Lifting gear

A lifting gear, comprising:

• a load-sheave for shifting a sinuate body in a longitudinal direction thereof;
• and
• a rotary body for rotating the load-sheave and extending along a central axis of the load-sheave and driven by a drive;
• a frame for covering the load-sheave and the rotary body, the frame including a hole through which the power connecting portion extends,
• wherein the rotary body includes a power connecting portion that is coaxial with the central axis of the load-sheave and is coupled to the drive, wherein the rotary body is divided into a shaft body inserted into the hole and an interlock body interlocked and movable with the load-sheave, and wherein the shaft body includes, at a first end thereof, a link portion which is connected to the interlock body, and the shaft body also includes, at a second end thereof, a flexible shaft having the power connecting portion, a flexible tube that rotatably houses the flexible shaft, and a bearing sleeve that is connected to one end of the flexible tube and has a bearing sleeve hole having a shape that matches a shape of the flexible shaft and in which the flexible shaft is fitted.

A lifting gear, comprising:

• a load-sheave for shifting a sinuate body in a longitudinal direction thereof;
• and
• a rotary body for rotating the load-sheave and extending along a central axis of the load-sheave and driven by a drive;
• a frame for covering the load-sheave and the rotary body, the frame including a hole through which the power connecting portion extends,
• wherein the rotary body includes a power connecting portion that is coaxial with the central axis of the load-sheave and is coupled to the drive, wherein the rotary body is divided into a shaft body inserted into the hole and an interlock body interlocked and movable with the load-sheave, wherein the shaft body is removable from the hole, and wherein the shaft body includes, at a first end thereof, a link portion which is connected to the interlock body, and the shaft body also includes, at a second end thereof, a flexible shaft having the power connecting portion, a flexible tube that rotatably houses the flexible shaft, and a bearing sleeve that is connected to one end of the flexible tube and has a bearing sleeve hole having a shape that matches a shape of the flexible shaft and in which the flexible shaft is fitted.

A lifting gear, comprising:

• a load-sheave for shifting a sinuate body in a longitudinal direction thereof;
• and
• a rotary body for rotating the load-sheave and driven by a drive,
• wherein the rotary body includes a power connecting portion coupled to the drive,
• a frame for covering the load-sheave and the rotary body,
• the frame including a hole through which the power connecting portion extends,
• the rotary body includes the power connecting portion, and is divided into a shaft body inserted into the hole and an interlock body interlocked and movable with the load-sheave, wherein
• the interlock body includes an interlock body shaft body facing the shaft body along a length direction of the shaft body, a ring body that is threadedly engaged to the interlock body shaft body so as to rotate forwardly and reversely with the interlock body shaft body, and a braking mechanism that transmits forward rotation of the ring body to the interlock body shaft body and applies a braking force to reverse rotation of the interlock body shaft body;
• and wherein a reduction mechanism is installed between the ring body and the shaft body.

A lifting gear, comprising:

• a load-sheave for shifting a sinuate body in a longitudinal direction thereof;
• a shaft body that rotatably penetrates the load-sheave;
• a ring body that is threadedly engaged to one end of the shaft body so as to rotate forwardly or reversely in an interlocked manner with the shaft body when driven by a driving means;
• a braking mechanism that transmits forward rotation of the ring body to the shaft body and applies a braking force to reverse rotation of the shaft body, the braking mechanism being installed on one end of the shaft body;
• a cover body for covering the ring body, the cover body being installed on one end of the shaft body;
• a reduction gear mechanism installed between a second end of the shaft body and the load-sheave;
• a power connecting portion coupled to the driving means, the power connecting portion being disposed inside the cover body;
• a second shaft body that faces the shaft body along a length direction of the shaft body, the second shaft body being installed inside the cover body;
• and
• a planetary reduction mechanism which includes an input gear to which rotation force of the second shaft body is inputted, a planetary gear that revolves around the input gear so as to transmit its revolution force to the ring body and a ring-shaped sun gear that engages the planetary gear, the planetary reduction mechanism being installed inside the cover body.