US1628212A - Load lifter - Google Patents

Description

May 10,1927. 1,628,212

y F. J. WINTERER LOAD LIFTER Filed Augf 2, 1923 2 sheets-shet 1 Qmq t w QUA anormal May 10,1927.

F. J. WNTERER LOAD LIFTER 1923 2 sheets-snee#n 2 Filed, Aug. 2

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FRANK J'. WINTERER, 0F PHILADELPHIA, PENNSYLVANIA.

LOAD LIFTER.

Application -filedugust 2 1923. Serial No. 655,178.

My invention relates to load lifters and more particularly to an improved oiling system therefor and has for its object to provide means whereby the moving parts of the load lifter will be automatica 1y lubricated during itsoperation.

This object, and other advantageous ends which will be described hereinafter, I attain in the following manner, reference being.

had to the accompanying drawings in which Figure 1 is a vertical lonfitudmal section partly in full through a load lifter conf structed in accordance with my invention,

Figure 2 an enlarged section on line 2--2 of Figure 1,l

Figure 3 an enlarged section on line 3-3 of Figure 1. V

Referring to the drawings, 1 indicates a casing having an oil chamber 2 and a web 3 spaced from the side 4 of the oil chamber..

A sleeve 5 is rotatably mountedy in roller bearings 6 and 7. The bearing 6 is integral with the` web 3 and the' bearing 7 is disposed within the oil chamber and integral with the side 4. A hoisting drum 8 is keyed tothe sleeve andis provided with flanges 9 which have their peripheries 10 bent outwardl Guards 11 integral with the casin overlle the peripheries 10 so that the cab e, which is wound on the drum, will not slip over the flanges. A drumgear12 is keyed to the end of the sleeve 5- within the chamber and meshes with indium-pinion 13 fixed to a brake-shaft 14 which bears in roller bearings 15 within the oil chamber. A drum-brake is mounted on the brake-shaft and comprises a collar 16 slidably keyed to the casing by a lug 17 sliding within a groove 18 on the collar. A friction-wheel 19 is freely mounted on the brake-shaft within th collar and has `friction disks 22 mounted on its hub and engaging its sides.y 'A'drum-binding-wheel 23 is ixedfto brake-shaft 14 and provided with a face 24 which frictionall engages one of the disks 22. A motor-bin ing-wheel 25 is rotatably mounted onbrake-shaft 14 and provided with a face 6 which frictlonally engages the other di k. The hub of Wheel 25 is provided with a helical camming-face 27 adapted to engage a corresponding camming-face 28 on a collar 29 fixed to brake shaft 14. The term drumbrake will hereafter be used to desi ate the above structure or a structure havin a Jsimilar function, that is, to check the racing of the drum when lowering the load.

A motor-gear 30 integral with motor binding-wheel 25 meshes with a motor-pinion 31 keyed to amotor-shaft 32 which passes through sleeve 5 and has one end 33 rotatable in a roller bearing 34 in the oil chamber and the other end 35 rotatable in a ball bearing 36. Any suitable type of motor37 may be secured to the casing and connected to the motor shaft. A motor brake of a conventional type for stopping the motor when the current fed thereto is cut of,`engages a brake-wheel 38 fixed to motor-shaft 32 and is actuated by a spreader 46 secured to one end Vof a controller shaft 47 which is actuated by arms 49.- Shaft 47 forms a part of a conventional controller and is rockably mounted in a housing 58.

As means for stopping the motor when hoisting a load aboye the danger point to prevent the load from being raised too near 'the hoist and wrecking the same, I provide a limit-stop-lever 87 plvoted at 88 and provided with a lug 89 for limiting the downward swinging movement of the lever on its pivot. A lug 90 integral with the lever limits its upward swinging. movement. An off-set arm 91, integral with the lever, is

adapted to engage a finger 92 integral with' the spreader 46. A cable 93 is secured to .the drum in any suitable manner and has a hook 94 of any suitable t pe secured thereto. When the load is raise (above the danger point, the hook, or some part connected therewith, -will engage the stop lever which will actuate the controller shaft to stop the i motor. Y v

The means for suspending the lifter comprise a rectangular bracket 95 provided with a group of similarly spaced holes 96 in each of its sides.-

The oiling system includes pockets 101, top oil holes 102 and bottom oil holes 103 in the sleeve-bearing .7 and the motor-shaftbearing 34. The bottom oil holes 103 lead .into pockets 104 and oil holes 105 inthe brake-shaft-bearings 15. The motor-shaft 32 is provided with a spiral groove 106 for feeding oil to sleeve bearing 6. The bearing 6 is provided with a cap 107 for sealing it agains'toil leakage. p The oil is splashed from the bottom of the oil chamber into the oil pockets and the spiral groove by a fin-wheel 108 which may be fixed to the shaft or be an integral part vof the drum-bindin -wheel 23. Rotation of motor-shaft 32 wil cause the oil to follow the spiral groove into bear- The operation of the load lifter when raising a load is as follows: One of the arms 49 is pulled downwardly which rocks shaft 47 in housing 58 and simultaneously disengages the motor brake from brake-wheel 38 andV causes motor 37 to rotate.v Rotary movement from the motor shaft is transmitted tothe drum through the pinion 31, motorgear 30, the drum-brake, brake-shaftl/i, drum-pinion 13, drum-gear 12 and sleeve 5. This rotary movement is transmitted through thedrum-brake as follows: the motor gear A30 will rotate in such direction that camming face 27 will slide on camming face 28 to force motor-binding-wheel 25 against friction disk 22. The drum-binding-wheel 23, being fixed to the brake shaft, will r e-. sist this forcing movement, thus resulting in a binding engagement of friction wheel 19 and friction disks 22 between wheels 24 and 25. In other words, the collar 29, gear 30, disks 22, friction wheel 19, binding wheel 24 and brake shaft 14 forni a unitary structure which rotates as a single unit.

When the load has been raised to its danger point, the hook 94, or some part connected therewith, will engage limit-stoplever 87 and swing it upwardly. This swinging movement will cause arm 91 to engage linger 92 and rock controller shaft 47 into its neutral position and cut off the current supply to the motor. During this movement of the controller shaft spreader 46 will disengage the motor brake and allow it to grip brake-wheel 38, therebyl stopping the motor immediately after the current is cut off. When the load is raised and held in the raised position, the strain is entirely taken up by the drum-brake. merely serves as a means to immediately stop the motor when the current is cut off.

To lower the load it is merely necessary to rotate gear 30 in a reverse direction to that for raising the load. This movementof gear 30 will release its binding action against friction disks 22, thereby permitting the load to be lowered. A reverse movement to gear 30 is imparted by areverse movement of the motor which is produced by rocking shaft 47 in the opposite direction. When the motor rotates in reverse direction to lower the load the rotary movement of the motor shaft will be transmitted to gear 30. If the load should Start to travel downward faster than the rotation of the motor, the helical camming face 28 will slide against The motor brake cam face 27 forcing gear 30 into binding engagement with disk 22, and thereby retard or completely check the downward movement of the load. Thus the lowering of the load is completely controlled by the lowering` rotation of the motor.

During the rotation of the motoi, the lin wheel 108 will be rotated at high speed so as to splash oil from the oil chamber,which is filled to a pointabout midway of the brake shaft, against the roof of the oil chamber and into the pockets and the spiral groove; thus automatically lubricating the ldad lifter.

If desired the controller may be located on and the lifter controlled from a trailing cage or some point remote from the motor. In such case an electro-magnet would control the motor brake.

A load lifter constructed'in the manner above described requires practically no atv n n I u n l \\tention. 1n oiling or adjusting after it is installed, the adjustment of the drum-brake and the motor brake being automatic and the parts are readily accessible by simply removing the cover plate.

While I have described my invention as taking a particular forni, it will be understood that the various paits may be changed without departing from the spirit thereof, and hence I do not limit myself to the precise construction set forthbut consider that I am at liberty to make such changes and alterations as fairly come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a load lifter having a casing forming an oil chamber, a roof on the chamber,

pairs of bearings for rotating parts disposed one above the other in a chamber, a fin wheel rotatable between a pair of lower bearings and adapted to splash oil against the roof whence it is deflected into the u per bearings which have voil ducts forme in their bottoms whereby oil will pass from the upper to the lower bearings, and means to rotate the fin wheel.

2. In a load lifter having a casing forining an oil chamber; pairs of bearings disposed one above the other in the chamber, all the bearings having oil holes in their tops and the upper bearings having oil holes in their bottoms also, whereby oil may pass from the upper to the lower bearings; a sleeve rotatable in one of the upper bearings and extending into the chamber; a fin wheel rotatable between a pair of lower bearings and adapted to splash oil into the upper bearings and onto the end of the sleeve, and means to rotate the fin wheel.

3. In a load lifter having a casing enclosing rotating parts and forming an oil chamber; a sleeve bearing outside ofthe chamber; a sleeve having one end in said bearing and the other end extending into the chamber; a motor shaft .passing `through the sleeve .into the'oil chamber and having a spiral groove disposed within the sleeve;

.bearings in the chamber for thesleeve and motor shaft and having inlet oil holes in` their tops and outlet oil holes in their bottoms; rotating parts connecting the motor shaft with the sleeve; bearin s for said partsw having their inlet oil holes isposed beneath the outlet oil holes of the first mentioned bearings, and means on said 'parts for splashing oil into theinlet oil holes and into the `spiral groove whereby oil will be conveyed -to the sleeve bearing outside the chamber.

4. In a load lifter having a casing enclosing rotating parts and forming an oil chamber; a sleeve bearing outside of the .chamber; a sleeve having one end in said bearing and the other end extending into the chami ber; a motor shaft passing through; the

lsleeve into the oil chamber and having a lparts for splashing oil into the inlet oil oles and into the spiral groove whereby oil will be conveyed to the sleeve bearing outside the chamber. s O

5. A load lifter including a casing provided with an oil ychamber and a web at one side of the chamber; sleeve bearings in the chamber and web, the bearing in the oil chamber being provided with an oil hole in its top and bottom; a sleeve rotatable in the bearings; a motor shaft passing through the sleeve'into the oil chamber and having a spiral oil groove disposed within the sleeve; a motor shaft bearing for the motor shaft disposed within the chamber and provided with an oil hole in its top and bottom; brake shaft bearings within the oil chamber disposed beneath the sleeve bearing and the motor shaft bearing and provided with an oil hole in their tops for receiving oil from the bottom hole of the sleeve and motor shaft bearings; a brake shaft rotatable in the brake shaft bearings; a fin wheel on the brake shaft for splashing oil from the bottom of the chamber into the holes in the bearings and the spiral'groove, and means for operatively connecting the brake shaft with the sleeve and the motor shaft.

In testimony whereof I have signed my name to this specification.

FRANK J. WINTERER.

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