JP2009008210A - Bearing device, bearing device adapter, and bearing device cover - Google Patents

Abstract

A bearing device capable of discharging a lubricant leaking from a bearing to a predetermined discharge place without fouling the peripheral portion of the bearing device and applicable to a device already provided with the bearing device at a low cost. provide.
In a bearing device 10 attached to a conveyor installation target having a rotating shaft 101 and rotatably supporting the rotating shaft 101 by a rolling bearing 21, a main body 20 on which the rolling bearing 21 is disposed, and a side surface of the main body 20 are provided. An adapter unit 30 attached to the main body 20 so as to cover the adapter 20, the adapter member 30 facing the gaps S <b> 1 to S <b> 3 formed on the side surface of the main body 20, and the side surface of the main body 20 and the adapter unit 30. A recess 31 provided so that the grease storage chamber 11 is formed therebetween, a discharge hole 33 communicating the grease storage chamber 11 with the outside, and a through hole 32 provided in the recess 31 through which the rotary shaft 101 passes. And an oil seal 36 disposed in the through hole 32.
[Selection] Figure 3

Description

  The present invention relates to a bearing device including a bearing to which a lubricant is supplied at a predetermined cycle, an adapter for the bearing device, and a cover for the bearing device.

  2. Description of the Related Art Conventionally, a grease lubrication type bearing device that obtains lubrication with a lubricant such as grease is known. In this grease lubrication type bearing device, the grease of the lubricant gradually leaks from the gaps between the respective parts of the bearing, and therefore it is necessary to periodically lubricate the grease. Further, in the grease lubrication type bearing device, there is a problem that if the grease leaking from the gaps of the respective portions of the bearing is not properly treated, the grease adheres to the peripheral portion of the bearing device and the peripheral portion is soiled. This problem does not occur in non-greased bearing devices that do not require lubrication of lubricants. However, non-greased bearing devices are less durable than grease lubricated bearing devices, so they can be used for a short period of time. It is necessary to exchange the bearing device between them.

  As a grease lubrication type bearing device, a dust cover is provided so as to cover a side end face of a pulley rotatably supported by a grease lubrication type bearing, and the outside air side and the inside of the bearing are communicated on the periphery of the dust cover. It is known that a through hole is provided and grease in the bearing is discharged from the through hole (see Patent Document 1). Further, a bearing device is known in which a grease cover is provided on a rotating shaft, and grease leaked from the bearing is captured and stored by a grease receiving portion of the grease cover (see Patent Document 2). A space is formed between the two labyrinth seals provided on the side of the housing to hold the grease leaking from the bearing, and the grease is discharged from a drain hole formed in the housing so that the space communicates with the outside. A bearing device is known (see Patent Document 3).

Japanese Patent Laid-Open No. 10-169759 Japanese Utility Model Publication No. 62-77399 JP 2006-105297 A

  In the grease-lubricated bearing pulley of Patent Document 1, grease can be discharged from the through hole provided in the dust cover, but a specific method for treating the grease discharged from the through hole is not disclosed. Therefore, when a pulley rotates, it will fly and there exists a possibility of fouling a peripheral part. In the bearing device of Patent Document 2, it is necessary to periodically remove the grease accumulated in the grease receiving portion. In the apparatus of Patent Document 3, grease can be discharged from the drain hole without fouling the peripheral part, but it is necessary to provide a part for arranging two labyrinth seals on the side part and a drain hole in the housing. Therefore, when this bearing device is applied to a device that already has a bearing device, it is necessary to modify the existing bearing device or replace the bearing device itself. In this case, the cost increases.

  Therefore, the present invention can discharge the lubricant leaked from the bearing to the predetermined discharge place without fouling the peripheral portion of the bearing device, and can be applied to a device already provided with the bearing device at a low cost. An object of the present invention is to provide a bearing device, a bearing device adapter, and a bearing device cover.

  A first bearing device of the present invention is attached to an installation object (100) having a rotating shaft (101), and the rotating shaft can be freely rotated by a bearing (21) to which a lubricant is supplied at a predetermined interval. The supporting bearing device (10) includes a main body (20) on which the bearing is disposed, and an adapter member (30) attached to a side surface of the main body, and the adapter member is formed on a side surface of the main body. A recess (31) provided so as to face the gaps (S1 to S3) through which the lubricant leaks and to form a lubricant storage space (11) between the side surface of the main body and the adapter member. A lubricant discharge hole (33) communicating the lubricant storage space with the outside, a through hole (32) provided in the recess and through which the rotating shaft passes, and the through hole disposed in the through hole. Lubricant to the outside through the hole A seal member for preventing the output (36), by providing, for solving the above problems.

  According to the first bearing device of the present invention, even if the lubricant leaks from the bearing, the lubricant is stored in the lubricant storage space, and then the lubricant is discharged to the outside through the lubricant discharge hole. Can do. Therefore, for example, by connecting a hose that guides the lubricant to the predetermined discharge location in the lubricant discharge hole, the lubricant leaked from the bearing is discharged to the predetermined discharge location without fouling the periphery of the bearing device. Can be made. Even if a bearing device is already provided, the existing bearing device can be changed to the first bearing device of the present invention by attaching the adapter member of the first bearing device of the present invention to the bearing device. There is no need to modify or replace existing bearing devices. Therefore, the present invention can be applied at low cost to equipment already provided with a bearing device.

  In one form of the first bearing device of the present invention, the adapter member is attached to one side surface of the main body and the end (101a) of the rotating shaft is exposed on the other side surface of the main body. A cover member (24) formed of a transparent material is attached to the main body so as to cover the end portion of the rotating shaft and the gaps (S1 to S3) formed around the end portion and leaking the lubricating oil. Furthermore, you may provide. In this case, even if the lubricant leaks from the end of the rotating shaft, the cover member can prevent the lubricant from scattering. Further, since the cover member is made of a transparent material, the amount of lubricant leaked into the cover member can be grasped without removing the cover member. Therefore, the lubricant in the cover member can be removed before the lubricant overflows from the cover member. Accordingly, it is possible to prevent the peripheral portion of the bearing device from being damaged. Further, since it is not necessary to remove the cover member during the inspection of the lubricant, maintenance work can be reduced.

  The “transparent material” in the present invention is not limited to a colorless material. If it is possible to see what is arranged on the opposite side through the material, it may be colored in white, blue, green or the like.

  The second bearing device of the present invention rotatably supports the rotating shaft (101) by a bearing (21) to which a lubricant is supplied at a predetermined interval, and an end portion (101a) of the rotating shaft on a side surface. Is exposed to the side of the bearing device so as to cover the end portion of the rotating shaft and the gaps (S1 to S3) formed around the end portion and leaking the lubricating oil, By providing the cover member (24) formed of a transparent material, the above-described problems are solved.

  According to the second bearing device of the present invention, the cover member can prevent the lubricant from scattering from the end of the rotating shaft. Further, since the amount of the lubricant leaking into the cover member can be grasped without removing the cover member, the maintenance work can be reduced and the lubricant can be removed before the lubricant overflows from the cover member. Therefore, it is possible to prevent the peripheral portion of the bearing device from being damaged. Furthermore, since the existing bearing device can be changed to the second bearing device of the present invention by providing a cover member on the bearing device already attached to the device, the device already provided with the bearing device can be manufactured at low cost. Can be applied.

  The adapter for a bearing device of the present invention is applied to a bearing device (10) that rotatably supports a rotating shaft (101) by a bearing (21) to which a lubricant is supplied at a predetermined interval, and supports the bearing. In the bearing device adapter (30) attached to the side surface of the main body (20) of the bearing device to be opposed to the gaps (S1 to S3) formed on the side surface of the main body and through which the lubricant leaks, A recess (31) provided so that a lubricant storage space (11) is formed between a side surface of the main body and the adapter for the bearing device, and a lubricant discharge hole (communication between the lubricant storage space and the outside) 33), a through hole (32) provided in the recess and through which the rotating shaft passes, and a seal member (36) disposed in the through hole and preventing leakage of the lubricant to the outside through the through hole. ) And To solve the problems mentioned.

  According to the adapter for a bearing device of the present invention, like the first bearing device of the present invention described above, the lubricant leaking from the bearing is discharged to a predetermined discharge place without fouling the peripheral portion of the bearing device. be able to. Moreover, since the effect similar to the 1st bearing apparatus of this invention can be acquired by attaching the adapter for bearing apparatuses of this invention to the existing bearing apparatus, the cost concerning modification of a bearing apparatus etc. is suppressed. Can do.

  The bearing device cover of the present invention rotatably supports the rotating shaft (101) by a bearing (21) to which a lubricant is supplied at a predetermined interval, and the end (101a) of the rotating shaft on a side surface. Is applied to the bearing device (10) where is exposed, and the bearing device is formed so as to cover at least the end portion of the rotating shaft and the gaps (S1 to S3) formed around the end portion and leaking the lubricating oil. In the bearing device cover (24) to be attached, the bearing device cover is formed of a transparent material, thereby solving the above-described problems.

  According to the bearing device cover of the present invention, as in the above-described second bearing device of the present invention, the lubricant is prevented from scattering from the end of the rotating shaft and the lubricant is prevented from overflowing from the cover. it can. Therefore, it is possible to prevent the peripheral portion of the bearing device from being damaged. Moreover, since the same effect as the 2nd bearing apparatus of this invention can be acquired by attaching the cover of this invention to the existing bearing apparatus, the cost concerning modification of a bearing apparatus etc. can be held down.

  In addition, in the above description, in order to make an understanding of this invention easy, the reference sign of the accompanying drawing was attached in parenthesis, but this invention is not limited to the form of illustration by it.

  As described above, according to the present invention, the lubricant that has leaked from the bearing can be discharged to a predetermined discharge location without fouling the peripheral portion of the bearing device. Further, by adding an adapter or a cover to the existing bearing device, the same effect as the bearing device of the present invention can be obtained, so that it can be applied to a device already provided with the bearing device at a low cost.

  A bearing device according to an embodiment of the present invention will be described with reference to FIGS. First, an outline of the bearing device 10 will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view of the bearing device 10. FIG. 2 is a view showing the bearing device 10 in an exploded state. This bearing device 10 is attached to a conveyor 100 that conveys articles with bolts 102, and supports a rotating shaft 101 (see FIG. 2) of the conveyor 100 so as to be rotatable to the left and right. Therefore, the conveyor 100 corresponds to the installation target of the present invention. The bearing device 10 includes a main body 20 and an adapter portion 30 as an adapter member. As shown in FIG. 1, the bearing device 10 is attached to the conveyor 100 with bolts 102 so that the adapter unit 30 is disposed on the conveyor 100 side.

  Next, the main body 20 and the adapter unit 30 will be described with reference to FIGS. FIG. 3 is a view showing a cross section of the bearing device 10. 4 is a view of the main body 20 as viewed from the left side of FIG. 2, and FIG. 5 is a view of the adapter unit 30 as viewed from the right side of FIG. As shown in FIG. 3, a rolling bearing 21 is provided in the main body 20 so as to support the rotating shaft 101 so as to be rotatable left and right. The rolling bearing 21 is a known bearing in which a ball 21c as a rolling element is provided between an inner ring 21a and an outer ring 21b so as to be able to roll. Therefore, detailed description is omitted. As shown in FIG. 3, the outer ring 21b is provided with a through hole 21d penetrating the outer ring 21b. The inner ring 21a is provided with a grease supply unit 21e so that grease as a lubricant can be directly supplied between the rotating shaft 101 and the inner ring 21a. As is well known, grease gradually leaks from the gaps between the respective parts of the rolling bearing 21, so that it is necessary to periodically grease the grease at a predetermined cycle. Therefore, the main body 20 is provided with a grease introduction hole 22 that guides grease to the rolling bearing 21, and a grease nipple 23 is attached to the grease introduction hole 22. The grease is supplied from the grease nipple 23 and guided to the rolling bearing 21 through the grease introduction hole 22. Thereafter, the grease is guided between the inner ring 21a and the outer ring 21b through the through hole 21d. As shown in FIG. 3, the rotating shaft 101 is supported by the bearing device 10 so that the end portion 101a is exposed. The main body 20 includes an end portion 101a of the rotating shaft 101 and a gap formed around the end portion to allow grease to leak, for example, a gap S1 between each portion of the rolling bearing 21 and a gap between the rolling bearing 21 and the rotating shaft 101. A cover 24 as a cover member is attached so as to cover S <b> 2 and the gap S <b> 3 between the rolling bearing 21 and the main body 20. The cover 24 is made of a transparent material such as polyethylene terephthalate (PET) or acrylic resin.

  As shown in FIGS. 1 and 3, the adapter unit 30 has a size that covers the side surface of the main body 20 on the conveyor 100 side. The adapter portion 30 is formed with a recess 31 on the surface combined with the main body 20, and the recess 31 is provided with a through hole 32 through which the rotating shaft 101 passes. As shown in FIG. 3, the recess 31 is formed on the side surface of the main body 20 so that grease leaks out, for example, a gap S <b> 1 between each part of the rolling bearing 21, a gap S <b> 2 between the rolling bearing 21 and the rotating shaft 101, and It is formed in a size that covers all the gap S <b> 3 between the rolling bearing 21 and the main body 20. In addition, what is necessary is just to set the depth of the recessed part 31 suitably according to the quantity etc. of the grease which leaks from each clearance gap S1-S3, for example. The recess 31 is provided with a discharge hole 33 as a lubricant discharge hole that communicates the outside of the adapter unit 30 with the recess 31. As shown in FIGS. 1 and 5, one end of a hose 35 is connected to the discharge hole 33 via a joint 34. The other end of the hose 35 is disposed at a predetermined discharge place where the grease is discharged. A step 32 a is provided in the through hole 32, and an oil seal 36 is provided as a seal member in the step 32 a. The oil seal 36 is used in a general bearing device, and may be a well-known oil seal that contacts the outer periphery of the rotating shaft 101 and suppresses leakage of grease from the recess 31 to the outside.

  As shown in FIG. 3, by combining the main body 20 and the adapter portion 30, the grease storage chamber 11 as a lubricant storage space is formed in the bearing device 10 by the side surface 20 b of the main body 20 and the concave portion 31 of the adapter portion 30. Can be formed. Also, as shown in FIG. 3, the grease storage portion 12 is formed between the main body 20 and the cover 24 by attaching the cover 24 to the main body 20.

  Next, the movement of the grease in the bearing device 10 will be described with reference to FIG. As described above, grease is periodically supplied from the grease nipple 23 to the rolling bearing 21. The grease supplied to the rolling bearing 21 gradually leaks from the gaps S <b> 1 to S <b> 3 formed on the side surface of the main body 20. The leaked grease is stored in the grease storage chamber 11 or the grease storage unit 12. Therefore, it is possible to prevent the grease leaked from the rolling bearing 21 from being scattered around the bearing device 10 or falling below the bearing device 10.

  As described above, since the oil seal 36 is provided in the through hole 32 of the adapter portion 30, it is possible to suppress leakage of grease from the grease storage chamber 11 to the outside through the through hole 32 by the oil seal 36. . Therefore, the grease stored in the grease storage chamber 11 is then guided to a predetermined discharge location via the discharge hole 33 and the hose 35. Therefore, the grease leaked from the rolling bearing 21 can be discharged to a predetermined discharge place without contaminating the peripheral portion of the bearing device 10.

  On the other hand, the grease discharged to the grease storage unit 12 is periodically removed during maintenance before overflowing from the grease storage unit 12. Since the amount of grease discharged to the grease storage unit 12 is smaller than the amount of grease discharged to the grease storage chamber 11, it can be dealt with by periodically removing it during maintenance in this way. Further, since the cover 24 is formed of a transparent material, it is possible to grasp how much grease is discharged to the grease storage unit 12 without removing the cover 24. Therefore, the grease can be appropriately removed before overflowing from the cover 24. Therefore, it is possible to prevent the peripheral portion of the bearing device 10 from being damaged. In addition, since the inside can be monitored without removing the cover 24, maintenance work can be reduced.

  As the main body 20 of the bearing device 10, a single unit that is generally used as a bearing device can be used as it is. That is, it can change to the bearing apparatus of this invention by attaching the adapter part 30 and the cover 24 to the bearing apparatus generally used alone. Therefore, even if only the portion of the main body 20 is already provided as a bearing device on the conveyor, the adapter device 30 and the cover 24 can be added to the main body 20 without remodeling the main body 20, and the bearing device of the present invention can be changed. . Accordingly, even if a bearing device is already provided on the conveyor, the bearing device can be changed to the bearing device of the present invention at low cost. In addition, the steel cover may be attached to the main body 20 already provided as a bearing device. Since the steel cover cannot be monitored without removing the cover, in this case, the steel cover is replaced with the transparent cover 24 of the present invention. Thereby, the inside can be monitored without removing the cover 24.

  Note that only one of the adapter unit 30 or the transparent cover 24 may be provided according to the shape of the main body 20 or the like. That is, in the bearing device of the present invention, only the adapter unit 30 may be provided on the main body 20, or only the transparent cover 24 may be provided on the main body 20. For example, in the case where most of the grease supplied to the rolling bearing 21 leaks from the gap on the side surface of the conveyor 100 among the side surfaces of the main body 20, the contamination of the peripheral portion of the bearing device 10 can be obtained by adding only the adapter portion 30. It is possible to discharge the grease leaked from the rolling bearing 21 to a predetermined discharge place while preventing the above. On the other hand, in the case where most of the grease supplied to the rolling bearing 21 leaks from the gap between the side surfaces of the main body 20 where the end portion 101a of the rotating shaft 101 is exposed, only the transparent cover 24 is added, Alternatively, when a steel cover is already attached, the steel cover is replaced with a transparent cover 24. Thereby, the stain | pollution | contamination of the peripheral part of the bearing apparatus 10 can be prevented.

  The present invention is not limited to the form described above, and may be implemented in various forms. For example, equipment to which the bearing device of the present invention is applied is not limited to a conveyor. You may apply the bearing apparatus of this invention to the various apparatuses which have a rotating shaft. In the embodiment described above, grease is supplied from the grease nipple to the rolling bearing. However, an automatic greasing device that periodically supplies a predetermined amount of grease may be connected to the grease introduction of the main body instead of the grease nipple.

The perspective view which shows the bearing apparatus which concerns on one form of this invention. The figure which shows the bearing apparatus of the state decomposed | disassembled. The figure which shows the cross section of a bearing apparatus. The figure which looked at the main body from the left side of FIG. The figure which looked at the adapter part from the right side of FIG.

Explanation of symbols

10 Bearing device 11 Grease storage chamber (lubricant storage space)
20 Body 21 Rolling bearing 24 Cover (cover member)
30 Adapter part (Adapter member)
31 Concavity 32 Through-hole 33 Discharge hole (lubricant discharge hole)
36 Oil seal (seal member)
100 conveyor (installation target)
101 Rotating shaft S1 to S3 Clearance

Claims (5)

In a bearing device that is attached to an installation target having a rotating shaft and rotatably supports the rotating shaft by a bearing that is lubricated with a lubricant at a predetermined interval.
A main body on which the bearing is disposed, and an adapter member attached to a side surface of the main body,
The adapter member is provided on the side surface of the main body so as to face a gap through which the lubricant leaks, and a lubricant storage space is formed between the side surface of the main body and the adapter member. A recess, a lubricant discharge hole that communicates the lubricant storage space with the outside, a through hole provided in the recess and through which the rotating shaft passes, and an external portion disposed in the through hole via the through hole And a seal member for preventing leakage of the lubricant to the bearing device. The adapter member is attached to one side surface of the main body and the end of the rotating shaft is exposed on the other side surface of the main body,
A cover member is further provided, which is attached to the main body so as to cover an end portion of the rotating shaft and a gap formed around the end portion and from which lubricating oil leaks, and is formed of a transparent material. Item 2. The bearing device according to Item 1. In a bearing device in which a rotating shaft is rotatably supported by a bearing to which a lubricant is supplied at a predetermined interval, and an end of the rotating shaft is exposed on a side surface.
A cover member that is attached to a side surface of the bearing device so as to cover an end portion of the rotary shaft and a gap formed around the end portion and from which the lubricating oil leaks, and is formed of a transparent material. A bearing device. In a bearing device adapter that is applied to a bearing device that rotatably supports a rotating shaft in a bearing that is lubricated with a lubricant at a predetermined interval, and that is attached to a side surface of the main body of the bearing device that supports the bearing,
A concave portion provided on the side surface of the main body so as to face a gap through which the lubricant leaks, and so as to form a lubricant storage space between the side surface of the main body and the adapter for the bearing device; Lubricant discharge hole communicating the lubricant storage space with the outside, a through hole provided in the recess and through which the rotating shaft passes, and lubrication to the outside via the through hole disposed in the through hole An adapter for a bearing device, comprising: a seal member that prevents leakage of the agent. Applied to a bearing device in which a rotating shaft is rotatably supported by a bearing to which a lubricant is supplied at a predetermined interval, and an end portion of the rotating shaft is exposed on a side surface, and at least an end portion of the rotating shaft And a bearing device cover attached to the bearing device so as to cover a gap formed around the end portion and leaking the lubricating oil,
The bearing device cover is formed of a transparent material.

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