Integral bearing mounting and dismounting apparatus

Claim 2

Bearing mounting and dismounting apparatus comprising: a bearing disposed within a chock member for supporting a neck portion of a roll; retainer means slidable in the axial direction of the roll axis for preventing movement of said bearing in the axial direction; a lock nut disposed on said neck portion for fixedly supporting said retainer means on said neck portion, said lock nut including means for dismounting said lock nut together with said retainer means from the roll; a ring divided into halves and insertable between a projection formed on said neck portion and said lock nut for preventing movement of said lock nut in the axial direction, ring dismounting means for dismounting said ring from said neck portion, a first axially extending aperture formed in said retainer means, a second axially extending aperture formed in said lock nut, a rod member non-threadably insertable through said first and second apertures, and means on said rod member for pulling said rod member out of said apertures.

Claim 3

An apparatus as defined in claim 1, wherein said retainer is divided into an outer retainer member which is in contact with the chock member and an inner retainer member which is in contact with the neck portion and is slidable in the axial direction of the roll, wherein sealing material is interposed between the outer and inner retainer members, and wherein the outer and inner retainer members are each provided with protrusions for engagement with respective corresponding protrusions on each other.

Claim 4

An apparatus as defined in claim 1, wherein the lock nut is screwed to the inner retainer member and disposed on the roll neck, wherein said first aperture extends into said inner retainer member, and a third aperture is provided in said lock nut which is connected with said second aperture and is of a slightly larger diameter than said second aperture.

Claim 5

An apparatus as defined in claim 1, further comprising an integral bolt, wherein said rod member is tightly and non-threadably fitted in the first and second apertures, and wherein the rear end of the rod member is provided with a male screw portion to be engaged with female screw threads of the integral bolt.

Claim 6

An apparatus as defined in claim 1, further comprising an integral bolt, wherein said integral bolt is provided on the outer Periphery thereof with a male screw portion to be screwed into a female screw of the lock nut, and wherein said integral bolt is provided on the inner periphery thereof with a non-circular hole to receive therein a bolt rotating means for rotating the integral bolt to pull the rod member out of the first and second apertures.

Claim 7

Bearing mounting and dismounting apparatus adapted for use with a roll having a neck portion to be supported by means of a bearing assembly which extends along a longitudinally extending roll axis from a shoulder delimiting one end of said neck portion of said roll, said neck portion having a smaller diameter than a body portion of said roll, said neck portion having an angular projection at an end thereof, in which said bearing assembly comprises: a bearing member for directly supporting said neck portion; a chock member, a supplement inserted between said shoulder and an end of said bearing member for preventing movement of said chock member in the direction of the roll axis; a first retainer of which one end tightly contacts with the other end of said bearing, a second retainer surrounding said first retainer, said first retainer having a straight projection inserted into a straight groove formed in said neck portion and extending along the roll axis, said straight groove being opened at one end, said second retainer being fixed to one side of said chock member, said first and second retainer being in oil-tightly contact with each other through sealing means and respectively having stopping projections opposing each other, said first retainer being provided with a first aperture extending along the roll axis; a locking member having a second aperture extending therethrough, said locking member further having screw means engageable with screw means formed in said first retainer, a stopping portion being provided on said locking member at the side of said end of said neck portion; a ring member divided into halves and tightly inserted between said angular projection and said stopping portion of said locking member; means for fixing said ring member to said angular projection, and a rod member inserted through said first and second apertures for stopping a relative rotation of said first retainer and said locking member in a circumferencial direction with respect to the roll axis, said rod member being non-threadably inserted into said apertures; gaps being formed between said first retainer and said locking member so as to permit a change of the length in the roll axis direction of said first retainer and said locking member upon a relative rotation thereof.

Claim 8

Bearing mounting and dismounting apparatus adapted for use with a roll having a neck portion to be supported by means of a bearing assembly which extends along a longitudinally extending roll axis from a shoulder delimiting one end of said neck portion of said roll, said neck portion having a smaller diameter than a body portion of said roll, said neck portion having an angular projection at an end thereof, in which said bearing assembly comprises: a bearing member for directly supporting said neck portion; a chock member, a supplement inserted between said shoulder and an end of said bearing member for preventing movement of said chock member in the direction of the roll axis; a first retainer of which one end tightly contacts with the other end of said bearing, a second retainer surrounding said first retainer, said first retainer having a straight projection inserted into a straight groove formed in said neck portion and extending along the roll axis, said straight groove being opened at one end, said second retainer being fixed to one side of said chock member, said first and second retainer being in oil-tightly contact with each other through sealing means and respectively having stopping projections opposing each other, said first retainer being provided with a first aperture extending along the roll axis; a locking member having a second aperture extending therethrough, said locking member further having screw means engageable with screw means formed in said first retainer, a stopping portion being provided on said locking member at the side of said end of said neck portion; a ring member divided into halves and tightly inserted between said angular projection and said stopping portion of said locking member; means for fixing said ring member to said angular projection, and a rod member inserted through said first and second apertures for stopping a relative rotation of said first retainer and said locking member in a circumferencial direction with respect to the roll axis, said rod member being non-threadably inserted into said apertures; gaps being formed between said first retainer and said locking member so as to permit a change of the length in the roll axis direction of said first retainer and said locking member upon a relative rotation thereof.

Claim 9

An apparatus according to claim 6, in which said rod member is provided with means for pulling said rod member out of said apertures.

Claim 10

An apparatus according to claim 6, in which a pulling member for pulling said rod member out from said apertures is fitted on said second aperture of said locking member, said pulling member being provided with a hollow portion where an end portion of said rod member is accommodated.