WO2014080713A1

WO2014080713A1 - Hybrid damper

Info

Publication number: WO2014080713A1
Application number: PCT/JP2013/078424
Authority: WO
Inventors: 勇一南部; 敦勧内山
Original assignee: タカタ株式会社
Priority date: 2012-11-22
Filing date: 2013-10-21
Publication date: 2014-05-30
Also published as: JP6040010B2; JP2014101976A

Abstract

Provided is a hybrid damper which has improved damping performance, is compact, and can be easily tuned. A hybrid damper (1) according to an embodiment of the present invention is provided with: a support (2) which is connected to an object (S) to be damped, the connection being such that the support (2) can move relative to the object (S); a rubber, plate-like elastic body (3) (first plate-like elastic body (31), second plate-like elastic body (32), and third plate-like elastic body (33)) which has insertion holes (31a, 32a, 33a) into which the support (2) can be inserted; and a stopper (4) which restricts the movement of the plate-like elastic body (3) in the axial direction of the support (2). The plate-like elastic body (3) has a friction generation section (F) which generates frictional force when the support (2) moves relative to the object (S) to be damped, and the plate-like elastic body (3) is configured so that the vibration of the object (S) to be damped is damped utilizing the elastic force of the plate-like elastic body (3) and the frictional force generated by the friction generation section (F).

Description

Hybrid damper

The present invention relates to a hybrid damper for attenuating vibration of an object to be controlled by using elastic force and frictional force.

Vehicles such as automobiles have a steering device for operating the traveling direction by giving a steering angle to the front wheels. Such a steering apparatus generally has a steering wheel for a passenger to perform a rotation operation during driving, and a steering shaft that converts the rotation of the steering wheel into a steering angle operation. When vibration is transmitted to the steering wheel via the steering shaft while the vehicle is running or idling, comfortable driving is hindered. Therefore, conventionally, a damper for attenuating vibration is disposed on the steering wheel (see, for example, Patent Document 1 and Patent Document 2).

For example, a damper described in Patent Document 1 is a dynamic damper that elastically supports a mass member with a spring member with respect to a vibration member and constitutes a secondary vibration system for the vibration member, and has a circular cross-sectional shape. The spring member is constituted by a plurality of support rubber elastic bodies extending in parallel to each other. Such a dynamic damper is often attached to a metal core that forms a skeleton of a steering wheel.

By the way, in recent years, an air bag device for protecting an occupant at the time of a vehicle collision or the like is mounted on the steering wheel. Since such an airbag apparatus occupies most of the internal space of the steering wheel, it is difficult to dispose a dynamic damper as described in Patent Document 1. In view of this, a vibration damping structure that functions as a damper mass of a dynamic damper by supporting an inflator via a damper rubber has already been proposed.

For example, Patent Document 2 is applied to a steering wheel provided with an airbag device having an airbag and an inflator that supplies gas to the airbag, and the inflator is disposed on the vehicle front side of the inflator. A damping structure for a steering wheel configured to function as a damper mass of a dynamic damper by supporting the support member via a damper rubber, wherein the damper rubber has a cylindrical shape or a conical cylindrical shape, and is itself A damper main body disposed between the inflator and the support member so that a central axis of the base extends in the front-rear direction, and one end surface in a direction along the central axis as a base end surface, and the base end surface is the inflator and the In the state of contact with or approaching one of the support members, the circumferential direction of the outer peripheral surface of the damper body is fixed. That a rib protruding outward is disclosed from some.

JP 2002-295577 A JP 2011-195048 A

The dampers described in Patent Document 1 and Patent Document 2 described above are usually made of a rubber elastic body and dampen vibration by using the elastic force of rubber. If only the properties of such rubber are used, the mass of the damper (mass body) may become large or it may be difficult to tune to a specific frequency (for example, the resonance frequency) in order to exhibit the predetermined damping performance. There was a problem that.

The present invention has been devised in view of such problems, and an object of the present invention is to provide a hybrid damper that can improve the damping performance and can reduce the size of the damper and facilitate the tuning.

According to the present invention, the strut connected to the object to be damped so as to be relatively movable, the rubber plate-like elastic body having an opening that can be inserted into the strut, and the strut of the plate-like elastic body. A stopper that restricts the axial movement of the plate-like elastic body, and the plate-like elastic body has a friction generating portion that generates a friction force when the column is relatively moved, and the elastic force of the plate-like elastic body and the friction generation There is provided a hybrid damper characterized in that the vibration of the object to be controlled is damped by utilizing the frictional force of the part.

The plate-like elastic body includes a cylindrical shaft portion disposed along the outer periphery of the support column, an edge portion disposed on the outer periphery of the shaft portion, and a thin wall portion connecting the shaft portion and the edge portion. The friction generating part may be constituted by a surface of the shaft part or the edge part.

A plurality of the plate-like elastic bodies may be inserted through the support columns. The plate-like elastic bodies inserted through a plurality of sheets may be formed such that the diameters of the insertion holes are different from each other.

The damping object has an insertion hole for inserting and fixing the support, and the insertion hole may have a larger diameter than the inserted support, or the tip of the support The diameter may be increased toward the side. Moreover, the said damping object is a steering wheel, for example.

According to the above-described hybrid damper according to the present invention, the strut is connected to the object to be damped so as to be relatively movable, and a plate-like elastic body having elastic force is disposed and sandwiched between the struts, thereby controlling the vibration. The struts can be moved relative to each other at the time of vibration of the vibration object, and the plate-like elastic body can be slid relative to the vibration object, and a frictional force can be generated. The vibration of the vibration control object can be attenuated.

Further, since the plate-like elastic body is made of rubber, the vibration of the object to be controlled can be attenuated by the elastic force of the rubber. Therefore, the damping performance can be improved by using the frictional force in addition to the elastic force as compared with the conventional damper having only the elastic force. As a result, the damper can be downsized, and tuning can be facilitated by increasing the adjustment elements (elastic force and frictional force).

Also, by configuring the plate-like elastic body with the shaft part, the edge part, and the thin part, a spring part using the elastic force of rubber can be formed between the shaft part and the edge part, improving the damping function Can be made.

Further, by inserting and laminating a plurality of plate-like elastic bodies through the support columns, a plurality of friction generating portions can be formed, and a frictional force contributing to vibration attenuation can be effectively generated.

In addition, when a plurality of plate-like elastic bodies are stacked, the diameter of the insertion hole is formed to have a different size, so that when the support column vibrates, each plate-like elastic body has the same size as the diameter of the insertion hole. In addition, the elastic plates can be moved individually, the plate-like elastic bodies can be moved relative to each other, and a frictional force can be easily generated.

Further, by forming the insertion hole of the support column formed in the vibration control object larger than the support column, the support column can be moved relative to the vibration control object (vibrated), and formed in the vibration control object. By expanding the diameter of the insertion hole of the support column, the support column can be moved relative to the object to be controlled (swinged).

Also, by using a steering wheel as the object to be controlled, it is possible to effectively attenuate the vibration of the steering wheel.

It is a component development view showing a steering wheel which has a hybrid damper concerning a first embodiment of the present invention. FIGS. 2A and 2B are detailed explanatory views of the hybrid damper shown in FIG. 1, in which FIG. 1A is an enlarged partial sectional view, FIG. 1B is a rightward movement, and FIG. It is a figure which shows the modification of the hybrid damper which concerns on 1st embodiment, (A) is an expanded fragmentary sectional view, (B) is the time of rightward movement, (C) has shown the time of leftward movement. It is a figure which shows the steering wheel which has a hybrid damper which concerns on 2nd embodiment of this invention, (A) is a top view, (B) is components expansion | deployment sectional drawing. FIG. 5 is a detailed explanatory view of the hybrid damper shown in FIG. 4, (A) is an enlarged partial sectional view, (B) shows a rightward movement, and (C) shows a leftward movement. It is a figure which shows the modification of the hybrid damper which concerns on 2nd embodiment, (A) has shown the 1st modification, (B) has shown the 2nd modification.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. Here, FIG. 1 is a part development view showing a steering wheel having a hybrid damper according to the first embodiment of the present invention. 2A and 2B are detailed explanatory views of the hybrid damper shown in FIG. 1, in which FIG. 2A shows an enlarged partial sectional view, FIG. 2B shows a rightward movement, and FIG. 2C shows a leftward movement.

As shown in FIGS. 1 and 2, the hybrid damper 1 according to the first embodiment of the present invention can be inserted into the support column 2 and the support column 2 that are connected to the vibration suppression object S so as to be relatively movable. A rubber plate-like elastic body 3 (first plate-like elastic body 31, second plate-like elastic body 32, third plate-like elastic body 33) having

insertion holes

31a, 32a, 33a and a plate-like elastic body 3. And the stopper 4 that restricts the movement of the support column 2 in the axial direction. The plate-like elastic body 3 has a friction generating portion F that generates a friction force when the support column 2 is relatively moved. In addition, the vibration of the vibration control target S is attenuated by using the frictional force of the friction generating portion F.

The vibration suppression object S is, for example, a steering wheel. The illustrated steering wheel is equipped with an airbag module. For example, the airbag module is normally folded and accommodates an airbag 91 that is inflated and deployed by supplying gas in an emergency, an inflator 92 that supplies gas to the airbag 91, and the airbag 91 and the inflator 92. The retainer 93, a bag ring 94 that connects the airbag 91 and the inflator 92 to the retainer 93, and a module cover 95 that covers the folded airbag 91. For convenience of explanation, only the fixed portion of the airbag 91 is shown in FIG. 1 and other portions of the airbag 91 are omitted.

The steering wheel provided with such an airbag module may have a vibration damping structure that functions as a damper mass of the dynamic damper by supporting the inflator 92 via the hybrid damper 1 according to the present embodiment.

The support column 2 is composed of a bolt having a body portion 21 having a thread groove and a head portion 22 that is disposed at an end portion of the body portion 21 and has an enlarged diameter, and also serves as a component that connects the inflator 92 to the retainer 93. Yes. For example, insertion holes 92a are formed at the four corners of the inflator 92 to insert the head 21 of the support column 2. The insertion holes 91a are provided at corresponding positions of the airbag 91, the retainer 93, and the bag ring 94, respectively. , 93a, 94a are formed. Then, the retainer 93, the plate-like elastic body 3, the inflator 92, the airbag 91, and the bag ring 94 are arranged in this order, and the body portion 21 of the column 2 is inserted into the

insertion holes

94a, 91a, and 92a from the bag ring 94 side. The inflator 92, the airbag 91, the bag ring 94, and the plate-like elastic body 3 can be connected to the retainer 93 by screwing the nut 23 into the body portion 21 from the retainer 93 side. The structure of the plate-like elastic body 3 will be described later.

Here, the axial movement of the plate-like elastic body 3, the inflator 92, the airbag 91, and the bag ring 94 can be restricted by screwing the nut 23 into the trunk portion 21 having the head portion 22. That is, the head portion 22 and the nut 23 of the support column 2 constitute the stopper 4 described above.

The plate-like elastic body 3 is composed of, for example, three rubber dampers of a first plate-like elastic body 31, a second plate-like elastic body 32, and a third plate-like elastic body 33 as shown in FIG. As the rubber constituting these plate-like elastic bodies 3, for example, those having excellent heat resistance, cold resistance, weather resistance, etc., such as silicon rubber, ethylene / propylene rubber, fluorine rubber, and butyl rubber are used.

The plate-like elastic body 3 (the first plate-like elastic body 31, the second plate-like elastic body 32, and the third plate-like elastic body 33) has a shape that can be accommodated in the concave portion 93b of the retainer 93. For example, the concave portion 93b It is formed in a rectangular shape along the outer shape. Further, at the four corners of the plate-like elastic body 3 (the first plate-like elastic body 31, the second plate-like elastic body 32, and the third plate-like elastic body 33), insertion holes are provided at positions corresponding to the insertion holes 92a of the inflator 92. 31a, 32a, and 33a are formed, respectively. Furthermore, openings 31i, 32i, 33i through which the inflator 92 is inserted are inserted into the center of the plate-like elastic body 3 (first plate-like elastic body 31, second plate-like elastic body 32, third plate-like elastic body 33). Are formed respectively.

Further, a protrusion 93c is formed on a part of the inner surface of the recess 93b of the retainer 93, and a notch that can be engaged with the protrusion 93c is formed on the outer peripheral portion of the third plate-like elastic body 33 in contact with the retainer 93. 33k is formed. By engaging the notch 33k and the protrusion 93c when the hybrid damper 1 is attached, the rotation of the inflator 92 can be configured. If it is not necessary to prevent the inflator 92 from rotating, the third plate-like elastic body 33 may be omitted.

Thus, the inflator 92 is formed by laminating a plurality of plate-like elastic bodies 3 (first plate-like elastic body 31, second plate-like elastic body 32, and third plate-like elastic body 33) in the recess 93b of the retainer 93. As a result, the gap between the inflator 92 and the retainer 93 that has occurred in the prior art in which a cylindrical elastic body is disposed along the support 2 can be filled with the frame of the plate-like elastic body 3. Gas leakage can be suppressed.

Next, the configuration of the plate-like elastic body 3 (the first plate-like elastic body 31, the second plate-like elastic body 32, and the third plate-like elastic body 33) around the support column 2 will be described with reference to FIGS. Will be described with reference to FIG. FIG. 2A is a cross-sectional view showing only a portion around the column 2. As shown in FIG. 2 (A), the column 2 has a bag ring 94, an airbag 91, an inflator 92, a first plate-like elastic body 31, a second plate-like elastic body 32, a first plate, and the like. The three-plate elastic body 33 and the retainer 93 are inserted, and the nut 23 is screwed to the tip of the support column 2. The load applied to the plate-like elastic body 3 (the first plate-like elastic body 31, the second plate-like elastic body 32, and the third plate-like elastic body 33) can be adjusted by tightening the nut 23, and the nut 23 is tightened. Thus, the frictional force can be increased, and if it is tightened loosely, the frictional force can be decreased.

The plate-like elastic body 3 (the first plate-like elastic body 31 and the second plate-like elastic body 32) includes

cylindrical shaft portions

31b and 32b arranged along the outer periphery of the support column 2, and

shaft portions

31b and 32b.

Edge portions

31c, 32c arranged on the outer periphery, and

thin portions

31d, 32d connecting the

shaft portions

31b, 32b and the

edge portions

31c, 32c, and the friction generating portion F includes the

shaft portions

31b, 32b or It is comprised by the surface of the

edge parts

31c and 32c. The

thin portions

31d and 32d are formed in an annular shape so as to connect one surface side of the

shaft portions

31b and 32b and the other surface side of the

edge portions

31c and 32c, and the plate-like elastic body 3 (first plate-like elastic body). 31 and the second plate-like elastic body 32) are formed in an N-shape or an inverted N-shape.

The

thin portions

31d and 32d may be configured as one or a plurality of annular members that connect the

shaft portions

31b and 32b and the

edge portions

31c and 32c substantially in parallel. In this case, the plate-like elastic body 3 The partial cross-sectional shape has an H shape, a mouth shape, a day shape, and the like.

In this way, by connecting the

shaft portions

31b, 32b and the

edge portions

31c, 32c of the plate-like elastic body 3 (first plate-like elastic body 31, second plate-like elastic body 32) with the thin-

walled portions

31d, 32d. A spring mechanism can be formed between the

shaft portions

31b and 32b and the

edge portions

31c and 32c. Therefore, in the plate-like elastic body 3 (first plate-like elastic body 31 and second plate-like elastic body 32) in the present embodiment, in addition to the elastic force of the material itself, the elastic force by the spring mechanism also acts on the damping of vibration. Can do. This spring mechanism can arbitrarily adjust the spring constant according to the material, thickness, length, and the like of the

thin portions

31d and 32d.

As shown in FIG. 2A, the friction generating portion F is, for example, a contact surface between the shaft portion 31b of the first plate elastic body 31 and the shaft portion 32b of the second plate elastic body 32, A contact surface between the shaft portion 32 b of the two-plate elastic body 32 and the third plate-like elastic body 33 and a contact surface between the third plate-like elastic body 33 and the retainer 93 are configured.

Here, it is preferable that the upper and lower surfaces of the edge portion 32 c of the second plate-like elastic body 32 are not brought into contact with the adjacent first plate-like elastic body 31 and third plate-like elastic body 33. This is because when the entire surface of the edge portion 32c of the second plate-like elastic body 32 is brought into contact with the first plate-like elastic body 31 and the third plate-like elastic body 33, the frictional force becomes too large. However, a part or the entire surface of the edge 32c of the second plate-like elastic body 32 is brought into contact with the first plate-like elastic body 31 and the third plate-like elastic body 33 according to the required frictional force. May be. For the same reason, the edge 31c of the first plate-like elastic body 31 may not be brought into contact with the flange portion of the inflator 92.

In this embodiment, since the inflator 92 is used as a damper mass, it is necessary to move the column 2 in accordance with the vibration of the inflator 92 (movement in the left-right direction in the figure). Specifically, the insertion hole 93 a of the retainer 93 is formed larger than the diameter of the column 2. That is, the vibration suppression object S (including the retainer 93 fixed to the steering wheel) has an insertion hole 93a for inserting and fixing the support column 2, and the insertion hole 93a is more than the support column 2 to be inserted. It has a large diameter.

2A, the insertion hole 93a of the retainer 93, the insertion hole 33a of the third plate-like elastic body 33, the insertion hole 32a of the second plate-like elastic body 32, and the first plate-like elastic body. The diameter of the insertion hole 31a of 31 is formed so that it may become small gradually, and the insertion hole 31a of the 1st plate-shaped elastic body 31 is formed so that it may penetrate with the support | pillar 2 without gap. Therefore, in the plate-like elastic bodies 3 (the first plate-like elastic body 31, the second plate-like elastic body 32, and the third plate-like elastic body 33) inserted through a plurality of sheets, the diameters of the

insertion holes

31a, 32a, and 33a are respectively. It is formed to have different sizes. With this configuration, when the column 2 moves in the left-right direction, the first plate-like elastic body 31, the second plate-like elastic body 32, and the third plate-like elastic body 33 can be relatively moved in the left-right direction, and friction A frictional force can be generated in the generating portion F.

In addition, when the 1st plate-like elastic body 31, the 2nd plate-like elastic body 32, and the 3rd plate-like elastic body 33 are comprised with the same raw material, it will adhere and it adheres by the influence of a pressure or heat, and has adhered. There is a possibility that the relative movement becomes impossible. Therefore, the first plate-like elastic body 31, the second plate-like elastic body 32, and the third plate-like elastic body 33 are preferably made of a material different from the adjacent plate-like elastic body 3.

Here, the operation of the hybrid damper 1 described above will be described with reference to FIGS. 2 (B) and 2 (C). FIG. 2B shows a case where the inflator moves in the right direction of the figure, and FIG. 2C shows a case where the inflator moves in the left direction of the figure. By repeating the movement in the right direction and the left direction, the inflator 92 vibrates and moves relative to the vibration suppression object S (including the retainer 93 fixed to the steering wheel).

When the inflator 92 starts moving in the right direction in the figure from the state shown in FIG. 2 (A), the column 2 inserted into the flange portion of the inflator 92 has its tip portion inserted into the retainer 93 in a loose-fitting manner. 23, the retainer 93 is connected to the retainer 93, so that the inflator 92 moves in the right direction. And since the insertion hole 31a of the 1st plate-shaped elastic body 31 is penetrated with the support | pillar 2 without a gap, the 1st plate-shaped elastic body 31 will also move rightward with the support | pillar 2.

At this time, since the support 2 is inserted into the insertion hole 32a of the second plate-like elastic body 32 in a loose fit, the second plate-like elastic body 32 is not directly pressed by the support 2. Yes. Accordingly, the first plate-like elastic body 31 moves in the right direction relative to the second plate-like elastic body 32, and the lower surface of the shaft portion 31 b of the first plate-like elastic body 31 and the second plate-like elastic body 31. The upper surface of the shaft portion 32b of the elastic body 32 slides, and a frictional force is generated in the left direction.

When the support column 2 moves to the right by a certain distance, the support column 2 comes into contact with the second plate-like elastic body 32 and presses it to the right, and moves the second plate-like elastic body 32 to the right. At this time, since the support 2 is inserted into the insertion hole 33 a of the third plate-like elastic body 33 in a loose fit, the third plate-like elastic body 33 is not directly pressed by the support 2. Yes. Accordingly, the second plate-like elastic body 32 moves to the right relative to the third plate-like elastic body 33, and the lower surface of the shaft portion 32b of the second plate-like elastic body 32 and the third plate-like elastic body 32 are moved. The upper surface of the elastic body 33 slides, and a frictional force is generated in the left direction.

Furthermore, when the support column 2 moves to the right by a certain distance, the support column 2 comes into contact with the third plate-like elastic body 33, and the third plate-like elastic body 33 moves to the right direction relative to the retainer 93. It becomes. Therefore, the lower surface of the third plate-like elastic body 33 and the upper surface of the retainer 93 slide, and a frictional force is generated in the left direction. Finally, when the support column 2 reaches the insertion hole 93a of the retainer 93, the rightward movement is stopped, and the state shown in FIG.

Next, when the inflator 92 starts moving in the left direction from the state shown in FIG. 2B, the support column 2 inserted through the flange portion of the inflator 92 moves in the left direction as the inflator 92 moves. It becomes. And since the insertion hole 31a of the 1st plate-shaped elastic body 31 is penetrated with the support | pillar 2 without gap, the 1st plate-shaped elastic body 31 will also move to the left direction with the support | pillar 2.

When the support column 2 moves to the left by a certain distance, the support column 2 comes into contact with the second plate elastic body 32 and moves the second plate elastic body 32 to the left. Further, when the column 2 moves leftward by a certain distance, the column 2 comes into contact with the third plate-like elastic body 33 and moves the third plate-like elastic body 33 leftward. Further, the first plate-like elastic body 31, the second plate-like elastic body 32, and the third plate-like elastic body 33 are restricted from moving in the left direction by the side wall of the concave portion 93 b of the retainer 93. 2C, the first plate-like elastic body 31, the second plate-like elastic body 32, and the third plate-like elastic body 33 are connected to the support column 2 and the retainer. It will be compressed by the side wall of the recessed part 93b of 93.

Since the first plate-like elastic body 31 and the second plate-like elastic body 32 have a spring mechanism formed by the thin-

walled portions

31d and 32d, the elastic force of the spring mechanism acts in addition to the elastic force of the material itself to vibrate. Is attenuated. Further, since the first plate-like elastic body 31, the second plate-like elastic body 32, and the third plate-like elastic body 33 move relatively in the same manner as in the rightward movement, the first plate-like elasticity Between the lower surface of the shaft portion 31 b of the body 31 and the upper surface of the shaft portion 32 b of the second plate-like elastic body 32, the lower surface of the shaft portion 32 b of the second plate-like elastic body 32, and the upper surface of the third plate-like elastic body 33 In the meantime, a frictional force in the right direction is generated between the lower surface of the third plate-like elastic body 33 and the upper surface of the retainer 93 to attenuate the vibration.

As shown in FIG. 2A, the outer peripheral portion of the retainer 93 is provided with a certain gap so as not to collide with the side wall of the concave portion 93b of the retainer 93 when the support column 2 moves leftward. It is preferable to keep.

According to the hybrid damper 1 that uses both the elastic force and the frictional force according to the present embodiment described above, the column 2 is connected to the vibration suppression target S so as to be relatively movable, and the column 2 has an elastic force. By placing and holding the elastic body 3, the support column 2 can be moved relative to the vibration suppression object S during vibration, and the plate-like elastic body 3 is relatively moved relative to the vibration suppression object S accordingly. It can be made to slide, a frictional force can be generated, and the vibration of the damping object S can be attenuated.

Further, since the plate-like elastic body 3 is made of rubber, the vibration of the damping object S can be attenuated by the elastic force of the rubber. Therefore, the damping performance can be improved by using the frictional force in addition to the elastic force as compared with the conventional damper having only the elastic force. As a result, the damper can be downsized, and tuning can be facilitated by increasing the adjustment elements (elastic force and frictional force).

Next, a modification of the hybrid damper 1 according to the first embodiment described above will be described with reference to FIG. Here, FIG. 3 is a figure which shows the modification of the hybrid damper which concerns on 1st embodiment, (A) is an expanded partial sectional view, (B) is at the time of rightward movement, (C) is at the time of leftward movement , Shows. In addition, about the same component as 1st embodiment mentioned above, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

In the modification of the first embodiment shown in FIGS. 3A to 3C, the thin-

walled portions

31d and 32d of the first plate-like elastic body 31 and the second plate-like elastic body 32 in the first embodiment are omitted. Is. That is, in such a modification, the first plate-like elastic body 31 and the second plate-like elastic body 32 are formed in a flat plate shape like the third plate-like elastic body 33 of the first embodiment. Further, the

insertion holes

31a, 32a, 33a of the first plate-like elastic body 31, the second plate-like elastic body 32, and the third plate-like elastic body 33 have diameters from the retainer 93 side toward the flange portion side of the inflator 92. It is formed to be large.

Also with this configuration, as shown in FIGS. 3B and 3C, the first plate-like elastic body 31 and the second plate-like elasticity are formed according to the same principle as the hybrid damper 1 according to the first embodiment described above. The body 32 and the third plate-like elastic body 33 move relative to each other with respect to the retainer 93 and can generate a frictional force on the contact surface of each plate-like elastic body 3, and by the side wall of the recess 93 b of the retainer 93. Elastic force can be generated and vibration can be attenuated.

Next, the hybrid damper 1 according to the second embodiment of the present invention will be described with reference to FIGS. Here, FIG. 4 is a view showing a steering wheel having a hybrid damper according to the second embodiment of the present invention, in which (A) is a plan view and (B) is an exploded sectional view of parts. 5 is a detailed explanatory view of the hybrid damper shown in FIG. 4, (A) is an enlarged partial sectional view, (B) shows a rightward movement, and (C) shows a leftward movement.

The vibration suppression object S is a steering wheel, as in the first embodiment described above. The hybrid damper 1 according to the second embodiment is attached to a core metal 96 of a steering wheel. More specifically, the core metal 96 has a flat plate portion at the center portion of the steering wheel connected to the steering shaft, and the hybrid damper 1 according to the second embodiment is mounted on the flat plate portion of the core metal 96. It is done. Here, although the hybrid damper 1 is attached to the upper surface side of the flat plate portion of the core metal 96, it may be attached to the lower surface side.

As shown in FIGS. 4A and 4B, a rectangular plate shape having a support column 2 inserted through the insertion hole 96 a of the core metal 96 and an insertion hole 3 a inserted through the body portion 21 of the support column 2. The elastic body 3 and the stopper 4 that restricts the axial movement of the plate-like elastic body 3 are configured. The support column 2 is inserted into the insertion hole 96 a from the lower surface side of the core metal 96 and positioned by bringing the head portion 22 into contact with the lower surface of the core metal 96. The plate-like elastic body 3 is connected to the upper surface of the cored bar 96 by screwing a nut 23 into the trunk portion 21 of the column 2 inserted through the insertion hole 3a. Therefore, the plate-like elastic body 3 is restricted from moving in the axial direction by the head portion 22 and the nut 23 of the column 2, and these constitute the stopper 4.

As shown in FIG. 5A, the steering wheel (including the cored bar 96 forming the skeleton) that is the vibration suppression target S has an insertion hole 96a for inserting and fixing the support column 2, The insertion hole 96a is enlarged in diameter toward the distal end side of the support column 2 (the side opposite to the head portion 22 of the support column 2). That is, the insertion hole 96a has a substantially conical surface. When the support column 2 is inserted into the insertion hole 96a, the support column 2 can be inclined along the inclined surface of the insertion hole 96a, and can be moved relative to the vibration suppression object S.

The plate-like elastic body 3 includes a cylindrical shaft portion 3b disposed along the outer periphery of the support column 2, an edge portion 3c disposed on the outer periphery of the shaft portion 3b, and the shaft portion 3b and the edge portion 3c. The friction generating portion F is constituted by the lower surface of the shaft portion 3b and the edge portion 3c. Moreover, the hybrid damper 1 according to the second embodiment attenuates the vibration of the damping object S using the plate-like elastic body 3 as a damper mass. Therefore, a mass body 3e made of iron or lead is disposed inside the edge 3c of the plate-like elastic body 3. The plate-like elastic body 3 is configured such that the insertion hole 3 a is inserted into the body portion 21 of the column 2 inserted through the insertion hole 96 a of the core metal 96, and the nut 23 is tightened so that the shaft portion 3 b is attached to the surface of the core metal 96. It is pressed.

As shown in FIG. 5B, when the column 2 swings in the right direction in the figure, the column 2 presses the plate-like elastic body 3 and moves it in the right direction. At this time, since the mass body 3e is arranged on the edge 3c of the plate-like elastic body 3, not only the elastic force of the material (rubber) but also the elastic force is applied by the spring mechanism in the thin-walled portion 3d. The shaped elastic body 3 attenuates the vibration of the damping object S. Further, since the shaft portion 3b is pressed against the surface of the core metal 96 by the nut 23, the plate-like elastic body 3 slides to the right while deforming when the plate-like elastic body 3 moves to the right direction. The shaft portion 3 b and the edge portion 3 c generate a frictional force in the left direction on the contact surface with the cored bar 96. Therefore, the plate-like elastic body 3 according to the second embodiment can attenuate the vibration of the vibration control object S by both the elastic force and the frictional force.

Further, as shown in FIG. 5C, even when the support column 2 swings in the left direction in the figure, the elastic force and the frictional force are caused by the same action as in the above-described rightward swing. The vibration of the vibration control object S can be attenuated by both.

Next, a modification of the hybrid damper 1 according to the above-described second embodiment will be described with reference to FIG. Here, FIG. 6 is a figure which shows the modification of the hybrid damper which concerns on 2nd embodiment, (A) has shown the 1st modification, (B) has shown the 2nd modification. In addition, about the same component as 2nd embodiment mentioned above, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

6A shows a first modification of the hybrid damper 1 according to the second embodiment, in which the insertion hole 96a of the core metal 96 is formed by a cylindrical surface. The insertion hole 96a in the first modified example is formed to be larger than the diameter of the body portion 21 of the support column 2, and is configured so that the support column 2 can vibrate left and right. Also with this configuration, as in the first embodiment described above, the vibration of the vibration control object S can be attenuated by both the elastic force and the frictional force.

A second modification of the hybrid damper 1 according to the second embodiment shown in FIG. 6 (B) is one in which the plate-like elastic body 3 is constituted by a plurality of plate-like bodies. The illustrated plate-like elastic body 3 has a lower plate-like elastic body 34 arranged on the upper surface side of the core metal 96 and an upper plate-like elastic body 35 arranged on the nut 23 side, and has a lower plate-like elasticity. Between the body 34 and the upper plate-like elastic body 35, a plate-like mass body 36 constituting a damper mass is arranged.

The insertion hole 36a of the plate-like mass body 36 is formed to have substantially the same size as the diameter of the trunk portion 21 of the support column 2 and is configured to be movable as the support column 2 swings. Further, the insertion holes 34 a and 35 a of the lower plate-like elastic body 34 and the upper plate-like elastic body 35 are formed larger than the diameter of the trunk portion 21 of the column 2 so that they can move relative to the plate-like mass body 36. It is configured. According to this configuration, between the lower plate-like elastic body 34 and the plate-like mass body 36, between the upper plate-like elastic body 35 and the plate-like mass body 36, and between the lower plate-like elastic body 34 and the core metal 96. A frictional force can be generated at the contact surface between them.

In the hybrid damper 1 according to the first embodiment, the second embodiment, and the modifications described above, the frictional force includes the size of the contact area, the surface roughness of the contact surface, the type of material, and the tightening force of the nut 23. It can be arbitrarily adjusted by, for example. In the hybrid damper 1 according to the first embodiment described above, the elastic force of the spring mechanism formed by the thin portion 31d of the first plate-like elastic body 31 can be set from the mass of the inflator 92 by calculation or experiment. preferable. Further, the elastic force of the spring mechanism constituted by the thin portion 32 d of the second plate-like elastic body 32 is the first plate-like elasticity to the elastic force of the spring mechanism constituted by the thin-walled portion 31 d of the first plate-like elastic body 31. It is preferable to set the value larger than the value obtained by adding the frictional force generated at the contact surface between the body 31 and the second plate-like elastic body 32.

The present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the spirit of the present invention, for example, the vibration suppression object S may be an article other than the steering wheel. .

DESCRIPTION OF SYMBOLS 1 Hybrid damper 2 Support | pillar 3 Plate-like elastic body

3a Insertion hole

3b Shaft portion

3c Edge portion 3d Thin-walled portion 3e Mass body 4 Stopper 21 Body 22 Head 23 Nut 31 First plate-like elastic body 32 Second plate-like elastic body 33 Third plate-like

elastic bodies

31a, 32a,

33a Insertion holes

31b,

32b Shaft portions

31c,

32c Edge portions

31d, 32d Thin-walled portions 31i, 32i, 33i Opening portions 33k Notches 34 Lower plate-like elastic bodies 35 Upper plate-like elastic bodies 36 Plate-

like mass bodies

34a, 35a, 36a Insertion hole 91 Air bag 92 Inflator 93 Retainer 94 Bag ring 95 Module cover 96

Core metal

91a, 92a, 93a, 94a, 96a Insertion hole 93b Recess 93c Projection

Claims

A strut connected to the object to be controlled so as to be relatively movable;
A rubber plate-like elastic body having an insertion hole that can be inserted into the support;
A stopper for restricting the axial movement of the support column of the plate-like elastic body,
The plate-like elastic body has a friction generating portion that generates a frictional force when the struts are relatively moved,
A hybrid damper characterized in that the vibration of the object to be damped is attenuated by utilizing the elastic force of the plate-like elastic body and the frictional force of the friction generating portion.
The plate-like elastic body includes a cylindrical shaft portion disposed along the outer periphery of the support column, an edge portion disposed on the outer periphery of the shaft portion, and a thin wall portion connecting the shaft portion and the edge portion. The hybrid damper according to claim 1, wherein the friction generating portion is configured by a surface of the shaft portion or the edge portion.
The hybrid damper according to claim 1 or 2, wherein a plurality of the plate-like elastic bodies are inserted through the support columns.
4. The hybrid damper according to claim 3, wherein the plurality of plate-like elastic bodies that are inserted are formed so that the diameters of the insertion holes are different from each other.
The vibration control object has an insertion hole for inserting and fixing the support column, and the insertion hole has a diameter larger than that of the support column to be inserted, or the tip side of the support column The hybrid damper according to claim 1, wherein the diameter of the hybrid damper is increased.
The hybrid damper according to claim 1, wherein the vibration suppression object is a steering wheel.