JP2012140977A - Damping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a damping device, in which a valve can be moved by a large amount and a rotation range of a flap can be increased without increasing the rotating directional dimension of the flap and a case housing the flap.SOLUTION: The damping device 30 includes: the case 31; a fluid filled space 37 filled with a viscous fluid; and the flap 45 provided in the fluid filled space and rotating around a rotary shaft 49. The damping device 30 also includes: an inner flow passage 52 formed in the flap, extending in a direction parallel with the rotary shaft, formed with inlets 57 and 58 in one of opening ends thereof, and formed with outlets 53 and 54 in the other opening end thereof; a valve 63 provided in the inner flow passage to open and close the inlets by moving in the direction parallel with the rotary shaft; and an urging member 69 provided in the inner fluid passage to move the valve by urging the valve toward a closing position, in which the inlets are closed.

Description

  The present invention relates to an attenuation device using a viscous fluid that can be used in a vehicle door check device or the like.

Patent document 1 is disclosing the door check apparatus for vehicles provided with the attenuation device using a viscous fluid.
The vehicle of Patent Document 1 includes a vehicle main body and a door provided on the vehicle main body so as to be rotatable about an axis in the vertical direction. A door check device case is fixed to the door. The inner space of the case is provided with a flap that can rotate about a rotation axis extending in the vertical direction, and the inner space is filled with a viscous fluid (oil). Further, the upper end portion of the rotating shaft protrudes above the case and is fixed to the vehicle above the case.
The flap is formed with a first internal channel and a second internal channel that penetrate the flap in the horizontal direction (the thickness direction of the flap). One open end of the first internal flow path and the second internal flow path is an inlet that allows the viscous fluid to enter the internal flow path, and the other open end allows the viscous fluid that has entered the internal flow path to pass through the flap. It is an outlet for discharging to the outside (inner space of the case). The inlet of the first internal channel and the outlet of the second internal channel are formed on one side of the flap (in the rotational direction), and the outlet of the first internal channel and the inlet of the second internal channel are the flaps. It is formed on the other surface side. Furthermore, inside the first internal flow path and the second internal flow path, a valve that can move along the axis of each internal flow path and opens and closes the inlet, and a plate that urges the valve to move in the direction of closing the inlet And a spring.

When the door is stationary, the valves provided in the first internal flow path and the second internal flow path block the respective inlets so that the viscous fluid exits the first internal flow path and the second internal flow path from the inlet side. Since the passage to the side is restricted, the door does not rotate even if a small external force is unexpectedly applied to the door.
Further, when the door is rotated in the opening direction, the flap rotates in one direction around the rotation axis inside the case. Then, pressure is applied to the valve from one of the inlets of the first internal channel and the second internal channel, and the valve opens the inlet, so that the viscous fluid flows into the one internal channel from the inlet. It is discharged from the exit. On the other hand, since the pressure of the viscous fluid is not applied to the other inlet of the first internal channel and the second internal channel, the viscous fluid does not enter the internal channel from the inlet. As the viscous fluid passes through one of the internal flow paths by opening the door in this way, the resistance applied to the flap from the viscous fluid is reduced, so that the door can be rotated with a small force.
On the other hand, when the door is rotated in the closing direction, the viscous fluid passes through the other internal channel (passage of the viscous fluid from the inlet side of one internal channel is regulated by the valve). The door can be rotated with a small force.

JP 2010-137734 A

  In order to reliably move the valve to open the inlet, it is necessary to increase the axial dimension of the internal flow path. However, the damping device of Patent Document 1 forms a first internal flow path and a second internal flow path extending in the thickness direction (the rotation direction of the flap) in the flap, and a valve and a leaf spring are disposed in each internal flow path. Because of this structure, the flap becomes thicker in the rotational direction when the internal flow path is lengthened. However, as the thickness of the flap increases, the gap between the internal space of the case and the flap (in the direction of rotation of the flap) decreases, and the range in which the flap can rotate becomes narrow. It becomes impossible to correspond to.

  An object of the present invention is to provide an attenuation device that can move a valve and increase a rotation range of a flap without increasing the size of the flap and the case in which the flap is stored in the rotational direction.

  The damping device of the present invention is a damping device comprising a case, a fluid filling space configured to fill the viscous fluid, and a flap that is provided in the fluid filling space and rotates around a rotation axis. An internal flow path formed in the flap and extending in a direction parallel to the rotation axis, one opening end portion constituting an inlet, and the other opening end portion constituting an outlet, and provided in the internal flow passage A valve that opens and closes the inlet by moving in a direction parallel to the rotating shaft, and a biasing means provided in the internal flow path for biasing the valve toward the closed position for closing the inlet; It is characterized by having.

  The internal flow path is formed at two locations across the rotation axis of the flap, and the valve provided on one of the internal flow paths moves to the open position only when the flap rotates in one direction, The valve provided in the other internal flow path may move to the open position only when the flap rotates in the other direction.

  An insertion hole for inserting the valve and the biasing means may be formed at the opening end on the same side of the two internal flow paths.

  A seal mounting groove may be provided on the surface of the flap so as to be fitted with a seal member that is parallel to the axis of the internal flow path and whose both ends are open in the axial direction and slidably contacts the inner surface of the fluid filling space.

According to the present invention, when the flap is stationary, the valve provided in the internal channel blocks the inlet, thereby restricting the viscous fluid from passing from the internal channel inlet side to the outlet side. A large force is required to rotate. However, if the flap is rotated around one of the rotation axes, the viscous fluid that has entered the internal channel from the inlet while pressing the valve is discharged from the outlet to the outside, and the resistance that the flap receives from the viscous fluid decreases. The flap can be rotated with a small force.
In addition, since the internal flow path extends in a direction parallel to the rotation axis of the flap (extends in a direction orthogonal to the rotation direction), the valve can be installed inside the flap and the case without increasing the size in the rotation direction. It is possible to move greatly within the flow path and increase the rotation range of the flap.

  According to the second aspect of the present invention, even when the flap is rotated in any direction, the resistance that the flap receives from the viscous fluid can be reduced.

  According to the invention described in claim 3, since the valve and the urging means can be inserted into the two internal flow paths from the same end side, the valve and the urging means can be easily inserted into each of the internal flow paths. .

According to the fourth aspect of the invention, the fluid filling space can be divided into two spaces in a liquid-tight state by the seal member.
Further, since the seal mounting groove is parallel to the axis of the internal flow path and both ends are open in the axial direction, a flap is formed using a mold having a convex portion corresponding to the internal flow path and a convex portion corresponding to the seal mounting groove. When forming the two, the two convex portions formed on the mold can be formed in parallel to each other. Therefore, since the shape of the mold is simplified, it is possible to reduce the manufacturing cost of the mold.

It is a perspective view showing the vehicle body of one embodiment of the present invention, a door, and a door check device. It is a front view of a door check apparatus. It is sectional drawing which follows the III-III arrow line of FIG. It is sectional drawing which follows the IV-IV arrow line of FIG. It is the disassembled perspective view seen from the back of a flap and its internal components. It is the disassembled perspective view seen from the front of the flap and its internal components. It is a front view of a flap. It is sectional drawing which follows the VIII-VIII arrow line of FIG. It is sectional drawing which follows the IX-IX arrow line of FIG. 7, (a) is a figure when a flap is stationary, (b) is a figure when a flap is rotating. It is sectional drawing which follows the XX arrow line of FIG. 7, (a) is a figure when a flap is stationary, (b) is a figure when a flap is rotating.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows a front edge portion of a side opening of a vehicle body 10 of an automobile (vehicle), and a side door 11 (FIG. 1) attached to the front edge portion so as to be rotatable around a vertical rotation attachment shaft (not shown). 2 shows an intermediate position between the fully closed position and the fully opened position), and a door check device 15 provided so as to straddle the vehicle body 10 and the side door 11.

First, the detailed structure of the door check device 15 will be described. In addition, each direction for demonstrating the following door check apparatuses 15 is based on the arrow line direction described in the figure.
A bracket 17 having an upper piece 18 and a lower piece 19 is fixed to the front edge portion of the side opening of the vehicle body 10 by bolts (not shown), and the upper piece 18 and the lower piece 19 are arranged in the vertical direction. The two upper and lower portions of the rotary support shaft 20 that extend and have the spherical support portion 21 in the middle are fixed.
Between the upper piece 18 and the lower piece 19, the left end portion of the main drive link 22 extending in a direction substantially parallel to the left-right direction (horizontal direction) is located. The main drive link 22 is composed of a metal core member 23 provided inside and a hard resin skin portion 26 covering the periphery of the metal core member 23, and a rotation support shaft 20 and a rotation support described later at the left and right ends. A spherical support hole 27 and a spherical support hole 28 for inserting the shaft 86 are formed. As shown in FIG. 3, the spherical support hole 27 has a shape obtained by cutting off the upper and lower ends of the sphere, and the upper and lower ends thereof are open. The inner diameter (curvature of the inner surface) of the spherical support hole 27 is substantially the same as the outer diameter (curvature) of the spherical support portion 21, and the spherical support portion 21 is fitted in the spherical support hole 27 as shown in FIG. Thus, since the left end portion of the main link 22 is supported on the rotation support shaft 20 by the ball joint including the spherical support portion 21 and the spherical support hole 27, the left end portion of the main drive link 22 is located above and below the spherical support portion 21. It is possible to rotate not only around the direction axis but also around the axis inclined with respect to the vertical direction. On the other hand, as shown in FIG. 4, the spherical support hole 28 has a shape in which both front and rear end portions of the sphere are cut off, and both front and rear ends thereof are open. The metal core member 23 is obtained by twisting an intermediate portion of a narrow flat plate having circular through holes 24a and 25a formed at both end portions by 90 °, a horizontal plate portion 24 positioned on the left side of the intermediate portion, and an intermediate portion. And a vertical plate portion 25 located on the right side. Thus, if the metal core material 23 is formed by twisting a flat plate in which the circular through holes 24a and 25a are previously formed at both ends, the metal core material 23 is compared with the case where the circular through holes 24a and 25a are formed after twisting. Is easy to mold. As shown in FIGS. 3 and 4, a spherical support hole 27 is located inside the circular through hole 24 a formed in the horizontal plate portion 24, and the spherical support hole 27 is formed inside the circular through hole 25 a formed in the vertical plate portion 25. A support hole 28 is located.

  A recess (not shown) is formed in the end surface of the side door 11 facing the front edge of the side opening, and the resistance generator 30 and a portion excluding the left end of the main link 22 in the recess, and A driven link 84, which will be described later, is provided. The resistance generator 30 has a case 31 fixed to the inner surface of the recess, and the case 31 has a main body 32 and a lower protrusion 33 that protrudes downward from the left end of the main body 32. It is a P-shaped member. The downward projecting portion 33 is formed with a link receiving hole 34 extending in the left-right direction and penetrating the main link 22 so as to be relatively movable. A rubber cushioning member 35 is fixed to the right side surface of the downward projecting portion 33. is there.

  As shown in FIGS. 2 and 8, a fluid filling space 37 is formed inside the main body 32. The fluid filling space 37 has a first space 38 and a second space 39 which are arc-shaped with a central angle slightly smaller than 180 ° when viewed from the front and are symmetrical with each other. Further, as shown in FIG. 8, the inner wall of the fluid filling space 37 has a first communication path 40 that communicates the upper half of the first space 38 and the lower half of the second space 39, and the first space 38. A second communication path 41 that connects the lower half portion and the upper half portion of the second space 39 is formed. On the other hand, the upper half of the first space 38 and the upper half of the second space 39 are not connected to each other, and the lower half of the first space 38 and the lower half of the second space 39 are also not connected to each other. The first communication path 40 and the second communication path 41 are also not in communication with each other. A pair of front and rear central bearing holes 42 are formed on both front and rear surfaces of the main body 32 to communicate the outer space of the case 31 and the center of the fluid filling space 37 and are concentric with each other.

The fluid filling space 37 is provided with a hard resin flap (rotary body) 45. The flap 45 includes a cylindrical part 46 that extends in the front-rear direction constituting the central part thereof, a first arc part 47 that extends from the cylindrical part 46 in the left-right direction, and whose central angle is smaller than the first space 38 and the second space 39, and A second arc portion 48 and a pair of rotating shafts 49 extending in the front-rear direction from the front and rear surfaces of the cylindrical portion 46 are provided. The thickness (front-rear dimension) of the cylindrical portion 46, the first arc portion 47, and the second arc portion 48 is substantially the same as that of the fluid filling space 37. The rotating shaft 49 has a large diameter portion 50 that is continuous with the cylindrical portion 46, and a small diameter portion 51 that protrudes from the tip of the large diameter portion 50, and each large diameter portion 50 corresponds to the corresponding central bearing hole 42. Is fitted in a liquid-tight state so as to be rotatable (see FIG. 9).
As shown in FIG. 5, substantially cylindrical storage recesses 52 extending forward are formed in the rear surfaces of the first arc portion 47 and the second arc portion 48, and the rear portions of the respective storage recesses 52 are rearward. A first outlet groove 53 and a second outlet groove 54 that are open at the ends are recessed. Further, the first arc path 47 and the second arc part 48 have rear ends that are connected to the storage recesses 52 at the rear surfaces thereof, and the lower ends of the first arc path 47 and the second arc part 48 open at the lower surfaces of the first discharge path 55 and the second arc path 48, respectively. Two discharge paths 56 are recessed. On the other hand, as shown in FIG. 6, the front surfaces of the first arc portion 47 and the second arc portion 48 have a first inlet 57 and a second inlet 58 communicating with the internal space of each storage recess 52, respectively, and a lower end is the first. A first introduction path 59 and a second introduction path 60 which are connected to the inlet 57 and the second inlet 58 and open at the upper surfaces of the first arc portion 47 and the second arc portion 48 respectively are recessed. Further, the front surface, the rear surface, and the left and right end surfaces of the flap 45 are annular in plan view as a whole except for the portion where the storage recess 52 is formed (the portions formed on the front and rear end surfaces of the cylindrical portion 46 are the large diameter portions 50). The seal mounting groove 61 is recessed. The portions formed on both the left and right sides of the seal mounting groove 61 are parallel to the axis of the housing recess 52, and the front and rear ends of the portion of the seal mounting groove 61 are open in the axial direction. The flap 45 can be molded using a pair of molds (a mold that forms the front part of the flap 45 and a mold that forms the rear part of the flap 45) that move toward and away from each other while moving linearly in the axial direction of the storage recess 52. Since both left and right portions of the seal mounting groove 61 are parallel to the axis of the storage recess 52 and both ends thereof are open in the axial direction, for example, one mold (rear mold) is a projection corresponding to the storage recess 52. , Having a convex part corresponding to the rear part of the seal mounting groove 61 and convex parts corresponding to both the left and right parts of the seal mounting groove 61, the other mold (front mold) corresponding to the front part of the seal mounting groove 61 In the case of having the convex portions to be formed, the three convex portions of one type can be formed in parallel to each other. Therefore, since the shape of the mold is simplified, it is possible to reduce the manufacturing cost of the mold.

  A valve 63, an O-ring 67, a leaf spring 69, and a lid member 73 are overlapped and fitted in the storage recesses 52 of the first arc portion 47 and the second arc portion 48 from the rear. The resin valve 63 has a substantially cylindrical shape with an opening at the rear end and substantially the same diameter as the inner diameter of the housing recess 52. An annular step 65 is formed at the rear end of the outer peripheral surface. An O-ring 67 made of an elastic material is fitted to the opening / closing protrusion 64 of each valve 63. Each open / close protrusion 64 is fitted to the first inlet 57 and the second inlet 58 from the rear, and each O-ring 67 is in contact with the inner surface of the storage recess 52 and the valve 63 (see FIG. 10, second). The side of the inlet 58 is not shown). The plate spring 69, which is a processed metal plate, has a substantially trapezoidal shape in plan view, and has a front end portion that is a flat plate portion 70, and a pair of left and right pressing portions 71 that are formed at the rear end portion. The portion excluding the rear portion of the leaf spring 69 is housed inside the valve 63 (see FIG. 9, the second inlet 58 side is not shown). The hard resin lid member 73 is a member having a substantially cylindrical shape with an open front surface, and has an inner diameter that is substantially the same as the outer diameter of the annular step portion 65, and the outer diameter is the valve 63 (frontward of the annular step portion 65 Is substantially the same as the outer diameter of the portion. On the rear end surface of each lid member 73, a seal mounting groove 74 extending in the radial direction and a discharge groove 75 communicating with the internal space of the lid member 73 and having a lower end opened at the outer peripheral edge of the rear end surface are formed. . Further, a guide protrusion 78 extending forward is projected from the bottom (rear part) of the internal space of the lid member 73. On the outer surface of the guide projection 78, a pair of tip inclined surfaces 79 and a pair of back side inclined surfaces 80 are formed which are symmetrical to each other. The front part of each lid member 73 is slidably fitted to the annular step part 65 of the valve 63 so as to be slidable in the front-rear direction (the axial direction of the housing recess 52), and the pair of inclined front end surfaces 79 of the guide protrusions 78 are plates. The pair of pressing portions 71 of the spring 69 are in contact with each other. Since the leaf spring 69 in a free state is slightly elastically deformed when the tip inclined surface 79 comes into contact with the pressing portion 71, a backward movement biasing force is applied from the leaf spring 69 to the lid member 73, but the lid member 73 is illustrated. Are fixed to the flap 45 by screws, and the rear end surface of the lid member 73 and the rear surfaces of the first arc portion 47 and the second arc portion 48 are located on the same plane. The seal mounting groove 74 and the seal mounting groove 61 are continuous with each other. The seal mounting groove 61 and the seal mounting grooves 74 of the two lid members 73 have an annular seal member 82 made of an elastic material such as rubber (the portions corresponding to the circular grooves formed on both end faces of the cylindrical portion 46 are circular). However, the annular seal member 82 is always in contact with the inner surface of the fluid filling space 37 so as to be slidable in a liquid-tight state (see FIG. 9). The first space 38 and the second space 39 are an upper space located above the annular seal member 82 and a lower space located below the annular seal member 82. Are separated in a non-communication state. However, the upper space of the first space 38 and the lower space of the second space 39 are communicated with each other by the first communication path 40, and the lower space of the first space 38 and the upper space of the second space 39 are the second communication path. 41 communicate with each other. The fluid filling space 37 (excluding the space occupied by the flap 45, the valve 63, the O-ring 67, the leaf spring 69, and the lid member 73) is filled with a viscous fluid (for example, oil).

A pair of driven links 84 extending in the radial direction of the first space 38 and the second space 39 are disposed before and after the case 31, and a pair of small diameter portions are formed in through holes formed at the upper ends of the pair of driven links 84. 51 (rotating shaft 49) are respectively fitted and fixed. On the other hand, both ends of a rotation support shaft 86 extending in the front-rear direction and having a spherical support portion 87 in the middle are fixed to the lower ends of the pair of driven links 84. As shown in FIG. 4, the outer diameter of the spherical support portion 87 is substantially the same as the inner diameter (curvature of the inner surface) of the spherical support hole 28, and the spherical support portion 87 is fitted in the spherical support hole 28. In this way, the lower end of the driven link 84 and the right end of the main drive link 22 are connected by the ball joint comprising the spherical support hole 28 and the spherical support 87, so the lower end of the follow link 84 is the right end of the main drive link 22. On the other hand, the rotation support shaft 86 can be rotated not only about the axis in the axial direction (front-rear direction) but also about the axis inclined with respect to the axial direction.
The bracket 17, the rotation support shaft 20, the main drive link 22, the resistance generator 30 (the case 31, the buffer member 35, the flap 45, the valve 63, the O-ring 67, the leaf spring 69, the lid member 73, and the annular seal member 82 described above. ), The driven link 84 and the rotation support shaft 86 are components of the door check device 15.

Next, the operation of the door check device 15 will be described.
When the side door 11 is located at the fully closed position that closes the side opening of the vehicle body 10, the right end portion of the main drive link 22 protrudes greatly to the right from the link receiving hole 34 (not shown). Is located at the rotational position indicated by reference numeral 84A in FIG. The rotation position of the flap 45 in the fluid filling space 37 at this time is a position indicated by reference numeral 45A in FIG. 8 (position indicated by a two-dot chain line). At this time, since the flap 45 is stationary at the position, the valve 63, the O-ring 67, the leaf spring 69, and the lid member 73 of the first arc portion 47 and the second arc portion 48 are shown in FIG. 10 (a).

When the vehicle body 10 is rotated from the fully closed position to the intermediate position, the main drive link 22 slightly slightly in the vertical direction with respect to the link receiving hole 34 (downward projecting portion 33) around the spherical support portion 21 and the spherical support hole 27. Since it slides relative to the left while swinging, the driven link 84 rotates to the rotational position indicated by the solid line in FIGS. 1 and 2 (the position indicated by reference numeral 84B in FIGS. 1 and 2), and the flap 45 is in FIG. Rotate clockwise in FIGS. 2 and 8 to the position indicated by reference numeral 45B.
When the first arc portion 47 performs the rotation, the viscous fluid positioned above the first arc portion 47 in the first space 38 passes through the gap between the inner surface of the first space 38 and the first introduction path 59. The opening / closing protrusion 64 provided in the first circular arc portion 47 is pressed rearward. Then, as shown in FIG. 9B, the pair of pressing portions 71 of the leaf spring 69 move toward the back side inclined surface 80 while spreading along the tip inclined surface 79, and slide the surface of the back side inclined surface 80 backward. Therefore, the entire valve 63 slides backward in the housing recess 52, and the opening / closing projection 64 opens the first inlet 57 as shown in FIG. 10B (at this time, between the valve 63 and the lid member 73). Part of the viscous fluid filled in the internal space flows to the first space 38 side through the discharge groove 75). Then, as shown by the arrow in FIG. 10B, the viscous fluid enters the storage recess 52 from the first inlet 57, passes through the first outlet groove 53, and is below the first arc portion 47 in the first space 38. It is discharged to the position (the region occupied by the first arc portion 47 until just before).
On the other hand, when the second arc portion 48 rotates from the position 45A in FIG. 8 to the symbol 45B in FIG. 2, the lower surface of the second arc portion 48 moves the viscous fluid in the second space 39 downward (clockwise downward). Part of the viscous fluid filling the lower space of the second space 39 (the space positioned below the annular seal member 82) passes through the first communication path 40 and the upper space of the first space 38 ( It flows in a space located above the annular seal member 82. Since the second arc portion 48 rotates downward, the viscous fluid located above the second arc portion 48 (on the side opposite to the rotation direction of the second arc portion 48) passes through the second introduction path 60 and is second. Since it does not flow into the inlet 58 vigorously, the opening / closing protrusion 64 on the second arc portion 48 side does not open the second inlet 58. Further, when the second arc portion 48 rotates downward, the viscous fluid located below the second arc portion 48 flows into the internal space between the valve 63 and the lid member 73 from the discharge groove 75 of the lid member 73. The valve 63 is pushed forward to try to make it, but when the valve 63 is pushed forward, the closed state of the second inlet 58 by the opening / closing projection 64 becomes stronger, so that the valve 63 and the lid member 73 are not closed. The viscous fluid filled in the internal space does not pass through the second inlet 58.

  Since the flap 45 (and the valve 63, the leaf spring 69, and the lid member 73) have such a function, when the side door 11 starts to rotate, that is, until the opening / closing projection 64 opens the first inlet 57. A large resistance is applied to the flap 45 from the viscous fluid. However, when the opening / closing protrusion 64 opens the first inlet 57, the viscous fluid starts to flow into the internal space (the first inlet 57, the storage recess 52, and the first outlet groove 53) of the first arc portion 47, so that the flap from the viscous fluid. 45. The forward biasing force from the leaf spring 69 to the valve 63 gradually increases as the resistance applied to 45 rapidly decreases and the leaf spring 69 moves backward in the housing recess 52 and the opening amount of the leaf spring 69 increases. Therefore, after the side door 11 rotates by a predetermined angle or more, the side door 11 can be smoothly rotated to a middle position with a small force. Further, the viscous fluid that has flowed from the upper space of the first space 38 to the lower space of the first space 38 through the inner space of the first arc portion 47 passes through the second communication path 41 and rotates into the upper space (rotation) of the second space 39. It flows into the space occupied by the second arc portion 48 before the start. Therefore, the fluid filling space 37 is always filled with the viscous fluid except for the occupied space by the flap 45, the valve 63, the O-ring 67, the leaf spring 69, and the lid member 73 when the flap 45 is located at any rotational position. .

When the side door 11 is temporarily stopped at the intermediate position, the leaf spring 69 is restored to its initial state by its own elastic force, and the opening / closing projection 64 of the valve 63 closes the first inlet 57 again. If the rotation is attempted again from the intermediate position in the opening direction, a large resistance is applied to the flap 45 from the viscous fluid until the opening / closing protrusion 64 opens the first inlet 57 again. Therefore, it is possible to prevent the side door 11 stopped at the intermediate position from rotating unexpectedly by an unintended light external force.
On the other hand, when the opening / closing protrusion 64 opens the first inlet 57 again, the resistance applied to the flap 45 from the viscous fluid is rapidly reduced, and therefore the side door 11 can be smoothly rotated to a fully opened position with a small force. When the side door 11 rotates to the fully open position, the main link 22 further swings in the vertical direction around the spherical support portion 21 and the spherical support hole 27 with respect to the link receiving hole 34 (downward projecting portion 33). Since it slides relative to the left, the driven link 84 rotates to the rotational position indicated by reference numeral 84C indicated by the phantom line in FIG. 2, and the lower end of the driven link 84 contacts the buffer member 35 (see FIG. 2). On the other hand, the flap 45 rotates to a position indicated by reference numeral 45C indicated by a one-dot chain line in FIG. At this time, the operations of the valve 63, the leaf spring 69, and the lid member 73 provided in the first arc portion 47 and the second arc portion 48 and the flow of the viscous fluid in the fluid filling space 37 are performed from the fully closed position to the intermediate position. It is the same as when rotating up to.

Next, the operation for returning the side door 11 in the fully open position to the fully closed position will be described.
In this case, the main link 22 slides to the right with respect to the link receiving hole 34 (downward projecting portion 33) while slightly swinging in the vertical direction around the spherical support portion 21 and the spherical support hole 27. 8 is rotated in the counterclockwise direction in FIG. Then, the viscous fluid located immediately above the second arc portion 48 in the second space 39 flows from the gap between the inner surface of the second space 39 and the second introduction path 60 to the second inlet 58 and is provided in the second arc portion 48. Since the opening / closing protrusion 64 of the valve 63 is pressed rearward, the entire valve 63 slides rearwardly in the housing recess 52 formed in the second arc portion 48 (the valve 63 provided in the second arc portion 48 at this time). Part of the viscous fluid filled in the internal space between the cover member 73 and the lid member 73 flows to the second space 39 side through the discharge groove 75), and the opening / closing protrusion 64 of the valve 63 provided in the second arc portion 48. Opens the second inlet 58. Then, the viscous fluid enters the storage recess 52 from the second inlet 58, passes through the second outlet groove 54, and is located below the second arc portion 48 in the second space 39 (the second arc portion 48 is until just before). It is discharged to the occupied area). On the other hand, when the first arc portion 47 rotates counterclockwise in FIG. 8 from the position of 45C in FIG. 8, the lower surface of the first arc portion 47 moves the viscous fluid in the first space 38 downward (counterclockwise downward). ), A part of the viscous fluid filling the lower space of the first space 38 (the space positioned below the annular seal member 82) passes through the second communication passage 41 and is the upper space of the second space 39. The viscous fluid that flows to (a space located above the annular seal member 82) and flows from the upper space of the second space 39 to the lower space of the second space 39 through the inner space of the second arc portion 48 is the first ream. It flows through the passage 40 into the upper space of the first space 38 (the space occupied by the first arc portion 47 until just before).
Therefore, even when the side door 11 is rotated in the closing direction, it is possible to smoothly rotate the side door 11 to the fully closed position with a small force, and the fluid filling space 37 includes the flap 45, the valve 63, Except for the space occupied by the O-ring 67, the leaf spring 69, and the lid member 73, it is always filled with viscous fluid.

As described above, the door check device 15 of the present embodiment unexpectedly rotates due to a light external force that is not intended by the side door 11 that is stationary at a position between the fully closed position and the fully open position (for example, the intermediate position). This can be prevented, and after the side door 11 is rotated, the side door 11 can be smoothly rotated with a small force.
In addition, the internal flow path (the flow path formed by the housing recess 52, the valve 63, and the lid member 73) for allowing the viscous fluid formed inside the flap 45 to pass is a direction substantially parallel to the rotation shaft 49 of the flap 45. Therefore, the internal flow path (accommodation recess 52) is elongated in the front-rear direction so that the valve 63 can be moved greatly in the front-rear direction in the accommodation recess 52, thereby the It is possible to ensure the opening / closing operation of the first inlet 57 and the second inlet 58. In addition, even if the internal flow path is lengthened in the front-rear direction, the flap 45 does not increase in the rotation direction. Therefore, even if the fluid filling space 37 is not increased (in the rotation direction), the fluid filling of the flap 45 is performed. The rotation range with respect to the space 37 can be increased (the side door 11 that can rotate with respect to the vehicle body 10 in a large range can be handled).

Furthermore, since the driven link 84 that rotates together with the flap 45 is rotatably connected to the main drive link 22 that moves in conjunction with the opening / closing operation of the side door 11, when the side door 11 is opened and closed, the main drive link 22, the driven link 84, And the flap 45 operates reliably without slipping. Therefore, if the side door 11 is opened and closed, the door check device 15 operates reliably.
Further, when the driven link 84 rotates around the rotation shaft 49, a vertical force is applied from the driven link 84 to the right end portion of the main driving link 22, but the main driving link 22 moves up and down around the spherical support portion 21 and the spherical support hole 27. Since the vertical force is absorbed by swinging in the direction, an excessive force is not applied to the connecting portion between the main link 22 and the bracket 17. Further, when the driven link 84 rotates, the main drive link 22 rotates in the left-right direction around the spherical support portion 21 and the spherical support hole 27, so that the right end portion of the main drive link 22 and the connection portion of the follower link 84 have a left-right direction. If an excessive force is applied to the connection portion in the left-right direction, although the force is applied, the main link 22 is centered on the spherical support portion 21, the spherical support hole 27, the spherical support portion 87, and the spherical support hole 28. Since this force is absorbed by rotating slightly around the axis of the shaft, an unreasonable force is not applied to the connecting portion of the main link 22 and the driven link 84. Accordingly, the resistance generator 30 always operates smoothly in conjunction with the opening / closing operation of the side door 11.

  Further, the main link 22 is subjected to a horizontal force with the rotation in the left-right direction, and a vertical force is applied with the rotation of the driven link 84. Therefore, the entire metal core 23 is assumed to be horizontal or vertical. In the case of a flat plate, the mechanical resistance to one of the horizontal force and the vertical force is small. However, since the metal core member 23 of the present embodiment has a structure in which half is a horizontal plate portion 24 and the other half is a vertical plate portion 25, a large mechanical resistance against both horizontal force and vertical force. Demonstrate power. Therefore, even if the side door 11 is repeatedly opened and closed, the main link 22 is less likely to be subjected to great mechanical damage.

As mentioned above, although this invention was demonstrated using the said embodiment, this invention can be implemented, giving various changes.
For example, instead of the leaf spring 69, a biasing means having a different structure (for example, a compression coil spring) may be used.
Further, the first communication path 40 and the second communication path 41 may be formed in the cylindrical portion 46 of the flap 45.
Furthermore, the resistance generating device 30 that is a damping device may be used as a part of a device different from the door check device 15 (for example, a door check device between the rear opening of the vehicle body and the back door).

DESCRIPTION OF SYMBOLS 10 Vehicle body 11 Side door 15 Door check apparatus 17 Bracket 18 Upper piece 19 Lower piece 20 Rotation support shaft 21 Spherical support part 22 Main link 23 Metal core material 24 Horizontal plate part 25 Vertical plate part 26 Skin part 27 Spherical support hole 28 Spherical support hole 30 Resistance generator (attenuator)
31 Case 32 Body 33 Lower protrusion 34 Link receiving hole 35 Buffer member 37 Fluid filling space 38 First space 39 Second space 40 First communication path 41 Second communication path 42 Center bearing hole 45 Flap 46 Column 47 Arc part (first flap part)
48 Second arc part (second flap part)
49 Rotating shaft 50 Large diameter portion 51 Small diameter portion 52 Storage recess (internal flow path) (insertion hole)
53 1st exit groove (exit)
54 Second outlet groove (exit)
55 First discharge path 56 Second discharge path 57 First inlet (inlet)
58 Second entrance (entrance)
59 First introduction path 60 Second introduction path 61 Seal mounting groove 63 Valve 64 Opening / closing protrusion 65 Annular step 67 O-ring 69 Leaf spring (biasing means)
70 flat plate portion 71 pressing portion 73 lid member 74 seal mounting groove 75 discharge groove 78 guide projection 79 tip inclined surface 80 deep side inclined surface 82 annular seal member 84 driven link 86 rotation support shaft 87 spherical support portion

Claims (4)

Case and
A fluid-filling space configured to fill the viscous fluid configured in the case;
A flap provided around the rotation axis provided in the fluid filling space;
A damping device comprising:
An internal flow path formed in the flap, extending in a direction parallel to the rotation axis, one opening end portion constituting an inlet, and the other opening end portion constituting an outlet;
A valve provided in the internal flow path for opening and closing the inlet by moving in a direction parallel to the rotation axis;
A biasing means provided in the internal flow path for biasing the valve toward the closed position for closing the inlet;
An attenuation device comprising: The damping device according to claim 1.
The flap has a first flap portion and a second flap portion that extend in opposite directions from the rotating shaft and respectively form the internal flow path,
The valve provided in one of the internal flow paths moves to an open position that opens the inlet only when the flap rotates in one direction, and the valve provided in the other internal flow path has the flap in the other direction. A damping device that moves to the open position only when it is rotated to the right. The damping device according to claim 2,
An attenuation device in which an insertion hole for inserting the valve and the biasing means is formed at the opening end on the same side of the two internal flow paths. The damping device according to any one of claims 1 to 3,
An attenuation device in which a seal mounting groove is provided on the surface of the flap so that a seal member that is parallel to the axis of the internal flow path and open at both ends in the axial direction and into which a seal member that slides in contact with the inner surface of the fluid filling space is fitted.