JP2012219913A - Strut mount and structure for mounting strut rod to car body side panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a strut mount and a structure for mounting a strut rod to a car body side panel, in which while suppressing manufacturing costs small, it is possible to regulate effectively the excessive displacement of the strut rod to an upper side of the car body side panel with respect to action of a bound load to the strut rod.SOLUTION: The strut mount includes: a tubular body 2 having a tapered portion 2a in which the diameter expands toward one side of a center axial line and an inward flange portion 2b, protruded to an inner circumferential side continuously to a circumferential edge of another side of the center axial line, of the tapered portion 2a; and a tubular body rubber 3 fixed to an outer circumferential surface of the tubular body 2 over all the circumference. On the inside of the body rubber 3, one or more elastic stoppers 4 protruded toward the side of a car body side panel 20 are provided on an outer surface of the inward flange portion 2a of the tubular body 2, and the elastic stopper 4 is set in no contact with a recessed top wall 22 of the car body side panel 20 in the posture of the body rubber 3 fitted to the car body side panel 20.

Description

  The present invention comprises a cylindrical body having a tapered shape and a cylindrical main body rubber fixed to the outer peripheral surface of the cylindrical body over the entire circumference, and a strut rod extending from the wheel side is passed through the cylindrical body. The strut mount used for fitting the main body rubber to the hollow surface of the vehicle body side panel provided with a through hole in the hollow top wall, and the strut rod mounting structure to the vehicle body side panel, In particular, to manufacture a strut mount that can effectively control the excessive displacement of the strut rod in the upward direction relative to the vehicle body side panel when a so-called bounce load is applied to the strut rod. We propose a technology that can

As a strut mount that is disposed between a vehicle body side panel and a strut rod extending from the wheel side and contributes to suppression of transmission of input vibration from the wheel side to the vehicle body side, conventionally described in Patent Document 1 As described above, there has been proposed one that is used for fitting in a vehicle body side panel.
For example, a strut mount 101 shown in FIG. 5 includes a cylindrical body 102 having a tapered shape whose diameter increases toward the lower side of the figure, and a cylindrical rubber elastic body fixed to the outer peripheral surface of the cylindrical body 102 over the entire circumference. 103, and the strut mount 101 is disposed between the vehicle body side and the wheel side, as shown in the drawing, the strut rod 110 extending from the wheel side is passed through the cylindrical body 102. The rubber elastic body 103 is fitted into the recessed surface 121 of the vehicle body side panel 120, and the rigid stopper plate member 130 is attached to the upper end portion 111 of the strut rod 110 protruding upward from the through hole 122 of the vehicle body side panel 120. Can be performed.

  By the way, in such a strut mount 101, the rubber elastic body 103 is provided with an annular groove 104 extending over the entire circumference and recessed on the central axis side on the outer peripheral surface on the lower side of the rubber elastic body 103 in the figure. The function is mainly divided into a main rubber portion 103a that suppresses transmission of input vibration from the wheel side to the vehicle body side, and an elastic stopper portion 103b that restricts the displacement of the strut rod 110 to the upper side of the vehicle body side panel 120. Therefore, in a normal use state of the strut mount 101, the main body rubber 103a sufficiently absorbs the input vibration from the wheel side due to the soft spring characteristic in the vertical direction in the figure. On the other hand, the strut rod 110 When a large bouncing load in the push-up direction is applied from the wheel side, the elastic stopper portion 103b is In contact with the lower surface of the arm 103a, resulting in clogging of the annular groove 104, the strut rods 110 and cylinder body 102, it is possible to restrict the further upward displacement of the side to the vehicle body side panel 120.

JP 2008-128273 A

However, when manufacturing the strut mount 101 as shown in FIG. 5, a mold used for vulcanization molding of the strut mount 101 is simply composed of an upper mold and a lower mold, and the mold is formed in the axial direction of the strut mount 101. In the case of opening, the strut mount 101 formed from the mold is caused by the presence of a protrusion from the inner surface of the mold to form the annular groove 104 on the outer peripheral surface of the rubber elastic body 103. Die cutting becomes difficult.
Therefore, when vulcanizing and molding the conventional strut mount 101, a pair of intermediate dies that open in the horizontal direction are usually provided between the upper and lower dies when the upper and lower dies are opened. There is a problem that it is necessary to use a sulfur molding die, which inevitably increases the equipment cost required for manufacturing.

  The object of the present invention is to solve such problems of the prior art, and the object of the present invention is to reduce the manufacturing cost and prevent the bound load from acting on the strut rod. Another object of the present invention is to provide a strut mount capable of effectively restricting excessive displacement of the strut rod to the upper side of the vehicle body side panel, and a structure for mounting the strut rod to the vehicle body side panel.

A strut mount according to the present invention includes a tapered portion that expands toward one side of the central axis, and an inward flange portion that projects inward from the peripheral edge on the other side of the central axis of the tapered portion. And a cylindrical main body rubber that is fixed to the outer peripheral surface of the cylindrical body over the entire circumference, and a strut rod extending from the wheel side is passed through the cylindrical body and is formed in the top wall of the recess. The main body rubber is fitted into the hollow surface of the vehicle body side panel provided with a through hole, and is used.
One or a plurality of elastic stoppers protruding toward the vehicle body side panel are provided on the outer surface of the inward flange portion of the cylindrical body inside the main rubber, and the elastic stoppers are attached to the main rubber on the vehicle body side panel. In the fitting posture, it is non-contact with the hollow top wall of the vehicle body side panel.
Here, “the fitting posture of the main body rubber to the vehicle body side panel” means that the strut rod penetrates the cylinder body and is connected to the cylinder body, and the main body rubber is fitted to the hollow surface of the vehicle body side panel. Thus, the strut mount is disposed between the wheel side and the vehicle body side, and the weight of the vehicle body acts on the strut mount so that the strut mount is displaced to the wheel side.

  Here, the elastic stopper can be formed separately from the main rubber with an elastic material having the required physical properties, but it is formed by integrally connecting to the main rubber positioned outside the elastic stopper. Is preferred.

Further, the structure for attaching the strut rod to the vehicle body side panel according to the present invention is a structure in which the strut rod is attached to the vehicle body side panel via any of the above-described strut mounts, and the strut rod is attached to the strut mount. A rigid stopper plate member is attached to the upper end portion of the strut rod that protrudes upward from the through hole of the vehicle body side panel, with the body rubber of the strut mount fitted into the hollow surface of the vehicle body side panel. ,
The peripheral portion of the through-hole of the hollow top wall of the vehicle body side panel is deformed to the cylindrical body over the entire circumference, and the peripheral portion is brought close to the elastic stopper provided on the inward flange portion of the cylindrical body. Is.

  In addition, it is preferable that the annular elastic member protruding downward on the outer peripheral edge of the rigid stopper plate member is positioned on the inner peripheral side of the top edge of the vehicle body side panel that protrudes highest upward.

  According to the strut mount of the present invention, on the inner surface of the main body rubber, it protrudes toward the vehicle body side panel side on the outer surface of the inward flange portion of the cylindrical body, and the main body rubber is applied to the vehicle body side panel. In the fitting posture, the elastic stopper which is not in contact with the hollow top wall of the hollow is provided, so that when the elastic stopper is used between the vehicle body side and the wheel side for use, the elastic stopper will be In the state where it does not contact the wall, it is possible to effectively absorb the input vibration from the wheel side based on the soft spring characteristics by the main rubber, and when a large bound load acts on the strut rod, the cylinder The abutment of the elastic stopper backed up by the inward flange part of the body causes a sudden increase in the spring constant under the contact with the hollow top wall of the vehicle body side panel, and the strut rod push-up direction It is possible to effectively regulate the excessive displacement.

  In addition, in this strut mount, the elastic stopper is provided on the outer surface of the inward flange portion of the cylindrical body on the inner side of the main body rubber, so that the outer peripheral surface of the rubber elastic body is on the central axis side as in the prior art. Therefore, the strut mount can be easily manufactured at a low cost using a mold composed of an upper mold and a lower mold.

  Here, when the elastic stopper is configured so as to be integrally continuous with the main rubber located outside thereof, the elastic stopper is vulcanized on the inward flange portion of the cylindrical body simultaneously with the vulcanization molding of the main rubber. Since it can be formed by bonding, an elastic stopper as a separate member from the main rubber is formed separately from the vulcanization molding of the main rubber and fixed to the inward flange portion of the cylinder afterwards. As compared with the case of fixing, the manufacturing process is reduced, and easier manufacturing can be realized.

  In addition, according to the structure for mounting the strut rod to the vehicle body side panel according to the present invention, as described above, the large displacement of the strut rod can be effectively regulated without increasing the manufacturing cost. By deforming the peripheral portion of the through-hole of the hollow top wall of the panel over the entire circumference to the cylinder side and bringing the peripheral portion close to the elastic stopper provided on the inward flange portion of the cylindrical body, the elastic stopper Since the amount of displacement of the strut rod until the hard spring characteristic due to contact with the peripheral portion is exhibited can be reduced, the amount of deformation of the peripheral portion can be appropriately selected, so that the strut Depending on the vehicle on which the mount is disposed, the elastic stopper can exert the function of restricting the displacement of the strut rod.

  In this mounting structure, an annular elastic member projecting downward on the outer peripheral edge of the rigid stopper plate member is positioned on the inner peripheral side of the top edge of the vehicle body side panel that projects highest upward. In this case, at least a part of each of the rigid stopper plate member and the annular elastic member can be disposed so as to enter the peripheral portion of the vehicle body side panel that is deformed to the cylindrical body side. Can be made compact in the vertical direction, and the hood position of the vehicle can be lowered.

1 is a longitudinal sectional view including a central axis showing one embodiment of a strut mount according to the present invention in a disposition posture between a vehicle side and a wheel side. FIG. 7 is an enlarged longitudinal sectional view showing another example of forming the elastic stopper of the strut mount of FIG. 1. FIG. 5 is an enlarged longitudinal sectional view showing a modification of the main part of the strut mount of FIG. 1. It is a longitudinal cross-sectional view similar to FIG. 1 which shows other embodiment. It is a longitudinal cross-sectional view including the central axis which shows the conventional strut mount by the arrangement | positioning attitude | position between the vehicle side and the wheel side.

Embodiments of the present invention will be described below with reference to the drawings.
A strut mount 1 illustrated in FIG. 1 has a tapered portion 2a whose diameter increases toward one side (downward in the figure) of the central axis, and the other side (upper side in the figure) of the central axis of the tapered portion 2a. A rigid cylinder 2 made of metal, for example, having an inward flange portion 2b projecting to the inner circumference side continuously from the peripheral edge of the cylinder, and a main rubber 3 fixed to the outer peripheral surface of the cylinder 2 over the entire circumference. I will.
Here, the outer surface of the main rubber 3 can be formed in a taper shape substantially parallel to the taper portion 2 a that expands toward one side of the central axis of the cylindrical body 2.

  As shown in FIG. 1, the strut mount 1 has an upper side in which the outer surface of the main rubber 3 is provided on the vehicle body side panel 20 while allowing the strut rod 10 extending from the wheel side to pass through the central portion of the cylindrical body 2. The upper end portion 11 of the strut rod 10 that protrudes upward from the through hole 23 provided in the depression top wall 22 of the vehicle body side panel 20 is fitted into the depression surface 21 substantially parallel to the outer surface of the main body rubber 3. By attaching the annular rigid stopper plate member 30, it can be disposed between the vehicle body side and the wheel side.

  When the vehicle with the strut mount 1 is run, most of the vertical input received by the wheels from the road surface is absorbed by a shock absorber (not shown) and a coil spring surrounding the shock absorber. As a suspension device that absorbs the input portion that could not be absorbed by the strut mount 1 mainly by shear deformation of the main rubber 3 and suppresses transmission of input vibration from the wheel side to the vehicle body side. Function.

Here, in the case where a large input in the push-up direction acts on the strut rod 10, in order to suppress excessive displacement of the strut rod 10 with respect to the vehicle body side panel 20, The elastic stopper 4 protruding toward the vehicle body panel 20 is provided on the outer surface of the inward flange portion 2b of the cylindrical body 2.
On the other hand, until the amount of displacement of the strut rod 10 reaches a predetermined magnitude, the elastic stopper 4 is used for the main rubber to the vehicle body side panel 20 shown in the figure so that the strut mount 1 exhibits a soft spring characteristic. In the fitting posture of 3, no contact is made with the hollow top wall 22 of the vehicle body side panel 20.

According to this, when a large bound load is applied such that the amount of displacement of the strut rod 10 exceeds a predetermined size, the elastic stopper 4 provided on the outer surface of the rigid inward flange portion 2b made of metal, for example, Since the abutting top wall 22 of the vehicle body side panel 20 is brought into contact with the back-up of the inward flange portion 2b, a hard spring characteristic is exhibited with respect to further displacement of the strut rod 10 upward. Excessive displacement of the strut rod 10 can be effectively controlled, and at the same time, excessive shear deformation of the main rubber 3 can be prevented.
Moreover, since the strut mount 1, especially the main rubber 3, can be manufactured by vulcanization molding using a mold composed of an upper mold and a lower mold, which is simply opened up and down, the manufacturing cost can be kept low. Can do.

Here, the elastic stopper 4 can be formed in various shapes or the like according to the required spring characteristics when the elastic stopper 4 is in contact with the recess top wall 22.
For example, when the elastic stopper is ring-shaped over the entire circumference in the circumferential direction of the main rubber 3, a shape that protrudes in the same way toward the vehicle body side panel over the entire circumference, or the vehicle body side at one or more circumferential positions. The shape can be particularly large and partially protrude toward the panel side.
Alternatively, only one or a plurality of elastic stoppers can be provided on the inner peripheral side of the main rubber 3 and partially projecting in a required shape.

Here, the elastic stopper 44 shown in FIG. 2A is formed separately from the main body rubber 3 on the outer peripheral side thereof, but the viewpoint that the manufacture of the strut mount 1 is made easier. Therefore, the elastic stopper is preferably formed integrally with the main rubber 3 as shown in FIG.
As shown in FIG. 1, when the elastic stopper 4 is formed integrally with the main body rubber 3, the rubber thickness of the continuous portion between the elastic stopper 4 and the main body rubber 3 is reduced, and the elastic stopper 4 It is preferable to reduce the influence of rubber deformation between the main body rubber 3 and the main body rubber 3.

Moreover, regardless of whether the elastic stopper is formed integrally with the main rubber 3 or as a separate member, the elastic stopper 54 is made of a thermoplastic elastomer as shown in FIG. It can also be used as an elastic material.
According to this, a higher stopper function can be exhibited based on the contact of the elastic stopper 54 having a higher hardness than that of rubber with the hollow top wall 22 of the vehicle body side panel 20.

  Here, in order to change the stopper characteristics by the elastic stopper, as illustrated in FIG. 3, for example, the vehicle body side panel 22 is attached to a portion 2 c of the inward flange portion 2 b of the cylindrical body 2 to which the elastic stopper 4 is fixed. It is also possible to perform plastic working that rises to the side.

1, a thrust bearing 11 having a cylindrical portion 11a protruding downward is disposed on the lower surface side of the inward flange portion 2b of the cylindrical body 2, and the thrust bearing 11 is provided below the thrust bearing 11. The bracket portion 12 is attached so as to surround the cylindrical portion 11a, and the strut rod 10 is inserted into the thrust bearing 11 and the bracket 12, respectively.
By the way, the enlarged diameter end of the bracket 12 on the lower end side in the drawing functions as a spring, in this case, a spring seat of a coil spring, arranged in parallel with the shock absorber.

  Here, the bracket 12 includes a cylindrical portion 12a having an upper end wall in which a hole surrounding the cylindrical portion 11a of the thrust bearing 11 is formed, and having a substantially cylindrical shape with a slightly reduced diameter toward the lower side of the figure. 12a, which is formed continuously with the peripheral edge on the lower end side of the taper 12b, and has a tapered cylindrical portion 12b which expands in the downward direction in the figure, and is substantially inverted with the cross section shown in the figure formed continuously with the peripheral edge on the lower end side of the tapered cylindrical portion 12b. It consists of an L-shaped cylindrical flange portion 12c.

Further, here, the male screw portion 13 having a smaller diameter than the lower portion formed in the upper portion of the strut rod 10 is screwed into the lower female screw member 14 and the lower female screw member. 14, the inward flange portion 2 b of the cylindrical body 2 is sandwiched and fixed between the lower female screw member 14 and the thrust bearing 11, and the male screw portion 13 is screwed onto the upper female screw member 15. The annular rigid stopper plate member 30 is fastened and fixed between the lower female screw member 14 and the upper female screw member 15.
As described above, the strut rod 10 is indirectly attached to the vehicle body side panel 20 via the strut mount 1.

In addition, on the outer peripheral edge of the rigid stopper plate member 30 having a through-hole at the bottom and having a dish-like shape as a whole, the downward displacement of the strut rod 10 relative to the vehicle body side panel 20 is applied to the vehicle body side panel. An annular elastic member 31 that regulates under contact can be provided.
In FIG. 1, the annular elastic member 31 is brought into contact with the outer surface of the recessed top wall 22 of the vehicle body side panel 20 in the illustrated posture in advance, but the annular elastic member is not in contact with the recessed top wall 22. It is also possible.

By the way, the strut mount 61 according to another embodiment shown in FIG. 4 is plastically deformed toward the cylindrical body 62 on the lower side over the entire periphery of the peripheral edge portion 74 of the through hole 73 of the recessed top wall 72 of the vehicle body side panel 70. Due to this, the protruding height of the elastic stopper 64 toward the vehicle body side panel 70 is made lower than that shown in FIG.
In this manner, by changing the deformation amount of the peripheral portion 74 of the vehicle body side panel 70 and the protruding height of the elastic stopper 64, etc., according to various requests for displacement restriction of the strut rod 10, which varies depending on the vehicle, A strut rod 10 can be attached.

  Here, the outer diameter of the annular rigid stopper plate member 80 attached to the strut rod 10 and positioned above the vehicle body side panel 70 is made smaller than that shown in FIG. The annular elastic member 81 provided on the outer peripheral edge of the vehicle body side panel 70 is positioned on the inner peripheral side of the top edge B that protrudes highest upward, and below the rigid stopper plate member 80 and the annular elastic member 81. The vertical dimension of the mounting structure of the strut rod 10 to the vehicle body side panel 70 is determined by inserting the side portion into the peripheral edge portion 74 of the vehicle body side panel 70 that is deformed to the cylindrical body 62 side. Since it can be made smaller than what has been described, the bonnet of a vehicle employing such a mounting structure can be set low, and as a result It can provide reduced like the air resistance while the vehicle is running.

DESCRIPTION OF SYMBOLS 1,61 Strut mount 2,62 Cylindrical body 2a Tapered part 2b Inward flange part 2c Plastic deformation part 3,63 Rubber body 4,44,54,64 Elastic stopper 10 Strut rod 11 Upper end part 12 Bracket 13 Male thread part 14, 15 Female thread member 20, 70 Car body side panel 21 Recessed surface 22, 72 Recessed top wall 23, 73 Through hole 74 Peripheral portion 30, 80 Rigid stopper plate member 31, 81 Annular elastic member B Top edge of vehicle body side panel

Claims (4)

A cylindrical portion having a tapered portion that expands toward one side of the central axis, and an inward flange portion that protrudes inward from the peripheral edge of the other side of the central axis of the tapered portion; and A vehicle body side provided with a cylindrical main body rubber that is fixed to the outer peripheral surface of the cylindrical body over the entire circumference, and a strut rod extending from the wheel side is passed through the cylindrical body and a through hole is provided in the recess top wall. A strut mount provided for use by fitting the main body rubber to the recessed surface of the panel,
One or a plurality of elastic stoppers protruding toward the vehicle body side panel are provided on the outer surface of the inward flange portion of the cylindrical body inside the main rubber, and the elastic stoppers are attached to the main rubber on the vehicle body side panel. A strut mount that fits in a non-contact manner on the top wall of the body panel.   The strut mount according to claim 1, wherein the elastic stopper is integrally connected to a main body rubber outside the elastic stopper. A structure in which a strut rod is attached to a vehicle body side panel via the strut mount according to claim 1, wherein the strut rod is passed through a cylindrical body of the strut mount, and a strut is formed on the hollow surface of the vehicle body side panel. Fit the body rubber of the mount and attach a rigid stopper plate member to the upper end part of the strut rod protruding upward from the through hole of the vehicle body side panel,
The peripheral portion of the through-hole of the hollow top wall of the vehicle body side panel is deformed to the cylindrical body over the entire circumference, and the peripheral portion is brought close to the elastic stopper provided on the inward flange portion of the cylindrical body. Mounting structure of the strut rod to the vehicle body side panel.   An annular elastic member projecting downward on the outer peripheral edge of the rigid stopper plate member is positioned on the inner peripheral side of the top edge of the vehicle body side panel that projects highest upward. The structure for mounting the strut rod to the vehicle body side panel as described.

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