Патент USA US2410927код для вставки
Nov. 12, 1946. ‘r. L. CALLAHAN ET AL - BEARING AND SEAL CONSTRUCTION ' ‘ Filed May 17, 1943 - 2,410,927 2,410,927” Patented Nov. 12, 1946 UNITED STATES PATENT OFFICE 2,410,927 _ BEARING AND SEAL CONSTRUCTION Thomas L. Callahan and Jay .Weaver, Richmond, Ind., assignors to International Harvester Com pany, a corporation of New Jersey Application May 17, 1943, Serial No. 487,224 ' 3 Claims. (Cl. 308-19) . > 2 1 This invention relates to a seal construction. seal, which is held in a retaining member having integral pieces extending therefrom into engage More speci?cally it relates to the application of such a construction to a furrow opener. ment with a support for the furrow opener in such a manner as to hold- the resilient seal It is a considerable problem to keep dirt and other extraneous matter out of the bearing of a furrowopener, since the furrow opener normal ly runs in the ground. A very ef?cient sealing of the bearing is required. On the other hand, it is known, though perhaps not in the case of fur row openers, to provide a seal construction in volving a seal against which another rotating against lateral movement and to urge the metal seal member against the rotating member se cured to the disk furrow opener. The metal seal is locked to the retaining member so that rela tive rotation between these parts is prevented. 10 metal part slides, and a yielding seal of rubber or 1 absorbent material, which is saved from wear be- - In the drawing: Figure 1 is a perspective view with parts re moved of the novel seal construction of the pres ent invention applied to‘ a disk opener; v cause it contacts only stationary parts. The en Figure 2 is a sectional view taken along the tire wear in the seal construction is assumed by 15 line 2-2 of Figure 1; _ ‘ the metal seal. One of the di?iculties with an Figure 3 is a perspective view of a member that arrangement of this sort is that the variation in serves asa bearing support for the disk opener; the direction of force applied by the rotating Figure 4 is a perspective view of a stationary metal part to the metal seal will cause the metal metal ‘seal; ’ seal to tilt with respect to the supporting struc 20 Figure 5 is a perspective view of a portion of a’ ture and locking lugs thereof for holding the metal seal against rotation. The result is wear support to which the bearing support for the disk opener is attached; and between the locking lugs and the parts of the Figure 6 is a perspective view of a retaining metal seal it contacts. Furthermore,_'the rota a member. tional force tending to turn the metal seal causes 25 Reference character It! indicates a support de the seal to tilt around the locking lugs and so pending from a carrying frame, not shown. The to create a gap for dust to enter. Another dis- ‘ depending support I0 has a boss ll projecting advantageiisthat the yielding seal, though not‘ therefrom and as shown in Figure 5 having op posite ?at sides l2 and connecting arcuate sides that its sealing ef?ciency is seriously affected. 30 IS. A bearing support l4 engages the support I 0, in contact with rotating parts, may be moved so . The present application has to do with improve ments in this type of seal construction and the applying of such a construction to a furrow opener. _ ’ “ H An object of the present invention is to‘ pro vide an improved seal construction. w receiving the boss H in a recess. which is circu lar except for a ?at side It. The ?at side l6 of the recess 15 engages one ?at side 12 of the boss II and thus prevents relative rotation between 35 the bearing support I‘ and the depending sup port It). A bolt l1 and a nut l8 secure the bear A further object is to improve a seal construc ing support 14 upon the depending support Ill, tion comprising a metal seal having sliding con the 'bolt H extending through an opening It‘ in tact with a rotating part and a resilient seal con the depending support I 0 and an opening IS in tacting only stationary parts. . 40 the bearing support l4, and a head 20 of the bolt Another object is the provision of an improved ll resting within an enlarged portion 2| of the seal construction for the furrow opener. _ opening’ I9. The bearing support It has a radial Still another object is to provide a furrow bearing ?ange 22 having afrusto-con'ical outer opener with a seal construction involving a metal surface 23 and flat end surfaces '28 and 25.‘ A seal and a resilient seal. 45 jdisk furrow opener 26, positioned adjacent the Other objects will appear from the disclosure. end surface 25 of the radial ?ange 22 of the sup according to the present invention, a member secured to a disk furrow opener rotates in slid ing sealing contact with a stationary metallic seal. porting member IQ, is Journaled on the bearing ' support it by means of a rotatable metal mem ber 21 secured to the disk 26 by rivets 28. A, The member secured to the disk furrow 50 gasket 29 spaces the member 2'! and the disk 26. opener is dished so that there is provided between the contacting faces of the member and the metal _ The member El-has an inwardly directed radial ?ange 80 having one flat end face 3! in engage seal a space for lubricant extending outwardly to ment with the ?at end surface 2% of thebearing a narrow region of contact between these parts. ?ange 22 of the bearing support It and another In engagement with the metal seal is a resilient 65 end face 32 which is dished. Engaging the 2,410,927 3 4 . of the radial ?ange 30 of the rotatable member 21 and an adjacent portion of the bearing sup 21 is a ?at end face 33 of a metal seal 34. A second end face 35 of the metal seal 34 is engaged by a packing or sealing member 36 of suitable material, such as felt or rubber. The seal 33 is partially embraced and retained in a cupped re taining member 31 having a circular side portion 33 and a ?at end portion 39. The metal seal 34 has at the end face 35 a ?ange 40 having dia metrically opposed notches 4|, which receive out wardly extending projections 4|l on the retain ing member 31. A municate with a space 51 between the inner edge dished face 32 of the rotatable bearing membe port i4. The space 51 communicates with a space 58 between the dished face 33 of the ?ange 33 of the rotatable bearing member 21 and the ?at face 33 on the metal seal 34. Escape of lubricant in an outward direction from beyond a region of contact 53 between the bearing support 14 and 10 the inner surface of the stationary member 34 is , prevented by sealing contact of the resilient seal 36 with the end face 35 of the metal seal 34. Escape of lubricant in an axial direction is pre As shown in Figure 6, the retaining member ‘ vented by sealing contact of the inner peripheral ' 31 has pieces 42 struck from the ?at end por tion 39 and extending at a slight angle thereto 15 surface of the resilient seal 33 with the bearing support l4. Sealing at this region is most im (or at a small angle to a planetransverse to the portant and is probably more di?icult than seal axis of rotation) and terminating in end portions ing between the seals 34 and 33, since the resil 43 extending at right angles to the ?at end por ient seal 36 may have some movement with re tion 33 of the retainer 31. As seen in Figure 5, the depending support it is provided with a 20 spect to the bearing support 14. Lubricant is, of course. supplied through the groove 44 and three ribs 45 extending across the "lubricant nipple l3 and passes through the pas groove 44. The groove 44 has an inner side .44 sage 32, thevgroove 53, the space 44, and the which extends a greater distance from the base grooves 53 and 86 into the spaces 51 and 53. of the groove than does an outer side 41 of the Because the contacting end faces 32 and 33 on groove so that there is provided a surface 43 in the rotatable member 31 in the- metal seal 34 wardly of the groove 44 and outwardly of the are, respectively, dished and flat, these surfaces boss ll higher than a surface 43 outwardly of contact only along a narrow region 43 outwardly the groove 44. The diameter of the inner side of the space 53. This region 43 is, at the start. 43 ofthe groove 44 is slightly larger than the diameter of a circle determined by the portions 30 theoretically a line but, as wear progresses, has a measurable width. Lubricant may escape from 43 on the pieces 42 struck from the end surface the space 33 outwardly through the region of 33 of the retainer 31 so that the pieces 4! are contact 33, since this contact is made only by sprung outwardly as the endportions 43 are in metal parts that are formed of unyielding mate serted into the groove 44 and the end portions 43 grip the inner side 43 of the groove 44. The 35 rial and are resiliently held against one. another by the yielding form of the spring pieces 43 on gripping of the inner side 43 of the groove 44 the retainer 31, However, a slight escape of lu by the end portions 43 causes the retaining mem her 31 to be secured to the depending support I3 _ bricant is not disadvantageous. Since there is a de?nite space 33 de?ned by the ?at surface in such a, manner that movement of the retain ing member 31 transverse to the axis of rotation 40 face 33 and the dished face 32, there is consider of the disk 33 is prevented. This also prevents , able lubricant immediately inward of the ‘region of contact 60 which prevents the entrance of a similar transverse movement of the sealing extraneous material through the region of con member 33 for a purpose to be described pres tact it. It has been stated that the springing ently. . ~ The retaining member 31 may move angularly 45 out of the pieces 43 on the retaining member 31 provides gripping engagement of the end por ' with respect to the depending support Ill but only to the extent permitted by the projections 45 in the groove 44. After a certain angular move ment, the end portions 43 on the pieces 43 con tact the projections 43, and further angular movement is prevented. Since the end portions 43 extend substantially along the axis of rota tion, they will cooperate with the ribs 43 to pre vent angular movement of the retaining member 21 regardless of the direction of rotation of the disk 28. Thus, the retaining member 31 is held against rotation with respect to the depending ; support Ill, whether the disk it extends trans versely to the left of the depending support I. of the direction of movement through the ground or tofthe right. , _ Lubricant is applied through a lubricant nip ple 50 secured to the depending support It in an enlarged end 51 of a lubricant passage 53. The passage 52 communicates with a groove 53 in the opening is in the vbearing support i4 and in the enlargement 2| of the opening 19. The groove ‘53’ communicates with a space it between the furrow disk 26 and the end face 25 of the tions 43 with the inner side 44 of the groove 44 A from the depending support III, causing the re taining member 31 to be held against movement transverse to the axis of rotation, and this in turn prevents such movement of the resilient ‘seal 36 contained within the retaining ring 31. - It is exceedingly advantageous to hold the resil-_ ient seal against such transverse movement, for when it is so held, its inner diameter remains constant, and thus there is maintained a good sealing relation between the inner side thereof and the bearing support 14. It is believed to be new, in a seal construction involving a metal or unyielding seal in sealing contact with a ro tating part and a yielding seal formed of mate rial such as felt or rubber, for the yielding seal to have its inner peripheral surface with a sup porting member. The pieces 42 struck from the ?at end 38 of the ‘retaining member 31 constitute resilient means which urge the resilient seal 38 against the metal seal 34 and the'metal seal 34 against the rotatable member 21. Thus, there is a sui'ii , radial ?ange 22. This space-communicates with 70 cient sealing maintained between the resilient three grooves 55 in the frusto-conical surface 23 of the radial ?ange 22 of the bearing support M. The grooves 55 are shown in Figure 3, and they in turn communicate with grooves 56 in the end face 24 e! the ?ange 22, The grooves 56 com seal 86 and the face 35 of the metal seal 34 and between the rotatable member 21 and the metal seal 36 at the region of contact to. The notches $1 in the ?ange 40 of the stationary bearing member 34 cooperate with the projections 4!‘ on 2,410,927 5 the retaining member 3? so that the retaining member 37 prevents rotation of the stationary bearing member 34. Since axially directed ring 36 has been stated to be formed of felt or rubber or any other suitable material that is re silient ‘or yielding. forces on the disk 26 will cause of both the metal seal 33 and there is no wear at the notches seal 89 and the projections M“ axial movement the retainer 31, 5| in the metal on the retainer 31 due to relative movement of these parts. Fur thermore, any tendency of the metal seal 35 to The intention is to limit the invention only within the scope of the appended claims. What is claimed is: 1. In combination, a support having a bearing ?ange, a rotatable member of unyielding mate rial rotatably bearing against the flange, a seal-‘ tilt about locking projections Ma due to rotational 10 ing ring of unyielding material having a face in forces on the metal seal 34 and so to provide a sliding sealing contact with a face of the rotat able member, a sealing ring of yielding material gap for dust to enter is avoided, because the having a face in sealing contact With the un locking projections ?le, being on the retainer 31, yielding sealing ring and an inner peripheral sur tilt with the metal seal 34. Figure 2 shows the thickness of the packing 15 face in sealing contact with the support, the con member 3'5 to be su?iclent to hold the stationary tacting faces of ‘the rotatable member and the unyielding sealing‘ring being so shaped as to con bearing member 34 out of contact with the re tact only at a radially outermost narrow region taining member 31 except for contact at the so as to provide radially inwardly thereof a notches 6| and the projections 4|“. However, wedge-shaped space between the faces for lu the sealing member 35 may be compressed suin bricant out to the actual region of contact to keep ciently so that there is contact between the cir the contact region closed by lubricant and thus cular portion 38 of the retaining member 31 and to prevent the entrance of foreign material from the stationary bearing member 34. Thus, the the exterior. stationary bearing member is given the resilient 2. In combination, a support having a bearing support of the retaining member, and the resil 25 portion, a rotatable member of unyielding ma iency of the pieces 52 struck- from the retaining member 3] permits the stationary member 34 and the retaining member 3'5 to tilt somewhat terial rotatably bearing against the bearing por tion, a sealing ring member of unyielding mate rial having a face in sliding sealing contact with upon changes in direction of pressure applied to the furrow disk 26. 30 a face of the rotatable member,_ the contacting faces of the members being so shaped as to con It will be apparent from the foregoing descrip ,tact' only at ‘a radially outermost narrow region tion that a new and novel bearing and seal con so as to provide radially inwardly thereof a space struction has been provided. This construction between the members for lubricant out to the ac per se has novelty, and there is novelty in its ap plication to a furrow opener. One point of 35 tual region of contact to keep the contact region closed by lubricant and thus to prevent the en novelty is the preventionv of .rotation of an un trance of foreign material from the exterior, a yielding seal by keying to a retaining member for sealing ring of yielding material having a face in a yielding seal member, the retaining'member sealing contact with the unyielding sealing ring being resiliently mounted so that it tilts with the unyielding seal and thus prevents-wear upon 40 member and an inner peripheral surface in seal ing contact with the support, a retaining ring tilting due to relative movement of the parts and partially embracing the yielding sealing ring and opening of the seal due to tilting. Another point of novelty is the supporting of a resilient seal in a retainer that is held against movement trans verse to the axis of rotation. Another point of novelty is the provision of integral extensions upon a retainer for a resilient'seal which serve not only to grip a support to prevent movement transverse to the axis of vrotation and rotation itself but also to serve as a resilient means for urging the resilient 'seal contained in the re tainer against any unyielding seal. Still another point of novelty is the shaping of contacting sur faces of an unyielding seal and a rotatable mem= her in such a way that actual contact is pro= vided only over an outermost region, and there isia substantial space inwardly of the outermost ’ having portions cooperating with portions of the unyielding sealing ring member to prevent rela tive rotation therebetween, and resilient means acting between the support and the retaining ring to prevent rotation of the retaining ring with respect to the support and to urge the yielding sealing ring against the unyielding sealing ring member and the unyielding sealing ring member against the rotatable member. 3. In combination, a support having a bearing ?ange, a gotatable disk opener adjacent the‘ ?ange, a member secured to the disk opener and rotatably bearing against the bearing ?ange, an unyielding sealing ring mounted upon the sup port and having sliding sealing contact with the member, a yielding sealing ring having a face in region for lubricant which will prevent the en sealing contact with the unyielding sealing ring trance of foreign material through the said nar row outermost region of contact. Another novel 60 and an inner peripheral surface in sealing con tact with the support, a retaining ring holding feature is provision of sealing contact between the yielding sealing ring andv having portions the support and an inner peripheral surface of cooperating with portions-on the unyielding seal the yielding seal. ing ring to prevent relative rotation of the re Various parts such as the rotatable member 2?, the metal seal 36, the resilient seal 36, and the 65 taining ring and the unyielding sealing ring, and resilient means urging the yielding sealing ring retainer 3? have been described as members, and against the unyielding-sealing ring and the un ~ it should be evident that they may be also de . scribed as rings since they take this form. The member 2? and the ‘sealing ring 34 are normally formed of metal. and thus they may be consid 70 ered to be hard and unyielding. The sealing / yielding sealing ring against‘the member. THOMAS L. CALLAHAN. " JAY WEAVER.