JP7115967B2 - cushion device - Google Patents

Description

The present invention is a cushion device disposed between a fixed member and a moving member that moves toward and away from the fixed member, for suppressing impact when the moving member collides with the fixed member. Regarding.

For example, a movable member such as a back door is attached to an opening of a fixed member such as a body on the luggage compartment side of an automobile so that it can be opened and closed. However, when the movable member is closed with respect to the opening, a relatively large impact force acts, which may cause a problem of impact noise or damage the fixed member and the movable member. Therefore, generally, a cushioning member is attached between the fixed member and the moving member to suppress the impact. As a cushioning member, for example, there is a cylindrical one made of rubber or the like, and by attaching this to a fixing member such as a body or an opening/closing member such as a back door, it is possible to provide cushioning when the opening/closing member is closed. It has become.

By the way, when a movable member such as a back door is closed with respect to an opening of a fixed member such as a body, the gap between the fixed member and the movable member tends to vary due to individual differences in vehicles. . Therefore, it is necessary to adjust the height of the cushioning member so as to fit the gap for each individual vehicle.

As a height-adjustable cushioning member as described above, Patent Document 1 below discloses a retainer having a double tubular structure of an inner cylinder and an outer cylinder, which is attached to a primary member such as a vehicle body, and the retainer. A tubular sleeve inserted between the inner cylinder and the outer cylinder so as to be vertically slidable and having an upper end surface in contact with a secondary member such as a door; and a braking rod inserted into the inner cylinder of the retainer. An adjustable thrust receiver is described with a The inner cylinder of the retainer is formed with a flexible clamping plate having projections on its outer surface. In addition, a cam is provided at a substantially intermediate position of the brake rod in the axial direction, for flexing the tightening thin plate outward when the brake rod is rotated by a predetermined angle. When it is desired to adjust the height of the upper end surface of the tubular sleeve, the tubular sleeve inserted between the inner and outer cylinders of the retainer is pushed in and pulled back to adjust the height of the upper end surface of the tubular sleeve. When the height of the end face is adjusted and then the braking rod is rotated by a predetermined angle, the clamping thin plate is flexed outward by the cam, and the projection on the outer surface bites into the inner surface of the cylindrical sleeve. Sliding is restricted.

JP-A-2-76915

In the case of the adjustable thrust receiver of Patent Document 1, there is a problem that the number of parts is large because it consists of a retainer, a cylindrical sleeve and a braking rod.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a cushioning device which is capable of adjusting the amount of projection of a cushioning portion with respect to a fixed portion and fixing the position of the cushioning portion, and which has a small number of parts.

In order to achieve the above object, the present invention provides a moving member disposed between a fixed member and a moving member that moves toward and away from the fixed member so that the moving member collides with the fixed member. A cushion device for suppressing impact, comprising: a fixed portion fixed to one of the fixed member and the movable member; and a member from the fixed portion to the other of the fixed member and the movable member. and a first member rotatably assembled to the support portion of the first member and movable in the direction of the rotation axis thereof, the end portion facing the other member a second member having a cushion portion in the second member, one of the first member or the second member is provided with a flexible elastic wall, and the other of the first member or the second member is provided with a fixed wall arranged adjacent to the inner side or the outer side of the elastic wall, and the opposing surfaces of the elastic wall and the fixed wall are arranged at predetermined intervals in the axial direction and are fitted to When the elastic wall is flexed, the uneven portions ride over each other, allowing the second member to move in the direction of the rotation axis. The first member or the second member having a wall is provided with a deflection regulating wall arranged adjacent to the outside or inside of the elastic wall, and the first member and the second member are provided. is relatively rotated to introduce the elastic wall between the fixed wall and the deflection restricting wall, thereby restricting the deflection of the elastic wall and moving the second member in the direction of the rotation axis. is configured to be regulated.

According to the present invention, by pushing and pulling the second member with respect to the first member, the elastic wall is flexed and the uneven portions overcome each other, so that the second member can be moved. The protrusion amount of the part can be adjusted. By relatively rotating the first member and the second member and introducing the elastic wall between the fixed wall and the deflection restricting wall, the deflection of the elastic wall is restricted, so that the movement of the second member is prevented. By being regulated, the amount of protrusion of the cushion portion with respect to the fixed portion can be fixed. Therefore, it is possible to adjust the amount of projection of the cushion portion with respect to the fixing portion and to fix the position of the cushion portion with only the two parts of the first member and the second member, and the number of parts can be reduced.

1 is an exploded perspective view showing an embodiment of a cushioning device according to the present invention; FIG. It is a top view of the 1st member which comprises the same cushion apparatus. It is a perspective view of the 2nd member which comprises the same cushion apparatus. It is a top view of the 2nd member which comprises the same cushion apparatus. FIG. 4 is a perspective view of the cushion device in a state in which the first member and the second member are temporarily held; 6 is a perspective view of a state in which the second member is pushed and moved with respect to the first member from the state in FIG. 5; FIG. 7 is a perspective view of a state in which both members are permanently fixed by relatively rotating both members from the state of FIG. 6 ; FIG. FIG. 8 is a cross-sectional view taken along line AA in FIG. 7; FIG. 6 is a longitudinal sectional view of FIG. 5; FIG. 9 is a longitudinal sectional view of FIG. 8; FIG. 5 is an exploded perspective view showing another embodiment of the cushioning device according to the present invention; FIG. 10 is a perspective view of the cushion device in a state in which both members are relatively rotated and both members are permanently fixed. FIG. 13 is a cross-sectional view taken along line BB in FIG. 12; FIG. 5 is an exploded perspective view showing still another embodiment of the cushioning device according to the present invention; It is a perspective view of the 1st member which comprises the same cushion apparatus. FIG. 10 is a perspective view of the cushion device in a state in which both members are relatively rotated and both members are permanently fixed. FIG. 17 is a cross-sectional view along the DD arrow line of FIG. 16;

An embodiment of a cushioning device according to the present invention will be described below with reference to FIGS. 1 to 10. FIG.

As shown in FIGS. 1 and 10, the cushion device 10 is arranged between a fixed member 1 and a movable member 5 that moves toward and away from the fixed member 1, and the movable member 5 moves toward and away from the fixed member 1. It is for suppressing the impact when it collides with the fixed member 1 . Further, the fixing member 1 is formed with a fixing hole 3 having a substantially circular hole shape and provided with notches 3a, 3a at locations opposed to each other in the circumferential direction.

Examples of the fixed member 1 include a vehicle body panel, a vehicle body frame, and a glove box box. , bonnets and the like.

As shown in FIG. 1, the cushion device 10 of this embodiment includes a first member 11 having a fixing portion 20 fixed to the fixing member 1 and a supporting portion 30, and a rotating portion of the first member 11 to the supporting portion 30. A second member 12 assembled so as to be movable and movable in the direction of its rotation axis, a cushion portion 13 attached to the two members 12, and an annular ring attached to the first member 11. It is composed of a seal ring 14 having a shape. In addition, in the case of this embodiment, the "rotation axis direction" in the present invention means the direction along the rotation axis C (see FIG. 1) of the second member 12 rotating with respect to the first member 11. do.

First, the first member 11 is described. The first member 11 of this embodiment has a fixing portion 20 fixed to the fixing member 1 and a support portion 30 extending from the fixing portion 20 toward the second member 12 . The fixing portion 20 includes a tubular portion 21 having a substantially cylindrical shape, and a pair of engaging portions 23, 23 which are flexibly formed at locations on the outer circumference of the tubular portion 21 facing each other in the circumferential direction, A pair of rotation restricting portions 24 , 24 are arranged on the outer circumference of the cylindrical portion 21 and perpendicular to the pair of engaging portions 23 , 23 . Then, with the seal ring 14 attached to the outer periphery of the tubular portion 21, the pair of rotation restricting portions 24, 24 are aligned with the pair of notches 3a, 3a of the fixing hole 3, and the tubular portion 21 is inserted into the fixing hole 3. 9 and 10, the seal ring 14 comes into contact with the front peripheral edge of the fixing hole 3, and the pair of rotation restricting portions 24, 24 enter the pair of notches 3a, 3a. While the rotation of the fixing portion 20 is restricted by , the pair of engaging portions 23 and 24 are engaged with the rear peripheral edge of the fixing hole 3 so that the fixing portion 20 is fixed to the fixing member 1 .

The fixed portion may be composed of, for example, a columnar stem portion and a pair of locking pieces extending like anchors from the tip of the stem portion, or a stud bolt may be provided on the fixed member side, A structure for fixing to this stud bolt may be used, and the shape and structure are not limited to those described above.

Further, as shown in FIG. 1, the support portion 30 includes a substantially disk-shaped base portion 31 connected to the fixing portion 20 and a front side of the base portion 31 (the side facing the second member 12). It has a pair of flexible elastic walls 40, 40 extending from two outer peripheral edge portions facing each other in the circumferential direction toward the second member 12 side by a predetermined length. The center of the base 31 coincides with the rotation axis C of the second member 12 , and the rotation axis C also serves as the axis of the first member 11 passing through the center of the base 31 . As shown in FIG. 2, each elastic wall 40 is erected with a predetermined width along the circumferential direction of the base portion 31 . Further, each elastic wall 40 is flexurally deformable radially outwardly or radially inwardly of the base portion 31 . In other words, each elastic wall 40 is flexurally deformed in a direction toward or away from the rotation axis C, which is the axis of the first member 11 .

As shown in FIGS. 7 and 8, the elastic wall 40 is introduced between the fixed wall 50 of the second member 12 and the deflection regulating wall 60, and is arranged adjacent to the outside of the fixed wall 50. It is also arranged adjacent to the inner side of the deflection control wall 60 .

Further, as shown in FIG. 1, the inner side of each elastic wall 40 (the side facing the rotation axis C and facing the fixed wall 50 of the second member 12) and the leading end side in the extending direction A first uneven portion 70 having a screw groove shape in which a plurality of uneven portions are arranged at predetermined intervals in the axial direction is formed in each.

As shown in FIGS. 5 and 6 , the first uneven portion 70 of the first member 11 is fitted with the second uneven portion 75 of the second member 12 so that the axial direction of the second member 12 with respect to the first member 11 is adjusted. It is for regulating movement. This will be explained in detail later.

As shown in FIGS. 1 and 2, the outer side of each elastic wall 40 (the side opposite to the side facing the rotation axis C) and one circumferential side portion of the elastic wall 40 extends. Engagement stepped portions 41 each having an elongated step shape are provided to protrude along the extending direction. Further, as shown in FIG. 1, a pair of protrusions 43, 43 extending in a predetermined length along the circumferential direction are provided on the outer surface side of each engaging stepped portion 41 and at the end on the second member 12 side. They are arranged side by side at predetermined intervals in the axial direction.

Next, the second member 12 will be explained. The second member 12 is assembled rotatably with respect to the support portion 30 of the first member 11 and movable in a direction along the rotation axis C thereof. It has a cushion part 13 at the bottom.

More specifically, as shown in FIGS. 1, 3, and 4, the second member 12 of this embodiment includes a substantially disk-shaped base portion 15 and a back side of the base portion 15 (first and a substantially cylindrical fixed wall 50 extending toward the first member 11 from a slightly inner side of the outer peripheral edge of the side facing the member 11 . The fixed wall 50 is arranged adjacent to the inner side of the elastic wall 40 to restrict the radially inward deflection of the elastic wall 40 .

A cushion mounting projection 16 having a plurality of ridges formed on the outer circumference protrudes from the front side of the base portion 15 (the side opposite to the side facing the first member 11). A cushion portion 13 made of an elastic member such as rubber is attached to the outer periphery of the cushion attachment projection 16 .

Furthermore, as shown in FIGS. 3 and 4, the second member 12 is provided with a pair of deflection control walls 60, 60. As shown in FIG. The pair of deflection regulating walls 60, 60 includes protruding portions 61, 61 protruding in a direction orthogonal to the tangential direction of the fixed wall 50 from two outer peripheral surfaces of the fixed wall 50 facing each other in the circumferential direction, A pressing portion 63 extends from the tips of the projecting portions 61 in the projecting direction so as to separate from each other along the circumferential direction of the fixed wall 50 at a predetermined distance from the outer peripheral surface of the fixed wall 50. , 63. 1 and 6, each protruding portion 61 is connected at its base end portion (upper end portion in FIG. 1) to the base portion 15, and is connected to the extending direction tip portion of the fixed wall 50 (see FIG. 1). 1), extending slightly to the front side.

Further, as shown in FIGS. 1 and 3, substantially strip-shaped extending pieces 65, 65 extend from the leading ends of the pair of pressing portions 63, 63 in the extending direction. Engaging portions 67, 67 are protruded inside the 65, 65. As shown in FIG. When both members 11 and 12 rotate relative to each other and the elastic wall 40 is introduced between the fixed wall 50 and the deflection regulating wall 60, the engaging portion 67 is formed as shown in FIGS. The second member 12 is engaged with the other circumferential side portion of the engagement stepped portion 41 of the elastic wall 40 to prevent rotation of the second member 12 with respect to the first member 11 .

Further, as shown in FIGS. 1 and 3, projecting portions 61 of the deflection restricting walls 60, 60 outside the substantially cylindrical fixed wall 50 (on the side facing the elastic wall 40 of the first member 11) , 61, there are formed second concave/convex portions 75 in the form of screw grooves in which a plurality of concave/convex portions are arranged at predetermined intervals in the axial direction. Each second concave-convex portion 75 extends from the base portion 15 of the second member 12 to the inner side of the elastic wall 40 in a range slightly forward of the extending direction tip portion (lower end portion in FIG. 1) of the fixed wall 50 . It is formed so as to extend longer in the circumferential direction than the formed first uneven portion 70 .

Then, as shown in FIG. 9, the first concave-convex portion 70 inside the elastic wall 40 and the second concave-convex portion 75 outside the fixed wall 50 are concave-convex-fitted with each other, and the elastic wall 40 is connected to the deflection regulating wall 60. In the state where it is not inside, the second member 12 is pushed into the first member 11 (both members 11 and 12 are relatively moved in the direction in which the cushion portion 13 approaches the fixed portion 20), or the second member 12 is moved. When the second member 12 is lifted from the first member 11 (both members 11 and 12 are relatively moved in the direction in which the cushion portion 13 separates from the fixed portion 20), the elastic wall 40 is bent outward (see FIG. 9). (see arrows), the uneven portions 70 and 75 can ride over each other and move relative to each other in the direction along the rotational axis C of the second member 12 (see FIG. 6).

Moreover, as shown in FIGS. 5 and 6, in a state in which the first concave-convex portion 70 of the first member 11 and the second concave-convex portion 75 of the second member 12 are engaged with each other, as shown in FIGS. Furthermore, when both members 11 and 12 are relatively rotated to introduce the elastic wall 40 between the fixed wall 50 and the deflection restricting wall 60, the deflection restricting wall 60 is arranged adjacent to the outside of the elastic wall 40. The radially outward deflection of the elastic wall 40 is restricted. Further, since the fixed wall 50 is arranged inside the elastic wall 40 , the elastic wall 40 is also restricted from bending inward in the radial direction. As a result, the engagement between the first uneven portion 70 of the elastic wall 40 and the second uneven portion 75 of the fixed wall 50 is maintained, and the movement of the second member 12 along the rotation axis C is locked. Thus, the projection height of the cushion device 10 with respect to the fixed member 1 can be fixed. The pair of ridges 43, 43 formed on the outer surface side of the engagement stepped portion 41 of each elastic wall 40 are arranged so that when the elastic wall 40 is introduced between the fixed wall 50 and the deflection restricting wall 60, As shown in FIG. 7, the second member 12 is pressed against the inner side of the deflection restricting wall 60 to prevent the second member 12 from rattling.

Further, in this embodiment, the first concave-convex portion 70 and the second concave-convex portion 75 having a thread groove shape rotate the first member 11 and the second member 12 relative to each other as indicated by arrows in FIG. , when the elastic wall 40 is introduced between the fixed wall 50 and the deflection regulating wall 60, the cushion portion 13 is moved in a projecting direction with respect to the fixed portion 20 of the first member 11. . In this embodiment, as shown in FIG. 10, the cushion portion 13 can be protruded by a predetermined protrusion amount H with respect to the fixed portion 20 of the first member 11 .

Further, as shown in FIGS. 1 and 3, a substantially U-shaped portion is provided outside the distal end portion of the fixed wall 50 in the extending direction and aligned with the circumferential range in which the second concave-convex portion 75 is provided. A bendable engagement piece 51 is formed through a shaped slit 51a. An engaging portion 52 protrudes from the outside of each engaging piece 51 on the free end side. A tapered surface 52 a whose height gradually decreases toward the free end side of the engaging piece 51 is formed on the outer surface of the engaging portion 52 .

5 and 6, the engaging portion 52 is formed by assembling the first member 11 and the second member 12 (hereinafter referred to as "both members 11 and 12") so that the elastic wall 40 is When not introduced between the fixed wall 50 and the deflection regulating wall 60 , the tapered surface 52 a engages with the inner surface side of the elastic wall 40 on one side in the circumferential direction, and is the first member 11 with respect to the first member 11 . The two members 12 are temporarily held so as not to rotate unless a predetermined rotational force is applied. 7 and 8, when the elastic wall 40 is introduced between the fixed wall 50 and the deflection restricting wall 60 by relatively rotating both members 11 and 12, the engaging portion 52 , engages with the inner surface side of the other circumferential side portion of the elastic wall 40 to prevent rotation of the second member 12 with respect to the first member 11 .

That is, in this embodiment, when both members 11 and 12 are relatively rotated and the elastic wall 40 is introduced between the fixed wall 50 and the deflection restricting wall 60, the elastic wall 40 is elastically deformed as shown in FIGS. The engaging portion 67 provided on the deflection restricting wall 60 engages with the other circumferential side portion of the engaging stepped portion 41 provided on the outer surface side of the wall 40 , and the other circumferential side portion on the inner surface side of the elastic wall 40 is engaged. An engaging portion 52 provided on the fixed wall 50 engages with the portion to restrict the relative rotation between the first member 11 and the second member 12 . are provided with the "engagement portion" in the present invention.

Moreover, the shape and structure of the first member and the second member are not limited to the above modes. Furthermore, in the above embodiment, the fixed portion 20 of the first member 11 is fixed to the fixed member 1 side, but the fixed portion 20 of the first member 11 is fixed to the moving member 5 (see FIG. 10). , the cushion device 10 may be attached to the moving member 5 . The elastic wall 40 is provided on the first member 11 side, and the fixed wall 50 and the deflection control wall 60 are provided on the second member 12 side. An elastic wall may be provided on the side. Furthermore, the fixed wall 50 is arranged adjacent to the inner side of the elastic wall 40, and the deflection control wall 60 is arranged adjacent to the outer side of the elastic wall 40. You may arrange|position a control wall adjacently. Also, the "engagement portion" in the present invention may be provided on either the fixed wall or the deflection control wall.

Next, an example of a method of using the cushion device 10 having the above configuration and its effects will be described.

When assembling the first member 11 and the second member 12, as shown in FIG. The second member 12 is pushed into the first member 11 in a state in which the second member 12 is generally aligned with one side portion in the circumferential direction of the . Then, the first concave-convex portion 70 and the second concave-convex portion 75 are engaged with each other, and the second member 12 is assembled to the first member 11 as shown in FIG. In this state, the tapered surface 52a of the engaging portion 52 of the engaging piece 51 provided on the second member 12 side engages with the inner surface side of the elastic wall 40 on one side in the circumferential direction, and the first member 11 is engaged. On the other hand, the second member 12 is temporarily held. By inserting the cylindrical portion 21 with the seal ring 14 mounted thereon into the fixing hole 3 in this state, as shown in FIGS. The rotation restricting portions 24, 24 enter the pair of cutouts 3a, 3a to restrict the rotation of the fixing portion 20, and the pair of engaging portions 23, 24 engage with the back side peripheral edge of the fixing hole 3, and the fixing member A fixing portion 20 is fixed to 1 .

In this state, when the moving member 5 is brought close to the fixed member 1, the moving member 5 presses the cushion portion 13, and the second member 12 is pressed via the cushion portion 13. The second concave-convex portion 75 on the first member 11 side pushes the first concave-convex portion 75 on the first member 11 side from the inside to bend the elastic wall 40 outward as shown by the arrow in FIG. climb over each other, and both uneven portions 70 and 75 are engaged stepwise like a latch groove structure, thereby lowering the height of the cushion portion 13 and rotating the second member 12 along its rotation axis C. move in that direction. Then, as shown in FIG. 10, when the movable member 5 comes closest to the fixed member 1 and the movement of the movable member 5 is completed, the concave-convex fitting of the concave-convex portions 70 and 75 causes the cushion to be held at that position. The height of the portion 13 is maintained (see dashed line in FIG. 10).

In this state, after the moving member 5 is separated from the fixed member 1, the second member 12 is rotated with respect to the first member 11 as indicated by the arrow in FIG. is pressed against the inner surface of the elastic wall 40, the engaging piece 51 bends inward in the radial direction of the fixed wall 50, and the cushion portion 13 and the fixed portion 20 The second member 12 rotates while gradually protruding with respect to . 7 and 8, when the elastic wall 40 is introduced between the fixed wall 50 and the deflection restricting wall 60, the deflection restricting wall 60 is arranged adjacent to the outside of the elastic wall 40. , the radially outward deflection of the elastic wall 40 is restricted, and the movement of the second member 12 in the direction along the rotation axis C is restricted. At the same time, the engaging portion 67 provided on the deflection restricting wall 60 is engaged with the other circumferential side portion of the engaging stepped portion 41 on the outer surface side of the elastic wall 40 , and the inner surface side of the elastic wall 40 is engaged on the other circumferential side. The engaging portion 52 provided on the fixed wall 50 engages with the portion to restrict the relative rotation between the first member 11 and the second member 12, and furthermore, as shown by the solid line in FIG. , the amount of protrusion from the fixed portion 20 is fixed.

As described above, in the cushion device 10, by pushing and pulling the second member 12 with respect to the first member 11, the elastic wall 40 is flexed so that the uneven portions 70 and 75 ride over each other and the second member 12 can be moved in the direction along the rotation axis C, the second member 12 can be moved to the second position by bringing the moving member 5 as close as possible to the fixed member 1 and pressing the cushion part 13 . It is possible to adjust the amount of projection of the cushion part 13 with respect to the fixed part 20 by pushing it into the 1 member 11 . In this state, the first member 11 and the second member 12 are relatively rotated to introduce the elastic wall 40 between the fixed wall 50 and the deflection restricting wall 60, thereby restricting the deflection of the elastic wall 40. Therefore, the movement of the second member 12 is restricted, and the projection amount of the cushion portion 13 with respect to the fixed portion 20 can be fixed. Therefore, in the cushion device 10, the projection amount of the cushion portion 13 with respect to the fixed portion 20 can be adjusted and the position can be fixed using only the two parts of the first member 11 and the second member 12, and the number of parts can be reduced. can do.

Further, in this embodiment, both the uneven portions 70 and 75 relatively rotate the first member 11 and the second member 12 to introduce the elastic wall 40 between the fixed wall 50 and the deflection restricting wall 60. In some cases, it forms a screw groove for moving the cushion portion 13 in a projecting direction with respect to the fixed portion 20 . According to this aspect, as shown in FIG. 10, the second member 12 is pushed into the first member 11 by bringing the moving member 5 as close as possible to the fixed member 1 and pressing the cushion portion 13. After adjusting the projection amount of the cushion portion 13 with respect to the fixed portion 20, the elastic wall 40 is introduced between the fixed wall 50 and the deflection control wall 60 by relatively rotating the first member 11 and the second member 12. By doing so, the amount of projection can be fixed while the cushion portion 13 slightly protrudes from the fixing portion 20 . Therefore, as shown in FIG. 10, in a state in which the movable member 5 is maximally close to the fixed member 1, the reaction force R can be applied to the movable member 5 by the cushion portion 13. The rattling of the moving member 5 with respect to the member 1 can be suppressed.

Furthermore, in this embodiment, the first member 11 and the second member 12 are rotated relative to the fixed wall 50 and the deflection restricting wall 60 to move the elastic wall 40 between the fixed wall 50 and the deflection restricting wall 60 . As shown in FIGS. 7 and 8, engaging portions (here, engaging portion 67 and engaging portion 52) that engage with the outer surface side and the inner surface side of the elastic wall 40 when introduced are provided. Therefore, when the elastic wall 40 is introduced between the fixed wall 50 and the deflection regulating wall 60, the engaging portions 67 and 52 engage with the outer surface side and the inner surface side of the elastic wall 40, respectively, thereby Since 12 detents are provided, the elastic wall 40 can be reliably maintained in a state where the elastic wall 40 is introduced between the fixed wall 50 and the deflection restricting wall 60 and the deflection is restricted.

Further, in this embodiment, as shown in FIGS. 5 to 8, the fixed wall 50 is arranged inside the elastic wall 40, and the deflection control wall 60 is arranged outside the elastic wall 40, so that the deflection control wall 60 can be formed relatively large, making it easier to grasp the deflection restricting wall 60 and making it easier to rotate the first member 11 and the second member 12 .

Figures 11-13 show another embodiment of the cushioning device according to the invention. In addition, the same code|symbol is attached|subjected to the substantially same part as the said embodiment, and the description is abbreviate|omitted.

The cushion device 10A of this embodiment has a structure in which a fixed wall 50 and a deflection control wall 60 are provided on the first member 11A side, and an elastic wall 40 is provided on the second member 12A side. The first member 11 and the second member 12 of the cushion device 10A of the above-described embodiment are reversed in the members provided with the fixed wall 50, the deflection control wall 60, and the elastic wall 40. As shown in FIG.

More specifically, as shown in FIG. 11, the support portion 30A that constitutes the first member 11A extends from slightly inside the outer peripheral edge portion on the front side of the base portion 31 toward the second member 12A side. It is composed of a substantially cylindrical fixed wall 50 and a pair of deflection control walls 60 , 60 . The fixed wall 50 is arranged adjacent to the inner side of the elastic wall 40, and the deflection control wall 60 is arranged adjacent to the outer side of the elastic wall 40 (see FIG. 13). The protruding portion 61 of each deflection restricting wall 60 is connected to the base portion 31 at its base end portion. On the other hand, as shown in FIG. 11, the second member 12A has a pair of elastic walls 40, 40 extending from the outer peripheral edge on the back side of the base 15 toward the first member 11A.

Also in the cushion device 10A of this embodiment, as in the above-described embodiment, by pushing and pulling the second member 12A against the first member 11A, the elastic wall 40 is flexed and the uneven portions 70 and 75 climb over each other. , the second member 12A can be moved in the direction along the rotation axis C, and the projection amount of the cushion portion 13 with respect to the fixed portion 20 can be adjusted. Then, as shown in FIG. 12, the first member 11A and the second member 12A are relatively rotated to introduce the elastic wall 40 between the fixed wall 50 and the deflection control wall 60 as shown in FIG. As a result, the bending of the elastic wall 40 is restricted, so that the movement of the second member 12A is restricted, and the projection amount of the cushion portion 13 with respect to the fixing portion 20 can be fixed. Therefore, it is possible to adjust the amount of protrusion of the cushion portion 13 with respect to the fixing portion 20 and to fix the position of the cushion portion 13 with only the two parts of the first member 11A and the second member 12A, thereby reducing the number of parts. In addition, other effects of the above-described embodiment can be similarly obtained.

Figures 14-17 show yet another embodiment of a cushioning device according to the invention. In addition, the same code|symbol is attached|subjected to the substantially same part as the said embodiment, and the description is abbreviate|omitted.

The cushion device 10B of this embodiment differs from the above embodiment in the positional relationship of the fixed wall 50B and the deflection control wall 60B with respect to the elastic wall 40B. As shown in FIGS. 14 and 15, the support portion 30B of the first member 11B has a substantially cylindrical shape extending from the outer peripheral edge portion of the substantially disk-shaped base portion 31 toward the second member 12B. and a pair of deflection regulating walls 60B, 60B provided at two circumferentially opposite locations on the inner circumference of the distal end portion of the fixed wall 50B in the extending direction. . As shown in FIG. 17, the fixed wall 50B is arranged adjacent to the outer side of the elastic wall 40B to restrict the radially outward deflection of the elastic wall 40B. It is arranged adjacent to the inner side of the elastic wall 40B and regulates the radially inward deflection of the elastic wall 40B.

Further, a first concave-convex portion 70 having a screw groove shape is formed on the inner circumference of the fixed wall 50B. Further, a pair of engaging portions 52B, 52B are protruded between the pair of deflection control walls 60B, 60B on the inner circumference of the extension direction tip portion of the fixed wall 50B. A tapered surface 52a is formed on the outer surface of each engaging portion 52B. When the elastic wall 40B is not introduced between the fixed wall 50B and the deflection regulating wall 60B, the engaging portion 52B engages the elastic wall 40B with the tapered surface 52a, thereby to temporarily hold the second member 12 . Further, as shown in FIG. 16, when both members 11B and 12B rotate relative to each other and the elastic wall 40B is introduced between the fixed wall 50B and the deflection restricting wall 60B, the engaging portion 52B is shown in FIG. As shown, the second member 12B is engaged with the engaging projection 45 of the elastic wall 40B to prevent rotation of the second member 12B with respect to the first member 11B.

On the other hand, as shown in FIG. 14, the second member 12B has a pair of elastic walls 40B, 40B extending from the outer peripheral edge on the back side of the base 15 toward the first member 11B. A second concave-convex portion 75 having a thread groove shape is formed on the outer side of the distal end portion in the extending direction of each elastic wall 40B. In addition, an engaging protrusion 45 is provided on one side in the circumferential direction of each elastic wall 40B in the middle of the extending direction. 17, when the elastic wall 40B is introduced between the fixed wall 50B and the deflection restricting wall 60B due to relative rotation of both the members 11B and 12B, the engaging projection 45 engages the fixed wall 50B. engages with the engaging portion 52B to restrict the rotation of both members 11B and 12B.

In this embodiment, as shown in FIG. 14, the second member 12B is pushed into the first member 11B so that the pair of elastic walls 40B, 40B of the second member 12B are fixed to the fixed wall of the first member 11B. 50B, the concave-convex portions 70 and 75 are engaged with each other. can be adjusted. From this state, by relatively rotating both members 11B and 12B, the elastic wall 40B of the second member 12B is introduced between the fixed wall 50B of the first member 11B and the deflection restricting wall 60B, and the elastic wall 40B is regulated and the amount of protrusion of the cushion section 13 from the fixed section 20 can be fixed in a state where the rotation of both members 11B and 12B is regulated. Therefore, it is possible to adjust the amount of protrusion of the cushion portion 13 with respect to the fixed portion 20 and to fix the position of the cushion portion 13 with only the two parts of the first member 11B and the second member 12B, thereby reducing the number of parts. In addition, other effects of the above-described embodiment can be similarly obtained.

The present invention is not limited to the above-described embodiments, and various modified embodiments are possible within the scope of the present invention, and such embodiments are also included in the scope of the present invention. .

1 Fixed member 5 Moving member 10, 10A, 10B Cushion device 11, 11A, 11B First member 12, 12A, 12B Second member 13 Cushion part 14 Seal ring 20 Fixed part 30, 30A, 30B Support part 40, 40B Elastic wall 50, 50B Fixed walls 52, 52B Engagement portions 60, 60B Regulating wall 67 Engagement portion 70 First uneven portion 75 Second uneven portion C Rotation axis

Claims (4)

A cushion device disposed between a fixed member and a moving member that moves toward and away from the fixed member to suppress an impact when the moving member collides with the fixed member. ,
a first member having a fixed portion fixed to one of the fixed member and the movable member, and a support portion extending from the fixed portion toward the other member of the fixed member and the movable member; ,
a second member rotatably and movably assembled to the support portion of the first member in the direction of the rotation axis thereof, and having a cushion portion at an end facing the other member; cage,
One of the first member or the second member is provided with a flexible elastic wall,
The other of the first member and the second member is provided with a fixed wall arranged adjacent to the inner side or the outer side of the elastic wall,
The surfaces of the elastic wall and the fixed wall facing each other are provided with concave and convex portions that are arranged at predetermined intervals in the axial direction and are fitted to each other. It is possible to move the second member in the direction of the rotation axis by getting over each other,
The first member or the second member on which the fixed wall is formed is provided with a deflection restricting wall arranged adjacent to the outside or the inside of the elastic wall. By relatively rotating the member and introducing the elastic wall between the fixed wall and the deflection restricting wall, the deflection of the elastic wall is restricted, and the second member moves toward the rotation axis. A cushion device characterized in that it is constructed such that the movement of the When the first member and the second member are relatively rotated and the elastic wall is introduced between the fixed wall and the deflection regulating wall, the concave-convex portion moves the cushion portion to the fixed portion. 2. The cushioning device according to claim 1, which has a thread groove for moving in a projecting direction. When the first member and the second member are relatively rotated to introduce the elastic wall between the fixed wall and the deflection restricting wall, the elastic wall is formed between the fixed wall and the deflection restricting wall. 3. The cushioning device according to claim 1, further comprising engaging portions for engaging the outer surface side and the inner surface side of the wall. The cushion device according to any one of claims 1 to 3, wherein the fixed wall is arranged inside the elastic wall, and the deflection control wall is arranged outside the elastic wall.

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