US2172219A

US2172219A - Journal box

Info

Publication number: US2172219A
Application number: US98867A
Authority: US
Inventors: Thomas E Newberry
Original assignee: National Malleable and Steel Castings Co
Current assignee: National Malleable and Steel Castings Co
Priority date: 1936-09-01
Filing date: 1936-09-01
Publication date: 1939-09-05
Anticipated expiration: 1956-09-05

Description

p 5, 1939- T. E. NEWYBERRY 2,172,219

JOURNAL BOX Filed Sept. 1, 1936 4 Sheets-Sheet l INVENTOR flomasiljl bwbeny BY ATTORNEY Sept, 5, 1939.

T. E. NEWBERRY 2,172,219

JOURNAL BOX Filed Sept.- 1, 1936 {Sheets-Sheet 2 INVE'NTOR Thomas EJI/ewberzy BY ATTORNEY p 5, 1939- 'r. E. NEWBERRY 2,172,219

JOURNAL BOX 4 Sheets-Sheet 4 Filed Sept. 1, 1936 FF? k l J 4,:

INVENTOR Thomas E Newberzy ATTORNEY Patented Sept. 5, 1939 UNITED STATES PATENT OFFICE JOURNAL BOX of Ohio Application September 1, 1936, Serial No. 98,867

3 Claims.

This invention relates to journal boxes for locomotives of the electric or Diesel-electric type, and particularly to those boxes housing the journals that are operatively connected to the driving means of such locomotives.

In such boxes it has always been customary to make the top .of the bearing member flat and in contact with the flat roof of the box, thus eliminating relative vertical angular movements of the box and frame as well as limiting relative horizontal angular movement therebetween. This fiat surface contact has resulted in an unequal distribution of the load transmitted to the bearing and. journal whenever there has been a tendency for the journal to angle in a vertical plane relative to the box. I

In boxes used on these types of locomotives the angle of contact between the bearing member and journal must be considerably greater than with other boxes since, if the bearing member were permitted to ride-up on or lift relative to the journal, due to sudden starting or brake application, damage to the driving parts would result. Furthermore, such boxes must resist the torque of the driven axles as well as their proportion of the weight of the locomotive, which means that the resultant of the forces on the bearing is at an angle to the vertical. The larger angle of contact between the bearing and journal necessitates a deeper bearing with resultant difficulty of application and removal. Heretofore special means have been provided to apply and remove the bearing member either by deepening the journal box to permit it to be jacked up a suiiicient amount relative to the journal, or, by forming a removable cellar at the bottom of the box. In the former arrangement the dust guard opening at the rear of the box must be made larger to permit the increased amount of vertical movement. In this case the dust guard, which is a none too efiicient device, is given a greater burden because of the large opening it must fill. The removable cellar likewise has its disadvantages in that it is a complicated structure comprising a number of extra parts and involves considerable extra work to remove and apply it.

One object of my invention comprises an arrangement for permitting relative vertical angular movement between the journal box and journal whereby the load is at all times equally distributed over the bearing surfaces of the bearing member and journal. Another object is the maintenance of the wide angle of contact between the bearing and journal with the provision of novel means to permit easy assembly and removal of the bearing member without the necessity of increasing the dust guard opening or using a separate bottom on the box. Other objects and advantages will be best understood "nal.

in conjunction with the following description and drawings of an embodiment of my invention.

Figure 1 is a longitudinal vertical sectional view through the journal box, the journal and bearing member being shown in elevation.

Figure 2 is a horizontal sectional view taken on line 2-2 of Fig. 1 and. with the wedge removed.

Figure 3 is a transverse vertical sectional view taken on line 3-3 of Fig. 1.

Figure 4 is a View similar to Fig. 1 showing the method of assembly of the bearing member, and

Figure 5 is a front view with the cover removed and showing the box jacked up and the bearing member raised above the journal collar.

I have shown my invention applied to a free oiling type of journal box in which an oil conveying member is mounted on the journal to carry oil from a well at the bottom to the top of the boxwhere it is distributed to the bearing surfaees- In the drawings, the journal box I0 is provided with guides ll adapted to cooperate with the pedestals of the truck to maintain the boxes in fixed relation to each other both laterally and longitudinally. A journal l2 extends into the box through an opening l3 which is no larger than the opening found in the usual tance longitudinally of the bearing surface ofthe journal.

Instead of a single member between the journal and the top of the box, as is customarily found in boxes used on electric or Diesel-electric locomotives, my invention contemplates the use of two members, one of which is provided with a bearing surface for contact with the journal and the other is constructed so as to permit vertical angling between the box and journal and thus avoid concentration of the load on certain areas of the aforesaid bearing surface. The bearing member l6 has a bearing surface I! on its under side adapted to rest on the jour- On each side of member I6 is a surface l8, which, in cooperation with surfaces 15 on stop lugs l4, limits horizontal angular movement of the bearing member and hence the journal relative to the box. The average clearance between each surface l5 and corresponding surface I8 is .005 of an inch, so that it will be apparent that movement between the parts will be practically nil.

Between the bearing member and the top of the journal box is positioned a member l9 usually r termed the wedge. Theunder surface 20 of the top wall of the box is flat, so that in order to permit angular movement between the journal and box, the upper surface 2| of member [9 is curved. The load applied to the top of the box is transmitted to the journal through the surfaces anad 2| and is equally distributed over the longitudinal extent of surface ll of member I6 regardless of the vertical, angular relation between the journal and box. Side surfaces 22 of member 19 may be spaced a substantial distance from surfaces I5 on the stop lugs so as to avoid the necessity of machining surfaces 22. Hori- 'zontal angular movement of member 19 is preferably limited by contact between angularly disposed surfaces 23 on member I9 and similar surfaces I8 on member [6.

I have found that in boxes of thistype the angle between the extreme points of contact between the bearing member and journal must at least be in the order of 140 so as to eliminate, as far as possible, the danger of starting and braking thrusts raising the bearing member relative to the journal. With the use of a separate bearing member and wedge, interlocking means must be provided on the members to limit outward longitudinal movement of the brass relative to the wedge. This is in the form of an upwardly projecting lug 2 3 which contacts the rear end 25 of the wedge to limit movement in one direction. The forward end 25 of the wedge engages stop lugs 21 at the front of the box to limit outward movement of the wedge relative to the journal box. At the rear of the bearing member, surface H is curved radially outward to form a shoulder 28 adapted to be engaged by curved surface 29 on. the journal. An outward thrust of the journal is therefore transmitted to the bearing member by surface 29 contacting shoulder 28, from the bearing member to the wedge through lug 25 and surface 25, and from the wedge to the journal box by means of surface 26 engaging stop lug 2T. Thrust in the opposite direction is transmitted from an enlarged collar 3!] on the end of the journal to the end 3| of bearing member I6, which member is formed with laterally extending lugs 32 adapted to engage end surfaces 33 of stop lugs M to limit inward movement of the journal.

Clearance limitations in journal boxes are such that the distance between the under side 34 of stop lug 21 and the curved surface of collar is rather definitely fixed. With the use of a relatively deep bearing member, assembly and removal thereof is impossible unless some means is specifically provided for this purpose. In Figs. 4 and 5 the journal box is shown raised relative to the journal until the bottom of the dust guard opening is in contact with the oil slinger or obturating ring 35. In this position stop lug 21 is above surface 26 on the wedge and the latter may be removed through opening 36 in the front of the box. In removing bearing member l5, however, a different situation exists since the distance from the bottom of the bearing member to the top of lug 24 is greater than the space between the journal collar and stop lug 21 through which said member must pass. It will be appreciated that, due to the different curvatures of the collar 30 and bearing surface I! the bearing member, during application or removal thereof, must be raised a distance greater than the height of the collar. When the member is raised the required distance there is a considerable overlap between lug 24 and surface 21. In other words, the front part of the bearing may be removed but lug 24 engages lug 21 to prevent removal of the rear of the bearing.

this point and permitting the member and hence lug 24 to drop sufiiciently to eliminate the overlap, whereby the bearing may be removed from the box. In Figs. 4 and 5 the bearing member is shown in the process of being removed. The

bearing is first tipped, as shown by the solid lines in Fig 4, and then slid along the collar until the offset surface 38 is reached, at which time it drops to the position shown in Fig. 5 and by the dot-dash lines of Fig. 4. In this position the top surface of lug 24 is below the stop lugs 21 and the bearing is free to be moved out of the box.

The bearing member l6 may be cut away at either side of its rear end, as at 4!]. This cutaway portion terminates at its forward end in a shoulder 42 substantially in line with end 41 of stop lug [4, so that as wear takes place between surfaces l5 and It a shoulder will not be formed in surface l8. Shoulder d2, towards the bottom of the bearing member, slopes downwardly and forwardly, as at 43, for the purpose of conducting oil coming in contact therewith forwardly of the journal box and away from opening l3 in the rear end thereof.

Surfaces l5 and it will receive adequate lubrication from the overflow of the free oiling sys tern, and any wear between these surfaces caused by vertical angling of the journal box will be thereby reduced to a minimum.

The terms and expressions which I have employed are used as terms of description and not of limitation, and I have no intention, in the use of such terms and expressions, of excluding any equivalents of the features shown and described or portions thereof, but recognize that various modifications are possible within the scope of the invention claimed.

What I claim is:

1. A bearing for a railway journal box having a bearing surface extending over an arc of at least 1&0", an upwardly extending projection at the inner end of said bearing, a portion of the lowermost surfaces of said bearing being offset in the direction of and substantially directly beneath said projection to permit application and removal of said bearing into and out of said journal box.

2. In a device of the class described a journal box, a journal having a collar at its end, bearing means between said journal and the top of said box, said bearing means having a bearing surface in contact wtih said journal over an arc of not less than about 140 and having an upwardly projecting portion above a part of said bearing surface at the inner end of said box, the circumferential extent of said bearing surface directly below said projecting portion and of a portion directly adjacent thereto toward the outer end of said box being less than that of other parts of said surface.

3. A bearing member for journal boxes having a bearing surface of about 140 of arc and having an upwardly extending projection above a portion of said surface, said portion of said surface and a portion directly adjacent thereto being of reduced circumferential extent.

THOMAS E. NEWBERRY.