US3131876A

US3131876A - Feed distributor assembly for cone crushers or the like

Info

Publication number: US3131876A
Application number: US184275A
Authority: US
Inventors: Howard M Zoerb
Original assignee: Nordberg Manufacturing Co
Current assignee: Nordberg Manufacturing Co
Priority date: 1962-04-02
Filing date: 1962-04-02
Publication date: 1964-05-05
Anticipated expiration: 1981-05-05

Description

H. M. ZOERB May 5, 1964 FEED DISTRIBUTOR ASSEMBLY FOR CONE CRUSHERS OR THE LIKE Filed April 2, 1962 United States Patent 3,131,876 FEED DiS'IREBUTOR ASSEMBLY FUR CONE CRUSHERS OR THE LIKE Howard M. Zoerb, Milwaukee, Wis, assignar to Nordberg Manufacturing Company, Milwaukee, Wis, a corporation of Wisconsin Filed Apr. 2, 1962, Ser. No. 184,275 2 Claims. (Cl. 241-202) This invention relates to an improved feed distributor mounting arrangement for use on gyratory crushers or the like.

A primary purpose of the invention is a means for mounting the feed distributor of a gyratory crusher such that it may be removed without disturbing the adjustment of the mantle.

Another purpose is to provide improvements in the means for mounting the mantle and feed distributor of a gyratory crusher.

Other purposes will appear in the ensuing specification, drawing and claims.

The invention is illustrated diagrammatically in the attached partial vertical section of a crusher.

A main crusher shaft is indicated at 10. The shaft may be carried by the usual eccentric sleeve, with some means for rotating the sleeve to cause the shaft to gyrate about a fulcrum, all of which may be conventional.

As the present invention is particularly concerned with the mounting means for the feed distributor, only the head and mantle of the crusher are shown. It should be understood that the mantle and head will be positioned Within a suitable main frame which will carry a bowl. The bowl is generally frusto-conic and will define a generally frusto-conic crushing cavity with the mantle 12 and the mantle extension 14, both of which may be formed of manganese steel or the like.

Mounted on the crusher main shaft is a crusher head 16. A head extension 18 may be suitably mounted, for example by cap screws or the like 20, to the head 16 and may have an inwardly extending generally axial upstanding portion 22. The head extension 18 overlies the upper end of the main shaft to mount the head.

At the upper end of the head extension 18 and on the outer surface of the axially upwardly extending portion 22 is a threaded surface 24 which engages a similarly threaded surface 26 on a lock nut 28. The lock nut 28 may have an outer formed surface 30 for engagement by a suitable tool to turn the lock nut on the head extension. The lock nut 28 may have a lower annular somewhat fiat surface 32 which bears against a torch ring 34 which in turn is seated upon the mantle extension 14. As the lock nut is turned down, compressive force is applied through the torch ring to the mantle extension 14 and to the mantle 12 to position and hold these elements on the head 16.

The construction of the torch ring is important and it may include a pair of generally inwardly extending spaced flanges 36 which define a recess 38 between them. The recess 38 may be filled with a suitable fireproof material, for example asbestos or the like, so that when the ring area 35 between the flanges is burned, there is no possibility of burning the lock nut. It is preferred that the upper and lower surfaces 40 and 42 of the torch ring have as great a cross sectional area as possible. During the operation of a crusher of this type, the direction of gyration is such that the mantle is self-tightening. For example, the lock nut may have right-hand threads and the direction of gyration may be the opposite.

The outer fnisto-conic surface 44 on the head and the inner frusto-conic surface 46 of the mantle as well as the inner frusto-conic surface 48 of the mantle extension de- 3,131,876 Patented May 5.,- 1964 fine a generally frusto-conic cavity 50. This cavity may be filled with a suitable backing material. Zinc has been used in prior crushers, but the present preferred backing material is epoxy resin. The head extension 18 may have an outwardly extending flange 52 which has an outer frusto-conic surface 54 generally in alignment with the surface 44 to further define the backing material cavity. The mantle extension 14, which may be secured'to the mantle 12 by an interlock 55, may have a pair of openings 56, one being for pouring the backing material and the other being a vent opening. Generally the openings 56 will be aligned with the surface 54 on the head extension which defines the upper end of the backing cavity.

Mounted above the head extension is a feed distributor assembly indicated generally at 58. In normal operation the material to be crushed will drop down upon the top 60 of the feed distributor and then will fall off the sides of the distributor and into the crushing cavity. The feed distributor 58 may include a generally central body portion 62 and an annular outwardly extending flange 64 which overlies the lock nut 28. A plurality of studs or the like 66 may extend down through the body portion 62 and be threadedly engaged with the upper end 22 of the head extension 18. The studs 66 removably mount the feed distributor to the head and provide for its easy removal. A seal or the like 68, generally annular in form, may be positioned between the body 62 and the lock nut 28 to prevent any material from reaching the threaded surfaces 24 and 26 and jamming the threads. A stud or the like 70 may be mounted at the top and generally at the center of the feed distributor and is used to secure a lifting ring to the assembly.

The use, operation and function of the invention are as follows:

One of the principal problems in gyratory crushers of this type is that when they jam, material may still feed into the top and, in many instances, the material feed will not be stopped until it has reached a level above the feed distributor. In order to clear the cavity, when jacks are not available, it is necessary to remove the feed distributor. Generally speaking, workmen will enter the area above the crusher and remove the material with shovels until the feed distributor is exposed. The feed distributor will then be removed so that the crushing cavity is exposed. However, in many prior crushers, for example the crushers shown in US. Patent 2,913,189 and in US. Patent 2,971,705, when the feed distributor was removed, pressure was taken off of the torch ring and hence off of the mantle extension and mantle. This aifected the mantle adjustment and required additional work before the crusher could be put back in operation. The present invention is directed to curing this problem in that the feed distributor may be removed without affecting the mantle adjustment. The distributor is held onto the head extension by a pair of cap screws or studs. These studs may be removed, the distributor lifted up, after which the crushing cavity will be exposed and the material in it may be cleaned out.

The complete downward thrust on the mantle extension and mantle is applied by the lock nut through the torch ring. The lock nut is sealed to the feed distributor but is in no way affected by its removal. The lock nut is threaded to the upward portion of the head extension so that the threads between the lock nut and the head extension will be as far as possible from the crushing operation. This is important as these threads can become beat up and worn if they are too close to the crushing cavity and take too great a pounding during operation.

Another important feature of the invention is the makeup of the torch ring. This is the ring that transmits the compression force from the lock nut to the mantle exteninwardly extending annular flanges which form the upper and lower surfaces of the ring. It is desired to have as great a cross sectional area as possible on the contacting surfaces of the torch ring so that there will be minimum slippage between the lock nut, the torch ring and the mantle extension. In this way, there will be minimum slippage of the mantle on the head during operation. An additional advantage of the torch ring is that the flanges define a space between them which may be filled with a fireproof material, for example asbestos or the like. The actual area of the torch ring which need be cut or burned by the torch is relatively thin so that the ring may be quickly removed when it is desired to change Another advantage is the particular configuration of the head extension. It has an outwardly extending flange, the outer surface of which is generally fIusto-conic and generally in alignment with the outer surface of the head.

shown and described herein, it'should be realized that there are many modifications, substitutions and alterations thereto within the scope of the following claims. I claim: i

1.. In a gyratory crusher or the like having a gyrataole' head constructed todefine a somewhat frusto-conic crushing cavity with a surrounding bowl, a fi'usto-conic mantle of manganese steel or the like on the head, an annular mantle extension on the head above and in engagement 4. with the upper edge of the mantle, a head extension mounted on the top of the head and extending axially above it, said head extension having a laterally outwardly extending flange with an outer surface generally in alignment with the outer frusto-conic surface of the head to define a cavity for a backing material with the head, mantle and mantle extension, a lock nut threadably connected to the head extension, at its upper end, and at a ring having a pair of spaced inwardly extending flanges forming the top and bottomof the ring, with a recess between said flanges,'a fireproof material filling said recess,

and a'feed distributor assembly removably mounted on the headextension and extending upwardly and outwardly above the lock nut, said feed distributor including a generally central body portion and an annular outwardly extending flange overlying the lock nut, and a plurality of securing members extending through said body portion and removably engaged with said head extension.

2. The structure of claim 1 further characterized by and including an annular seal between the upper inside surface or" the lock nut and thefeed distributor assembly.

References Cited in the file of this patent UNITED STATES PATENTS 2,296,280 Gruender Sept. 22, 1942 2,358,038 Symons Sept. 12, 1944 2,635,818 -Zoerb Apr. 21, 19532 2,814,450

Gruender Nov. 26, 1957

Claims

1. IN A GYRATORY CRUSHER OR THE LIKE HAVING A GYRATABLE HEAD CONSTRUCTED TO DEFINE A SOMEWHAT FRUSTO-CONIC CRUSHING CAVITY WITH A SURROUNDING BOWL, A FRUSTO-CONIC MANTLE OF MANGANESE STEEL OR THE LIKE ON THE HEAD, AN ANNULAR MANTLE EXTENSION ON THE HEAD ABOVE AND IN ENGAGEMENT WITH THE UPPER EDGE OF THE MANTLE, A HEAD EXTENSION MOUNTED ON THE TOP OF THE HEAD AND EXTENDING AXIALLY ABOVE IT, SAID HEAD EXTENSION HAVING A LATERALLY OUTWARDLY EXTENDING FLANGE WITH AN OUTER SURFACE GENERALLY IN ALIGNMENT WITH THE OUTER FRUSTO-CONIC SURFACE OF THE HEAD TO DEFINE A CAVITY FOR A BACKING MATERIAL WITH THE HEAD, MANTLE AND MANTLE EXTENSION, A LOCK NUT THREADABLY CONNECTED TO THE HEAD EXTENSION, AT ITS UPPER END, AND AT A POINT REMOTE FROM THE CRUSHING ZONE, TO BEAR AGAINST THE MANTLE EXTENSION AND TO APPLY A DOWNWARD THRUST AGAINST THE MANTLE AND MANTLE EXTENSION, THEREBY HOLDING THEM ON THE HEAD, A TORCH RING BETWEEN THE LOCK NUT AND MANTLE EXTENSION THROUGH WHICH THE COMPRESSIVE FORCE OF THE LOCK NUT IS APPLIED TO THE MANTLE EXTENSION, SAID TORCH RING HAVING A PAIR OF SPACED INWARDLY EXTENDING FLANGES FORMING THE TOP AND BOTTOM OF THE RING, WITH A RECESS BETWEEN SAID FLANGES, A FIREPROOF MATERIAL FILLING SAID RECESS, AND A FEED DISTRIBUTOR ASSEMBLY REMOVABLY MOUNTED ON THE HEAD EXTENSION AND EXTENDING UPWARDLY AND OUTWARDLY ABOVE THE LOCK NUT, SAID FEED DISTRIBUTOR INCLUDING A GENERALLY CENTRAL BODY PORTION AND AN ANNULAR OUTWARDLY EXTENDING FLANGE OVERLYING THE LOCK NUT, AND A PLURALITY OF SECURING MEMBERS EXTENDING THROUGH SAID BODY PORTION AND REMOVABLY ENGAGED WITH SAID HEAD EXTENSION.