JP7382166B2 - Lubricating oil storage mechanism - Google Patents

Description

The present invention relates to a lubricating oil storage mechanism.

A differential device mounted on a vehicle is a device that distributes the driving force of an engine to one drive wheel and the other drive wheel (for example, Patent Document 1). Lubricating oil is stored in the lower part of the housing surrounding the differential device. The stored lubricating oil is scooped up by the rotation of the ring gear that constitutes the differential device, and is supplied to the rolling bearings and each gear of the differential device.

Japanese Patent Application Publication No. 2008-82530

In the differential device described above, when the vehicle stops, the ring gear stops rotating, so the supply of lubricating oil to the rolling bearings is stopped. Additionally, the lubricating oil flows down from the lubricated surface of the rolling bearing over time. Therefore, when starting a vehicle that has been stopped for a long time, there may be no lubricating oil on the lubricating surface of the rolling bearing.

Therefore, there is a need for the development of a technology that can supply lubricating oil to the lubricated surface when the rolling bearing starts rotating.

An object of the present invention is to provide a lubricating oil storage mechanism that can supply lubricating oil to a lubricated surface when a rolling bearing starts rotating.

In order to solve the above-mentioned problems, the lubricating oil storage mechanism of the present invention provides an end surface in the rotational axis direction of a rotating body main body that is fixed to the inner ring part of a rolling bearing and rotates together with the inner ring part, or an end face in the rotational axis direction of the inner ring part. The storage part main body is connected to the inner ring part or the rotating body main body and extends outward of the rolling bearing in the rotational axis direction, and the inner ring part from the bottom part. It has a side part that stands upright in the radial direction outward of the bearing, and a guide part that extends outward from the tip of the side part in the direction of the rotational axis. Lubricating oil is stored in the space surrounded by the parts.
In order to solve the above problems, another lubricating oil storage mechanism of the present invention is provided on an end face in the direction of the rotation axis of a rotary body that is fixed to the inner ring part of a rolling bearing and rotates together with the inner ring part, or in the direction of the rotation axis in the inner ring part. A plurality of reservoir bodies are provided in the circumferential direction of the end face of the reservoir body, and the reservoir body is connected to the inner ring part or the rotating body body, and the rotating body body side is connected to the rotating body body side from the outer diameter side end face of the inner ring part. A bottom part extending outward of the rolling bearing in the direction of the rotation axis, a side part standing radially outward of the inner ring part from the bottom part, and a guide extending outward of the rolling bearing in the rotational axis direction from the tip of the side part. The lubricating oil is stored in a space surrounded by a bottom part and a side part.

In order to solve the above problems, another lubricating oil storage mechanism of the present invention is provided on the end face in the direction of the rotational axis of the rotary body that is fixed to the inner ring part of the rolling bearing and rotates together with the inner ring part, or on the rotational axis in the inner ring part. A plurality of reservoir bodies are provided in the circumferential direction of the end face of the direction, and the reservoir body is connected to the inner ring part or the rotating body body, and has a bottom part extending outward of the rolling bearing in the rotation axis direction, and a bottom part. It has a side part that stands upright radially outward of the inner ring part, and a guide part that extends outward from the tip of the side part in the direction of the rotational axis, and is surrounded by the bottom part and the side part. Lubricating oil is stored in the space.

Further, the outer ring of the rolling bearing has a protruding part that protrudes outward of the rolling bearing in the direction of the rotation axis, and the tip of the side part of the storage body or the tip of the guide part is further away from the protrusion in the direction of the rotation axis. It may be located outside the rolling bearing.

Further, the rolling bearing may be a tapered roller bearing, and the reservoir main body may be provided on the small diameter side of the inner ring portion or on the rotating body main body fixed to the small diameter side of the inner ring portion.

According to the present invention, when the rolling bearing starts rotating, it is possible to supply lubricating oil to the lubricated surface.

FIG. 1 is a diagram illustrating a differential device according to an embodiment. FIG. 3 is a vertical cross-sectional view of the lubricating oil storage mechanism. FIG. 3 is an exploded perspective view of the storage unit. It is a front view of a storage unit. FIG. 3 is a vertical cross-sectional view of the storage unit. It is a figure explaining the lubricating oil storage mechanism concerning a modification.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in these embodiments are merely illustrative to facilitate understanding of the invention, and do not limit the invention unless otherwise specified. In this specification and the drawings, elements with substantially the same functions and configurations are given the same reference numerals to omit redundant explanation, and elements not directly related to the present invention are omitted from illustration. do.

[Differential device 100]
FIG. 1 is a diagram illustrating a differential device 100 according to this embodiment. In FIG. 1, for ease of understanding, a vertical sectional view of the housing 10, rolling bearings 130, 140, and lubricating oil storage mechanism 200 is shown, and an external view of the ring gear 110 and differential case 120 is shown. In addition, in the following figures including FIG. 1 of this embodiment, the perpendicularly intersecting ±X axis (horizontal direction), ±Y axis (horizontal direction), and ±Z axis (vertical direction) are defined as shown. There is.

The differential device 100 is provided in a vehicle and distributes the driving force (torque) of the engine to one drive wheel and the other drive wheel. As shown in FIG. 1, differential device 100 is housed within housing 10. As shown in FIG. Lubricating oil is stored in the lower part 12 of the housing 10. Differential device 100 includes a ring gear 110, a differential case 120, and rolling bearings 130 and 140.

Ring gear 110 is rotatably fixed to housing 10 via a rolling bearing 130. The ring gear 110 is meshed with a drive pinion gear (not shown), receives the driving force of the engine via the drive pinion gear, and rotates with the ±X axis direction in FIG. 1 as a rotation axis.

The differential case 120 (rotating body main body) is rotatably fixed to the housing 10 via a rolling bearing 140. The differential case 120 is connected to the ring gear 110 and rotates integrally with the ring gear 110 with the ±X axis direction in FIG. 1 as a rotation axis. A pinion gear and a side gear (not shown) are provided inside the differential case 120. The rotation of the differential case 120 is transmitted to the drive shaft and drive wheels via a pinion gear and side gears.

The rolling bearings 130, 140 are tapered roller bearings. The rolling bearing 130 includes an inner ring portion 132, an outer ring portion 134, and rolling elements 136. Inner ring portion 132 is connected to ring gear 110. Outer ring portion 134 is connected to housing 10 . The rolling element 136 has a conical shape and is provided between the inner ring part 132 and the outer ring part 134 so as to be able to roll. In this embodiment, the rolling bearing 130 is connected to the ring gear 110 at the large diameter side of the inner ring portion 132 (rolling elements 136).

The rolling bearing 140 includes an inner ring portion 142, an outer ring portion 144, and rolling elements 146. Inner ring portion 142 is press-fitted into differential case 120. Outer ring portion 144 is connected to housing 10 . The rolling element 146 has a conical shape and is rotatably provided between the inner ring part 142 and the outer ring part 144. In this embodiment, the rolling bearing 140 is connected to the differential case 120 at the large diameter side of the inner ring portion 142 (rolling elements 146).

In the differential device 100, the ring gear 110 rotates as the engine (transmission) rotates, thereby scraping up the lubricating oil stored in the lower part 12 of the housing 10. The scraped up lubricating oil collides with the wall surface of the upper part 14 of the housing 10 and falls. During the falling process, lubricating oil is supplied to the pinion gear and side gear provided in the differential case 120 through the opening 122 formed in the differential case 120. Furthermore, the lubricating oil is applied to the lubricating surface of the rolling bearing 130 (between the inner ring portion 132 and outer ring portion 134 and the rolling elements 136) and the lubricating surface of the rolling bearing 140 (between the inner ring portion 142 and outer ring portion 144 and the rolling elements 146). supply during).

However, when the vehicle stops, the rotation of ring gear 110 stops. Therefore, the supply of lubricating oil to the rolling bearings 130, 140 is stopped, and the lubricating oil flows down from the lubricating surface to the lower part 12 of the housing 10. Therefore, when starting a vehicle that has been stopped for a long period of time, the lubricating surfaces of the rolling bearings 130 and 140 may not have lubricating oil (an oil film may not be formed). If this happens, the lubricated surface may seize and the rolling bearings 130, 140 may be damaged.

Therefore, conventionally, the hydrostatic surface of the lubricating oil (indicated by the broken line in FIG. 1) is set at the height H at which the rolling bearings 130 and 140 are located, so that the rolling bearings 130 and 140 are always immersed in the lubricating oil. It was composed. That is, when the vehicle is stopped (at a stop), the lower portion 12 of the housing 10 stores lubricating oil up to the position where the rolling bearings 130, 140 are immersed. However, this conventional technique has a problem in that the agitation load imposed by the ring gear 110 increases, resulting in poor fuel efficiency.

Therefore, in this embodiment, the lubricating oil storage mechanism 200 is provided at or near the rolling bearings 130 and 140. The lubricating oil storage mechanism 200 provided in the rolling bearing 140 will be described below. Note that since the lubricating oil storage mechanism 200 provided in the rolling bearing 130 is substantially the same as the lubricating oil storage mechanism 200 provided in the rolling bearing 140, a description thereof will be omitted here.

[Lubricating oil storage mechanism 200]
FIG. 2 is a vertical sectional view of the lubricating oil storage mechanism 200. FIG. 3 is an exploded perspective view of the storage unit 210. Note that the guide portion 270 is omitted in FIG. 3 for ease of understanding.

As shown in FIG. 2, lubricating oil storage mechanism 200 includes a storage unit 210 and a protrusion 220. Storage unit 210 is connected (fixed) to differential case 120 and rotates together with differential case 120 . The storage unit 210 includes a plurality of storage main bodies 300, which will be described later. The protruding portion 220 is provided on the outer ring portion 144 of the rolling bearing 140, and protrudes outward from the rolling bearing 140 in the direction of the rotational axis (+X-axis direction in FIG. 2, hereinafter simply referred to as “outside in the rotational axis direction”).

As shown in FIGS. 2 and 3, the storage unit 210 includes a fixing part 230 (side part), a plurality of bottom parts 240, a plurality of wall parts 250 (side part), and a plurality of partition parts 260 (side part). and a plurality of guide parts 270.

The fixing part 230 has a disk shape, and has a circular opening 232 formed in the center. The inner diameter (opening 232) of the fixing portion 230 is greater than or equal to the inner diameter 126 of the differential case 120. The outer diameter of the fixing portion 230 is larger than the inner diameter of the inner ring portion 142 and substantially equal to the outer diameter of the smaller diameter side of the inner ring portion 142. The fixing portion 230 is either an end surface 124 of the differential case 120 in the rotation axis direction opposite to the end surface to which the ring gear 110 is connected, or an end surface 142a on the small diameter side of the inner ring portion 142 of the rolling bearing 140. Or fixed to both. In this embodiment, the fixing part 230 is fixed to the end surface 124 of the differential case 120 with screws 234.

The bottom portion 240 is a flat plate member that is connected (for example, welded) to the fixing portion 230 and extends outward in the rotation axis direction (+X-axis direction in FIGS. 2 and 3). As shown in FIG. 3, in this embodiment, six bottom portions 240 are provided in succession, and the six bottom portions 240 form a hexagonal cylinder 242. The hexagonal cylinder 242 is connected to the fixed part 230 such that the central axis substantially coincides with the rotation axis.

The wall portion 250 is a flat plate member that stands radially outward from the bottom portion 240 of the inner ring portion 142 (±Z-axis direction in FIGS. 2 and 3). As shown in FIG. 3, in this embodiment, six wall portions 250 are consecutively provided, and each of the six wall portions 250 is a hexagonal flat plate member with a hexagonal opening 252a formed in the center. A plate 252 is formed.

The partition part 260 partitions (divides) the space surrounded by the fixed part 230, the hexagonal tube 242, and the hexagonal plate 252 into a plurality of spaces (six in this embodiment). In this embodiment, six partitions 260 are provided. The partition portion 260 is a plate member that stands vertically from the apex of the hexagonal cylinder 242 . The width of the partition portion 260 (the length in the ±X axis directions in FIGS. 2 and 3) is substantially equal to the width of the bottom portion 240 (the length of the hexagonal tube 242). The partition portion 260 is, for example, integrally molded with the bottom portion 240.

That is, the storage unit 210 includes six storage main bodies 300 each including one bottom 240 , one wall 250 , and two partitions 260 . In other words, a plurality (six) of the storage section main bodies 300 are provided in the circumferential direction of the end surface 142a of the inner ring section 142 in the rotation axis direction.

As shown in FIG. 2, the guide section 270 is a member extending outward in the direction of the rotation axis from the tip of the wall section 250. The tip of the guide portion 270 is located further outward than the protruding portion 220 in the direction of the rotation axis.

Next, a manner in which lubricating oil is stored by the lubricating oil storage mechanism 200 will be described. FIG. 4 is a front view of the storage unit 210. FIG. 5 is a vertical sectional view of the storage unit 210. Furthermore, lubricating oil is shown by cross hatching in FIGS. 4(a) and 4(b). In addition, in FIGS. 4A and 4B, in order to facilitate understanding, the bottom portion 240 is shown filled with black, and the wall portion 250 is shown with a broken line. Furthermore, the guide portion 270 is omitted in FIGS. 4(a) and 4(b). Furthermore, in FIG. 5, lubricating oil is shown filled in black.

As described above, storage unit 210 rotates integrally with differential case 120. When the rotation of the differential case 120 is stopped as the vehicle stops, the rotation of the storage unit 210 is also stopped accordingly. As shown in FIGS. 4(a) and 4(b), at least one bottom 240 among the plurality of bottoms 240 constituting the storage unit 210 is fixed in the vertical direction (see FIG. (a) and the ±Z-axis direction in FIG. 4(b)).

Therefore, when the vehicle stops, the lubricating oil that falls from the upper part 14 of the housing 10 and the lubricating oil that flows down from the lubricating surface of the rolling bearing 140 is absorbed into the space defined by the bottom part 240, the wall part 250, and the partition part 260. (the space surrounded by the broken line in FIGS. 4(a) and 4(b)). That is, since the storage unit 210 does not rotate while the vehicle is stopped, at least one of the plurality of storage main bodies 300 can continue to store lubricating oil.

Then, when the vehicle is started and the driving force of the engine is transmitted to the ring gear 110 and the ring gear 110 rotates, the differential case 120 rotates, and the storage unit 210 rotates accordingly.

Then, as shown in FIG. 5(a), the lubricating oil stored in the reservoir main body 300 is moved outward in the radial direction of the inner ring portion 142 (±Z-axis direction and ±Y-axis in FIG. 5(a)) by centrifugal force. direction). Then, as shown by the arrow in FIG. 5A, after the lubricating oil collides with the protrusion 220, it is guided to the lubricating surface of the rolling bearing 140. In addition, the lubricating oil that was not moved by the centrifugal force falls onto the protrusion 220 due to its own weight (gravity) and is guided to the lubricated surface of the rolling bearing 140, as shown by the arrow in FIG. 5(b). You will be killed.

In this way, the lubricating oil storage mechanism 200 can supply lubricating oil to the rolling bearing 140 when the vehicle is started. Then, while the vehicle is being driven (the wheels are rotating), centrifugal force is applied to the lubricating oil storage mechanism 200, so no lubricating oil is stored.

As explained above, the lubricating oil storage mechanism 200 of this embodiment can store lubricating oil when the vehicle stops. Further, the lubricating oil storage mechanism 200 can supply the lubricating oil stored to the lubricating surface of the rolling bearing 140 when the vehicle is started. In other words, the lubricating oil storage mechanism 200 can supply lubricating oil to the lubricated surface when the rolling bearing 140 starts rotating. Thereby, the lubricating oil storage mechanism 200 can prevent the lubricating surface from seizing, and it becomes possible to avoid damage to the rolling bearing 140.

Further, the lubricating oil storage mechanism 200 can supply the stored lubricating oil to the lubricating surface of the rolling bearing 140 by rotating the differential case 120 (ring gear 110) without having a dedicated drive mechanism (actuator, etc.). Therefore, the lubricating oil storage mechanism 200 can supply lubricating oil at low cost.

In addition, since the lubricating oil storage mechanism 200 can supply lubricating oil to the lubricating surface when the rolling bearing 140 starts rotating, the lubricating oil's static oil surface is It becomes possible to make the height lower than the height H). Thereby, the lubricating oil storage mechanism 200 can reduce the stirring load caused by the ring gear 110 of the differential device 100, and it becomes possible to suppress deterioration of fuel efficiency.

Furthermore, by including the guide portion 270, the lubricating oil storage mechanism 200 can efficiently store (recover) the lubricating oil that has fallen from the wall surface of the upper portion 14 of the housing 10 into the storage portion main body 300.

Further, by including the protruding portion 220, the lubricating oil storage mechanism 200 can efficiently supply the lubricating oil stored in the storage portion main body 300 to the lubricated surface of the rolling bearing 140.

[Modified example]
FIG. 6 is a diagram illustrating a lubricating oil storage mechanism according to a modification. FIG. 6(a) is a diagram illustrating a lubricating oil storage mechanism 400 according to a first modification. FIG. 6(b) is a diagram illustrating a lubricating oil storage mechanism 500 according to a second modification. FIG. 6(c) is a diagram illustrating a lubricating oil storage mechanism 600 according to a third modification. In addition, in FIG. 6(a), lubricating oil is shown filled in black.

[First modification]
As shown in FIG. 6A, a lubricating oil storage mechanism 400 according to the first modification includes a storage unit 410 and a protrusion 220. Storage unit 410 includes a fixing part 430, a plurality of bottom parts 240, a plurality of wall parts 250, a plurality of partition parts 260, and a plurality of guide parts 270. Note that components that are substantially the same as those of the storage unit 210 are given the same reference numerals and descriptions thereof will be omitted.

The fixing part 430 has a disk shape, and has a circular opening formed in the center. The inner diameter of the fixed portion 430 is smaller than the inner diameter 126 of the differential case 120. The outer diameter of the fixed portion 430 is larger than the inner diameter 126 of the differential case 120 and smaller than the inner diameter of the inner ring portion 142. The fixing portion 430 is fitted into a groove 126a formed in the inner diameter 126 of the differential case 120.

The bottom portion 240 is connected to the fixed portion 430 and extends outward in the direction of the rotation axis (+X-axis direction in FIG. 6(a)). Therefore, the bottom 240 of the lubricating oil storage mechanism 400 has a longer length in the rotation axis direction than the bottom 240 of the lubricating oil storage mechanism 200. Further, a space is formed between the bottom 240 of the lubricating oil storage mechanism 400 and the inner diameter 126 of the differential case 120, and lubricating oil can also be stored in this space.

As explained above, the lubricating oil storage mechanism 400 of the first modification can store a large amount of lubricating oil compared to the lubricating oil storage mechanism 200.

[Second modification]
As shown in FIG. 6(b), a lubricating oil storage mechanism 500 according to the second modification includes a storage unit 210 and a protrusion 520. Note that components that are substantially the same as those of the storage unit 210 are given the same reference numerals and descriptions thereof will be omitted.

The protruding portion 520 includes a main body 522, a protruding portion 524, and a tapered portion 526. The main body 522 is provided on the outer ring portion 144 of the rolling bearing 140 and protrudes outward in the rotational axis direction (+X-axis direction in FIG. 6(b)). The protruding portion 524 protrudes inward in the radial direction of the outer ring portion 144 from the tip of the main body 522. The tip of the protrusion 524 is separated from the inner ring portion 142 (storage unit 210). The tapered portion 526 continues from the proximal end of the protrusion 524 toward the inner diameter side of the outer ring portion 144 and slopes radially outward from the protrusion 524 toward the outer ring portion 144 .

As explained above, since the lubricating oil storage mechanism 500 of the second modification includes the protruding part 520 (protruding part 524), the lubricating oil moved by centrifugal force can be moved to the lubricating surface side of the rolling bearing 140. Can be done. This makes it possible to suppress movement of lubricating oil to the outside of the rolling bearing 140. Further, since the lubricating oil storage mechanism 500 includes the tapered portion 526, the lubricating oil can be smoothly supplied to the lubricating surface of the rolling bearing 140.

[Third modification]
As shown in FIG. 6(c), a lubricating oil storage mechanism 600 according to the third modification includes a storage unit 610 and a protrusion 220. Storage unit 610 includes a fixing part 230, a plurality of bottom parts 640, a plurality of wall parts 250, a plurality of partition parts 260, and a plurality of guide parts 270. Note that components that are substantially the same as those of the storage unit 210 are given the same reference numerals and descriptions thereof will be omitted.

The bottom portion 640 is depressed (curved) inward in the radial direction (±Z-axis direction in FIG. 6(c)). Thereby, the lubricating oil storage mechanism 600 according to the third modification can store a large amount of lubricating oil compared to the lubricating oil storage mechanism 200.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to these embodiments. It is clear that those skilled in the art can come up with various changes and modifications within the scope of the claims, and it is understood that these naturally fall within the technical scope of the present invention. be done.

In addition, in the said embodiment, the lubricating oil storage mechanism 200 mentioned the structure provided with six bottom parts 240 (six bottom parts 240 form the hexagonal cylinder 242) as an example. In other words, an example is given in which the lubricating oil storage mechanism 200 includes six storage section bodies 300. However, the number of reservoir main bodies 300 is not limited as long as a plurality of them are provided in the circumferential direction of the end surface 124 of the differential case 120 in the rotation axis direction or the end surface 142a of the inner ring part 142 of the rolling bearing 140 in the rotation axis direction. For example, the lubricating oil storage mechanism 200 may include eight storage main bodies 300. In this case, eight bottom portions 240 may be provided, and the eight bottom portions 240 may form an octagonal cylinder.

Further, in the above embodiment, the case where the outer diameter of the fixing portion 230 is substantially equal to the outer diameter of the inner ring portion 142 has been exemplified. However, the outer diameter of the fixing portion 230 may be smaller than the outer diameter of the inner ring portion 142.

Further, in the above embodiment, an example is given in which a plurality of storage section main bodies 300 are provided in the circumferential direction of the end surface 142a in the rotation axis direction of the inner ring section 142. However, a plurality of reservoir main bodies 300 may be provided in the circumferential direction of the end surface 124 of the differential case 120 in the rotation axis direction.

Further, in the embodiment described above, the configuration in which the storage section main body 300 includes the guide section 270 has been exemplified. However, the guide portion 270 is not an essential component. When the guide portion 270 is not provided, the tip of the wall portion 250 of the storage portion main body 300 is preferably located further outward than the protrusion portion 220 in the rotation axis direction. Thereby, the lubricating oil that has fallen from the upper part 14 of the housing 10 can be efficiently stored (recovered) in the storage section main body 300.

Further, in the above embodiment, the storage section main body 300 is provided in the differential case 120 fixed to the small diameter side of the inner ring section 142 of the rolling bearing 140. However, the reservoir main body 300 may be provided on the small diameter side of the inner ring portion 142 of the rolling bearing 140. Further, the reservoir main body 300 may be provided on the larger diameter side of the inner ring portion 142 of the rolling bearing 140 or on the differential case 120 fixed to the larger diameter side of the inner ring portion 142.

Further, in the above embodiment, the rolling bearings 130 and 140 are tapered roller bearings. However, the rolling bearings 130 and 140 may be other rolling bearings including an inner ring portion, an outer ring portion, and rolling elements provided between the inner ring portion and the outer ring portion. The rolling bearings 130, 140 may be, for example, ball bearings, roller bearings, needle bearings, or spherical roller bearings.

Further, in the above embodiment, the differential case 120 is taken as an example of the rotating body body that is fixed to the inner ring portion 142 of the rolling bearing 140 and rotates together with the inner ring portion 142. However, there is no limitation on the rotating body.

INDUSTRIAL APPLICATION This invention can be utilized for a lubricating oil storage mechanism.

200, 400, 500, 600 Lubricating oil storage mechanism 220, 520 Projection portions 240, 640 Bottom portion 250 Wall portion (side portion)
260 Partition (side)
270 Guide part 300 Storage part main body

Claims (5)

A plurality of reservoir bodies are provided in the circumferential direction of the end face in the direction of the rotation axis of a rotating body main body that is fixed to the inner ring part of the rolling bearing and rotates together with the inner ring part, or the end face in the direction of the rotation axis of the inner ring part,
The storage section main body is
a bottom portion connected to the inner ring portion or the rotating body main body and extending outward of the rolling bearing in the rotation axis direction;
a side portion standing radially outward of the inner ring portion from the bottom portion;
a guide portion extending from a tip of the side portion outward of the rolling bearing in the direction of the rotation axis;
has
A lubricating oil storage mechanism in which lubricating oil is stored in a space surrounded by the bottom part and the side part while the vehicle is stopped. A plurality of reservoir bodies are provided in the circumferential direction of the end face in the direction of the rotation axis of a rotating body main body that is fixed to the inner ring part of the rolling bearing and rotates together with the inner ring part, or the end face in the direction of the rotation axis of the inner ring part,
The storage section main body is
a bottom portion connected to the inner ring portion or the rotary body body and extending outward of the rolling bearing in the rotational axis direction from the rotor body side beyond the outer diameter side end face of the inner ring portion;
a side portion standing radially outward of the inner ring portion from the bottom portion;
a guide portion extending from a tip of the side portion outward of the rolling bearing in the direction of the rotation axis;
has
A lubricating oil storage mechanism in which lubricating oil is stored in a space surrounded by the bottom part and the side parts. A plurality of reservoir bodies are provided in the circumferential direction of the end face in the direction of the rotation axis of a rotating body main body that is fixed to the inner ring part of the rolling bearing and rotates together with the inner ring part, or the end face in the direction of the rotation axis of the inner ring part,
The storage section main body is
a bottom portion connected to the inner ring portion or the rotating body main body and extending outward of the rolling bearing in the rotation axis direction;
a side portion standing radially outward of the inner ring portion from the bottom portion;
a guide portion extending from the tip of the side portion to the outside of the rolling bearing in the direction of the rotation axis;
A lubricating oil storage mechanism in which lubricating oil is stored in a space surrounded by the bottom part and the side parts. The outer ring portion of the rolling bearing includes a protrusion that protrudes outward of the rolling bearing in the direction of the rotational axis than the inner ring portion,
4 . The tip of the side portion of the storage portion main body or the tip of the guide portion according to any one of claims 1 to 3 is located outside of the rolling bearing in the direction of the rotational axis than the protrusion. Lubricating oil storage mechanism. The rolling bearing is a tapered roller bearing,
The lubricating oil storage mechanism according to any one of claims 1 to 4 , wherein the storage portion main body is provided on the small diameter side of the inner ring portion or on the rotating body main body fixed to the small diameter side of the inner ring portion.

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