JPH0529565Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a vibration isolating device for preventing vibration transmission, which is applied when installing vibrating equipment such as diesel engines and air compressors. be.

[Conventional technology]

Conventionally, a plurality of first vibration isolators are provided to support support portions at a plurality of locations of an equipment mounting base on an installation base, and a plurality of backing members are arranged and fixed along the peripheral edge of the equipment mounting base on the installation base. , a plurality of second vibration isolators interposed between the backing member and the equipment mounting base, and a third vibration isolator interposed between the upper backing plate of the equipment mounting base and the mounting base. According to Japanese Patent Publication No. 58-48786, the first to third vibration isolators absorb vertical, horizontal, and longitudinal vibrations of the equipment mounting base and prevent the transmission of equipment vibrations. The disclosed vibration isolator is known.

[Problem that the invention attempts to solve]

However, the conventional vibration isolating device supports a heavy mounting base for fixing equipment with a first vibration isolator placed between the mounting base and the installation base, and also prevents the equipment mounting base from swinging. Therefore, the structure is such that the third vibration isolator is tightened from above, so the natural frequency is high (in order to lower this natural frequency, the thickness of the first vibration isolator must be considerably thickened, (Not only does this increase the cost, but also increases the installation height of the equipment, making it unstable); Assembly adjustment, especially level adjustment of equipment mounting bases, is difficult and requires skill; and equipment weight (load) on the first vibration isolator. Since this is constantly applied, there are problems such as the first vibration isolating material becoming sagging and the first vibration isolating material sometimes having to be replaced or readjusted.

[Means for Solving the Problems] In order to solve the above-mentioned conventional problems, the vibration isolator of this invention includes an equipment mounting base having support parts at multiple locations, and a support part of this equipment mounting base is inserted. a plurality of mounting brackets configured in a box structure having an opening, the plurality of mounting brackets being arranged and fixed on an installation base in a position corresponding to the mounting base support; A plurality of stud bolts protruding upward through holes in the top plate in which the bolts of the mounting bracket can be freely moved are provided in the supporting portion of the equipment mounting base to be inserted into the opening, and the upper end threaded portion of each of the stud bolts is A compression spring with a strong spring force capable of supporting the total weight of the equipment and the mounting base is provided between the spring receiving plate and the mounting bracket, which is provided with an adjusting nut screwed onto the adjusting nut and a spring receiving plate interposed below the nut. interposed, and the vertical spacing and the spacing along the periphery of the mounting base support part in each of the mounting brackets share only the swinging motion of the device mounting base in the three axes of vertical, horizontal, and front-back directions. It is characterized by the interposition of supporting upper and lower vibration isolators and side vibration isolators.

〔Example〕

Hereinafter, the first embodiment of this invention will be explained with reference to the drawings in Figs. The support parts 1a to 1d (these support parts are inserted into the openings of the mounting bracket 4, which will be described later), which are made up of, for example, four protruding support feet, of the stand 1 have a lower end threaded part 3a inserted into each screw hole 2. As shown in the figure, a stud bolt 3 is provided which is screwed into the stand. 4 are support parts 1a to 1d of the device mounting base 1;
A plurality of mounting brackets (four in the illustrated example) are arranged and fixed on the installation base 5 as shown in FIG. 4b, 4c, a back plate 4d, a top plate 4e, and an opening into which the support parts 1a to 1d of the equipment mounting base 1 are inserted. This metal fitting bottom plate 4a
By tightening the three-sided protruding flange 4f with a plurality of bolts 6, it is arranged and fixed on the installation base 5 as shown in the figure. In addition, the top plate 4 of each mounting bracket 4
A top plate hole 7 with a floating hole diameter larger than the diameter of the stud bolt 3 is provided in e, and the stud bolt 3 is inserted above the mounting bracket 4 through the top plate hole 7 as shown in FIGS. 1 and 2. protrudes vertically.

Reference numeral 8 indicates an adjusting nut which is screwed onto the upper end threaded portion 3b of each stud bolt 3, and reference numeral 9 indicates a spring receiving plate inserted under this nut so as to be able to be tightened and moved. A compression spring 10 with a strong spring force capable of supporting the total weight of the equipment and the mounting base is interposed between the stud bolt 3 and the stud bolt 3. For example, when the compression spring 10 supports a load of 2400Kg with 8 springs (1 spring supports a load of 300Kg)
(When supporting a load of kg), a compression coil spring with a spring outer diameter of 40 mm, a spring inner diameter of 20 mm (wire diameter 10 mm), and a free length of 60 mm is used.

Inside each of the mounting brackets 4 are mounting base support parts 1a to 1.
d Upper and lower vibration isolators 11 and 12 interposed in the upper gap between the lower surface and the metal fitting top plate 4a and the lower gap between the lower surface of the mount support parts 1a to 1d and the metal bottom receiving plate 4a, and the mount support part. Both left and right sides of 1a to 1d and metal fittings side plates 4
b, 4c and between the end faces of the mount supports 1a to 1d and the metal back plate 4d, side vibration isolators 13, 14, 15 are interposed in the space along the periphery. Vibration isolating materials 11 and 12 and side support vibration isolating material 1
3 to 15 are configured to share and support only the swinging motion of the device mounting base 1 in three axial directions: vertical direction, horizontal direction, and front-back direction. In addition, each of the above-mentioned vibration isolating materials 1
1 to 15 are made of a vibration-proof elastic material such as rubber, and the vibration-proof material 11 interposed between the metal fitting top plate 4e and the mounting base supports 1a to 1d has an insertion hole for a stud bolt 3 as shown in FIG. , are provided as shown in FIG.

4 to 6 show a second embodiment in which the four corners of the device mounting base 1 are used as mounting base support parts, and the mounting brackets 4' corresponding to the four corners of the mounting base 1 are attached to the mounting base corner parts. hook-shaped side plates 4g and 4h along the bottom plate 4a and top plate 4e, openings into which the four corner supports of the device mounting base 1 are inserted, and a three-sided protruding flange 4f of the bottom plate 4a. The box structure has an integral or separately assembled box structure with two corner faces open, and side anti-vibration materials 13a are provided at intervals along the periphery of the metal fitting side abutment plates 4g, 4h and the corner portions of the mounting base. , 15a
are interposed as shown in FIG. 6, and the upper space between the upper surface of the corner of the mounting base and the metal fitting top plate 4a and the lower space between the lower surface of the corner of the mounting base and the metal bottom receiving plate 4a in the mounting metal fitting 4'. Upper and lower vibration isolators 11 and 12 are interposed between the upper and lower vibration isolators 11 and 12, and the side vibration isolators 13a and 15 allow the device mounting base 1 to be moved in the three axial directions of the vertical direction, left and right direction, and front and rear direction. It is configured to share and support only the swinging motion. Note that the other configurations and operations are similar to those of the embodiment shown in FIGS. 1 to 3, so the same parts are given the same reference numerals and detailed explanations will be omitted.

[Effect of idea]

The vibration isolator of this invention is as described above, in which a mounting base for fixing the equipment is supported entirely by a strong compression spring through stud bolts erected on the supporting part of the mounting base, and is inserted in the mounting bracket. The vibration isolating material has a structure that supports only the swinging motion of the equipment mounting base in the three axes (vertical direction, horizontal direction, and front/rear direction), so the following effects can be achieved.

(1) The natural frequency can be kept low (this is possible by increasing the length of the stud bolt and compression spring.) (2) Assembly adjustment, especially level adjustment of the equipment mounting base, can be done by tightening the nut at the top of the bolt. Do it easily,
No skill is required for the adjustment work.

(3) Since the vibration isolating material inside the mounting bracket (the vibration isolating material under the mounting base support) is not constantly loaded like the conventional first vibration isolating material, low-cost vibration isolating materials can be used.
There is no deterioration in performance due to fatigue or aging of the vibration isolating material. Therefore, there is no need to replace or readjust the vibration damping material from time to time.

[Brief explanation of the drawing]

Figure 1 shows the main parts of the device of the present invention. Figure 3A-
2 is a cross-sectional view taken along the line B-B in FIG. A layout plan view of a vibration isolator showing another embodiment as a support part, FIG. 5 is a longitudinal cross-sectional view of the main part taken along the line C-C in FIG. 4, and FIG. 6 is a view taken along the line D-D in FIG. 5. FIG. 1...Equipment mounting base, 1a to 1d...Supporting part of the mounting base, 3...Stud bolt, 3b...Top threaded part of the bolt, 4, 4'...Mounting bracket, 5...
Installation base, 6...Mounting bracket fixing bolt, 7...Bracket top plate hole, 8...Adjustment nut, 9...Spring receiving plate, 10...Compression spring, 11...Top and bottom vibration isolators, 13-15, 13a, 15a... side support vibration isolating material.

Claims (1)

[Scope of utility model registration request] The box structure includes an equipment mount having support parts at multiple locations and an opening into which the support parts of the equipment mount are inserted, and is arranged on the installation base in a position corresponding to the support parts of the mount. A plurality of fixed mounting brackets and a plurality of bolts that are erected on the supporting part of the equipment mounting base inserted into the openings of the respective mounting brackets and protrude upward through the top plate holes in which the bolts of the mounting brackets are movable. A stud bolt, an adjusting nut screwed onto the upper end threaded portion of each stud bolt, a spring receiving plate interposed below the nut, and a structure surrounding the stud bolt between the spring receiving plate and the mounting bracket. A compression spring with a strong spring force capable of supporting the total weight of the interposed equipment and the weight of the mount, and a device mount interposed in the upper and lower spaces and the space along the periphery of the mount support in each of the mounting brackets. A vibration isolator for equipment installation, comprising vertical vibration isolators and side vibration isolators that share and support only the vibrations in the three axes of vertical, horizontal, and longitudinal directions.