JP5847467B2 - Vibration prevention device for automotive opening / closing body - Google Patents

Description

  The present invention relates to a vibration preventing device for an automotive opening / closing body for preventing vibration when the opening / closing body such as an automobile door is closed, for example.

  For example, a back door for opening and closing a rear luggage compartment is attached to an automobile such as a hatchback, a wagon, or a van. Such a back door is configured such that its peripheral edge abuts on the peripheral edge of the opening of the luggage compartment via a rubber-like stopper or the like and closes the opening. However, there are cases where the opening / closing body resonates due to vibrations during traveling of the vehicle or during idling, resulting in unpleasant noise or discomfort. Various structures have been proposed to suppress such unpleasant sounds.

  For example, Patent Document 1 below describes a fluid-filled torque stopper that is connected between an engine and a vehicle body and suppresses vibration of the engine. The torque stopper is configured by joining a pair of halves via a partition wall, a cylinder having a fluid chamber and an air chamber, a piston rod inserted into the cylinder and having an end inserted outside the cylinder, The piston rod is fixed to the piston rod, and is disposed in the fluid chamber and includes a piston having an orifice. Further, one end of the cylinder is connected to the vehicle body side via a connecting portion, and an end portion of a piston rod inserted outside the cylinder is connected to the engine side via the connecting portion. When the engine vibrates, the piston disposed in the fluid chamber of the cylinder slides, and the vibration of the engine is attenuated by the resistance when the fluid passes through the orifice of the piston.

JP-A-62-106140

  In the case of the torque stopper described in Patent Document 1, the piston and the partition in the cylinder are separated from the distance between the lid that closes the opening on the other end side (piston rod insertion side) of the cylinder and the connecting portion on the engine side. Therefore, the movement of the piston is restricted by the connecting portion on the engine side coming into contact with the cylinder lid. Therefore, there is a possibility that the cylinder lid may be deformed or damaged by an excessive load or a repeated load.

  Accordingly, an object of the present invention is to provide a vibration preventing device for an automotive opening / closing body that can effectively suppress vibration of the opening / closing body and can prevent deformation and damage of a cylinder.

  In order to achieve the above object, the present invention is arranged between an opening provided in an automobile and an opening / closing body attached to the opening to prevent vibration in a state where the opening / closing body is closed. A piston having a flange-like piston body and a piston rod protruding from at least one surface of the piston body, a first cylinder portion that slidably accommodates the piston body, and one end surface of the first cylinder portion. A first body having a second cylinder portion that is continuously provided in diameter and through which the piston rod is inserted, and is connected to the other end surface of the first cylinder portion of the first body, so that the periphery of the opening or the opening / closing body A cylinder having a second body fixed to one of them, and a cylinder filled with a viscous fluid, and the piston rod projecting from the second cylindrical portion of the first body, and the tip thereof is opened to the opening Part Elastic means for urging to abut against the edge or the other of the opening / closing body, and when the piston moves to the second body side against the elastic means, the piston body is attached to the second body. The present invention provides an anti-vibration device for an automotive opening / closing body, which is configured to be directly or indirectly contacted so as to be restricted from further movement.

  In the vibration preventing device for an automotive opening / closing body according to the present invention, the first flange portion is provided from the peripheral edge of the first tube portion of the first body on the side opposite to the second tube portion, and A second flange portion joined to the first flange portion is provided at a peripheral edge of the two bodies, and when the piston moves to the second body side against the elastic means, the piston body moves to the second flange. It is preferable to be configured to directly or indirectly contact the part.

  In the automotive vibration preventive device of the present invention, one of the first flange portion and the second flange portion has a larger diameter than the other, and an annular gasket is disposed between the flange portions. In this state, the periphery of the flange portion with the larger diameter is caulked to connect the first body and the second body, and the inner periphery of the gasket is in contact with the outer periphery of the piston. It is preferable that it is extended.

  In the automotive vibration preventing device for an opening / closing body of the present invention, the second flange portion of the second body is in direct or indirect contact with the periphery of the opening or the periphery of the mounting hole provided in the opening / closing body. It is preferable to be configured.

  In the vibration preventing device for an automotive opening / closing body of the present invention, a washer plate that contacts the periphery of the opening or the other of the opening / closing body is provided at the end of the piston rod protruding from the second cylinder portion of the first body. Preferably, the elastic means is a coil spring, one end of which is supported by the washer plate, and the other end is supported by the first flange portion of the first body.

In the vibration preventing device for an automotive opening / closing body of the present invention, a washer plate that contacts the periphery of the opening or the other of the opening / closing body is provided at the end of the piston rod protruding from the second cylinder portion of the first body. The elastic means is a coil spring, one end of which is supported by the washer plate, the other end is supported by the first flange portion of the first body, and the piston body is It is preferable that the washer plate is configured not to contact the second cylindrical portion of the first body when contacting the second body via the gasket.

  In the vibration preventing device for an automotive opening / closing body according to the present invention, the piston rod protrudes from the other end surface of the piston body, and a third cylindrical portion that slidably supports the piston rod includes the second cylinder portion. It is preferable that it is provided on the body.

  The vibration preventing device for an automobile opening / closing body according to the present invention further includes a stopper attached to the second body side of the cylinder and fixing the cylinder to the periphery of the opening or the opening / closing body. The three cylinder portions are extended longer than the piston rod, and a space portion in which the piston rod is not inserted is provided at a tip portion thereof, and the stopper is fixed to the end surface of the third cylinder portion via a fixture. It is preferable that

  In the vibration preventing device for an automotive opening / closing body of the present invention, when the piston main body directly or indirectly contacts the second body, the piston rod protrudes from the other end surface of the piston main body and the fixture. It is preferable that a gap be provided in the case.

  In the automotive opening / closing body vibration preventing apparatus of the present invention, the connecting wall that connects the first tube portion and the second tube portion of the first body protrudes in the axial direction toward the second tube portion. It is preferable to have an inclined shape.

  In the vibration preventing device for an automotive opening / closing body of the present invention, the connecting wall that connects the first tube portion and the second tube portion of the first body is inclined so as to be recessed in the axial direction toward the second tube portion. It is preferable to have the shape.

  The vibration prevention device for an automotive opening / closing body according to the present invention further includes a stopper attached to the second body side of the cylinder and fixing the cylinder to the periphery of the opening or the opening / closing body. The tool has an engaging claw that engages with the peripheral edge of the opening or the back side peripheral edge of the mounting hole provided in the opening and closing body, and a flange portion that engages with the front peripheral edge of the mounting hole. It is preferable that the portion of the two bodies that abuts on the piston main body is configured to abut on the flange portion of the stopper.

  According to the present invention, when the opening / closing body is closed with respect to the opening, the piston rod protruding from the cylinder comes into contact with the periphery of the opening or the opening / closing body, and the piston rod is pushed toward the cylinder against the elastic means. As a result, the opening / closing body is urged in a direction that always opens with respect to the opening provided in the automobile, and the back-and-forth of the opening / closing body in the locked state can be prevented.

  In addition, if the opening / closing body tries to vibrate due to slight vibration during vehicle travel, the vibration damping effect is brought about by the flow resistance of the viscous fluid when the piston body moves in the cylinder, which prevents resonance and uncomfortable in the vehicle interior. The generation of sound can be prevented.

  Further, when the opening / closing body is closed with respect to the opening, the piston rod protruding from the cylinder comes into contact with the periphery of the opening or the opening / closing body, and the piston rod is pushed toward the cylinder against the elastic means, so that the flange-shaped piston Since the main body is in direct or indirect contact with the second body and the movement of the piston is restricted, a large load is not applied to the first body, and deformation of the first body can be prevented. The piston body can be operated reliably.

It is a disassembled perspective view which shows one Embodiment of the vibration prevention apparatus of the opening / closing body for motor vehicles based on this invention. It is a principal part assembly perspective view of the same vibration preventing device. It is a cross-sectional perspective view of the same vibration preventing device. It is sectional drawing of the 1st body of the cylinder which comprises the vibration prevention apparatus. The 2nd body of the cylinder which comprises the vibration prevention apparatus is shown, (a) is the top view, (b) is sectional drawing. The stopper which comprises the vibration prevention apparatus is shown, (a) is the top view, (b) is sectional drawing in the AA arrow line of (a). The cover member which comprises the vibration prevention apparatus is shown, (a) is the sectional drawing, (b) is sectional drawing in the BB arrow line of (a). It is explanatory drawing which shows the use condition of the vibration prevention apparatus, and shows the state in which the piston rod was urged by the elastic means. It is explanatory drawing which shows the use condition of the vibration prevention apparatus, and shows the state which the piston main body moved against the biasing force of the elastic means. It is principal part expansion explanatory drawing of the vibration prevention apparatus. It is a perspective view which shows the opening-closing body and opening part to which the vibration prevention apparatus is applied. It is explanatory drawing which shows other embodiment of the vibration prevention apparatus of the opening / closing body for motor vehicles based on this invention. FIG. 7 is a perspective view of a stopper constituting the vibration preventing apparatus, showing still another embodiment of the vibration preventing apparatus for an automotive opening / closing body according to the present invention. The stopper which comprises the vibration prevention apparatus is shown, (a) is the top view, (b) is sectional drawing in CC arrow of (a). It is principal part expansion explanatory drawing of the vibration prevention apparatus.

  Hereinafter, with reference to FIGS. 1-11, one Embodiment of the vibration prevention apparatus of the opening / closing body for motor vehicles based on this invention is described. The vibration preventing device for an automobile opening / closing body is disposed between an opening 3 provided in a rear luggage compartment of the automobile and an opening / closing body 5 including a hatchback door attached to the opening 3 to close the opening / closing body 5. This is for preventing vibration in a heated state (see FIG. 11). The vibration preventing device for an automobile opening / closing body can be applied not only to a hatchback door at the rear of the vehicle but also to a hinge door, a slide door, or the like on the side of the vehicle.

  As shown in FIG. 1, the vibration preventing device 10 (hereinafter referred to as “vibration preventing device 10”) for an automobile opening / closing body in this embodiment includes a piston 20 having a pair of piston rods 23 and 27 projecting, and a gasket 46. A cylinder 30 that includes a first body 30A and a second body 30B that are coupled to each other via the first body 30B. The cylinder 30 that slidably accommodates the piston 20; a stopper 60 that attaches the cylinder 30 to the opening / closing body 5; A rivet 80 that is a fixing tool that fixes the cylinder 30, a coil spring 55 that is an elastic means for urging one piston rod 23 toward the opening 3 of the automobile, and a cover member 90 that covers the cylinder 30 Is mainly composed of

  As shown in FIGS. 1, 3, and 8, the piston 20 includes a circular flange-shaped piston main body 21, a piston rod 23 protruding from the center of one end surface of the piston main body 21 with a predetermined length, and the piston main body 21. From the center of the other end surface, a piston rod 27 that projects coaxially with the piston rod 23 and shorter than the piston rod 23 is provided. On the outer periphery of the piston body 21, notched orifices 21a and 21a are formed to face each other. Further, seal ring mounting grooves 23a and 27a are formed in the middle of the piston rods 23 and 27 in the axial direction, and seal rings 24 and 28 are mounted thereon, respectively. Further, the distal end portion 25 of the piston rod 23 has a reduced diameter in which the washer plate 50 is mounted, and an E-ring mounting groove 25a is formed on the outer periphery thereof.

  As shown in FIG. 8, the seal rings 24 and 28 in the present embodiment employ so-called Y-rings having a Y-shaped cross section. However, the present invention is not limited to this, and the cross-section has a circular shape. So-called O-rings and other cross-sectional rings may be employed.

  Further, in the present embodiment, the orifice formed in the piston main body 21 in a notch shape is adopted, but the present invention is not limited to this. For example, a hole penetrating the piston main body 21 is provided and this hole is used as an orifice, or between the inner diameter of the second cylindrical portion 32 of the first body 30A of the cylinder 30 described later and the outer diameter of the piston rod 23. It is also possible to provide a gap in this and use this gap as an orifice.

  On the other hand, the first body 30 </ b> A of the cylinder 30 includes a cylindrical first tube portion 31 that slidably accommodates the piston body 21, and one of the first tube portions 31, as shown in FIGS. A second cylinder part 32 that is continuously provided with a reduced diameter from the end surface via a connecting wall 33 and that allows the piston rod 23 to be inserted therethrough, and a first cylinder that is formed in the outer diameter direction from the periphery of the other end of the first cylinder part 31. And a flange portion 35.

  As shown in FIG. 9, the second cylindrical portion 32 has a length that does not contact the washer plate 50 when the piston body 21 slides to the second body 30 </ b> B as much as possible. That is, as shown in FIG. 8, when the movement of the piston body 21 biased by the coil spring 55 comes into contact with the connecting wall 33 of the first body 30A and the movement is restricted, the space between the piston body 21 and the gasket 46 is reduced. The length of the second cylinder part 32 is set so that the distance b between the upper end of the second cylinder part 32 and the lower end of the washer plate 50 is larger than the distance a.

  Also, as shown in FIG. 4, the peripheral edge 35a of the first flange portion 35 has a cylindrical shape extending in the axial direction of the first body 30A before being connected to the second body 30B. Yes. Further, as shown in FIGS. 4 and 8, the connecting wall 33 that connects the first tube portion 31 and the second tube portion 32 has a shape that is inclined so as to protrude in the axial direction toward the second tube portion 32. There is no.

  The second body 30B connected to the other end surface of the first cylinder part 31 of the first body 30A is a bottomed cylindrical third cylinder part 39 that slidably supports the piston rod 27 of the piston 20, and It has a second flange portion 45 that extends in the outer diameter direction from the periphery of the opening of the third cylindrical portion 39 and is formed with a smaller diameter than the inner diameter of the peripheral portion 35 a of the first flange portion 35.

  Between this 2nd flange part 45 and the 1st flange part 35 of the said 1st body 30A, the cyclic | annular gasket 46 which consists of a woven fabric, rubber | gum, etc. is arrange | positioned (refer FIGS. 8-10). The inner diameter dimension of the gasket 46 is smaller than the inner diameter dimension of the first cylindrical portion 31 of the first body 30A.

  As shown in FIGS. 5A and 5B, a through hole 43 is formed at the center of the bottom 41 of the third cylindrical portion 39, and the outer periphery of the through hole 43 is even in the circumferential direction. A plurality of, in this embodiment, three air escape holes 43a are formed at intervals.

  Further, the third cylindrical portion 39 extends longer than the piston rod 27, and a space portion 47 into which the piston rod 27 is not inserted even if the piston rod 27 slides is provided inside the tip portion thereof. (See FIGS. 8 and 9). In this space 47, an engaging portion 80b of a rivet 80, which is a fixture for the cylinder 30 and the stopper 60, is disposed. And even if the piston main body 21 slides to the 2nd body 30B side to the maximum, the piston rod 27 and the engaging part 80b do not collide (refer FIG. 9).

  In a state where the first body 30A and the second body 30B are coupled, one piston rod 23 is slidably supported by the second cylindrical portion 32 of the first body 30A, and is inserted through the opening of the tip. At the same time, the other piston rod 27 is slidably supported by the third cylindrical portion 39 of the second body 30B, so that the piston 20 is supported at both ends (see FIGS. 3, 8, and 9).

  Further, as shown in FIG. 8, the seal ring 24 comes into contact with the inner periphery of the second cylindrical portion 32, the seal ring 28 comes into contact with the inner periphery of the third cylindrical portion 39, and the viscous fluid R is placed inside the cylinder 30. When the piston main body 21 slides in the cylinder 30, a braking force acts on the piston main body 21 due to flow resistance when passing through the orifice 21 a.

  Further, the piston main body 21 is normally urged by the coil spring 55, abuts against the connecting wall 33 of the first body 30A (see FIG. 8), and moves toward the second body 30B against the urging force of the coil spring 55. When it moves, it abuts on the gasket 46 to restrict further movement (see FIG. 9).

  The gasket 46 is joined from the inner periphery of the first cylindrical portion 31 by joining the first flange portion 35 and the second flange portion 45 without using the gasket 46, for example. The body 30A and the second body 30B may be connected, and the piston main body 21 may be brought into direct contact with the second flange portion 45 of the second body 30B to restrict the movement thereof. Further, as described above, when the first flange portion 35 and the second flange portion 45 are caulked without using the gasket 46, the first flange portion 35 and the second flange are sealed in order to seal the gap between them. It is preferable to interpose an adhesive between the portion 45.

  Further, a washer plate 50 that is prevented from coming off by an E-ring 56 is attached to the tip 25 of the piston rod 23. As shown in FIGS. 1 and 2, the washer plate 50 is formed with an insertion hole 51 in the center, and a plurality of claw mounting holes 52 are provided at equal intervals on the outer periphery of the insertion hole 51. Further, a cut-and-raised spring support claw 53 is formed on the outer periphery of the washer plate 50. As shown in FIG. 9, the washer plate 50 is configured not to come into contact with the second cylindrical portion 32 even when the piston main body 21 slides to the second body 30 </ b> B side as much as possible.

  The washer plate 50 is provided with an elastic contact member 57 that elastically contacts the periphery of the opening 3 of the automobile. The elastic contact member 57 is formed of an elastic material such as rubber, and a plurality of mounting claws 58 that are inserted into and engaged with the claw mounting holes 52 of the washer plate 50 project from the back side thereof. In the center of each mounting claw 58, a lightening hole 58a is formed along the axial direction in order to improve moldability and flexibility (see FIGS. 3 and 8).

  The piston 30 is protruded from the front end opening of the second cylindrical portion 32 on the outer periphery of the first body 30A of the cylinder 30 and is urged so as to come into contact with the periphery of the opening 3 of the automobile. A coil spring 55 is disposed. One end of the coil spring 55 is supported by being in contact with the washer plate 50, and a spring support claw 53 of the washer plate 50 is inserted and supported on the inner periphery of the coil spring 55, and the other end is supported by the first. The first flange portion 35 of the body 30A is in contact with and supported. The coil spring 55 arranged in this manner biases the piston rod 23 toward the opening 3 of the automobile via the washer plate 50.

  The stopper 60 fixed to the cylinder 30 via a fixing tool includes a bottomed cylindrical housing cylinder portion 61 that houses the third cylinder portion 39 of the cylinder 30, and a peripheral edge of the distal end opening of the housing cylinder portion 61. And a third flange portion 75 which is formed in the outer diameter direction and engages directly or indirectly with the front peripheral edge of the mounting hole 7 of the opening / closing body 5. The inner diameter of the accommodating cylinder 61 is larger than the outer diameter of the third cylinder 39 of the cylinder 30.

  As shown in FIGS. 6A and 6B, a through hole 65 is formed at the center of the bottom portion 63 of the accommodating cylinder portion 61, and a through hole 64 extends from the bottom portion 63 to the inner surface of the bottom portion 63. Projecting in the axial direction of the through hole 64 and spaced radially from the center of the through hole 64. In this embodiment, a plurality of convex portions 67 extending in a cross shape are formed.

  Then, as shown in FIG. 8, the shaft portion 80 a of the rivet 80 that is a fixing tool is inserted into the through hole 43 of the cylinder 30 and the through hole 65 of the stopper 60, and is disposed in the space portion 47 of the cylinder 30. The engaging portion 80 b engages with the peripheral edge of the through hole 43 and the umbrella-shaped portion 80 c engages with the peripheral edge of the through hole 65 of the stopper 60, so that the stopper 60 is attached to the cylinder 30 via the rivet 80. It is supposed to be fixed. In addition to the rivet 80, various types of fasteners such as bolts, nuts, industrial fasteners, and the like can be used as the fixture, and are not particularly limited.

  Further, in this state, as shown in FIG. 8, the bottom 41 of the cylinder 30 abuts on the convex portion 67, and a gap S <b> 1 is formed between the bottom 63 of the stopper 60 and the bottom 41 of the cylinder 30. The gap S <b> 1 communicates with the space portion 47 of the third cylinder portion 39 through an air escape hole 43 a provided in the through hole 43.

  A plurality of ridges 69 extending in the axial direction from the tip opening to the bottom 63 are provided on the inner circumference of the housing cylinder 61 so as to be spaced apart from each other in the circumferential direction (FIG. 6A). ), (B)). As shown in FIG. 6A, the protrusion 69 in this embodiment has a substantially triangular shape when the accommodation tube portion 61 is viewed from the axial direction, and a plurality of convex portions 67 formed on the bottom portion 63. It is arranged between. Then, as described above, when the stopper 60 is fixed to the cylinder 30 via the rivet 80, the inner periphery of the housing cylinder part 61 of the stopper 60 and the outer periphery of the third cylinder part 39 of the cylinder 30 are A gap S2 is formed between them (see FIG. 8). The gap S2 communicates with the gap S1 between the bottom 63 of the stopper 60 and the bottom 41 of the cylinder 30.

  Further, the opening / closing body 5 is provided in a portion located between the plurality of protrusions 69 on the outer periphery of the accommodating cylinder portion 61 via a U-shaped slit 71 (see FIGS. 1 and 6). A flexible engaging claw 73 is formed to engage with the back side periphery of the mounting hole 7 (see FIG. 10). As shown in FIG. 3 and FIG. 6, the engaging claw 73 is provided at the tip end portion of the tapered portion 73 a that gradually protrudes on the outer peripheral side of the accommodating cylinder portion 61, and engages with the rear side periphery of the mounting hole 7. Engaging stepped portion 73b.

  As shown in FIG. 10, the first flange portion 35 and the second flange portion 45 of the cylinder 30 are the upper surface of the third flange portion 75 in a state where the stopper 60 is fixed to the cylinder 30 by the rivet 80. And a gap S3 is formed between them. The gap S3 communicates with a gap S2 formed between the inner circumference of the accommodation cylinder portion 61 of the stopper 60 and the outer circumference of the third cylinder portion 39 of the cylinder 30.

  In the case of this embodiment, an annular seal member 82 made of a foam material is disposed between the third flange portion 75 of the cylinder 30 and the opening / closing body 5. The seal member 82 is formed to be larger than the outer diameter of the third flange portion 75 of the stopper 60 and larger than the outer diameter of the base end portion 91 of the cover member 90.

  The cover member 90 that covers the cylinder 30 is formed of an elastic material such as rubber, and as shown in FIGS. 1, 3, and 7, an annular base end portion 91 and a bellows-like shape provided continuously to the base end portion 91. The telescopic cylinder part 95 which can be expanded and contracted, and the cyclic | annular front-end | tip cover part 97 extended from the front-end | tip part of this telescopic cylinder part 95 are included.

  As shown in FIG. 7A, an annular groove 92 is formed on the inner periphery of the base end portion 91 on the opening side, and an upper portion of the annular groove 92 has a protruding portion 93 protruding in the inner diameter direction. There is no. Then, by fitting the annular groove 92 to the outer periphery of the third flange portion 75 of the stopper 60, the base end portion 91 of the cover member 90 is attached to the stopper 60, and the protruding portion 93 is in this state. The first flange portion 35 of the cylinder 30 is in close contact with the outer periphery (see FIG. 8).

  Further, as shown in FIG. 7B, a plurality of air escape grooves 93a extending along the axial direction are formed at equal intervals in the circumferential direction on the inner periphery of the protruding portion 93, and the stopper 60 covers the stopper 60. The member 90 is mounted, and the air between the cylinder 30 and the cover member 90 can be discharged to the outside of the cover member 90 in a state where the protruding portion 93 is in close contact with the outer periphery of the first flange portion 35.

  Further, an annular groove 97 a is formed on the inner periphery of the tip cover portion 97 of the cover member 90. By fitting the annular groove 97a to the outer periphery of the elastic contact member 57 attached to the washer plate 50, the tip cover portion 97 of the cover member 90 is attached to the elastic contact member 57 (see FIG. 8). ). In this way, the distal end cover portion 97 is attached to the elastic contact member 57 and the base end portion 91 is attached to the third flange portion 75 of the stopper 60, whereby the cover member 90 causes the first end of the cylinder 30. One body 30A, piston rod 23 and coil spring 55 are covered.

  Next, the function and effect of the vibration preventing apparatus having the above structure will be described.

  First, an assembly operation will be described. The cylinder 30, the piston 20, and the coil spring 55 are assembled as follows, for example. That is, the piston rod 23 is inserted into the second cylinder part 32 of the first body 30A, the piston main body 21 is accommodated in the first cylinder part 31 of the first body 30A, and silicon oil is contained in the first cylinder part 31. An annular gasket 46 (see FIG. 1) is disposed on the back side of the first flange portion 35 of the first body 30A by filling a viscous fluid R such as grease or grease.

  Next, the second flange portion 45 of the second body 30B is disposed on the inner periphery of the peripheral edge portion 35a of the first flange portion 35, the gasket 46 is sandwiched between the flange portions 35, 45, and the piston rod 27 is 2 Inserted into the third cylindrical portion 39 of the body 30B. In this state, the second body 30B is coupled to the first body 30A by caulking the peripheral edge portion 35a of the first flange portion 35 so as to cover the surface side of the second flange portion 45 (see FIG. 3 and FIG. 3). (See FIG. 8). As described above, the gasket 46 is sandwiched between the first flange portion 35 and the second flange portion 45 and caulked, thereby sealing the gap between the flange portions 35 and 45 and sealing the both. Can be improved.

  As described above, as a result of connecting the first body 30A and the second body 30B, the piston rod 23 is slidably supported by the second cylindrical portion 32 of the first body 30A, and the piston rod 27 is supported by the second body 30B. The piston 20 is supported at both ends by being slidably supported by the third cylindrical portion 39 (see FIGS. 3, 8, and 9).

  Moreover, since both the bodies 30A and 30B can be joined using the planar flange portions 35 and 45, the first body 30A and the second body 30B can be easily connected. Furthermore, since the cylinder 30 can be composed of only two members, the first body 30A and the second body 30B, the number of parts can be reduced and the structure can be simplified.

  Next, a coil spring 55, which is an elastic means, is sheathed on the outer periphery of the first body 30 </ b> A of the cylinder 30, and its end is brought into contact with the first flange portion 35. And the front-end | tip part 25 of the piston rod 23 is penetrated to the insertion hole 51 of the washer plate 50, while supporting the washer plate 50 with the step part 25b (refer FIG. 8) of the front-end | tip part 25, E is attached to E ring mounting groove 25a. A ring 56 is attached. As a result, the washer plate 50 is attached to the distal end portion 25 of the piston rod 23 in a state of being prevented from being detached, and the coil spring 55 is interposed between the washer plate 50 and the first flange portion 35 of the cylinder 30 in a contracted state. The piston rod 23 is urged toward the opening 3 side of the automobile through the washer plate 50.

  Thus, in this embodiment, by attaching the highly rigid washer plate 50 to the end of the piston rod 23, one end of the coil spring 55 can be firmly held and the configuration can be simplified.

  Further, since one end of the coil spring 55 is supported by the first flange portion 35 and the other end is supported by the washer plate 50, the outer diameter of the coil spring 55 is sufficiently secured to obtain a high spring force. As a result, the overall length of the coil spring 55 and the cylinder 30 can be shortened, and space saving can be achieved. Furthermore, one end of the coil spring 55 is supported not by the caulking edge portion 35a (see FIG. 10) of the first flange portion 35 but by a flat surface portion with high surface accuracy, so that the coil spring 55 is inclined. Can be suppressed.

  Then, as shown in FIG. 2, each mounting claw 67 a of the elastic contact member 57 is aligned with the plurality of claw mounting holes 52 of the washer plate 50, and the elastic contact member 57 is pushed into each mounting. The elastic contact member 57 is mounted on the surface of the washer plate 50 by engaging the claw 67 a with the claw mounting hole 52.

  The cylinder 30 is attached to the stopper 60 via the third cylindrical portion 39 of the second body 30B. That is, the third cylindrical portion 39 of the cylinder 30 is inserted into the accommodating cylindrical portion 61 of the stopper 60, and the bottom 41 is brought into contact with the convex portion 67 of the bottom 63 of the stopper 60. At this time, as shown in FIGS. 6A and 6B, the tip portions of the plurality of protrusions 69 are disposed close to the outer periphery of the third cylindrical portion 39 of the cylinder 30. The three cylinder portions 39 can be firmly supported without rattling.

  Next, as shown in FIGS. 3 and 8, by inserting and caulking the shaft portion 80a of the rivet 80, which is a fixing tool, into the through hole 43 of the cylinder 30 and the through hole 65 of the stopper 60, respectively, The engaging portion 80 b disposed in the space portion 47 of the cylinder 30 engages with the peripheral edge of the through hole 43, and the umbrella-shaped portion 80 c engages with the peripheral edge of the through hole 65 of the stopper 60. Thus, the stopper 60 is fixed to the cylinder 30.

  Thus, in this embodiment, since the space portion 47 into which the piston rod 27 is not inserted is provided at the distal end portion of the third cylinder portion 39 of the cylinder 30, the rivet 80 is used by utilizing this space portion 47. The cylinder 30 and the stopper 60 can be fixed by using them, and the fixing structure of both can be simplified. Moreover, since both are fixed in the state in which the 3rd cylinder part 39 of the 2nd body 30B of the cylinder 30 was accommodated in the accommodation cylinder part 61 of the fastener 60, space saving can be achieved.

  Thereafter, the cover member 90 is put on the cylinder 30 from the base end portion 91 side, and the annular groove 92 of the base end portion 91 is fitted to the outer periphery of the third flange portion 75 of the stopper 60, and the tip cover portion The cover member 90 is attached to the outer periphery of the first body 30A of the cylinder 30 by fitting the annular groove 97a of 97 to the outer periphery of the elastic contact member 57, and the first body 30A of the cylinder 30 and the piston rod 23 are attached. And the coil spring 55 is covered (refer FIG. 3).

  Further, in the vibration preventing device 10 in this embodiment, the stopper 60 is attached to the attachment hole 7 of the opening / closing body 5. At the time of attachment, an annular seal member 82 is disposed on the surface side of the attachment hole 7 of the opening / closing body 5, and the accommodating cylinder portion 61 of the stopper 60 is inserted in this state. Then, the tapered portion 73a is pressed to the inner periphery of the mounting hole, the engaging claw 73 bends inward, and when the engaging step portion 73b gets over the mounting hole 7, the engaging claw 73 is elastically restored, and the engaging step. The portion 73 b engages with the back side periphery of the mounting hole 7.

  At the same time, the third flange portion 75 of the stopper 60 comes into contact with the seal member 82, and the base end portion 91 of the cover member 90 attached to the outer periphery thereof slightly crushes the outer peripheral edge of the seal member 82. 10 to 10, the third flange portion 75 is indirectly engaged with the front peripheral edge of the mounting hole 7 via the seal member 82. As a result, the periphery of the attachment hole 7 can be held between the engagement claw 73 and the third flange portion 75, and the vibration preventing device 10 can be attached to the attachment hole 7.

  In the above attachment state, the portion protruding from the attachment hole 7 of the cylinder 30 to the front side is covered with the cover member 90, and the base end portion 91 of the cover member 90 is joined to the third flange portion 75 of the stopper 60. It is possible to prevent moisture such as rainwater from entering the cylinder 30 and intrusion of rainwater or the like into the cover member 90.

  In this embodiment, the vibration preventing device 10 is attached to the attachment hole 7 of the opening / closing body 5, but conversely, an attachment hole is formed in the periphery of the opening 3 of the automobile, The vibration preventing device 10 may be attached to the periphery of the opening 3.

  Then, when the opening / closing body 5 is closed after the opening 3 of the automobile shown in FIG. 11 is opened, the tip of the piston rod 23 protruding from the tip of the second cylinder 32 of the cylinder 30 is elastically applied. The piston rod 23 abuts indirectly on the periphery of the opening 3 via the contact member 57, and the piston rod 23 resists the biasing force of the coil spring 55, while contracting the telescopic cylinder portion 95 of the cover member 90, 2 Pushed into the body 30B side.

  Then, the piston rods 23 and 27 are slidably supported by the second cylinder portion 32 and the third cylinder portion 39, respectively, and the flow resistance of the viscous fluid R passing through the orifice 21a is received. The piston main body 21 slides.

  At this time, in this embodiment, the piston rods 23 and 27 protruding from both surfaces of the piston main body 21 are slidably supported by the second cylindrical portion 32 of the first body 30A and the third cylindrical portion 39 of the second body 30B, respectively. In addition, since the piston 20 is supported at both ends, the tilt of the piston main body 21 can be prevented, and the inside of the first cylindrical portion 31 can be smoothly slid.

  And as shown in FIG. 9, the piston main body 21 which moves the inside of the 1st cylinder part 31 contact | abuts to the gasket 46 protruded from the internal peripheral surface of the 2nd cylinder part 32 of 30 A of 1st bodies, and more Movement is regulated.

  Thus, in this vibration preventing device 10, when the piston rod 23 is pushed into the second body 30B against the urging force of the coil spring 55, the piston body 21 becomes the second flange portion of the second body 30B. 45 is indirectly in contact with the first body 30A through the gasket 46, so that a large load is prevented from being applied to the first body 30A having a complicated shape and being easily deformed. Deformation can be prevented, and deformation and damage of the cylinder 30 can be effectively prevented.

  Further, in this embodiment, the piston main body 21 abuts on the gasket 46 and further movement is restricted, so that the piston main body 21 and the second flange portion 45 of the second body 30B directly contact each other. It is possible to prevent contact, and to suppress collision noise, wear of the piston body 21 and the second body 30B, and the like.

  Further, in this embodiment, the length of the second cylindrical portion 32 of the first body 30A is such that the washer plate 50 contacts the second cylindrical portion 32 of the first body 30A when the piston body 21 abuts against the gasket 46. Since it is set so as not to contact (see FIG. 9), a large load is not applied to the second cylindrical portion 32, and deformation of the first body 30A can be effectively prevented.

  In this embodiment, the length of the third cylindrical portion 39 of the second body 30B is such that the gap between the piston rod 27 and the engaging portion 80b of the rivet 80 when the piston main body 21 abuts against the gasket 46. Therefore, it is possible to prevent the piston rod 27 from coming into contact with the engaging portion 80b of the rivet 80, and to suppress a collision noise and wear of both members.

  The opening / closing body 5 is in a state in which the opening 3 is closed by a lock device (not shown) in a state where the tip of the piston rod 23 is indirectly in contact with the periphery of the opening 3 via the elastic contact member 57. Locked by. As a result, the opening / closing body 5 is always attached to the opening 3 of the automobile in a direction in which the opening / closing body 5 is opened.

  In this state, if vibration or the like occurs while the vehicle is running or idling, the opening / closing body 5 may vibrate and cause resonance. However, in the vibration preventing device 10, such vibration of the opening / closing body 5 can be prevented. That is, when the piston rod 23 that is in contact with the opening / closing body 5 via the elastic contact member 57 slides due to the vibration of the opening / closing body 5 and the piston main body 21 moves in the first cylindrical portion 31, the orifice 21a. Since the braking force acts on the piston main body 21 due to the flow resistance of the viscous fluid R passing through the vibration, the vibration of the opening / closing body 5 can be damped. It is possible to prevent unpleasant noise and discomfort.

  In this embodiment, as shown in FIGS. 4 and 8, the connecting wall 33 that connects the first cylinder part 31 and the second cylinder part 32 of the first body 30 </ b> A is closer to the second cylinder part 32. Since the piston body 21 moves in the first cylinder portion 31 toward the opening 3 side of the automobile as shown in the arrow in FIG. The air in 30 can be guided to the second tube portion 32 side along the inclination of the connecting wall 33, and the air can be prevented from biting into the gap between the piston main body 21 and the inner periphery of the cylinder 30. Furthermore, even when the piston main body 21 abuts on the connecting wall 33, the contact area of the piston main body 21 with respect to the connecting wall 33 can be made relatively small, so that the piston main body 21 sticks to the connecting wall 33 and moves. It can be prevented from disappearing.

  In addition, when the expansion-contraction cylinder part 95 of the cover member 90 shrink | contracts as mentioned above, the air in the cover member 90 is the air escape groove 93a, the clearance gap S3, and the clearance gap S2 of the cover member 90, as shown by the arrow of FIG. The slits 71 pass through the slits 71 of the stopper 60 and are discharged to the outside of the stopper 60.

  FIG. 12 shows another embodiment of the vibration preventing device for an automobile opening / closing body according to the present invention. Portions that are substantially the same as those of the above embodiment are given the same reference numerals, and descriptions thereof are omitted.

  A vibration preventing device 10a for an automobile opening and closing body (hereinafter referred to as “vibration preventing device 10a”) in this embodiment includes a connecting wall 33a that connects the first cylindrical portion 31 and the second cylindrical portion 32 of the first body 30A. Is different from the above embodiment.

  That is, the connecting wall 33a in the vibration preventing device 10a has a shape that is inclined so as to be recessed in the axial direction toward the second cylindrical portion 32. According to this aspect, the piston main body 21 comes into contact with the bent portion of the connecting wall 33a and the second cylindrical portion 32 and stops, and this becomes the top dead center. Therefore, the space C is located above the top dead center. (Refer to FIG. 12) can be secured, and air can be prevented from biting into the gap between the piston main body 21 and the inner periphery of the cylinder 30 because the air is stored in the space C.

  FIGS. 13 to 15 show still another embodiment of the vibration preventing device for an automobile opening / closing body according to the present invention. Portions that are substantially the same as those of the above embodiment are given the same reference numerals, and descriptions thereof are omitted.

  The vibration preventing device 10b (hereinafter referred to as “vibration preventing device 10b”) of the opening / closing body for an automobile in this embodiment has a flange shape, which is a portion of the second body 30B that constitutes the cylinder 30 and that is in contact with the piston body 21. The formed second flange portion 45 is configured to indirectly contact the peripheral edge of the mounting hole 7 of the opening / closing body 5 via the third flange portion 75 of the stopper 60 (see FIG. 15).

  Specifically, as shown in FIGS. 13 and 14 (a), 14 (b), the peripheral portion of the opening of the third flange portion 75 of the stopper 60 has a protruding portion 75a protruding at a predetermined height. There is no. The protrusion 75a comes into contact with the second flange portion 45 of the second body 30B and supports the second flange portion 45 when the stopper 60 is fixed to the cylinder 30 via the rivet 80. (See FIG. 15). As a result, the second flange portion 45 of the second body 30 </ b> B indirectly comes into contact with the front peripheral edge of the mounting hole 7 via the third flange portion 75 of the stopper 60 and the seal member 82.

  A plurality of air passage grooves 75 b are radially formed on the protrusion 75 a of the third flange portion 75 of the stopper 60 so as to be aligned with the cross-shaped convex portion 67 provided on the bottom 63. (See FIGS. 13 and 14). As shown in FIG. 15, the air passage groove 75b communicates with the gap S3 and the gap S2, and the air in the cover member 90 that has passed through the air escape groove 93a and the gap S3 passes therethrough. ing.

  In this embodiment, the second flange portion 45 of the second body 30 </ b> B is supported in contact with the protruding portion 75 a of the third flange portion 75 of the stopper 60, so that the piston rod 23 is connected to the coil spring 55. When the piston body 21 is pushed against the urging force toward the second body 30B and indirectly abuts against the second flange portion 45 via the gasket 46, or directly on the second flange portion 45. Even when abutting, the second flange portion 45 can be made difficult to deform.

  In addition to the above-described embodiment, for example, when the stopper 60 is fixed to the cylinder 30 via the rivet 80 by providing a rib on the periphery of the opening of the third flange portion 75 of the stopper 60, The rib may be configured to abut on and support the second flange portion 45 of the second body 30B as long as the second flange portion 45 can be supported.

  Moreover, in the said embodiment, although the sealing member 82 was arrange | positioned at the back side of the 3rd flange part 75 of the stopper 60, this seal member 82 was abbreviate | omitted and the 2nd flange part 45 of the 2nd body 30B was replaced with the stopper. The second flange portion 75 of the second body 30B may be attached to the mounting hole without using the stopper 60 itself. 7 may be brought into direct contact.

DESCRIPTION OF SYMBOLS 3 Opening part 5 Opening and closing body 7 Mounting hole 10, 10a, 10b Vibration prevention apparatus (vibration prevention apparatus) of opening and closing body for motor vehicles
20 piston 21 piston body 23, 27 piston rod 30 cylinder 30A first body 30B second body 31 first cylinder part 32 second cylinder part 33, 33a connecting wall 35 first flange part 39 third cylinder part 45 second flange part 46 Gasket 47 Space 50 Washer plate 60 Stopper 75 Third flange

Claims (13)

A vibration preventing device disposed between an opening provided in an automobile and an opening / closing body attached to the opening, for preventing vibration in a state in which the opening / closing body is closed,
A piston having a flange-like piston body and a piston rod protruding from at least one surface of the piston body;
A first body having a first cylinder part that slidably accommodates the piston body, a second cylinder part continuously provided with a reduced diameter from one end surface of the first cylinder part, and the piston rod being inserted therethrough; A cylinder connected to the other end surface of the first tube portion of one body and having a second body fixed to either the peripheral edge of the opening or the opening / closing body, and a cylinder filled with a viscous fluid;
Elastic means for projecting the piston rod from the second cylindrical portion of the first body and urging the tip of the piston rod so as to abut against the periphery of the opening or the other of the opening and closing body;
When the piston moves toward the second body against the elastic means, the piston body is configured to be in direct or indirect contact with the second body and restricted from further movement. An anti-vibration device for an opening / closing body for an automobile. A first flange portion is provided from a peripheral edge of the first cylindrical portion of the first body opposite to the second cylindrical portion, and is joined to the first flange portion at a peripheral edge of the second body. A second flange is provided,
The automobile body according to claim 1, wherein when the piston moves toward the second body against the elastic means, the piston main body abuts directly or indirectly on the second flange portion. Vibration prevention device for opening and closing body. One of the first flange portion and the second flange portion has a larger diameter than the other, and an annular gasket is disposed between both flange portions, and the peripheral edge of the larger diameter flange portion is The first body and the second body are connected by caulking,
The vibration preventing device for an automotive opening / closing body according to claim 2, wherein the gasket extends so that an inner periphery thereof is in contact with an outer periphery of the piston. 3. The opening / closing body for an automobile according to claim 2 , wherein the second flange portion of the second body is configured to abut directly or indirectly on a peripheral edge of the opening or a mounting hole peripheral edge provided in the opening / closing body. Vibration prevention device. 4. The automotive opening / closing body according to claim 3 , wherein the second flange portion of the second body is configured to abut directly or indirectly on a peripheral edge of the opening or an attachment hole peripheral edge provided in the opening / closing body. Vibration prevention device. A washer plate that is in contact with the periphery of the opening or the other of the opening / closing body is attached to the end of the piston rod that protrudes from the second cylindrical portion of the first body,
It said elastic means is a coil spring, with one end thereof is supported by the washer plate, to any one of claims 2-5 in which the other end is supported by the first flange portion of the first body A vibration preventing device for an automobile opening and closing body as described. A washer plate that is in contact with the periphery of the opening or the other of the opening / closing body is attached to the end of the piston rod that protrudes from the second cylindrical portion of the first body,
The elastic means is a coil spring, one end of which is supported by the washer plate, and the other end is supported by the first flange portion of the first body,
Wherein when the piston body is in contact via said gasket to said second body, said washer plate for automobile of the second cylindrical part according to claim 3 or 5, wherein is configured so as not to contact the said first body Vibration prevention device for opening and closing body. The piston rod, with which also protrudes from the other end face of the piston body, the third cylindrical portion for supporting the piston rod slidably has any of claims 1 to 7 provided in the second body The vibration preventing device for an opening / closing member for an automobile according to one. A stopper that is attached to the second body side of the cylinder and that fixes the cylinder to the periphery of the opening or the opening / closing body;
The third cylinder part extends longer than the piston rod, and a space part into which the piston rod is not inserted is provided at a tip part of the third cylinder part, and the stopper is disposed on the end surface of the third cylinder part via a fixture. The vibration preventing device for an automotive opening / closing body according to claim 8 , wherein the vibration preventing device is fixed. Wherein when the piston body is directly or indirectly abuts on the second body, according to claim are configured such that a gap is provided between the piston rod and the fixture protruding from the other end face of the piston body 9 A vibration preventing device for an automobile opening and closing body as described. Any said first cylindrical portion and the connecting wall for connecting the second cylindrical portion of the first body, the form an inclined shape that claims 1-10 so as to protrude in the axial direction increases toward the second cylindrical portion The vibration preventing device for an automotive opening / closing body according to any one of the above. It said first cylindrical portion and the connecting wall for connecting the second cylindrical portion of the first body, one of the axial claim forms an inclined shape as dented 1-10 increases toward the second cylindrical portion The vibration preventing device for an opening / closing member for an automobile according to one. A stopper that is attached to the second body side of the cylinder and that fixes the cylinder to the periphery of the opening or the opening / closing body;
The stopper includes an engaging claw that engages with a peripheral edge of the opening or a back side peripheral edge of a mounting hole provided in the opening and closing body, and a flange portion that engages with a front peripheral edge of the mounting hole.
It said second body, portions the piston body abuts, preventing vibration of the motor vehicle opening and closing member according to the flange portion of the fastener to any one of Configured claims 1-12 to abut apparatus.