US2861749A - Swinging jaw mounting and lubricating means - Google Patents

Description

Nov. 25, 1958 J. R. KUENEMAN ETAL 2,351,749

swmc'mc JAW MOUNTING AND LUBRICATING MEANS Filed Oct. 17, 1955 v INVENTORS JaH/v R. KuEA/EMa/v mvo Da/v KUENENHN ATTORNEY United States mom SWINGING JAW MOUNTING AND LUBRICATING MEANS John R. Kueneman and Don Kueneman, Oakland, Calif.

Application October 17, 1955, Serial No. 540,766

' 8 Claims. (Cl. 241-262) The invention relates to a crusher or pulverizer having a swinging jaw cooperative with a fixed jaw to define a downwardly-tapering crushing zone, and this application comprises a continuation in part of our copending application Ser. No. 48,184 filed September 8, 1948, now Patent No.-2,721,036 issued October 18, 1955. i In crushers of the present type having a crushing jaw swinging on lubricated bearings about a fixed horizontal support shaft, it is particularly important that provision be made for taking up wear axially of the shaft while adequate lubrication is provided and maintained for the bearings, and the present invention particularly relates to such accomplishments.

Accordingly, it is a present object to provide for the taking-up of any wear which may occur at the ends of the shaft-receiving bore of a crusher jaw, or other heavy-duty working element, swinging about a support shaft having its axis horizontal.

Another object is to provide a means for taking up any end wear without requiring a dismounting of the support shaft.

A further object is to so mount a jaw supporting shaft as to facilitate its mounting and dismounting on a carrying frame. I

An added object is to provide an improved lubricated jaw-support shaft provided with a particularly effective means for retaining the lubricant at the support bearings.

' The invention possesses other objects and features of advantage, some of which, with the foregoing, will be set forth or be apparent in the following description of 4 a typical embodiment thereof, and in the accompanying drawings, in which:

Figure 1 is a fragmentary upright and partially sectional view taken at the supported upper end of the movablejaw.

Figure 2 is an enlarged fragmentary sectional view of the structure shown in Figure 1.

Figure 3 is asectional view taken at the line 33 in Figure 2.

Figure 4 is a partial section taken at the line 44 in Figure 3.

Figure 5 is a perspective broken-out view of bearing ring of the structure.

Figure 6 is a face view of a sectional shim of the structure. 7

Noting that U. '8. Patent No. 2,721,036 of reference discloses the oscillatively hinged mounting of a jaw 23 on a shaft supported on and between relatively fixed frame sides in a manner which does not provide for a ready taking-up of any wear which may occur at the ends of the shaft-receiving bore of the swinging jaw 23, the herein-described and illustrated structure discloses 'an alternate support means for a shaft or hinge pin 231 carryingthe jaw 23 in an arrangement which not only provides for a taking up of any wear between the opposed faces of the mounted jaw and the frame sides without requiring a dismounting of a jaw support shaft 231, but also a thrust- "ice provides a generally more ready mounting and dismounting means for the shaft. Across its upper end, the jaw stock of the jaw 23 is provided therethrough with a bore having its end portions fixedly mounting therein bearing sleeves or bushings 61 journalled on the shaft 231, and an intermediate bore portion which defines a portion of the closed reservoir space 62 for containing a lubricant for the shaft, which lubricant may be supplied to the reservoir space 62 at a filler opening provided at the top of the jaw stock and normally closed by a screw plug 63. In the present structure, the fixedly spaced frame side plates 224 and 225 differ from the frame side plates of our identified prior patent only with reference to the manner in which the jaw-supporting shaft 231 is mounted at their top portions, and the bearing lubricant sealing-in means which includes the torsionally distortable sealing sleeves 64 which are operative to positively prevent a radial escape of lubricant at the jaw sides.

It will now be noted that the jaw-supporting shaft 231 most conveniently has a uniform circular cross-section along its length, and has end portions 231" thereof arranged for their normally clamped engagement in aligned complementary bores 226 provided in corresponding upper portions of the frame sides 224 and 225. In the present structure, radial and axial slots 227 extend upwardly from the bores 226 to the tops of the frame plates 224 and 225 and between opposed ears 228 extending upwardly from the plates at opposite sides of the slots and engagcable by clamp-bolts 229 which are extended through aligned holes through the ears 228 and are normally cooperative to effect a centered gripping of the shaft ends 231 within the bores 226. Since the frame plates 224 and 225 will usually comprise relatively thick and rigid elements, the release of a shaft and engaged in a bore 226 will not normally be efieotable solely by releasing the clamp bolts 229 thereat and requires a positive forcing apart of the ears 228 for opening the bore 226 to release a shaft end which has been fixedly clamped therein.

As particularly shown, one car 228 of each pair thereof is provided outwardly of the bolt holes therein with threaded holes which are arranged to receive normally withdrawn thrust bolts 230 which may be projected against the opposed ear as a means to separate the ears as required to open the bore 226 to facilitate the mounting or dismounting of a shaft 231 with respect to the holes 226, or to release the shaft end 231' engaged in either said bore; Means may be provided for positioning the fixed jaw supporting-shaft 231 in a predetermined longitudinally and rotatively adjusted position in the support bores 226; as particularly shown in Figures 2 and 3, a shaft end portion extends outwardly of the frame side 224 and provides a diametrical bore 232 which may radially and complementarily receive a positioning pin 233 which extends integrally from a base 234 bolted to the outer face of the frame side member 224 and functions to retain the engaged shaft against its rotation or axial shifting independently of the functioning of the clamp bolts 229.

The extending tubular jaw portions 23 at the ends of the shaft-receiving bore are coaxial'with said bore, and are embraced by corresponding inner ends of the previously-described lubricant-tight torsionally flexible sealing sleeves 64 which have their other ends-fixed to and about uniform annular thrust bearings 235 which are arranged to receive the shaft 231 in sealed relation thereto and are fixed to the inner sides of the frame plates 224 and 225 in coaxial relation to the bores 226 which sealedly receive the shaft end portions 231'. As shown, the ends of the sealing sleeves are sealedly fixed to the jawextensions 23 and thethrust rings 235 by mutually spaced clamp bands 236 which are operative aboutthe sleev'eends assume at the extensions and rings respectively, with the connections corresponding to those for the sleeves 64 as applied in the arrangement shown in Figures 4 and 10. By ref erence to Figures 2 and 5, it will be noted that a thrust bearing 235 is of uniform annular form, has its bore freely receiving the shaft 231, and is provided with an interior annular groove 237 in which a suitable sealing O-ring 238 is installed for tight encircling engagement about the received shaft to provide for a full seal against the axial escape of lubricant from the lubricant reservoir beyond said sealing ring.

A thrust hearing or ring 235 is shown as secured to the opposed side of a frame member 224 or 225 by the axial engagement therein of the threaded extremities of a pair of cap screws or bolts 239 slidably and freely engaged in holes 241 extending through the frame members in parallel relation to the shaft-receiving bores 226 in the members. As illustrated, the screws 239 are preferably disposed at opposite sides of, and at equal distances from a vertical plane through the shaft axis, and in a horizontal plane adjacent the bottom of the shaft, and the tightened screws 239 are arranged to draw a shaft-carried thrust ring 235 tight against the opposed face of the mounting frame member, or against one or more flat shims 242 interposed between the thrust ring and the frame member; in this manner, a thrust ring 235 mounted on the shaft 231 may be fixedly secured to the associated frame member 224 or 225 while sealedly mounting the outer end of a sealing sleeve 64. As particularly shown, the screws 239 at the frame side 224 are engaged through the base 234 for the shaft-positioning pin 233 for fixing said base and pin to the frame thereat. It will be understood that the operative disposal of the attaching screws 239 for the thrust rings 235 below the center line of the shaft provides an arrangement in which the screws and thrust rings do not interfere with a spreading opening of the bores 226 by a thrust action of the bolts 230.

It will be understood that, by reason of the fixed relation of the side frame plates 224 and 225 in the crusher frame assembly, the combined width of the jaw and the thrust rings 235 at its opposite sides can be no greater than the distance between the frame side elements 224 and 225, and would usually be less. Accordingly, and as particularly shown in Figures 1 and 2, flat annular shims 242 are fixedly engaged between the inner face of the frame plate 225 and the shaft-carried opposed thrust ring 235 for occupying the space between the frame sides not occupied by the jaw and the thrust rings, whereby to prevent an appreciable axial shifting of the jaw 23 along the supporting shaft 231 while the crusher is op erating. Also, the installation of additional or thicker shims may be needed between the frame-carried thrust ring and the opposed frame side for taking up wear as it may occur at the engaged lateral surfaces of the jaw and thrust rings during the use of a present crusher, and means are preferably provided for facilitating an installation of shims as desired or required without necessitating a disconnecting of the jaw and its support shaft. As is particularly brought out in Figure 6, a shim 242 comprises complementary sections 242 of appropriate outline cooperatively providing the central shim opening 244 which receives the shaft 231, it being noted that screw-receiving openings 245 are provided at appropriate points in the shim sections for freely receiving the screws 239 as a positioning means for the installed sections. The installation and/or removal of shims 242 may generally be effected at either or both of the frame sides 224 and 225 as may be desired or required, and the installed shims preferably occupy all available space therefor between the jaw sides and the operative jaw-engaging thrust rings 235 mounted on the frame sides.

A removal or installation of shims 242 is arranged to be facilitated by first freeing the shaft at the frame side at which shims are to be removed or inserted, withdrawing the appropriate cap screw 239 and loosening the other cap screw, operatively applying a wedge or other suitable thrust means (not shown) between a point of the frame side adjacent the shaft and an opposed point of the jaw side to thrust the jaw against the opposite frame side while springing the frame apart at the shaft sufiiciently to free a shim to be removed or provide space for an added or replacement shim. When the permitted removal or insertion of a first shim section 242' has been effected, the removed cap screw is reengaged with the thrust ring and the loosened cap screw is removed to thereby permit the removal or insertion of the second complementary shim section, after which the thrust means is removed and both cap screws are operatively reinstalled to complete the change; it will be understood that the described one-at-a-time method of removing or installing the shim sections of a pair prevents a rotary dislocation of the adjacent thrust ring during the operation. For gauging the available space for shims to be added, a said thrust means may be actuated between the jaw and a frame side before the corresponding shaft end has been released to permit a mutual spreading of the frame sides, whereby to positively push the other jaw side against the opposed thrust ring, after which a sliding of the other thrust ring along the shaft and against the opposed jaw side will open the shim-receiving space to be gauged by the use of a feeler plate or other means. In the present structure, all shims are shown as provided at the frame side 225, whereby the installed shaft positioning pin 233 need not be disturbed when shims are to be mounted or dismounted.

Understanding that crushers of the present type come within the category of heavy-duty machines, it will be noted that the arrangement of Figures 1 to 6 inclusive provides numerous assembly and operative improvements over the embodiment of Figures 1 to 15 inclusive of our prior Patent No. 2,721,036, all with reference to the lubricated support shaft for a relatively heavy swinging member such as the present movable crusher jaw. Thus, the disclosed manner of mounting and positioning the jaw supporting shaft 231 on and between the frame side plates 224 and 225 facilitates the mounting and removal of the shaft from either frame side, while eliminating any need for the precise spacing of the frame side plates required for the shaft mounting disclosed in our aforesaid patent. Also, the axial lubricant seal provided at the thrust rings 235, by positively preventing an outward capillary or pressure movement of lubricant along the shaft beyond it, eliminates any need for the sealed engagement of the shaft ends with the supporting frame sides as taught for the first jaw-support embodiment; the sealing-in of the lubricant thus provided at the shaft in combination with the use of the torsionally elastic sealing sleeve 64, is understood to provide a completely dustand-grit tight external seal for the lubricated radial and axial bearings which insures a maximum utility of the lubricant while keeping it clean of dust or grit which might penetrate a more-or-less unsealed lubricated zone. Furthermore, the present provision for the positively shimmed positioning of the jaw between the frame sides provides a means for preventing an undue lateral shifting of the working jaw resulting in a deleterious misalignment of the operating mechanism causing increased wear of frictionally engaged parts and/or excessive vibration.

From the foregoing descriptiontaken in connection with the accompanying drawings, the advantages of the present jaw crusher will be readily understood by those skilled in the art to which the invention appertains. While we have described the principle of operation, together with arrangements which we now consider to comprise preferred embodiments thereof, we desire to have it understood that theshowing is primarily illustrative, and that such changes and developments may be made,

asimi when desired, as fall within the scope of the following claims:

We claim:

1. In a jaw-type crusher having a frame comprising fixedly spaced side members providing aligned openable bores grippingly carrying a support shaft between them in fixed relation thereto and a swinging jaw providing a bearing bore having its end portions carrying mutually spaced bearing bushings fixed therein and receiving the shaft for a supported oscillation of the jaw thereon between the frame side members, means providing a lubricant admission inlet for the bore intermediately thereof, thrust ring members receiving the shaft and fixedly related to the side members in axial opposition to the jaw sides and provided with means circumferentially and sealedly engaging the shaft portions for axially sealing-in the bearing lubricant thereat, torsionally flexible liquid-impervious sleeves extending between the jaw sides and the opposed frame side members receiving them, and means sealedly fixing the sleeves to said jaw sides and thrust members for radially sealing-in the bearing lubricant thereat.

2. In a jaw type crusher having a frame comprising fixedly spaced side members providing aligned openable bores grippingly engaging a horizontal support shaft extending between them and a swinging jaw providing a bearing bore receiving the shaft for the supported oscillation of the jaw thereon between the frame side members, a lubricant admission means for said bore intermediately thereof, annular thrust rings slidably mounted on the shaft between the frame side members and the opposed jaw sides, sealing rings operative between the bores of the thrust rings and the received shaft for sealing off the bearing lubricant thereat, means fixing a said thrust ring to the opposed frame side member in adjustably shimmed relation thereto, and means operative to open a said support bore of the frame.

3. In a jaw type crusher having a frame comprising fixedly spaced side members supporting a shaft between them in fixed relation thereto and mounting a swinging jaw having a bearing bore receiving the shaft therethrough for the supported oscillation of the jaw thereon between the frame side members, a lubricant admission means for said bearing bore of the jaw intermediately thereof, thrust bearing rings slidably mounted on the shaft between the frame side members and the opposed jaw sides, sealing rings operative between the bores of the thrust bearing rings and the received shaft for sealing off the lubricant thereat, and screws releasably attaching said thrust bearing rings to the opposed frame side members to provide for the insertion of a spacing shim between a thrust bearing ring and the opposed frame side for reducing any side play of the jaw between the frame side members.

4. In a jaw type crusher having a frame comprising fixedly spaced side members fixedly supporting a jawmounting shaft between them, a jaw member providing a bearing bore receiving the shaft for the supported oscillation of the jaw thereon between the frame side members, a lubricant admission means for said bore intermediately thereof, annular thrust rings slidably mounted on the shaft between the frame side members and the opposed jaw sides, sealing members operative between the bores of the thrust rings and the received shaft for sealing off the bearing lubricant thereat, a pair of screws attaching said thrust rings to the opposed side frame members to provide for the insertion of a spacing shim between a thrust ring and the opposed frame side, and a shim having complementary sections arranged for their mounting in cooperative relation between the thrust ring and the frame side and each providing a transverse opening for receiving a different said screw therethrough for positioning the mounted shim sections in cooperative relation.

6 5. In a jaw-type crusher having a frame comprising fixedly spaced side members non-rotatively carrying a support shaft between them in fixed relation thereto and a swinging jaw providing a bearing bore receiving the shaft for a supported oscillation of the jaw on the shaft between the frame side members, means providing a lubri- .cant admission inlet for said bearing bore intermediately thereof, thrust ring members receiving the shaft and fixedly related to the side members in axial opposition to the jaw sides and provided with means circumferentially and sealedly engaging the shaft portions for axially sealing-in the bearing lubricant thereat, torsionally flexible liquid-impervious sleeves extending between the jaw sides and the opposed frame side members receiving them, and means sealedly fixing the sleeves to said jaw sides and thrust members for radially sealing-in the bearing lubricant thereat.

6. In a jaw-type crusher having a frame comprising fixedly spaced side members non-rotatively carrying a support shaft between them in fixed relation thereto and a swinging jaw providing a bearing bore receiving the shaft for a supported oscillation of the jaw thereon between the frame side members and having its sides spaced from the frame side members, means providing a lubricant admission inlet for said bearing bore intermediately thereof, thrust ring members receiving the shaft portions between the jaw sides and the side members and fixedly related to the latter members in axial opposition to the jaw sides and having their bores provided with means circumferentially and sealedly engaging the shaft portions for axially sealing-in the bearing lubricant thereat, torsionally flexible liquid-impervious sleeves extending between the jaw sides and the opposed frame side members receiving them, and means sealedly fixing the sleeves directly to said jaw sides and thrust members for radially sealing-in the bearing lubricant thereat.

7. In a support for an element arranged for its oscillatory rocking about a horizontal axis defined by a bearing bore through the element, a frame having fixedly and transversely spaced side members, a shaft extending through and from said element bore and having its extending portions fixed to said frame side members, thrust bearing rings carried on the shaft in axial opposition to the element sides and fixed to the opposed frame side members and provided with sealing rings engaging the received shaft portions for axially sealing-in the lubrication thereat, and torsionally flexible liquid-impervious sleeves di rectly connecting the bearing rings and the opposed element sides in fixed sealed engagement therewith.

8. In a support for an element arranged for its oscillatory rocking about an axis defined by a bearing bore extending through the element between opposite sides thereof, a frame comprising spaced side members, a shaft journalled in said element bore and having extending ends fixed to said frame members, means for introducing a bearing lubricant at an intermediate point of the element bore, thrust ring members receiving the shaft and fixedly and detachably related to the frame side members in coaxial relation to the element bore and in opposition to the element sides and provided with sealing rings engaging the received shaft portions for axially scalingin the bearing lubricant between the sides and members, and spacing shims engaged between a thrust ring member and the frame side member which mounts it.

References Cited in the file of this patent UNITED STATES PATENTS 1,746,212 Beringer Feb. 4, 1930 1,987,762 Symons Jan. 15, 1935 2,134,876 Hull Nov. 1, 1938 2,177,524 Gruender Oct. 24, 1939 2,302,723 Symons Nov. 24, 1942

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