초록 ▼

A material handling apparatus includes a base, an upper structure and a bearing for supporting the upper structure on the base for rotation about an axis. The bearing transmits radial, axial and moment forces from the upper structure to the base and has a first race connected to the upper structure

A material handling apparatus includes a base, an upper structure and a bearing for supporting the upper structure on the base for rotation about an axis. The bearing transmits radial, axial and moment forces from the upper structure to the base and has a first race connected to the upper structure and a second race movable as a unit with the first race. Means are provided for removably connecting as a unit the upper structure and bearing from the base and comprises a locking member, a lug and means for receiving the lug. Either the lug or the retaining means is fixed to the second race of the bearing and extends downwardly therefrom and the other is fixed to the bed. The retaining means has a pair of retainer portions which are spaced from each other to closely receive the lug therebetween. The locking member is slidably received in an opening through the lug and is removably received in apertures in the retaining portions. Means are provided for releasably restraining the locking member from axial movement with respect to the retainer portions.

대표청구항 ▼

An apparatus such as a crane having a boom supporting upper structure connected to a bed structure by an annular anti-friction bearing which supports the upper structure for rotation about a generally vertical axis to swing the boom and transmits high radial, axial and moment loads from the upper st

An apparatus such as a crane having a boom supporting upper structure connected to a bed structure by an annular anti-friction bearing which supports the upper structure for rotation about a generally vertical axis to swing the boom and transmits high radial, axial and moment loads from the upper structure to the bed structure, said bearing having first and second relatively rotatable ring members and anti-friction elements between said members, means for fastening said members to different ones of said structures comprising generally vertical lug means arranged about said axis of rotation and spaced retainer means spaced angularly about said axis for closely receiving said lug means, one of said lug means and retainer means being on one of said members and the other on one of said bed structure and upper structure and a plurality of locking elements spaced angularly about said axis and extending transversely thereof into and between said spaced retainer means and through said lug means for locking said lug means and retainer means against separation, said locking elements being removably received in said retainer means and lug means to permit separation of said bed and upper structures upon removal of the locking elements, and means cooperating with each of said locking elements for releasably securing the elements in a locking position in said retainer and lug means.