US2717747A

US2717747A - Chock devices for machinery bases

Info

Publication number: US2717747A
Application number: US165059A
Authority: US
Inventors: Rosenzweig Siegfried
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-05-29
Filing date: 1950-05-29
Publication date: 1955-09-13
Anticipated expiration: 1972-09-13

Description

Sept. 13, 1955 s. ROSENZWEIG 2,717,747

CHOCK DEVICES FOR MACHINERY BASES Filed May 29, 1950 4 Sheets-Sheet 1 S Rosenzweig.

INVENTOR v Sept. 13, 1955 s. ROSENZWEIG 2,717,747

CHOCK DEVICES FOR MACHINERY BASES Filed May 29, 1950 4 Sheets-Sheet 2 INVENTOR I ATTORNEY Sept. 13, 1955 s. ROSENZ'WEIG 2,717,747

CHOCK DEVICES FOR MACHINERY BASES Filed May 29, 1950 4 Sheets-Sheet 5 IN VENTOR S. Rosezzz cue r59.

Sept. 13, 1955 s. ROSENZWEIG 2,717,747

CHOCK DEVICES FOR MACHINERY BASES Filed May 29, 1950 4 Sheets-Sheet 4 INVENTOR. S. Rosenzweig United States Patent 0 CHOCK DEVICES FOR MACHINERY BASES Siegfried Rosenzweig, New York, N. Y.

Application May 29, 1950, Serial No. 165,059

1 Claim. (Cl. 248-24) This invention relates to vibration isolators and more particularly to an improved form of chock means therefor.

As generally known in the art, so-called machinery bases for preventing the transmissions of vibrations of an operating machine to a foundation, or vice versa, usually consist of an upper member, which may be, for example, in the form of an elongated frame, for supporting the base of the machine, a base plate adapted to be anchored to a foundation, and intervening vibration absorbing means for preventing the transmission of vibrations to the foundation or base plate. In order more effectively to prevent relatives sidewise or endwise movement between the upper member or frame which supports the machinery base and the base plate, particularly in connection with installations on shipboard, fan bases, or

other installations subjected to external forces manifesting themselves in a substantially horizontal plane, it is desirable to provide suitable chock means to resist such movement.

Accordingly, one of the objects of the present invention is to provide, in combination, a chock structure including an upstanding member on the base plate or foundation which constitutes a bottom abutment, and an upper abutment having a horizontal leaf portion which may be secured to a frame member, or may be a part of the frame member itself, and a vertical leaf portion, the latter cooperating with the bottom abutment through an intervening shock absorbing part to resist relative horizontal movement between the top member and the bottom member. In that connection, one of the features of the combination resides in the provision of a bottom abutment which presents at least one abutment wall for cooperation with the vertical leaf. The vertical leaf and the bottom abutment may be positioned at an angle of any desired magnitude relative to the longitudinal axis of the frame as determined by the direction of the thrust to be resisted.

A further object of the invention is to provide cooperating chock elements which may be made from conveniently available stock shapes and which may be fabricated in such a manner as to be readily carried in stock to be available for meeting the specifications of various installations.

Preferred and practical embodiments of the invention are shown in the accompanying drawings, in which:

Figure 1 is a vertical sectional view of the improved construction, the line of section being in the direction of the longitudinal axis of a frame element and the base plate to provide a single chock means to resist movement longitudinally in the direction of the frame elements;

Figure 2 is a vertical, transverse, sectional view showing the application of the invention to a structure like that of Figure l, but wherein the upper or top abutment element is turned 90 so as to resist horizontal movement at right angles to the horizontal axes of the frame elements;

Figure 3 is a vertical sectional view similar to Figure 1 showing a double-acting upper abutment member;

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Figure 4 is a vertical sectional view of a modified form of isolator using the same type of chock means shown in Figures 1 and 2;

Figure 5 is a vertical sectional view of a modified form of isolator also employing the chock means of Figures 1 and 2;

Figure 6 is a vertical sectional view showing a modified form of bottom abutment;

Figure 7 is a vertical sectional view illustrating a modification of the top abutment wherein the horizontal portion comprises a portion of a structural member such as an inverted channel and the vertical portion comprises a plate Welded to and depending therefrom;

Figure 8 is a vertical cross sectional view showing a further modification of the upper abutment member wherein the vertical portion depends from one of the flanges of 'a channel of the type shown in Figure 7, instead of from the base of the channel as shown in Figure 7;

Figure 9 is a vertical sectional view showing a modififcation of the top abutment member constituting one of the frame elements of a fan base;

Figure 10 is a vertical sectional view of a further modification.

Similar reference characters designate corresponding parts throughout the several figures of the drawings.

In its general aspect, the features of the invention common to all forms thereof include, a base plate A adapted to be secured to a foundation, such as a floor or the like; a bottom abutment B welded or otherwise secured to the base plate A; an upper abutment C of transversely angular formation providing a top horizontal leaf 1 and a depending vert-ical leaf 2, said top leaf 1 being rigid with a frame E either because of a fastening D or because said top leaf ,is a part of the frame itself. The depending vertical leaf 2 is intended to cooperate with a shock absorbing element F disposed against one face of the bottom abutment B to resist thrust transmitted to the base plate A. .The upper leaf 1 of the top abutment, in all cases, cooperates with a primary isolation unit G which in turn cooperates with the bottom abutment on the base plate A.

In Figures 1, 2, 3, 7, '8 and 9, the bottom abutment B is in the form of a section of an inverted channel.

In Figures 4 and 5, the bottom abutment B is in the form of a rectangular frame having the primary isolation unit G vulcanized thereto; and in Figure 6, the bottom abutment B is in the form of an angle member, one leg of which is welded to the base plate A.

In Figure '10, the bottom abutment is in the form of a single upstanding plate as will appear more in detail in connection with the description of that figure.

In Figures 1, 2 and 3, the bottom abutment B, which, as previously indicated, consists of a section of an inverted channel, has its top wall 3 provided with an opening for receiving the shank of the fastening D which is welded or otherwise affixed to a part of the frame E. A nut D is utilized for rigidly clamping the upper leaf 1 of the top abutment member to the frame member. The nut D on the bottom of the fastening holds the assembly to the bottom abutment B. Also, as shown in this group of figures, the base plate A is provided with an opening a arranged coaxially with the axis of the bolt D so as to provide access to the nut D before the assembly is secured to the foundation. It might also be added that this same feature prevails in Figures 7, 8 and 9.

The upper or top abutment C in the form described, namely, a horizontal leaf 1 and an angular leaf 2, constitutes a single chock, but as shown in Figure 3, a second depending or vertical leaf 2 may be provided in addition to the aforesaid depending leaf 2, thereby to provide a socalled double chock to resist two-way thrust.

In Figures 4 and 5, the fastening D, in order to secure the primary isolation member G in place, is provided with a tubular sleeve D whose lower end engages the upper end of the inner thirnble of the unit G, and whose upper end abuts against the under face of the top or horizontal leaf 1.

According to Figure 6 wherein the bottom abutment B consists of an angle instead of an inverted channel, the vertical leaf 2 which is welded to the base plate, enables the horizontal leaf to support the primary isolation unit G. In this construction, the fastening D carried by part of the frame E passes through the opening in the upper leaf 1 of the top abutment and is provided with a nut D which clamps the upper leaf 1 of the top abutment to the frame E.

In the modification shown in Figure 7, the bottom abutment B is in the form of an inverted channel Welded to the base plate A and the horizontal leaf of the top abutment designated as 1 is the web of a channel which also constitutes the frame E. The vertical leaf 2 of the top abutment C is formed by welding the upper edge thereof to the inner face of the web of the channel 1*. In this arrangement, the fastening D is welded to the bottom of the channel which constitutes the horizontal leaf of the top abutment and extends through the isolation unit G and into the bottom abutment B where it receives a nut D for holding the top abutment to the bottom abutment.

In Figure 8, the base plate A and bottom abutment B are of the same type as shown in Figures 1 to 3, inclusive, and the top abutment C consists of the horizontal web 1 of the channel E and the vertical leaf C consists of the depending flange E of the channel together with a vertical strip 2 which abuts against the vibration absorbing member E. Thus, in this arrangement, the top abutment consists of the horizontal leaf 1 which is also the frame part, while the vertical leaf consists of the composite elements E and 2.

In Figure 9, the base plate A and the bottom abutment B support the primary isolator G and one face of the abutment contacts the vibration absorbing element E. The top abutment C consists of the horizontal leaf 1 and the vertical leaf 2 which are formed as elements of an angle member which also constitutes the elongated frame. The fastening D is secured to the underside of the horizontal leaf 1 and is provided with a nut D for anchoring the top abutment to the bottom abutment with the primary isolation member G therebetween.

In the modification shown in Figure 10, the base plate A is provided with a single upstanding vertically disposed bottom abutment B. The top abutment C consists of the top leaf 1 and the depending vertical leaf 2 and the included angle of these members embraces the primary isolation unit G A fastening D secured to the frame E passes through an opening in the horizontal leaf 1 and extends into an opening in the primary isolation unit G where it receives a nut D which clamps the horizontal leaf 1 to the frame E The fastening D also extends downwardly to receive the nut D which exerts force against the upper end of a thirnble welded to the base plate A, thereby to clamp the primary isolation unit G in position. In this form the primary isolation member also acts as a horizontal thrust absorbing member for the depending leaf 2 in cooperation with the vertical abutment B.

From the foregoing, it will be understood that the present invention provides a base plate and a frame element having chock means therebetween, the said chock means comprising a bottom abutment and an angular upper or top abutment which may be either in the form of a separate angle, or even an inverted channel, or in some cases, the upper abutment may have its horizontal leaf formed by the web or equivalent portion of the frame.

I claim:

A vibration isolation support comprising a horizontal base member, a rigid support secured to and projecting upwardly from the base member, said support having a vertical side and a horizontal top, a resilient circular cushion overlying and resting on said horizontal top, said cushion extending outwardly beyond the edge of said top and vertical side and having also an upwardly projecting rim and a depressed central portion, a metallic ring encircling said cushion, an inverted L-shaped member having its horizontal side overlying and resting on the upwardly projecting rim of the cushion and having its vertical side extending downwardly parallel to the vertical side of said support and in spaced relation to the periphery of the cushion, a second resilient cushion disposed between and in contact with said vertical sides, a bolt projecting upwardly through said horizontal top, circular cushion, and horizontal side, for attachment to a member to be supported, a nut in said depressed portion threadedly engaged with the said bolt and a nut threadedly engaged with the bottom of the bolt below the horizontal top.

References Cited in the file of this patent UNITED STATES PATENTS 1,826,126 Delahanty Oct. 6, 1931 1,998,206 Rosenzweig Apr. 16, 1935 2,129,124 Geyer Sept. 6, 1938 2,189,708 Coyne Feb. 6, 1940 2,196,428 Saurer W Apr. 9, 1940 2,399,414 Wells et al. 1 Apr. 30, 1946 2,406,601 Fyler Aug. 27, 1946 2,464,613 Rosenzweig Mar. 15, 1949 FOREIGN PATENTS 157,810 Germany July 15, 1939 508,359 Great Britain June 29, 1939