US2102441A - Drive mechanism - Google Patents

Description

Dec. 14, 1937. w, w, L ANE 2,102,441

DRIVE MECHANIS'M Original Filed July 5, 1935 2 Sheets-Sheet l 5 P WW2;

W. W. SLOANE DRIVE MECHANISM Dec.- 14, 1937.

Original Filed July 5, 1955 2 Sheets-Sheet 2 0 v i. .2 v E bl...- in nnunnvi 1| Patented Dec. 14, 1937 I 2,102,441.

UNITED STATES PATENT OFFICE nmvn MECHANISM William W. Sloane, Chicago, Ill., assignor to Goodman Manufacturing Company, Chicago, 111., a corporation of Illinois Application July 5, 1935, Serial No. 29,791 RenewedAugust 14, 1936 20 Claims. (Cl. 18877) This invention relates to improvements in drive The drive from the motor to the feed drums mechanisms particularly adapted for use in includes an armature pinion l meshing with mining machines and more particularly to a and driving a spur gear IS on a longitudinal safety device for automatically releasing a varishaft I1. Said longitudinal shaft besides formable feed mechanism. upon a predetermined torque ing a means for driving the feed mechanism also 5 load thereon. 1 forms a means for driving the cutter chain about Among the objects of my invention are to prothe cutter bar in a manner which will not herein vide a new and improved feed mechanism in-' be described since it is no portion of my presentcluding a planetary geared variable feed drum so invention. A worm I8 is keyed on said longi-- 10;: arranged that said drum may be released upon tudinal shaft and meshes with and drives a worm a predetermined torque load thereon and may gear l9 on a sleeve 25 journaled in the frameresume its driving operation'when the overload I2 in a usual manner. The ends of said sleeve conditions subside. Another object of my in- V extend within a pair of parallel spaced variable venticn is to provide such a device which is op-- feed drums 2|, 2| which are herein shown as erative when the variable feed drum is rotating being planetary geared reduction devices. The 15 in either direction. Other objects of my inven-' ends of said sleeves have pinions 22, 22 formed tion will appear from time to time as the followintegral therewith Wh ch serv as Su ears for ing specification proceeds. said planetary geared reduction mechanisms.

My invention may best be understood by refe p a et 2| y be 0f y y Well 2:) erence to the accomp y g drawings wherein; known to those skilled in the art, but as herein 20,

Figure 1 is a top plan view of a mining mashown are of the plural speed frictionally conchine illustrating one form in which my inventrolled type so arranged that a pair of coaxial tion may be embodied, with the gear cover reshafts 23, 23 may be driven independently of moved and certain parts broken away and shown each other at either a high or a low frictionally in horizontal section; controlled speed for independently driving the 25- Figure 2 is a longitudinal vertical sectional view feed drums l3, l3 in the usual manner. taken through the feeding mechanism of the Each of said planetaries as shown in Figure 1, mining machine; includes an internal gear 24 meshed with plan- Figure 3 is a vertical sectional view-taken subetary pinions 25, 25 which are driven from the ficistantially along line 3-3 of Figure 1; and sun gear 22. Said pinions are journaled on Figure 4 is a sectional view somewhat similar shafts 2B, 26 which are mounted within a cage to Figure 3, but with the release mechanism 21. Planetary pinions 28, 28 are formed integral shown in a different position than in Figure 3. with the planetary pinions 25, 25 to one side In the embodiment of my invention illustrated thereof, and mesh with an internal gear 29.

in the drawings, my improved form of feed mech- Said internal gear is provided with a hub 30 35.

anism is shown as being incorporated in a, min-" keyed to the shaft 23 for driving said shaft.

ing machine of the room and pillar type. Said The'internal gear 24 is so arranged that its, mining machine is of a construction similar to outer periphery forms a drum 32 adapted to be that illustrated in a prior Patent No. 2,075,870 engaged by a friction member, generally indiwhich issued April 6, 1937, so will only herein be cated by reference character 3|, to hold said 40 described insofar as is necessary to make my internal gear from rotation. Aflange 33 extends present invention readilyunderstandable. outwardly from the cage 21 over the outer The main elements of the mining machine ilperiphery of the internal gear 29, and the outer lustrated include a motor HI and a chain carryperiphery of said flange forms another drum ing cutter bar l l projecting forwardly thereadapted to be engaged by a friction member, gen- 45.

from, a frame i2 disposed rearwardly of said erally indicated by reference character 31a, for motor and a pair of independently operable holding said cage from rotation.

feed drums I3, !3 disposed on each side of said When the cage 21 is held from rotation and frame. Said feed drums are each adapted tothe internal gear 24 is free to rotate, the internal 59 have a feeding cable M wound thereon and be gear 29 is driven through the sun pinion 22 and 5 trained therefrom to fixed abutments remote planetary pinions 25 and 28 for drivingthe shaft from the machine for sumping said cutter bar 23 at a relatively high frictionally controlled into the coal and moving the machine across the speed. 7 .7 coal face in a manner well known to those skilled When the internal gear 24 is held from rotation,

in the art. the planetary pinions 25, 25 orbitally move within 55 said gear and rotate said cage. The shaft 23 is in turn driven at a low frictionally controlled speed by the planetary pinions 28, 28 and internal gear 29.

The device of my invention is herein shown as being applied tothe friction band 3| and the low speed drive connection only, although it may be applied to both high and low speed drive connections, and since the construction and operation of said low speed friction members on each of said drums is similar, one only will herein be described and shown in detail.

The friction member 3|, as herein shown in Figures 3 and 4, includes a friction band 34 encircling a greater portion of the drum 32 forming the outer periphery of the internal gear 24, and another friction band 35 encircling a minor portion of said drum. One end of the friction band 34 is pivotally connected to the lower end of a lever arm 36 of an operating lever 31. The other end of said friction band has a drilled lug 39 extending outwardly therefro-rn whic-h abuts a rocking member 40. I

The rocking member 40 is pivoted in the frame 12 on a shaft 4| herein preferably shown as being disposed parallel to the shaft' 23 and spaced rearwardly and downwardly from the drum 32 in such a manner that said rocking member extends:

radially with respect to the axis of rotation of said drum under ordinary operating conditions when there is no slippage between said drum and friction bands, as is illustrated in Figure 3. Said rocking member is drilled in alignment with the drilled portion of the lug 39 to receive a suitable 35 bolt 43 extending through said lug and rocking member. The drilled portion of said rocking member tapers outwardly from the center thereof in opposite directions to permit rocking movement of said'rocking member with respect to said drum. The bolt 43 also extends through a lug 44 abut ing the opposite face of said rocking memher and extending from one end of the friction band 35. A compression spring 45 encircles said bolt and abuts the outer face of said last-mentioned lug and is held on said bolt by means of a washer andlock nuts, indicated by reference character 46. Said compression spring is adapted to yield upon a predetermined load thereon to permit said rocking member to separate the ends of said bands and disengage them from the drum 32 upon movement of said bands with said drum, as is clearly illustrated in Figure 4.

The end of the friction band 35 opposite the lug 44 is pivotally connected to the operating lever 31 at a point spaced from the point of pivotal connection of the friction band 34 thereto, so that pivotal movement of said operating lever'about its axis of pivotal connection to the friction band 34 in one direction will tighten said friction bands on said drum, and permit said friction bands to be disengaged from said drums when moved in an opposite direction.

The operating lever 31 is operated by means of a hand wheel on the outer end of a threaded shaft 48 journaled within the main frame l2 and threaded Within a threaded member' 49. Said shaft and threaded member extend angularly upwardly towards a cover 59 for said main frame, and the forward end of said threaded member is slidably mounted within a bracket 5| depending from saidcover. A lug 53 extends outwardly from 7 one side of said threaded member and engages an arcuate engaging surface of the operating lever 31. Said arcuate surface extends along the band 34 at a suitable distance therefrom and generally conforms to an arc whose center is the center of rotation of the drum 32 when the friction bands 34 and 35 are tight on said drum. This permits automatic disengagement of said bands from said drum when said sleeve is in a stationary position and prevents said operating lever from tightening said bands on said drum when said bands have the tendency to rotate with said drums in a manner which will more clearly appear as this specification proceeds. 7

It should herein be noted that the friction member 3Ia is operated from the threaded member 49, by a lug 54 extending outwardly therefrom-in an opposite direction from the lug 53, and that said lug is so positioned that said friction member will be released when the friction member. 3| is applied and vice versa to prevent the internal gear 24 and cage 21 from being held from rotation at the same time.

The means for controlling release of the friction bands 34 and 35 from the drum 32, besides including the rocking member 40 and spring 45, includes a pair of opposed spring pressed members or plungers 55 and 5B abutting opposite faces of a lug 51 extending outwardly from the friction band 34 in a horizontal plane, as shown in Figure 3. The spring pressed plunger 55 includes a bolt 52 depending from a support bracket 53.

A compressionspring 59 encircles said bolt and is interposed between its head and the under surface of said support bracket for yieldably engaging said head with the upper face of said lug. In a like manner, the opposing spring-pressed plunger 56 includes a bolt- 60 extending upwardly froma support bracket Bl A compression spring 62 encircles said bolt and is interposed between its head and the upper surface of said support bracket for yieldablv engaging said head with the under surface of said lug. Tension of said springs may be adjusted by suitable lock nuts 63, 63 threaded on the ends of said bolts.

Since opposite faces of the lug 51 are engaged by opposed spring-pressed plungers in parallel planes, said plungers serve to hold the friction band 34 in position on the drum under normal conditions. When the torque load of the drum 32 increases a certain predetermined amount, determined by the tension of the springs in said spring-pressed plunger, said drum will rotate the friction bands 34 and 35 against one of said plungers depending upon the direction of rotation of the feed drum. When this predetermined load limit is reached and the drum 32 tends to rotate in a clockwise direction, as shown in Figure 4, the spring 59 will be compressed which will permit movement of the lug 51 in the direction which said drum tends to rotate. This will pivot the rocking member 40 and compress the spring 45 and spread apart the ends of .the friction bands 34 and 35 for disengaging said bands from the outer periphery of the internal gear 24, as is clearly illustrated in Figure 4.

When the torque load on said drum decreases, the spring 59 will again move the lug 51 to a normal position and permit the brake bands 34 and 35 to be in an engaged position on said drum, the spring 45 closing the ends of said brake bands and the rocking member 40 returning to a normal position.

It should be noted herein thatinasmuch as the outer face of the operating lever 31'is formed on an arc coaxial with the center of the shaft 26, that when the bands 34 and 35 are released, said lever will slide along the lug 53 and permit Sa d friction bands to be released from the outer periphery of said internal gear. 1

It should also be apparent that inasmuch as the construction of each spring-pressed plunger engaging the lug 51 is the same, and inasmuch as form in which my invention may be embodied,

it will be understood that the construction and arrangement of the various parts may be changed or altered without departing from the spirit or scope thereof. Furthermore, I do not Wish to be construed as limiting myself to the precise construction illustrated, excepting as it may be limited in the appended claims.

I claim as my invention:

1. In a power transmission device, a driven member, geared drive means for driving said member including a rotatable member, and means under the control of friction for automatically releasing said drive means upon a predetermined torque load on said driven member including a friction member engageable with said rotatable member, manually operable means for engaging said friction member with said rotatable member, a rocking member engageable with said friction member and having connection with said means for manually engaging said friction member with said rotatable member, and a yieldable member engaging said friction member and adapted to yield upon a predetermined torque load on said shaft and drum to permit said friction member to rock said rocking member and release said manual engaging means.

2. In a power transmission device, a driven member, a geared drive means for driving said member including a rotatable member, and means under the control of friction for automatically releasing said drive means upon a predete mined torque load on said shaft including a friction member engageable with said rotatable member, means for engaging said friction member with said rotatable member, a rocking member pivotally movable about a fixed axis and engageable with said friction member and having connection with said means for manually engaging said friction member with said rotatable member, and a pair of opposed yieldable members engaging said friction member, one of said members being adapted to yield upon'a predetermined torque load on said shaft and rotatable member depending upon the direction of rotation of said driven member to permit said friction member to rock said rocking member and release said manual engaging means.

3. In a power transmission device, a driven shaft, geared drive means for driving said shaft including a drum, and means under the control of friction for automatically releasing said drive means upon a predetermined torque load on said shaft including a friction member engageable with said drum, manually operable means for engaging said friction member with said drum including a lever arm having pivotal connection with an end of said friction member, a rocking member pivot-ally movable about a fixed axis and having connection with the end of said friction member which is opposite its point of connection to said lever arm, a connection from said rocking member to said lever arm, and a yieldable member engaging said friction member adapted to yield upon a predetermined torque load on said shaft and drum to permit movement of said friction member to rock said rocking member.

4. In a power transmission device, a driven member, geared drive means for driving said shaft including a rotatable member, and means under the control of friction for automaticallyv releasing said drive means upon a predetermined torque load on said shaft including a friction member engageable with said rotatable member, means for engaging said friction member with said rotatable member including a lever arm having pivotal connection with an end of said fric-- tion member, a rocking member pivotallymovable about a fixed axis and having connectionv bers engaging said friction member, one of said members being adapted to yield upon a predetermined torque load on said rotatable member and shaft depending upon the direction of rotation of said shaft to permit movement of said friction member to rock said rocking member and disengage said friction member from said rotatable member.

5. In a power transmission device, a driven member, geared drive means for driving said member including a rotatable member, and means under the control of friction for automatically releasing said drive means upon a predetermined torque load on said shaft including'a friction member engageable with said rotatable member, another friction member engageable with said rotatable member, manually operable means having connection with adjacent ends of said friction members for engaging said friction members with said rotatable member, a rocking member engageable with the ends of said friction members which are opposite their point of connection to said engaging means, and a yieldable member engaging said first-mentioned friction member and adapted to yield upon a predetermined torque load on said driven member to permit movement of said friction member, whereby said friction member may rock said rocking member and disengage said friction members from' said rotatable member.

6. In a power transmission device, a driven member, geared drive means for driving said member including a rotatable member, and means under the control of friction for automatically releasing said drive means upon a predeter-,

mined torque load on said shaft including a friction member engageable with said rotatable member, another friction member engageable with said rotatable member, manually operable means having connection with adjacent ends of each of said friction members for engaging said friction members with said rotatable member, a rocking member engageable with the ends of said friction members which are opposite their,

'7. In a planetary geared reduction device, a

driven member, a reaction member, means for holding said reaction member from rotation and automatically releasing said reaction member upon a predetermined torque load on said driven member comprising a friction member engageable with said reaction member, manually operable means for engaging said friction member with said reaction member, a rocking member engageable with said friction member and having operative connection with said means for manually engaging said friction member with said reaction member, and a yieldable member engaging said friction member and adapted to yield upon a predetermined torque load on said driven member to permit said friction member to move and rock said rocking member and release said manual engaging member.

8. In a planetary geared reduction device, a driven member, a reaction member, means for holding said reaction member from rotation and automatically releasing said reaction member upon a predetermined torque load on said driven member comprising a friction member engageable with said reaction member, manually operable means for engaging said friction member with said reaction member, a rocking member engageable with said friction member and having connection with said means for manually engaging said friction member with said rotatable member, and a pair of opposed yieldable members engaging said friction member and adapted to yield upon a predetermined torque load on said driven member depending upon the direction of rotation of said driven member to permit said friction member to rock said rocking member and release said manual engaging means.

9. In a planetary geared reduction device, a driven shaft, a drum, means for holding said drum from rotation and automatically releasing said drum upon a predetermined torque load on said shaft comprising a friction band engageable with said drum, another friction band engageable with said drum, means for engaging said friction bands with said drum including a lever having pivotal connection with an end'of said first band and an-end of said secondhand at a point spaced from the point of connection of said first.

band thereto, a rocking member pivotally movable about a fixed axis and engageable with the ends of said bands opposite their point of con nection to said lever, and a yieldable member engaging said first-mentioned friction band and adapted to yield upon a predetermined torque load on said shaft and drum.

10. In a planetary geared reduction device, a drivenrshaft, a drum, means for holding said drum from rotation and automatically releasing said drum upon a predetermined torque loadon said shaft comprising a friction band engageable with said drum, another friction band engageable with said drum, means for engaging said friction bands with said drum including a lever having pivotal connection with an end of said first band and an end of said second band at a point spaced from the point of connection of said first band thereto, a rocking member pivotally movable about a fixed axis and engageable with the ends of said bands opposite their point of connection to said lever, and a pair of opposed yieldable members engaging said first-mentioned band, one of said members being adapted to yield upon a predetermined torque on said drum depending upon the direction of rotation of said shaft.

11. In a planetary geared reduction device, a driven shaft, a drum, means for holding said drum from rotation and automatically releasing point of connection to said lever, yieldable means engaging said ends of said bands with said rocking member, and a yieldable member engaging said first-mentioned friction band and adapted to yield upon a predetermined torque load on said shaft and drum.

12. In a planetary geared reduction device, a

driven shaft, a drum, means for holding said drum from rotation and automatically releasing said drum upon a predetermined torque load on said shaft comprising a friction band engageable with said drum, another friction band engageable with said drum, means for engaging said friction bands with said drum including a lever having pivotal connection with an end or said second band. at a point spaced from the point of connection of said first band thereto, a rocking'member pivotally movable about a fixed axis and engageable with the ends of said bands opposite their point. of connection to said lever, yieldable means engaging said ends of said bands with said rocking member, and a pair of opposed yieldable members engaging said firstmentioned band, one of said members being adapted to yield upon a predetermined torque load on said shaft and drum depending upon the direction of rotation of said shaft.

13. In a variable speed geared reduction device, a drum, means for holding said drum from rotation whereby said geared reduction device may act as a positive driving means comprising a friction band engageable with said drum, another friction band engageable with said drum, manually operable means for engaging said friction bands with said drum or releasing them therefrom, and means for automatically releasing said friction bands from said drum upon a predetermined torque load thereon comprising a rocking member engaging said friction bands, yieldable means for engaging said bands with said rocking member, and a yieldable,member engaging one of said friction bands and adapted to yield upon a predetermined torque load on said drum to permit rotational movement of said band and drum and cause pivotal movement of said rocking member to disengage said bands from said drum.

l4. Ina variable speed geared reduction device, a drum, means for holding said drum from rotation whereby said geared reduction device may act as a positive driving means comprising a friction band engageable with said drum, another friction band engageable with said drum, manually operable means operatively connected with an end of each of said friction bands for engaging said bands with said friction drum or releasing them therefrom, and means for automatically releasing said friction bands from said drum upon a predetermined torque load thereon comprising a rocking member engaging the ends of said friction bands oppositetheir point of connection with said manual engaging means, yield- T able means for engaging said rocking member with said friction bands, and a yieldable-mem- 'ber engaging one of said friction bands in a plane ffirst band, said means and said arm being so perpendicular to a radial line extending through the center of said drum, said yieldable member being adapted to yield upon a predetermined load on said drum to permit movement of said band and drum and effect pivotal movement of said rocking member to separate the ends. of said bands and release said bands from said drum;

15. In a variable speed geared reduction device, a drum, means for holding said drum from rotation whereby said geared reduction device may act as a positive driving means comprising a friction band engageable with said drum, another friction band engageable with said drum, manually operable means for engaging said friction bands with said drum or releasing them therefrom, and means for automatically releasing said friction bands from said drum upon a predetermined torque load thereon when the variable speed device is rotating in either direction comprising a rocking member engaged by said friction bands, yieldable means for engaging said bands with said rocking member, and a pair of opposed yieldable members engaging one of said friction bands, one of said yieldable members being adapted to yield upon a predetermined load on said drum to permit movement of said band and drum and effect pivotal movement of said rocking member to separate the ends of said bands and release said bands from said drum.

16. In a variable speed geared reduction device, a drum, means for holding said drum from rotation whereby said geared reduction device may act as a positive driving means comprising a friction band engageable with said drum, another friction band engageable with said drum, manually operable means operatively connected with an end of each of said friction bands for engaging said bands with said drum or releasing them therefrom, and means for automatically releasing said friction bands from said drum upon a predetermined torque load thereon when the variable speed device is rotating in either direction comprising a rocking member engaging the ends of said friction bands opposite their point of connection with said manual engaging means, yieldable means for engaging said rocking member with said friction bands, and a pair of opposed yieldable members engaging one of said friction bands in a plane normal to the inner periphery thereof, one of said yieldable members being adapted to yield upon a predetermined load on said drum to permit movement of said band and drum and effect pivotal movement of said rocking member to separate the ends of said bands, and release said bands from said drum.

1'7. In a planetary geared reduction device, a driven shaft, a drum, means for holding said drum from rotation and automatically releasing said drum upon a predetermined torque load on said shaft comprising a friction band engageable with said drum, another friction band engageable with said drum, means for engaging said friction bands with said drum including an operating lever having one lever arm pivotally connected at one of its ends with an end of said first-mentioned band and with an end of said second band at a point spaced from the point of connection of said first band thereto, and another arm extending along said first-mentioned band in the same general direction as said band but spaced therefrom and having an arcuate engaging surface, means for engaging said arcuate engaging surface for pivoting said lever arm about its axis of pivotal connection to said arranged as to prevent said .means from pivotally moving said lever arm upon movement of said friction bands with said drum, a rocking member engageable with the ends of said bands opposite their point of connection to said operating lever, and a yieldable member engagingsaid first-mentioned friction band, said member being adapted to yield upon a predetermined torque load on said drum to permit limited rotation-of driven shaft, a drum, means for. holding said drum from rotation and automatically releasing said drum upon a predetermined torque load on said shaft comprising a friction band engageable with said drum, another friction band engageable with' said drum, means for engaging said friction bands with said drum including an operating lever having one lever arm pivotally connected at one of its ends with an end of said first-mentioned band and with an end of said second band at a point spaced from the point of connection of said first band thereto, and another arm extending along said first-mentioned band in the same general direction as said band but spaced therefrom and having an arcuate engaging surface, means for engaging said arcuate engaging surface for pivoting said lever arm about its axis of pivotal connection to said first band, said means and said arm being so arranged as to prevent said means from pivotally moving said lever arm upon movement of said friction bands with said drum, a rocking member engageable with the ends of said bands opposite their point of connection to said operating lever, and a pair of opposed yieldable members engaging said first-mentioned friction band, one of said members being adapted to yield upon a predetermined' torque load on said drum to permit limited rotation of said drum and band whereby said rocking member may separate the ends of said band with which it is engaged.

19. In a planetary geared reduction device, a driven shaft,'a drum, means for holding said drum from rotation and automatically releasing said drum upon a predetermined torque load on said shaft comprising a friction band engageable with said drum, another friction band engageable with said drum, means for engaging said friction bands with said drum including an operating lever having one lever arm pivotally connected at one of its ends with an end of said first-mentioned band and. with an end of said second band at a point spaced from the point of connection of said first band thereto, and means for automatically releasing said friction bands from said drum upon a predetermined torque load on said drum comprising a compression member engaging said first-mentioned friction band, said member being adapted to yield upon a predetermined load thereon, and a rocking member engaging the ends of said friction bands opposite their point of connection to said operating lever, compression means being provided for engaging said bands with said rocking member, said compression means being adapted to yield upon a predetermined load on said rocking member whereby said rocking member may rock and separate the ends of said bands upon yieldable movement of said first-mentioned compression member.

20. In a planetary geared reduction device, a driven shaft, a drum, means for holding said 'drum'from rotation and automatically releasing said drum upon a predetermined torque'load on 'said shaft comprising a friction band engageable with said drum, another friction band engageable with said drum, means for engaging said friction bands with said drum including an operating lever having one lever arm pivotally connected at one of its ends with an end of said firstmentioned band and with an end of said second '10 band at a point spaced from the point of connection of said first band thereto, and means for automatically releasing said friction bands from said drum upon a predetermined torque load on said'drum comprising a pair of opposed '15 compression members engaging said first-mena predetermined load on said rocking member whereby said rocking membermay rock and separate the ends of said bands upon yieldable movement of one of said first-mentioned compression members.

WILLIAM W. SLOANE,

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