JP2012149698A - Collar member, shock absorber and metallic cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a collar member constituting a shock absorber, in which desired damping property can be stably obtained, and to provide a shock absorber and a metallic cover to be mounted by using the shock absorber.SOLUTION: The collar member includes: a bolt hole 40 inside the diameter thereof to allow a mounting bolt 42 to be inserted; and a fitting recess 33 outside composed of flanges 31a, 32a, which pinch and hold a collar member mounting part 53 on both sides in an insertion direction of the mounting bolt 42. The collar member is constituted by assembling an upper collar member 31 and a lower collar member 32 including the flanges 31a, 32a, respectively, for pinching an object on both sides in the insertion direction. A bottom face 31ba in a thick part of the upper collar member 31 and an upper face 32ba in a thick part of the lower collar member 32 are opposed to each other so as to keep a gap between the flanges 31a, 32a for pinching an object on both sides in the insertion direction.

Description

  The present invention relates to a collar member that constitutes a shock absorber used for mounting a cover, a housing, or the like on a member that generates vibration, and more specifically, covers such as a heat insulator. The present invention relates to a collar member that constitutes a shock absorber used for attaching the engine to an exhaust manifold (hereinafter referred to as “exhaust manifold”) of an internal combustion engine, the shock absorber itself, and a metal cover that is attached using the shock absorber.

  For example, as shown in FIG. 11, the exhaust manifold 1 attached to the side surface of the engine 2 vibrates itself because combustion exhaust gas pulsating in pressure and temperature passes through the inside according to the driving of the engine. , Generate vibration noise. Further, the exhaust manifold 1 is heated by high-temperature combustion exhaust gas passing through the interior, and the exhaust manifold 1 itself generates heat. As described above, the heat insulator 3 is attached so as to cover the exhaust manifold 1 in order to prevent the vibration sound and heat generated from the exhaust manifold 1 from propagating to the periphery of the engine 2.

  However, when the heat insulator 3 is directly attached to the vibrating exhaust manifold 1 or the engine 2, the heat insulator 3 resonates and the heat insulator 3 itself becomes a vibration source, which may increase noise.

  Therefore, Patent Document 1 proposes a shock absorber 5 having a floating mount structure for attaching the heat insulator 3 to the exhaust manifold 1 of the engine 2 as described above (see FIG. 43). FIG. 43 shows a cross-sectional view of the shock absorber 5 in the following patent document.

  The prior art shock absorber 5 includes an annular buffer member 8 formed by knitting metal fibers in a mesh shape and forming it into a flat mat shape, and an annular coupling member having a substantially S-shaped cross section. The grommet 20 includes a collar member 10 disposed between a mounting bolt 42 for mounting the shock absorber 5 to the exhaust manifold 1 and the shock absorber 8.

  A gap 17 in the axial direction and radial direction of the mounting bolt 42 is formed between the collar member 10 and the buffer member 8. It is said that the gap 17 suppresses the vibration input from the exhaust manifold 1 from being transmitted from the collar member 10 to the buffer member 8, that is, has excellent vibration damping properties.

  However, if the mounting bolt 42 is excessively screwed in order to increase the fastening force by the mounting bolt 42, the flange portion 10 a that protrudes radially outward in the collar member 10 is crushed by the bolt head 42 a of the mounting bolt 42. Due to deformation to the buffer member 8 side, the axial gap 17 formed between the collar member 10 and the buffer member 8 cannot be secured, that is, the holding state of the buffer member 8 by the flange portion 10a of the collar member 10 changes. For this reason, there is a possibility that a desired vibration damping property cannot be obtained.

Japanese Patent Laid-Open No. 2004-360596

  An object of this invention is to provide the collar member which comprises the buffering device which can obtain desired damping property stably, a buffering device, and the metal cover attached using the said buffering device.

  This invention arrange | positions between the vibration object member which is a vibration source, and the connection object member which is a connection object, and fastens the said vibration object member and the said connection object member to the said vibration object member with a fastening member. And a buffer device for buffering vibration transmission from the vibration target member to the connection target member together with the buffer member for buffering vibration and a coupling member for coupling the buffer member and the connection target member. A collar member interposed between the fastening member and the buffer member, the collar member having a fastening member insertion portion that allows insertion of the fastening member on a radially inner side, and the collar from both sides in the insertion direction of the fastening member. A shock-absorbing member holding portion constituted by a flange portion that sandwiches and holds the member mounting portion is provided on the outer diameter side, and the flange portion that sandwiches from both sides in the insertion direction is provided. Constructed by assembling the flange component comprising, respectively, and further comprising a space holding means for holding the distance between the flange portions sandwiched from both sides in the insertion direction.

  The connection target member may be a heat insulator that is connected to and covers the engine body, an exhaust pipe, a catalyst portion, or the like, or an under cover or a mission cover that covers the bottom of the vehicle body.

  The vibration target member can be, for example, an engine body such as an automobile, an exhaust pipe (particularly an exhaust manifold) or a catalyst portion in a portion mounted on the engine, a frame constituting a vehicle body, or the like.

The coupling member may be a so-called grommet.
The fastening member can be, for example, a member such as a bolt or nut for screwing the vibration target member and the collar member, or a caulking jig by caulking.

  The buffer member is a buffer member made of a steel wire formed in a predetermined shape, a buffer member composed of a flat plate having elasticity, a buffer member formed by meshing metal fibers into a mesh shape, or a steel plate It can be set as the buffer member which has desired elasticity, such as the buffer member knitted in the shape of a net.

  The flange component part comprises the fastening member insertion portion, a thick ring portion having an appropriate thickness in the radial direction, and a disk-shaped flange projecting radially outward from one of the upper and lower ends of the thick ring portion Like two flange parts that have a substantially L-shaped cross section with each other, the two parts that integrally form part of the fastening member insertion part and the flange part are opposed to each other in the insertion direction of the fastening member. The collar member is assembled by assembling the component part constituting the collar member, or the first part integrally comprising the fastening member insertion part and the flange part, and the second part comprising only the flange part. It can be a component or the like.

  The interval holding means is constituted by a part of the flange component parts, and is constituted by an interval holding means that works by assembling the flange component parts, or a separate part from the flange component parts, and the flange component parts are assembled together. In addition, it is possible to provide an interval holding means for mounting after constituting the collar member.

According to the present invention, it is possible to form a collar member that constitutes a shock absorber capable of stably obtaining desired vibration damping properties.
More specifically, a shock-absorbing member holding portion that includes a fastening member insertion portion that allows the insertion of the fastening member inside the diameter and that includes a flange portion that sandwiches and holds the collar member mounting portion from both sides in the insertion direction of the fastening member. A gap holding means for holding a gap between the flange portions sandwiched from both sides in the insertion direction, and comprising flange components including each of the flange portions sandwiched from both sides in the insertion direction. By providing, the relative relationship of the flange part inserted | pinched from the both sides in the insertion direction of the said fastening member and the said collar member mounting part can be hold | maintained reliably.

  Therefore, for example, a gap is provided between the flange portion and the collar member mounting portion to improve vibration damping, or the flange portion and the collar member are mounted to prevent the buffer member from fluttering in the buffer member holding portion. Even when the parts are brought into close contact with each other, the gap holding means can reliably hold the desired relative relationship between the flange part and the collar member mounting part. Therefore, by using the collar member, the holding state of the color member mounting portion in the buffer member holding portion can be ensured, and a shock absorber having a desired vibration damping property can be configured by a reliable holding state.

  As an aspect of the present invention, each of the flange component parts includes an orthogonal surface in a direction orthogonal to the insertion direction, and the interval holding unit faces the flange component parts in a state of being assembled in the insertion direction. It can be composed of orthogonal planes.

  According to the present invention, the relative relationship between the flange portion sandwiched from both sides in the insertion direction of the fastening member and the collar member mounting portion can be reliably held with a simple structure. In addition, since the interval holding means is constituted by an orthogonal plane that is a part of each flange component, the number of parts can be reduced compared with the case where the interval holding means is constituted by another component, Processes and costs can be reduced.

  Further, when the interval holding means is constituted by another component, the interval holding means may drop and become unable to hold the interval. However, the interval holding means is configured by an orthogonal surface that is a part of each flange component. Therefore, the gap between the flange portions can be reliably maintained without falling off.

  As an aspect of the present invention, the orthogonal plane can be continuously formed on the outer diameter side of the fastening member insertion portion. That is, the orthogonal plane can be configured by a part on the outer diameter side of the fastening member insertion portion. Therefore, compared with the case where the orthogonal surface is formed separately from the fastening member insertion portion, the shape of the collar member can be configured simply, and the workability of the flange component can be improved.

  Moreover, as an aspect of the present invention, a nut for screwing the fastening member with a bolt implanted in the connection target member, or a bolt for screwing into a screw hole or a nut provided in the connection target member The orthogonal plane can be formed larger than the nut or the head of the bolt in the orthogonal direction.

  The nut or the head of the bolt, that is, the orthogonal surface formed larger than the bolt head has an inner diameter smaller than the outer diameter of the nut or bolt head in the orthogonal direction when the insertion direction is the vertical direction, that is, in plan view. And an orthogonal surface having a large outer diameter.

  According to the present invention, the interval can be maintained with respect to the fastening force acting from the bolt head or the nut. Specifically, by forming the orthogonal surface larger than the nut or the head of the bolt in the orthogonal direction, the fastening force by the bolt head or nut acts on the inner side of the orthogonal surface in plan view. The interval can be reliably maintained.

Further, as an aspect of the present invention, it is possible to provide a component fixing means for fixing the flange components in an assembled state.
The part fixing means can be constituted by caulking means, screwing means, spot welding or the like for caulking part of the flange components.

  According to the present invention, the flange member can be integrated with each other in a state where the orthogonal surfaces face each other to form a collar member. Therefore, the collar member which can hold | maintain the space | interval of flange parts reliably can be obtained. In addition, in the state where the flange component parts are assembled, even if an external force in the direction of separating acts, the flange component parts are integrated by the component fixing means to form the collar member. Never leave. Therefore, it is possible to reliably maintain a desired relative relationship between the flange portion and the collar member mounting portion. That is, the component fixing means can also function as an interval holding means for holding an interval against an external force in a direction in which the interval between the flange portions is separated.

  Further, the present invention includes the above-described collar member, the buffer member, and the coupling member, and the first holding that surrounds the buffer member and holds the connection target member on the outer diameter side. And a second holding part that holds the buffer member inside the diameter, and a connecting part that connects the first holding part and the second holding part, and the buffer member is mounted on the collar member. A flange that constitutes the buffer member holding part, comprising a collar member mounting part that allows the outer part at the center part in the radial direction and a held part that is held by the second holding part at a radially outer part. It is a shock absorber configured to sandwich and hold the collar member mounting portion from both sides in the insertion direction.

  The wire is a wire that is appropriately selected according to various use conditions such as the frequency band and amplitude of vibration to be suppressed, temperature under use, etc., and is round, oval, substantially rectangular, or any other closed curved surface shape. It can be set as the wire which is the cross-sectional shape.

  In addition, the buffer member made of a wire rod is, for example, a so-called spiral shape that is a two-dimensional curve in which at least a part moves away from the center as it turns in a plan view, or at least a part of the plane size increases as it moves away from the center. It is a spiral part wound in a spiral shape in a plan view, or a cylindrical shape in a side view, a truncated cone shape, and a drum shape, and is wound in a substantially cylindrical shape configured as a so-called coil spring. It can be set as the buffer member which formed the wire rods, such as a spiral shape, in various shapes.

According to the present invention, it is possible to configure a shock absorber that exhibits stable and excellent vibration damping properties.
Specifically, the first holding portion that is configured by the above-described collar member, the buffer member, and the coupling member, surrounds the buffer member, and holds the connection target member on the radially outer side. And a second holding part that holds the buffer member inside the diameter and a connecting part that connects the first holding part and the second holding part, and the buffer member is allowed to be mounted on the collar member. A flange portion constituting the buffer member holding portion, wherein the collar member mounting portion is provided at the central portion in the radial direction and the held portion held by the second holding portion is formed by a wire provided at the radially outer portion. Since the collar member mounting portion is sandwiched and held from both sides in the insertion direction, the buffer member itself made of a wire performs a bending motion due to the vibration transmitted from the collar member to the buffer member.

  Due to this bending motion, the shock absorber can convert the vibration energy of vibration transmitted from the collar member into the bending motion energy of the buffer member and suppress the vibration transmitted to the connection target member.

  In addition, the buffer member is a wire rod that includes a collar member mounting portion that allows mounting of the collar member in a central portion in the radial direction and a held portion that is held by the second holding portion in a radially outer portion. By comprising, the variation of a product is few compared with the buffer member which knitted the metal fiber in the mesh shape and formed in the mat shape. Therefore, a buffer member having stable elasticity can be configured. That is, it is possible to configure a shock absorber having stable vibration damping properties.

Further, since the above-described collar member having the interval holding means is used, the desired holding in the holding state in which the color member mounting portion provided at the radial center of the linear buffer member is held by the buffer member holding portion. The state can be ensured, and the transmission of vibration can be suppressed without collision between the buffer member and the collar member.
Thus, by setting the shock absorber to the above-described configuration, it is possible to connect the vibration target member that is the vibration source and the connection target member without transmitting vibration.

As an aspect of the present invention, a gap for improving vibration damping can be provided between the flange portion and the collar member mounting portion.
According to the present invention, it is possible to further improve the vibration damping performance in the shock absorber. Specifically, since a gap for improving damping properties is formed between the flange portion and the collar member mounting portion in a mode of sandwiching the color member mounting portion of the linear buffer member from both sides in the insertion direction, The vibration input through the collar member can be absorbed by the gap without causing a collision sound in the fitting recess between the collar member mounting portion and the flange portion. Further, the heat transfer can be blocked by the gap. In addition, since the above-described collar member is used, the interval between the flange portions is reliably held by the interval holding means, so that the damping performance can be stably improved.

  Furthermore, the present invention is a metal cover having a three-dimensional shape composed of one or a plurality of aluminum alloy plates each having a corrugated shape extending in a direction intersecting each other, wherein The corrugated shape is crushed to form a substantially flat plate shape, and either one of the directions intersecting each other is defined as a direction intersecting a main ridge line corresponding portion constituting the three-dimensional shape, and The vibration target member is configured by an internal combustion engine and / or an exhaust path thereof, and the crushing target portion is held by the first holding portion.

  According to the present invention, for example, a metal cover capable of suppressing heat dissipation and vibration transmission from an internal combustion engine such as an automobile and / or its exhaust path can be configured.

Specifically, for example, in order to attach a metal cover made of a material having an appropriate heat resistance performance with the above-described shock absorber having high vibration damping properties, heat dissipation from the internal combustion engine as a heat source and / or its exhaust path is prevented. In addition to preventing vibrations from the internal combustion engine that is also a vibration source and / or its exhaust path from being transmitted to the metal cover.
Therefore, for example, compared with the case where the metal cover itself resonates with respect to the vibration input from the vibration source, the metal cover can be attached with a high vibration damping property.

  Further, since the metal cover is composed of one or a plurality of aluminum alloy plates each having a corrugated shape extending in a direction crossing each other, a metal cover with high deformability can be configured. Therefore, for example, even in the case of an internal combustion engine having a complicated shape and / or its exhaust path, a metal cover having a shape corresponding to the shape can be formed. Further, since metal covers having shapes corresponding to those shapes can be attached, heat dissipation from the internal combustion engine and / or its exhaust path can be more reliably prevented.

  According to the present invention, it is possible to provide a collar member that constitutes a shock absorber capable of stably obtaining desired vibration damping properties, a shock absorber, and a metal cover that is attached using the shock absorber.

The perspective view from the bottom face side of a shock absorber. Explanatory drawing of a buffering device. The bottom view of a shock absorber. Explanatory drawing of a color member. Explanatory drawing of a color member. Explanatory drawing of a multistage coil spiral spring. Explanatory drawing of a multistage coil spiral spring. Explanatory drawing of a grommet. Sectional drawing about the mounting state of a shock absorber. Explanatory drawing about the corrugated board which comprises a heat insulator. The schematic front view about the mounting state of a shock absorber. Explanatory drawing about the color member of another form. Explanatory drawing about the buffering device provided with the buffer member of the 2nd Example. Explanatory drawing about the buffering device provided with the buffer member of the 2nd Example. Explanatory drawing about the buffering device provided with the buffer member of the 3rd Example. Explanatory drawing about the buffering device provided with the buffer member of the 3rd Example. Explanatory drawing about the buffering device provided with the buffer member of the 4th Example. Explanatory drawing about the buffering device provided with the buffer member of the 4th Example. Explanatory drawing about the buffering device provided with the buffer member of the 5th Example. Explanatory drawing about the buffering device provided with the buffer member of the 5th Example. Explanatory drawing about the buffering device provided with the buffer member of the 6th Example. Explanatory drawing about the buffering device provided with the buffer member of the 6th Example. Explanatory drawing about the buffering device provided with the buffer member of the 7th Example. Explanatory drawing about the buffering device provided with the buffer member of the 7th Example. Explanatory drawing about the buffering device provided with the buffer member of the 8th Example. Explanatory drawing about the buffering device provided with the buffer member of the 8th Example. Explanatory drawing about the buffering device provided with the buffer member of the 9th Example. Explanatory drawing about the buffering device provided with the buffer member of the 9th Example. Explanatory drawing about the buffering device provided with the buffer member of the 10th Example. Explanatory drawing about the buffering device provided with the buffer member of the 10th Example. Explanatory drawing about the buffering device provided with the buffer member of the 11th Example. Explanatory drawing about the buffering device provided with the buffer member of the 11th Example. Explanatory drawing about the buffering device provided with the buffer member of the 12th Example. Explanatory drawing about the buffering device provided with the buffer member of the 12th Example. Explanatory drawing about the buffering device provided with the buffer member of the 13th Example. Explanatory drawing about the buffering device provided with the buffer member of the 13th Example. Explanatory drawing about the buffering device provided with the buffer member of the 14th Example. Explanatory drawing about the buffering device provided with the buffer member of the 14th Example. Explanatory drawing about the buffering device provided with the buffer member of 15th Example. Explanatory drawing about the buffering device provided with the buffer member of 15th Example. Explanatory drawing about the buffering device provided with the buffer member of the 16th Example. Explanatory drawing about the buffering device provided with the buffer member of the 16th Example. Sectional drawing about the mounting state of the shock absorber of a prior art.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view from the bottom side of the shock absorber 10 according to the present embodiment, FIG. 2 is an explanatory view of the shock absorber 10, and FIG. 3 is a bottom view of the shock absorber 10. 2A shows a front view of the shock absorber 10, and FIG. 2B shows a cross-sectional view of the shock absorber 10.

4 and 5 are explanatory diagrams of the collar member 30, FIGS. 6 and 7 are explanatory diagrams of the spiral multi-stage coil spiral spring 50, and FIG. 8 is an explanatory diagram of the grommet 20.
4A is a plan view of the collar member 30 of the shock absorber 10, FIG. 4B is a sectional view of the collar member 30, and FIG. 4C is an exploded sectional view of the collar member 30. Show. 5A is an exploded perspective view of the collar member 30 viewed from the bottom surface side, FIG. 5B is an exploded perspective view of the collar member 30 viewed from the top surface side, and FIG. The perspective view of the collar member 30 seen from FIG.

  6A shows a bottom view of the spiral multi-stage coil spiral spring 50 of the shock absorber 10, FIG. 6B shows a front view of the spiral multi-stage coil spiral spring 50, and FIG. 7A shows a spiral multi-stage coil spring 50. A perspective view from the bottom side of the coil spiral spring 50 is shown, and FIG. 7B shows a perspective view from the bottom side of the spiral multi-stage coil spiral spring 50 whose front side is in a transparent state. 8A is a plan view of the grommet 20, FIG. 8B is a cross-sectional view of the grommet 20, and FIG. 8C is a bottom view of the grommet 20.

  9 shows a cross-sectional view of the shock absorber 10 in a mounted state, FIG. 10 shows an explanatory view of the corrugated sheet 120 constituting the heat insulator 3, and FIG. 11 shows a schematic front view of the shock absorber 10 in a mounted state. The figure is shown.

  10 (a) shows a perspective view of the corrugated sheet 120, FIG. 10 (b) shows an II end view in FIG. 10 (a), and FIG. 10 (c) shows II in FIG. 10 (a). -II end view is shown, and FIG. 10 (d) shows a III-III end view in FIG. 10 (a).

  As shown in FIG. 11, an exhaust manifold 1 for discharging combustion exhaust gas is attached to a side surface of an engine 2 of a vehicle such as an automobile. And the heat insulator 3 of the aspect which covers the exhaust manifold 1 is attached with respect to this exhaust manifold 1. As shown in FIG.

  The shock absorber 10 according to the present invention is a shock absorber having a floating mount structure for attaching the heat insulator 3 to the exhaust manifold 1, and includes a spiral multistage coil spiral spring 50, a grommet 20, and a collar member 30 that buffer vibration.

  The collar member 30 has a columnar shape with a low height relative to the diameter, and is made of an iron-based material such as SPCC. Further, as shown in FIG. 4A, the collar member 30 includes a bolt hole 40 that allows insertion of the mounting bolt 42 in the center in plan view, and a collar member of a spiral multi-stage coil spiral spring 50 described later on the side surface. A fitting recess 33 that allows fitting of the mounting portion 53 is provided.

The collar member 30 is configured by being fitted with an upper collar member 31 projecting downward and a lower collar member 32 and caulking.
Specifically, the upper collar member 31 protrudes upward from the flange portion 31a disposed on the radially outer side, the annular thick portion 31b disposed on the radially inner side of the flange portion 31a, and the inner peripheral edge of the thick portion 31b. A cylindrical fitting tube portion 31c is integrally formed. The bottom surface of the thick portion 31b is 31ba.

  The lower collar member 32 has an annular shape provided with a flange portion 32a disposed on the outer side corresponding to the flange portion 31a on the bottom surface, and a fitting opening 32c that allows fitting of the fitting tube portion 31c described above on the inner peripheral portion. The thick part 32b. In addition, the upper surface of the thick part 32b is set to 32ba. Further, the flange portions 31a and 32a are formed so as to be thinner than the thick portions 31b and 32b by the cross-sectional radius of a spiral multi-stage coil spiral spring 50 described later.

  The thick part bottom surface 31ba of the thick part 31b of the upper collar member 31 thus configured and the thick part upper surface 32ba of the thick part 32b of the lower collar member 32 face each other and inserted into the fitting opening 32c. The upper collar member 31 and the lower collar member 32 are integrated by caulking the fitting cylinder portion 31c toward the radially outer side. At this time, the flange portion 31a of the upper collar member 31 and the flange portion 32a of the lower collar member 32 have a circumferential shape in a plan view and a concave fitting from the side surface of the columnar collar member 30 toward the radially inner side. A joint recess 33 is formed.

The thick portion bottom surface 31ba of the thick portion 31b of the upper collar member 31 and the thick portion upper surface 32ba of the thick portion 32b of the lower collar member 32 are, as shown in FIG. It is formed larger than the outer diameter of the bolt head 42a.
Further, the thick portion bottom surface 31ba and the thick portion upper surface 32ba are orthogonal to the insertion direction of the mounting bolt 42 and face each other in the insertion direction.

  Further, since the fitting recess 33 is formed by facing the flange portions 31 a and 32 a formed so as to be thinner than the cross-sectional radius of the spiral multi-stage coil spiral spring 50, the fitting recess 33 is slightly higher than the cross-sectional diameter of the spiral multi-stage coil spiral spring 50. A concave portion having a circular shape in a plan view is formed.

The spiral multi-stage coil spiral spring 50 is formed by winding a circular cross-section wire, and includes a spiral spiral portion 51 on the outer diameter side and a multi-stage coil portion 52 on the inner diameter side.
Specifically, the spiral spiral part 51 gradually changes in the height direction from the radially outer side to the inner side, and the multistage coil part 52 that is continuous from the radially inner end of the spiral spiral part 51 and wound in a cylindrical shape. It is composed. With this configuration, although the spiral spiral part 51 and the multistage coil part 52 are configured by winding the same circular cross-section wire, the spring constant is different between the spiral spiral part 51 and the multistage coil part 52 because the pitch is different. Is different. In other words, the spiral multi-stage coil spiral spring 50 formed by winding one continuous circular cross-section wire by changing the winding method like a spiral spiral and a cylindrical shape has two kinds of apparent spring constants. Will have. A collar member mounting portion 53 is formed at the end of the multi-stage coil portion 52, and a held portion 54 held by the connecting portion 23 of the grommet 20 described later is provided on the radially outer portion of the spiral spiral portion 51. .

The spiral spiral portion 51 of the spiral multi-stage coil spiral spring 50 will be described in detail. The spiral spiral portion 51 gradually changes in the height direction (vertical direction in FIG. 6B) along the spiral direction, so that three spirals are formed. It is formed in a spiral shape.
Further, as described above, the spiral multi-stage coil spiral spring 50 includes the arc-shaped held portion 54 on the radially outer portion of the spiral spiral, and is continuously multi-staged from the end of the spiral spiral radial center. A coil portion 52 is formed.

  As described above, the multi-stage coil unit 52 is continuous from the end portion on the inner diameter side of the spiral spiral unit 51 and is wound with a narrow pitch and the same winding diameter in the height direction. The end portion is a collar member mounting portion 53 that is mounted in the fitting recess 33.

  The collar member mounting portion 53 and the held portion 54 are formed in an arc shape having a central angle of 270 degrees, which is 3/4 circle from the end portion, and the curvature does not change (see FIG. 6A). The inner circumferential circle of the collar member mounting portion 53 is formed with a diameter slightly larger than the inner circle 33c of the fitting recess 33 in the collar member 30 described above. Specifically, it is formed with a diameter about 0.2 mm larger. Therefore, a gap s for improving vibration damping is formed between the inner periphery of the collar member mounting portion 53 and the inner circle 33c of the fitting recess 33 (see FIG. 2 (b) enlarged view of portion a).

The spiral multistage coil spiral spring 50 is made of a wire made of stainless spring steel such as SUS304.
Further, although the spiral multi-stage coil spiral spring 50 is configured by the spiral spiral section 51 and the multi-stage coil section 52, an oval shape may be substantially used according to various use conditions such as a frequency band and amplitude of vibration to be suppressed, and a use state temperature. The wire may be rectangular or may be composed of other optional cross-section wire having a closed curved surface, and may be appropriately selected along with the diameter, material, or number of turns of the wire.

  The grommet 20 includes a first holding part 21 that holds the heat insulator 3, a second holding part 22 that holds the spiral multistage coil spiral spring 50, and a connecting part that connects the first holding part 21 and the second holding part 22. 23, and has an insertion hole 24 in the center in plan view, and is formed in an annular shape having a substantially S-shaped section.

  Specifically, the first holding portion 21 that holds the heat insulator 3 on the radially outer side has a predetermined radial length portion on the inner peripheral side from the outer peripheral edge of the annular metal plate, and extends downward from the upper side in FIG. Folded from the radially inner periphery side to the outer periphery side, it is formed in a J-shape that is inverted radially outward. In addition, the 1st holding | maintenance part 21 is formed with the thickness which pinches | interposes the heat insulator 3 mentioned later.

  Further, the second holding portion 22 that holds the spiral multi-stage coil spiral spring 50 on the inner diameter side has a predetermined radial length portion from the inner peripheral edge to the outer peripheral side of the annular metal plate from the lower side to the upper side in FIG. Folded from the radially outer periphery side to the inner periphery side, it is formed in a J-shape that is inverted radially inward.

  In addition, the 2nd holding | maintenance part 22 is formed in the thickness which pinches | interposes the above-mentioned spiral multistage coil spiral spring 50. FIG. Furthermore, a slight gap s is formed between the outer circumference of the held portion 54 of the spiral multi-stage coil spiral spring 50 and the inside of the inverted J-shaped second holding portion 22 (FIG. 2B). ) Refer to the enlarged view of part b).

  The connecting portion 23 is formed by bending over the first holding portion 21 and the second holding portion 22, and has a lower end on the inner side of the first holding portion 21 that is formed in a J-shape that is inverted radially outward. And the upper end portion outside the diameter of the second holding portion 22 formed in a J-shape inverted inwardly in the diameter. The second holding part 22, the connecting part 23, and the first holding part 21 are arranged in this order from the side of the bolt boss 41 provided on the exhaust manifold 1.

  As described above, the shock absorber 10 is configured by assembling the collar member 30, the spiral multistage coil spiral spring 50, and the grommet 20 having the above-described configuration. Specifically, the collar member 30 and the spiral multi-stage coil spiral spring 50 are assembled by fitting the collar member mounting portion 53 of the multi-stage coil portion 52 of the spiral multi-stage coil spiral spring 50 into the fitting recess 33 of the collar member 30. . At this time, as described above, a gap s is provided between the inner circle 33c of the fitting recess 33 and the inner peripheral side of the collar member mounting portion 53 of the spiral multistage coil spiral spring 50, and the color member mounting portion 53 is A range of 3/4 can be wound around the circumferential surface of the inner circle 33c.

  Further, the grommet 20 and the spiral multistage coil spiral spring 50 are assembled by fitting the held portion 54 of the spiral spiral section 51 of the spiral multistage coil spiral spring 50 to the second holding section 22 of the grommet 20. At this time, as described above, a gap s is provided between the inner peripheral surface of the second holding portion 22 of the grommet 20 and the outer periphery of the held portion 54 of the spiral multi-stage coil spiral spring 50, and the held portion 54. Is arranged in a range of 3/4 with respect to the inner peripheral surface of the second holding part 22.

  Further, as shown in FIG. 2B, the spiral multistage coil spiral spring 50 is placed between the shock absorber 10 and the collar member 30 so that the held portion 54 on the outer diameter side is higher than the collar member mounting portion 53 on the inner diameter side. Since the collar member 30 that fits the collar member mounting portion 53 in the fitting recess 33 is disposed at the second holding portion 22 that holds the held portion 54, the collar member 30 is at a high position (upward in FIG. 2B). It is assembled to become.

  As shown in FIG. 9, the shock absorber 10 configured in this way is attached to a mounting hole 3 a formed in the heat insulator 3, and is attached by a mounting bolt 42 screwed into a bolt boss 41 formed in the exhaust manifold 1. The bolt boss 41 is fixed.

  As shown in FIG. 11, the heat insulator 3 is formed so as to cover the exhaust manifold 1 attached to the side surface of the engine 2, and the shock absorber 10 against the plurality of bolt bosses 41 provided on the exhaust manifold 1. It is fixed by the mounting bolt 42 via

  As shown in FIGS. 10B and 10C, the corrugated sheet 120 has ridges 121 and valleys 122 alternately and continuously extending in the X direction, and each ridge 121 and valley in the Y direction. As shown in FIG. 10 (d), each of the heights 122 is a corrugated aluminum plate formed by repeating the top (121a, 122a) and the bottom (121b, 122b) at regular intervals.

The raised portion 121 and the valley portion 122 form the corrugated shape by alternately repeating wide and narrow at regular intervals at regular intervals in the X direction.
Specifically, in the corrugated shape of the corrugated sheet 120, the ridges 121 and the valleys 122 each extending along the Y direction are alternately repeated in the X direction.

  The ridges 121 are alternately arranged with the tops 121a and the bottoms 121b rising from the valleys 122 along the Y direction, and the valleys 122 are the tops of the flats 122a and the bottoms along the Y direction. The recesses 122b are alternately arranged.

  The top part 121a is composed of a pair of side walls that rise in a substantially inverted trapezoidal shape from the valley part 122, and a relatively flat top part that is formed by connecting the tips of the side walls to each other. The tip end portion is wider than the base end portion of the top 121a.

  The bottom part 121b is composed of a pair of side walls rising from the flat part 122a, and a concave concave part 122b in which the tips of the side walls are connected to each other. The top part 121a and the concave part 122b, and the bottom part 121b and the flat part 122a Are formed so as to be intermittently connected to each other.

  In the heat insulator 3 in which the corrugated sheet 120 is processed into a predetermined shape, the mounting hole 3a is formed at a location corresponding to the bolt boss 41 provided in the exhaust manifold 1, and the corrugated shape around the mounting hole 3a is crushed. The crushing portion 3b formed in a substantially flat plate shape is held by the first holding portion 21 of the grommet 20.

  Further, the heat insulator 3 formed in a three-dimensional shape is defined in a direction in which any one of the corrugated shapes intersecting with each other intersects with a main ridge line corresponding portion constituting the three-dimensional shape.

  More specifically, since the heat insulator 3 is formed into a three-dimensional shape that conforms to the three-dimensional appearance of the exhaust manifold 1 as described above, the heat insulator 3 has one or more ridge line corresponding portions that are bent portions. It is formed. In the present embodiment, the corrugated shape is pressed into a three-dimensional shape so that the longitudinal direction of the corrugated shape intersects the main ridge line equivalent portion of the plurality of ridge line equivalent portions.

  Here, the main ridge line equivalent part is a part where a bent part having a relatively large curvature characterizing the overall shape of the heat insulator 3 continues. That is, among the various bent portions formed on the heat insulator 3, the bent portion extends over a relatively long length that substantially determines the external shape of the heat insulator 3.

  When the heat insulator 3 is attached to the exhaust manifold 1, the heat insulator 3 also vibrates due to the transmission of vibration from the exhaust manifold 1. When the heat insulator 3 vibrates due to this vibration, the portions of the heat insulator 3 on both sides of the portion corresponding to the main ridge line are vibrated greatly like butterfly wings. When such vibration is generated, a portion near the ridge line portion of the heat insulator 3 is subject to metal fatigue due to repeated bending, and cracks are likely to occur.

  On the other hand, the heat insulator 3 according to the present embodiment is such that one direction of the corrugated shape formed in the heat insulator 3 intersects the main ridge line corresponding portion, and is preferably orthogonal. Therefore, the corrugated shape realizes the action of the rib against the vibration centered on the ridge line corresponding portion. Thereby, the vibration of the heat insulator 3 can be suppressed, the occurrence of cracks in the heat insulator 3 can be prevented, and the quality of the heat insulator 3 can be significantly improved.

  By configuring in this way, the heat insulator 3 is, as shown in FIG. 9, the bolt boss provided in the exhaust manifold 1 via the shock absorber 10 mounted in the mounting hole 3 a formed in the heat insulator 3. 41 can be fixed.

  As described above, the shock absorber 10 is disposed between the bolt boss 41 provided on the exhaust manifold 1 that is the vibration source and the heat insulator 3 that is the connection target, and the bolt boss 41 provided on the exhaust manifold 1 and the heat insulator. 3 and a device for buffering vibration transmission from the bolt boss 41 provided on the exhaust manifold 1 to the heat insulator 3. As described above, the shock absorber 10 is stable and excellent. It can exhibit vibration damping.

  Specifically, the collar member 30 has a single cross section with thick portions 31b and 32b having an appropriate thickness in the radial direction and disk-shaped flange portions 31a and 32a protruding outward from the upper and lower ends of the ring portion. The upper collar member 31 and the lower collar member 32, each of which is configured in a substantially L shape, are formed so that the flange portions 31a and 32a are on the outer side, the thick portion bottom surface 31ba of the thick portion 31b, and the thick portion 32b. The product reliability of the shock absorber 10 with high vibration damping can be improved by configuring the thick portion upper surface 32ba so as to face each other in the insertion direction of the mounting bolt 42.

  Specifically, the collar member 30 has a single cross section with thick portions 31b and 32b having an appropriate thickness in the radial direction and disk-shaped flange portions 31a and 32a protruding outward from the upper and lower ends of the ring portion. The upper collar member 31 and the lower collar member 32, each of which is configured in a substantially L shape, have a thick portion bottom surface 31ba of the thick portion 31b and a thickness of the thick portion 32b so that the flange portions 31a and 32a are on the outside. The fitting recess 33 can be formed in a space surrounded by the thick portions 31b and 32b facing each other and the flange portions 31a and 32a by assembling the meat portion upper surface 32ba so as to face each other.

  Further, since the thick portion bottom surface 31ba of the thick portion 31b of the assembled upper color member 31 and lower collar member 32 and the thick portion upper surface 32ba of the thick portion 32b face each other, the assembled color When the mounting bolt 42 is inserted into the bolt hole 40 of the member 30 and fixed to the exhaust manifold 1, it is possible to prevent the flange portions 31 a and 32 a from being deformed by the fastening pressure of the mounting bolt 42.

  Furthermore, the thick portion bottom surface 31ba of the thick portion 31b of the upper collar member 31 and the thick portion upper surface 32ba of the thick portion 32b of the lower collar member 32 are attached in plan view as shown in FIG. Since the bolt 42 is formed in a ring shape having an inner diameter smaller than the outer diameter of the bolt head 42 a and a larger outer diameter, the flange portions 31 a and 32 a are caused by the fastening pressure from the bolt head 42 a by tightening the mounting bolt 42. The deformation can be prevented by the fastening pressure of the mounting bolt 42.

  Therefore, regardless of the fastening state of the mounting bolt 42, a gap S for improving vibration damping formed between the collar member mounting portion 53 and the fitting recess 33 can be secured, and the collar member mounting portion 53 is secured. The vibration input through the collar member 30 can be absorbed by the gap S without causing a collision sound in the fitting recess 33. Further, heat transfer can be blocked by the gap S.

  Furthermore, since the clearance S for improving the vibration damping property is provided between the fitting recess 33 and the collar member mounting portion 53, the vibration damping property of the shock absorber 10 can be further improved. Specifically, since the gap S for improving the vibration damping property is formed in the state in which the collar member mounting portion 53 formed in the arc shape is held by the fitting recess 33, that is, a slight amount for improving the vibration damping property. Since the gap S of about 0.2 mm is formed, the axis is formed between the collar member 10 and the buffer member 8 and actively formed so that each of them moves freely like the buffer device 5 of the prior art. As in the gap 17 (see FIG. 43) in the radial direction and the radial direction (planar direction), the vibration input through the collar member 30 is not generated in the collar member mounting portion 53 and the fitting recess 33 without causing a collision sound. S can be absorbed. Further, heat transfer can be blocked by the gap S.

  In addition, the collar member 30 constitutes a spacing holding means by assembling the thick portion bottom surface 31ba and the thick portion top surface 32ba facing each other as a part of the upper collar member 31 and the lower collar member 32, and mounting bolts. Since the relative relationship between the flange portions 31a and 32a sandwiched from both sides in the insertion direction of the 42 and the collar member mounting portion 53 is securely held, the component is compared with the case where the interval holding means is configured by another component. The number of points can be reduced, and the assembly process and cost can be reduced.

  Further, in the case where the interval holding means is constituted by another component, for example, there is a possibility that the interval holding means may fall off and the interval cannot be held. As the interval holding means, the collar member 30 is composed of the upper collar member 31 and the lower collar. Since the thick portion bottom surface 31ba and the thick portion top surface 32ba, which are a part of the member 32, are assembled so as to face each other, they do not fall off the collar member 30, and the interval between the flange portions 31a, 32a is reliably maintained. be able to.

  Moreover, since the thick part bottom surface 31ba and the thick part upper surface 32ba are configured as a part of the thick parts 31b, 32b constituting the bolt hole 40, the shape of the collar member 30 can be configured simply. . Therefore, the processability of the upper collar member 31 and the lower collar member 32 can be improved.

  Further, since the fitting cylinder portion 31 c of the upper collar member 31 is inserted into the fitting opening 32 c of the lower collar member 32 and is integrated by caulking, the flange portions 31 a and 32 a are separated from the collar member 30. Even when a direction external force is applied, the flange portions 31a and 32a are not separated from each other. Therefore, the desired relative relationship between the flange portions 31a and 32a and the collar member mounting portion 53 can be reliably maintained. In other words, the caulking and fixing between the fitting cylinder portion 31c of the upper collar member 31 and the fitting opening 32c of the lower collar member 32 is an interval that keeps the interval against the external force in the direction in which the interval between the flange portions 31a and 32a is separated. It can also function as a holding means.

  In addition, the shock absorbing member is a spiral multi-stage coil spiral spring 50 formed of a spiral wire in plan view, and a collar member mounting portion 53 that allows the collar member 30 to be mounted is provided in the central portion in the radial direction in the spiral shape in plan view. Since the fitting recess 33 for holding the collar member mounting portion 53 is provided outside the diameter of the collar member 30, it is configured by a spiral wire in plan view by vibration transmitted from the collar member 30 to the spiral multi-stage coil spiral spring 50. The spiral multistage coil spiral spring 50 itself bends. Due to this bending motion, the shock absorber 10 can convert the vibrational energy of vibration transmitted from the collar member 30 into the bending kinetic energy of the helical multi-stage coil spiral spring 50 and suppress the vibration transmitted to the heat insulator 3. .

  That is, in the shock absorber 5 of the prior art, the gap 17 in the axial direction, that is, the insertion direction and the radial direction (plane direction), which is positively formed so as to freely move between the collar member 10 and the shock absorbing member 8. The role is realized by the clearance between the wires of the spiral spiral portion 51 in the spiral multi-stage coil spiral spring 50, and the transmission of the input vibration is suppressed, that is, excellent damping performance is realized.

  The shock absorber 10 of the present embodiment has been described in relation to the heat insulator 3 for the exhaust manifold 1 mounted on the engine 2 of the automobile, but the present invention is not limited to such an embodiment. For example, the present invention may be applied to attachment of covers for various uses such as an under cover that covers the bottom of the vehicle body. Moreover, it can implement for attachment of covers of various uses other than a motor vehicle.

  Further, in the above-described collar member 30, the fitting tube portion 31c of the upper collar member 31 is inserted into the fitting opening 32c of the lower collar member 32 and is integrated by crimping. However, as shown in FIG. The upper collar member 31 and the lower collar member 32 may be fixed by a method. In addition, in FIG. 12 which is explanatory drawing about the collar member 30 of another form, Fig.12 (a) is explanatory drawing about the collar member 30 fixed by screwing, FIG.12 (b) is press-fit in a recessed part. The explanatory view about the collar member 30 fixed by is shown.

  Specifically, as shown in FIGS. 12A-2 and 12A-3, the collar member 30 fixed by screwing includes an outer peripheral surface 31ca of the fitting cylinder portion 31c of the upper collar member 31, and a lower collar. The thread groove formed in the inner peripheral surface 32ca of the fitting opening 32c in the member 32 is screwed together, and the upper collar member 31 and the lower collar member 32 are fixed as shown in FIG.

  The lower collar member 32 is constituted only by the flange portion 32a having the fitting opening 32c, and the thick portion 31b of the upper collar member 31 is formed at a height corresponding to the fitting recess 33, and its end portion The fitting cylinder portion 31c having a height corresponding to the flange portion 32a may be formed so as to protrude downward from the flange portion 32a.

  Also in this case, the upper collar member 31 and the lower collar member 32 are fixed by screwing the thread grooves formed on the inner surface 32ca of the fitting opening 32c and the outer peripheral surface 31ca of the fitting cylinder portion 31c. . In this case, the thick portion bottom surface 31ba is configured to face the upper surface of the flange portion 32a and come into surface contact therewith.

  Further, the collar member 30 to be fixed by press-fitting into the press-fit recess 32bb formed on the thick-walled upper surface 32ba of the lower collar member 32 is thick as shown in FIGS. 12 (b-2) and 12 (b-3). With the bottom surface 31ba and the thick portion upper surface 32ba facing each other, the thick portion 31b at a position corresponding to the press-fit recess 32bb formed on the thick portion upper surface 32ba is pressed, and the upper collar member 31 is pressed into the press-fit recess 32bb. A part of the thick part 31b is press-fitted, and the upper collar member 31 and the lower collar member 32 are fixed as shown in FIG. As described above, there are various methods for fixing the upper collar member 31 and the lower collar member 32 in the collar member 30 such as spot welding or the like, and the method is not limited.

  In the above description, the spiral multi-stage coil spiral spring 50 made of a spiral spiral wire is used as the buffer member. However, the present invention is not limited to this, and as shown in FIGS. It is obvious that effects other than the effects of the spiral multi-stage coil spiral spring 50 can be obtained even if the buffer member is used.

  In the following description, in order to describe an alternative of the buffer member, in FIGS. 13 to 42, the grommet 20 and the collar member 30 in the buffer device 10 are the same as those in the buffer device 10 described above. Since the configuration is the same as that shown in FIG. 1, it is indicated by a dotted line, and only the buffer member 150 which is an essential part of the description is indicated by a solid line.

  The shock-absorbing member 150 of the second embodiment is composed of a substantially fan-shaped portion arranged in two opposing directions and an arc-shaped portion connecting the fan-shaped portions with one steel wire, and the outer periphery of the fan-shaped portion. Is held by the second holding portion 22, and the arc-shaped portion is held by the fitting recess 33 of the collar member 30. In FIGS. 13 and 14, which are explanatory views of the shock absorber 10 including the shock absorber 150 of the second embodiment, FIG. 13 (a) is a plan view, FIG. 13 (b) is a bottom view, and FIG. (C) is a front view, FIG. 13 (d) is a right side view, FIG. 13 (e) is a plane direction sectional view, and FIG. 13 (f) is an AA sectional view in FIG. 14A shows an enlarged perspective view seen from the bottom side, FIG. 14B shows a perspective one-side enlarged sectional view seen from the bottom side, and FIG. 14C shows the vertical axis L. A reference exploded bottom side perspective view in which the grommet 20, the collar member 30, and the buffer member 150 are disassembled is shown. The rear view is the same as the front view, and the left side view is the same as the right side view.

  The shock-absorbing member 150 of the third embodiment is composed of a substantially fan-shaped portion arranged in three directions and an arc-shaped portion connecting the fan-shaped portions with a single steel wire, as if it were a radioactivity sign. And the outer periphery of the fan-shaped portion is held by the second holding portion 22 and the arc-shaped portion is held by the fitting recess 33 of the collar member 30. In FIGS. 15 and 16, which are explanatory views of the shock absorber 10 including the shock absorber 150 of the third embodiment, FIG. 15 (a) is a plan view, FIG. 15 (b) is a bottom view, and FIG. 15C is a front view, FIG. 15D is a right side view, FIG. 15E is a plan sectional view, and FIG. 15F is an AA sectional view in FIG. 16 (a) shows an enlarged perspective view seen from the bottom side, FIG. 16 (b) shows a perspective one-side enlarged sectional view seen from the bottom side, and FIG. 16 (c) shows an axis L in the vertical direction. A reference exploded bottom side perspective view in which the grommet 20, the collar member 30, and the buffer member 150 are disassembled is shown. The rear view is the same as the front view, and the left side view is the same as the right side view.

  The shock-absorbing member 150 of the fourth embodiment is formed by forming a steel wire rod into a substantially triangular shape with corners arced, holding the corners with the second holding part 22, and a color member around the center of the side part. It is the structure hold | maintained by 30 fitting recessed parts 33. In FIGS. 17 and 18, which are explanatory views of the shock absorber 10 including the shock absorber 150 of the fourth embodiment, FIG. 17 (a) is a plan view, FIG. 17 (b) is a bottom view, and FIG. (C) is a front view, FIG. 17 (d) is a right side view, FIG. 17 (e) is a plane direction sectional view, and FIG. 17 (f) is an AA sectional view in FIG. 18 (a) shows an enlarged perspective view seen from the bottom side, FIG. 18 (b) shows a perspective one side enlarged sectional view seen from the bottom side, and FIG. 18 (c) shows an axis L in the vertical direction. A reference exploded bottom side perspective view in which the grommet 20, the collar member 30, and the buffer member 150 are disassembled is shown. The rear view is the same as the front view, and the left side view is the same as the right side view.

  The shock-absorbing member 150 of the fifth embodiment is formed by forming a steel wire rod into a substantially cross shape in which approximately triangular arcs of corners are arranged in four directions, and holding the corners by the second holding part 22. The inner side is held by the fitting recess 33 of the collar member 30. 19 and 20, which are explanatory views of the shock absorber 10 including the shock absorber 150 of the fifth embodiment, FIG. 19 (a) is a plan view, FIG. 19 (b) is a bottom view, and FIG. (C) is a front view, FIG. 19 (d) is a right side view, FIG. 19 (e) is a plane direction sectional view, and FIG. 19 (f) is an AA sectional view in FIG. 19 (a). 20A shows an enlarged perspective view seen from the bottom side, FIG. 20B shows a perspective one-side enlarged sectional view seen from the bottom side, and FIG. 20C shows the vertical axis L. A reference exploded bottom side perspective view in which the grommet 20, the collar member 30, and the buffer member 150 are disassembled is shown. The rear view is the same as the front view, and the left side view is the same as the right side view.

  In the buffer member 150 of the sixth embodiment, a U-shaped portion that is open inward in a diameter that forms a substantially quadrangular shape is arranged in four directions, and an arc-shaped portion that connects the insides of the U-shaped portions is a steel. The wire-making material is formed in a substantially cross shape, and the radially outer side portion of the U-shaped portion is held by the second holding portion 22, and the arc-shaped portion is held by the fitting recess 33 of the collar member 30. 21 and 22, which are explanatory views of the shock absorber 10 including the shock absorber 150 of the sixth embodiment, FIG. 21 (a) is a plan view, FIG. 21 (b) is a bottom view, and FIG. (C) is a front view, FIG. 21 (d) is a right side view, FIG. 21 (e) is a plane direction sectional view, and FIG. 21 (f) is an AA sectional view in FIG. 22 (a) shows an enlarged perspective view seen from the bottom side, FIG. 22 (b) shows a perspective one-side enlarged sectional view seen from the bottom side, and FIG. 22 (c) shows an axis L in the vertical direction. A reference exploded bottom side perspective view in which the grommet 20, the collar member 30, and the buffer member 150 are disassembled is shown. The rear view is the same as the front view, and the left side view is the same as the right side view.

  The shock-absorbing member 150 of the seventh embodiment is configured such that the steel wire rod has an outer peripheral portion along the inner side of the fitting concave portion 33 of the collar member 30 and an inner peripheral portion along the outer side of the fitting concave portion 33 of the collar member 30. The parts are connected by one connecting part, the outer peripheral part is held by the second holding part 22, and the inner peripheral part is held by the fitting concave part 33 of the collar member 30. In FIGS. 23 and 24, which are explanatory views of the shock absorber 10 including the shock absorber 150 of the seventh embodiment, FIG. 23 (a) is a plan view, FIG. 23 (b) is a bottom view, and FIG. (C) is a front view, FIG. 23 (d) is a right side view, FIG. 23 (e) is a plane direction sectional view, and FIG. 23 (f) is an AA sectional view in FIG. 24A shows an enlarged perspective view seen from the bottom side, FIG. 24B shows a perspective one-side enlarged sectional view seen from the bottom side, and FIG. 24C shows the vertical axis L. A reference exploded bottom side perspective view in which the grommet 20, the collar member 30, and the buffer member 150 are disassembled is shown. The rear view is the same as the front view, and the left side view is the same as the right side view.

  In the buffer member 150 of the eighth embodiment, each of the outer peripheral portion along the inner side of the second holding portion 22 and the inner peripheral portion along the outer side of the fitting concave portion 33 has two radial connecting portions. And the steel wire is formed in a substantially donut shape, the outer peripheral portion is held by the second holding portion 22, and the inner peripheral portion is held by the fitting recess 33 of the collar member 30. 25 and 26, which are explanatory views of the shock absorber 10 including the shock absorbing member 150 of the eighth embodiment, FIG. 25 (a) is a plan view, FIG. 25 (b) is a bottom view, and FIG. (C) is a front view, FIG. 25 (d) is a right side view, FIG. 25 (e) is a plane direction sectional view, and FIG. 25 (f) is an AA sectional view in FIG. 26 (a) shows an enlarged perspective view seen from the bottom side, FIG. 26 (b) shows a perspective one-side enlarged sectional view seen from the bottom side, and FIG. A reference exploded bottom side perspective view in which the grommet 20, the collar member 30, and the buffer member 150 are disassembled is shown. The rear view is the same as the front view, and the left side view is the same as the right side view.

  The buffer member 150 of the ninth embodiment has a configuration in which the connecting portions that connect the outer peripheral portion and the inner peripheral portion constituting the buffer member 150 of the eighth embodiment are oblique. 27 and 28, which are explanatory views of the shock absorber 10 including the shock absorber 150 of the ninth embodiment, FIG. 27 (a) is a plan view, FIG. 27 (b) is a bottom view, and FIG. (C) is a front view, FIG. 27 (d) is a right side view, FIG. 27 (e) is a plane direction sectional view, and FIG. 27 (f) is an AA sectional view in FIG. 28 (a) shows an enlarged perspective view seen from the bottom side, FIG. 28 (b) shows a perspective one-side enlarged sectional view seen from the bottom side, and FIG. 28 (c) shows the vertical axis L. A reference exploded bottom side perspective view in which the grommet 20, the collar member 30, and the buffer member 150 are disassembled is shown. The rear view is the same as the front view, and the left side view is the same as the right side view.

  The shock-absorbing member 150 of the tenth embodiment has a semi-peripheral portion along the inner half of the second holding portion 22 and a semi-inner peripheral portion along the outer half of the fitting recess 33 connected by a radial connecting portion. The steel wire rods are formed in a semi-doughnut shape and are arranged in a pair symmetrically. 29 and 30, which are explanatory views of the shock absorber 10 including the shock absorber 150 of the tenth embodiment, FIG. 29 (a) is a plan view, FIG. 29 (b) is a bottom view, and FIG. (C) is a front view, FIG. 29 (d) is a right side view, FIG. 29 (e) is a plane direction sectional view, and FIG. 29 (f) is an AA sectional view in FIG. 30 (a) shows an enlarged perspective view seen from the bottom side, FIG. 30 (b) shows a perspective one-side enlarged sectional view seen from the bottom side, and FIG. 30 (c) shows an axis L in the vertical direction. A reference exploded bottom side perspective view in which the grommet 20, the collar member 30, and the buffer member 150 are disassembled is shown. The rear view is the same as the front view, and the left side view is the same as the right side view.

  The shock-absorbing member 150 of the eleventh embodiment is a pair of components, and the shock-absorbing member 150 of the tenth embodiment is formed in a single stroke with a single continuous steel wire rod. Therefore, the fitting concave portion 33 of the collar member 30 and the second holding portion 22 of the grommet 20 are formed to have a high height so as to allow the fitting of the overlapping portions of the buffer members 150 that are superposed one above the other. In addition, in FIG. 31, FIG. 32 which is explanatory drawing about the buffering device 10 provided with the buffer member 150 of 11th Example, FIG. 31 (a) is a top view, FIG.31 (b) is a bottom view, FIG. (C) is a front view, FIG. 31 (d) is a right side view, FIG. 31 (e) is a plane direction sectional view, and FIG. 31 (f) is an AA sectional view in FIG. 32 (a) shows an enlarged perspective view seen from the bottom side, FIG. 32 (b) shows a perspective one-side enlarged sectional view seen from the bottom side, and FIG. 32 (c) shows an axis L in the vertical direction. A reference exploded bottom side perspective view in which the grommet 20, the collar member 30, and the buffer member 150 are disassembled is shown. The rear view is the same as the front view, and the left side view is the same as the right side view.

  The cushioning member 150 of the twelfth embodiment is a substantially hex shape that connects the steel wire material from the inner side of the second holding part 22 to the inner side of the second holding part 22 that faces the opposite side of the fitting recess 33. The upper and lower portions are symmetrical with respect to each other, and the connecting portion is connected along the inner side of the second holding portion 22. The connecting portion is held by the second holding portion 22, and the apex of the substantially square-shaped portion is colored. The member 34 is held by the fitting recess 33. Therefore, the fitting concave portion 33 of the collar member 30 is formed to have a high height so as to allow the fitting of the overlapping portion of the buffer member 150 overlapped vertically. 33 and 34, which are explanatory views of the shock absorber 10 having the shock absorber 150 of the twelfth embodiment, FIG. 33 (a) is a plan view, FIG. 33 (b) is a bottom view, and FIG. (C) is a front view, FIG. 33 (d) is a right side view, FIG. 33 (e) is a plane direction sectional view, FIG. 33 (f) is an AA sectional view in FIG. (G) has shown BB sectional drawing in Fig.33 (a). 34 (a) shows an enlarged perspective view seen from the bottom side, FIG. 34 (b) shows a perspective one-side enlarged sectional view seen from the bottom side, and FIG. 34 (c) shows the vertical axis L. A reference exploded bottom side perspective view in which the grommet 20, the collar member 30, and the buffer member 150 are disassembled is shown. The rear view is the same as the front view, and the left side view is the same as the right side view.

  The buffer member 150 of the thirteenth embodiment is composed of two linear portions that sandwich the steel wire rod from the left and right inside the fitting recess 33 of the collar member 30, and an arc portion along the inner side of the second holding portion 22. It is a pair configuration in which they are formed in a bowl shape, are orthogonal to each other, and are stacked one above the other. Therefore, the fitting concave portion 33 of the collar member 30 and the second holding portion 22 of the grommet 20 are formed to have a high height so as to allow the fitting of the overlapping portions of the buffer members 150 that are superposed one above the other. 35 and 36, which are explanatory views of the shock absorber 10 including the shock absorber 150 of the thirteenth embodiment, FIG. 35 (a) is a plan view, FIG. 35 (b) is a bottom view, and FIG. (C) is a front view, FIG. 35 (d) is a right side view, FIG. 35 (e) is a plane direction sectional view, and FIG. 35 (f) is an AA sectional view in FIG. 36 (a) shows an enlarged perspective view seen from the bottom side, FIG. 36 (b) shows a perspective one-side enlarged sectional view seen from the bottom side, and FIG. 36 (c) shows an axis L in the vertical direction. A reference exploded bottom side perspective view in which the grommet 20, the collar member 30, and the buffer member 150 are disassembled is shown. The rear view is the same as the front view, and the left side view is the same as the right side view.

  The shock-absorbing member 150 of the fourteenth embodiment forms a steel wire in a star shape written with a single stroke, holds the corners with the second holding part 22, and the central part of one part near the center of the collar member 30. It is the structure held by the fitting recess 33. Therefore, the fitting concave portion 33 of the collar member 30 is formed to have a high height so as to allow the fitting of the overlapping portion of the buffer member 150 overlapped vertically. 37 and 38, which are explanatory views of the shock absorber 10 including the shock absorber 150 of the fourteenth embodiment, FIG. 37 (a) is a plan view, FIG. 37 (b) is a bottom view, and FIG. (C) is a front view, FIG. 37 (d) is a right side view, FIG. 37 (e) is a left side view, FIG. 37 (f) is a rear view, and FIG. 37 (g) is an A- in FIG. A sectional view is shown. 38 (a) shows an enlarged perspective view seen from the bottom side, FIG. 38 (b) shows a perspective one side enlarged sectional view seen from the bottom side, and FIG. 38 (c) shows the vertical axis L. A reference exploded bottom side perspective view in which the grommet 20, the collar member 30, and the buffer member 150 are disassembled is shown.

  The shock absorbing member 150 of the fifteenth embodiment is formed by forming a steel wire into a four-half donut shape, that is, a wide arc-shaped outer shape, arranging four straight portions in the circumferential direction with a space between each other, and forming an outer peripheral portion. The inner holding portion is held by the fitting recess 33 of the collar member 30 while being held by the second holding portion 22. In addition, in FIG. 39 and FIG. 40 which are the explanatory drawings about the buffering device 10 provided with the buffer member 150 of 15th Example, FIG. 39 (a) is a top view, FIG.39 (b) is a bottom view, FIG. 39 (c) is a front view, FIG. 39 (d) is a right side view, FIG. 39 (e) is a left side view, FIG. 39 (f) is a rear view, and FIG. 39 (g) is an A- in FIG. A sectional view is shown. 40A shows an enlarged perspective view seen from the bottom side, FIG. 40B shows a perspective one-side enlarged sectional view seen from the bottom side, and FIG. 40C shows the vertical axis L. A reference exploded bottom side perspective view in which the grommet 20, the collar member 30, and the buffer member 150 are disassembled is shown.

The cushioning member 150 of the sixteenth embodiment is provided with four quarter-doughnut-shaped, that is, four wide arc-shaped openings at equal intervals on a circular flat plate, and an outer peripheral circular portion along the outside of the second holding portion 22. And the inner peripheral circular portion along the inside of the fitting recess 33 of the collar member 30 are connected in a cross shape. The outer peripheral circular portion held by the second holding portion 22 and the inner peripheral circular portion held by the fitting concave portion 33 of the collar member 30 are formed thicker than the flat plate portion. 41 and 42, which are explanatory views of the shock absorber 10 including the shock absorber 150 of the sixteenth embodiment, FIG. 41 (a) is a plan view, FIG. 41 (b) is a bottom view, and FIG. (C) is a front view, FIG. 41 (d) is a right side view, FIG. 41 (e) is a plane direction sectional view, and FIG. 41 (f) is an AA sectional view in FIG. 42 (a) shows an enlarged perspective view seen from the bottom side, FIG. 42 (b) shows a perspective one-side enlarged sectional view seen from the bottom side, and FIG. 42 (c) shows an axis L in the vertical direction. A reference exploded bottom side perspective view in which the grommet 20, the collar member 30, and the buffer member 150 are disassembled is shown. The rear view is the same as the front view, and the left side view is the same as the right side view.
Thus, by configuring the collar member 30 as described above, the same effect can be obtained even with the spiral multi-stage coil spiral spring 50 and the buffer member 150 having various shapes.

As described above, in the correspondence between the configuration of the present invention and the above-described embodiment,
The vibration target member and the exhaust path of the present invention correspond to the exhaust manifold 1,
Similarly,
The connection target member and the metal cover correspond to the heat insulator 3,
The buffer member corresponds to the spiral multi-stage coil spiral spring 50 or the buffer member 150,
The coupling member corresponds to the grommet 20,
The fastening member corresponds to the mounting bolt 42,
The fastening member insertion portion corresponds to the bolt hole 40,
The buffer member holding portion corresponds to the fitting recess 33,
The flange components correspond to the upper collar member 31 and the lower collar member 32,
The interval holding means and the orthogonal surface correspond to the thick part bottom surface 31ba of the upper collar member 31 and the thick part upper surface 32ba of the lower collar member 32,
The head of the bolt corresponds to the bolt head 42a,
The component fixing means includes crimping of the fitting cylinder portion 31c of the upper collar member 31 with respect to the fitting opening 32c of the lower collar member 32, and the inner peripheral surface 32ca of the fitting opening 32c and the outer peripheral surface 31ca of the fitting cylinder portion 31c. Corresponding to screwing of the formed screw groove, press-fitting into the press-fitting recess 32bb formed on the thick-walled upper surface 32ba,
The internal combustion engine corresponds to the engine 2,
Although the crushing target portion corresponds to the crushing portion 3b, the present invention is not limited to the above-described embodiment.

  For example, in this embodiment, in the collar member 30, the second holding portion 22, the connecting portion 23, and the first holding portion 21 are arranged in this order from the side of the bolt boss 41 provided on the exhaust manifold 1. You may arrange | position the 1st holding | maintenance part 21, the connection part 23, and the 2nd holding | maintenance part 22 from the side of the boss | hub 41 for bolts provided in this.

  The grommet 20 includes a first holding portion 21 that holds the heat insulator 3 on the radially outer side, a second holding portion 22 that holds the spiral multistage coil spiral spring 50 on the radially inner side, the first holding portion 21 and the first holding portion 21. The connecting portion 23 that connects the two holding portions 22 is configured in an annular shape having a substantially S-shaped cross section, but the heat insulator 3 is held on the outer side and the spiral multistage coil spiral spring 50 is held on the inner side. For example, the inverted U-shaped and V-shaped holding portions that hold the heat insulator 3 and the spiral multi-stage coil spiral spring 50 are arranged outwardly, and a single cross-section connecting the holding portions. You may comprise the annular member used as a shape.

  Further, in the above description, the upper collar member 31 that protrudes downward and the lower collar member 32 are fitted together to form the collar member 30 by caulking, and the shock absorber 10 is mounted in this orientation. The shock absorber 10 may be equipped in the upside down direction in which the member 31 and the lower collar member 32 are turned upside down.

  Furthermore, the radial size of the bolt head 42a of the mounting bolt 42 and the thick part bottom surface 31ba or the thick part top surface 32ba is equal to the thick part bottom surface 31ba or the thick part top surface 32ba as described above. It is preferable from the viewpoint of the proof strength against the fastening pressure that the mounting bolt 42 has an inner diameter smaller than the outer diameter of the bolt head 42a and an outer diameter larger than the outer diameter of the bolt head 42a. The thick wall bottom surface 31ba and the thick wall top surface 32ba have an inner diameter smaller than the outer diameter of the bolt head 42a of the mounting bolt 42, and are approximately equal to or slightly smaller than the outer diameter of the bolt head 42a. You may form in the magnitude | size which has a diameter.

DESCRIPTION OF SYMBOLS 1 ... Exhaust manifold 2 ... Engine 3 ... Heat insulator 10 ... Shock absorber 20 ... Grommet 21 ... 1st holding | maintenance part 22 ... 2nd holding | maintenance part 23 ... Connection part 30 ... Collar member 31 ... Upper color member 32 ... Lower color member 31a, 32a ... Flange portion 31ba ... Thick portion bottom surface 32ba ... Thick portion upper surface 32bb ... Press-fit recess 31c ... Fitting cylinder portion 32c ... Fitting opening 31ca ... Outer peripheral surface 32ca ... Inner peripheral surface 33 ... Fitting recess 40 ... Bolt hole 42 ... Mounting bolt 42a ... Bolt head 50 ... Spiral multistage coil spiral spring 53 ... Color member mounting part 54 ... Held part 150 ... Buffer member S ... Gap

Claims (8)

By connecting between the vibration target member that is a vibration source and the connection target member that is the connection target, and by fastening the vibration target member to the vibration target member with a fastening member, A shock absorber for buffering transmission of vibration from the vibration target member to the connection target member is configured with a buffer member for buffering vibration, and a coupling member for coupling the buffer member and the connection target member, and the fastening member. A collar member interposed between the buffer member,
While providing a fastening member insertion portion that allows the insertion of the fastening member inside the diameter,
From both sides in the insertion direction of the fastening member, a shock-absorbing member holding portion constituted by a flange portion that sandwiches and holds the collar member mounting portion is provided on the outer diameter side.
Assembling a flange component including each of the flange portions sandwiched from both sides in the insertion direction,
The collar member provided with the space | interval holding means which hold | maintains the space | interval of the flange parts pinched | interposed from the both sides in the said insertion direction. Each flange component includes an orthogonal surface in a direction orthogonal to the insertion direction,
The interval holding means;
The collar member according to claim 1, wherein the flange member is configured by the orthogonal surfaces facing each other in a state where the flange components are assembled in the insertion direction. The collar member according to claim 2, wherein the orthogonal surface is continuously formed outside the diameter of the fastening member insertion portion. The fastening member,
A nut that is screwed into a bolt that is implanted in the connection target member, or a bolt that is screwed into a screw hole provided in the connection target member.
The collar member according to claim 3, wherein the orthogonal surface is formed larger than the nut or the head of the bolt in the orthogonal direction. The collar member according to any one of claims 1 to 4, further comprising component fixing means for fixing the flange components in an assembled state. The collar member according to any one of claims 1 to 5, the buffer member, and the coupling member,
The coupling member;
Enclosing the buffer member;
A first holding portion for holding the connection target member on the outer diameter side;
A second holding portion for holding the buffer member on the inside of the diameter;
The first holding part and the second holding part are connected to each other to form a connection part,
The buffer member;
A collar member mounting portion that allows the mounting of the collar member is provided in the radial center portion, and a held portion that is held by the second holding portion is configured by a wire provided in the radially outer portion,
A shock absorber configured to sandwich and hold the collar member mounting portion from both sides in the insertion direction with a flange portion constituting the shock absorber holding portion. The shock absorber according to claim 6, wherein a gap for improving vibration damping is provided between the flange portion and the collar member mounting portion. A metal cover made of one or a plurality of aluminum alloy plates each having a corrugated shape extending in a direction intersecting with each other and having a three-dimensional shape,
Crushing the corrugated shape of the crushing target site to form a substantially flat plate shape,
Either one of the directions intersecting with each other is defined as a direction intersecting with a main ridge line corresponding part constituting the three-dimensional shape,
Using the shock absorber according to claim 7,
The metal cover which comprised the said vibration object member with the internal combustion engine and / or its exhaust path, and hold | maintained the said crushing object site | part with said 1st holding | maintenance part.

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