JP5792117B2 - Fixed structure - Google Patents

Description

  The present invention is a fixing structure for fixing a first member and a second member using a shaft member, and in particular, a rubber member is interposed in a fixing portion between the first member and the second member. It relates to a fixed structure.

  Conventionally, a fixing structure for fixing a first member and a second member using a shaft member is known, and an example of the fixing structure is described in Patent Document 1 and Patent Document 2. The fixing structure described in Patent Document 1 fixes a wiper frame (first member) to a vehicle body (second member). The wiper frame is a member to which a wiper motor and a wiper arm are attached, and an attachment hole is provided in the wiper frame. A floating rubber (rubber member) is attached to the mounting hole. The floating rubber includes an annular portion and two flange portions extending outward from the annular portion. The two collars are both formed in an annular shape. The annular portion is fitted into the attachment hole of the wiper frame, and the wiper frame is located between the two flange portions. A cylindrical member is inserted into the annular portion.

  On the other hand, a hole is formed in the vehicle body. Furthermore, it has a bolt (shaft member) and a nut for fixing the wiper frame to the vehicle body panel. A washer (pressing member) is attached to the shaft portion of the bolt, and a male screw portion is formed on the tip side of the shaft portion. Then, when the bolt shaft part is inserted into the cylindrical member, the shaft part is inserted into the hole, the nut is attached to the male screw part, and the bolt is tightened, the floating rubber and collar are placed between the washer and the vehicle body. The wiper frame is fixed to the vehicle body in the interposed state. The fixing structure of Patent Document 1 configured as described above suppresses the vibration from being transmitted to the vehicle body by attenuating the vibration component of the wiper frame by the elastic deformation of the floating rubber.

  The fixing structure described in Patent Document 2 includes a pivot shaft that supports the wiper arm, a holder portion that supports the pivot shaft, and an attachment portion (first member) that attaches the holder portion to the vehicle body (second member). Have. An attachment hole is provided in the attachment portion, and a vibration-proof rubber (rubber member) is attached to the attachment hole. Furthermore, the vibration isolating rubber is provided with a cylindrical hole, and a cylindrical member is inserted into the cylindrical hole. Further, a hole is formed in the vehicle body, and a bolt inserted into the hole and the cylindrical member is provided. The bolt has a head portion and a shaft portion, and a male screw portion is formed on the shaft portion. And while attaching a shaft part to a hole and a cylindrical member, attaching a nut (pressing member) to an external thread part, and tightening a volt | bolt, it is comprised so that an attaching part may be fixed to a vehicle body. That is, the mounting portion is fixed to the vehicle body with the vibration-proof rubber and the cylindrical member interposed between the nut and the vehicle body.

  In the fixing structures described in Patent Documents 1 and 2, the vibration of the first member is attenuated by the elastic deformation of the rubber member, thereby suppressing the vibration from being transmitted to the second member.

JP 2001-90779 A JP 2005-153878 A

  However, the fixing structure described in Patent Documents 1 and 2 described above is a rubber member due to a compressive load when the shaft member is tightened when the first member and the second member are fixed using the shaft member. Is elastically deformed, and there is a problem that the rubber member is sandwiched between at least one of the second member and the cylindrical member or between the pressing member and the cylindrical member.

  An object of the present invention is to fix a rubber member between a second member and a cylindrical member or between a pressing member and a cylindrical member when the first member and the second member are fixed using a shaft member. It is an object of the present invention to provide a fixing structure capable of preventing being pinched by at least one of them.

The fixing structure of the present invention includes a first member and a second member that are fixed to each other, an attachment hole provided in the first member, a rubber member attached to the attachment hole, and the rubber member A shaft hole formed in the shaft hole, a cylindrical member attached to the shaft hole, a shaft member inserted into the cylindrical member and fixing the first member and the second member to each other, and The rubber member and the cylindrical member are interposed between the second member and the second member when the first member and the second member are fixed to each other. The rubber member has a circumferential structure around a center line of the cylindrical member at least one of a portion in contact with the second member and a portion in contact with the pressing member. A direction formed along the direction and along the center line A groove having a depth, wherein the rubber member has an inner portion separated by the groove radially outer portion around the centerline, the inner portion is in said radially Located inside the outer portion, the inner portion is extended in a direction along the center line with the bottom side of the groove as a base end side and the opening side of the groove as a free end side. The radial width on the free end side of the inner portion is set to be equal to or larger than the radial width on the proximal end side of the inner portion, and the grooves are the same circle centered on the center line. A plurality of outer peripheral portions are provided with a first wall surface that forms the groove, and the first wall surface is inclined in a direction away from the shaft hole as it approaches the opening side from the bottom side. And connecting the inner part and the outer part between the plurality of grooves. And connection part is provided, wherein the inner portion is easily elastically deformed outward in the radial direction.

In the fixing structure of the present invention, the inner portion includes a second wall surface that forms the groove, the second wall surface is parallel to the center line, and an inner peripheral surface of the shaft hole is connected to the center line. By being parallel, the radial width on the free end side of the inner portion is set to be the same as the radial width on the proximal end side of the inner portion.

In the fixing structure of the present invention, the second wall surface is inclined with respect to the center line, and an inner peripheral surface of the shaft hole is parallel to the center line, whereby the free end side of the inner side portion The width in the radial direction is set larger than the width in the radial direction on the base end side of the inner portion.

According to the onset Ming fixed structure, by inserting the shaft member into the cylindrical member, and the pressing member and a state where the rubber member is interposed between the second member, the first member and the second member When a compressive load in the direction along the center line is applied to the rubber member, the inner portion elastically deforms toward the outer portion in the radial direction of the center line. Accordingly, it is possible to prevent the inner portion from being sandwiched between at least one of the first member and the pressing member or the second member and the cylindrical member.

According to the onset Ming fixing structure, since the inner portion and the outer portion are connected by connecting portions, it tends inner portion is elastically deformed toward the outer portion.

According to the onset Ming fixed structure, that the inner part is elastically deformed toward the shaft hole can be avoided more reliably.

According to the onset Ming fixed structure, that the inner part is elastically deformed toward the shaft hole can be more reliably avoided.

It is 1st Embodiment of the fixing structure of this invention, and is front sectional drawing which shows the state before tightening a volt | bolt. It is a bottom view of the mount rubber used for 1st Embodiment of the fixing structure of this invention. FIG. 2 is a front cross-sectional view showing a state where tightening of bolts is completed in the first embodiment shown in FIG. 1. It is front sectional drawing which shows 2nd Embodiment of the fixing structure of this invention.

  The fixing structure of the present invention can be used for a vehicle, for example, and specifically, can be used when a bracket to which an electric motor is attached is fixed to a vehicle body. Hereinafter, embodiments of a fixing structure of the present invention will be described in detail with reference to the drawings.

(First embodiment)
A first embodiment of the fixing structure of the present invention is shown in FIGS. A fixing structure 10 shown in FIGS. 1 to 3 is an example of fixing a vehicle wiper device (not shown) to a vehicle body panel 11. The wiper device includes a wiper arm (not shown) that wipes the glass of the vehicle, an electric motor (not shown) that operates the wiper arm, and a bracket 12 to which the electric motor is attached. The bracket 12 is a plate-like member made of a metal material. The bracket 12 is provided with an attachment hole 12a penetrating in the thickness direction. The vehicle body panel 11 is provided with a hole 11a penetrating in the thickness direction. The inner diameter of the hole 11a is smaller than the inner diameter of the mounting hole 12a.

  A mount rubber 13 is attached to the attachment hole 12 a of the bracket 12. The mount rubber 13 is provided in order to suppress vibration from being transmitted between the bracket 12 and the vehicle body panel 11. The mount rubber 13 is an annular body integrally formed of a rubber material. A shaft hole 13 a is formed through the mount rubber 13. The shaft hole 13 a is formed around the center line A, and the inner diameter of the shaft hole 13 a is configured to be constant in the direction along the center line A. An annular groove 13b is formed on the outer peripheral surface of the mount rubber 13 over the entire circumference. A portion of the bracket 12 that forms the mounting hole 12 a is fitted into the annular groove 13 b of the mount rubber 13, and the mount rubber 13 is fixed to the bracket 12.

  A cylindrical collar 14 is inserted into the shaft hole 13 a of the mount rubber 13. The collar 14 is made of a metal material, and the collar 14 is an element that regulates the tightening amount of a bolt described later. When the load in the direction along the center line A of the collar 14 is not applied to the mount rubber 13, that is, when there is no load, the length of the mount rubber 13 in the direction along the center line A is , Having a value exceeding the length of the collar 14 in the direction along the center line A.

  The fixing structure 10 includes a bolt 15 that fixes the bracket 12 to the vehicle body panel 11. The bolt 15 has a shaft portion 15a and a head portion 15b formed at one end of the shaft portion 15a, and a male screw portion 15c is formed on the outer peripheral surface of the shaft portion 15a. The shaft 15a is inserted into the collar 14 and the hole 11a so that the mount rubber 13 is positioned between the head 15b and the vehicle body panel 11 in the direction along the center line A. . An annular washer 16 made of a metal material is attached to the shaft portion 15a. The washer 16 is a physically separate member from the bolt 15, and the washer 16 is located between the collar 14 and the head 15 b in the direction along the center line A. The outer diameter of the washer 16 is larger than the outer diameter of the collar 14, and the inner diameter of the washer 16 is smaller than the outer diameter of the collar. 1 and 3, examples in which the outer diameter of the washer 16 is the same as the outer diameter of the mount rubber 13 are shown.

  Further, a nut 17 is attached to the male screw portion 15c. The nut 17 is made of a metal material, and an internal thread portion 17 a is formed on the inner peripheral surface of the nut 17. The nut 17 may be fixed to the vehicle body panel 11 by welding, or may not be fixed to the vehicle body panel 11 by welding. Then, by rotating and tightening the bolt 15, the bracket 12 is fixed to the vehicle body panel 11 as shown in FIG. 3 with the mount rubber 13 and the collar 14 interposed between the washer 16 and the vehicle body panel 11. Yes.

  Thus, in a state where the bracket 12 is fixed to the vehicle body panel 11, the mount rubber 13 is in contact with the vehicle body panel 11 at one end in the direction along the center line A, and extends along the center line A. The other end in the direction is in contact with the washer 16. A groove 18 along the circumferential direction centered on the center line A is formed in at least one of the contact portion between the mount rubber 13 and the vehicle body panel 11 or the contact portion between the mount rubber 13 and the washer 16. ing. In the first embodiment, grooves 18 are formed in both the contact portion between the mount rubber 13 and the vehicle body panel 11 and the contact portion between the mount rubber 13 and the washer 16. That is, in the direction along the center line A, the grooves 18 are disposed on both sides of the annular groove 13b. The groove 18 has a depth in the direction along the center line A.

  As shown in FIG. 1, the mount rubber 13 has a vertically symmetrical shape with the annular groove 13b as the center. Therefore, for convenience, the structure of the groove 18 formed in the contact portion between the mount rubber 13 and the vehicle body panel 11 will be specifically described. A plurality of grooves 18 are arranged on the same circumference so as to surround the center line A. As shown in FIG. 1, in the cross section including the center line A, the groove 18 is formed in a wedge shape having two wall surfaces 18 a and 18 b. Thus, by forming the groove 18 in the mount rubber 13, the mount rubber 13 is formed with an inner portion 13c and an outer portion 13d separated by the groove 18 in the radial direction centered on the center line A. ing. In the radial direction centering on the center line A, the inner side portion 13c is located inside the outer side portion 13d. Further, the inner portion 13c has a portion corresponding to the bottom side 18e of the groove 18 as a base end side 13f and a portion corresponding to the opening side 18f of the groove 18 as a free end side 13g in a direction along the center line A. It has been extended. Here, the opening side 18f of the groove 18 means the portion of the groove 18 that is closest to the vehicle body panel 11, and the bottom side 18e of the groove 18 is the portion of the groove 18 that is closest to the annular groove 13b. Means.

  Further, as shown in FIG. 2, each of the grooves 18 has an arc shape, and a connecting portion 13 e is provided between the grooves 18 in the circumferential direction centering on the center line A. The connecting part 13e connects the inner part 13c and the outer part 13d. In the circumferential direction centering on the center line A, the length of the groove 18, the length of the connecting portion 13e, the number of the grooves 18 and the like can be arbitrarily set.

  That is, in the circumferential direction centering on the center line A, the plurality of grooves 18 are intermittently arranged with the connection portion 13e therebetween. In addition, of the wall surfaces 18 a and 18 b, the wall surface 18 a located inside in the radial direction with the center line A as the center is parallel to the center line A. On the other hand, the wall surface 18b is inclined so as to intersect the center line A. Specifically, the wall surface 18 b is inclined in a direction away from the center line A as it approaches the vehicle body panel 11.

  As described above, the inner diameter of the shaft hole 13a is constant in the direction along the center line A, and the wall surface 18a is parallel to the center line A. For this reason, the inner portion 13c has a constant radial width R1 centered on the center line A in the direction along the center line A. That is, the width R1 on the free end side 13g of the inner portion 13c and the width R1 on the proximal end side 13f of the inner portion 13c are the same.

  As described above, the mount rubber 13 is formed with a plurality of grooves 18 so that the strength in the radial direction centered on the center line A is weakened. More specifically, the inner portion 13 c is easily elastically deformed toward the outer side, that is, toward the groove 18 in the radial direction centered on the center line A. A groove 18 is also provided at a contact portion between the mount rubber 13 and the washer 16. That is, the inner part 13c and the outer part 13d are provided in the radial direction centering on the center line A. The shape and structure of the groove 18 provided in the contact portion between the mount rubber 13 and the washer 16 and the shape and structure of the inner portion 13c and the outer portion 13d are provided in the contact portion between the mount rubber 13 and the vehicle body panel 11. The shape and structure of the groove 18, the inner portion 13c, and the outer portion 13d are vertically symmetrical, and in the above description, “body panel 11” may be read as “washer 16”.

  Next, an operation (process) for fixing the bracket 12 to the vehicle body panel 11 using the bolts 15 will be described. First, before fixing the bracket 12 to the vehicle body panel 11, the collar 14 is inserted into the shaft hole 13 a of the mount rubber 13. The collar 14 and the hole 11a of the vehicle body panel 11 are arranged coaxially, the shaft portion 15a of the bolt 15 is inserted into the collar 14, the shaft portion 15a is inserted into the hole 11a, and the bolt 15 is rotated. Then, the bolt 15 is tightened by screwing the male screw portion 15 c into the nut 17.

  Here, the length of the collar 14 is shorter than the length of the mount rubber 13 when a compressive load in the direction along the center line A is not acting on the mount rubber 13. This is a configuration for elastically deforming the mount rubber 13 when the bolt 15 is tightened, so that the mount rubber 13 is reliably brought into contact with both the washer 16 and the vehicle body panel 11. Therefore, both ends of the mount rubber 13 in the direction along the center line A are in contact with the vehicle body panel 11 and the washer 16 before the mount rubber 13 is elastically deformed.

  On the other hand, one end of the collar 14 contacts the washer 16 in the direction along the center line A, but the other end of the collar 14 does not contact the vehicle body panel 11 in the direction along the center line A. When the bolt 15 is tightened and the shaft portion 15 a moves in the direction along the center line A, the mount rubber 13 is sandwiched between the washer 16 and the vehicle body panel 11. Then, when one end of the collar 14 comes into contact with the washer 16 in the direction along the center line A and the other end of the collar 14 comes into contact with the vehicle body panel 11, the tightening of the bolt 15 is completed, and the bracket 12 is attached to the vehicle body panel 11. Fixed to.

  In the process of tightening the bolt 15 as described above, a compressive load in the direction along the center line A is applied to the mount rubber 13 and the mount rubber 13 is elastically deformed. Since the length of the mount rubber 13 is longer than the length of the collar 14, the inner peripheral portion of the mount rubber 13 may be sandwiched between the collar 14 and the vehicle body panel 11. However, in the first embodiment, the inner portion 13c of the mount rubber 13 is easily elastically deformed outward in the radial direction about the center line A.

  For this reason, the inner portion 13c is sandwiched between the collar 14 and the vehicle body panel 11, that is, biting can be prevented, and the assembled state of the mount rubber 13 can be stabilized. Therefore, insufficient tightening amount of the bolt 15, insufficient tightening torque of the bolt 15, loosening of the bolt 15, and the like can be avoided. Even when the bolt 15 is tightened in a state where the collar 14 and the washer 16 are not in contact with each other, the inner portion 13c provided in the portion in contact with the washer 16 is radially outward in accordance with the same principle as described above. Elastically deforms toward. Therefore, the inner portion 13c can be prevented from being sandwiched between the collar 14 and the washer 16. Moreover, since the inner side part 13c and the outer side part 13d are connected by the connection part 13e, it can avoid reliably that the inner side part 13c elastically deforms to the axial hole 13a side.

  Further, by providing the mount rubber 13 with a groove 18 and specifying the shape and structure of the groove 18 and the inner portion 13c, the inner portion 13c of the mount rubber 13 is between the collar 14 and the vehicle body panel 11 or between the collar 14 and the washer. 16 can be prevented from being caught between at least one of them. Therefore, in order to prevent the mount rubber 13 from being sandwiched, it is not necessary to newly provide a dedicated component, and there is no need to attach a new component. Furthermore, since the groove 18 is formed in the mount rubber 13 so that the inner portion 13c is easily elastically deformed, the rubber material can be reduced. Therefore, the manufacturing cost of the mount rubber 13 can be reduced.

  Thus, in a state where the bracket 12 is fixed to the vehicle body panel 11 using the bolts 15, the wiper arm swings by the drive of the electric motor. Further, the vibration generated by the driving of the electric motor is attenuated by elastic deformation of the mount rubber 13, so that the vibration can be suppressed from being transmitted to the vehicle body panel 11. Further, the mount rubber 13 has an outer portion 13d, and the outer portion 13d is in close contact with the vehicle body panel 11 and the washer 16, so that a contact area is secured, and the mount rubber 13 and the mount rubber 13 are arranged in a plane perpendicular to the center line A. Further, it is possible to suppress the occurrence of slipping at the contact portion between the vehicle body panel 11 and the washer 16. Furthermore, the presence of the outer portion 13d ensures the strength of the mount rubber 13 in the direction along the center line A and the direction along the plane intersecting the center line A, and maintains the function of damping the vibration. it can.

(Second Embodiment)
Next, 2nd Embodiment of the fixing structure 10 in this invention is described based on FIG. The second embodiment of the fixing structure 10 differs from the fixing structure 10 of the first embodiment in the shape of the groove 18, the shape of the inner portion 13c, and the width R1. The two wall surfaces 18c and 18d forming the groove 18 are both inclined with respect to the center line A. Specifically, the wall surface 18 c constitutes the inner wall surface of the groove 18, and the wall surface 18 d constitutes the outer wall surface of the groove 18. Further, the wall surfaces 18 c and 18 d have a tapered shape that is inclined in a direction away from the center line A as it approaches the vehicle body panel 11.

  The acute angle formed by the wall surface 18c and the center line A is the same as the acute angle formed by the wall surface 18d and the center line A. That is, the wall surface 18c and the wall surface 18d are parallel. The radial width R1 of the inner portion 13c becomes longer as the vehicle body panel 11 is approached. That is, the width R1 on the free end side 13g of the inner portion 13c is larger than the width R1 on the proximal end side 13f of the inner portion 13c. In the second embodiment of the fixing structure 10, other structures, shapes, dimensions, and the like are the same as those of the first embodiment of the fixing structure 10.

  The second embodiment of the fixing structure 10 having the above configuration can secure the characteristic that the inner portion 13 c is elastically deformed toward the groove 18 when a compressive load is applied to the mount rubber 13 in the process of tightening the bolt 15. it can. Therefore, as in the first embodiment of the fixing structure 10, it is possible to prevent the inner portion 13 c of the mount rubber 13 from being sandwiched between the collar 14 and the vehicle body panel 11. Further, in the second embodiment of the fixing structure 10, even when the bolt 15 is tightened in a state where the collar 14 and the washer 16 are not in contact with each other, the inner portion 13 c is elastic toward the groove 18 by the same action as described above. Deform. Therefore, the second embodiment of the fixing structure 10 can prevent the inner portion 13 c from being sandwiched between the collar 14 and the washer 16. In the second embodiment of the fixing structure 10, other functions and effects are the same as those of the first embodiment of the fixing structure 10.

  Although not shown in FIG. 4, a portion corresponding to the inner portion 13 c of the inner peripheral surface of the shaft hole 13 a may be inclined with respect to the center line A. That is, among the inner diameters of the shaft hole 13a, the inner diameter on the opening side 18f is set to be larger than the inner diameters of the other portions. Even in this configuration, if the acute angle formed by the center line A and the wall surface 18c is larger than the angle formed by the center line A and the inner peripheral surface of the shaft hole 13a, the inner portion 13c is formed in the groove 18. The width R1 of the opening 18f is larger than the width R1 of the bottom 18e of the groove 18.

  Here, the correspondence relationship between the configuration described in the first embodiment and the second embodiment of the fixing structure 10 and the configuration of the present invention will be described. The bracket 12 corresponds to the first member in the present invention. The panel 11 corresponds to the second member of the present invention, the mounting hole 12a corresponds to the mounting hole of the present invention, the mount rubber 13 corresponds to the rubber member of the present invention, and the collar 14 corresponds to the cylinder of the present invention. The shaft hole 13a corresponds to the shaft hole of the present invention, the bolt 15 corresponds to the shaft member of the present invention, the washer 16 corresponds to the pressing member of the present invention, and the wall surface 18a It corresponds to the wall surface of the invention.

  It goes without saying that the fixing structure of the present invention is not limited to the first embodiment and the second embodiment, and can be variously changed without departing from the gist thereof. For example, a configuration in which the nut is not fixed to the vehicle body panel by welding may be used. Furthermore, in the groove shape of the fixed structure of the present invention, the annular groove may be double or more. The annular groove may be oval or corrugated. With this configuration, the optimum shape of the fixed structure can be set. Furthermore, in the fixing structure of the present invention, the second member itself is provided with an internal thread portion, and the internal thread portion of the internal thread portion is screwed into the internal thread portion, that is, the first structure without using a nut. A fixing structure for fixing the member and the second member is included. In the fixing structure of the present invention, at least one of the both ends of the mount rubber in the direction along the center line is provided with a groove, an inner portion, an outer portion, etc., and the inner portion is directed radially toward the outer portion. It only needs to be easily elastically deformed. Furthermore, in the fixing structure of the present invention, the bolt head is in contact with the vehicle body panel, while a nut is attached to the male screw portion of the bolt via a washer, and the washer is in contact with the mount rubber and the cylindrical member. Including the reverse of the insertion direction of the shaft part.

  Further, the fixing structure of the present invention has a structure in which the bracket and the vehicle body panel are fixed by using a bolt in which the washer is formed integrally with the head without the washer shown in FIGS. Including. In this structure, the washer formed integrally with the head corresponds to the pressing member of the present invention. The fixing structure of the present invention includes a structure in which male screws are formed at both ends of the bolt, nuts are attached to the male screw portions at both ends, and the bracket and the vehicle body panel are fixed. Furthermore, the fixing structure of the present invention is a planting bolt in which the bolt is fixed to the vehicle body. Includes a structure that fixes the vehicle body. In the fixing structure using the implantation bolt, the implantation bolt corresponds to the shaft member of the present invention. Furthermore, since the fixing structure of the present invention fixes the first member and the second member by combining bolts, nuts and the like, it can also be called a fastening structure.

  Furthermore, when the shaft member in the fixing structure of the present invention fixes the first member and the second member to each other, the pressing member is pushed toward the second member, and the pressing member, the second member, It is an element which gives the compressive load of the direction along a centerline to the rubber member interposed between these. The shaft member includes a bolt, a screw, a screw and the like. Further, in the fixing structure of the present invention, the electric motor fixed to the bracket is not limited to the one that operates the wiper arm, the electric motor that operates the panel that opens and closes the opening provided in the roof of the vehicle, and the door glass of the vehicle. An electric motor that raises and lowers the vehicle, an electric motor that operates a slide door that opens and closes an opening provided in a side portion of the vehicle, an electric motor for electric power steering, and the like may be used. Furthermore, the parts attached to the bracket are not limited to electric motors, and may be solenoids, pulleys, drums, gears, and the like.

DESCRIPTION OF SYMBOLS 10 Fixing structure 11 Body panel 11a Hole 12 Bracket 12a Mounting hole 13 Mount rubber 13a Shaft hole 13b Annular groove 13c Inner part 13d Outer part 13e Base part 13g Free end side 14 Collar 15 Bolt 15a Shaft part 15b Head part 15c Male thread portion 16 Washer 17 Nut 17a Female thread portion 18 Grooves 18a, 18b, 18c, 18d Wall surface 18e Bottom side 18f Opening side A Center line R1 Width

Claims (3)

A first member and a second member fixed to each other; an attachment hole provided in the first member; a rubber member attached to the attachment hole; and a shaft hole formed in the rubber member; A cylindrical member attached to the shaft hole, a shaft member that is inserted into the cylindrical member and that fixes the first member and the second member to each other, and the shaft member. And a fixing structure having a pressing member in which the rubber member and the cylindrical member are interposed between the first member and the second member when the first member and the second member are fixed to each other. Because
The rubber member is formed along at least one of a portion in contact with the second member and a portion in contact with the pressing member along a circumferential direction around a center line of the cylindrical member, and the center. Having a groove with a depth in the direction along the line;
The rubber member has an inner part and an outer part separated by the groove in a radial direction centered on the center line,
The inner portion is located inward of the outer portion in the radial direction;
The inner portion is extended in a direction along the center line with the bottom side of the groove as a base end side and the opening side of the groove as a free end side,
The radial width on the free end side of the inner part is set to be equal to or greater than the radial width on the proximal side of the inner part ,
A plurality of the grooves are provided on the same circumference around the center line,
The outer portion includes a first wall surface that forms the groove,
The first wall surface is inclined in a direction away from the shaft hole as it approaches the opening side from the bottom side,
A connecting portion that connects the inner portion and the outer portion is provided between the plurality of grooves, and the inner portion is easily elastically deformed outward in the radial direction. Fixed structure. The fixing structure according to claim 1, wherein the inner portion includes a second wall surface that forms the groove,
The second wall surface is parallel to the center line, and the inner peripheral surface of the shaft hole is parallel to the center line, so that the radial width on the free end side of the inner portion is The fixing structure is characterized by being set to have the same width in the radial direction on the base end side of the inner part . In fixing structure according to claim 1 Symbol placement, the second wall, Ri Contact inclined relative to the center line, by the inner peripheral surface of the shaft hole is parallel to said center line, said inner portion The fixing structure, wherein a width in the radial direction on the free end side is set larger than a width in the radial direction on the base end side of the inner portion.

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