US2202413A - Adjustable mounting for electric motors - Google Patents

Description

May 28, 1940 c. G. H. ANDERSON ET AL 2,202,413

` ADJUSTABLE MOUNTING' FOB` ELECTRIC MOTORS Filed Feb.' 4, 1938 IIIII I IIIII. Il

3l rlIII Il I. I I l l I I I I I I I L 'Patented' May 248, 19.40 s

Mmmm

0F FICE Carl vG. Anderson and kI-v'uar'I-KsFog, Toronto,

Ontario, Canada',` assgnors toi SangamoCompany Limited, Toronto', Qntario, Canada, Y

'Application 'The principal objects of this invention, are

to overcome the diiculties met with in providend elevational view showing a'motor and mounting exemplifying the present invention.

vFigure 2 is a side elevational view of the motor and mounting shown in Figure 1.

Figure 3 is a plan view.

Figure 4 is aplan viewillustrating a slightly l modified construction.

Figure 5 is an enlarged partial end elevation of the modified structure shown in Figure 4.

ther modification of mounting.

In the use of small electric" motors for vdriving devices such as washing machines or refrig- 30 erator mechanisms it is customary to operate the driven mechanism from the motor through the medium of a belt, andrbelt drives aresubject to great variation whichl results in loss of efficiency, and in making adjustments much dif- 35. proper tension and in maintaining the alignment of the driving and driven members.

Further, adjustments may be made under temperature and humidity conditions which may al-' most immediately becomey inoperative by reason of uncontrollable changes in surrounding atmospheric conditions. .n

The present invention contemplatesan extremely simple device which, `as illustrated in Figures 1, 2, and 3, comprises a pair of at iiexible plates I of metal orv other suitable material having their ends 2 secured to the shell 3 of the motor by being welded or riveted or held by screws 4. These plates extend under the motor shell in the direction of the belt drive 5 to the driven member (not shown), and their other ends are fixed to the base I5 by suitabley bolts or other means l. Y

A plate 8, also of flexible material may be 5; placed between the plates I having one end 9 se- In the accompanying drawing Figure 1 is'an f Figure 6 is an end elevation showing a furculty is experienced both in obtainingy the.

February "4, 193s, serial No. "188,594v 4c1aims. (ci. ziel-23) u `.cured tothe motor-.sh'ell'at thev side opposite to 4the points'of securing the plates I.

y This plate extends lunder the motor in a direction `opposite to the drive belt, and its end I0 isv secured to the .base bybolts I Ik,

. Themotoriwhen thus secured may roll on its iiexible supportsv but-its shifting axis will al- Suitable arms I2 are provided on Ythe end housings to extend in a direction away from the drive belt 5, and coiled tension springs I3 are connected to theends of said arms and to the base, thus applying afforce tending to roll the motor away from the driveY belt and auto'- matically maintain a tension on the belt equal to the tension yof the springs so that the belt will be maintained in its most effective operative condition whether it shrinks or expands and wear will be automatically compensated for.

It may be found desirable to dispense with the centre plate 8 andconnect the two plates at opposite ends" to the vmotor housing as illustrated by the dotted lines in Figure 4.

In Figure 5 `the holding plates as shown in Figure 4, are arranged at either side of a pad I4 which may be'of sound deadening material, such as rubber compressed between the base and motor and a sound deadening strip I5 may be arranged between .the motor shell and holding l plates.I

The spring tension device as shown is very simple and inexpensive. A more simplied but eicient structure'is illustrated in Figure 6 in which the motor is mounted on asingle curved spring plate I6, one end of which is curved upwardly and is secured to the motor. shell on the sideaway from the drive belt, the other end being fastened rigidly to the base. y

` In this form of application 1of the invention the motor is located in a position where it has to be rolled toward the driven member in order to place the belt in position, and the applied, .tension on the curved spring platewill exert a downward pressure substantially at right angles is that the curved end of the spring plate I6 is always exerting a constant self-compensating pull on thev belt and the downward component of forces holds the motor rmly'against the base block andv prevents vibration.

The exemplary forms of supports described will provide in effect a floating mounting insofar as displacement of the motor bodily inthe plane of disposition of the belt drive is concerned. Full ways move to parallel positions and the motor v cannot shift sideways.- .f

to the line of p ull of the drive belt. The result advantage may therefore be taken of the reactance torque thrust of the motor to roll the motor bodily in a belt-tightening direction and since this torque is greatest at the moment of starting when the load is greatest, an eicient belt drive will be achieved.

It will be readily appreciated that .other forms of application of this invention may be devised without departing from the principal feature as herein set forth.

What we claim as our invention is:

1. In a motor mounting, a motor, a base, means for mounting said motor for substantial rolling action relative to said base, including spacedapart spring strips forming a resilient anchorage between the base and motor, and a third spring strip disposed intermediately between the aforesaid spring strips in resilient opposition thereto and co-operating with the motor and with said pair of spring plates and resiliently supporting a tremity of the motor spaced only slightly above the base, said cradle support including separate curved spring plates secured at opposite ends in oppositionally disposed relation to opposite sides of the motor and to said base.

3. In a motor mounting, a motor, a base, means for resiliently supporting said motor for substantial rolling 'action relative to said base including spaced-apart spring strips secured to the side of the motor below the level of the axis and extending tangentially under the motor and rigidly secured to the base at the opposite side of securement to the motor and forming a resilient support and anchorage between the base and motor, and resilient means interposed under tension between said spaced-apart spring strips and between the lower periphery of the motor and the base and resiliently relieving said spring p strips of the full weight of the motor.

cushioninglroller support for said motor and relieving said resilient mounting means of the full Weight of the motor,`

CARL G. H. ANDERSON. IVAR K. FOG.

Images