JP2001071916A - Steering vibration suppressing device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the fixation of an elastic support with a mass body by fitting a neck part between a first collar part and a second collar part to the cutout part of the mass body in the extended state, and nipping the periphery of the cutout part by the first collar part and the second collar part. SOLUTION: The neck part 16 between a first collar part 12 and a second collar part 13 is fitted to the cutout part of a mass body. Since the length of the neck part 16 is shorter than the depth of the cutout part, the neck part 16 is laid in the extended state by the fitting. Accordingly, the periphery of the cutout part can be strongly nipped by the first collar part 12 and the second collar part 13 with a force according to the elastic restoring force of the neck part 16. The stepped part 15 of an elastic support fixed to the mass body is inserted to the cutout part of a base plate 4, and a third collar part 14 is inserted to the lower side of the base plate 4. Since the neck part 16 of the elastic support can be surely fixed to the cutout part of the mass body, the number of part items and the manpower of work can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular steering vibration suppressing device using a dynamic damper.

[0002]

2. Description of the Related Art A steering wheel of an automobile is provided with a vibration suppressing device for suppressing resonance of the steering wheel due to vibration during operation of an engine or vibration during traveling. That is, a so-called "dynamic damper" is formed by fixing a columnar elastic support to a base plate attached to a boss of a steering wheel and supporting a heavy mass at the tip of the columnar body. It tries to suppress the vibration of the wheel.

[0003] Both ends of an elastic support supporting a mass body are, for example, as disclosed in Japanese Patent Application Laid-Open No. Sho 63-43359.
A structure in which each of the mass body and the base plate is vulcanized and bonded is employed. However, in this structure, insert molding of an elastic member such as rubber must be performed,
In addition to being disadvantageous in terms of mass productivity, there are also molding problems such as rubber mold opening, and there are many design restrictions.

Therefore, as shown in Japanese Patent Application Laid-Open No. 2-57476, flanges are formed at both ends of an elastic support for supporting a mass body, and a flange at a base end is provided between a base plate and a boss. , And the flange at the distal end is sandwiched between the mass body by a U-shaped clamp fitted to the mass body.

[0005]

However, even in the prior art having such a sandwiching structure, although there is no problem in fixing the base end of the elastic support to the base plate, it is difficult to fix the distal end to the mass body. Requires a clamp, which increases the number of parts and the number of work steps.

The present invention has been made by paying attention to such prior art, and does not increase the number of parts and the number of working steps and suppresses the steering vibration for a vehicle in which the elastic support and the mass body can be easily fixed. An apparatus is provided.

[0007]

According to the first aspect of the present invention,
A steering vibration suppressing device for a vehicle, wherein a base plate is attached to a boss portion of a steering wheel and a mass body is supported at a tip end of a columnar elastic support fixed to the base plate, a notch is formed at an edge of the mass body. Are formed, and a first flange portion and a second flange portion are formed at a tip end portion of the columnar main body of the elastic support, and the mass is obtained in a state where a neck portion between the first flange portion and the second flange portion is extended. It is fitted into the notch of the body, and the periphery of the notch is sandwiched between the first and second flanges.

According to the first aspect of the present invention, the neck between the first and second flanges is fitted into the notch of the mass body in an extended state, so that the elasticity of the neck is improved. With the force according to the restoring force, the periphery of the notch can be strongly clamped by the first flange and the second flange. Therefore, without using a conventional clamp, the neck of the elastic support can be securely fixed only by fitting it into the notch of the mass body, so that the number of parts and the number of working steps can be reduced. It is possible and the work itself is easy.

According to a second aspect of the present invention, there is provided the steering vibration suppressing device for a vehicle according to the first aspect, wherein the back surface of the first flange is gradually inclined away from the two flanges from the center outward. It is characterized by having a tapered shape.

According to the second aspect of the present invention, since the back surface of the first flange is tapered in such a manner as to gradually taper away from the two flanges from the center outward. Even when vibrating, the stress applied to the back surface of the first flange from the notch of the mass body is transmitted in a constant and dispersed state. Therefore, a secure holding force between the elastic support and the mass body is maintained, and the elastic support does not crack.

According to a third aspect of the present invention, there is provided the steering vibration suppressing device for a vehicle according to the second aspect, wherein a plurality of ring-shaped steps are formed on a tapered back surface of the first flange portion. And

According to the third aspect of the present invention, since the plurality of ring-shaped steps are formed on the back surface of the first flange, the notch and the first flange when the elastic support is inclined are formed. Prevents slipping and suppresses the swing width of the mass body.

According to a fourth aspect of the present invention, there is provided the steering vibration suppressing device for a vehicle according to any one of the first to third aspects, wherein the shape of the first flange is circular.

According to the fourth aspect of the invention, since the shape of the first flange portion is circular, the characteristic of the elastic support itself in the vibration direction can be eliminated, and vibrations in all directions can be uniformly suppressed. In addition, since the first flange has no directionality, the elastic support may be fitted into the notch of the mass body in any direction, and workability is improved.

According to a fifth aspect of the present invention, there is provided the steering vibration suppressing device for a vehicle according to any one of the first to fourth aspects, wherein a cross-sectional shape of the columnar body is circular.

According to the fifth aspect of the present invention, since the cross-sectional shape of the columnar main body is circular, the characteristic of the elastic support itself with respect to the vibration direction is eliminated as in the case of the first flange of the preceding item, and the elastic support itself is removed in all directions. Vibration can be suppressed evenly,
The workability of fitting into the notch is also improved.

According to a sixth aspect of the present invention, there is provided the steering vibration suppressing device for a vehicle according to any one of the first to fifth aspects, wherein the surface of the second flange portion is gradually increased from the center to the outside. It is characterized in that it has a tapered shape inclined in a direction away from it.

According to the sixth aspect of the present invention, the surface of the second flange portion is tapered in such a manner that it gradually slopes away from the one flange portion toward the outside from the center.
As in the case of the back surface of the flange portion, the stress applied to the surface of the second flange portion from the cutout portion of the mass body is transmitted in a constant and dispersed state, and the reliable holding force between the elastic support and the mass body is also maintained. Is done.

According to a seventh aspect of the present invention, there is provided the steering vibration suppressing device for a vehicle according to any one of the first to fifth aspects, wherein the surface of the second flange portion is gradually increased from the center toward the outside. Characterized by a tapered shape that is inclined in a direction approaching.

According to the seventh aspect of the present invention, the surface of the second flange portion is tapered in a direction opposite to that of the above-mentioned item. Since the peripheral portion of the second flange portion is always present, the stress applied to the surface of the second flange portion from the cutout portion of the mass body is substantially constant also in this case.

According to an eighth aspect of the present invention, there is provided the steering vibration suppressing device for a vehicle according to any one of the first to seventh aspects, wherein the diameter of the columnar main body in contact with the back surface of the second flange is changed to the diameter of the neck. It is the same as or larger than that.

According to the eighth aspect of the present invention, the diameter of the column-shaped main body in contact with the back surface of the second flange is equal to or larger than the diameter of the neck, so that the elastic body can be elastically moved even if the mass body shakes greatly. The support does not buckle, and the strength (durability) as the vibration suppressing device is improved.

According to a ninth aspect of the present invention, there is provided the steering vibration suppressing device for a vehicle according to any one of the first to eighth aspects, wherein the notches of the mass body are formed at the opposed edges. And

According to the ninth aspect of the present invention, since the notch portions of the mass body are formed at the opposing edges, even if a vibration input is received from either side in the opposing direction, at least one of the two sides. Will act in the direction of engagement,
The elastic support does not come off the notch. Note that, with respect to a vibration input applied in a direction orthogonal to the opposing direction, the cutouts on either side do not act in the removal direction.

According to a tenth aspect of the present invention, there is provided the steering vibration suppressing device for a vehicle according to any one of the first to ninth aspects, wherein a notch is formed in the base plate, and the notch is formed in the base end of the elastic support. A third flange is formed, the base end of the elastic support is inserted into the notch, and the third flange is sandwiched between the boss of the steering wheel and the base plate by the mounting force of the base plate. I do.

According to the tenth aspect of the present invention, the third flange formed at the base end of the elastic support is held between the boss of the steering wheel and the base plate by the mounting force of the base plate. The base end of the elastic support is securely fixed.

According to an eleventh aspect of the present invention, there is provided the steering vibration suppressing device for a vehicle according to the tenth aspect, wherein the fourth flange portion sandwiches the base plate between the columnar main body of the elastic support and the third flange portion. Is formed.

According to the eleventh aspect of the present invention, since the base plate can be sandwiched between the third flange portion and the fourth flange portion, the elastic support can be provided before the base plate is strongly attached to the boss portion. The body can be temporarily fastened to the base plate.

According to a twelfth aspect of the present invention, there is provided the steering vibration suppressing device for a vehicle according to the eleventh aspect, wherein a raised portion is formed on a back surface of the third flange portion.

According to the twelfth aspect of the present invention, since the raised portion is formed on the back surface of the third flange, the contact pressure of the third flange on the back surface of the base plate is increased, and the temporary fixing effect is increased.

According to a thirteenth aspect of the present invention, there is provided the steering vibration suppressing device for a vehicle according to the eleventh or twelfth aspect, wherein a vertical dimension of the fourth flange is increased to increase the thickness.

According to the thirteenth aspect of the present invention, since the vertical dimension of the fourth flange is increased to increase the thickness, the fourth flange can easily hit the peripheral portion of the mass when the mass vibrates. Therefore, the vibration width of the mass body is suppressed by the fourth flange portion hitting the peripheral part, and the mass body itself can be prevented from interfering with the periphery. In addition, since the mass that vibrates and falls is also applied to the fourth flange, the interference between the mass and the fourth flange also serves to reduce the angle itself at which the elastic support falls.

The invention according to claim 14 is the invention according to claims 11 to 1
3. The steering vibration suppressing device for a vehicle according to claim 3, wherein a fifth flange portion is formed between the second flange portion and the fourth flange portion of the columnar main body of the elastic support.

According to the fourteenth aspect of the present invention, since the fifth flange is formed between the second flange and the fourth flange, the fifth flange has an increased thickness. Plays the same role as. However, since the fifth flange portion is formed independently, it can be formed by selecting a portion that easily hits the peripheral portion.

[0035]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 to FIG. 5 are views showing a first embodiment of the present invention. As shown in FIG. 2, a boss 3 fixed to a steering shaft (not shown) is provided inside the horn pad 2 at the center of the steering wheel 1, and the boss 3 has a base plate 4 and an elastic support. A vibration suppressing device including a body 5 and a mass body 6 is provided.
One end 3a (see FIG. 2) of the boss 3 is formed to be upright to avoid interference with other components.
Another peripheral device 7 is located on the opposite side of the end portion 3a of the boss 3 in a close state.

The base plate 4 has a substantially "F-shaped" shape in which one end is narrow, the other end is wide, and an arc portion is formed in the center. A cutout 8 is formed outside one end and the other end of the base plate 4, and a cutout 8 is formed inside the other end. That is, the cutouts 8 are formed in a two-to-one relationship and in opposite directions. The notch 8 is formed in a state where the periphery is slightly lifted. The base plate 4 is screwed to the boss 3 by two mounting holes 9.

On the other hand, the mass body 6 also has a shape substantially corresponding to the base plate 4, and a notch 10 is formed at a position corresponding to the notch 8 of the base plate 4. Therefore, the cutouts 10 are also in a state of being opposed to each other in a two-to-one relationship. The portion of the mass body 6 where the notch 10 is formed is formed to be thin.

Next, the elastic support 5 will be described. The elastic support 5 is formed of a material having elasticity. As the material of the elastic support 5, rubber such as chlorinated butyl and isoprene, and elastomer such as ester, styrene, olefin and urethane are suitable. As the elastic support body 5, a first flange portion 12 and a second flange portion 13 are formed at a distal end portion of a columnar main body 11 having a circular cross section at a predetermined interval, and a third flange portion is formed at a proximal end portion. A flange 14 is formed. A step portion 15 that is inserted into the cutout 8 of the base plate 4 is formed in a portion of the columnar body 11 that is in contact with the third flange portion 14. Although the diameter of the columnar body 11 changes continuously in the longitudinal direction, the cross-sectional shape is circular in any part. In addition, the first flange portion 12, the second flange portion 13, the third flange portion 1
4. The steps 15 are also all circular.

The back surface 12b of the first flange portion 12 is tapered in such a manner that it gradually slopes away from the second flange portion 13 from the center to the outside. Moreover, of the columnar main body 11,
The diameter D of the columnar main body in contact with the second flange portion 13 is
It is formed to be larger than the diameter d of the neck portion 16 corresponding to between the second flange portion 13 and the second flange portion 13 (the same may be used). That is, the relationship between the two diameters D and d is D ≧ d. The length of the neck 16 is slightly smaller than the depth (thickness) of the cutout 10 formed in the mass body 6.

Next, a method of assembling the vibration suppressing device will be described. First, the neck 16 between the first flange 12 and the second flange 13 is fitted into the notch 10 of the mass body 6. Since the length of the neck 16 is smaller than the depth of the notch 10, the neck 16 is in an extended state by being fitted. Therefore, in the fitted state, the periphery of the notch 10 can be strongly clamped by the first flange 12 and the second flange 13 with a force corresponding to the elastic restoring force of the neck 16.

The base plate 4 is loosely attached to the boss 3 (see FIG. 2) with screws (not shown). Then, the step 15 of the elastic support 5 fixed to the mass body 6 is inserted into the notch 8 of the base plate 4,
The flange 14 is inserted under the base plate 4. The elastic support 5 can be fixed to the mass body 6 even when the elastic support 5
Since the base end of the base plate 4 bends freely, the work of inserting the step 15 into the cutout 8 of the base plate 4 is easy. Step 1
Since the size of the notch 5 matches the size of the notch 8, there is no play in the notch 8. Next, when the base plate 4 is attached firmly with screws, the third flange 14 is strongly clamped, and the fixation of the elastic support 5 on the base end side is also ensured.

Accordingly, since the mass body 6 is supported by the elastic support 5, the steering wheel 1
In addition, even if vibration during operation of the engine or vibration during running is applied, the generation of vibration of the steering wheel 1 can be suppressed by the dynamic damper effect due to the swing of the mass body 6. Then, the neck 16 of the elastic support 5 is connected to the notch 10 of the mass body 6 without using a conventional clamp.
, The number of parts and the number of man-hours can be reduced.

Further, according to this embodiment, the first flange 1
Since the back surface 12b of the second member 2 is tapered, the stress applied to the back surface 12b of the first flange portion 12 from the notch 10 of the mass body 6 is constant and dispersed even when the elastic support 5 is vibrating. Is transmitted. Therefore, a secure holding force between the elastic support 5 and the mass body 6 is maintained, and the elastic support 5 is not cracked.

Further, in this embodiment, since the columnar main body 11, the first flange portion 12, and the like are all circular, the characteristic of the elastic support body 5 in the vibration direction is eliminated, and vibrations in all directions are uniformly suppressed. Can be. Moreover, the mass body 6
The elastic support 5 may be fitted into the notch 10 in any direction, and workability is also improved.

In addition, since the diameter D of the columnar body in contact with the second flange 13 is formed larger than the diameter d of the neck 16,
Even if the mass body 6 shakes greatly, the elastic support body 5 does not buckle, and the strength (durability) as the vibration suppressing device is improved.

In the base plate 4 and the mass body 6, the notches 8, 10 are formed at the edges in the opposite directions, respectively. Act in the direction of engagement, so that the elastic support 5
Never get out of the way. It should be noted that the cutouts 8 and 10 on either side do not act in the removal direction with respect to the vibration input applied in the direction orthogonal to the facing direction.

FIG. 6 is a diagram showing a second embodiment of the present invention. In the second and subsequent embodiments, only the elastic support is illustrated, and other parts are omitted because they are common to the first embodiment. In the description, the same parts as those in the first embodiment will be denoted by the same reference numerals, and redundant description will be omitted.

In the elastic support 17 according to the second embodiment, a plurality of ring-shaped steps are formed on the back surface 12b 'of the first flange 12. By doing so, the elastic support 1
This has the effect of preventing the notch 10 and the first flange 12 from slipping when the 7 is tilted, and suppressing the swinging width of the mass body 6. The neck 16 has substantially the same diameter as the columnar body 11 that is in contact with the second flange 13.

FIG. 7 is a diagram showing a third embodiment of the present invention. In the elastic support 18 according to the third embodiment,
The surface 13a of the second flange 13 is tapered such that the surface 13a gradually slopes away from the first flange 12 from the center to the outside. By doing so, the second notch 10 of the mass body 6 is moved from the notch 10 as in the case of the back surface 12 b of the first flange 12.
The stress applied to the surface 13a of the flange portion 13 is transmitted in a constant and dispersed state, and the reliable holding force between the elastic support 18 and the mass body 6 is also maintained.

FIG. 8 is a diagram showing a fourth embodiment of the present invention. In the elastic support 19 according to the fourth embodiment,
The surface 13a 'of the second flange 13 is tapered in such a manner that it gradually slopes outward from the center toward the first flange 12. Also, the back surface 13b of the second flange portion 13 is tapered on the opposite side. By doing so, the elastic support 19
Even if vibrates, the portion that comes into contact with the mass body 6 is always the peripheral portion of the first flange portion 12 and the peripheral edge portion of the second flange portion 13. Back 12 of part 12
b and the stress applied to the surface 13a 'of the second flange 13 are constant. In addition, by making the back surface 13b of the second flange portion 13 have an inversely tapered shape, the root of the second flange portion 13 becomes thinner,
Since the second flange portion 13 is easily bent, the force for restoring the second flange portion 13 from the bent state is added to the force for restoring the neck portion 16 from the extended state, and the first flange portion 12 is restored. And the second
The force for clamping the periphery of the notch 10 of the mass body 6 with the flange 13 increases.

FIG. 9 is a diagram showing a fifth embodiment of the present invention. In the elastic support 20 according to the fifth embodiment,
A fourth flange 21 is formed on the step 15 of the elastic support 20, and the periphery of the cutout 8 of the base plate 4 is sandwiched between the fourth flange 21 and the third flange 14. Also,
The raised portion 22 was formed on the back surface of the third flange portion 14. By doing so, the base plate 4 is sandwiched between the third flange portion 14 and the fourth flange portion 21 so that the base plate 4
The elastic support 20 can be temporarily fixed to the base plate 4 in a state before the is strongly attached. In particular, since the raised portion 22 is formed on the back surface of the third flange portion 14, the contact pressure of the surface of the third flange portion 14 with the base plate 4 increases, and the temporary fixing effect increases. Note that a plurality of small protrusions may be formed on the back surface of the third flange portion 14 instead of the raised portion 22.

FIG. 10 is a diagram showing a sixth embodiment of the present invention. In the elastic support 23 according to the sixth embodiment, the fourth flange portion 21 'is formed thicker by increasing the vertical dimension. With this configuration, when the mass body 6 is excessively vibrated beyond the set value, the fourth flange 2
1 'hits the lower peripheral portion of the mass body 6 to suppress the vibration width of the mass body 6 and prevent the mass body 6 itself from interfering with the periphery.

FIG. 11 is a view showing a seventh embodiment of the present invention. In the elastic support 24 according to the seventh embodiment, the fifth flange 25 is formed between the second flange 13 and the fourth flange 21. By doing so, the sixth
It has the same function as the fourth flange 21 'of the embodiment. The difference from the sixth embodiment is that the fifth flange 25 is not used as the fourth flange, but is formed independently. Therefore, the fifth flange 25 is formed by selecting a place where it is easy to hit the peripheral part. There is an advantage that can be.

[0055]

According to the present invention, it is possible to securely fix the neck of the elastic support simply by fitting it into the notch of the mass body without using a conventional clamp. The number of parts and man-hours can be reduced, and the work itself is easy.

[Brief description of the drawings]

FIG. 1 is an overall view of a steering wheel showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line SA-SA in FIG.

FIG. 3 is an assembly diagram of the vibration suppression device according to the first embodiment.

FIG. 4 is an exploded view of the vibration suppression device according to the first embodiment.

FIG. 5 is a side view showing the elastic support according to the first embodiment.

FIG. 6 is a side view showing an elastic support according to a second embodiment.

FIG. 7 is a side view showing an elastic support according to a third embodiment.

FIG. 8 is a partial cross-sectional side view showing an elastic support according to a fourth embodiment.

FIG. 9 is a side view showing an elastic support according to a fifth embodiment.

FIG. 10 is a side view showing an elastic support according to a sixth embodiment.

FIG. 11 is a side view showing an elastic support according to a seventh embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 steering wheel 4 base plate 5, 17, 18, 19, 20, 23, 24 elastic support 6 mass 10 notch 11 columnar body 12 first flange 13 second flange 14 third flange 16 neck 21 4 brim 25 Fifth brim

Claims (14)

[Claims] 1. A steering vibration suppressing device for a vehicle, wherein a base plate is attached to a boss portion of a steering wheel, and a mass body is supported at a tip end of a columnar elastic support fixed to the base plate. A notch portion is formed in the portion, and a first flange portion and a second flange portion are formed at a distal end portion of the columnar main body of the elastic support, and a gap between the first flange portion and the second flange portion is formed. A steering vibration suppressing device for a vehicle, characterized in that a neck portion of the vehicle body is extended and fitted into a notch portion of a mass body, and a periphery of the notch portion is sandwiched between a first flange portion and a second flange portion. 2. The steering vibration suppressing device for a vehicle according to claim 1, wherein a back surface of the first flange portion gradually extends from a center to an outer side.
A steering vibration suppressing device for a vehicle, wherein the device has a tapered shape inclined in a direction away from a flange portion. 3. The vehicle steering vibration suppressing device according to claim 2, wherein a plurality of ring-shaped steps are formed on a tapered back surface of the first flange portion. For steering vibration suppression. 4. The steering vibration suppressing device for a vehicle according to claim 1, wherein the first flange portion has a circular shape. apparatus. 5. The steering vibration suppressing device for a vehicle according to claim 1, wherein the columnar body has a circular cross section. . 6. The steering vibration suppressing device for a vehicle according to claim 1, wherein a surface of the second flange portion gradually increases from a center to an outer side.
A steering vibration suppressing device for a vehicle, wherein the device has a tapered shape inclined in a direction away from a flange portion. 7. The steering vibration suppressing device for a vehicle according to claim 1, wherein a surface of the second flange portion gradually increases from a center toward an outer side.
A steering vibration suppressing device for a vehicle, characterized in that it has a tapered shape inclined in a direction approaching a flange portion. 8. The steering vibration suppressing device for a vehicle according to claim 1, wherein a diameter of the columnar body in contact with the back surface of the second flange is equal to a diameter of the neck. , A steering vibration suppression device for a vehicle, characterized in that it is made larger. 9. The steering vibration suppressing device for a vehicle according to claim 1, wherein a cutout portion of the mass body is formed at an opposed edge portion. Vehicle steering vibration suppression device. 10. The steering vibration suppressing device for a vehicle according to claim 1, wherein a cutout is formed in the base plate, and a third flange is formed at a base end of the elastic support. A vehicle, wherein the base portion of the elastic support is inserted into the cutout portion, and the third flange portion is sandwiched between the boss portion of the steering wheel and the base plate by the mounting force of the base plate. For steering vibration suppression. 11. The steering vibration suppressing device for a vehicle according to claim 10, wherein a fourth flange portion for sandwiching a base plate with a third flange portion is formed on the columnar main body of the elastic support. A steering vibration suppressing device for a vehicle. 12. The steering vibration suppressing device for a vehicle according to claim 11, wherein a raised portion is formed on a back surface of the third flange portion. 13. The steering vibration suppressing device for a vehicle according to claim 11, wherein a vertical dimension of the fourth flange is increased to increase the thickness. 14. The steering vibration suppressing device for a vehicle according to claim 11, wherein a second flange portion and a fourth flange portion of the columnar main body of the elastic support are provided. A steering vibration suppressing device for a vehicle, wherein a five flange portion is formed.