JP2008032042A - Rolling bearing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing device having a fitting member capable of suppressing the creep between a fitting member and a race to which the fitting member is fixed. <P>SOLUTION: This rolling bearing device comprises a ball bearing 1 and a damping member 2 formed of a damping alloy of interface type. The inner peripheral surface 10 of the damping member 2 is fixedly fitted onto the outer peripheral surface 20 of an outer ring 6 at a room temperature. The outer peripheral surfaces 13, 14 of the damping member 2 are fixedly fitted into the axial end parts 21, 22 of the inner peripheral surface of the outer ring 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rolling bearing device including a rolling bearing and a damping member made of a damping material. In particular, the present invention relates to a rolling bearing device suitable for use as a shaft support bearing in a transmission of a vehicle.

  Conventionally, as a rolling bearing device, there is one described in JP 2004-108539 A (Patent Document 1).

  The rolling bearing device includes an inner ring, an outer ring, a ball, a first damping member, and a second damping member. The inner ring, outer ring, and ball are made of steel, while the first and second damping members are made of twin-type damping alloy material. The first and second damping members have a U-shaped cross section in the axial cross section of the ball bearing. The first damping member is fitted and fixed to the outer ring so as to contact the outer peripheral surface of the outer ring and the end surfaces on both sides in the axial direction of the outer ring, while the second damping member is the inner peripheral surface of the inner ring. And is fitted and fixed to the inner ring so as to abut against the end faces on both sides in the axial direction of the inner ring.

  In the conventional rolling bearing device, the first and second damping members have a U-shaped cross section so that the damping member can be easily assembled to the ball bearing.

  However, in the above-described conventional rolling bearing device, the damping member is made of a twin-type damping alloy material having a linear expansion coefficient larger than that of the steel material, so that the fitting between the damping member and the race ring is performed in a normal temperature range. When the tightening allowance is set small, the fitting between the damping member and the raceway may become loose in a high temperature range. In this case, creep occurs between the damping member and the raceway. Will occur.

On the other hand, in order to avoid the above-mentioned problem of creep, if the tightening allowance between the damping member and the raceway ring is set large in the normal temperature range, the bearing race may be deformed. The smooth rolling of the ball will be hindered.
JP 2004-108539 A

  Then, the subject of this invention is providing the rolling bearing apparatus which has a fitting member which can suppress the creep between a fitting member and a bearing ring, and can also suppress the deformation | transformation of the raceway surface of a bearing ring. is there. Another object of the present invention is to provide a rolling bearing device having vibration damping properties that can suppress creep between the vibration damping member and the bearing ring and also can suppress deformation of the raceway surface of the bearing ring. is there.

In order to solve the above problems, the rolling bearing device of the present invention is
A rolling bearing having an inner ring, an outer ring and rolling elements;
A fitting member having an annular groove;
The annular groove has a first peripheral surface capable of contacting the outer peripheral surface of the outer ring and a second peripheral surface capable of contacting the inner peripheral surface of the outer ring,
Below the first predetermined temperature, the inner peripheral surface of the outer ring is fitted with a tight margin on the second peripheral surface of the fitting member opposed to the inner peripheral surface in the radial direction, The outer peripheral surface of the outer ring has a tightening margin on the first peripheral surface of the fitting member that is radially opposed to the outer peripheral surface at a second predetermined temperature that is lower than the first predetermined temperature by a predetermined temperature. It is characterized by being fitted with.

  The predetermined temperature is a positive temperature including 0 ° C. Therefore, the first predetermined temperature and the second predetermined temperature may be the same temperature.

  According to the present invention, the fitting member can be reliably fixed to the outer ring at all temperatures, and creep does not occur between the fitting member and the outer ring.

  In order to realize the present invention, for example, the linear expansion coefficient of the fitting member is the same as the linear expansion coefficient of the outer ring, or the linear expansion coefficient of the fitting member is smaller than the linear expansion coefficient of the outer ring. Between the outer peripheral surface of the outer ring and the inner peripheral surface of the fitting member corresponding to the first peripheral surface, and between the inner peripheral surface of the outer ring and the outer peripheral surface of the fitting member corresponding to the second peripheral surface. The gap may be fitted at a normal temperature (in this specification, normal temperature is defined as 60 ° C. to 80 ° C.) with a tightening margin that does not deform the raceway surface of the outer ring. In this way, the present invention can be realized, and at any temperature, between the outer peripheral surface of the outer ring and the inner peripheral surface of the fitting member corresponding to the first peripheral surface, and the inner peripheral surface of the outer ring, At least one of the space between the outer peripheral surface of the fitting member corresponding to the second peripheral surface can be fitted with a tightening margin.

  Specifically, when the linear expansion coefficient of the fitting member is the same as the linear expansion coefficient of the outer ring, the fitting between the outer peripheral surface of the outer ring and the inner peripheral surface of the fitting member corresponding to the first peripheral surface, and The fitting between the inner circumferential surface of the outer ring and the outer circumferential surface of the fitting member corresponding to the second circumferential surface does not change due to temperature fluctuations. Therefore, at normal temperature, between the outer peripheral surface of the outer ring and the inner peripheral surface of the fitting member corresponding to the first peripheral surface, and the outer periphery of the fitting member corresponding to the inner peripheral surface of the outer ring and the second peripheral surface If the outer ring raceway surface is fitted with a tightening margin that does not deform, the fitting member and the outer ring are fitted with the tightening margin at any temperature. Therefore, creep can be prevented from occurring between the fitting member and the outer ring.

  Further, when the linear expansion coefficient of the fitting member is smaller than the linear expansion coefficient of the outer ring, at normal temperature, between the outer peripheral surface of the outer ring and the inner peripheral surface of the fitting member corresponding to the first peripheral surface, and When fitting between the inner peripheral surface of the outer ring and the outer peripheral surface of the fitting member corresponding to the second peripheral surface with a tightening margin that does not deform the raceway surface of the outer ring, In the region where the temperature is high, the fitting between the inner peripheral surface of the outer ring and the outer peripheral surface of the fitting member corresponding to the second peripheral surface may be loose, but in that region, the outer peripheral surface of the outer ring, The fitting with the inner circumferential surface of the fitting member corresponding to one circumferential surface is a fitting with a larger tightening margin than at normal temperature.

  On the other hand, in the region where the temperature is lower than normal temperature, due to the difference in coefficient of linear expansion between the fitting member and the outer ring, the fitting between the outer peripheral surface of the outer ring and the inner peripheral surface of the fitting member corresponding to the first peripheral surface. The fitting may be loose, but in that region, the fitting between the inner peripheral surface of the outer ring and the outer peripheral surface of the fitting member corresponding to the second outer peripheral surface is larger than the normal temperature. It becomes a mating.

  Therefore, at any temperature, the fitting member and the outer ring can be fitted with a tightening margin, and creep can be prevented from occurring between the fitting member and the outer ring.

The rolling bearing device of the present invention is
A rolling bearing having an inner ring, an outer ring and rolling elements;
A fitting member having an annular groove;
The annular groove has a first peripheral surface capable of contacting the outer peripheral surface of the outer ring and a second peripheral surface capable of contacting the inner peripheral surface of the outer ring,
Below the first predetermined temperature, the outer peripheral surface of the outer ring is fitted with a tight margin on the first peripheral surface of the fitting member that is radially opposed to the outer peripheral surface. 1 Above the second predetermined temperature which is lower than the predetermined temperature by a predetermined temperature, the inner peripheral surface of the outer ring has a margin on the second peripheral surface of the fitting member which is radially opposed to the inner peripheral surface It is characterized by being fitted with.

  The predetermined temperature is a positive temperature including 0 ° C. Therefore, the first predetermined temperature and the second predetermined temperature may be the same temperature.

  According to the present invention, the fitting member can be reliably fixed to the outer ring at all temperatures, and creep does not occur between the fitting member and the outer ring.

  In order to realize the present invention, for example, when the linear expansion coefficient of the fitting member is the same as the linear expansion coefficient of the outer ring, or when the linear expansion coefficient of the fitting member is larger than the linear expansion coefficient of the outer ring. Between the outer peripheral surface of the outer ring and the inner peripheral surface of the fitting member corresponding to the first peripheral surface, and between the inner peripheral surface of the outer ring and the outer peripheral surface of the fitting member corresponding to the second peripheral surface. What is necessary is just to make it fit in the state which has the allowance of the grade which the track surface of an outer ring | wheel does not deform | transform at room temperature. In this way, the present invention can be realized, and at any temperature, between the outer peripheral surface of the outer ring and the inner peripheral surface of the fitting member corresponding to the first peripheral surface, and the inner peripheral surface of the outer ring, At least one of the space between the outer peripheral surface of the fitting member corresponding to the second peripheral surface can be fitted with a tightening margin.

  Specifically, when the linear expansion coefficient of the fitting member is the same as the linear expansion coefficient of the outer ring, the fitting between the outer peripheral surface of the outer ring and the inner peripheral surface of the fitting member corresponding to the first peripheral surface, and The fitting between the inner circumferential surface of the outer ring and the outer circumferential surface of the fitting member corresponding to the second circumferential surface does not change due to temperature fluctuations. Therefore, at normal temperature, between the outer peripheral surface of the outer ring and the inner peripheral surface of the fitting member corresponding to the first peripheral surface, and the outer periphery of the fitting member corresponding to the inner peripheral surface of the outer ring and the second peripheral surface If the outer ring raceway surface is fitted with a tightening margin that does not deform, the fitting member and the outer ring are fitted with the tightening margin at any temperature. Therefore, creep can be prevented from occurring between the fitting member and the outer ring.

  Next, when the linear expansion coefficient of the fitting member is larger than the linear expansion coefficient of the outer ring, at normal temperature, between the outer peripheral surface of the outer ring and the inner peripheral surface of the fitting member corresponding to the first peripheral surface, and If the inner ring surface of the outer ring and the outer surface of the fitting member corresponding to the second peripheral surface are fitted with a tightening margin that does not deform the outer ring raceway surface, Due to the difference in coefficient of linear expansion between the fitting member and the outer ring, the fitting between the outer circumferential surface of the outer ring and the inner circumferential surface of the fitting member corresponding to the first circumferential surface is loose in a higher temperature region. In that region, the fitting between the inner circumferential surface of the outer ring and the outer circumferential surface of the fitting member corresponding to the second circumferential surface is a fitting with a larger tightening margin than at normal temperature. Become.

  On the other hand, in the region where the temperature is lower than normal temperature, the fitting between the inner peripheral surface of the outer ring and the outer peripheral surface of the fitting member corresponding to the second peripheral surface is caused by the difference in the linear expansion coefficient between the fitting member and the outer ring. The fit may be loose, but in that area, the fitting between the outer peripheral surface of the outer ring and the inner peripheral surface of the fitting member corresponding to the first outer peripheral surface is larger than the normal temperature. It becomes a mating.

  Therefore, at any temperature, the fitting member and the outer ring can be fitted with a tightening margin, and creep can be prevented from occurring between the fitting member and the outer ring.

The rolling bearing device of the present invention is
A rolling bearing having an inner ring, an outer ring and rolling elements;
A fitting member having an annular groove;
The annular groove has a first peripheral surface capable of contacting the inner peripheral surface of the inner ring, and a second peripheral surface capable of contacting the outer peripheral surface of the inner ring,
Below the first predetermined temperature, the inner peripheral surface of the inner ring is fitted with a tight margin on the first peripheral surface of the fitting member that is radially opposed to the inner peripheral surface, The outer peripheral surface of the inner ring has a tightening margin on the second peripheral surface of the fitting member that is radially opposed to the outer peripheral surface at a second predetermined temperature that is lower than the first predetermined temperature by a predetermined temperature. It is characterized by being fitted with.

  The predetermined temperature is a positive temperature including 0 ° C. Therefore, the first predetermined temperature and the second predetermined temperature may be the same temperature.

  According to the present invention, the fitting member can be reliably fixed to the inner ring at all temperatures, and creep does not occur between the fitting member and the inner ring.

  In order to realize the present invention, for example, when the linear expansion coefficient of the fitting member is the same as the linear expansion coefficient of the inner ring, or when the linear expansion coefficient of the fitting member is smaller than the linear expansion coefficient of the inner ring Between the inner peripheral surface of the inner ring and the outer peripheral surface of the fitting member corresponding to the first peripheral surface, and between the outer peripheral surface of the inner ring and the inner peripheral surface of the fitting member corresponding to the second peripheral surface. What is necessary is just to make it fit in the state which has the allowance of the grade which the track surface of an inner ring | wheel does not deform | transform at room temperature. In this way, the present invention can be realized, and at any temperature, between the inner peripheral surface of the inner ring and the outer peripheral surface of the fitting member corresponding to the first peripheral surface, and the outer peripheral surface of the inner ring, Fasten at least one of the inner circumferential surface of the fitting member corresponding to the two circumferential surfaces and between the outer circumferential surface of the inner ring and the inner circumferential surface of the fitting member corresponding to the second circumferential surface. It can be fitted in a state having a margin.

  Specifically, when the linear expansion coefficient of the fitting member is the same as the linear expansion coefficient of the inner ring, the fitting between the inner peripheral surface of the inner ring and the outer peripheral surface of the fitting member corresponding to the first peripheral surface, and The fitting between the outer circumferential surface of the inner ring and the inner circumferential surface of the fitting member corresponding to the second circumferential surface does not change due to temperature fluctuations. Therefore, at normal temperature, between the inner peripheral surface of the inner ring and the outer peripheral surface of the fitting member corresponding to the first peripheral surface, and the inner periphery of the fitting member corresponding to the outer peripheral surface of the inner ring and the second peripheral surface. When the inner ring raceway surface is fitted with a tightening allowance that does not deform the inner ring, the fitting member and the inner ring fit with the tightening allowance at any temperature. It is possible to prevent the occurrence of creep between the fitting member and the inner ring.

  Further, when the linear expansion coefficient of the fitting member is smaller than the linear expansion coefficient of the inner ring, at normal temperature, between the inner peripheral surface of the inner ring and the outer peripheral surface of the fitting member corresponding to the first peripheral surface, and When fitting between the outer peripheral surface of the inner ring and the inner peripheral surface of the fitting member corresponding to the second peripheral surface with a tightening margin that does not deform the raceway surface of the inner ring, In a region where the temperature is high, the fitting between the inner peripheral surface of the inner ring and the outer peripheral surface of the fitting member corresponding to the first peripheral surface may be loose, but in that region, the outer peripheral surface of the inner ring, The fitting between the inner circumferential surface of the fitting member corresponding to the two circumferential surfaces is a fitting with a larger tightening allowance than at normal temperature.

  On the other hand, in the region where the temperature is lower than normal temperature, the fitting between the outer peripheral surface of the inner ring and the inner peripheral surface of the fitting member corresponding to the second peripheral surface is caused by the difference in the linear expansion coefficient between the fitting member and the inner ring. The fitting may be loose, but in that region, the fitting between the inner circumferential surface of the inner ring and the outer circumferential surface of the fitting member corresponding to the first outer circumferential surface is larger than the normal temperature. It becomes a mating.

  Therefore, the fitting member and the inner ring can be fitted with a tightening margin at any temperature, and creep can be prevented from occurring between the fitting member and the inner ring.

The rolling bearing device of the present invention is
A rolling bearing having an inner ring, an outer ring and rolling elements;
A fitting member having an annular groove;
The annular groove has a first peripheral surface capable of contacting the inner peripheral surface of the inner ring, and a second peripheral surface capable of contacting the outer peripheral surface of the inner ring,
Below the first predetermined temperature, the outer peripheral surface of the inner ring is fitted with a tight margin on the second peripheral surface of the fitting member that is radially opposed to the outer peripheral surface. 1 Above the second predetermined temperature which is lower than the predetermined temperature by a predetermined temperature, the inner peripheral surface of the inner ring has a tightening margin on the first peripheral surface of the fitting member opposed to the inner peripheral surface in the radial direction It is characterized by being fitted with.

  The predetermined temperature is a positive temperature including 0 ° C. Therefore, the first predetermined temperature and the second predetermined temperature may be the same temperature.

  According to the present invention, the fitting member can be reliably fixed to the inner ring at all temperatures, and creep does not occur between the fitting member and the inner ring.

  In order to realize the present invention, for example, when the linear expansion coefficient of the fitting member is the same as the linear expansion coefficient of the inner ring, or when the linear expansion coefficient of the fitting member is larger than the linear expansion coefficient of the inner ring Between the inner peripheral surface of the inner ring and the outer peripheral surface of the fitting member corresponding to the first peripheral surface, and between the outer peripheral surface of the inner ring and the inner peripheral surface of the fitting member corresponding to the second peripheral surface. What is necessary is just to make it fit in the state which has the allowance of the grade which the track surface of an inner ring | wheel does not deform | transform at room temperature. In this way, the present invention can be realized, and at any temperature, between the inner peripheral surface of the inner ring and the outer peripheral surface of the fitting member corresponding to the first peripheral surface, and the outer peripheral surface of the inner ring, Fasten at least one of the inner circumferential surface of the fitting member corresponding to the two circumferential surfaces and between the outer circumferential surface of the inner ring and the inner circumferential surface of the fitting member corresponding to the second circumferential surface. It can be fitted in a state having a margin.

  Specifically, when the linear expansion coefficient of the fitting member is the same as the linear expansion coefficient of the inner ring, the fitting between the inner peripheral surface of the inner ring and the outer peripheral surface of the fitting member corresponding to the first peripheral surface, and The fitting between the outer circumferential surface of the inner ring and the inner circumferential surface of the fitting member corresponding to the second circumferential surface does not change due to temperature fluctuations. Therefore, at normal temperature, between the inner peripheral surface of the inner ring and the outer peripheral surface of the fitting member corresponding to the first peripheral surface, and the inner periphery of the fitting member corresponding to the outer peripheral surface of the inner ring and the second peripheral surface. When the inner ring raceway surface is fitted with a tightening allowance that does not deform the inner ring, the fitting member and the inner ring fit with the tightening allowance at any temperature. It is possible to prevent the occurrence of creep between the fitting member and the inner ring.

  Next, when the linear expansion coefficient of the fitting member is larger than the linear expansion coefficient of the inner ring, at normal temperature, between the inner peripheral surface of the inner ring and the outer peripheral surface of the fitting member corresponding to the first peripheral surface, and When the inner ring and the inner peripheral surface of the fitting member corresponding to the second peripheral surface are fitted with a tight margin that does not deform the inner ring raceway surface, In a region where the temperature is higher, the fitting between the outer peripheral surface of the inner ring and the inner peripheral surface of the fitting member corresponding to the second peripheral surface may become loose, but in that region, the inner peripheral surface of the inner ring The fitting with the outer peripheral surface of the fitting member corresponding to the first peripheral surface is a fitting with a larger tightening margin than at normal temperature.

  On the other hand, in the region where the temperature is lower than normal temperature, the fitting between the inner peripheral surface of the inner ring and the outer peripheral surface of the fitting member corresponding to the first peripheral surface is caused by the difference in the linear expansion coefficient between the fitting member and the inner ring. The fitting may be loose, but in that area, the fitting between the outer peripheral surface of the inner ring and the inner peripheral surface of the fitting member corresponding to the second outer peripheral surface is larger than the normal temperature. It becomes a mating.

  Therefore, the fitting member and the inner ring can be fitted with a tightening margin at any temperature, and creep can be prevented from occurring between the fitting member and the inner ring.

  Moreover, as for the rolling bearing apparatus of one Embodiment, the said 2nd surrounding surface exists in the both sides of the axial direction of the said rolling element.

  According to the embodiment, since the second peripheral surface exists on both sides in the axial direction of the rolling element, the inner peripheral surface of the outer ring (or the outer peripheral surface of the inner ring) corresponds to the second peripheral surface. The force locked to the outer peripheral surface of the fitting member (or the inner peripheral surface of the fitting member) can be increased.

  Further, according to the embodiment, the second peripheral surface is present on both sides in the axial direction of the rolling element, and the second peripheral surface is present only on one side in the axial direction of the rolling element. Since the mass of the fitting member is large, when the fitting member is a damping member, the mass effect, that is, the effect of increasing the damping performance of the damping member as the mass of the damping member increases. Therefore, the vibration damping property can be improved.

  In the rolling bearing device of one embodiment, the fitting member is a vibration damping member made of a vibration damping material.

  According to the embodiment, since the fitting member is a damping member made of a damping material, the fitting member can attenuate the vibration and reduce the energy of vibration transmitted to the rolling bearing. be able to. Therefore, it can suppress that the malfunction resulting from a vibration generate | occur | produces in a rolling bearing.

  Moreover, according to the said embodiment, the said fitting member is a damping member which consists of damping materials. In the present invention, since the vibration damping member has a configuration in which both the outer circumferential surface and the inner circumferential surface of the raceway ring are held, the vibration damping member has a linear expansion coefficient larger or smaller than that of the steel material, and the steel depends on the temperature. The fitting between the bearing ring and the damping member made by a large fluctuation may cause loose fitting between the damping member and the bearing ring at high temperatures. Even if it is a vibration damping member made of a twin type vibration damping alloy material which has a problem that creep is likely to occur, the vibration damping member can be fixed to the raceway ring at any temperature.

  In one embodiment, the vibration damping material is a twin-type vibration damping alloy material.

  According to the embodiment, the damping material is a twin-type damping alloy material. In the present invention, since the damping member has a configuration in which both the outer peripheral surface and the inner peripheral surface of the raceway ring are held, the linear expansion coefficient is larger or smaller than that of the steel material, The fitting of the damping member varies greatly, and the fitting between the damping member and the raceway ring may become loose at high temperatures. Conventionally, creep is likely to occur between the raceway ring and the damping member. Even if a vibration damping member made of a twin-type vibration damping alloy material having the above problem is used, the vibration damping member can be fixed to the race ring without any problem at any temperature.

  In one embodiment, the vibration damping material is a ferromagnetic vibration damping alloy material.

  According to the embodiment, the damping material is a ferromagnetic damping alloy material. In the present invention, since the damping member has a configuration in which both the outer peripheral surface and the inner peripheral surface of the raceway ring are held, the linear expansion coefficient is larger or smaller than that of the steel material, The fitting of the damping member varies greatly, and the fitting between the damping member and the raceway ring may become loose at high temperatures. Conventionally, creep is likely to occur between the raceway ring and the damping member. Even if a vibration damping member made of a ferromagnetic vibration damping alloy material having the above problem is used, the vibration damping member can be fixed to the race ring without any problem at any temperature.

  Moreover, according to the said embodiment, the said damping material is a ferromagnetic type damping alloy material. In the present invention, since the damping member has a configuration in which both the outer peripheral surface and the inner peripheral surface of the raceway ring are held, the linear expansion coefficient is larger or smaller than that of the steel material, It is possible to prevent the vibration damping member from being excessively fitted and to suppress the vibration damping performance from being lowered. When the ferromagnetic damping material increases in fitting and the compressive strain increases, the loss factor decreases and the damping performance decreases. If the loss factor of the damping member and the loss factor of the inner ring or outer ring to which the damping member is fitted are the same, the damping performance of the damping member is the same as that of the inner or outer ring to which the damping member is fitted. turn into.

  According to the rolling bearing device of the present invention, it is possible to prevent deformation of the raceway surface of the bearing ring (inner ring or outer ring) and to prevent creep between the race ring and the fitting member at any temperature.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is an axial sectional view of a rolling bearing device according to a first embodiment of the present invention.

  This rolling bearing device includes a ball bearing 1 as an example of a rolling bearing and a damping member 2 as a fitting member.

  The ball bearing 1 includes an inner ring 5, an outer ring 6, and a ball 7 as an example of a rolling element. Inner ring 5, outer ring 6 and ball 7 are made of high carbon chromium bearing steel (SUJ2). The inner ring 5 is externally fitted and fixed to a rotating shaft (not shown) of a machine tool or the like on which the rolling bearing device is installed. The balls 7 are spaced by a predetermined distance in the circumferential direction while being held by a cage (not shown) between the raceway groove as the raceway surface of the inner ring 5 and the raceway groove as the raceway surface of the outer ring 6. A plurality are arranged apart.

  The damping member 2 is made of a twin type damping alloy material. The linear expansion coefficient of the damping member 2 is larger than the linear expansion coefficient of the outer ring 6. Here, examples of the twin type vibration damping alloy material include a Mn—Cu alloy, a Cu—Al—Ni alloy, and a Ti—Ni alloy.

  As shown in FIG. 1, the damping member 2 has an annular groove having a substantially convex cross section. Specifically, the damping member 2 has a rectangular cross-section having an internal space with a rectangular cross section in a half cross section in the axial direction of the outer ring 6 (a half region with the central axis of the outer ring 6 as a boundary). Of the two frames extending in the direction, the central portion in the longitudinal direction of the frame portion located radially inward has a shape that is cut off.

  That is, the damping member 2 has an outer surface that abuts on the outer surface portion of the outer ring 6 excluding the central portion of the inner peripheral surface of the outer ring 6 including the raceway groove of the outer ring 6. Specifically, the annular groove has a first peripheral surface that contacts the outer peripheral surface 20 of the outer ring 6, a first end surface that contacts one end surface of the outer ring 6 in the axial direction, and the other end of the outer ring 6 in the axial direction. A second end surface that contacts the end surface, a first second peripheral surface as a second peripheral surface that contacts the end portion 21 on the one side in the axial direction on the inner peripheral surface of the outer ring 6, and the inner periphery of the outer ring 6 And a second second peripheral surface as a second peripheral surface in contact with the end 22 on the other side in the axial direction of the surface.

  In other words, the vibration damping member 2 includes the inner peripheral surface 10 corresponding to the first peripheral surface, the axial end surface 11 that contacts the end surface on one side of the outer ring 6 in the axial direction, and the other axial direction of the outer ring 6. An end face 12 in the axial direction that comes into contact with the end face on the left side, an outer peripheral face 13 corresponding to the first second peripheral face, and an outer peripheral face 14 corresponding to the second second peripheral face.

  The outermost outer peripheral surface 18 in the radial direction of the vibration damping member 2 is tightly fitted to an inner peripheral surface 40 of a housing 19 such as a machine tool in which the rolling bearing device is installed. The inner peripheral surface 10 of the damping member 2 is tightly fitted to the outer peripheral surface 20 of the outer ring 6 at room temperature, while the outer peripheral surface of the damping member 2 is located radially inward of the outer ring 6. Reference numerals 13 and 14 are fitted into the end portions 21 and 22 of the inner peripheral surface of the outer ring 6. In other words, at normal temperature, the inner peripheral surface 10 of the damping member 2 is externally fitted and fixed to the outer peripheral surface 20 of the outer ring 6, while the outer peripheral surfaces 13 and 14 of the vibration damping member 2 are within the outer ring 6. The inner ends 21 and 22 of the peripheral surface are fitted and fixed.

  The vibration damping member 2 has a structure that can be divided into two with a vertical bisector of the central axis of the outer ring 6 as a boundary. When the damping member 2 is assembled to the outer ring 6, after one portion of the damping member 2 is assembled to one side of the outer ring 6 in the axial direction, the damping member is arranged to the other side of the outer ring 6 in the axial direction. 2 is assembled, and the damping member 2 is assembled to the outer ring 6.

  According to the rolling bearing device of the first embodiment, the damping member 2 has an inner peripheral surface 10 that contacts the outer peripheral surface 20 of the outer ring 6 and an outer periphery that contacts the end portions 21 and 22 of the inner peripheral surface of the outer ring 6. The outer peripheral surface 20 of the damping member 2 and the outer peripheral surface 20 of the outer ring 6, and the outer peripheral end portions 21 and 22 of the outer ring 6 and the outer periphery of the damping member 2. Since the raceway groove of the outer ring 6 is fitted between the surfaces 13 and 14 in such a state that the raceway groove of the outer ring 6 is not deformed at room temperature, the deformation of the raceway groove of the outer ring 6 is suppressed at any temperature. And between the inner circumferential surface 10 of the damping member 2 and the outer circumferential surface 20 of the outer ring 6, and the end portions 21 and 22 of the inner circumferential surface of the outer ring 6 and the outer circumferential surfaces 13 and 14 of the damping member 2. At least one of the gaps can be fitted with a tightening margin.

  Specifically, in the first embodiment, since the linear expansion coefficient of the damping member 2 is larger than the linear expansion coefficient of the outer ring 6, the inner circumferential surface 10 of the damping member 2 and the outer circumferential surface 20 of the outer ring 6 are And between the end portions 21 and 22 of the inner peripheral surface of the outer ring 6 and the outer peripheral surfaces 13 and 14 of the damping member 2 with a tightening margin that does not deform the raceway groove of the outer ring 6. When fitted, the inner circumferential surface 10 of the damping member 2 and the outer circumferential surface 20 of the outer ring 6 are caused by the difference in linear expansion coefficient between the damping member 2 and the outer ring 6 in a region where the temperature is higher than normal temperature. In this region, the fitting between the outer peripheral surfaces 13 and 14 of the damping member 2 and the end portions 21 and 22 of the inner peripheral surface of the outer ring 6 is tightened more than at normal temperature. The fitting is in a state where the allowance is large.

  On the other hand, in the region where the temperature is lower than normal temperature, due to the difference in the coefficient of linear expansion between the damping member 2 and the outer ring 6, the outer peripheral surfaces 13 and 14 of the damping member 2 and the end portions 21 of the inner peripheral surface of the outer ring 6. In this region, the fitting between the inner peripheral surface 10 of the damping member 2 and the outer peripheral surface 20 of the outer ring 6 is more tight than the normal temperature. It becomes a fitting.

  Therefore, the damping member 2 and the outer ring 6 can be fitted with a tightening margin at any temperature, and the fitting between the damping member 2 and the outer ring 6 is weakened to a predetermined level or less. Therefore, creep can be prevented from occurring between the vibration damping member 2 and the outer ring 6.

  In other words, in the first embodiment, the inner peripheral surface 10 of the vibration damping member 2 and the outer peripheral surface 20 of the outer ring 6 are in a state where there is a tightening margin in the region of the normal temperature or the first predetermined temperature not lower than the normal temperature. The end portions 21 and 22 of the inner peripheral surface of the outer ring 6 and the outer peripheral surface 13 of the damping member 2 at a normal temperature or higher than a second predetermined temperature (a temperature equal to or lower than the first predetermined temperature). 14 is fitted with a tightening allowance. For this reason, in the first embodiment, the damping member 2 can be reliably fixed to the outer ring 6 in all temperature ranges.

  Further, according to the rolling bearing device of the first embodiment, the outer peripheral surfaces 13 and 14 of the vibration damping member 2 fitted to the inner peripheral surface of the outer ring 6 are present on both sides in the axial direction of the ball 7. The force for locking the damping member 2 to the outer ring 6 can be increased.

  Further, according to the rolling bearing device of the first embodiment, the damping member 2 is disposed so as to surround the outer surface portion of the outer ring 6 excluding the central portion of the inner peripheral surface of the outer ring 6 including the raceway groove of the outer ring 6. And since the outer peripheral surfaces 13 and 14 of the damping member 2 exist in the both sides of the ball 9 in the axial direction, the mass of the damping member 2 can be remarkably increased. Therefore, the damping performance can be greatly improved by the mass effect, that is, the effect that the damping performance of the damping member increases as the mass of the damping member increases.

  In the rolling bearing device of the first embodiment, the inner and outer rings 5, 6 and the balls 7 are made of high carbon chrome bearing steel. In the present invention, at least one of the inner ring, the outer ring, and the rolling element is used. May consist of steel materials other than high carbon chromium bearing steel such as carburized hardened steel (SAE5120). Further, in the rolling bearing device of the first embodiment, the vibration damping member 2 is made of a twin-type vibration damping alloy material. However, in this invention, the vibration damping member has vibration damping rubber or vibration damping properties. It may be made of a resin material. The damping member may be made of any material as long as the material has damping properties.

  In the rolling bearing device of the first embodiment, the outer peripheral surfaces 13 and 14 of the damping member 2 that abuts on the inner peripheral surface of the outer ring 6 are present on both sides in the axial direction of the ball 7. Then, the outer peripheral surface of the damping member that contacts the inner peripheral surface of the outer ring may exist only on one side in the axial direction of the rolling element.

  In the rolling bearing device of the first embodiment, the non-separable vibration damping member 2 is used. However, in the present invention, the vibration damping member is a first vibration damping member having an inner peripheral surface that abuts the outer peripheral surface of the outer ring. While having a member and the outer peripheral surface contact | abutted to the inner peripheral surface of an outer ring | wheel, you may comprise by the 2nd damping member isolate | separated from the 1st damping member.

  Moreover, although the rolling bearing device of the said 1st Embodiment was the structure containing the ball bearing 1, the rolling bearing device of this invention is rolling other than ball bearings, such as a roller bearing (a cylindrical roller bearing, a tapered roller bearing). The structure including a bearing may be sufficient.

  Moreover, in the rolling bearing device of the first embodiment, as shown in FIG. 1, the openings between the inner ring 5 and the outer ring 6 are not sealed on both axial sides of the ball bearing 1. . However, in the present invention, the outer peripheral surface of the damping member that contacts the inner peripheral surface of the outer ring exists only on one side in the axial direction of the rolling element, and the opening on the other side in the axial direction between the inner and outer rings is provided. It may be sealed with a seal member (shield plate) made of a metal plate or a seal member having a metal cored bar and a rubber seal lip. Further, when the opening on the other side is sealed with a sealing member, the sealing member may have a structure that slides in contact with the rotating wheel, or a labyrinth structure that is non-contacting with the rotating wheel. May be.

  Moreover, in the rolling bearing device of the first embodiment, the cage that holds the ball 7 is used. However, when the rolling bearing device of the present invention includes a ball bearing, a crown-shaped cage is used as the cage. You may use, and you may use the holder | retainer of the structure formed by connecting between two annular parts with a some pillar part. In addition, the rolling bearing device of the present invention may have a structure without a cage, and the rolling bearing device of the present invention may have a so-called all-ball bearing.

  Further, in the rolling bearing device of the first embodiment, the rolling bearing device in which the damping member 2 is fixed to the outer ring 6 is disposed between the rotating shaft (not shown) and the housing 19 that is a stationary member. However, in this invention, the rolling bearing device in which the damping member is fixed to the outer ring may be disposed between the shaft that is a stationary member and the housing (sleeve) that is a rotating member.

  Further, in the rolling bearing device of the first embodiment, the rolling bearing device has a structure in which movement in the axial direction is not limited by the housing 19 and the rotating shaft, but in the present invention, in at least one of the housing and the shaft, At least one of the axial directions of the rolling bearing device is provided with a projecting portion extending in the radial direction, and an end surface of the rolling bearing device is brought into contact with the projecting portion so that at least one side in the axial direction of the rolling bearing device is provided. You may make it restrict | limit a movement.

  Moreover, in the rolling bearing device of the first embodiment, as shown in FIG. 1, the outer peripheral surface 20 of the outer ring 6 in one part of the damping member 2 is assembled with the damping member 2 assembled to the outer ring 6. An axial end surface positioned radially outward and an axial end surface positioned radially outward of the outer peripheral surface 20 of the outer ring 6 in the other portion of the damping member 2 are: It is in a contact state. However, in the present invention, as shown in FIG. 2, in the state where the damping member 52 is assembled to the outer ring 6, the outer circumferential surface 20 of the outer ring 6 is radially outward in one portion 54 of the damping member 52. The axial end surface 57 that is positioned and the axial end surface 58 that is located radially outward of the outer peripheral surface 20 of the outer ring 6 in the other portion 56 of the damping member 52 are axially It may be in a state of facing each other without contacting in the axial direction with a gap. In this case, as shown in FIG. 2, it goes without saying that each of one portion 54 of the damping member 52 and the other portion 56 of the damping member 52 has annular grooves 60 and 61 having a rectangular cross section.

  In the rolling bearing device of the first embodiment, the damping member 2 has a larger linear expansion coefficient than that of the outer ring 6. In the present invention, the twin-type damping alloy constituting the damping member is used. Regardless of whether the material has the same linear expansion coefficient as the outer ring or a smaller linear expansion coefficient than the outer ring, the damping member is attached to the outer ring in all temperature ranges. Can be fitted and fixed without problems.

  Specifically, when the damping member has the same linear expansion coefficient as the outer ring, at normal temperature, between the inner circumferential surface of the damping member and the outer circumferential surface of the outer ring, and the outer circumferential surface of the damping member Just by fitting at least one of the inner ring surface of the outer ring and the outer ring raceway surface with a tightening margin that does not deform the outer ring, the outer ring ring and the outer ring Since both the fitting with the surface and the fitting between the outer circumferential surface of the damping member and the inner circumferential surface of the outer ring are hardly changed due to temperature fluctuations, in this case, the damping member is attached to the outer ring in any temperature range. Can be securely fitted and fixed.

  In addition, when the linear expansion coefficient of the damping member is smaller than the linear expansion coefficient of the outer ring, at normal temperature, between the inner circumferential surface of the damping member and the outer circumferential surface of the outer ring, and between the inner circumferential surface of the outer ring and the vibration damping If it is fitted between the outer peripheral surface of the member with a tightening margin that does not deform the raceway surface of the outer ring, the inner peripheral surface of the outer ring and the damping member are in a region where the temperature is higher than normal temperature. There is a case where the fitting with the outer peripheral surface of the cylinder becomes loose, but in that region, the fitting between the inner peripheral surface of the damping member and the outer peripheral surface of the outer ring is a fitting with a larger tightening margin than at normal temperature. become. On the other hand, in the region where the temperature is lower than the normal temperature, the fitting between the inner peripheral surface of the vibration damping member and the outer peripheral surface of the outer ring may become loose, but in that region, the inner peripheral surface of the outer ring and the damping member The fitting with the outer peripheral surface is a fitting with a larger tightening margin than at normal temperature. Accordingly, the damping member and the outer ring can be fitted with a tightening margin at any temperature, and creep can be prevented from occurring between the damping member and the outer ring.

(Second Embodiment)
FIG. 3 is an axial sectional view of a rolling bearing device according to a second embodiment of the present invention.

  In the second embodiment, the vibration damping member 202 is made of a ferromagnetic vibration damping alloy material, and the vibration bearing member 2 is made of a twin type vibration damping alloy material. Different from the device.

  This rolling bearing device includes a ball bearing 201 as an example of a rolling bearing and a damping member 202 as a fitting member.

  The ball bearing 201 includes an inner ring 205, an outer ring 206, and a ball 207 as an example of a rolling element. Inner ring 205, outer ring 206 and ball 207 are made of high carbon chromium bearing steel (SUJ2). The inner ring 205 is externally fitted and fixed to a rotating shaft (not shown) of a machine tool or the like on which the rolling bearing device is installed. The balls 207 are held by a retainer (not shown) between the raceway groove as the raceway surface of the inner ring 205 and the raceway groove as the raceway surface of the outer ring 206, with a predetermined interval in the circumferential direction. A plurality are arranged apart.

  The damping member 202 is made of a Fe-Al alloy-based ferromagnetic damping alloy material. From this, the linear expansion coefficient of the damping member 202 is smaller than the linear expansion coefficient of the outer ring 206.

  As shown in FIG. 3, the vibration damping member 202 has an annular groove having a substantially convex cross section. Specifically, the damping member 202 has a rectangular cross-section having an internal space with a rectangular cross section in a half cross section in the axial direction of the outer ring 206 (half area with the central axis of the outer ring 206 as a boundary). Of the two frames extending in the direction, the central portion in the longitudinal direction of the frame portion located radially inward has a shape that is cut off.

  That is, the damping member 202 has an outer surface that abuts on the outer surface portion of the outer ring 206 except for the central portion of the inner peripheral surface of the outer ring 206 including the raceway groove of the outer ring 206. Specifically, the annular groove has a first circumferential surface that abuts on the outer circumferential surface 220 of the outer ring 206, a first end surface that abuts on one end surface in the axial direction of the outer ring 206, and the other axial side surface of the outer ring 206. A second end surface in contact with the end surface, a first second peripheral surface as a second peripheral surface in contact with the end portion 221 in the axial direction on the inner peripheral surface of the outer ring 206, and an inner periphery of the outer ring 206 And a second second peripheral surface as a second peripheral surface in contact with the end 222 on the other side of the surface in the axial direction.

  In other words, the damping member 202 includes the inner peripheral surface 210 corresponding to the first peripheral surface, the axial end surface 211 that abuts the end surface on one side of the outer ring 206 in the axial direction, and the other axial direction of the outer ring 206. An end face 212 in the axial direction that comes into contact with the end face on the left side, an outer peripheral face 213 corresponding to the first second peripheral face, and an outer peripheral face 214 corresponding to the second second peripheral face.

  The outermost outer peripheral surface 218 in the radial direction of the vibration damping member 202 is tightly fitted to the inner peripheral surface 240 of a housing 219 such as a machine tool in which the rolling bearing device is installed. Further, the inner peripheral surface 210 of the damping member 2 is tightly fitted to the outer peripheral surface 220 of the outer ring 206 at normal temperature, while the outer peripheral surface of the damping member 202 is located radially inward of the outer ring 206. 213 and 214 are tightly fitted to the end portions 221 and 222 of the inner peripheral surface of the outer ring 206. In other words, at the normal temperature, the inner peripheral surface 210 of the damping member 202 is fitted and fixed to the outer peripheral surface 220 of the outer ring 206, while the outer peripheral surfaces 213 and 214 of the vibration damping member 202 are It is fitted and fixed to the end portions 221 and 222 of the peripheral surface.

  The vibration damping member 202 has a structure that can be divided into two parts with a vertical bisector of the central axis of the outer ring 206 as a boundary. When the damping member 202 is assembled to the outer ring 206, after one portion of the damping member 202 is assembled to one side of the outer ring 206 in the axial direction, the damping member is arranged to the other side of the outer ring 206 in the axial direction. The other part of 202 is assembled, and the damping member 202 is assembled to the outer ring 206.

  According to the rolling bearing device of the second embodiment, the damping member 202 has an inner peripheral surface 210 that contacts the outer peripheral surface 220 of the outer ring 206 and an outer periphery that contacts the end portions 221 and 222 of the inner peripheral surface of the outer ring 206. Surfaces 213 and 214, between the inner peripheral surface 210 of the damping member 202 and the outer peripheral surface 220 of the outer ring 206, and between the end portions 221 and 222 of the inner peripheral surface of the outer ring 206 and the outer periphery of the damping member 2. Since the raceway groove of the outer ring 206 is fitted between the surfaces 213 and 214 at a room temperature so that the raceway groove of the outer ring 206 is not deformed, deformation of the raceway groove of the outer ring 206 is suppressed at any temperature. And between the inner circumferential surface 210 of the damping member 202 and the outer circumferential surface 220 of the outer ring 206, and the end portions 221 and 222 of the inner circumferential surface of the outer ring 206 and the outer circumferential surfaces 213 and 214 of the damping member 202. At least one of the It can be fitted in a state of having a fit allowance.

  Specifically, in the second embodiment, since the linear expansion coefficient of the damping member 202 is smaller than the linear expansion coefficient of the outer ring 206, the inner circumferential surface 210 of the damping member 202 and the outer circumferential surface 220 of the outer ring 206 are And between the end portions 221 and 222 of the inner peripheral surface of the outer ring 206 and the outer peripheral surfaces 213 and 214 of the damping member 202 with a tightening margin that does not deform the raceway groove of the outer ring 206. When fitted, the outer peripheral surfaces 213 and 214 of the damping member 202 and the inner peripheral surface of the outer ring 206 due to the difference in linear expansion coefficient between the damping member 202 and the outer ring 206 in a region where the temperature is higher than normal temperature. The fitting between the end portions 221 and 222 may be loose, but in that region, the fitting between the inner peripheral surface 210 of the damping member 202 and the outer peripheral surface 220 of the outer ring 206 is tighter than at normal temperature. The fitting is in a state where the allowance is large.

  On the other hand, in the region where the temperature is lower than the normal temperature, the fitting between the inner peripheral surface 210 of the damping member 202 and the outer peripheral surface 220 of the outer ring 206 is loose due to the difference in the linear expansion coefficient between the damping member 202 and the outer ring 206. In that region, the engagement between the end portions 213 and 214 of the outer peripheral surface of the damping member 202 and the inner peripheral surfaces 221 and 222 of the outer ring 206 is in a state where the tightening allowance is larger than that at normal temperature. It becomes a fitting.

  Therefore, the damping member 202 and the outer ring 206 can be fitted with a tightening margin at any temperature, and the fitting between the damping member 202 and the outer ring 206 is weakened to a predetermined level or less. Therefore, creep can be prevented from occurring between the damping member 202 and the outer ring 206.

  In other words, in the second embodiment, the end portions 213 and 214 of the outer peripheral surface of the vibration damping member 202 and the inner peripheral surfaces 221 and 222 of the outer ring 206 are tightened in a region at room temperature or below a first predetermined temperature that is higher than normal temperature. The inner peripheral surface 210 of the vibration damping member 202 and the outer peripheral surface 220 of the outer ring 206 are fitted in a state having a margin and at a normal temperature or a second predetermined temperature that is equal to or lower than normal temperature (a temperature equal to or lower than the first predetermined temperature) Are fitted with a tightening allowance. From this, in 2nd Embodiment, the damping member 202 can be reliably fixed to the outer ring | wheel 206 in all the temperature ranges.

  Further, according to the rolling bearing device of the second embodiment, the outer peripheral surfaces 213 and 214 of the vibration damping member 202 fitted to the inner peripheral surface of the outer ring 206 are present on both sides of the ball 207 in the axial direction. The force for locking the damping member 202 to the outer ring 206 can be increased.

  Further, according to the rolling bearing device of the second embodiment, the damping member 202 is disposed so as to surround the outer surface portion of the outer ring 206 excluding the central portion of the inner peripheral surface of the outer ring 206 including the raceway groove of the outer ring 206. In addition, since the outer peripheral surfaces 213 and 214 of the vibration damping member 202 exist on both sides in the axial direction of the ball 209, the mass of the vibration damping member 202 can be significantly increased. Therefore, the damping performance can be greatly improved by the mass effect, that is, the effect that the damping performance of the damping member increases as the mass of the damping member increases.

  Further, according to the rolling bearing device of the second embodiment, the damping member 202 is made of a ferromagnetic damping alloy material. In the present invention, since the damping member 202 has a configuration in which both the outer peripheral surface 220 and the inner peripheral surface 222 of the outer ring 206 are held, the linear expansion coefficient is smaller than that of the steel material. It is possible to prevent the outer ring 206 and the damping member 202 from fitting excessively, and to suppress the damping performance from being lowered. When the ferromagnetic damping material increases in fitting and the compressive strain increases, the loss factor decreases and the damping performance decreases. If the loss coefficient of the damping member and the loss coefficient of the outer ring fitted with the damping member are the same, the damping performance of the damping member becomes the same as the damping performance of the outer ring fitted with the damping member.

  In the rolling bearing device of the second embodiment, the inner and outer rings 205 and 206 and the ball 207 are made of high carbon chrome bearing steel. In the present invention, at least one of the inner ring, the outer ring and the rolling element is used. May consist of steel materials other than high carbon chromium bearing steel such as carburized hardened steel (SAE5120). In the rolling bearing device of the second embodiment, the damping member 202 is made of an Fe—Al alloy-based ferromagnetic damping alloy material. In this invention, the damping member is Fe—Al. It may be made of a ferromagnetic damping alloy material other than an alloy. Specifically, the vibration damping member may be made of an Fe—Cr alloy material (for example, Silantaloy (registered trademark), Gentalloy (registered trademark), or the like), a Co—Ni alloy, or the like. Examples of the ferromagnetic vibration damping alloy material include the ferromagnetic vibration damping alloy materials described in JP-A-52-73118, JP-A-04-99148, and JP-A-06-220583. Etc.

  Further, in the rolling bearing device of the second embodiment, the outer peripheral surfaces 213 and 214 of the damping member 202 contacting the inner peripheral surface of the outer ring 206 are present on both sides of the ball 207 in the axial direction. Then, the outer peripheral surface of the damping member that contacts the inner peripheral surface of the outer ring may exist only on one side in the axial direction of the rolling element.

  In the rolling bearing device of the second embodiment, the non-separated vibration damping member 202 is used. However, in the present invention, the vibration damping member is a first vibration damping member having an inner peripheral surface that abuts on the outer peripheral surface of the outer ring. While having a member and the outer peripheral surface contact | abutted to the inner peripheral surface of an outer ring | wheel, you may comprise by the 2nd damping member isolate | separated from the 1st damping member.

  Further, the rolling bearing device of the second embodiment has a configuration including the ball bearing 201. However, the rolling bearing device of the present invention is a rolling bearing other than a ball bearing such as a roller bearing (cylindrical roller bearing, conical roller bearing). The structure including a bearing may be sufficient.

  Further, in the rolling bearing device of the second embodiment, as shown in FIG. 3, the opening between the inner ring 205 and the outer ring 206 is not sealed on both sides in the axial direction of the ball bearing 201. . However, in the present invention, the outer peripheral surface of the damping member that contacts the inner peripheral surface of the outer ring exists only on one side in the axial direction of the rolling element, and the opening on the other side in the axial direction between the inner and outer rings is provided. It may be sealed with a seal member (shield plate) made of a metal plate or a seal member having a metal cored bar and a rubber seal lip. Further, when the opening on the other side is sealed with a sealing member, the sealing member may have a structure that slides in contact with the rotating wheel, or a labyrinth structure that is non-contacting with the rotating wheel. May be.

  In the rolling bearing device of the second embodiment, a cage that holds the ball 207 is used. However, when the rolling bearing device of the present invention includes a ball bearing, a crown cage is used as the cage. You may use, and you may use the holder | retainer of the structure formed by connecting between two annular parts with a some pillar part. In addition, the rolling bearing device of the present invention may have a structure without a cage, and the rolling bearing device of the present invention may have a so-called all-ball bearing.

  In the rolling bearing device according to the second embodiment, the rolling bearing device in which the damping member 202 is fixed to the outer ring 206 is disposed between the rotating shaft (not shown) and the housing 219 that is a stationary member. However, in this invention, the rolling bearing device in which the damping member is fixed to the outer ring may be disposed between the shaft that is a stationary member and the housing (sleeve) that is a rotating member.

  Further, in the rolling bearing device of the second embodiment, the rolling bearing device has a structure in which the movement in the axial direction is not limited by the housing 219 and the rotating shaft, but in the present invention, in at least one of the housing and the shaft, At least one of the axial directions of the rolling bearing device is provided with a projecting portion extending in the radial direction, and an end surface of the rolling bearing device is brought into contact with the projecting portion so that at least one side in the axial direction of the rolling bearing device is provided. You may make it restrict | limit a movement.

  Further, in the rolling bearing device of the second embodiment, as shown in FIG. 3, the outer peripheral surface 220 of the outer ring 206 in one part of the damping member 202 is assembled with the damping member 202 assembled to the outer ring 206. An axial end surface positioned radially outward and an axial end surface positioned radially outward of the outer peripheral surface 220 of the outer ring 206 in the other portion of the damping member 202 are: It is in a contact state. However, in the present invention, as shown in FIG. 4, in the state where the damping member 252 is assembled to the outer ring 206, the outer side surface 220 of the outer ring 206 is radially outward of one portion 254 of the damping member 252. The axial end surface 257 that is positioned and the axial end surface 258 that is positioned radially outward of the outer peripheral surface 220 of the outer ring 206 in the other portion 256 of the damping member 252 are axially It may be in a state of facing each other without contacting in the axial direction with a gap. In this case, as shown in FIG. 4, it goes without saying that each of the one part 254 of the damping member 252 and the other part 256 of the damping member 252 has annular grooves 260 and 261 having a rectangular cross section.

  In the rolling bearing device of the second embodiment, the damping member 202 has a smaller linear expansion coefficient than the outer ring 206. In the present invention, however, the ferromagnetic damping alloy constituting the damping member is used. Regardless of whether the material has the same linear expansion coefficient as the outer ring or a larger linear expansion coefficient than the outer ring, the damping member is used as the outer ring in all temperature ranges. Can be fitted and fixed without problems.

(Third embodiment)
FIG. 5 is an axial sectional view of a rolling bearing device according to a third embodiment of the present invention.

  This rolling bearing device includes a ball bearing 101 as an example of a rolling bearing and a damping member 102 as a fitting member.

  The ball bearing 1 includes an inner ring 105, an outer ring 106, and a ball 107 as an example of a rolling element. The inner ring 105, the outer ring 106 and the ball 107 are made of high carbon chrome bearing steel (SUJ2). An outer peripheral surface 140 of the outer ring 106 is fitted and fixed to an inner peripheral surface 141 of a housing 119 such as a machine tool in which the rolling bearing device is installed. The balls 107 have a predetermined interval in the circumferential direction while being held by a cage (not shown) between the raceway groove as the raceway surface of the inner ring 105 and the raceway groove as the raceway surface of the outer ring 106. A plurality are arranged apart.

  The damping member 102 is made of a twin type damping alloy material. The linear expansion coefficient of the damping member 102 is larger than the linear expansion coefficient of the inner ring 105. Here, examples of the twin type vibration damping alloy material include a Mn—Cu alloy, a Cu—Al—Ni alloy, and a Ti—Ni alloy.

  As shown in FIG. 5, the damping member 102 has an annular groove having a substantially convex cross section. Specifically, the damping member 102 has a rectangular cross-section having an internal space with a rectangular cross section in a half cross section in the axial direction of the inner ring 105 (a half region with the central axis of the inner ring 105 as a boundary). Of the two frames extending in the direction, the central portion in the longitudinal direction of the frame portion located radially outward has a shape that is cut off.

  That is, the damping member 102 has an outer surface that abuts on the outer surface portion of the inner ring 105 excluding the central portion of the outer peripheral surface of the inner ring 105 including the raceway groove of the inner ring 105. Specifically, the annular groove includes a first peripheral surface that contacts the inner peripheral surface 120 of the inner ring 105, a first end surface that contacts one end surface of the inner ring 105 in the axial direction, and the other side in the axial direction of the inner ring 105. A second end surface in contact with the end surface of the inner ring 105, a first second peripheral surface as a second peripheral surface in contact with the end portion 121 on the one axial side of the outer peripheral surface of the inner ring 105, and an outer peripheral surface of the inner ring 105 And a second second peripheral surface serving as a second peripheral surface in contact with the other end 122 in the axial direction.

  In other words, the damping member 102 includes an inner peripheral surface 110 corresponding to the first peripheral surface, an axial end surface 111 that abuts an end surface on one side of the inner ring 105 in the axial direction, and the other axial direction of the inner ring 105. An end face 112 in the axial direction contacting the end face on the side, an inner peripheral face 113 corresponding to the first second peripheral face, and an inner peripheral face 114 corresponding to the second second peripheral face. Yes.

  A radially innermost inner peripheral surface 118 of the vibration damping member 102 is tightly fitted to a rotary shaft 108 of a machine tool or the like on which the rolling bearing device is installed. The outer circumferential surface 110 of the damping member 102 is tightly fitted to the inner circumferential surface 120 of the inner ring 105 at room temperature, while the inner circumferential surface of the damping member 102 is located radially outward of the inner ring 105. The surfaces 113 and 114 are tightly fitted to end portions 121 and 122 in the axial direction on the outer peripheral surface of the inner ring 105. In other words, at the normal temperature, the outer peripheral surface 110 of the damping member 102 is fitted and fixed to the inner peripheral surface 120 of the inner ring 105, while the inner peripheral surfaces 113 and 114 of the damping member 102 are fixed to the inner ring 105. It is fitted and fixed to the end portions 121 and 122 of the outer peripheral surface.

  The damping member 102 has a structure that can be divided into two parts with a vertical bisector of the central axis of the inner ring 105 as a boundary. When the damping member 102 is assembled to the inner ring 105, after one portion of the damping member 102 is assembled to one side of the inner ring 105 in the axial direction, the damping member is arranged to the other side of the inner ring 105 in the axial direction. The other part of 102 is assembled, and the damping member 102 is assembled to the inner ring 105.

  According to the rolling bearing device of the third embodiment, the damping member 102 has the outer peripheral surface 110 that contacts the inner peripheral surface 120 of the inner ring 105 and the inner periphery that contacts the end portions 121 and 122 of the outer peripheral surface of the inner ring 105. Surfaces 113, 114, between the outer peripheral surface 110 of the damping member 102 and the inner peripheral surface 120 of the inner ring 105, and between the end portions 121, 122 of the outer peripheral surface of the inner ring 105 and the inner periphery of the damping member 102. The surfaces 113 and 114 are fitted at a normal temperature with a tightening margin that does not deform the raceway groove of the inner ring 105, so that the outer peripheral surface 110 of the damping member 102 can be connected to the surfaces 113 and 114 at any temperature. There is a fastening allowance between the inner peripheral surface 120 of the inner ring 105 and at least one of the end portions 121, 122 of the outer peripheral surface of the inner ring 105 and the inner peripheral surfaces 113, 114 of the damping member 102. Can be fitted in That.

  Specifically, in the third embodiment, since the linear expansion coefficient of the damping member 102 is larger than the linear expansion coefficient of the inner ring 105, the outer circumferential surface 110 of the damping member 102 and the inner circumferential surface 120 of the inner ring 105 at room temperature. Between the end portions 121 and 122 of the outer peripheral surface of the inner ring 105 and the inner peripheral surfaces 113 and 114 of the damping member 102 with a tightening margin that does not deform the raceway groove of the inner ring 105. When fitted, the inner peripheral surfaces 113 and 114 of the vibration damping member 102 and the outer peripheral surface of the inner ring 105 due to the difference in coefficient of linear expansion between the vibration damping member 102 and the inner ring 105 in a region where the temperature is higher than normal temperature. In this region, the fitting between the outer peripheral surface 110 of the damping member 102 and the inner peripheral surface 120 of the inner ring 105 is tightened more than at normal temperature. The fitting is in a state with large allowance.

  On the other hand, in the region where the temperature is lower than the normal temperature, the fitting between the outer peripheral surface 110 of the damping member 102 and the inner peripheral surface 120 of the inner ring 105 is loose due to the difference in the linear expansion coefficient between the damping member 102 and the inner ring 105. In that region, the engagement between the inner peripheral surfaces 113 and 114 of the damping member 102 and the end portions 121 and 122 of the outer peripheral surface of the inner ring 105 is in a state in which the tightening allowance is larger than that at normal temperature. It becomes a fitting.

  Therefore, the damping member 102 and the inner ring 105 can be fitted with a tightening margin at any temperature, and the fitting between the damping member 102 and the inner ring 105 is weakened to a predetermined level or less. It is possible to prevent creep from occurring.

  In other words, in the third embodiment, the inner peripheral surfaces 113 and 114 of the vibration damping member 102 and the end portions 121 and 122 of the outer peripheral surface of the inner ring 105 in the region below the first predetermined temperature that is normal temperature or higher than normal temperature are: The inner ring surface 120 of the inner ring 105 and the outer circumferential surface of the damping member 102 are fitted with a tightening allowance at a normal temperature or a second predetermined temperature that is equal to or lower than normal temperature (a temperature equal to or lower than the first predetermined temperature). 110 is fitted with a tightening allowance. For this reason, in the third embodiment, the damping member 102 can be reliably fixed to the inner ring 105 in all temperature ranges.

  Further, according to the rolling bearing device of the third embodiment, the inner peripheral surfaces 113 and 114 of the damping member 102 fitted to the outer peripheral surface of the inner ring 105 exist on both sides in the axial direction of the ball 107. The force for locking the damping member 102 to the inner ring 105 can be increased.

  Further, according to the rolling bearing device of the third embodiment, the damping member 102 is disposed so as to surround the outer surface portion of the inner ring 105 excluding the central portion of the outer peripheral surface of the inner ring 105 including the raceway groove of the inner ring 105. Since the inner peripheral surfaces 113 and 114 of the damping member 102 are present on both sides of the ball 109 in the axial direction, the mass of the damping member 102 can be significantly increased. Therefore, the damping performance can be remarkably improved by the mass effect, that is, the effect that the damping performance of the damping member increases as the mass of the damping member increases.

  In the rolling bearing device of the third embodiment, the inner and outer rings 105 and 106 and the ball 107 are made of high carbon chrome bearing steel. However, in the present invention, at least one of the inner ring, the outer ring and the rolling element is used. May consist of steel materials other than high carbon chromium bearing steel such as carburized hardened steel (SAE5120). In the rolling bearing device of the third embodiment, the vibration damping member 102 is made of a twin-type vibration damping alloy material. However, in the present invention, the vibration damping member has vibration damping rubber or vibration damping properties. It may be made of a resin material. The damping member may be made of any material as long as the material has damping properties.

  Further, in the rolling bearing device of the third embodiment, the inner peripheral surfaces 113 and 114 of the damping member 102 that abuts on the outer peripheral surface of the inner ring 105 are present on both sides in the axial direction of the ball 107. Then, the inner peripheral surface of the damping member that contacts the outer peripheral surface of the inner ring may exist only on one side in the axial direction of the rolling element.

  Further, in the rolling bearing device of the third embodiment, the non-separated vibration damping member 102 is used. However, in the present invention, the vibration damping member is a first vibration damping member having an outer peripheral surface that comes into contact with the inner peripheral surface of the inner ring. You may comprise a member and the 2nd damping member isolate | separated from the 1st damping member while having an inner peripheral surface contact | abutted to the outer peripheral surface of an inner ring | wheel.

  The rolling bearing device of the third embodiment has a configuration including the ball bearing 101. However, the rolling bearing device of the present invention is a rolling bearing other than a ball bearing, such as a roller bearing (cylindrical roller bearing, conical roller bearing). The structure including a bearing may be sufficient.

  Further, in the rolling bearing device of the third embodiment, as shown in FIG. 5, the openings between the inner ring 105 and the outer ring 106 are not sealed on both axial sides of the ball bearing 101. In this invention, the inner peripheral surface of the damping member that contacts the outer peripheral surface of the inner ring exists only on one side in the axial direction of the rolling element, and the opening on the other side in the axial direction between the inner and outer rings is It may be sealed with a seal member (shield plate) made of a metal plate or a seal member having a metal core part and a rubber seal lip. Further, when the opening on the other side is sealed with a sealing member, the sealing member may have a structure that slides in contact with the rotating wheel, or a labyrinth structure that is non-contacting with the rotating wheel. May be.

  Further, in the rolling bearing device of the third embodiment, the cage that holds the ball 107 is used. However, when the rolling bearing device of the present invention includes a ball bearing, a crown-shaped cage is used as the cage. You may use, and you may use the holder | retainer of the structure formed by connecting between two annular parts with a some pillar part. In addition, the rolling bearing device of the present invention may have a structure without a cage, and the rolling bearing device of the present invention may have a so-called all-ball bearing.

  In the rolling bearing device of the third embodiment, the rolling bearing device in which the damping member 102 is fixed to the inner ring 105 is disposed between the rotary shaft 108 and the housing 119 that is a stationary member. In the invention, the rolling bearing device in which the damping member is fixed to the inner ring may be disposed between the shaft that is a stationary member and the housing (sleeve) that is a rotating member.

  In the rolling bearing device according to the third embodiment, the rolling bearing device has a structure in which the movement in the axial direction is not limited by the housing 119 and the rotating shaft 108. In the present invention, at least one of the housing and the shaft is used. At least one side of the rolling bearing device in the axial direction is provided by providing a projecting portion extending in the radial direction on at least one of the axial directions of the rolling bearing device and bringing the end face of the rolling bearing device into contact with the projecting portion. The movement may be limited.

  In the rolling bearing device of the third embodiment, as shown in FIG. 5, the inner peripheral surface 120 of the inner ring 105 in one part of the damping member 102 in a state where the damping member 102 is assembled to the inner ring 105. An axial end surface positioned inward in the radial direction of the inner ring 105 and an axial end surface positioned inward in the radial direction of the inner peripheral surface 120 of the inner ring 105 in the other portion of the damping member 102. However, it is in the state which contact | abutted. However, in the present invention, as shown in FIG. 6, in the state where the damping member 152 is assembled to the inner ring 105, the radially inner side of the inner peripheral surface 120 of the inner ring 105 in one portion 154 of the damping member 152. The axial end surface 157 located at the center and the axial end surface 158 located radially inward of the inner peripheral surface 120 of the inner ring 105 in the other portion 156 of the damping member 152 are It may be in a state of being opposed to each other without contacting in the axial direction with a gap in the direction. In this case, as shown in FIG. 6, it goes without saying that each of the one part 154 of the vibration damping member 152 and the other part 156 of the vibration damping member 152 has annular grooves 160 and 161 having a rectangular cross section.

  In the rolling bearing device according to the third embodiment, the damping member 102 has a larger linear expansion coefficient than the inner ring 105. In the present invention, the twin-type damping alloy constituting the damping member is used. Regardless of whether the material has the same linear expansion coefficient as the inner ring or a smaller linear expansion coefficient than the inner ring, the damping member is used as the inner ring in all temperature ranges. Can be fitted and fixed without problems.

  Specifically, when the damping member has the same linear expansion coefficient as the inner ring, at normal temperature, between the inner circumferential surface of the damping member and the outer circumferential surface of the inner ring, and the outer circumferential surface of the damping member By simply fitting at least one of the inner ring surface and the inner ring surface with a tightening margin that does not deform the inner ring raceway surface, the inner ring surface of the damping member and the outer ring surface Since both the fitting with the surface and the fitting between the outer circumferential surface of the damping member and the inner circumferential surface of the inner ring hardly change due to temperature fluctuations, in this case, the damping member can be attached to the inner ring in any temperature range. Can be securely fitted and fixed.

  Further, when the linear expansion coefficient of the damping member is smaller than the linear expansion coefficient of the inner ring, at normal temperature, between the inner circumferential surface of the damping member and the outer circumferential surface of the inner ring, and between the outer circumferential surface of the damping member and the inner ring. Between the inner peripheral surface of the inner ring and the inner ring raceway surface with a tightening allowance that does not deform, the outer peripheral surface of the damping member and the inner ring The fitting with the inner peripheral surface may be loose, but in that region, the fitting between the inner peripheral surface of the damping member and the outer peripheral surface of the inner ring had a larger allowance than at normal temperature. It becomes a state fitting. On the other hand, in the region where the temperature is lower than normal temperature, the fitting between the inner peripheral surface of the vibration damping member and the outer peripheral surface of the inner ring may become loose, but in that region, the outer peripheral surface of the vibration damping member and the inner ring The fitting with the inner peripheral surface of this is a fitting with a larger tightening margin than at normal temperature. Therefore, at any temperature, the damping member and the inner ring can be fitted with a tightening margin, and creep can be prevented from occurring between the damping member and the inner ring. is there.

(Fourth embodiment)
FIG. 7 is an axial sectional view of a rolling bearing device according to a fourth embodiment of the present invention.

  In the fourth embodiment, the vibration damping member 302 is made of a ferromagnetic vibration damping alloy material, and the vibration bearing member 102 is made of a twin type vibration damping alloy material. Different from the device.

  This rolling bearing device includes a ball bearing 301 as an example of a rolling bearing and a damping member 302 as a fitting member.

  The ball bearing 301 includes an inner ring 305, an outer ring 306, and a ball 307 as an example of a rolling element. The inner ring 305, the outer ring 306 and the ball 307 are made of high carbon chrome bearing steel (SUJ2). An outer peripheral surface 340 of the outer ring 306 is fitted and fixed to an inner peripheral surface 341 of a housing 319 such as a machine tool in which the rolling bearing device is installed. The balls 307 are held by a cage (not shown) between the raceway groove as the raceway surface of the inner ring 305 and the raceway groove as the raceway surface of the outer ring 306 at a predetermined interval in the circumferential direction. A plurality are arranged apart.

  The damping member 302 is made of an Fe—Al alloy-based ferromagnetic damping alloy material. From this, the linear expansion coefficient of the damping member 302 is smaller than the linear expansion coefficient of the inner ring 305.

  As shown in FIG. 7, the damping member 302 has an annular groove having a substantially convex cross section. Specifically, the vibration damping member 302 has a rectangular cross-section having an internal space with a rectangular cross section in a half cross section in the axial direction of the inner ring 305 (a half region with the central axis of the inner ring 305 as a boundary). Of the two frames extending in the direction, the central portion in the longitudinal direction of the frame portion located radially outward has a shape that is cut off.

  That is, the damping member 302 has an outer surface that abuts on an outer surface portion of the inner ring 305 excluding a central portion of the outer peripheral surface of the inner ring 305 including the raceway groove of the inner ring 305. Specifically, the annular groove includes a first peripheral surface that contacts the inner peripheral surface 320 of the inner ring 305, a first end surface that contacts one end surface of the inner ring 305 in the axial direction, and the other side of the inner ring 305 in the axial direction. A second end surface that contacts the end surface of the inner ring 305, a first second peripheral surface serving as a second peripheral surface that contacts the end portion 321 on the one side in the axial direction of the outer peripheral surface of the inner ring 305, and the outer peripheral surface of the inner ring 305 And a second second peripheral surface as a second peripheral surface in contact with the other end 322 in the axial direction.

  In other words, the damping member 302 includes an inner peripheral surface 310 corresponding to the first peripheral surface, an axial end surface 311 that abuts an end surface on one side of the inner ring 305 in the axial direction, and the other axial direction of the inner ring 305. An end face 312 in the axial direction that abuts the end face on the side, an inner peripheral face 313 corresponding to the first second peripheral face, and an inner peripheral face 314 corresponding to the second second peripheral face. Yes.

  A radially innermost inner peripheral surface 318 of the vibration damping member 302 is tightly fitted to a rotary shaft 308 of a machine tool or the like on which the rolling bearing device is installed. The outer peripheral surface 310 of the damping member 302 is tightly fitted to the inner peripheral surface 320 of the inner ring 305 at room temperature, while the inner periphery of the damping member 302 is located radially outward of the inner ring 305. The surfaces 313 and 314 are tightly fitted to axial ends 321 and 322 on the outer peripheral surface of the inner ring 305. In other words, at the normal temperature, the outer peripheral surface 310 of the damping member 302 is fitted and fixed to the inner peripheral surface 320 of the inner ring 305, while the inner peripheral surfaces 313 and 314 of the damping member 302 are fixed to the inner ring 305. It is fitted and fixed to the end portions 321 and 322 of the outer peripheral surface.

  The vibration damping member 302 has a structure that can be divided into two parts with a vertical bisector of the central axis of the inner ring 305 as a boundary. When assembling the damping member 302 to the inner ring 305, after assembling one part of the damping member 302 on one side of the inner ring 305 in the axial direction, the damping member on the other side of the inner ring 305 in the axial direction. The other part of 302 is assembled, and the damping member 302 is assembled to the inner ring 305.

  According to the rolling bearing device of the fourth embodiment, the damping member 302 has the outer peripheral surface 310 that contacts the inner peripheral surface 320 of the inner ring 305 and the inner periphery that contacts the end portions 321 and 322 of the outer peripheral surface of the inner ring 305. The outer peripheral surface 310 of the damping member 302 and the inner peripheral surface 320 of the inner ring 305, and the end portions 321 and 322 of the outer peripheral surface of the inner ring 305 and the inner periphery of the damping member 302. The surfaces 313 and 314 are fitted to each other with a tightening allowance that does not deform the raceway groove of the inner ring 305 at room temperature, so that the outer peripheral surface 310 of the damping member 302 can be There is a fastening allowance between the inner peripheral surface 320 of the inner ring 305 and at least one of the end portions 321 and 322 of the outer peripheral surface of the inner ring 305 and the inner peripheral surfaces 313 and 314 of the damping member 302. Can be fitted in That.

  Specifically, in the fourth embodiment, since the linear expansion coefficient of the damping member 302 is smaller than the linear expansion coefficient of the inner ring 305, the outer circumferential surface 310 of the damping member 302 and the inner circumferential surface 320 of the inner ring 305 are And between the end portions 321 and 322 of the outer peripheral surface of the inner ring 305 and the inner peripheral surfaces 313 and 314 of the damping member 302 with a tightening margin that does not deform the raceway groove of the inner ring 305. When fitted, the outer peripheral surface 310 of the damping member 302 and the inner peripheral surface 320 of the inner ring 305 are caused by the difference in linear expansion coefficient between the damping member 302 and the inner ring 305 in a region where the temperature is higher than normal temperature. In this region, the fitting between the inner peripheral surfaces 313 and 314 of the damping member 302 and the end portions 321 and 322 of the outer peripheral surface of the inner ring 305 is tightened more than at normal temperature. The fitting is in a state where the allowance is large.

  On the other hand, in the region where the temperature is lower than normal temperature, due to the difference in coefficient of linear expansion between the damping member 302 and the inner ring 305, the inner peripheral surfaces 313, 314 of the damping member 302 and the end portions 321 of the outer peripheral surface of the inner ring 305 are provided. The fitting with 322 may be loose, but in that region, the fitting between the outer peripheral surface 310 of the damping member 302 and the inner peripheral surface 320 of the inner ring 305 is in a state where the tightening allowance is larger than that at normal temperature. It becomes a mating.

  Therefore, the damping member 302 and the inner ring 305 can be fitted with a tightening margin at any temperature, and the fitting between the damping member 302 and the inner ring 305 is weakened to a predetermined level or less. It is possible to prevent creep from occurring.

  In other words, in the fourth embodiment, the outer peripheral surface 310 of the vibration damping member 302 and the inner peripheral surface 320 of the inner ring 305 are fitted with a tightening margin in a region of room temperature or a first predetermined temperature that is equal to or higher than room temperature. The inner peripheral surfaces 313 and 314 of the damping member 302 and the end portions 321 and 322 of the outer peripheral surface of the inner ring 305 at a normal temperature or a second predetermined temperature that is equal to or lower than the normal temperature (a temperature equal to or lower than the first predetermined temperature) Are fitted with a tightening allowance. From this, in 4th Embodiment, the damping member 302 can be reliably fixed to the inner ring | wheel 305 in all the temperature ranges.

  Further, according to the rolling bearing device of the fourth embodiment, the inner peripheral surfaces 313 and 314 of the damping member 302 fitted to the outer peripheral surface of the inner ring 305 are present on both sides of the ball 307 in the axial direction. The force for locking the damping member 302 to the inner ring 305 can be increased.

  Further, according to the rolling bearing device of the fourth embodiment, the damping member 302 is disposed so as to surround the outer surface portion of the inner ring 305 excluding the central portion of the outer peripheral surface of the inner ring 305 including the raceway groove of the inner ring 305. Since the inner peripheral surfaces 313 and 314 of the damping member 302 exist on both sides of the ball 309 in the axial direction, the mass of the damping member 302 can be significantly increased. Therefore, the damping performance can be remarkably improved by the mass effect, that is, the effect that the damping performance of the damping member increases as the mass of the damping member increases.

  Moreover, according to the rolling bearing device of the fourth embodiment, the damping member 302 is made of a ferromagnetic damping alloy material. In the present invention, since the damping member 302 has a configuration in which both the outer peripheral surface 322 and the inner peripheral surface 320 of the inner ring 305 are held, the linear expansion coefficient is smaller than that of the steel material. The fitting between the inner ring 305 and the damping member 202 can be prevented from becoming excessively large, and the damping performance can be prevented from being lowered. When the ferromagnetic damping material increases in fitting and the compressive strain increases, the loss factor decreases and the damping performance decreases. If the loss coefficient of the damping member and the loss coefficient of the inner ring fitted with the damping member are the same, the damping performance of the damping member becomes the same as the damping performance of the inner ring fitted with the damping member.

  In the rolling bearing device of the fourth embodiment, the inner and outer rings 305 and 306 and the ball 307 are made of high carbon chrome bearing steel. In the present invention, at least one of the inner ring, the outer ring and the rolling element is used. May consist of steel materials other than high carbon chromium bearing steel such as carburized hardened steel (SAE5120). In the rolling bearing device of the fourth embodiment, the damping member 302 is made of a Fe-Al alloy-based ferromagnetic damping alloy material. In the present invention, the damping member is Fe-Al. It may be made of a ferromagnetic damping alloy material other than an alloy. Specifically, the vibration damping member may be made of an Fe—Cr alloy material (for example, Silantaloy (registered trademark), Gentalloy (registered trademark), or the like), a Co—Ni alloy, or the like. Examples of the ferromagnetic vibration damping alloy material include the ferromagnetic vibration damping alloy materials described in JP-A-52-73118, JP-A-04-99148, and JP-A-06-220583. Etc.

  Further, in the rolling bearing device of the fourth embodiment, the inner peripheral surfaces 313 and 314 of the damping member 302 that abuts on the outer peripheral surface of the inner ring 305 are present on both sides in the axial direction of the ball 307. Then, the inner peripheral surface of the damping member that contacts the outer peripheral surface of the inner ring may exist only on one side in the axial direction of the rolling element.

  In the rolling bearing device of the fourth embodiment, the non-separated vibration damping member 302 is used. However, in the present invention, the vibration damping member is a first vibration damping member having an outer peripheral surface that abuts against the inner peripheral surface of the inner ring. You may comprise a member and the 2nd damping member isolate | separated from the 1st damping member while having an inner peripheral surface contact | abutted to the outer peripheral surface of an inner ring | wheel.

  Further, the rolling bearing device of the fourth embodiment has a configuration including the ball bearing 301. However, the rolling bearing device of the present invention is a rolling bearing other than a ball bearing such as a roller bearing (cylindrical roller bearing, conical roller bearing). The structure including a bearing may be sufficient.

  Further, in the rolling bearing device of the fourth embodiment, as shown in FIG. 7, the opening between the inner ring 305 and the outer ring 306 is not sealed on both axial sides of the ball bearing 301. In this invention, the inner peripheral surface of the damping member that contacts the outer peripheral surface of the inner ring exists only on one side in the axial direction of the rolling element, and the opening on the other side in the axial direction between the inner and outer rings is It may be sealed with a seal member (shield plate) made of a metal plate or a seal member having a metal core part and a rubber seal lip. Further, when the opening on the other side is sealed with a sealing member, the sealing member may have a structure that slides in contact with the rotating wheel, or a labyrinth structure that is non-contacting with the rotating wheel. May be.

  Further, in the rolling bearing device of the fourth embodiment, the cage that holds the ball 307 is used. However, when the rolling bearing device of the present invention includes a ball bearing, a crown cage is used as the cage. You may use, and you may use the holder | retainer of the structure formed by connecting between two annular parts with a some pillar part. In addition, the rolling bearing device of the present invention may have a structure without a cage, and the rolling bearing device of the present invention may have a so-called all-ball bearing.

  In the rolling bearing device of the fourth embodiment, the rolling bearing device in which the damping member 302 is fixed to the inner ring 305 is disposed between the rotary shaft 308 and the housing 319 that is a stationary member. In the invention, the rolling bearing device in which the damping member is fixed to the inner ring may be disposed between the shaft that is a stationary member and the housing (sleeve) that is a rotating member.

  Further, in the rolling bearing device of the fourth embodiment, the rolling bearing device has a structure in which the movement in the axial direction is not restricted by the housing 319 and the rotating shaft 308. In the present invention, at least one of the housing and the shaft is used. At least one side of the rolling bearing device in the axial direction is provided by providing a projecting portion extending in the radial direction on at least one of the axial directions of the rolling bearing device and bringing the end face of the rolling bearing device into contact with the projecting portion. The movement may be limited.

  Further, in the rolling bearing device of the fourth embodiment, as shown in FIG. 7, the inner peripheral surface 320 of the inner ring 305 in one part of the damping member 302 with the damping member 302 assembled to the inner ring 305. An axial end surface positioned inward in the radial direction of the inner ring 305 and an axial end surface positioned inward in the radial direction of the inner peripheral surface 320 of the inner ring 305 in the other portion of the damping member 302. However, it is in the state which contact | abutted. However, in the present invention, as shown in FIG. 8, in the state where the damping member 352 is assembled to the inner ring 305, the inner side in the radial direction of the inner peripheral surface 320 of the inner ring 305 in the one portion 354 of the damping member 352. An axial end surface 357 located at the inner surface 358 and an axial end surface 358 located radially inward of the inner peripheral surface 320 of the inner ring 305 in the other portion 356 of the damping member 352 are It may be in a state of being opposed to each other without contacting in the axial direction with a gap in the direction. In this case, as shown in FIG. 8, it goes without saying that each of the one portion 354 of the damping member 352 and the other portion 356 of the damping member 352 has annular grooves 360 and 361 having a rectangular cross section.

  In the rolling bearing device of the fourth embodiment, the damping member 302 has a smaller linear expansion coefficient than the inner ring 305. In the present invention, however, the ferromagnetic damping alloy constituting the damping member is used. Regardless of whether the material has the same linear expansion coefficient as the inner ring or a larger linear expansion coefficient than the inner ring, the damping member is used as the inner ring in all temperature ranges. Can be fitted and fixed without problems.

  In the first to fourth embodiments, the fitting member is a vibration damping member. However, in the present invention, at least one of the inner ring and the outer ring is made of a steel member that is not a vibration damping member, or a vibration damping member. A resin member that does not have the property may be fitted, and any member can be fitted to at least one of the inner ring and the outer ring as long as it can be fitted to at least one of the inner ring and the outer ring. May be.

  In addition, the present invention includes a vibration damping member included in the first embodiment, the modification of the first embodiment, the second embodiment, or the modification of the second embodiment, and the third embodiment and the third embodiment. Of course, a non-integral damping member having the damping member of the modified example, the fourth embodiment, or the modified example of the fourth embodiment may be provided.

It is sectional drawing of the axial direction of the rolling bearing apparatus of 1st Embodiment of this invention. It is sectional drawing of the axial direction of the rolling bearing apparatus of the modification of 1st Embodiment of this invention. It is sectional drawing of the axial direction of the rolling bearing apparatus of 2nd Embodiment of this invention. It is sectional drawing of the axial direction of the rolling bearing apparatus of the modification of 2nd Embodiment of this invention. It is sectional drawing of the axial direction of the rolling bearing apparatus of 3rd Embodiment of this invention. It is sectional drawing of the axial direction of the rolling bearing apparatus of the modification of 3rd Embodiment of this invention. It is sectional drawing of the axial direction of the rolling bearing apparatus of 4th Embodiment of this invention. It is sectional drawing of the axial direction of the rolling bearing apparatus of the modification of 4th Embodiment of this invention.

Explanation of symbols

1,101,201,301 Ball bearing 2,52,102,152,202,252,302,352 Damping member 5,105,205,305 Inner ring 6,106,206,306 Outer ring 7,107,207,307 Ball 10,210 Inner circumferential surface of damping member 13,14,213,214 Outer circumferential surface of damping member 20,220 Outer circumferential surface of outer ring 21,22,221,222 End 110 in axial direction on inner circumferential surface of outer ring 110 , 310 Outer circumferential surface of damping member 113, 114, 313, 314 Inner circumferential surface of damping member 120, 320 Inner circumferential surface of inner ring 121, 122, 321, 322 Axial end of outer circumferential surface of inner ring

Claims (8)

A rolling bearing having an inner ring, an outer ring and rolling elements;
A fitting member having an annular groove;
The annular groove has a first peripheral surface capable of contacting the outer peripheral surface of the outer ring and a second peripheral surface capable of contacting the inner peripheral surface of the outer ring,
Below the first predetermined temperature, the inner peripheral surface of the outer ring is fitted with a tight margin on the second peripheral surface of the fitting member opposed to the inner peripheral surface in the radial direction, The outer peripheral surface of the outer ring has a tightening margin on the first peripheral surface of the fitting member that is radially opposed to the outer peripheral surface at a second predetermined temperature that is lower than the first predetermined temperature by a predetermined temperature. The rolling bearing device is characterized by being fitted with. A rolling bearing having an inner ring, an outer ring and rolling elements;
A fitting member having an annular groove;
The annular groove has a first peripheral surface capable of contacting the outer peripheral surface of the outer ring and a second peripheral surface capable of contacting the inner peripheral surface of the outer ring,
Below the first predetermined temperature, the outer peripheral surface of the outer ring is fitted with a tight margin on the first peripheral surface of the fitting member that is radially opposed to the outer peripheral surface. 1 Above the second predetermined temperature which is lower than the predetermined temperature by a predetermined temperature, the inner peripheral surface of the outer ring has a margin on the second peripheral surface of the fitting member which is radially opposed to the inner peripheral surface The rolling bearing device is characterized by being fitted with. A rolling bearing having an inner ring, an outer ring and rolling elements;
A fitting member having an annular groove;
The annular groove has a first peripheral surface capable of contacting the inner peripheral surface of the inner ring, and a second peripheral surface capable of contacting the outer peripheral surface of the inner ring,
Below the first predetermined temperature, the inner peripheral surface of the inner ring is fitted with a tight margin on the first peripheral surface of the fitting member that is radially opposed to the inner peripheral surface, The outer peripheral surface of the inner ring has a tightening margin on the second peripheral surface of the fitting member that is radially opposed to the outer peripheral surface at a second predetermined temperature that is lower than the first predetermined temperature by a predetermined temperature. The rolling bearing device is characterized by being fitted with. A rolling bearing having an inner ring, an outer ring and rolling elements;
A fitting member having an annular groove;
The annular groove has a first peripheral surface capable of contacting the inner peripheral surface of the inner ring, and a second peripheral surface capable of contacting the outer peripheral surface of the inner ring,
Below the first predetermined temperature, the outer peripheral surface of the inner ring is fitted with a tight margin on the second peripheral surface of the fitting member that is radially opposed to the outer peripheral surface. 1 Above the second predetermined temperature which is lower than the predetermined temperature by a predetermined temperature, the inner peripheral surface of the inner ring has a tightening margin on the first peripheral surface of the fitting member opposed to the inner peripheral surface in the radial direction The rolling bearing device is characterized by being fitted with. In the rolling bearing device according to any one of claims 1 to 4,
The rolling bearing device according to claim 1, wherein the second peripheral surface is present on both sides of the rolling element in the axial direction. The rolling bearing device according to any one of claims 1 to 5,
The rolling bearing device according to claim 1, wherein the fitting member is a damping member made of a damping material. In the rolling bearing device according to claim 6,
A rolling bearing device, wherein the damping material is a twin-type damping alloy material. In the rolling bearing device according to claim 6,
A rolling bearing device, wherein the damping material is a ferromagnetic damping alloy material.

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