devices such as a machine tool, an industrial robot, an electronic component device, and an OA device.

DESCRIPTION OF SYMBOLS 1 Support shaft 1S male screw 2 Outer ring 3 Casing 4 Roller 5 Lubricating device 6 Storage chamber 7, 7A, 7B, 7C Case 8, 8A, 8B, 8C Lid member 9 Opening 10 Follower bearing 11 Main body 12 Insertion hole 13 Mounting part 14 Lubrication part 15 Lubrication member 16 Outer peripheral surface 17 Spring member 18, 20 Locking convex part 19, 21 Engagement hole part 23 Upper part 24 End surface 25 Ring part 26 Hinge 28 Nut 30 Track member 31 Track surface 32 Positioning concave part 33 Locking step 33 38 Latching support part 41 Mounting hole

Claims (10)

For a support shaft having an attachment portion and a follower bearing having an outer ring relatively rotatably attached to the support shaft via a roller, a housing chamber for housing a lubricating member for supplying lubricant to the outer ring is provided. A follower bearing lubrication device, comprising a casing provided externally to the follower bearing;
The casing includes a case provided with the storage chamber and covering a part of the outside of the outer ring, and a lid member openably and closably attached to the case to close an opening of the storage chamber formed in the case. Has been
The case has a main body in which the housing chamber for forming the lubricating member is formed so as to cover the outer race, and an insertion hole formed integrally with one end of the main body to fit the support shaft. Ring part,
Without removing the casing of the casing from the follower bearing, and characterized in that it is mounted removably disposed in the housing chamber the lubricating member through the opening of the case is opened the lid member of the casing Follower bearing lubrication device. The lubricating member includes a pair of lubricating portions that are spaced apart in the circumferential direction of the outer ring and are in contact with each other along the entire axial direction, and the lubricating member elastically attaches the lubricating portion to the outer peripheral surface of the outer ring. The follower bearing lubricating device according to claim 1, wherein a spring member to be abutted is attached. 3. The follower bearing according to claim 2 , wherein the spring member is disposed in the casing so as to be engaged with a positioning recess formed in the upper portion of the casing so as to extend in the axial direction. Lubrication device. The lubricating member is provided with latching support portions on both sides in the axial direction, and the latching support portions are latched on latching step portions formed on both inner sides of the case so as to extend in the axial direction. The lubricating device for a follower bearing according to any one of claims 1 to 3 , wherein the lubricating device is installed in the housing chamber of the case. The lubricating device for a follower bearing according to any one of claims 1 to 4 , wherein the lubricating member is formed of a porous molded body impregnated with the lubricant. The lubricating device for a follower bearing according to any one of claims 1 to 5 , wherein the opening formed in the case is formed at an axial end surface or an upper portion of the case. The lid member is hingedly attached to one end of the case by a hinge to open and close the opening formed in the case, and the other end is locked by a locking projection provided on the case. The lubricating device for a follower bearing according to any one of claims 1 to 6 , further comprising an engagement hole portion. The lid member is formed separately from the case, and is engaged with locking projections provided at both ends of the case to open and close the opening formed in the case. The lubricating device for a follower bearing according to any one of claims 1 to 6 , wherein holes are provided at both ends. The support shaft on which the outer race and the casing are disposed is inserted into a mounting hole formed in a fixing member, and a nut is screwed into a male screw portion constituting the mounting portion of the support shaft. The lubricating device for a follower bearing according to any one of claims 1 to 8 , wherein the follower bearing is fixed to the fixing member. The lubricating device for a follower bearing according to claim 9 , wherein the outer ring rolls on a track surface of a track member, and the fixed member moves with the rolling of the outer ring.

Images