Anti-noise mounting means for transmissions

Details

Inventors: Master, Ralph E.; Ritter, Jr., Arthur J.; Perry, David L.;
Assignee: Caterpillar Tractor Co. (Peoria, IL)
Primary Examiner: Peters, Jr.; Joseph F.
Assistant Examiner: Silverstrim; John P.
Attorney, Agent or Firm: Phillips, Moore, Weissenberger Lempio & Majestic

A mobile construction vehicle comprises a frame having a transmission assembly mounted on a rearward end thereof in cantilevered relationship. The transmission assembly comprises a bell housing solely mounted on an annular support of the transmission by first anti-vibration and noise suppressing means which isolates the housing from metallic contact with the support member. If so desired, second anti-vibration and noise suppressing means may be utilized to solely mount the support member on the frame to also prevent metallic contact therebetween.

DETAILED DESCRIPTION FIG.
1 discloses a track-type vehicle 10 of the type disclosed in U.
S.
Pat.
No.
3,828,873, assigned to the assignee of this invention.
The vehicle essentially comprises an endless track assembly 11 suitably mounted on each side thereof and adapted to be driven by a sprocket 12.
The sprocket, in turn, is selectively driven through a standard transmission assembly 13 mounted on a rearward end of a frame 14 of the vehicle.
Referring to FIGS.
2-6, the transmission assembly is surrounded by a metallic bell housing 15 attached in cantilevered relationship on support means of the transmission, comprising metallic support members 16, 17 and 18.
The bell housing is attached in isolated relationship on support member 16 by first anti-vibration and noise suppressing means 19 of the mounting means comprising elastomeric pad means including an annular and irregular (FIG.
3) non-metallic sealing gasket 20 compressed between an annular flange 21 of the bell housing and member 16.
A plurality of circumferentially disposed bolts 22 each extend through a bore 23 formed through flange 21 and is threadably secured to member 16.
A metallic bushing 24 is disposed on the shank of the bolt and functions as a spacer and stop means, as will be hereinafter more fully described.
An annular non-metallic bushing 25 is mounted on bushing 24 along with a non-metallic washer 26.
Washer 26 is disposed between an outboard side of flange 21 and a metallic washer 27, the latter washer being disposed between an outboard end of bushing 24 and the head of bolt 22.
It can be seen that upon the tightening of bolt 22 that metallic bushing 24, disposed axially between member 16 and washer 27, will function as a stop means to compress gasket 20, bushing 25 and washer 26 a predetermined maximum amount.
The latter non-metallic gasket, bushing and washer may comprise a suitably composed material which will provide the anti-noise and vibration absorbing desiderata hereindescribed.
For example, such material may comprise suitably woven cotton fabric impregnated with an elastomer such as neoprene or chloroprene rubber

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