US2405156A

US2405156A - Hoist

Info

Publication number: US2405156A
Application number: US555958A
Authority: US
Inventors: Sidney S Mcintyre
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-09-27
Filing date: 1944-09-27
Publication date: 1946-08-06
Anticipated expiration: 1963-08-06

Description

Aug. 6, 1946- s. s. MclNTYRE HOIST Filed Sept. 2'7, 1944 2 Sheets-Sheet 2 INVENTOR, aw/5y Wf]? mi Patented Aug. 6, 19 46 UNITE STATES TENT OFFIC 5 Claims.

This invention relates to cable windin hoists and the like, and it has reference more particularly to improvements in a cable winding drum and driving clutch combination that is especially adapted for use in hoists of those types used extensively in logging operations and comprising cable winding drums mounted for free turning on their supporting shafts and designed to be driven for the winding in of cables thereon, through the engagement of cooperatively arranged clutch elements fixed on end flanges of the drums and on driven gears that are mounted to revolve on the drum mounting shafts and to be shifted on their shafts, from and toward the drums, as is required to engageor disengage, by spring pressure, the complemental clutch elements.

It is the principal object of this invention to provide novel control means for the manual hifting and holding of the drum driving gear wheels for the quick and effective engagement or disengagement of complemental clutch elements; and through which pressure may be applied to hold the clutch elements functionally engaged but with a minimum of friction and wear on the parts of the control means. Furthermore, to provide a manual clutch means for applying the clutch that is carried on the drum mounting shaft itself, and not on independent frame members.

Another object of the invention is to provide novel means for maintaining the drum against movement along its shaft and its proper relationship to th clutch elements.

Another object of the invention is to provide a combination as above stated that is relatively simple and comparatively inexpensive, yet effective and efficient in its use.

It is also an object of the invention to provide an improved form of hoist frame structure wherein the frame of the power plant and the cable drum mounting shafts serve as parts of the frame structure, giving rigidity, strength and durability thereto without additional weight. 1

Other objects of the invention reside in the details of construction of the various parts embodied in the device; in their combination and relationship in the operative assembly and in the mode of use and operation of the device as will hereinafter be fully described.

In accomplishing the above mentioned and other objects of the invention, I have provided the improved details of construction, the preferred forms of which are illustrated in the accompanying drawings wherein Fig. 1 is a side view of a cablewinding hoist embodying improvements in accordance with the stated objects of the present invention.

Fig. 2 is a somewhat enlarged sectional view of one of the cable winding drums, taken substantially in its horizontal axial plane and howing the cable winding drum and its adjusting means, the drum supporting shaft, and the corresponding driving gear and clutch mechanism.

Fig. 3 is a cross section taken on line 33 in Fig. 2. a

Fig. 4. is a vertical section taken on line l-fi in Fig. 2.

Fig. 5 is a cross section of a shaft bearing, taken On line 5-5 in Fig. 2, and showing the adjustable split sleeve as clamped in the bearing.

Fig. .6 is a detail of the clutch adjusting nut and its turning lever.

Fig. 7 is a detail of the porting bearings. 1

Referring more in detail to the drawings- The frame structure of the present hoist com prises two parallel, transversely spaced and longitudinally extended base beams l and I (seen in Fig. 2) of channel or I-beam form, joined drive shaft and its supacross one end of the frame by spaced, transversely directed beams 2 and 2a, fixed rigidly b suitable means upon their upper edge flanges. Upon these cross beams the power plant, or

2 and 2a, the base frame 3 of engine, 3:1: is supported. The engine base frame is securely bolted, as at 4, to these latter cross beams and, being of heavy rigid construction, it serves in effect as a part of the frame structure. The engine 35c, as here shown, is disposed transversely of the base frame and its drive shaft 35 is equipped at one end with a belt driving pulley or gear 5.

Rigidly erected on the beams l and l, substantially medially of their ends, and in oppositely disposed relationship, are longitudinal frames 6 that are joined across their ends by a channel beam 6, as seen in Fig. 1. .Each of the frames 6 is equipped with bearings, as at I in Fig. 7, wherein a drive shaft 8 is rotatably mounted. This drive shaft is equipped at its end with a belt gear or pulley 9 alined with the engine ear or pulley 5 and a belt Ill extends about these parts to drive the shaft 3. Keyed or otherwise fixed on the shaft 8, at the inside of bearing 7, are driving gear wheels I! and l i (see Fig. 6) which, respectively, are in driving mesh With larger gear wheels l2 and If that are revoluble on cross shafts l3 and it which respectively support cable winding drums I4 and It for rotation thereon. The shaft l 3 is shown in Fig. 2 as being mountedat its ends in bearings lit-I5 which are formed on the top flanges of the longitudinal beams l and I, and the drum i4 is supported for rotation on this shaft through the mediacy of anti-friction bearings i6 and [6 applied and secured within the opposite ends of its hub portion. The inner raceway N of the bearing at one end of the drum engages against an annular shoulder IT on the shaft. At the other end of the drum, a split sleeve I8 is applied about the shaft and this engages at its inner end with the inner raceway of the corresponding hearing it. A nut i9 is threaded onto the shaft end to engage the outer, end of the sleeve to press it tightly against the bearing, its shifting on the shaft. The split sleeve 8 is seated in the frame bearing l5 and is to be clamped securely against movement after adjustment, by the bearing cap :1: as shown in Fig. 5.

At one end, the drum brake rim to which a brake band, not shown. may be applied to control the paying out of a cable from the drum, and at its other end, the drum has a flange 22 equipped concentric of the drum axle, with an annular inwardly tapered channel 23 for reception of correspondingly tapered clutch shoes 24 that are fixed to the inside face of the driven gear wheel l2.

Gear wheel i2 is mounted by an anti-friction bearing 25 to rotate freely on shaft l3 and there is provision for limited, longitudinal shifting of the gear on the shaft in order to engage, or disengage the clutch shoes with the side surfaces of the clutch channel. The means for shifting the driven clutch gear and for holding it in engaged or disengaged positions, form an important part of this invention, and will now be described.

By referring more particularly to Figs. 2, 3 and 4, it is to be observed that the hub portion 121: of gear wheel i2 contains the bearing 25 therein and the bearing assembly is held in plac by a ring or collar 3!) that is slidable along the shaft and is contained rotatably within a collar 3! that is fixed to the hub by bolts 32. The collar 3| and wheel hub may rotate freely about collar 39, but the wheel hub is not shiftable endwise of the collar due to the fact that the collar is held between the bearings 25 and the retained collar 3 l.

Fixed in the collar along shaft (3 and slidably through the shaft supporting bearing l5, are pull rods 35, shown best in Fig. 2. At their outer ends these rods are anchored by nuts 36 in an annular plate or disk 31 that encircles the shaft l3. Between the disk 31 and abutments 38 that are fixed on the bearing [5, are coiled springs 39. These ar held under compression, and act through the disk 31 and rods to automatically pull the gear wheel l2 to clutch releasing position Whenever the clutch is not positively held engaged.

To manually engage the complemental clutch of the drum and gear for driving the drum, and to retain them positively engaged, I provide the following means:

Formed diametrically through shaft l3, within that part that is enclosed by collar 33, is a slot 50, and extended therethrough is a disposed to engage edgewise at its or passage flat bar 5|, opposite ends, in

30. The passage 50 is of such extentlengthwise of the shaft [3 as to allow the movement of the bar therealong for the required clutch engaging or disengaging movement of the gear wheel I2 along th shaft. The adjacent end of shaft I3 is (4 is equipped with a 30 and extended therefrom seats 52 provided in the collar thus to hold the drum in place to prevent to move gear that is applied to the bas of cap 55. Thus,

by rotation of the cap in a direction to thread it onto the extension 54, the push rods 58 will apply inward pressure on cross bar 5| whereby l2 inwardly on shaft l3 to engage the clutch elements of gear and drum to drive the drum. When the cap is turned in the other direction to thread it outwardly, pressure through the push rods 58 is released and the pressure of the springs 38 On plate 31 shifts the gear outwardly and disengages the complemental clutch elements; .thus the drum is free to revolve on its shaft for unwinding th cable therefrom under control of whatever brake mechanism might be used.

It is noted in Fig. 6 that the hand lever 55 is formed with a split collar mounting that may be applied about the cylindrical outer surface of the nut 55 and then secured by a clamp bolt 57 that is passed through lugs 68 on the split ends of the collar. This provision'makes possible adjustment and securement of the lever to any desired operating position.

It has been shown in Fig. 1 of the drawings, that the drum [4' is carried on the cross shaft l3. This shaft is mounted in bearings. l5 on the upper .edge of frames 5. The mounting of this drum and details of its control means are like those of drum l4 already described, and the description will not be repeated, but will be understood to apply equally to both.

With the hoist so constructed, it will be understood that the cross shafts l3 and I3, when fixed in their supporting hearings, will add to the rigidity of the hoist structure and therefore these shafts, aside from that of mountings for the drums, serve the additional purpose of frame members. Y

The clutch control means is positive'and effectiv'e,and reduces wear to a minimum. The partsv 5i and 58 are easily removable for replacement when worn and these are the only parts that receive any appreciable amount of wear. The clutch setting devices, because'of their being on the shaft l3 and not on an independent member, at all times maintain the same relationship to the gear and drum.

Having thus described my invention, what I claim as new therein and desire to secure by Letters Patent is:

1. In a hoist of the character described, a

frame structure including spaced bearings, a

cross shaft fixedly mounted in said bearings, a

cable winding drum and a driven gear wheel ametric passage therein at the location of the wheel hub and having an axial bore from one end to said passage, a cross bar in the passage seated at its ends against the said collar, and pressure applying members disposed in the said bore and bearing against said cross bar and means threaded on the shaft against the said members to shift the gear wheel for engaging the clutch elements to drive the drum.

2. In a hoist of the character described, a frame structure including spaced bearings, a cross shaft fixedly mounted in said bearings, a cable winding drum and a driven gear wheel revoluble on the shaft between the bearings; said gear wheel being axially shiftable a limited distance on the shaft, complemental clutch elements on the drum and gear wheel adapted to be engaged and disengaged by the shifting of said gear wheel in opposite directions, a collar slidable on the shaft and secured in the wheel hub for rotation of the hub thereabout, pull rods, with ends fixed in said collar, extended along the shaft and slidable through one of said frame bearings, springs acting against said bearing and rods to shift the gear wheel for disengaging the clutch elements; said shaft having a longitudinal slot diametrically therethrough and having an axial bore from one end to said slot, a cross bar extending through the slot and seated at its ends in the collar, and a push rod contained in the shaft bore and engaged with the cross bar, and mean threaded onto the shaft end against the push rod and adjustable to move the gear wheel to engage the clutch elements to drive the drum.

3. In a hoist of the character described, a frame structure including spaced bearings, a cross shaft fixedly mounted in the bearings, a cable winding drum and a driven gear wheel revoluble on the shaft between the bearings; said gear wheel being shiftable 0n the shaft from and toward the drum and there being complemental friction clutch elements on the drum and gear to be disengaged and engaged by such shifting, a collar slidable on the shaft and fixed in the gear hub for rotation of the hub thereabout; said shaft having a longitudinal slot, diametrically therethrough at the location of the gear and having an axial bore from one end opening into said slot, a cap threaded onto that end of the shaft, a cross bar disposed in said diametric slot and seated at its ends against said collar, a plurality of push rods disposed in the bore in end to end contact between the cap and cross bar, a handle for turning the cap to thread inwardly on the shaft to efiect an application of force, through said push rods, to the cross bar for shifting the gear wheel to engage the clutch elements for driving the drum, and yielding means acting on the collar to move the gear to disengage the clutch elements upon the release of holding pressure by threading the cap outwardly on the shaft end.

4. In a hoist of the character described, a frame structure including spaced bearings, a cross shaft fixedly mounted in the bearings, a cable winding drum and a driven gear Wheel revoluble on the shaft between the bearings; said gear Wheel being shiftable on the shaft from and toward the drum and there being complemental friction clutch elements on the drum and gear to be disengaged and engaged by such shifting, a collar slidable 0n the shaft and fixed, in the gear hub for rotation of the hub thereabout; said shaft having a diametric slot thereth'rough at the location of the gear and having an axial bore from one end into said slot, a cap nut threaded onto that end of the shaft, a cross bar set in said diametric slot and seated at its ends in said collar, a plurality of thrust bearing elements in end to end contact, located in the bore and engaged with the cap and cross bar, a lever for turning the cap to thread it onto the shaft to effect an application of force, through said bearing elements, to the cross barfor shifting the gear Wheel to engage the clutch elements for driving the drum, pull rod fixed on the collar and extended along the shaft and slidable through one of the bearings, a plate fixed to the rod ends, abutments onthe bearing and springs disposed under pressure between the abutments and plate to urge the wheel utwardly to disengage the clutch elements when holding pressure is released upon threading the cap outwardly on the shaft end.

5. In a hoist of the character described, a frame structure including spaced bearings, a cross shaft mounted at its ends in said bearings and having an annular collar thereon, a drum revoluble on the shaft and having anti-friction bearings fitted in opposite ends of its hub portion for support of the drum on the shaft; one of said bearings being seated against said collar of the shaft, a split sleeve adjustable along the shaft and engaged against the other bearing of the drum to cooperate with the annular collar to hold the drum against movement along the shaft, a nut on the shaft, adjustable against the outer end of the sleeve to hold it at a set position, and said sleeve being seated by and clamped in one of the frame bearings.

SIDNEY s. MCINTYRE.