Chain block
AssigneeKito Corporation
InventorAkinori Shirota
Life of this patent
Estimating the term…
Abstract
A chain block includes: a main body frame; and a gear cover that is attached to the main body frame to form an internal space sealed off from an outside between the gear cover and the main body frame, and rotatably supports one end side of a reduction gear member, wherein a gear-side frame part is provided with a bottom part and an outer peripheral wall part projecting from an outer peripheral edge portion of the bottom part, and an upper rib having both ends coupled to the outer peripheral wall part is provided at a portion of the gear-side frame on an upper side where an insertion hole and a link shaft are provided and on a side nearer a center of the internal space than is the outer peripheral wall part, and the upper rib is provided adjacent to the insertion hole and the link shaft.
Claims8
A chain block capable of moving a cargo in a vertical direction by transmitting driving force of a handwheel through a drive shaft and a reduction gear member to a load sheave member so as to hoist and lower a load chain wound around the load sheave member, the chain block comprising:
- a main body frame that has a gear-side frame part housing the reduction gear member and directly or indirectly supporting one end side of the reduction gear member in a rotatable state;
- a gear cover that is attached to the main body frame by a fixing means to form an internal space sealed off from an outside between the gear cover and the main body frame, and rotatably supports the one end side of the reduction gear member;
- and
- an upper hook that is coupled to the gear side-frame part via a connecting means, for suspending the main body frame from the upper hook,
- wherein the gear-side frame part is provided with a bottom part and an outer peripheral wall part projecting away from an outer peripheral edge portion of the bottom part in an axial direction of the drive shaft, and
- an upper rib which is unitary with and extends from opposite portions of the outer peripheral wall part with reference to the upper rib is provided at the gear-side frame part on an upper side where the connecting means is provided such that a distance between the upper rib and the drive shaft is shorter than is a distance between the outer peripheral wall part and the drive shaft, and the upper rib is provided adjacent to the connecting means wherein a lower rib which is unitary with and extends from opposite portions of the outer peripheral wall part with reference to the lower rib is provided at a portion of the gear-side frame on a lower side in the vertical direction distant from the connecting means in a suspending direction such that a distance between the lower rib and the drive shaft is shorter than is a distance between the outer peripheral wall part and the drive shaft, and wherein an inner peripheral wall part including the upper rib and the lower rib;
- and the outer peripheral wall part located between the upper rib and the lower rib is provided in an elliptical shape or an oval shape in plan view.
A chain block capable of moving a cargo in a vertical direction by transmitting driving force of a handwheel through a drive shaft and a reduction gear member to a load sheave member so as to hoist and lower a load chain wound around the load sheave member, the chain block comprising:
- a main body frame that has a gear-side frame part housing the reduction gear member and directly or indirectly supporting one end side of the reduction gear member in a rotatable state;
- a gear cover that is attached to the main body frame by a fixing means to form an internal space sealed off from an outside between the gear cover and the main body frame, and rotatably supports the one end side of the reduction gear member;
- and
- an upper hook that is coupled to the gear side-frame part via a connecting means, for suspending the main body frame from the upper hook,
- the gear-side frame part is provided with a bottom part and an outer peripheral wall part projecting from an outer peripheral edge portion of the bottom part, and
- an upper rib which is unitary with and extends from opposite portions of the outer peripheral wall part with reference to the upper rib is provided at the gear-side frame part on an upper side where the connecting means is provided such that a distance between the upper rib and the drive shaft is shorter than a distance between the outer peripheral wall part and the drive shaft, and the upper rib is provided adjacent to the connecting means;
- wherein a lower rib which is unitary with and extends from opposite portions of the outer peripheral wall part with reference to the lower rib is provided at the gear-side frame part on a lower side in the vertical direction distant from the connecting means in a suspending direction such that a distance between the lower rib and the drive shaft is shorter than a distance between the outer peripheral wall part and the driver shaft, and
- wherein an inner peripheral wall part including the upper rib and the lower rib;
- and the outer peripheral wall part located between the upper rib and the lower rib is provided in an elliptical shape or an oval shape in plan view.
Dependencies are inferred from the claim text.