US2244539A - Nutating disk motor - Google Patents

Description

June 3, 1941.

E. M. KRUEGER NUTATING DISK MOTOR Filed July 10. 1939 INVENTOR. I EM M. Kfu fg ATTORNEYJ Patented June 3, 1941 NUTATIN G DISK MOTOR Emil M. Krueger, Milwaukee, Wis., assignor to Badger Meter Manufacturing Company, Milwaukee, Wis, a corporation of Wisconsin Application July 10, 1939, Serial No. 283,541

11 Claims.

This invention relates to improvements in nutating disk motors.

It is the primary object of the invention to reduce noise and wear in a nutating disk motor such as is commonly used to drive the register of a water meter.

The invention further includes for its objectives the provision of bearing surfaces for the disk thrust roller which are continuous across the two parts of the disk chamber, and are preferably made-oi some moderately yieldable material such as rubber.

It is my further purpose to provide a bearing insert providing the continuous bearing surfaces aforesaid, which insert is so interlocked with the component parts of the chamber as to make it unnecessary to use any securing means or to involve any additional expense in the assembly of the device.

In the drawing:

Figure 1 is a view in transverse section through.

the chamber of a motor of the nutating disk type embodying this invention, parts of the disk and its bearing ball being shown in section.

Figure 2 is a view showing, in relatively separated positions, the component parts of the chamber and the bearing insert which I incorporate in accordance with this invention.

Figure 3 is a fragmentary inside elevational view of a portion of the chamber and the bear-, ing insert, the nutating disk being fragmentarily illustrated in section.

Figure 4 is a fragmentary detail view similar to Figure 2, illustrating a modified embodiment of the invention.

Figure 5 is a fragmentary detail view taken in section on line 5--5 of Figure 4.

Figures 6 and 7 are fragmentary detail views similar to Figures 4 and 5 respectively, and illustrating further modified embodiments of the invention.

Like parts are identified by the same reference characters throughout the several views.

The nutating disk 6 is conventional. It is mounted on the usual central ball 1 with an orbitally movable shaft 8 which delivers from the motor the motion developed by the disk. A pin 8 inserted radially into theperiphery of the disk carries the thrust roller [0.

The casing is made, as usual, in two component parts I! and I8, which are of generally cupshaped form and provided with sockets at I! and Il to receive the ball 1. In accordance with the usual practice, the peripheral margins of the casing parts l5 and ii are adapted for interlocking engagement to prevent leakage. A partition l9 carried by the chamber element l5 engages in a slot 20 in the chamber element l6 and is also engaged by the slotted portion of the nutating disk 6 in the usual way. At one side of the partition the chamber parts are notched at 2| and 22, respectively, the two notches being complementary to provide a port. At the other side of the partition each chamber element is provided with a port as shown at 23 and In the construction shown in Figures 1, 2 and '3, the-entire side wall of each of the chamber elements I5 and i6 is cut away opposite the partition is to provide in chamber element IS a slot at 26, and to provide an extension of that slot at 21 into chamber element i6. Adjacent slot 26, recesses 28 and 29 are cut into the wall surface of chamber element I5, as best shown in Figure 2.

The insert 30, which is separately illustrated in perspective in Figure 2, may be made of any material, as for example metal, plastics, fiber or rubber. It is made to fit into the registering notches 26 and 21 to completely close the side wall of the chamber. A bearing surface 3| at its top abuts the top wall of the chamber, and a similar bearing surface 32 at its bottom abuts the bottom wall of the chamber. Ears 33 and 34 projecting laterally from its sides are 'made to fit the recesses 28 and 29 to interlock the insert against displacement outwardly respecting the chamber. Thus, on the assembly of the chamber parts, the insert is securely locked against either inward, outward or lateral movement and becomes a unitary part of the assembly. In the inner face of the insert 30 is provided a channel 35 of the proper width to receive the thrust roller iii. In the past. the thrust roller ill in nutating disk motors has operated cludes any wear occasioned by the roller traversing a joint. Moreover, where the insert 30 is made of relatively yielding material, such as rubber or even hard rubber, it appears that other sources of wear, noise and inaccuracy are eliminated. It may possibly be that when the thrust is used at 30. Wear between the pin 9 and the mutating disk 6 is virtually eliminated by this arrangement.

In the embodiment of the invention shown in Figs. 4 and 5 I do not completely cut away the wall of the disk chamber but provide in the component parts thereof dove-tailed grooves at Si and 38 which register to receive the insert 40. This insert has a wedge-shaped cross section complementary to the grooves 31 and 38, and constitutes a tenon, whereby it is positively positioned with respect to each component part of the chamber. This insert is made of rubber or the like, in order that it may be sufiiciently flexible so that the relatively rigid chamber parts l5 and [6 may be assembled upon it. Its slot 35 is identical with that which has already been described, and it functions in the same manner.

In this instance, however, it is positioned wholly within the chamber, and the chamber wall is continuous and unbroken about the exterior of the insert. Y

The grooves 310 and 380 in the preferred construction shown in Figs 6 and 7 are not dovetailed but have parallel sides. The ends of the complementary insert 400 are beveled to a plane which is substantially at right angles to the plane in which the casing parts I! and it are attached. Consequently this insert, while firmly interlocked at its ends to be rigidly positioned in the chamber, need not be made of flexible material but may be made of harder rubber, or fiber, or plastic, or even of metal. In this construction also, the chamber wall is continuous and unbroken about the exterior of the insert and the slot at 35 is continuous across the joint between the component parts of the chamber and the insert is positively located in the chamber.

' This application is a continuation in part of my application Serial No. 243,210, filed Novem ber 30, 1938.

I claim:

1. In a device of the character described, the combination with a chamber having upper and lower parts with registering side walls having registering portions relieved to receive an insert, an insert having interlocking connection with the respective side wall portions of said parts, whereby to span said parts and be secured against displacement with respect thereto when said parts and insert are assembled, a nutating disk provided with means mounting it operatively in said chamber, and a thrust roller mounted peripherally on said disk, said insert being provided with spaced surfaces with which said roller is engageable, said surfaces being continuous throughout the range of movement of the roller in the nutation of said disk.

2. A device of the character described, comprising the combination with a nutating disk provided peripherally with a thrust roller, of a chamber comprising separable upper and lower parts having means for the operative bearing of said disk, corresponding wall portions of said parts being relieved to receive an insert opposite the thrust roller of said disk, means for sealing contiguous peripheral margins of said chamber parts, and a slotted insert provided withspaced bearing surfaces for said thrust roller continuous throughout the range of movementthereof in the nutation of said disk, saidinsert comprising a non-metallic element receivable into the relieved portion of each of said parts in a direction peripherally from its peripheral margin aforesaid. said insert being interlocked with said parts against radial and transverse displacement.

3. In a device of the character described, the combination with a nutating disk provided peripherally with a thrust roller, of a chamber therefor having means for the operative mounting of said disk and comprising upper and lower parts having wall portions peripherally fitted to said disk and relieved to provide channels extending upwardly and downwardly in the respective parts opposite said thrust roller, and an insert having an interior surface conforming to the interior surface of said chamber, said insert being slidable upwardly into the channel of the upper part of said chamber, slidable downwardly into the channel of the lower part of said chamber, and provided with means interlocking it with both parts of said chamber against displacement respecting said channels, said insert being provided with means constituting spaced bearing surfaces for said thrust roller, continuous and unbroken throughout the range of movement of said roller across both of the parts of said chamher.

4. A device of the character described, com prising a chamber for a nutating disk having up per and lower parts, said parts having in their interior surfaces registering recesses, in combination with an arcuately formed insert internally registering with the walls of said parts and fitted into the respective recesses, said insert having a channel extending upwardly and downwardly to provide spaced bearing surfaces continuous across the respective parts of said chamber.

5. In a device of the character described, the combination with a flexible insert having an arcuate form vertically and a wedge-shaped form in cross section, said insert being provided with a slotted concave face, of a meter chamber comprising separable parts, each provided with a dove-tailed slot in which the respective ends of said insert are fitted.

6. In a device of the character described, the combination with upper and lower disk chamber parts provided in registering wall portions with registering mortises, said wall portions being continuous and unbroken about said mortise, of a flexible insert having an inner face coinciding with the inner faces of the respective parts, said insert being fitted to the respective mortise against transverse displacement, and being pro- 1 vided with a bearing slot in its inner face having combination of upper and lower chamber parts having corresponding recessed wall portions, and a rubber insert fitted to said recessed wall portions and provided with means securing it against displacement respecting the assembled parts, said mucosa iparts, said chamber parts bein: closed about the insert.

9. In a device of the character described, the combination of upper and lower chamber parts having top and bottom suriacesand corresponding recessed wall portions, the respective recemes extending into said wall surfaceaand an. insert fitted to said recessed. wall portions and interlocked at its ends with the extensions of said recesses into said wail surfaces. whereby said insert is fixed against disptacementrespecting said chamber arts. said insert having its inner we provided with a slot-and bearing surfaces bounding said slot which are continuous across the Joint between the respective chamber parts.

10. A fluid meter ccmprisins a meter chamber.

a disk in said chamber Journalied for mutating motion therein, a slot formed in the wall oi the meter chamber and extending only part way into said wall. a lining of wear resisting material protecting both sides of said slot, and a thrust roller journalled on said disk and extending into said slot.

11. A iiuid meter comprising a meter chamber, a disk in said chamber Journalied for nutating motion therein, a slot in the wail of the meter chamber providing a wail of reduced thickness and having its ends out beyond the chamber top tending into said slot. 7

, EMIL M. EUEGER.

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