JP6527815B2 - Vibration control device - Google Patents

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a vibration control device used for a traveling device or the like.

  U.S. Pat. No. 5,958,015 describes an elastomeric mounting suitable for use in a suspension system for off-road vehicles. The fixture has two rigid end members held apart from one another by an intermediate tubular body of elastomeric material defining a central chamber, the body of the elastomeric material and one of the rigid end members The interface between them is uncoupled and one of the rigid end members has a tubular inner guiding portion which extends axially through the central chamber coaxially with the longitudinal axis of the tubular body over a portion of the length of the tubular body. And the outer surface of the tubular guiding portion is spaced from the inner surface of the tubular body during normal use, and one of the rigid end members further surrounds an end portion of the outer surface of the tubular body during normal use And an outer guide portion extending axially to contact an end portion of the outer surface.

Japanese Patent Application Publication No. 2002-527700

  As disclosed in Patent Document 1, as an anti-vibration tool, an anti-vibration main body made of rubber, elastomer or the like is disposed between a metal upper flange and a lower flange, and a plurality of anti-vibration main bodies are disposed in the hollow portion of the anti-vibration main body. It is known that a link chain that links links is equipped. Such an anti-vibration tool is designed to exhibit the anti-vibration function mainly when it receives a compressive load, and it prevents the tensile load from acting on the anti-vibration tool in the suspension system of off-road truck etc. A chain is provided to internally connect the upper and lower flanges to prevent damage to the vibration body.

  There is a need for a vibration-proof device that exhibits a vibration-proof function when it receives a compressive load with a simple configuration that is suitable for small-sized and compact traveling devices such as Snow Scoot, not large-sized traveling devices such as off-road trucks. There is.

  One aspect of the present invention is a disk-shaped high rigidity disk-shaped flange plate and a pair of flange plates sandwiched by a pair of flange plates and having a smaller diameter than the pair of flange plates. It has a plurality of fibers knitted in a hose shape, covering the area in a constricted state. The plurality of fibers are fixed at both ends to the pair of flange plates and arranged to be inclined in the range of 30 degrees to 60 degrees with respect to the central axis passing through the centers of the pair of flange plates near the center of the vibration isolation body. . With respect to the extension of the vibration-proof body sandwiched between a pair of flange plates, cover it in a state where the center between the flange plates is constricted like a drum or a thread winding, and further 30 to 60 degrees with respect to the central axis A plurality of fibers provided so as to tilt in the range can resist and prevent the anti-vibration main body from extending. Furthermore, with this configuration, it is possible to suppress a movement in which the anti-vibration main body is twisted or in any case (a pair of flange plates is shifted (eccentric) with respect to the central axis). Therefore, it is possible to provide a vibration control device in which the vibration control body only moves mainly in the shrinking direction. Furthermore, this anti-vibration device moves only in the contracting direction against bending force such that compressive force acts on the eccentric position of the flange plate.

  Furthermore, this vibration damping device can be provided as a vibration damping device for mainly absorbing a compressive load by covering the periphery with fibers without incorporating a complicated link mechanism. Therefore, with a simple configuration, it can be compact, can be combined into a scale, and can be provided at low cost.

  Furthermore, in this vibration damping device, a plurality of fibers that allow only the movement in the shrinking direction do not extend with the movement of the pair of flange plates, and the movement of the vibration damping body is restricted. Therefore, a jig for connection with another member, for example, a bolt and a nut, is attached to a pair of flange plates to obtain vibration-proof performance without providing a gap between the flange plate and the other members. Can.

  A typical example of the vibration isolation body is a cylindrical silicone rubber, which may be spherical or coma. Although it is excellent in low temperature characteristics, silicon rubber with low mechanical strength can be applied to the vibration isolation body of the vibration isolation device, and a vibration isolation device suitable for a traveling device used in a low temperature environment such as snow skit can be provided.

  A typical example of a plurality of fibers is a fiber that constitutes a blade hose, and it is also possible to use a commercially available blade hose. Therefore, the vibration control device can be provided at lower cost. The plurality of fibers may contain at least one of aramid fibers, carbon fibers and glass fibers, and aramid fibers including Kevlar fibers are preferable in that not only tensile strength but also bending durability is high. .

  In this antivibration device, the inclination of the fiber with respect to the central axis in the vicinity of the center of the antivibration main body is more preferably 40 degrees to 50 degrees, and further preferably 42 degrees to 48 degrees. In addition, this vibration damping device can easily realize a small size. For example, the diameter R1 of the pair of flange plates and the length W2 of the anti-vibration main body are preferably 5 mm to 100 mm, and more preferably about 10 mm to 50 mm.

Moreover, it is preferable that diameter R1 and length W2 satisfy the following.
0.5 <W2 / R1 <2.0 (1)
Another aspect of the present invention is a traveling device having a traveling portion and a mounting portion at least a part of which is connected by an anti-vibration device. In particular, the anti-vibration device is suitable for a traveling device having a simple configuration, and an example is a snow ski. The snowshoe has a plurality of vibration isolation devices for connecting the front and back boards and the frame, and the vibration isolation devices of the present invention are provided as vibration isolation devices of a portion required not to extend in these vibration isolation devices. An antivibration device can be applied.

The figure which explains the outline of the snow skit. Fig.2 (a) is the figure which looked at the anti-vibration apparatus from the upper direction, FIG.2 (b) is a side view of the anti-vibration apparatus, The figure which left the fiber line from the centerline in order to show internal structure. The figure explaining the installation state of each fiber. The figure which shows a mode that a vibration isolator is manufactured.

  FIG. 1 shows an outline of a snow ski that is an example of a traveling device. The snow skit 1 is a traveling device (sliding device) that can ride while standing on a sliding board and enjoy sliding on a snow slope such as a slope while controlling the traveling direction with a steering wheel. The snow skit 1 is connected to the two boards 2 and 3 which are traveling units arranged in front and rear and traveling in contact with the snow surface by a frame 8 which is a mounting unit for mounting a user, and two boards Control the 2 and 3 angles, together with the weight of the board 2 and / or the board 3 by weight to push the side curve of the board against the snow surface, draw an appropriate curve and slide in the desired direction be able to.

  In order to make board 2 and / or board 3 as intended in such a snow skit 1, frame board 5 for connecting each board 2 and 3 and frame 8 to each board 2 and 3 and Different performances are required for the vibration isolation devices 10 and 11 connecting them with 6. For example, boards 2 and 3 and frame boards 5 and 6 are connected via vibration isolation devices 10 and 11 at four locations, front, rear, left and right, respectively. Of these vibration isolators 10 and 11, the vibration isolators 10 before and after the handle 4 useful for adding weight to the boards 2 and 3 can absorb vibration and load only in the compression direction without stretching. Desirably, it is desirable that the pull be immediately transmitted to the boards 2 and 3.

  An example of the vibration isolation device 10 is shown in FIG. Fig.2 (a) shows a mode that the damping device 10 was seen from the upper direction, and FIG.2 (b) has shown a mode that the damping device 10 was seen from the side. Further, the right side from the center line (central axis) 19 shows the appearance of the vibration damping device 10 covered with the fiber network 20, and the left side shows the inner configuration of the fiber mesh 20 of the vibration damping device 10. It shows the state except 20.

  The vibration damping device 10 is a rigid disk-like pair of flange plates 11a and 11b, is sandwiched between the pair of flange plates 11a and 11b, and has a columnar vibration damping main body 12 having a smaller diameter than the pair of flange plates 11a and 11b. , And a fiber network 20 covering the pair of flange plates 11a and 11b and the vibration-proof main body 12. The flange plates 11a and 11b are made of rigid metal, for example, stainless steel or aluminum having a thickness of about 1 mm or 2 to 5 mm, and a jig for connecting with other members is attached . In the vibration damping device 10 of this example, the shaft 16 having a bolt 18 or a nut 17 at its tip is attached to the flanges 11 a and 11 b.

  The anti-vibration main body 12 of the anti-vibration device 10 of this embodiment is a cylindrical silicon rubber having a smaller diameter than the flange plates 11 a and 11 b. Both ends 12a and 12b of the cylindrical silicon rubber 12 may be bonded to the flange plates 11a and 11b, or may be in close contact with each other. Also, both ends 12a and 12b may be extended so as to surround flange plates 11a and 11b and be integral with flange plates 11a and 11b. The cylindrical anti-vibration main body 12 and the upper and lower flange plates 11a and 11b are assembled such that the central axis 19 passes through the respective centers.

  The fiber net 20 has the cylindrical vibration-proof main body 12 in a state where the center 25 (in the middle or near the middle of the flange plates 11a and 11b) 25 is constricted, that is, in the form of a coil or a drum, the flange plates 11a and 11b and It is a fiber net 20 that covers the anti-vibration main body 12. More specifically, the fiber network 20 is a blade hose 20 in which a plurality of orthogonal fibers 21 are knitted in a hose shape. The blade hose 20 is knitted so that the fibers 21 in each direction cross at 45 degrees with respect to the longitudinal direction, and both ends 23a and 23b are fixed to the pair of flange plates 11a and 11b with an adhesive. There is.

  FIG. 3 shows how some fibers 21 of the blade hose 20 covering the cylindrical silicone rubber 12 serving as the vibration isolation body are arranged by extracting some of the fibers 21. As shown in FIG. 3B, the diameter R2 of the cylindrical silicon rubber 12 is smaller than the diameter R1 of the flange plates 11a and 11b, and the blade hose 20 of which both ends 23a and 23b are fixed to the flange plates 11a and 11b. Each fiber 21 is diagonally connected to a central axis 19 passing through the center of the flange plate 11a and the center of the flange plate 11b. For this reason, as shown in FIG. 3A, each fiber 21 passes linearly (within the circumference, inside) of the flange plates 11a and 11b linearly at the shortest distance, and in the vicinity of the center, that is, the flange plate 11a. And near the middle 25 of the cylindrical silicon rubber 12 extend close to or in contact with the middle near 15 of the cylindrical silicon rubber 12. For this reason, the fiber net (blade hose) 20 constituted by the plurality of fibers 21 covers the flange plates 11a and 11b sandwiching the silicone rubber 12 in a drum shape in a state where the center vicinity 25 is constricted.

  In the vibration damping device 10, since the flange plate 11a and the flange plate 11b are connected linearly by the plurality of fibers 21, the distance between the flange plates 11a and 11b does not extend. Therefore, even if a tensile force is applied between the flange plates 11a and 11b, the distance between the flange plates 11a and 11b does not extend. For this reason, the vibration damping device 10 does not extend as a whole even when a tensile load is applied.

  Further, the flange plates 11a and 11b obliquely intersect with the central axis 19 and are connected by a plurality of linearly extending fibers 21, and the flange plates 11a and 11b are connected so as not to rotate in both directions. It is done. Therefore, even if a twisting force acts between the flange plate 11a and the flange plate 11b, the flange plates 11a and 11b do not rotate, and the vibration damping device 10 does not generate a twist around the central axis 19.

  Furthermore, the flange plates 11 a and 11 b obliquely intersect with the central axis 19 and are connected by a plurality of linearly extending fibers 21, and the flange plates 11 a and 11 b are displaced with respect to the central axis 19. Does not occur. Therefore, even if a force is applied between the flange plate 11a and the flange plate 11b (shifting with respect to the central axis 19, moving movement, lateral deviation, or side thrust), the vibration damping device 10 is Movement does not occur.

  On the other hand, the flange plates 11a and 11b shrink along the central axis 19 while receiving the elastic force of the silicone rubber 12 while hardly receiving the resistance of the plurality of fibers 21, and the elastic force of the silicone rubber 12 Return to the state. Therefore, the vibration-proof device 10 is a vibration-proof device 10 having no elongation, no twist, and no imitation, and the vibration-proof property utilizing the elasticity of the silicone rubber 12 as an elastomer only in the direction of contraction. It is the vibration proof device 10 which exhibits.

  In order to take advantage of the elasticity of the silicone rubber 12, it is desirable that the plurality of fibers 21 not be adhesively bonded to the silicone rubber 12. Furthermore, in order to regulate the movement of the flange plates 11 a and 11 b by the plurality of fibers 21, it is desirable that the plurality of fibers 21 not be in contact with the silicone rubber 12. In order to regulate the movement of the flange plates 11a and 11b, it is desirable to use a fiber 21 having high tensile strength and high resistance to bending. For example, aramid fibers (including Kevlar fibers) are suitable. Carbon fibers and glass fibers having high tensile strength may be used, but in consideration of bending durability, aramid fibers are preferable. The fibers 21 may be of a hybrid type comprising aramid fibers and carbon fibers.

  In this antivibration device 10, the plurality of fibers 21 are arranged obliquely with respect to the central axis 19 to prevent extension, twisting and irritation between the flanges 11a and 11b. The inclination θ of the fibers 21 with respect to the central axis 19 is desirably 30 degrees to 60 degrees near the center of the silicone rubber 12. The inclination (angle) θ is more preferably 40 degrees to 50 degrees, and further preferably 42 degrees to 48 degrees. The fibers 21 are substantially linearly connected between the flanges 11a and 11b. Therefore, the angle θ is substantially the same between the flanges 11a and 11b in consideration of the projected state of the fibers 21 on the central axis 19. However, as it is braided with other fibers 21 to make up the blade hose 20, there is some angular variation under the force from the other fibers 21, especially in the area close to the flanges 11a and 11b. It may spread.

The antivibration device 10 restricts the movement of the flanges 11a and 11b by a plurality of fibers 21 arranged obliquely with respect to the central axis 19, and as described above, there is no stretching, twisting, and insistence, and only contraction. It is an anti-vibration device that moves. Therefore, adding the weight of the blade hose 20, for example, several grams, to the weight of the main body such as silicone rubber 12, only the vibration damping device 10 performing only the shrinking motion can be made more compact with a lightweight and simple configuration. realizable. For this reason, the vibration damping device 10 is suitable for a small size, for example, the diameter R1 of the pair of flange plates and the length W2 of the vibration damping body are preferably 5 mm to 100 mm, respectively, and 10 mm to More preferably, it is about 50 mm. Further, the overall shape of the vibration isolation device 10 is not limited to being too long or too wide, and it is preferable that the diameter R1 and the length W2 satisfy the following.
0.5 <W2 / R1 <2.0 (1)

  An example of diameter R1 of flanges 11a and 11b of vibration isolator 10 is 30 mm, and thickness W1 is 2-3 mm. An example of the diameter R2 of the silicone rubber 12 is 25 mm, and an example of the distance W2 between the end 12a and the end 12b is 25 mm. These numerical values are an example and are not limited to these.

It is desirable that the ratio between the diameter R1 of the flange 11a and the diameter R2 of the silicone rubber 21 serving as the anti-vibration main body satisfy the following condition.
0.5 <R2 / R1 <0.95 (2)
The lower limit of this condition is desirably 0.6, and more desirably 0.7. The upper limit is desirably 0.9, and more desirably 0.85.

  FIG. 4 shows an example of a method of manufacturing the vibration damping device 10. Assembly (vibrator main body, vibration isolator core) 10a including the flanges 11a and 11b and the silicone rubber 12 of the vibration damping main body is spirally knitted with a fiber containing at least one of aramid fiber, carbon fiber, and glass fiber While unfolding, the cylindrical blade hose 20 is put inside. Further, both ends 23a and 23b are fixed to the flanges 11a and 11b with an adhesive in a state where the blade hose 20 is stretched up and down. A blade hose 20 commercially available as a fiber mesh covering the flanges 11 a and 11 b and the silicone rubber 12 can be used. Accordingly, it is possible to provide a vibration isolation device 10 which is low in cost, stretchable, inflexible, insatiable, and performs only a shrinking motion.

  Aramid fibers, carbon fibers and glass fibers have high tensile strength and shear strength, and in particular, a blade hose 20 containing aramid fibers is suitable as the vibration damping device 10. Insert the coiled assembly 10a in which the flange plates 11a and 11b at both ends spread against the silicone rubber column 12 which is the vibration isolation body into the blade hose 20 in a non-compressed state, and pull the hose 20 in both directions. Each fiber 21 of the hose 20 extends and wraps the assembly 10a in a drum shape. It is possible to control the movable range of the enclosed silicone rubber 12 by changing the fiber angle of the blade hose 20 used for the vibration isolation device 10 and the extension state of the blade hose 20. The vibration damping device 10 can be applied to the vibration damping device 10 used in a low temperature environment, by reinforcing the fibers 21 with the silicone rubber 12 having excellent low temperature characteristics but low mechanical strength. A preferred example of a vehicle using this antivibration device 10 is a snow ski 1.

In addition, you may coat the outer side of the fiber net | network 20 with rubber etc. further. Also, it may be the vibration damping body 12 and the upper and lower flange plates (plates) 11a and 11b are becoming more integrated with an adhesive prior to cover a fiber network 20, together with the fiber network 20 without using an adhesive May be The anti-vibration main body 12 is not limited to a cylinder but may be spherical or top-like, and the spherical or top-type anti-vibration main body 12 may be a flange plate 11a by curving or denting the central portions of the flange plates 11a and 11b. The anti-vibration main body 12 may be combined at a predetermined position of the flange plates 11a and 11b without adhering to the 11b. The vibration-proof body 12 is not limited to silicone rubber, but may be another elastomeric material, or may be another type of elastic body such as a coil spring. Since the vibration proofing device 10 can be provided at a compact size and at low cost, it can be applied not only to snow skits, but also to bicycles, roller boards, small self-propelled vehicles, and the like. The antivibration device 10 can be easily enlarged in size with the same configuration, and can be used for a suspension system of an off-road vehicle or used for an antivibration device of a building.

DESCRIPTION OF SYMBOLS 1 Snow skid, 10 anti-vibration apparatus, 11a, 11b Flange plate 12 anti-vibration main body (silicon rubber)

Claims (8)

A pair of flange plates with high rigidity, and
An anti-vibration main body having a diameter smaller than that of the pair of flange plates sandwiched between the pair of flange plates;
A plurality of fibers knitted in a hose shape covering the pair of flange plates and the anti-vibration main body in a state where the vicinity of the center is narrowed, both ends thereof are fixed to the pair of flange plates, and the center of the anti-vibration main body and a plurality of fibers inclined in the range of 30 to 60 degrees with respect to the central axis passing through the center of the pair of flange plate possess around said plurality of fibers are fibers constituting the blade hose antivibration apparatus.   The anti-vibration device according to claim 1, wherein the anti-vibration main body is cylindrical.   The vibration control device according to claim 1, further comprising a connecting jig attached to the pair of flange plates.   The vibration isolation device according to any one of claims 1 to 3, wherein the vibration isolation body comprises silicone rubber. The vibration isolator according to any one of claims 1 to 4 , wherein the diameter R1 of the pair of flange plates and the length W2 of the vibration damping body are 5 mm to 100 mm, respectively. The vibration isolator according to claim 5 , wherein the diameter R1 and the length W2 satisfy the following.
0.5 <W2 / R1 <2.0 The vibration control device according to any one of claims 1 to 6 ,
A traveling device having a traveling portion and a mounting portion at least a part of which is connected by the vibration isolation device. The travel device according to claim 7 , wherein the travel device is a snow ski.

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