JP2526310B2 - Anti-vibration equipment for machinery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention mainly relates to a mechanical instrument that causes mechanical vibration,
The present invention relates to a vibration absorbing device for absorbing vibration, which is interposed between a plurality of foundations.

[Prior Art] In a conventional vibration isolator, rubber is interposed between a pair of metal plates, and each metal plate is supported on the lower surface of the device and the upper surface of the foundation. Then, the respective vibration isolator has been manufactured according to the weight of the device and the like.

Also, as a multi-layered anti-vibration device,
There was a "rubber shock absorber" described in Japanese Utility Model Publication No. 46-37378. In this invention, the flat surface of one metal plate is formed in a rectangular shape, and a corrugated rubber material is arranged on at least one surface of the metal plate, and a corrugated rubber material that matches the corrugation of the corrugation is formed on the surface of another metal plate of the same shape. It has been proposed to arrange them and use them for rubber loosening devices for railroad cars and shock absorbers for car bumpers.

Furthermore, as another one in which a plurality of vibration isolator is laminated and used, "buffer rubber" described in Japanese Utility Model Publication No. 35-32033
It has been known that at least one flat circular metal plate is provided with a plurality of annular convex strips, and the other metal plate having the same shape is provided with a concave groove that matches one convex strip.

[Problems to be solved]

The first conventional vibration isolator is troublesome to mount on the equipment, and it is necessary to manufacture vibration isolator having different thicknesses for different loads. Further, there is a defect that the deformation amount of the elastic rubber is small with respect to a comparatively small vibration load, and the vibration damping effect is small.

The "rubber shock absorber" of the second conventional type device utilizes not only the compressive deformation of rubber but also the sliding friction between elastic bodies in order to absorb the impact force at the time of collision. for that reason,
Although it has a structure that absorbs a large impact force by providing convex and concave grooves with a trapezoidal cross section, it is not possible to expect sufficient elastic deformation against normal mechanical vibration. It was Further, there is a drawback that the structure for supporting a plurality of rubber cushions becomes complicated.

Next, since the end surface of the third invention, "buffer rubber", is a convex chevron with a gentle chevron, deformation causes friction on the contact surface. However, there is a possibility that rubber may be damaged at the friction portion, and there is a defect that durability is lacking.

Therefore, the present invention adopts the following configuration in order to eliminate all such conventional drawbacks.

[Means for solving the problem]

The vibration isolator of the machine tool of the present invention is provided with a rigid disc 2 having a central hole 1 through which a bolt can be inserted, and a central hole 3 concentric with the central hole 1 and connected to both sides of the circular plate. The front side rubber molding 5 and the back side rubber molding 6 are formed, and concave portions and convex ridges are alternately concentrically arranged on the outer side in the radial direction of the central hole 1, and both rising wall surfaces of the convex ridge are provided. And both falling wall surfaces of the recess are formed parallel to the axis of the central hole, and one recess of the front side rubber molding and the back side rubber molding formed on the same radius thereof has the other The projections have a matching relationship so that they can be fitted, and the widths of the recesses and the widths of the projections are substantially the same. And the same anti-vibration device. When stacked without load, only one of the recesses and ridges having the above-mentioned matching relationship is seated, and gaps having different heights are formed between the plurality of other recesses and ridges. It is characterized by.

[Action / effect]

The vibration isolator of the present invention is one in which an appropriate number of the same vibration isolator 7 is fitted and laminated to each other as shown in FIG. 4, and one of the upper and lower vibration isolator in the laminated state. The ridges and the recesses are in contact with each other, and the contact state is such that the side walls of the ridges and the side walls of the recesses are completely fitted to each other, and the fitting portions are formed parallel to the axis. The directional vibration isolator can remain integral. Therefore, the deformation is easy and the anti-vibration effect is large.

Further, since the clearances H _{1 to} H ₃ between the convex stripes and the concave portions are all different in the laminated state as shown in FIG. 5, when the vibration load of the machine tool 8 is relatively small, the convex portions and the concave portions of the adjacent vibration isolator are formed. A large gap is formed between them and the supporting area of the vibration isolator becomes small, so that the amount of deformation with respect to the load is increased and a small vibration load can be sufficiently absorbed.

Further, under a large load, the support area of the vibration isolator becomes large, and it can be sufficiently supported. Moreover, even if deformation occurs due to a load, friction does not constantly occur on the contact surface like a conventional rubber shock absorber or a rubber shock absorber, and durability is good.

Furthermore, the bolt 10 protruding from the mechanical device 8 is attached to the vibration isolator.
The antivibration device 7 can be held at a predetermined position by inserting the antivibration device 7 into the center hole 1 of the device 10. That is, this vibration isolator has a central hole 1
Since it exists, its installation is extremely easy.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an axial sectional view showing an example of the present vibration isolator.
FIG. 4 is a front view thereof, FIG. 3 is a plan view of the same, FIG. 4 is a longitudinal sectional view showing an example of a state of use thereof, and FIG. 5 is an enlarged view of a V portion of FIG.

In the vibration isolator 7 of this embodiment, a front side rubber molding 5 and a back side rubber molding 6 are connected to the top and bottom of a disc 2 as shown in FIGS. 1 to 3. The circular plate 2 is made of a steel plate or a synthetic plate such as a hard synthetic resin material, and a center hole 3 is formed at the center thereof. The inner diameter of the center hole 3 is set so that the shaft portion of the bolt 10 shown in FIG. 4 can be inserted therethrough. The central hole does not necessarily have to be circular.

Further, the front side rubber molded body 5 and the back side rubber molded body 6 are made of synthetic rubber or natural rubber. The rubber hardness is set to an appropriate value in consideration of the load of the device and the vibration damping effect.
A plurality of ridges and recesses are formed on the surfaces of the front surface side rubber molded body 5 and the back surface side rubber molded body 6, respectively. Then, a concave portion on the rear surface side rubber molding body 6 side is formed so as to align with a convex strip on the front surface side rubber molding body 5 side located at the same radius from the center,
A convex strip on the back surface side rubber molded body 6 side is formed so as to be aligned with the recessed portion on the front surface side rubber molded body 5 side. In this embodiment, two ridges are formed, but the number of ridges is not limited to this, and it is also possible to form three or four ridges.

Further, in this embodiment, the height of each convex strip and the height of the concave portion from the disc 2 are different for each different radius. As shown in FIG. 4, when the same vibration isolator 7 is piled up, the gaps 12 formed between the ridges and the recesses are set to different values.

That is, in FIG. 5, the heights of the gaps H _{1 to} H ₃ are different from each other. Furthermore, the heights of the ridges 6a and 6b themselves are also different. By doing so, the contact area supporting the load varies depending on the magnitude of the load generated in the axial direction, and a relatively small vibration load can be reliably absorbed by sufficient deformation of the rubber.

The vibration isolator 7 thus constructed can be attached between the machine tool 8 and the base 11 in the following manner.

First, the shape steel 9 is fixed to the machine tool 8 and the base 11, respectively. An appropriate fastening member such as a bolt may be used for the shaped steel 9. Then, in this embodiment, a bolt 10 is attached to the central portion of the cross section of the die steel 9 having a hat-shaped cross section, the bolt 10 is fixed to the die steel 9 by means such as welding, and the shaft portion thereof is projected outward. Then, a plurality of vibration isolator 7 is interposed between the pair of spaced steel molds 9. Each of the vibration isolator 7 is superposed so that the convex line and the concave line thereof are aligned with each other. The shaft portion of the bolt 10 is loosely inserted into the center hole 1 of the circular hole 2 of the vibration isolator 7 at the uppermost stage and the lowermost stage. This prevents the vibration isolator 7 from expanding and contracting in the vertical direction and from moving in the radial direction.

Next, FIG. 6 is a plan view of a second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the outer periphery of the disk 2 and each rubber molded body 5, 6 has an oval shape. It was formed. A flat center hole 1 is provided on the major axis of the disc 2, and a plurality of ridges and recesses are provided concentrically with the center hole on the respective surfaces of the front-side rubber molded body 5 and the back-side rubber molded body 6. Are provided concentrically in the central hole 1, respectively. Then, the ridges of the front-side rubber molding and the recesses of the back-side rubber molding, which have the same distance from the center hole 1, are formed so as to be aligned with each other. In addition,
It is also possible to make an ellipse instead of this oval.
Further, instead of the flat center hole 1, two circular holes may be provided apart from each other on the major axis of the disc 2.

(Modification example)

The present invention is not limited to the above-mentioned embodiment, and for example, the peripheral edge of the disc 2 and the peripheral edges of the front surface side rubber molding 5 and the back surface side rubber molding 6 may be aligned.

Furthermore, the outer peripheral circle of the disc 2 may be embedded inside the front surface side rubber molding 5 and the back surface side rubber molding 6.

[Brief description of drawings]

FIG. 1 is an axial sectional view showing an example of the present vibration isolator, FIG. 2 is a front view thereof, FIG. 3 is a plan view thereof, and FIG. 4 is a longitudinal sectional view showing an example of its use state. FIG. 5 is an enlarged view of the rubber of FIG. FIG. 6 is a plan view showing another example of the present vibration isolator. 1,3 …… Center hole, 2 …… Disk 5 …… Front side rubber molded body, 6 …… Back side rubber molded body 5a, 5b, 6a, 6b …… Convex line, 5c, 5d, 6c, 6d… … Concave 7 …… Vibration isolator, 8 …… Mechanical equipment 9 …… Model steel, 10 …… Bolt 11 …… Base, 12 …… Gap

Claims (3)

(57) [Claims] 1. A rigid disc 2 having a central hole 1 through which a bolt can be inserted, and a central side hole 3 provided concentrically with the central hole 1 and connected to both sides of the circular plate. A body 5 and a backside rubber molded body 6 are provided, and concave portions and convex ridges are alternately concentrically arranged on the outer side in the radial direction of the center hole 1, and both rising wall surfaces and concave portions of the convex ridge are both falling. The wall surface is formed in parallel with the axis of the central hole, and one of the front side rubber molding and the back side rubber molding formed on the same radius thereof can be fitted with the other ridge. The widths of the recesses and the widths of the projections are substantially the same, and the difference between the protruding height of the projections and the depth of the recesses of the rubber moldings on the front and back surfaces in the matching relationship is respectively The radius of the above is different for each different radius. A machine characterized in that, when fitted together, only one of the recesses and ridges having the above-mentioned matching relationship is seated, and gaps of different heights are formed between the plurality of other recesses and ridges. Anti-vibration equipment. 2. The height according to claim 1, wherein the heights of the end faces parallel to the disc of the plurality of protrusions and recesses are all different from each other. 3. The disk assembly according to claim 1, wherein the disc 2 and the rubber moldings 5, 6 are oval or elliptical.