WO2016129014A1

WO2016129014A1 - Bearing device, and method for extracting lubricant therefrom

Info

Publication number: WO2016129014A1
Application number: PCT/JP2015/000666
Authority: WO
Inventors: 隆司梅田; 木村　康樹; 宏己木谷
Original assignee: 三菱電機株式会社
Priority date: 2015-02-13
Filing date: 2015-02-13
Publication date: 2016-08-18

Abstract

To obtain a bearing device (1) in which old grease adhering to the upper part inside a bearing cover (4) can easily be discharged without removing the bearing cover (4). This bearing device is provided with: a bearing (6) secured to a bearing stand (2), the bearing (6) rotatably supporting a rotating shaft (3) of an electric motor; a bearing cover (4) for accommodating the bearing (6), a discharge port (9) for lubricant applied to the bearing (6) being formed in the bottom part of the bearing cover (4), and communicating with an internal space (4b) in which the lubricant is sealed; and a lubricant discharge member (10) having a main body (10a) that can move higher than the discharge port (9) within the bearing cover (4), and an operating part (10b) that is formed continuously with the main body (10a), the operating part (10b) protruding out of the bearing cover (4), and vibration being imparted to the main body (10a) when the operating part (10b) operates.

Description

Bearing device and method for discharging lubricant

The present invention relates to a bearing device that rotatably supports a rotating shaft that rotates by a driving force of a motor.

In the bearing device, the bearing base supports the bearing fixed to the rotary shaft by shrink fitting or the like so that the rotary shaft can rotate with respect to the bearing base. The bearing is coated with a lubricant such as grease in order to smooth the rotating operation of the rotating shaft and to protect the bearing and the rotating shaft from wear and damage caused by the rotating operation. Since the lubricant is scattered by the rotational operation of the rotary shaft and the bearing, a bearing cover is attached to the side surface of the bearing base with bolts. As a result, the lubricant is enclosed in a space surrounded by the bearing stand and the bearing cover, and there is no risk of scattering outside the bearing device.

Since the lubricant enclosed in the bearing device is denatured and hardens over time, it is necessary to periodically replace the lubricant enclosed in the bearing device. For this reason, the bearing device is provided with a grease nipple for injecting lubricant at the upper part of the bearing base and a discharge port for discharging old lubricant at the lower part of the bearing base. However, the lubricant used for the bearing has a high viscosity, and the lubricant adhering to the inner wall surface of the bearing cover and the bearing does not easily fall to the discharge port. Therefore, there is a problem that it takes time to discharge the old lubricant in the bearing device. When the size of the bearing is increased, the working efficiency is further reduced because a lubricant having a higher viscosity is used. If it is difficult to discharge the old lubricant from the lubricant outlet, there is a method of removing the bearing cover from the bearing base and performing the lubricant discharging operation. For this purpose, the bearing device is disassembled or the bearing is removed. There is a problem in that workability is also poor because it is necessary to perform either of the work of attaching and detaching the bearing cover and discharging the lubricant while maintaining the posture of the base and the rotating shaft. Further, when the bearing cover is removed from the bearing base, the lubricant is likely to be scattered outside the bearing device. Therefore, a bearing device is known in which a lubricant receiver is inserted from a discharge port and receives the lubricant in the lubricant receiver (for example, Patent Document 1). There is also known a bearing device in which a through hole is provided in the lower portion of the bearing cover, a discharge rod is inserted into the through hole, and the lubricant accumulated in the bottom of the bearing cover is scraped and discharged (for example, Patent Document 2).

Japanese Utility Model Publication No. 62-129264 (page 7, Fig. 1) JP 2010-286093 A (6th page, FIG. 2)

However, in the bearing devices described in Patent Document 1 and Patent Document 2, the lubricant receiver or the discharge rod cannot be inserted into the upper part of the bearing cover that is far from the discharge port, and the high-viscosity lubrication remaining in the upper part of the bearing cover. It was difficult to discharge the agent.

The present invention has been made to solve the above-described problems, and provides a bearing device and a lubricant discharging method that can easily discharge the high-viscosity lubricant remaining in the upper part of the bearing cover.

In the bearing device according to the first aspect of the present invention, a bearing fixed to the bearing base and rotatably supporting the rotating shaft of the motor, and a lubricant that accommodates the bearing and is applied to the bearing are provided. A bearing cover in which a discharge port of the lubricant communicating with the enclosed internal space is formed at a lower portion, a main body movable above the discharge port in the bearing cover, and the bearing formed continuously from the main body. And a lubricant discharge member that vibrates the main body when the operation unit is operated.

The lubricant discharge method according to the second aspect of the present invention is a lubricant discharge method in the bearing device according to the first aspect of the present invention, wherein the operation portion of the lubricant discharge member is operated. And applying a vibration to the main body.

According to the first and second aspects of the present invention, when the lubricant is discharged, the operation portion is operated to vibrate the main body, and the high-viscosity lubricant remaining in the bearing cover upper portion is removed from the bearing cover inner bottom portion. Therefore, the high-viscosity lubricant remaining in the upper part of the bearing cover can be dropped on the inner bottom part of the bearing cover.

It is a perspective view of the bearing apparatus which shows Embodiment 1 of this invention. FIG. 2 is a cross-sectional view of the bearing device shown in FIG. 1 along AA. It is a perspective view of the lubricant discharge member which shows Embodiment 1 of this invention. It is the perspective view which assembled the lubricant discharging member and bearing cover which show Embodiment 1 of this invention. It is the perspective view which assembled the lubricant discharging member and bearing cover which show Embodiment 2 of this invention. It is a perspective view of the bearing apparatus which shows Embodiment 3 of this invention. It is the perspective view which assembled the lubricant discharging member and bearing cover which show Embodiment 3 of this invention. It is the figure which removed the inlay part of discharge | emission and a bearing cover shown in FIG. It is the perspective view which assembled the lubricant discharging member and bearing cover which show Embodiment 4 of this invention.

Embodiment 1 FIG.
FIG. 1 is a perspective view of a bearing device 1 in this embodiment. FIG. 2 is a cross-sectional view taken along the line AA of the bearing device 1 shown in FIG. The bearing device 1 includes a bearing stand 2, a bearing cover 4, a bearing 6, a ring nut 7, a grease nipple 8, and a lubricant discharge member 10 (hereinafter referred to as a discharge member). In FIG. 1, the bearing stand 2 has an opening through which the rotary shaft 3 passes. Furthermore, the bearing covers 4 attached to both sides of the bearing stand 2 have openings 4a through which the rotary shaft 3 passes. The two bearing covers 4 have a cylindrical shape and are fixed to the bearing base 2 by bolts 5 respectively. A grease nipple 8 for injecting grease (lubricant) is provided on the upper portion of the bearing stand 2. The grease injected from the grease nipple 8 is supplied to the bearing roller 6a, the inner ring 6b, and the outer ring 6c of the bearing 6 shown in FIG. 2, smoothing the rotating operation of the rotating shaft 3, and the bearing roller 6a, the inner ring 6b, and the bearing. The bearing roller 6a, the inner ring 6b, and the outer ring 6c are protected from wear and damage generated between the roller 6a and the outer ring 6c. A discharge port 9 is provided in the lower part of the bearing cover 4. Except when grease is discharged, the discharge port 9 is closed by the lid 9a.

2, the bearing 6 is fitted in an opening provided in the bearing stand 2. The rotating shaft 3 is rotatably supported by the bearing 6. The ring nut 7 restricts the movement of the rotary shaft 3 in the axial direction. Bearing covers 4 are provided on both sides in the axial direction at the opening of the bearing stand 2. The bearing cover 4 is fixed to the bearing stand 2 so as to cover the bearing 6 in a state of surrounding the rotating shaft 3 through a minute gap. Inside the bearing cover 4, an internal space 4b for enclosing grease is provided, and a discharge member 10 is provided in the internal space 4b. The discharge member 10 surrounds the rotary shaft 3 through a gap larger than the gap between the bearing cover 4 and the rotary shaft 3. The discharge member 10 includes a main body 10a and an operation portion 10b formed on the upper portion of the main body 10a. The operation portion 10 b is provided to protrude outside the bearing cover 4. The operation unit 10b has a screw thread 10c. The thread 10c is screwed with the nut 11 outside the bearing cover 4 except when the grease is replaced. Thereby, the discharge member 10 is fixed to the bearing cover 4. The assembly surface of the bearing cover 4 and the bearing base 2, the gap between the rotary shaft 3 and the bearing cover 4, and the gap between the operation portion 10b and the bearing cover 4 are sealed with a sealing material so that grease does not leak out. ing.

FIG. 3 is a perspective view of the discharge member 10 in this embodiment. The discharge member 10 includes a main body 10a and an operation unit 10b formed integrally with the main body 10a at an upper portion of the main body 10a. The main body 10 a has a cylindrical shape, and the diameter of the bottom surface is smaller than the inner diameter of the bearing cover 4. The bottom surface of the main body 10 a has a circular opening 10 d through which the rotation shaft 3 passes, and the diameter of the opening 10 d is larger than the diameter of the rotation shaft 3. For this reason, the opening 10d does not hinder the rotation of the rotating shaft 3 when the motor is driven. Further, a notch 10e is provided at the lower part of the side surface of the main body 10a. The notch 10 e communicates with the discharge port 9. When the grease is discharged, the old grease is discharged to the outside through the notch 10e. The operation unit 10b has a cylindrical or rectangular parallelepiped shape extending upward from the upper part of the side surface of the main body 10a. The discharge member 10 is made of, for example, metal or resin. Or you may form with another material.

FIG. 4 is a perspective view of the discharge member 10 in this embodiment assembled to the bearing cover 4 and viewed from the discharge member 10 side. A gap is provided between the inner peripheral surface of the bearing cover 4 and the outer peripheral surface of the main body 10a. When the operator discharges the grease, when the operator operates the operation portion 10b protruding outward from the upper portion of the bearing cover 4 in the vertical direction, the discharge member 10 can move by the amount of the gap. A discharge port 9 is provided in the lower portion of the bearing cover 4, and when grease is replaced, old grease is discharged to the outside of the bearing cover 4 through the notch 10 e and the discharge port 9.

Next, a grease discharging method of the bearing device 1 in this embodiment will be described. At the time of grease replacement, the worker loosens the nut 11 and releases the fixing of the operation portion 10b to the bearing cover 4. The operator operates the operation portion 10 b that protrudes to the outside of the bearing cover 4 and applies vibration to the main body 10 a that is inside the bearing cover 4. The old grease adhering to the main body 10a falls to the lower part in the bearing cover 4 due to the vibration of the main body 10a. An operator inserts a discharge rod (not shown) into the discharge port 9 of the bearing cover 4 and the notch 10 e of the discharge member 10, and discharges the old grease that has fallen to the bottom of the bearing cover 4 to the outside of the bearing cover 4. .

Further, when grease adheres to the inner wall of the bearing cover 4, the worker operates the discharge member 10 to give vibration to the bearing cover 4. The grease adhering to the inner wall of the bearing cover 4 falls to the lower part in the bearing cover 4 due to the vibration of the bearing cover 4.

As described above, in the bearing device 1 according to the present embodiment, the main body 10a that is movably provided in the bearing cover 4 and the operation unit that is formed integrally with the main body 10a and projects to the outside of the bearing cover 4. A discharge member 10 having 10b is provided. Thus, even if the bearing cover 4 is not removed, the main body 10a can be vibrated by operating the operating portion 10b in the vertical direction, and the old grease adhered to the main body 10a of the discharge member 10 due to the vibration of the main body 10a. Can be dropped to the lower part of the bearing cover 4, so that the grease replacement work is facilitated. Further, by applying vibration to the bearing cover 4 via the main body 10a, old grease adhered to the upper part of the inner wall of the bearing cover 4 can be dropped to the lower part of the bearing cover 4, and the grease discharging operation is facilitated.

In the bearing device 1 according to this embodiment, the bearing 6 is fixed to the bearing stand 2 and rotatably supports the rotating shaft 3 of the motor, and the bearing 6 is accommodated and lubricated to be applied to the bearing 6. A bearing cover 4 in which a lubricant discharge port 9 communicating with the internal space 4b for encapsulating the agent is formed in the lower part, and a main body 10a that is movable above the discharge port 9 in the bearing cover 4 and the main body 10a are continuous. And a lubricant discharge member 10 that vibrates the main body 10a when the operation portion 10b is operated. As a result, vibration can be applied to the main body 10a of the discharge member 10 provided inside the bearing cover 4 by operating the operation portion 10b provided outside the bearing cover 4, thereby allowing the main body 10a to be vibrated. The adhered grease can be dropped to the lower part of the bearing cover 4. Further, the bearing cover 4 is vibrated through the main body 10a, and the high-viscosity old grease adhering in the bearing cover 4 can be dropped to the lower portion of the bearing cover 4, so that the grease discharging operation is facilitated.

Further, in the bearing device 1 according to this embodiment, the main body 10a of the discharge member 10 has an opening 10d through which the rotary shaft 3 passes and whose diameter is larger than the diameter of the rotary shaft 3, and a discharge port 9 at the bottom. A notch portion 10e that communicates is provided. Thereby, since the diameter of the opening 10d of the main body 10a is larger than the diameter of the rotary shaft 3, there is no fear of preventing the rotation of the rotary shaft 3, and the main body 10a is moved within the bearing cover 4 when replacing the grease. Can be made. Furthermore, since the main body 10a is provided with a notch 10e at the lower part, old grease that has dropped to the lower part of the bearing cover 4 can be discharged from the outlet 9 of the bearing cover 4 through the notch 10e.

In the bearing device 1 according to this embodiment, the operation portion 10 b of the lubricant discharging member 10 has a screw thread 10 c, and the screw thread 10 c is screwed with the nut 11 outside the bearing cover 4. . Thereby, since the discharge member 10 can be fixed except at the time of grease replacement | exchange, there is no possibility that the main body 10a may interfere with rotation of the rotating shaft 3. FIG.

Further, the grease discharging method in the bearing device 1 of this embodiment includes a step of operating the operating portion 10b of the discharging member 10 to apply vibration to the main body 10a. As a result, the operating portion 10b protruding to the outside of the bearing cover 4 is operated to vibrate the main body 10a provided inside the bearing cover 4 so that the old grease adhering to the main body 10a can be dropped, and the grease is discharged. Work becomes easy.

Further, the grease discharging method in the bearing device 1 of this embodiment includes a step of operating the operating portion 10b of the discharging member 10 and applying vibration to the bearing cover 4 via the main body 10a. Thus, vibration can be applied to the bearing cover 4 from the inside without removing the bearing cover 4, and the old grease adhering to the inner wall of the bearing cover 4, particularly the upper part, can be dropped to the lower part of the bearing cover 4. , Grease discharge work becomes easy.

In addition, although the operation part 10b protruded from the upper part of the bearing cover 4, it is not restricted to this, What is necessary is just to protrude outside the bearing cover 4. However, it is desirable that the operation portion 10 b protrudes from the upper side from the center of the horizontal position of the bearing cover 4. Moreover, although the operation part 10b of the discharge member 10 is formed integrally with the main body 10a, the present invention is not limited thereto, and the main body 10a and the operation part 10b may be formed of different members and connected.

Embodiment 2. FIG.
The larger the bearing device 1 is, the higher the viscosity of the grease used for the lubricant of the bearing device 1. When the viscosity of the grease is increased, it becomes difficult to drop the grease adhering in the bearing cover 4 to the lower part of the bearing cover 4 even if vibration is given to the discharging member 10 in the bearing cover 4 at the time of discharging the grease. Therefore, in this embodiment, a discharge member 10 that not only gives vibration to the main body 10a provided in the bearing cover 4 but also can scrape off old grease adhering to the upper part in the bearing cover 4 will be described. In this embodiment, the configuration excluding the discharge member 10 is the same as that of the first embodiment.

FIG. 5 is a perspective view of the discharge member 10 in this embodiment assembled to the bearing cover 4 and viewed from the discharge member 10 side. In this embodiment, the discharge member 10 includes a main body 10 a provided in the bearing cover 4 and an operation portion 10 b that is formed integrally with the main body 10 a and that protrudes from the upper portion of the bearing cover 4. The main body 10 a is an arc-shaped plate and is provided so as to face the lower side in the bearing cover 4. The operation unit 10 b has a cylindrical or rectangular parallelepiped shape extending upward from the center of the main body 10 a and is provided so as to protrude from the upper part of the bearing cover 4. The operating portion 10b has a thread 10c and is fixed to the bearing cover 4 with a nut 11 except during the grease discharging operation. The discharge member 10 is made of, for example, metal or resin. Or you may form with another material.

Next, a grease discharging method of the bearing device 1 in this embodiment will be described. At the time of grease replacement, the worker loosens the nut 11 and releases the fixing of the operation portion 10b to the bearing cover 4. The operator operates the operation portion 10 b that protrudes to the outside of the bearing cover 4 to give vibration to the main body 10 a that is inside the bearing cover 4. The grease adhering to the main body 10a falls to the lower part of the bearing cover 4 due to the vibration of the main body 10a. Further, the worker operates the operation unit 10b to apply vibration to the bearing cover 4 through the main body 10a. The old grease adhering to the inner wall of the bearing cover 4 falls to the lower part in the bearing cover 4 due to the vibration of the bearing cover 4. Furthermore, in the discharge member 10 in this embodiment, the inner wall of the bearing cover 4 can be slid in the vertical direction by the main body 10a. The main body 10 a can slide in the vertical direction on the inner wall of the bearing cover 4 from the upper end of the bearing cover 4 to the rotating shaft 3. Thereby, the old grease adhering to the upper part in the bearing cover 4 can be scraped off by the main body 10a. When the grease adhering in the bearing cover 4 is dropped to the lower part of the bearing cover 4, the worker inserts the discharge rod from the discharge port 9 of the bearing cover 4, and the old grease dropped to the lower part of the bearing cover 4 is Discharge to the outside of the cover 4.

As described above, in the bearing device 1 according to the present embodiment, as in the first embodiment, the main body 10a movably provided in the bearing cover 4 and the bearing cover formed integrally with the main body 10a. 4 is provided with a discharge member 10 having an operation portion 10b protruding outside. Thus, even if the bearing cover 4 is not removed, the main body 10a can be vibrated by operating the operating portion 10b in the vertical direction, and the grease adhering to the main body 10a is removed by the vibration of the main body 10a. 4 is dropped to the bottom. Further, vibration can be applied to the bearing cover 4 via the main body 10 a, and old grease attached to the inner wall of the bearing cover 4, particularly old grease attached to the upper portion of the inner wall of the bearing cover 4 can be dropped to the lower portion of the bearing cover 4. Furthermore, since the main body 10a can be slid on the inner wall of the bearing cover 4 and the grease adhering to the upper part of the inner wall of the bearing cover 4 can be scraped off, the bearing device 1 having a large size and having high viscosity can be used. Even when the discharge rod inserted through the discharge port 9 does not reach the upper part of the bearing cover 4, the grease discharge operation is facilitated.

Further, in the bearing device 1 in this embodiment, the main body 10a of the discharge member 10 slides above the discharge port 9 on the inner wall of the bearing cover 4 when the operation portion 10b is operated. Thereby, it becomes possible to scrape off the old high-viscosity grease adhering to the upper part of the inner wall of the bearing cover 4 with the main body 10a, and the grease discharging operation is facilitated.

Further, in the bearing device 1 in this embodiment, the main body 10a of the discharge member 10 has an arc shape. Thereby, the main body 10 a of the discharge member 10 can slide in the vertical direction in the bearing cover 4, and the old grease adhering to the upper part in the bearing cover 4 can be scraped off.

Further, the grease discharging method in the bearing device 1 of this embodiment includes a step of sliding the main body 10a up and down with respect to the inner wall of the bearing cover 4 by operating the operation portion 10b. Thereby, the old grease adhering to the upper part of the inner wall of the bearing cover 4 can be scraped off without removing the bearing cover 4, and the grease can be easily discharged.

Embodiment 3 FIG.
In the first embodiment and the second embodiment, the front shape of the bearing cover 4 is circular. However, in this embodiment, the case where the front shape of the bearing cover 4 is a quadrangle is shown. FIG. 6 is a perspective view of the bearing device 1 in this embodiment. In this embodiment, the configuration excluding the bearing cover 4 and the discharge member 10 is the same as that of the first and second embodiments.

FIG. 7 is a perspective view of the discharge member 10 in this embodiment assembled to the bearing cover 4 and viewed from the discharge member 10 side. FIG. 8 is a view in which the spigot portion 4 c of the bearing cover 4 is removed from the discharge member 10 and the bearing cover 4 shown in FIG. 7. The bearing cover 4 includes an inlay portion 4 c having a circular opening, and is fixed with a bolt 5 in a state where the inlay portion 4 c is fitted to the bearing stand 2. A discharge port 9 is provided in the lower part of the bearing cover 4.

The discharge member 10 includes a rectangular main body 10 a and an operation portion 10 b that are formed integrally with the main body 10 a and project from the upper portion of the bearing cover 4 in the same manner as the bearing cover 4. The main body 10a has a U-shaped notch 10e that is open at the bottom. The width of the notch 10 e is equal to or larger than the diameter of the opening 4 a of the bearing cover 4. The operation portion 10 b has a cylindrical or rectangular parallelepiped shape extending from the upper center of the main body 10 a and is provided so as to protrude from the upper portion of the bearing cover 4. The operation portion 10b has a thread 10c, and the operation portion 10b is fixed to the bearing cover 4 with a nut 11 except when the grease is replaced. The discharge member 10 is made of, for example, metal or resin. Or you may form with another material.

Next, a grease discharging method of the bearing device 1 in this embodiment will be described. At the time of grease replacement, the worker loosens the nut 11 and releases the fixing of the operation portion 10b to the bearing cover 4. The operator operates the operation portion 10 b that protrudes to the outside of the bearing cover 4 to give vibration to the main body 10 a that is inside the bearing cover 4. The grease adhering to the main body 10a falls to the lower part of the bearing cover 4 due to the vibration of the main body 10a. In addition, the worker operates the operation unit 10 b to apply vibration to the bearing cover 4 through the main body 10 a inside the bearing cover 4. The old grease adhering to the inner wall of the bearing cover 4 falls to the lower part in the bearing cover 4 due to the vibration of the bearing cover 4. Furthermore, in the discharge member 10 in this embodiment, the main body 10a can slide on the inner wall of the bearing cover 4 in the vertical direction. The main body 10a is slidable in the vertical direction from a position where the inner wall of the bearing cover 4 is in contact with the upper end of the bearing cover 4 to a position where the bottom of the U-shaped notch 10e is in contact with the upper portion of the rotary shaft 3. Thereby, the old grease adhering to the upper part in the bearing cover 4 can be scraped off by the main body 10a. When the grease adhering in the bearing cover 4 is dropped to the lower part of the bearing cover 4, the worker inserts the discharge rod from the discharge port 9 of the bearing cover 4, and the old grease dropped to the lower part of the bearing cover 4 is Discharge to the outside of the cover 4.

As described above, in the bearing device 1 according to the present embodiment, as in the first embodiment, the main body 10a movably provided in the bearing cover 4 and the bearing cover integrally formed with the main body 10a. 4 is provided with a discharge member 10 having an operation portion 10b protruding outside. The bearing cover 4 and the main body 10a of the discharge member 10 are each rectangular. Thereby, even if the bearing cover 4 is a quadrangle, the main body 10a can be vibrated by operating the operating portion 10b in the vertical direction without removing the bearing cover 4, and the main body 10a is vibrated by the vibration of the main body 10a. It is possible to drop the grease adhering to the bottom of the bearing cover 4. Further, by applying vibration to the bearing cover 4 through the main body 10a, the grease adhering to the inner wall of the bearing cover 4, particularly the old grease adhering to the upper part of the inner wall of the bearing cover 4 is dropped to the lower part of the bearing cover 4. be able to. Furthermore, since the main body 10a can slide in the vertical direction on the inner wall of the bearing cover 4, the grease adhering to the upper part in the bearing cover 4 can be scraped off. Therefore, even when the bearing device 1 has a large size and uses high-viscosity grease, and the discharge rod inserted from the discharge port 9 does not reach the upper part in the bearing cover 4, the grease discharge operation can be performed. It becomes easy.

Further, in the bearing device 1 according to this embodiment, the main body 10a of the discharge member 10 has a polygonal shape and includes a notch 10e through which the rotary shaft 3 is inserted and communicated with the discharge port 9 at the center of the horizontal position. As a result, even when the bearing cover 4 has a quadrangular shape, it is attached to the main body 10a by operating the operating portion 10b protruding to the outside of the bearing cover 4 and applying vibration to the main body 10a of the discharge member 10 when replacing the grease. The grease that is present can be dropped to the lower part of the bearing cover 4. Further, by applying vibration to the bearing cover 4 through the main body 10 a, old grease attached to the inner wall of the bearing cover 4, particularly the upper part, can be dropped to the lower part in the bearing cover 4. Furthermore, by moving the main body 10a up and down, the old grease adhering to the upper part in the bearing cover 4 can be scraped off, and the grease discharging operation is facilitated.

In addition, although the operation part 10b protruded from the upper part of the bearing cover 4, it is not restricted to this, What is necessary is just to protrude outside the bearing cover 4. However, it is desirable that the operation portion 10 b protrudes from the upper side from the center of the horizontal position of the bearing cover 4.

The bearing cover 4 and the main body 10a of the discharge member 10 are rectangular, but are not limited to this, and may be other polygonal shapes. Moreover, although the operation part 10b of the discharge member 10 is formed integrally with the main body 10a, the main body 10a and the operation part 10b may be formed of different members and connected.

Embodiment 4 FIG.
In the first to third embodiments, one discharge member 10 is provided for one bearing cover 4. In this embodiment, a configuration in which a plurality of discharge members 10 are provided for one bearing cover 4 will be described. The configuration excluding the discharge member 10 may be the configuration described in any one of the first to third embodiments.

FIG. 9 is a perspective view of the discharge member 10 in this embodiment assembled to the bearing cover 4 and viewed from the discharge member 10 side. In FIG. 9, the bearing cover 4 has a quadrangular shape as in the third embodiment. In FIG. 9, three discharge members 10 are provided in the horizontal direction. Each of the discharge members 10 includes a plate-like main body 10 a provided horizontally and an operation portion 10 b formed integrally with the main body 10 a and protruding from the upper portion of the bearing cover 4. The size of the main body 10a may be the same for all the discharge members 10, or may be different from each other. The operation unit 10 b has a cylindrical or rectangular parallelepiped shape extending from the center of the main body 10 a and is provided so as to protrude from the upper part of the bearing cover 4. Each of the operation portions 10b has a screw thread 10c, and the operation portion 10b is fixed to the bearing cover 4 with a nut 11 except when grease is exchanged. The discharge member 10 is made of, for example, metal or resin. Or you may form with another material.

Next, a grease discharging method of the bearing device 1 in this embodiment will be described. At the time of grease replacement, the worker loosens the nut 11 and releases the fixing of the operation portion 10b to the bearing cover 4. The operator operates the operation portion 10 b provided to protrude outside the bearing cover 4, and gives vibration to the main body 10 a inside the bearing cover 4. The grease adhering to the main body 10a falls to the lower part of the bearing cover 4 due to the vibration of the main body 10a. In addition, the worker operates the operation unit 10 b to apply vibration to the bearing cover 4 through the main body 10 a inside the bearing cover 4. The old grease adhering to the inner wall of the bearing cover 4 falls to the lower part in the bearing cover 4 due to the vibration of the bearing cover 4. Furthermore, in the discharge member 10 in this embodiment, the main body 10a can slide in the vertical direction on the inner wall of the bearing cover 4 respectively. Main bodies 10 a provided at both ends of the plurality of discharge members 10 are slidable in the vertical direction on the inner wall of the bearing cover 4 from the upper end of the bearing cover 4 to the vertical center position of the rotary shaft 3. The other main body 10 a can slide in the vertical direction on the inner wall of the bearing cover 4 from the upper end of the bearing cover 4 to the rotating shaft 3. Thereby, the old grease adhering to the upper part in the bearing cover 4 can be scraped off by the main body 10a. The operator inserts a discharge rod into the discharge port 9 of the bearing cover 4 and discharges the old grease that has fallen to the bottom of the bearing cover 4 to the outside of the bearing cover 4.

As described above, in the bearing device 1 according to the present embodiment, as in the first embodiment, the main body 10a movably provided in the bearing cover 4 and the bearing cover integrally formed with the main body 10a. 4 is provided with a discharge member 10 having an operation portion 10b protruding outside. Thus, even if the bearing cover 4 is not removed, the main body 10a can be vibrated by operating the operating portion 10b in the vertical direction, and the grease adhering to the main body 10a is removed by the vibration of the main body 10a. 4 can be dropped to the lower part. Further, by applying vibration to the bearing cover 4 through the main body 10a, the old grease adhering in the bearing cover 4, particularly the old grease adhering to the upper part of the inner wall of the bearing cover 4 is dropped to the lower part of the bearing cover 4. Therefore, the grease discharging operation becomes easy. Further, a plurality of discharge members 10 are provided, and the inner wall of the bearing cover 4 can be slid up and down without interfering with the rotating shaft 3 on both the left and right sides of the horizontal position in the bearing cover 4. Thereby, it becomes easy to drop the old grease adhering to both the left and right sides of the horizontal position in the bearing cover 4 to the lower part of the bearing cover 4.

In the bearing device 1 in this embodiment, the main body 10a of the lubricant discharge member 10 is a horizontally provided plate, and a plurality of lubricant discharge members 10 are provided. As a result, the discharge member 10 can slide on the inner wall of the bearing cover 4 on both the left and right sides of the horizontal position in the bearing cover 4 without interfering with the rotating shaft 3, and adhere to both the left and right sides of the vertical position in the bearing cover 4. The old grease can be efficiently dropped to the lower part of the bearing cover 4.

Although three discharge members 10 are provided for one bearing cover 4, the present invention is not limited to this. The number of the discharge members 10 may be an arbitrary number.

Although the main body 10a provided at both ends of the plurality of discharge members 10 is slidable in the vertical direction on the inner wall of the bearing cover 4 from the upper end of the bearing cover 4 to the vertical center position of the rotary shaft 3, Not limited to this. The main body 10 a provided at both ends may be configured such that the inner wall of the bearing cover 4 can slide from the upper end of the bearing cover 4 to below the center position in the vertical direction of the rotary shaft 3.

1 Bearing device, 2 bearing stand, 3 rotary shaft, 4 bearing cover, 4b inner space, 5 bolt, 6 bearing, 6a bearing roller, 6b inner ring, 6c outer ring, 7 ring nut, 8 grease nipple, 9 discharge port, 10 discharge Member, 10a body, 10b operation part, 10c thread, 10d opening, 10e notch, 11 nut

Claims

A bearing fixed to the bearing stand and rotatably supporting the rotating shaft of the motor;
A bearing cover that houses the bearing and has a lubricant outlet formed in a lower portion thereof that communicates with an internal space that encloses a lubricant applied to the bearing;
A main body that is movable above the discharge port in the bearing cover, and an operation portion that is formed continuously from the main body and protrudes to the outside of the bearing cover, and when the operation portion is operated, the main body A bearing device comprising a lubricant discharge member for imparting vibration to the shaft.
The bearing device according to claim 1, wherein the main body of the lubricant discharging member slides above the discharge port of the inner wall of the bearing cover when the operation portion is operated.
2. The bearing device according to claim 1, wherein the main body of the lubricant discharging member includes an opening through which the rotation shaft passes and a diameter larger than the diameter of the rotation shaft, and a notch communicating with the discharge port at a lower portion.
3. The bearing device according to claim 1, wherein a main body of the lubricant discharging member has an arc shape.
The bearing device according to claim 1 or 2, wherein a main body of the lubricant discharging member is polygonal and includes a notch portion through which the rotary shaft is inserted and communicated with the discharge port at the center of a horizontal position.
The bearing device according to claim 1 or 2, wherein a main body of the lubricant discharging member is a plate provided horizontally, and a plurality of the lubricant discharging members are provided.
The bearing device according to any one of claims 1 to 6, wherein the operation portion of the lubricant discharging member has a screw thread, and the screw thread is screwed into a nut outside the bearing cover.
A method for discharging a lubricant in a bearing device according to any one of claims 1 to 7,
A lubricant discharging method comprising a step of operating the operating portion of the lubricant discharging member to apply vibration to the main body.
A method for discharging a lubricant in a bearing device according to any one of claims 1 to 7,
A method for discharging a lubricant, comprising a step of operating an operating portion of the lubricant discharging member to apply vibration to the bearing cover through the main body.
A method for discharging a lubricant in a bearing device according to any one of claims 2 or 4 to 7,
A lubricant discharging method comprising a step of operating the operating portion to slide the main body up and down with respect to the inner wall of the bearing cover.