JP6800038B2 - Upper support - Google Patents

Description

The present invention relates to an upper support for vibration-proof connection of a piston rod of a shock absorber constituting a suspension mechanism to a vehicle body.

Conventionally, an upper support for vibration-proof connection between a piston rod of a shock absorber constituting a suspension mechanism and a vehicle body has been known. As shown in Japanese Patent No. 4922975 (Patent Document 1), for example, the upper support includes a base member that is extrapolated and fixed to a bolt portion constituting the upper end portion of the piston rod. , It has a structure in which the rubber part of the main body is fixed to the base member. The main body rubber portion is provided with an outer peripheral surface of the main body rubber portion that contracts upward, and the vehicle body side mounting portion of the vehicle body is placed on the outer peripheral surface of the main body rubber portion, so that the main body rubber portion is based on the vehicle body load. The upper support is interposed between the piston rod and the vehicle body in a compressed state between the member and the vehicle body side mounting portion.

By the way, in the upper support described in Patent Document 1, the base member arranged externally to the bolt portion of the piston rod is sandwiched between the upper end surface of the piston rod and the first nut at the inner peripheral end portion. So, it is fixed to the piston rod.

However, in the structure as in Patent Document 1, since the inner peripheral end portion of the base member is fixed to the piston rod, the inner peripheral end portion of the base member cannot be projected in the axial direction. Therefore, it is difficult to secure the compression spring component of the main body rubber part between the base member and the vehicle body side mounting part in the direction perpendicular to the axis, and it is difficult to set the spring in the direction perpendicular to the axis hard. In some cases, a greater degree of freedom in tuning was required.

Japanese Patent No. 4922975

The present invention has been made in the background of the above circumstances, and the problem to be solved thereof is to provide an upper support having a novel structure capable of obtaining a large degree of freedom in tuning the spring characteristics of the rubber elastic body of the main body. There is.

Hereinafter, aspects of the present invention made to solve such problems will be described. The components adopted in each of the following aspects can be adopted in any combination as much as possible.

That is, in the first aspect of the present invention, a flat plate-shaped inner peripheral end portion extending in the direction perpendicular to the axis is tightened and fixed to the piston rod in a state of being externally inserted to the upper end portion of the piston rod constituting the shock absorber. In addition to being provided with an inner member, the main body rubber elastic body fixed to the inner member is provided with a tapered support surface whose diameter becomes smaller toward the upper side, and the tapered support surface of the main body rubber elastic body is provided with a vehicle body. By mounting the body side mounting portion, the piston rod and the vehicle body are compressed in a state where the rubber elastic body of the main body is compressed between the inner member and the body side mounting portion by the shared supporting load of the vehicle body. In the upper support interposed between the piston rods, the inner member is provided with a fixing member having a tubular portion arranged externally so as to surround the piston rod at a distant position as a separate part. The tubular portion of the fixing member is fixed to the inner peripheral portion of the rubber elastic body of the main body.

According to the upper support having a structure according to the first aspect, the body side mounting portion attached to the outer peripheral portion of the main body rubber elastic body and the cylinder of the fixing member fixed to the inner peripheral portion of the main body rubber elastic body. By arranging the main body rubber elastic body in the direction perpendicular to the axis with the shape portion, a large compression spring component of the main body rubber elastic body can be obtained in the direction perpendicular to the axis. As a result, the inner peripheral end of the inner member is fixed to the piston rod, and it is difficult to obtain a compression spring in the direction perpendicular to the axis of the rubber elastic body of the main body between the inner member and the body side mounting portion. However, the spring characteristics in the direction perpendicular to the axis can be set with a greater degree of freedom, and the desired vibration isolation performance and steering stability of the vehicle can be advantageously realized.

A second aspect of the present invention is the tubular seal portion that rises from the inner member toward the tip end side of the piston rod on the inner peripheral portion of the main body rubber elastic body in the upper support described in the first aspect. Is provided, the tubular seal portion is fixed to the tubular portion of the fixing member, and the tubular portion of the fixing member is attached to the piston rod to and the body side attachment portion. The stopper member constituting the rebound stopper is pressed against the stopper member constituting the rebound stopper via the tubular seal portion of the rubber elastic body of the main body, and the tubular portion and the stopper member are sealed. ..

According to the second aspect, the tubular seal portion is pressed against the stopper member to form the seal, so that foreign matter such as water enters between the tubular portion and the stopper member and adheres to the piston rod or the like. Can be prevented and durability can be improved. Further, since the tubular portion of the fixing member is fixed to the tubular seal portion and the amount of elastic deformation of the tubular seal portion is limited by the tubular portion, the sealing performance due to the elastic deformation of the tubular seal portion. It is possible to realize a highly reliable seal structure by avoiding a decrease in the seal structure.

In the third aspect of the present invention, in the upper support described in the first or second aspect, the fixing member has a bottomed tubular shape, and the peripheral wall portion of the fixing member constitutes the tubular portion. In addition, the bottom wall portion of the fixing member is fixed to the piston rod together with the inner member in a state of being overlapped with the inner member.

According to the third aspect, since the fixing member has a bottomed tubular shape and the bottom wall portion of the fixing member is fixed to the piston rod together with the inner member, the fixing member can be easily attached to the piston rod. it can.

In the fourth aspect of the present invention, in the upper support described in the first or second aspect, the fixing member has a tubular shape, and the lower end portion of the fixing member is formed in the inner member. It is fitted to the inner member and fixed to the inner member, and the portion of the fixing member protruding from the groove portion is the tubular portion.

According to the fourth aspect, since the fixing member is fixed to the inner member in advance, the inner member and the fixing member can be handled integrally, for example, a mold for vulcanization molding of a rubber elastic body of the main body. The work can be easier when setting to. Moreover, the inner member and the fixing member can be easily fixed by fitting the lower end portion of the fixing member into the groove portion of the inner member.

In the fifth aspect of the present invention, in the upper support described in any one of the first to fourth aspects, the outer member extending along the tapered support surface of the main body rubber elastic body is the main body rubber elastic body. The inner member and the tubular portion of the fixing member are elastically connected to the outer member by the rubber elastic body of the main body.

According to the fifth aspect, since the main body rubber elastic body is arranged between the tubular portion of the inner member and the fixing member and the outer member, the influence on the spring characteristics due to the shape and arrangement of the body side mounting portion. Is reduced, and a large compression spring component in the direction perpendicular to the axis of the rubber elastic body of the main body can be stably obtained. Further, in the sixth aspect of the present invention, in the upper support described in any one of the first to fifth aspects, the fixing member is made thinner than the inner member.

According to the present invention, the inner member is provided with a fixing member having a tubular portion arranged in an extrapolated state so as to surround the circumference of the piston rod at a distant position, and the tubular portion of the fixing member is the main body. Since it is fixed to the inner peripheral portion of the rubber elastic body, the main body rubber elastic body is arranged between the body side mounting portion and the tubular portion of the fixing member in the direction perpendicular to the axis. As a result, even if the inner peripheral end of the inner member is fixed to the piston rod, it is easy to obtain a large compression spring component of the rubber elastic body in the direction perpendicular to the axis, so that the spring characteristics in the direction perpendicular to the axis can be improved. It is possible to set with a larger degree of freedom, and it is possible to advantageously realize the desired vibration isolation performance and steering stability of the vehicle.

The perspective view which shows the upper support as the 1st Embodiment of this invention. FIG. 3 is a cross-sectional view of the upper support shown in FIG. The cross-sectional view which shows the upper support shown in FIG. The cross-sectional view which shows the upper support as the 2nd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 show the upper support 10 as the first embodiment of the present invention. The upper support 10 has a structure in which the inner member 12 and the outer member 14 are elastically connected by a main body rubber elastic body 16. In the following description, the vertical direction means, in principle, the vertical direction in FIG.

More specifically, the inner member 12 is a highly rigid member made of metal or the like and has a stepped substantially annular plate shape, and the inner peripheral portion is located above the outer peripheral portion. At the same time, a rod insertion hole 18 penetrating vertically is formed in the central portion in the radial direction. As the inner member 12, a pressed metal fitting, which is a pressed product of a plate metal fitting, is preferably used.

The outer member 14 is a high-rigidity member made of metal or the like, and has a substantially cylindrical shape as a whole, and has a tapered tubular shape that gradually contracts upward to have a smaller diameter. Further, in the outer member 14 of the present embodiment, the upper end portion thereof is curved toward the inner peripheral side and spreads in the direction perpendicular to the axis. As the outer member 14, similarly to the inner member 12, a pressed metal fitting, which is a pressed product of a plate metal fitting, is preferably used.

The outer member 14 is arranged on the inner member 12 so as to be separated from the upper side, and the inner member 12 and the outer member 14 are elastically connected to each other by the main body rubber elastic body 16. The main body rubber elastic body 16 is provided with a tapered tubular elastic connecting portion 20 whose diameter gradually increases upward as a whole, and the lower end portion of the elastic connecting portion 20 having a small diameter is fixed to the inner member 12. At the same time, the upper end portion of the elastic connecting portion 20 having a large diameter is fixed to the outer member 14. The main body rubber elastic body 16 of the present embodiment is formed as an integrally vulcanized molded product including an inner member 12 and an outer member 14.

Further, the surface of the outer peripheral portion of the inner member 12 is covered with the main body rubber elastic body 16, and the cover rubber 22 protruding downward from the lower surface of the outer peripheral portion of the inner member 12 is integrally formed with the main body rubber elastic body 16. Has been done. The cover rubber 22 has a substantially constant cross-sectional shape that narrows in the radial direction downward and extends continuously over the entire circumference, and surrounds the periphery of the piston rod 40, which will be described later, to prevent foreign matter from entering. It is supposed to get. Further, the inner peripheral end portion of the inner member 12 protrudes from the main body rubber elastic body 16 and is exposed from the main body rubber elastic body 16.

Furthermore, the rubber covering the outer peripheral portion of the inner member 12 is integrally connected to the elastic connecting portion 20 at the inner peripheral end portion, and is positioned downward at the outer peripheral portion, so that the main body rubber elastic body On the lower side of the elastic connecting portion 20 in No. 16, a first adjusting groove 24 that opens on the outer peripheral surface and is continuous over the entire circumference is formed. Since the inner member 12 is supported by the vulcanization molding die of the main body rubber elastic body 16 at the time of molding the main body rubber elastic body 16, it is partially exposed from the main body rubber elastic body 16 at a plurality of places. ..

Furthermore, the outer peripheral surface of the outer member 14 is covered with the main body rubber elastic body 16, and the outer member 14 is fixed to the main body rubber elastic body 16 in a buried state. The main body rubber elastic body 16 is provided with a tapered support surface 26 whose diameter gradually decreases toward the upper side, and extends along the outer peripheral surface of the outer member 14. Since the outer member 14 is supported by the vulcanization molding die of the main body rubber elastic body 16 at the time of molding the main body rubber elastic body 16, it is partially exposed from the main body rubber elastic body 16 at a plurality of places. ..

Furthermore, the inner member 12 and the outer member 14 elastically connected by the main body rubber elastic body 16 are arranged at positions separated in the axial direction, and do not overlap in the projection in the direction perpendicular to the axis.

Further, a tubular seal portion 28 is integrally formed at the inner peripheral end portion of the main body rubber elastic body 16. The tubular seal portion 28 has a substantially cylindrical shape extending vertically, is located on the outer periphery of the inner peripheral end of the inner member 12, and is directed from the inner member 12 toward the upper side, which is the tip end side of the piston rod 40 described later. It is provided so that it can stand up. The lower portion of the tubular seal portion 28 is integrally connected to the elastic connecting portion 20, and the upper portion is located away from the elastic connecting portion 20 on the inner peripheral side, so that the elastic connecting portion 20 and the tubular seal portion 28 are sealed. A second groove-shaped adjusting groove 30 that is continuous over the entire circumference is formed so as to open upward in the radial direction with the upper portion of the portion 28.

A fixing member 32 is fixed to the tubular seal portion 28 of the main body rubber elastic body 16. The fixing member 32 is a hard member made of metal or the like and has a substantially bottomed cylindrical shape. The peripheral wall portion is a substantially cylindrical cylindrical portion 34, and the bottom wall portion is formed. A rod insertion hole 36 penetrating vertically is formed in the central portion in the radial direction. The tubular portion 34 of the fixing member 32 has a smaller axial dimension than the tubular seal portion 28 of the rubber elastic body 16 of the main body, and is not exposed from the upper surface with respect to the tubular seal portion 28. , It is fixed in the intermediate portion in the radial direction (thickness direction) of the tubular seal portion 28 in a buried state. The height of the tubular portion 34 protruding upward from the inner member 12 is set above the bottom surface (deepest portion) of the second adjusting groove 30. As the fixing member 32, a pressed metal fitting, which is a pressed product of a plate metal fitting, is preferably used.

The fixing member 32 is arranged in a state where the bottom wall portion is overlapped on the upper surface of the inner member 12, and the tubular portion 34 is vulcanized and adhered to the tubular seal portion 28 of the main body rubber elastic body 16. The tubular portion 34 of the inner member 12 and the fixing member 32 is elastically connected to the outer member 14 by the main body rubber elastic body 16. Further, the tubular portion 34 of the fixing member 32 is arranged at a position where it overlaps with the lower portion of the outer member 14 in the projection in the direction perpendicular to the axis. Further, the bottom wall portion of the fixing member 32 may be non-fixed and overlapped on the upper surface of the inner member 12 and connected by the main body rubber elastic body 16, but is fixed in advance by means such as welding and the main body rubber. The elastic body 16 may be integrally set with the molding die.

In this way, the outer member 14 and the tubular portion 34 of the fixing member 32 are elastically connected by the main body rubber elastic body 16, and the lower portion of the outer member 14 and the tubular portion 34 of the fixing member 32 overlap each other. Have been placed. As a result, the main body rubber elastic body 16 of the present embodiment can easily obtain a compression spring component between the outer member 14 and the tubular portion 34 of the fixing member 32 in the direction perpendicular to the axis. It is possible to set the spring of the main body harder, and a greater degree of freedom in tuning the spring characteristics of the main body rubber elastic body 16 is secured.

As shown in FIG. 3, the upper support 10 having such a structure is interposed between the piston rod 40 of the shock absorber 38 of the vehicle and the vehicle body 42. The piston rod 40 is a bolt portion 46 having a stepped surface 44 on the upper side having a smaller diameter than the lower side and having a thread formed on the outer peripheral surface.

That is, the bolt portion 46 forming the upper end portion of the piston rod 40 is inserted into the rod insertion hole 18 of the inner member 12 and the rod insertion hole 36 of the fixing member 32 in the upper support 10, and the inner member 12 is vertically overlapped. The bottom wall portion of the fixing member 32 is vertically sandwiched between the first nut 48 screwed to the bolt portion 46 and the stepped surface 44 of the piston rod 40. The inner peripheral end of the inner member 12 sandwiched between the first nut 48 and the stepped surface 44 of the piston rod 40 and the inner peripheral end of the bottom wall of the fixing member 32 are both in the direction perpendicular to the axis. In addition to having a flat plate shape that spreads out, each of them protrudes from the main body rubber elastic body 16 and is directly attached to the piston rod 40 without using rubber. Further, the first nut 48 is arranged on the inner peripheral side of the tubular portion 34 of the fixing member 32.

As a result, the inner member 12 and the fixing member 32 are fixed to the bolt portion 46 of the piston rod 40 in an extrapolated state. In the mounted state of the fixing member 32 on the piston rod 40 as described above, the tubular portion 34 of the fixing member 32 is arranged apart from the piston rod 40 on the outer peripheral side and extrapolated so as to surround the piston rod 40. It is arranged in a state. A bearing 49 is attached to the lower surface of the inner member 12 in a state of being externally fitted to the piston rod 40, and supports an upper end portion of a coil spring 50 arranged in an extrapolated state with respect to the shock absorber 38. The spring seat 51 is supported by the inner member 12 and the piston rod 40 via the bearing 49.

Further, the body side mounting portion 52 of the vehicle body 42 is mounted on the tapered support surface 26 of the main body rubber elastic body 16 from above. The body side mounting portion 52 has a tapered shape corresponding to the shape of the tapered support surface 26, and is provided with a through hole 54 penetrating vertically. Then, the body side mounting portion 52 is overlapped with the tapered support surface 26 of the main body rubber elastic body 16 without being fixed, and the bolt portion 46 of the piston rod 40 is inserted from the body side mounting portion 52 in the through hole 54. Also protrudes upward.

Note that FIG. 3 shows a state in which the shared support load of the vehicle body 42 is not input to the upper support 10 interposed between the piston rod 40 and the vehicle body 42, but to the vehicle. In the mounted state, the shared supporting load of the vehicle body 42 is input between the inner member 12 and the outer member 14, so that the rubber elastic body 16 of the main body is elastically compressed and deformed, and the inner member 12 and the outer member 12 are attached. 14 is brought closer in the vertical direction.

Further, a stopper member 56 is attached to the bolt portion 46 of the piston rod 40. The stopper member 56 has a structure in which the stopper rubber 62 is fixed to the flange portion 60 that extends to the outer periphery at the upper end portion of the cup metal fitting 58. The cup metal fitting 58 of the stopper member 56 is preferably formed by a pressed metal fitting which is a pressed product of a plate metal fitting.

Then, in the stopper member 56, the cup fitting 58 is screwed into the bolt portion 46 in a state where the bolt portion 46 of the piston rod 40 is inserted into the rod insertion hole 64 penetrating the bottom wall portion of the cup fitting 58. By being fixed to the piston rod 40 by the nut 66 of the above, the piston rod 40 is attached to the piston rod 40 on the tip side of the inner member 12 and the fixing member 32. The stopper member 56 is a rebound stopper 68 that limits the amount of tensile deformation in the vertical direction of the elastic connecting portion 20 of the main body rubber elastic body 16 by contacting the flange portion 60 with the body side mounting portion 52 via the stopper rubber 62. Is designed to be configured. The bottom wall portion of the cup fitting 58 of the stopper member 56 is overlapped with the upper surface of the first nut 48 and is sandwiched between the first nut 48 and the second nut 66 in the vertical direction. It is positioned.

In the state where the stopper member 56 is fixed to the piston rod 40 in this way, the tubular portion 34 of the fixing member 32 and the stopper member 56 indirectly come into contact with each other via the tubular seal portion 28 of the main body rubber elastic body 16. The upper end of the fixing member 32 and the lower end of the stopper member 56 are sealed. As a result, the piston rod 40 is separated from the outside between the upper and lower portions of the inner member 12 and the bottom wall portion of the stopper member 56. Therefore, it is possible to prevent foreign matter such as water and dust entering through the through hole 54 of the body side mounting portion 52 from adhering to the piston rod 40, and the durability can be improved.

In particular, the tubular seal portion 28 and the stopper member 56 fixed to the fixing member 32 are different from the case where the tubular seal portion 28 alone to which the tubular portion 34 is not fixed is pressed against the stopper member 56. By tightening the second nut 66, the fixing member 32 and the stopper member 56 are sealed with higher reliability. The upper end opening of the tubular portion 34 is arranged diagonally downward on the outer peripheral side with respect to the outer peripheral edge portion of the disk-shaped bottom wall portion of the stopper member 56 with the tubular seal portion 28 interposed therebetween. Here, the facing surface of the upper end opening of the tubular portion 34 extends to the outer periphery in a curved cross-sectional shape, and the facing surface of the outer peripheral edge portion of the bottom wall portion of the stopper member 56 rises upward in a curved cross-sectional shape. ing. As a result, the facing surfaces that sandwich the tubular seal portion 28 have an R-plane shape that is convex to each other, and the concentration of stress and strain in the tubular seal portion 28 is suppressed.

Further, in the upper support 10 having a structure according to the present embodiment, the tubular portion 34 of the fixing member 32 is fixed to the tubular seal portion 28 of the main body rubber elastic body 16, so that the compression spring component in the direction perpendicular to the axis is fixed. Can be obtained largely between the body side mounting portion 52 and the tubular portion 34 of the fixing member 32. As a result, according to the upper support 10, it is possible to set a harder spring in the direction perpendicular to the axis, so that a large degree of freedom in tuning the spring characteristics is secured, and for example, the spring in the direction perpendicular to the axis is hardened. It also makes it easier to achieve better steering stability.

Further, the main body rubber elastic body 16 of the present embodiment is formed between the elastic connecting portion 20 and the tubular sealing portion 28 while the spring in the axial direction is adjusted by the first adjusting groove 24 opening on the outer peripheral surface. The spring in the direction perpendicular to the axis is adjusted by the second adjusting groove 30. Therefore, the spring characteristics of the main body rubber elastic body 16 can be tuned by appropriately adjusting the shape and depth of the first adjusting groove 24 and the second adjusting groove 30.

Further, the fixing member 32 of the present embodiment has a substantially bottomed cylindrical shape, and the inner peripheral end portion of the bottom wall portion is fastened to the piston rod 40 together with the inner member 12 by the first nut 48. Therefore, it is easy to attach the fixing member 32 to the piston rod 40. Moreover, the bottom wall portions of the inner member 12 and the fixing member 32 are overlapped with each other and sandwiched between the stepped surface 44 of the piston rod 40 and the first nut 48, so that the piston rod 40 is held by the first nut 48. The thickness of the member to be fastened to is increased, and the first nut 48 is less likely to loosen.

FIG. 4 shows an upper support 70 as a second embodiment of the present invention. In the following description, the members and parts that are substantially the same as those in the first embodiment are designated by the same reference numerals in the drawings, and the description thereof will be omitted.

More specifically, the upper support 70 of the present embodiment includes a substantially cylindrical fixing member 72. The fixing member 72 has a substantially cylindrical shape extending vertically, and the inner diameter dimension is larger than the inner diameter dimension of the rod insertion hole 18 of the inner member 12. The fixing member 72 is fixed to the inner member 12 by being fitted into the annular groove 74 whose lower end portion opens on the upper surface of the inner member 12. In the present embodiment, the tubular portion 34 of the fixing member 72 is a portion protruding upward from the groove portion 74 of the inner member 12, and the main body rubber elastic body 16 with respect to the tubular portion 34 of the fixing member 72. The tubular seal portion 28 of the above is fixed.

Even in the upper support 70 having a structure according to the present embodiment, the spring characteristics can be freely tuned by facilitating the securing of the compression spring component in the direction perpendicular to the axis, as in the upper support 10 of the first embodiment. It is possible to improve the degree of freedom and improve the durability by more effectively sealing between the inner member 12 and the stopper member (not shown).

Further, in the present embodiment, the inner member 12 and the fixing member 72 are fixed to each other in advance by fitting the lower end portion of the fixing member 72 into the groove portion 74 of the inner member 12. Thereby, for example, when the inner member 12 and the fixing member 72 are set in the molding mold of the main body rubber elastic body 16, the inner member 12 and the fixing member 72 can be integrally handled, and the inner member 12 and the fixing member 72 can be integrally handled. The setting work of is easy. Moreover, since the inner member 12 and the fixing member 72 are fixed in advance, storage and transportation are facilitated. In addition, the inner member 12 and the fixing member 72 can be fixed by a simple means of fitting the lower end portion of the fixing member 72 into the groove portion 74.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited by the specific description thereof. For example, the wrapping allowance between the outer member 14 and the tubular portion 34 of the fixing member 32 which are arranged so as to overlap each other, the depth of the first and second adjusting grooves 24 and 30, and the like are the desired spring characteristics. It can be changed as appropriate according to.

Further, in the above embodiment, the structure in which the inner member 12 and the outer member 14 are elastically connected by the main body rubber elastic body 16 is illustrated, but the outer member 14 is not essential and may be omitted. In this case, the compression spring component in the direction perpendicular to the axis of the main body rubber elastic body 16 can be secured between the body side mounting portion 52 and the tubular portion 34 of the fixing member 32.

Further, in the above embodiment, the structure in which the inner member 12 and the fixing member 32 are fixed to the piston rod 40 by the first nut 48 and the stopper member 56 is fixed to the piston rod 40 by the second nut 66 is exemplified. However, the inner member 12, the fixing member 32, and the stopper member 56 can be fixed to the piston rod 40 by the second nut 66. That is, a spacer that is externally inserted without being screwed to the bolt portion 46 of the piston rod 40 is adopted instead of the first nut 48, and the inner member 12, the fixing member 32, the spacer, and the stopper member 56 are respectively pistons. By screwing the second nut 66 to the bolt portion 46 in a state of being externally inserted into the bolt portion 46 of the rod 40, the inner member 12, the fixing member 32, and the stopper member 56 are connected to the piston rod by the second nut 66. Can be fixed at 40.

10,70: Upper support, 12: Inner member, 14: Outer member, 16: Rubber elastic body of main body, 26: Tapered support surface, 28: Cylindrical seal part, 32,72: Fixing member, 34: Cylindrical part, 38: Shock absorber, 40: Piston rod, 42: Vehicle body, 52: Body side mounting part, 56: Stopper member, 68: Rebound stopper, 74: Groove part

Claims (6)

The inner peripheral end portion having a flat plate shape extending in the direction perpendicular to the axis is provided with an inner member that is fastened and fixed to the piston rod while being externally attached to the upper end portion of the piston rod constituting the shock absorber. The main body rubber elastic body fixed to the member is provided with a tapered support surface whose diameter becomes smaller toward the upper side, and the body side mounting portion of the vehicle body is placed on the tapered support surface of the main body rubber elastic body. In the upper support interposed between the piston rod and the vehicle body in a state where the main body rubber elastic body is compressed between the inner member and the body side mounting portion by the shared supporting load of the vehicle body.
A fixing member having a tubular portion arranged in an extrapolated state so as to surround the periphery of the piston rod at a distant position is provided as a separate component on the inner member, and the tubular portion of the fixing member is provided. An upper support characterized in that it is fixed to the inner peripheral portion of the main body rubber elastic body. The inner peripheral portion of the rubber elastic body of the main body is provided with a tubular seal portion that rises from the inner member toward the tip end side of the piston rod, and the tubular seal portion is formed on the tubular portion of the fixing member. As well as being stuck
The tubular portion of the fixing member is attached to the piston rod, and the tubular seal portion of the rubber elastic body of the main body is attached to the stopper member which constitutes the rebound stopper by contact with the body side attachment portion. The upper support according to claim 1, wherein the upper support is pressed through and sealed between the tubular portion and the stopper member. The fixing member has a bottomed tubular shape, the tubular portion is formed by the peripheral wall portion of the fixing member, and the bottom wall portion of the fixing member is overlapped with the inner member. The upper support according to claim 1 or 2, which is fixed to the piston rod together with the member. The fixing member has a tubular shape, and the lower end portion of the fixing member is fitted into a groove portion formed in the inner member and fixed to the inner member, and protrudes from the groove portion in the fixing member. The upper support according to claim 1 or 2, wherein the portion is the tubular portion. An outer member extending along the tapered support surface of the main body rubber elastic body is fixed to the main body rubber elastic body, and the inner member and the tubular portion of the fixing member are the outer member and the main body rubber elastic body. The upper support according to any one of claims 1 to 4, which is elastically connected by. The upper support according to any one of claims 1 to 5, wherein the fixing member is thinner than the inner member.

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