JP2009083575A - Stabilizer bush - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stabilizer bush having a lip which has the easy assembling property substantially equivalent to that of a stabilizer bush having no lip without affecting the spring characteristic, and suppresses degradation of the pressing force against a stabilizer bar. <P>SOLUTION: Lips 12, 13 projecting inwardly in the radial direction are provided at least on one of opening ends on an inner circumferential surface of a stabilizer bush 10. Recesses 16a-16d, 17a-17d opened on the outer circumferential side are formed on the outer side in the radial direction of the lips 12, 13. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a stabilizer bush that is made of a cylindrical rubber elastic body, has a stabilizer bar inserted and held in a through hole, and is fixed to a vehicle body by pressing an outer surface by a fastening member.

  As the stabilizer bush, in order to prevent foreign matter from entering from the opening end of the inner peripheral surface, a lip projecting radially inward is formed at both ends of the opening. No. 184792 (Patent Document 1), Japanese Patent Application Laid-Open No. 2007-50777 (Patent Document 2) and International Publication No. 2006/112092 (Patent Document 3).

  However, in the stabilizer bush described in FIG. 8 of Patent Document 1, since the lip is located in the radially inward portion with respect to the outer peripheral flange portion, the lip affects the spring characteristics of the stabilizer bush. Become. Therefore, when designing the spring characteristics, the shape of the lip must be taken into account, which is not easy in design. Furthermore, in this case, it is difficult to assemble the stabilizer bar as compared with the case where the lip is not provided.

On the other hand, the stabilizer bushes described in Patent Documents 2 and 3 solve the problem in Patent Document 1. Specifically, the stabilizer bush described in Patent Document 2 has a lip that protrudes outward in the axial direction from a portion corresponding to the flange portion, so that it does not affect the spring characteristics and is almost the same as when there is no lip. Equivalent ease of assembly. Moreover, the stabilizer bush of patent document 3 forms the annular recessed part opened to an axial direction end surface among the radial direction outer sides of a lip. In this case, the lip does not affect the spring characteristics, and the assembly is almost as easy as the case without the lip.
Japanese Patent Laid-Open No. 10-184792 (FIG. 8) JP 2007-50777 A International Publication No. 2006/112092 Pamphlet

  However, in the stabilizer bushes described in Patent Documents 2 and 3, since the axially outward side of the lip is a free end, for example, the vibration of the stabilizer bar is continuously generated while the vehicle is running. The free end side of the As a result, when the pressing force of the lip against the stabilizer bar is reduced and the stabilizer bar vibrates, the lip does not follow the vibration. And a clearance gap generate | occur | produces between a lip and a stabilizer bar, and there exists a possibility that a foreign material may penetrate | invade into an internal peripheral surface from the said clearance gap. If foreign matter enters the inner peripheral surface of the stabilizer bar, there is a risk of rattling or abnormal noise between the stabilizer bar.

  The present invention has been made in view of such circumstances, and suppresses a decrease in the pressing force against the stabilizer bar while not affecting the spring characteristics and making the assembly almost as easy as when there is no lip. An object of the present invention is to provide a stabilizer bush having a lip that can be used.

The stabilizer bush of the present invention is
A stabilizer bush made of a cylindrical rubber elastic body, holding a stabilizer bar in the through hole, and being fixed to the vehicle body by pressing the outer surface by a fastening member,
A lip projecting radially inward is provided on at least one of the opening ends of the inner peripheral surface,
A recess is formed on the outer side in the radial direction of the lip.

  According to the present invention, since the opening of the recess is on the outer peripheral side, the lip does not have a free end as in Patent Documents 2 and 3. Accordingly, it is possible to suppress lip sag. As a result, it can suppress that the pressing force with respect to the stabilizer bar by a lip falls. That is, it is possible to suppress the occurrence of a gap with the stabilizer bar due to the lip sag. Thereby, the foreign substance penetration | invasion prevention effect can be heightened.

  Further, in the portion where the recess is formed among the portions where the lip is formed, the lip is easily deformed. Therefore, by forming the recess, the lip can be prevented from affecting the spring characteristics. At the same time, since the lip is easily deformed by forming the concave portion, the assembly is almost as easy as the case without the lip.

  Preferably, a rubber filling portion filled with a rubber elastic body may be provided at a position on the radially outer side of the lip and adjacent to the concave portion in the circumferential direction. That is, the concave portion is not formed over the entire circumference. For example, when the number of the concave portions is one in the circumferential direction, the remaining portion other than the concave portions becomes the rubber filling portion. When two or more concave portions are formed in the circumferential direction, the rubber filling portion corresponds to a partition member that partitions adjacent concave portions. Moreover, the rubber filling portion may be connected to the entire radial direction, or a portion that does not exist in a part of the radial direction may be included. Thus, by providing the rubber filling portion, it is possible to increase the pressing force of the lip against the stabilizer bar as compared with the case where the recess is formed on the entire circumference in the circumferential direction, and it is possible to suppress the lip sag. In addition, it is better to form the rubber filling part in a part of the circumferential direction as compared with the case where the concave part is formed in the entire circumferential direction, but it is also possible to form the recessed part in the entire circumferential direction.

  Further, in the stabilizer bush of the present invention, the stabilizer bar is torsionally deformed, and a shaft portion that is inserted and held in the stabilizer bush, and an arm portion that is bent at the end portion of the shaft portion and contacts the stabilizer bush. The rubber filling portion may be arranged in a predetermined angle range in which the arm portion contacts the stabilizer bush when the shaft center of the shaft portion is the center.

  The stabilizer bar acts on the vehicle body in the direction of relative movement in the left-right direction of the vehicle, that is, the axial direction of the shaft portion. And a stabilizer bush may exhibit the function as a stopper which controls the axial movement of a stabilizer bar. Specifically, when the arm portion of the stabilizer bar comes into contact with the stabilizer bush, the stabilizer bush functions as a stopper.

  Here, in the portion where the concave portion is formed, the amount of deformation when receiving the axial force is larger than in the portion where the rubber filling portion is disposed. Therefore, by disposing the rubber filling portion in the predetermined angle range in the predetermined angle range in which the arm portion contacts the stabilizer bush, the deformation amount when the axial force is received in the range can be reduced. That is, by arranging the rubber filling portion in a predetermined angle range in which the arm portion comes into contact, the stabilizer bush can surely exhibit the function as a stopper of the arm portion.

  In particular, the rubber filling portion may be disposed over the entire range of the predetermined angle range. By doing in this way, even if it is a case where an arm part is located in which angle of a movable range, the stabilizer bush can exhibit the function as a stopper of an arm part reliably.

  Moreover, the stabilizer bush of this invention WHEREIN: The said recessed part is good to open to the site | part except the said vehicle body side among the said outer peripheral surfaces. That is, the opening of the concave portion is not formed on the vehicle body side. Here, if the concave portion is open to the vehicle body side, the edge portion of the concave portion in contact with the vehicle body may buckle and fall down. In particular, the rubber portion on the axially outward side of the recess may buckle and fall axially outward. If it does so, there exists a possibility that the pressing force to the stabilizer bar by a lip may fall. Therefore, since the opening of the recess is not formed on the vehicle body side, it is possible to prevent the collapse due to buckling, and as a result, it is possible to prevent the pressing force against the stabilizer bar due to the lip.

  Moreover, the stabilizer bush of this invention WHEREIN: The said recessed part is good to open in the position shifted | deviated to the axial direction with respect to the said fastening member. That is, the opening of the recess is not formed in the pressing portion by the fastening member. Here, if the opening of the concave portion exists in the pressing portion by the fastening member, the edge portion of the concave portion may buckle and fall down. In particular, the rubber portion on the axially outward side of the recess may buckle and fall axially outward. If it does so, there exists a possibility that the pressing force to the stabilizer bar by a lip may fall. Accordingly, since the opening of the concave portion is not formed in the pressing portion by the fastening member, it is possible to prevent the occurrence of the collapse due to buckling, and as a result, it is possible to prevent the pressing force against the stabilizer bar by the lip.

<First embodiment>
Next, the stabilizer bush 10 of 1st embodiment is demonstrated with reference to FIGS. FIG. 1 is a view of the stabilizer bush 10 of the first embodiment viewed from the radial direction in a state where the stabilizer bush 10 is assembled to a vehicle. 2 is a cross-sectional view taken along the line AA in FIG. FIG. 3 is a view of the stabilizer bush 10 according to the first embodiment as viewed from the radial direction. 4 is a cross-sectional view taken along line BB in FIG. 5 is a cross-sectional view taken along the line CC of FIG. 6 is a cross-sectional view taken along the line DD of FIG.

  As shown in FIG. 1 and FIG. 2, the stabilizer bush 10 is made of a cylindrical rubber elastic body, and the stabilizer bar 20 is inserted and held in the through hole. Here, the stabilizer bar 20 is made of a round bar-shaped steel material having the same outer diameter, and has a U-shape when viewed from above the vehicle. Specifically, the stabilizer bar 20 is torsionally deformed and has a shaft portion 21 inserted and held in the stabilizer bush 10, and an arm portion 22 that is bent at both ends of the shaft portion and contacts the end portion of the stabilizer bush 10. With. Then, the U-shaped ends of the stabilizer bar 20, that is, the end portions of the arm portions 22, are connected to suspension arms (not shown) that support the left and right wheels (not shown), respectively.

  Further, the stabilizer bush 10 is fixed to the vehicle body 40 (suspension member) with the outer peripheral surface thereof being pressed by the fastening member 30. Here, as shown in FIG. 2, the fastening member 30 is made of metal and includes a U-shaped portion 31 and a flange portion 32. The U-shaped portion 31 has a U-shape that presses the outer peripheral surface of the stabilizer bush 10. The axial cross-sectional shape of the pressing surface (U-shaped inner surface) of the U-shaped portion 31 is a straight line parallel to the central axis. The flange portion 32 is a portion that is provided so as to extend outward from both ends of the opening of the U-shaped portion 31 and is attached to the vehicle body 40 by a bolt (not shown).

  Below, the detail of the stabilizer bush 10 is demonstrated. As described above, the stabilizer bush 10 is made of a cylindrical rubber elastic body. As the rubber material of the stabilizer bush 10, a self-lubricating rubber having good slidability is preferably used.

  On the inner peripheral surface of the stabilizer bush 10, an inner peripheral portion 11 having the same diameter and lips 12 and 13 are formed. The inner peripheral portion 11 having the same diameter is formed in the central portion in the axial direction on the inner peripheral surface of the stabilizer bush 10 so that the inner diameter is the same in the axial direction. The inner diameter portion 11 of the same diameter is formed to be equal to or slightly smaller than the outer diameter of the shaft portion 21 of the stabilizer bar 20. The lips 12 and 13 are formed so as to protrude radially inward from the inner peripheral portion 11 having the same diameter at both ends of the inner peripheral portion 11 having the same diameter, that is, both ends of the opening of the inner peripheral surface of the stabilizer bush 10. These lips 12 and 13 are formed so that the amount of protrusion inward in the radial direction increases toward the opening side. That is, the inner diameters of the lips 12 and 13 are formed so as to decrease toward the respective opening sides. Therefore, the inner diameters of the lips 12 and 13 are smaller than the outer diameter of the shaft portion 21 of the stabilizer bar 20.

  Further, on the outer peripheral surface of the stabilizer bush 10, an outer peripheral flat portion 14, a U-shaped concave portion 15, and a pair of U-shaped flange portions 16, 17 are formed. The outer periphery flat part 14 is the lower surface of FIGS. 1-6, and is formed in flat surface shape. The outer peripheral flat portion 14 is a portion that comes into contact with the vehicle body 40.

  The U-shaped concave portion 15 is the central portion in the axial direction, and is formed so that the radial cross-sectional shape is a U-shape. The U-shaped concave portion 15 is formed so that the U-shaped opening side is a part of the outer peripheral flat portion 14. The U-shaped concave portion 15 is a portion that is pressed by the fastening member 30.

  The pair of U-shaped flange portions 16, 17 protrudes radially outward from the U-shaped concave portion 15 at both axial ends of the U-shaped concave portion 15 and has a U-shaped radial cross-sectional shape. It is formed so as to have a mold shape. That is, the U-shaped concave portion 15 is formed to be recessed in the radial direction by forming the pair of U-shaped flange portions 16 and 17 so as to protrude radially outward with respect to the U-shaped concave portion 15. Will be. One U-shaped flange portion 16 is positioned on the radially outer side of the lip 12, and the other U-shaped flange portion 17 is positioned on the radially outer side of the lip 13.

  Further, the pair of U-shaped flange portions 16 and 17 are formed with recesses 16a to 16d and 17a to 17d that open to the outer peripheral side. The concave portions 16a and 17a are formed on the lower left side in FIG. 4 of the U-shaped flange portions 16 and 17, and are open on the left side in FIG. The concave portions 16b and 17b are formed on the lower right side in FIG. 4 of the U-shaped flange portions 16 and 17, and are open on the right side in FIG. The recessed portions 16c and 17c are formed on the upper left side in FIG. 4 of the U-shaped flange portions 16 and 17, and are opened on the left side in FIG. The concave portions 16d and 17d are formed in the upper right side in FIG. 4 of the U-shaped flange portions 16 and 17, and are open on the right side in FIG.

  That is, the recesses 16 a to 16 d are formed on the radially outer side of the lip 12. On the other hand, the recesses 17 a to 17 d are formed on the radially outer side of the lip 13. Further, none of the recesses 16 a to 16 d and 17 a to 17 d are open to the outer peripheral flat portion 14. In other words, the recesses 16a to 16d and 17a to 17d are open to a portion excluding the vehicle body 40 side when assembled to the vehicle. In other words, the entire surface of the outer peripheral flat part 14 having no opening is in contact with the vehicle body 40.

  Further, the pair of U-shaped flange portions 16 and 17 are located at positions shifted in the axial direction with respect to the U-shaped concave portion 15. That is, the recesses 16 a to 16 d and 17 a to 17 d are opened at positions shifted in the axial direction with respect to the fastening member 30 disposed in the U-shaped recess 15. In other words, the edge portions of the recesses 16 a to 16 d and 17 a to 17 d are not pressed by the fastening member 30.

  Moreover, in the U-shaped flange part 16, that the plurality of recesses 16a to 16d are formed means that the rubber filling parts 16e to 16h that partition the circumferentially adjacent recesses 16a to 16d are formed. Become. The rubber filling portions 16e to 16h are portions that are radially outward of the lip 12 and filled with rubber elastic bodies at positions adjacent to the recesses 16a to 16d in the circumferential direction. Further, in the U-shaped flange portion 17, a plurality of concave portions 17 a to 17 d are formed, which means that rubber filling portions 17 e to 17 h that partition the circumferentially adjacent concave portions 17 a to 17 d are formed. Become. The rubber filling portions 17e to 17h are portions that are radially outward of the lip 13 and filled with rubber elastic bodies at positions adjacent to the recesses 17a to 17d in the circumferential direction.

  The stabilizer bush 10 having the above-described configuration provides the following effects. First, by having the lips 12 and 13 at both ends of the opening in the axial direction, the pressing force of the lip 12 and 13 against the shaft portion 21 of the stabilizer bar 20 is increased. Accordingly, it is possible to prevent foreign matter from entering from the outside.

  Further, recesses 16a to 16d and 17a to 17d are formed on the outer sides of the lips 12 and 13 in the radial direction. Accordingly, in the portions where the concave portions 16a to 16d and 17a to 17d are formed, the lips 12 and 13 are easily deformed radially outward. Accordingly, the lips 12 and 13 can be prevented from affecting the spring characteristics of the stabilizer bush 10. At the same time, since the lips 12 and 13 are easily deformed, the ease of assembling the stabilizer bush 10 to the shaft portion 21 of the stabilizer bar 20 is substantially the same as when the lips 12 and 13 are not provided.

  Further, the lips 12 and 13 are not shaped to have a free end as in the prior art on the opening side in the axial direction. The axially open ends of the lips 12 and 13 are connected to disk-shaped rubber portions that are both axial end surfaces of the stabilizer bush 10. Therefore, it is possible to suppress the sag of the lips 12 and 13. As a result, it can suppress that the pressing force with respect to the axial part 21 of the stabilizer bar 20 by the lips 12 and 13 falls. That is, it can suppress that a clearance gap generate | occur | produces between the axial parts 21 of the stabilizer bar 20 resulting from the sag of the lip | rips 12 and 13, and can improve the foreign material penetration effect.

  Further, the presence of the rubber filling portions 16e to 16g and 17e to 17g acts to suppress deformation of the lips 12 and 13 on the opening end side in the axial direction. That is, the rubber filling portions 16e to 16g and 17e to 17g can increase the pressing force of the lip 12 and 13 against the shaft portion 21 of the stabilizer bar 20, and can suppress the lip 12 and 13 from being slid.

  Further, the recesses 16 a to 16 d and 17 a to 17 d are not opened in the outer peripheral flat portion 14. Therefore, the openings of the recesses 16a to 16d and 17a to 17d are not formed on the stabilizer bush 10 on the vehicle body 40 side. That is, the edge part which forms the recessed parts 16a-16d and 17a-17d is not pressed by the vehicle body 40. FIG. Therefore, it can prevent that the edge part which forms the recessed parts 16a-16d and 17a-17d buckles by the vehicle body 40, and falls. As a result, it is possible to prevent a decrease in the pressing force of the lip 12 or 13 against the shaft portion 21 of the stabilizer bar 20.

  Furthermore, the edge part which forms the recessed parts 16a-16d and 17a-17d is not pressed by the fastening member 30. FIG. Therefore, it is possible to prevent the edge portions forming the recesses 16a to 16d and 17a to 17d from buckling and falling due to the fastening member 30. As a result, it is possible to prevent a decrease in the pressing force of the lip 12 or 13 against the shaft portion 21 of the stabilizer bar 20.

  In the first embodiment, the lips 12 and 13 are formed at both ends in the axial direction, and the recesses 16a to 16d and 17a to 17d are similarly formed at both ends in the axial direction. However, depending on the mode of use, the lips 12 and 13 may be formed only on one of the axial ends. In this case, the recess may be formed only on the radially outer side of the lip formed on one of the axial ends. That is, in this case, the recess is formed only on one of the end portions in the axial direction.

<Second embodiment>
Next, the stabilizer bush 100 of 2nd embodiment is demonstrated with reference to FIGS. FIG. 7 is a view of the stabilizer bush 100 according to the second embodiment as viewed from the radial direction. FIG. 8 is a rear view of FIG. 9 is a cross-sectional view taken along line EE in FIG. 10 is a cross-sectional view taken along the line F-F in FIG. 9. 9 is the same as FIG. 5 used in the first embodiment, and the HH sectional view of FIG. 9 is the same as FIG. 6 used in the first embodiment. is there. In addition, in the stabilizer bush 100 of 2nd embodiment, about the same structure as the stabilizer bush 10 of 1st embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The stabilizer bush 100 according to the second embodiment does not have the recesses 16d and 17d in the stabilizer bush 10 according to the first embodiment. Otherwise, both are the same. Here, the arm portion 22 of the stabilizer bar 20 abuts against one end surface (the right end surface in FIG. 7) of the stabilizer bush 100. And the arm part 22 rock | fluctuates the angle range (theta) set centering | focusing on the axial center of the axial part 21. As shown in FIG. This is because the wheels move up and down with respect to the vehicle body 40. In the angle range θ in which the arm portion 22 of the stabilizer bar 20 can abut against the stabilizer bush 100, no recess is formed in the axial direction. That is, in the angle range θ, the axial direction is filled with the rubber elastic body. In other words, the rubber filling portions 116a and 117a are arranged in the entire range of the angular range θ.

  As described above, by arranging the rubber filling portions 116a and 117a in the entire range of the angle range θ in which the arm portion 22 of the stabilizer bar 20 can come into contact, the stabilizer bush 100 has a shaft from the arm portion 22 in the angle range θ. When the directional force is received, the amount of axial deformation of the stabilizer bush 100 can be reduced. That is, the stabilizer bush 100 can reliably exhibit the function as a stopper with respect to the axial direction of the arm portion 22.

<Third embodiment>
Next, the stabilizer bush 200 of 3rd embodiment is demonstrated with reference to FIG. 11 and FIG. FIG. 11 is a radial cross-sectional view at the axially central portion of the stabilizer bush 200 of the third embodiment. 12 is a cross-sectional view taken along line JJ in FIG. The stabilizer bush 200 of the third embodiment is different in outer peripheral surface shape from the stabilizer bush 10 of the first embodiment. Furthermore, the fastening member 300 is different. About the part which both are common, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  An outer peripheral flat portion 14 and a U-shaped portion 201 are formed on the outer peripheral surface of the stabilizer bush 200. The outer peripheral flat part 14 is a part that contacts the vehicle body 40. The U-shaped portion 201 is formed such that the radial cross-sectional shape is a U-shape, and the U-shaped opening side is a part of the outer peripheral flat portion 14. The U-shaped portion 201 is formed such that the central portion in the axial direction protrudes by being curved in the radial direction with respect to both ends in the axial direction. The entire surface of the U-shaped portion 201 is a portion that is pressed against the fastening member 300.

  And the recessed parts 201a-201f and 202a-202f which open to an outer peripheral side are formed in the radial direction outer side of the lips 12 and 13 among the U-shaped shape parts 201. FIG. These recessed parts 201a-201f and 202a-202f are formed small compared with the recessed parts 16a-16d and 17a-17d of 1st embodiment.

  The fastening member 300 includes a U-shaped portion 301 and a flange portion 302. The U-shaped portion 301 of the fastening member 300 has a shape that follows the U-shaped portion 201 on the outer peripheral surface of the stabilizer bush 200. That is, the U-shaped portion 301 of the fastening member 300 is formed such that the central portion in the axial direction of the axial direction is curved and protrudes in the radial direction with respect to both ends in the axial direction. That is, the U-shaped portion 301 of the fastening member 300 engages with the U-shaped portion 201 on the outer peripheral surface of the stabilizer bush 200 in the axial direction. The flange portions 302 are provided so as to extend outward from both ends of the U-shaped portion 301 and are attached to the vehicle body 40 by bolts (not shown).

  Thus, in the stabilizer bush 200 of the third embodiment, the recesses 201a to 201f and 202a to 202f are covered with the fastening member 300. Therefore, when the edge part which forms recessed part 201a-201f, 202a-202f is pressed by the fastening member 300, there exists a possibility that the said edge part may buckle and fall. However, compared with 1st embodiment, it is made hard to buckle by making the magnitude | size of recessed part 201a-201f, 202a-202f small. In addition, the other effect by the stabilizer bush 10 of 1st embodiment is similarly show | played also in the stabilizer bush 200 of 3rd embodiment.

It is the figure seen from the diameter direction of the state which assembled the stabilizer bush 10 of 1st embodiment to the vehicle. It is AA sectional drawing of FIG. It is the figure seen from the radial direction of the stabilizer bush 10 single-piece | unit of 1st embodiment. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is DD sectional drawing of FIG. It is the figure seen from the radial direction of the stabilizer bush 100 single-piece | unit of 2nd embodiment. FIG. 8 is a rear view of FIG. 7. It is EE sectional drawing of FIG. It is FF sectional drawing of FIG. It is radial direction sectional drawing in the axial direction center part of the stabilizer bush 200 of 3rd embodiment. It is JJ sectional drawing of FIG.

Explanation of symbols

10, 100, 200: Stabilizer bush 11: Inner peripheral part with the same diameter, 12, 13: Lip 14: Flat part on the outer periphery, 15: U-shaped concave part, 16, 17: U-shaped flange parts 16a-16d, 17a- 17d, 201a to 201f, 202a to 202f: recessed portions 16e to 16h, 17e to 17h, 116a, 117a: rubber filling portion 20: stabilizer bar, 21: shaft portion, 22: arm portion 30, 300: fastening member, 31, 301 : U-shaped shape part, 32, 302: Flange part 40: Vehicle body

Claims (6)

A stabilizer bush made of a cylindrical rubber elastic body, holding a stabilizer bar in the through hole, and being fixed to the vehicle body by pressing the outer surface by a fastening member,
A lip projecting radially inward is provided on at least one of the opening ends of the inner peripheral surface,
The stabilizer bush characterized by forming the recessed part opened to the outer peripheral side in the radial direction outer side of the said lip.   The stabilizer bush of Claim 1 provided with the rubber filling part with which the rubber elastic body was filled in the position which is the radial direction outward side of the said lip, and the circumferential direction adjacent to the said recessed part. The stabilizer bar includes a shaft portion that is torsionally deformed and inserted and held in the stabilizer bush, and an arm portion that is bent at an end portion of the shaft portion and contacts the stabilizer bush.
3. The stabilizer bush according to claim 2, wherein the rubber filling portion is disposed in a predetermined angle range in which the arm portion abuts against the stabilizer bush when the shaft center of the shaft portion is the center.   The stabilizer bush according to claim 3, wherein the rubber filling portion is disposed in the entire range of the predetermined angle range.   The stabilizer bush according to any one of claims 1 to 4, wherein the concave portion opens in a portion of the outer peripheral surface excluding the vehicle body side.   The stabilizer bush according to any one of claims 1 to 5, wherein the recess is opened at a position shifted in an axial direction with respect to the fastening member.