JP5574939B2 - Damper bearing device - Google Patents

Description

  The present invention relates to a damper bearing device that performs a damping action (vibration damping action) of a bearing that supports a rotating shaft.

  A damper bearing body that is formed in an annular shape and supports the bearing on the inner peripheral side, is formed in a plane shape in a direction perpendicular to the end face of the damper bearing body, is formed in a fine width, and in the axial direction, the damper bearing body A plurality of slits are provided so as to open at the end face and do not cross each other in the circumferential direction, and the inside of the fine width slit is filled with oil, and the damper bearing is filled with oil in the slit. For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 2004-278580) proposes a damper bearing device configured to damp (attenuate) vibration from a bearing applied to a main body and support the bearing in a housing. .

  In the damper bearing of Patent Document 1, a plurality of slits having a fine width of about several μ are machined by electric discharge machining, laser machining, or the like, and the fine width slit is formed inside a damper bearing body disposed on the outer periphery of the bearing. Are installed through the damper bearing main body in the axial direction without intersecting each other in the circumferential direction.

  The upper part of the damper bearing is provided with an oil supply hole for supplying oil into the slit having a fine width, and further squeezing effect (squeezing) of the oil in the slit supplied through the oil supply hole is further slit. The vibration from the bearing acting on the damper bearing body from the bearing is damped and supported by the spring elasticity of the oil inside.

JP 2004-278580 A

The damper bearing provided in Patent Document 1 (Japanese Patent Application Laid-Open No. 2004-278580) includes a fine-width slit inside the damper bearing body, and the damper bearing body in the axial direction without crossing each other in the circumferential direction. It is installed in a planar shape so as to penetrate through.
Then, oil is supplied into a slit having a fine width from an oil supply hole provided in the upper part of the damper bearing, and the oil in the slit is further squeezed by the squeeze effect (squeezing out), and further from the bearing by the spring elasticity of the oil in the slit. Damping is supported for vibration from the bearing acting on the damper bearing body.

That is, when the radial bearing vibration is applied to the slit, the slit is contracted by a small amount due to the bearing vibration, that is, the oil squeezing effect causes a damping action against the bearing vibration. There is a slight oil leak from the side of the open slit.
The oil leakage from the side portion of the slit may reduce the width of the slit, reduce the action of the squeeze effect by the slit, reduce the damping action of vibration, and eventually eliminate the damping action. . For this reason, oil is supplied into the slit having a fine width from an oil supply hole provided in the upper part of the damper bearing.
However, if the structure of the bearing itself to be supported is of a lubricating oil supply type, it can be used in combination with an oil supply system for a damper bearing, or leakage oil from the slit side can be used as a lubricating oil for the bearing. However, if the structure of the bearing itself to be supported is a self-lubricating type such as a grease-filled type, leakage oil from the slit side part has an adverse effect such as mixing into the sealed grease, and further to the damper bearing device It is necessary to separately provide the oil supply system, which is not preferable from the viewpoint of simplification and weight reduction of the damper bearing device.

  The present invention has been made in view of the problems of the prior art, and in the damper bearing device in which the squeeze effect is achieved by the oil inside the slit, the slit of the slit can be obtained without always supplying oil from the outside to the inside of the slit. The oil leakage from the side is prevented, the squeeze effect is reduced due to the oil leakage, and the vibration damping action is prevented from being reduced, so that the normal vibration damping action can always be achieved, and the damper bearing device It aims to achieve simplification and weight reduction.

The present invention achieves such an object. The first invention of the present invention is a damper bearing main body formed in an annular shape and supporting a bearing on the inner peripheral side, and a planar shape in a direction perpendicular to the end surface of the damper bearing main body. A slit having a plurality of slits formed in the axial direction so as to open in the end face of the damper bearing body and not to cross each other in the circumferential direction. In the damper bearing device configured to damp vibration from the bearing applied to the damper bearing body by the oil in the slit and filled with oil in the slit, the damper bearing device is supported on the inner peripheral side of the damper bearing body. A seal member comprising a self-lubricating type bearing structure, arranged in a circumferential direction along the slit so as to cover an end face of the damper bearing body, and including an elastic body; A seal member and a mounting member for fixing to the damper bearing body, at least a portion of the circumferential region of the damper bearing body, the plurality of slits is provided adjacent to a radial direction, the sealing member is more Each of the crests is disposed at a radial position corresponding to each of the slits to form an oil sump communicating with each of the slits. .

According to this invention, since the seal member fixed to the damper bearing body by the mounting member is arranged in the circumferential direction and covers the side opening of the slit, when radial bearing vibration is applied to the slit, The minute width of the slit shrinks due to the vibration of the bearing and the oil squeeze effect causes oil to leak at the side opening of the slit, but the seal member fixed to the bearing body causes the side opening of the slit to Oil leakage can be prevented.
Therefore, by avoiding a decrease in the squeeze effect due to the leakage of the oil, a decrease in the vibration damping action can be prevented, and a damper bearing device that can always perform a normal damping action can be obtained. As a result, the slit can be filled with grease oil or the like, and the oil can not be replenished during operation of the device.
In addition, since the bearing to be supported is a self-lubricating type bearing structure such as a grease-filled type, it is not necessary to supply lubricating oil from the outside, so that it is not necessary to supply lubricating oil to the damper bearing. Together, the damper bearing device can be simplified and reduced in weight.

  Further, as a specific mounting means for the seal member, the seal member is formed in a bellows shape so as to cover the opening portions of the slits respectively formed in both sides in the axial direction of the damper bearing body. The sealing member is fixed to the bearing body by fitting the mounting member into the recessed portion, so that the bellows-like sealing member made of an elastic body can leak from the opening of the slit. It is flexible enough to be deformed by oil pressure, and can flexibly cope with an increase in oil pressure due to vibration squeeze action.

  Further, the bellows-like uneven portion may be formed corresponding to the opening of the slit formed in the circumferential direction, and leakage oil from the slit opening is absorbed into the bellows-like recess. Oil can be retained and from there it can flow again into the slit.

In the first aspect of the invention, the width of the slit provided in the damper bearing main body between the land portions sandwiching the slit having the fine width and narrowing with respect to the static load of the rotating shaft supported by the bearing. And a spring member for applying an urging force in the direction of expanding the width.
By configuring in this way, when radial bearing vibration is applied to the slit, the slit shrinks a minute width due to the bearing vibration, but between the land portions sandwiching the fine width slit inside the damper bearing body. Provided with a spring member that applies an urging force in the direction of widening the slit that narrows against the static load of the rotating shaft supported by the bearing, tension is applied in the direction of widening the slit by the spring. Therefore, the width of the slit is widened, and it is possible to prevent the minute width of the slit from being contracted by the static load of the rotating shaft supported by the bearing.
Thereby, it is possible to prevent the squeeze effect from being reduced by reducing the width of the slit due to the bearing vibration, and to reduce the amount of oil leakage inside the slit.

  In addition to the application of the urging force of the spring member, if a configuration including a sealing member made of an elastic body so as to cover both end openings in the axial direction of the slit having the fine width is combined, the slit will vibrate with the bearing vibration. The amount of oil leakage can be reduced without reducing the damping action of the bearing, due to the effect that the minute width can be prevented from shrinking and the effect of preventing oil leakage at the side opening of the slit.

In the first invention, the end face of the damper bearing body covered with the seal member is flat, and the seal member is disposed on the outer peripheral side and the inner peripheral side of the position where the slit is provided. So that the center portion sandwiched between the outer peripheral side and the inner peripheral side creates a space between the flat end surface of the damper bearing body. It may be curved.
As described above, since the central portion of the seal member is curved, the central portion of the seal member can be expanded and contracted in the radial direction, and the radial movement of the damper bearing body (slipping or expanding of the slit) due to the bearing vibration is caused. There is no hindrance. Further, the space between the central portion of the seal member and the flat end surface of the damper bearing body functions as an oil reservoir, and can hold oil leaking from the slit.
The sealing member may have a curved bellows at the center.

In this case, the mounting member includes an annular outer peripheral plate member having a diameter corresponding to the outer peripheral side of the seal member, an annular inner peripheral plate member having a diameter corresponding to the inner peripheral side of the seal member, and the outer periphery. A first fastening member for fastening the outer peripheral side plate member and the flat end surface of the damper bearing body with the outer peripheral side of the seal member sandwiched between the side plate member and the flat end surface of the damper bearing main body; The inner peripheral side plate member and the flat end surface of the damper bearing body are fastened with the inner peripheral side of the seal member sandwiched between the inner peripheral side plate member and the flat end surface of the damper bearing main body. 2 fastening members may be included.
Accordingly, the outer peripheral side plate member and the inner peripheral side plate member are fixed in a state where the outer peripheral side and the inner peripheral side of the seal member are in close contact with the flat end surface of the damper bearing body, and oil leakage at the side opening of the slit is ensured. I can stop. In addition, since the seal member is attached to the flat end surface of the damper bearing main body and is fixed by the outer peripheral side plate member and the inner peripheral side plate member, the mounting operation of the seal member to the damper bearing main body can be easily performed.

In the first aspect of the invention, the seal member includes an annular plate member provided along an end surface of the damper bearing body, and the annular plate on the outer peripheral side and the inner peripheral side of the position where the slit is provided. An annular elastic body provided between the member and the end face of the damper bearing main body, and the mounting member is configured to connect the annular plate member to the end face of the damper bearing main body on either the outer peripheral side or the inner peripheral side. It may be a fastening member fastened to.
As a result, the annular plate member presses the elastic body against the end face of the damper bearing body by the fastening force of the fastening member, and oil leakage at the side opening of the slit can be reliably prevented. In addition, since either the outer peripheral side or the inner peripheral side of the annular plate member is fastened to the end face of the damper bearing body, the radial movement of the damper bearing body (shrinkage or expansion of the slit) caused by bearing vibration ) Is not hindered.

In this case, the end face of the damper bearing body has a recess provided between the annular elastic bodies provided on the outer peripheral side and the inner peripheral side of the position where the slit is provided, and communicating with the slit. Also good.
Thereby, the recessed part of the end surface of a damper bearing main body functions as an oil reservoir, and can hold | maintain the oil which leaked from the slit.

The second invention of the present invention is
A damper bearing body that is formed in an annular shape and supports the bearing on the inner peripheral side, and is formed into a fine width extending in a plane perpendicular to the end face of the damper bearing body, and in the axial direction both of the damper bearing body A plurality of slits provided so as not to cross each other in the circumferential direction, and the inside of the slit having a small width is filled with oil, and the damper is filled with oil in the slit. In a damper bearing device configured to dampen vibration from the bearing applied to the bearing body,
The bearing supported on the inner peripheral side of the damper bearing main body is configured by a self-lubricating type bearing structure, and is provided between the pair of land portions sandwiching the slit with the fine width inside the bearing main body. a spring member for applying a biasing force in a direction to widen the width of the slit narrowed for a static load of the rotary shaft supported in,
The spring member extends in a radial direction so as to straddle the pair of land portions forming the slit at an axial position between the both end faces where the slit opens .

By configuring in this way, when radial bearing vibration is applied to the slit, the slit shrinks a minute width due to the bearing vibration, but between the land portions sandwiching the fine width slit inside the damper bearing body. Provided with a spring member that applies an urging force in the direction of widening the slit that narrows against the static load of the rotating shaft supported by the bearing, tension is applied in the direction of widening the slit by the spring. Therefore, the width of the slit is widened, and it is possible to prevent the minute width of the slit from being contracted by the static load of the rotating shaft supported by the bearing.
As a result, it is possible to prevent the squeeze effect from being reduced by reducing the width of the slit due to the vibration of the bearing, and to reduce the amount of oil leakage inside the slit, and the grease oil sealed type structure inside the slit It becomes possible.

  In addition, since the bearing to be supported is a self-lubricating type bearing structure such as a grease-filled type, it is not necessary to supply lubricating oil from the outside, so that it is not necessary to supply lubricating oil to the damper bearing. Together, the damper bearing device can be simplified and reduced in weight.

  According to the first and second aspects of the present invention, in the damper bearing device in which the squeeze effect is achieved by the oil inside the slit, the side portion of the slit can be obtained without always supplying oil from the outside to the inside of the slit. Prevents oil leakage from the oil, reduces the squeeze effect due to such oil leakage, and reduces the damping action of the vibration. In combination with the self-lubricating type bearing structure such as the above, the damper bearing device can be simplified and reduced in weight.

The damper bearing apparatus of the bearing vibration in 1st Embodiment of this invention is shown, (A) is a front view, (B) is AA sectional drawing of (A), (C) is the Z section enlarged view of (B). It is. It is a front view of the damper bearing in 1st Embodiment (the 2) of this invention. It is sectional drawing which follows a rotor axis line which shows an example of the attaching part of the damper bearing of the said 1st Embodiment. The damper bearing apparatus of the bearing vibration in 2nd Embodiment of this invention is shown, (A) is a front view, (B) is BB sectional drawing of (A), (C) is the Y section enlarged view of (B). (D) is DD sectional drawing of (A). The damper bearing apparatus of the bearing vibration in 3rd Embodiment of this invention is shown, (A) is a front view, (B) is CC sectional drawing of (A), (C) is the X section enlarged view of (B). It is. The damper bearing apparatus of the bearing vibration in 4th Embodiment of this invention is shown, (A) is an AA cross-section equivalent figure of FIG. 1, (B) is the U section enlarged view of (A). The structural example of the damper bearing device in 5th Embodiment of this invention is shown, (A) is a front view, (B) is BB sectional drawing of (A). The other structural example of the damper bearing apparatus in 5th Embodiment of this invention is shown, (A) is a front view, (B) is BB sectional drawing of (A). The structural example of the damper bearing device in 6th Embodiment of this invention is shown, (A) is a front view, (B) is BB sectional drawing of (A). The another structural example of the damper bearing device in 6th Embodiment of this invention is shown, (A) is a front view, (B) is BB sectional drawing of (A).

  Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.

(First embodiment)
FIG. 3 is a cross-sectional view taken along the rotor axis showing an example of the mounting portion of the damper bearing of the first embodiment.
In FIG. 3, in this example, the end of the rotating shaft 101 of the supercharger is supported by a ball bearing (bearing) 102, and the outer periphery of the ball bearing 102 is supported by the bearing box 103 via the damper bearing 1. . A bearing box base 104 is mounted on the upper part of the bearing box 103. The ball bearing 102 has a self-lubricating type bearing structure such as a grease-filled type.
The damper bearing 1 is a member which is a gist of the present invention, and includes a damper bearing body 2 formed in an annular shape, slits 6a and 6b provided in the damper bearing body 2, and a seal member 5 made of an elastic body. I have.
Details of the damper bearing 1 will be described later.

FIG. 1 shows a damper bearing device for bearing vibration according to a first embodiment of the present invention, in which (A) is a front view, (B) is a sectional view taken along line AA in (A), and (C) is in (B). It is a Z section enlarged view.
The damper bearing body 2 is formed in an annular shape, and is fixed between the outer periphery of the ball bearing 102 and the inner periphery (indicated by a space 100) of the bearing housing 103 and the bearing housing base 104, as shown in FIG. .
Reference numeral 6a denotes a first slit which extends in a plane shape in a direction perpendicular to the end faces 8 and 9 of the damper bearing body 2 and opens in the axial direction V toward the end faces 8 and 9 of the damper bearing body 2 and has a circumferential shape. In the direction, as shown in FIG. 1, the circular hole is formed from the large-diameter-side circular hole 12f to the small-diameter-side circular hole 12g, and has a width of several μ units (1/1000 to 3/1000 of the diameter). It is a fine slit.
Reference numeral 6b denotes a second slit which extends in a plane shape in a direction perpendicular to the end faces 8 and 9 of the damper bearing body 2 and opens toward the end faces 8 and 9 of the bearing body 2 in the axial direction V. As shown in FIG. 1, it is formed so as to make one round from the circular hole 14a on the large diameter side to the circular hole 14b on the small diameter side, and has a width of several μ units (1/1000 to 3/1000 of the diameter). It is a slit of width.

  The fine slits 6a and 6b are filled with grease oil for vibration damping. In the first embodiment, grease oil is supplied to the fine slits 6a and 6b during operation. The slits 6a and 6b are hermetically sealed.

  The shape of the first slit 6a and the second slit 6b is the same as that of the Patent Document 1 (Japanese Patent Laid-Open No. 2004-278580).

In FIG. 1, seal members 5 and 5 are attached to end surfaces 8 and 9 of the bearing body 2 of the first slit 6 a and the second slit 6 b having a fine width.
The seal members 5 and 5 are formed in a bellows shape 5c so as to cover the opening portions 6s of the slits 6a and 6b in the recessed portions 16 respectively formed in both side portions in the axial direction of the damper bearing main body 2. . A space-like oil sump 10 is formed between the opening 6s of the slits 6a and 6b and the bellows-like part 5c.

The recessed portion 16 has a wider back portion 16s, and the seal members 5 and 5 are pushed into the back portion 16s by seal retainers 7a and 7b formed in an annular shape.
The seal presser 7a is pushed so that the upper side is stretched upward, and the seal member 5 is pushed above the back portion 16s, and the seal presser 7b is pushed so that the lower side is stretched downward, and the seal member 5 is pushed back. It is pressed below 16s. The seal retainers 7a and 7b formed in an annular shape may be separate parts or integrally formed. Furthermore, the form of the seal retainers 7a and 7b is not a push-in type as in the first embodiment, and the seal retainers 7a and 7b may be formed with screws and the seal members 5 and 5 may be retained by a screwing structure.

In the first embodiment, as a general rule, during operation, the fine slits 6a and 6b are not supplied with grease oil for vibration damping, and the slits 6a and 6b are initially filled with oil. It is a sealed type. As shown in FIG. 2, a supply hole 11 is first provided to supply grease oil into the slits 6 a and 6 b having a fine width, and is supplied from the supply hole 11.
The other structure is the same as that of FIG. 1, and the same member is shown with the same code | symbol.

  The operation and effect of the first embodiment will be described.

1 and 3, in this example, the end of the rotating shaft 101 of the turbocharger is supported by a ball bearing 102, and the outer periphery of the ball bearing 102 is provided with a bearing box 103 and a bearing box base 104 via the damper bearing 1. It is supported by.
During the operation of the supercharger, when radial bearing vibrations were applied to the slits 6a and 6b, the slits 6a and 6b were contracted by a minute amount due to the bearing vibrations and accumulated in the slits 6a and 6b. The oil reduces the width of the slits 6a and 6b due to the vibration of the bearing, and the oil inside the slits 6a and 6b tends to leak from the side opening 6s of the slit due to the squeeze effect.

  However, seal members 5 and 5 are attached to the end surfaces 8 and 9 of the damper bearing main body 2 of the first slit 6a and the second slit 6b having the fine width. Accordingly, the seal members 5 and 5 are provided with the bellows-like portion 5c so as to cover the opening portions 6s of the slits 6a and 6b in the recessed portions 16 respectively provided on both side portions in the axial direction V of the damper bearing body 2. Therefore, the seal members 5 and 5 fixed to the bearing body 2 can prevent oil leakage at the side openings 6s of the slits 6a and 6b.

Therefore, the leakage of the oil is prevented, and the reduction of the squeeze effect due to the leakage of the oil can be avoided, whereby the reduction of the vibration damping action can be prevented and the damper bearing 1 capable of always performing a normal damping action is obtained. It is done.
As a result, the slits 6a and 6b can be filled with grease oil or the like, and the oil can not be replenished during operation of the device.
Further, since the ball bearing 102 to be supported has a self-lubricating type bearing structure such as a grease-filled type, it is not necessary to supply lubricating oil from the outside, so that it is not necessary to supply lubricating oil to the damper bearing 1. In combination with this structure, the damper bearing device can be simplified and reduced in weight.

(Second Embodiment)
4A and 4B show a bearing vibration damper bearing device according to a second embodiment of the present invention, in which FIG. 4A is a front view, FIG. 4B is a sectional view taken along line BB in FIG. (D) is a DD sectional view of (A).
In the second embodiment, bellows-like portions are formed in the two peak portions 5a and 5b so as to cover the openings 6s of the slits 6a and 6b, respectively.
Other configurations are the same as those of the first embodiment (FIG. 1), and the same members are denoted by the same reference numerals.

  According to the second embodiment, since the seal member 5 is formed in the bellows shape of the two peaks 5a and 5b made of an elastic body that respectively covers the openings 6s of the slits 6a and 6b, it is made of an elastic body. The seal member 5 of the bellows-like portions 5a and 5b is flexible such that it can be freely deformed by the oil pressure of leakage from the openings 6s of the slits 6a and 6b, and can flexibly cope with an increase in oil pressure due to squeeze action. .

  Further, since the two peak portions 5a and 5b of the bellows-like uneven portion are formed corresponding to the openings 6s of the slits 6a and 6b formed in the circumferential direction, leakage from the openings of the respective slits. Oil is absorbed into the oil sumps 10a, 10b formed by the two peaks 5a, 5b, where it retains leaking oil and from there it can flow again into the slits 6a, 6b.

(Third embodiment)
5A and 5B show a bearing vibration damper bearing device according to a third embodiment of the present invention, where FIG. 5A is a front view, FIG. 5B is a sectional view taken along the line CC in FIG. 5A, and FIG. FIG.
In the third embodiment, a spring member 20 is provided inside the center of the damper bearing body 2 in FIG.
As shown in FIG. 5C, the spring member 20 is provided between one of the fine slits 6a and 6b in the radial direction T and between the land portions 2s and 2t sandwiching the slit 6b. And a spring 21 for applying an urging force in the direction of increasing the width of the slit 6b. Reference numeral 22 denotes a plug for adjusting the mounting load of the spring 21. Further, the urging force of the spring 21 applies the urging force in the direction of increasing the width of the slit that narrows with respect to the static load of the rotating shaft supported by the ball bearing 102.
In FIG. 5, the shape of the slits 6a and 6b is the same as that of the first embodiment, and the same members are denoted by the same reference numerals.

According to the third embodiment, when the bearing vibration in the radial direction T is applied to the slit 6b, the minute width is contracted by the bearing vibration, but the slit 6b has a fine width slit in the center of the damper bearing body 2. One slit 6b of 6a and 6b is formed in the radial direction T, and the width of the slit narrowing with respect to the static load of the rotating shaft supported by the ball bearing 102 is set between the land portions 2s and 2t sandwiching the slit 6b. By providing the spring member 20 having the spring 21 for applying the urging force in the expanding direction, the width of the slit 6b is increased by the spring 21 in the direction in which the width of the slit 6b is increased. It is possible to prevent the minute width of the slit 6b from being contracted by the static load of the rotating shaft.
As a result, the width of the slit 6b is reduced by the bearing vibration, and the effect of the squeeze effect due to the reduction in the width of the slit 6b can be prevented, and the amount of oil leakage inside the slit can be reduced. It is possible to eliminate the need for oil replenishment during operation of the device by filling grease oil or the like in the container.
Note that the mounting load of the spring 21 can be adjusted by the allowance of the plug 22.

(Fourth embodiment)
6A and 6B show a bearing vibration damper bearing device according to a fourth embodiment of the present invention, in which FIG. 6A is a cross-sectional view taken along the line AA in FIG. 1 and FIG.
The fourth embodiment is a combination of the first embodiment (FIG. 1) and the third embodiment (FIG. 5).

That is, as shown in FIGS. 6 (A) and 6 (B), in the first embodiment (FIG. 1), the first and second slits 6a and 6b of the fine width of the damper bearing body 2 are arranged. Seal members 5 and 5 are attached to the end faces 8 and 9.
The seal members 5 and 5 are formed in a bellows shape 5c so as to cover the opening portions 6s of the slits 6a and 6b in the recessed portions 16 respectively formed in both side portions in the axial direction of the damper bearing main body 2. . A space-like oil sump 10 is formed between the opening 6s of the slits 6a and 6b and the bellows-like part 5c.
The recessed portion 16 has a wider back portion 16s, and the seal members 5 and 5 are pushed into the deep portion 16s by annular seal retainers 7a and 7b.
The seal presser 7a is pushed so that the upper side is stretched upward, and the seal member 5 is pushed above the back portion 16s, and the seal presser 7b is pushed so that the lower side is stretched downward, and the seal member 5 is pushed back. It is pressed below 16s.

  In addition, as shown in FIG. 6B, the spring member 20 has one slit 6b of the fine width slits 6a and 6b in the radial direction T, and between the land portions 2s and 2t sandwiching the slit 6b. A spring 21 is provided that applies an urging force in a direction to increase the width of the slit that narrows against the static load of the rotating shaft supported by the ball bearing 102. Reference numeral 22 denotes a plug for adjusting the mounting load of the spring 21.

According to this 4th Embodiment, there exists an effect | action and effect which combined the said 1st Embodiment (FIG. 1) and 3rd Embodiment (FIG. 5).
That is, the effect of the first embodiment (FIG. 1) is that the seal member 5 fixed to the damper bearing body 2 by the seal retainers 7a and 7b is arranged in the circumferential direction, and the side openings 6s of the slits 6a and 6b. When the bearing vibration in the radial direction is applied to the slits 6a and 6b, the slits 6a and 6b are contracted by a minute amount due to the bearing vibration, and the oil in the side openings 6s of the slits 6a and 6b is caused by the squeeze effect of the oil. However, the seal member 5 fixed to the bearing body 2 can prevent oil leakage at the side openings 6s of the slits 6a and 6b, thereby avoiding a decrease in the squeeze effect due to the oil leakage. By doing so, it is possible to prevent the vibration damping action from decreasing.

The effect of the third embodiment (FIG. 5) is that when a radial bearing vibration is applied to the slits 6a and 6b, a minute width of the slits 6a and 6b is contracted by the bearing vibration. Inside, one slit 6b out of the slits 6a and 6b having a small width is provided in the radial direction T, and between the land portions 2s and 2t sandwiching the slit 6b, against the static load of the rotating shaft supported by the ball bearing 102 By providing the spring member 20 having the spring 21 for applying an urging force in the direction of widening the narrowing slit, the width of the slit 6b is widened, and the static load of the rotating shaft supported by the ball bearing 102 is increased. It is possible to prevent the minute width of the slit 6b from shrinking.
Accordingly, the width of the slit 6b is reduced by the bearing vibration, and the effect of the squeeze effect due to the reduction in the width of the slit 6b can be prevented, and the amount of oil leakage inside the slit can be reduced. It is possible to prevent the minute width from being contracted by the bearing vibration.
The two effects can be demonstrated together. As a result, it is possible to more effectively achieve a structure in which the slits 6a and 6b are filled with grease oil or the like and oil is not replenished during operation of the device.
Other elements are the same as those in the first and third embodiments, and the same members are denoted by the same reference numerals.

(Fifth embodiment)
FIG. 7: shows the structural example of the damper bearing apparatus in 5th Embodiment of this invention, (A) is a front view, (B) is BB sectional drawing of (A). FIG. 8 is a cross-sectional view showing another configuration example of the damper bearing device in the fifth embodiment.

  In the present embodiment, as shown in FIG. 7B, the end surfaces 8 and 9 of the damper bearing body 2 covered with the seal member 5 are flat. As shown in FIGS. 7A and 7B, the flat end surfaces 8 and 9 of the damper bearing body 2 are provided with an annular outer peripheral seal pressing plate 30 (corresponding to an “outer peripheral plate member”) and an annular inner surface. A peripheral seal pressing plate 32 (corresponding to “inner peripheral side plate member”) is attached by a bolt 33 (corresponding to “first fastening member”) and a bolt 34 (corresponding to “second fastening member”).

The outer peripheral end portion 36 of the seal member 5 is held between the outer peripheral side seal pressing plate 30 and the flat end surfaces 8 and 9 of the damper bearing main body 2, and the flat end surfaces 8 and 9 of the damper bearing main body 2 are held. It is in close contact with. Similarly, the inner peripheral end portion 38 of the seal member 5 is held between the inner peripheral side seal retainer plate 32 and the flat end surfaces 8 and 9 of the damper bearing main body 2 so that the flatness of the damper bearing main body 2 is maintained. Close end faces 8 and 9.
Accordingly, oil leakage at the side openings of the slits 6a and 6b can be reliably prevented. Further, since the seal members are attached to the flat end surfaces 8 and 9 of the damper bearing main body 2 and are fixed by the seal pressing plates 30 and 32, the mounting operation of the seal member 5 to the damper bearing main body 2 is easily performed. be able to.

  Further, the seal member 5 is curved so that a central portion sandwiched between the outer peripheral end portion 36 and the inner peripheral end portion 38 creates a space 39 between the flat end surfaces 8 and 9 of the damper bearing body 2. And can be expanded and contracted in the radial direction. For this reason, the radial movement (shrinkage or expansion of the slits 5a, 5b) of the damper bearing main body 2 due to the bearing vibration is not hindered. Further, a space 39 between the central portion of the seal member 5 and the flat end surfaces 8 and 9 of the damper bearing body 2 functions as an oil reservoir, and can hold oil leaking from the slits 6a and 6b.

  FIG. 7B shows an example of the sealing member 5 curved so that the central portion swells by one mountain, but the sealing member 5 is provided between the outer peripheral end portion 36 and the inner peripheral end portion 38. The present invention is not limited to this example as long as the central portion is curved and the space 39 can be formed between the flat end surfaces 8 and 9 of the damper bearing body 2. For example, as shown in FIG. 8, the seal member 5 may have a bellows shape at the center between the outer peripheral end portion 36 and the inner peripheral end portion 38.

(Sixth embodiment)
9A and 9B show a configuration example of a damper bearing device according to a sixth embodiment of the present invention, in which FIG. 9A is a front view and FIG. 9B is a sectional view taken along line BB in FIG. 10A and 10B show another configuration example of the damper bearing device according to the sixth embodiment, in which FIG. 10A is a front view and FIG. 10B is a sectional view taken along line BB in FIG.

  In this embodiment, as shown in FIGS. 9A and 9B, the seal member 5 includes an annular seal pressing plate 40 (corresponding to an “annular plate member”) and an annular O-ring 42 (“annular” Corresponding to “an elastic body”. The annular seal pressing plate 40 is provided along the end surfaces 8 and 9 of the damper bearing body 2. The seal retainer plate 40 not only presses the O-ring 42 against the end surfaces 8 and 9 of the damper bearing body 2 to ensure the sealing performance of the O-ring 42 but also covers the slits 6a and 6b to prevent oil leakage. Take a role. The O-ring 42 is provided between the seal pressing plate 40 and the end surfaces 8 and 9 of the damper bearing body 2 (specifically, the end surfaces 8 and 9) on the outer peripheral side and the inner peripheral side of the positions where the slits 6 a and 6 b are provided. In the groove provided in

The outer peripheral side of the seal pressing plate 40 is fixed to the end surfaces 8 and 9 of the damper bearing body 2 by bolts 44. Therefore, the seal retainer plate 40 presses the O-ring 42 against the end surfaces 8 and 9 of the damper bearing body 2 by the fastening force of the bolts 44, so that oil leakage at the side openings of the slits 6a and 6b can be reliably prevented. .
Further, since only the outer peripheral side of the seal retainer plate 40 is fastened to the end faces 8 and 9 of the damper bearing body 2 by the bolts 44, the radial movement of the damper bearing body 2 caused by the bearing vibration (the slits 6a and 6b) Shrinkage or expansion) is not prevented.

  Moreover, the end surfaces 8 and 9 of the damper bearing main body 2 may have a recess 46 communicating with the slits 6a and 6b between the O-rings 42 on the outer peripheral side and the inner peripheral side of the slits 6a and 6b. Thereby, the recessed part 46 of the end surfaces 8 and 9 of the damper bearing main body 2 functions as an oil reservoir, and the oil leaked from the slits 6a and 6b can be held.

  9A and 9B show an example in which the outer peripheral side of the seal retainer plate 40 is fixed to the end surfaces 8 and 9 of the damper bearing main body 2, but these are shown in FIGS. 10A and 10B. As described above, the inner peripheral side of the seal pressing plate 40 may be fixed to the end surfaces 8 and 9 of the damper bearing body 2 by the bolts 44.

  According to the present invention, in the damper bearing device in which the squeeze effect is achieved by the oil inside the slit, oil leakage from the side portion of the slit can be prevented without supplying oil from the outside to the inside of the slit at all times. Therefore, the squeeze effect can be prevented from decreasing due to the leakage of oil and the vibration damping action can be prevented, and the normal vibration damping action can always be achieved, and the damper bearing device can be simplified and lightened. A damper bearing device can be provided.

DESCRIPTION OF SYMBOLS 1 Damper bearing 2 Damper bearing main body 2s, 2t Land part 5 Seal member 5a, 5b Bellows-like peak part 5c Bellows-like part 6a, 6b Slit 6s Slit opening 7a, 7b Seal presser 8, 9 End surface
DESCRIPTION OF SYMBOLS 10 Oil sump 11 Oil supply hole 16 Recessed part 16s Deep part 20 Spring member 21 Spring 22 Plug 30 Outer peripheral side seal pressing plate 32 Inner peripheral side seal pressing plate 33, 34 Bolt 36 Outer peripheral end 38 Inner peripheral end 39 Space 40 Seal presser Plate 42 O-ring 44 Bolt 46 Recess 12g, 12f, 14a, 14b Circular hole 101 Rotating shaft 102 Ball bearing 103 Bearing box V Axial direction T Radial direction

Claims (10)

A damper bearing body that is formed in an annular shape and supports the bearing on the inner peripheral side, and is formed into a fine width extending in a plane perpendicular to the end face of the damper bearing body, and the end face of the damper bearing body in the axial direction And a plurality of slits provided so as not to cross each other in the circumferential direction, and the inside of the slit having a small width is filled with oil, and the damper bearing body is filled with oil in the slit. In a damper bearing device configured to damp vibration from the bearing applied to the bearing,
The bearing supported on the inner peripheral side of the damper bearing body is constituted by a self-lubricating type bearing structure, and is arranged in the circumferential direction along the slit so as to cover the end surface of the damper bearing body, and an elastic body And a mounting member that fixes the seal member to the damper bearing body .
In at least a partial circumferential region of the damper bearing body, the plurality of slits are provided adjacent to each other in the radial direction, and the seal member is configured in a bellows shape having a plurality of ridges, and each of the ridges Is disposed at a radial position corresponding to each of the slits to form an oil sump communicating with each of the slits .   The seal member is formed in an accordion shape so as to cover the openings of the slits respectively formed in both side portions in the axial direction of the bearing body, and the mounting member is fitted into the recesses to thereby The damper bearing device according to claim 1, wherein the seal member is configured to be fixed to the bearing body. A biasing force is applied in the direction of increasing the width of the slit, which is provided in the bearing body between the land portions sandwiching the fine slit and narrows against the static load of the rotating shaft supported by the bearing. damper bearing device according to claim 1, further comprising a spring member. The slits open on both end faces in the axial direction of the damper bearing body,
The spring member is extended in a radial direction so as to straddle a pair of land portions forming the slit at an axial position between the both end faces where the slit opens. 4. The damper bearing device according to 3 . The end face of the damper bearing body covered by the seal member is flat,
The seal member is fixed by the mounting member so as to be in close contact with the flat end surface of the damper bearing body on the outer peripheral side and inner peripheral side of the position where the slit is provided, and the outer peripheral side and inner peripheral side The damper bearing device according to claim 1, wherein a central portion sandwiched between sides is curved so as to create a space between the flat end surface of the damper bearing body. The mounting member is
An annular outer peripheral plate member having a diameter corresponding to the outer peripheral side of the seal member;
An annular inner peripheral side plate member having a diameter corresponding to the inner peripheral side of the seal member;
A first fastening member that fastens the outer peripheral plate member and the flat end surface of the damper bearing body with the outer peripheral side of the seal member sandwiched between the outer peripheral plate member and the flat end surface of the damper bearing main body. When,
The inner peripheral side plate member and the flat end surface of the damper bearing body are fastened with the inner peripheral side of the seal member sandwiched between the inner peripheral side plate member and the flat end surface of the damper bearing main body. The damper bearing device according to claim 5, further comprising two fastening members.   The damper bearing device according to claim 5 or 6, wherein the curved central portion has a bellows shape. The seal member includes an annular plate member provided along an end surface of the damper bearing main body, and an end surface of the annular plate member and the damper bearing main body on an outer peripheral side and an inner peripheral side of the position where the slit is provided. An annular elastic body provided between
2. The damper bearing device according to claim 1, wherein the attachment member is a fastening member that fastens the annular plate member to an end surface of the damper bearing body on one of the outer peripheral side and the inner peripheral side.   The end face of the damper bearing main body has a recess provided between the annular elastic bodies provided on the outer peripheral side and the inner peripheral side of the position where the slit is provided, and communicating with the slit. Item 9. A damper bearing device according to Item 8. A damper bearing body that is formed in an annular shape and supports the bearing on the inner peripheral side, and is formed into a fine width extending in a plane perpendicular to the end face of the damper bearing body, and in the axial direction both of the damper bearing body A plurality of slits provided so as not to cross each other in the circumferential direction, and the inside of the slit having a small width is filled with oil, and the damper is filled with oil in the slit. In a damper bearing device configured to dampen vibration from the bearing applied to the bearing body,
The bearing supported on the inner peripheral side of the damper bearing main body is configured by a self-lubricating type bearing structure, and is provided between the pair of land portions sandwiching the slit with the fine width inside the bearing main body. a spring member for applying a biasing force in a direction to widen the width of the slit narrowed for a static load of the rotary shaft supported in,
The damper member is characterized in that the spring member extends in a radial direction so as to straddle the pair of land portions forming the slit at an axial position between the both end faces where the slit opens. apparatus.

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