摘要:
A combination of a drive tumbler (100) track (50) includes a track (50) made of a plurality of connected track shoes (52) and a plurality of driven surfaces. The track (50) wrapped around the drive tumbler (100) so that a plurality of the shoes (52) are in contact with the drive tumbler (100). The drive tumbler (100) has a plurality of drive surfaces (132) and a circumferential rim surface that includes a plurality of shoe contact surfaces (138) that each contact the inside surface of one of the track shoes (52) that are in contact with the tumbler (100). The shoe contact surface (138) has a shape such that a line (103) normal to the tangent (107) of the shoe contact surface (138) does not pass through the axis of rotation of the drive tumbler (100), thereby allowing the shoe contact surfaces on the rim of the drive tumbler (100) to transmit a tractive force to the track (50). A preferred drive tumbler (100) comprises a center hub (110) and a plurality of individual tooth members (130) connected to the center hub (110) by welds.
摘要:
A crawler (14, 16) has a track tensioning system (150). The crawler (14, 16) includes a crawler frame (43) having a bottom; at least one drive tumbler (100) supported on the frame (43); a track (50) made of a plurality of connected track shoes (52) and is wrapped around the drive tumbler (100) so that a plurality of the shoes (52) are in contact with the drive tumbler (100). The track tensioning system (150), mounted to the frame (43), includes a roller (162) engaging the inside surface of the track (50); and a roller positioning structure attached to the frame (43) that can raise the roller (162) relative to the bottom of the frame (43) to thereby increase the tension of the track (150).
摘要:
A mobile lift crane (10) includes a rotating bed (20) rotatably connected to a carbody (12); a boom (22) pivotally mounted on a front portion of the rotating bed (20) and a mast (28) mounted at its first end on the rotating bed (20) and having a second end; and at least one hydraulic cylinder (36) pivotally connected at a first end to the rotating bed (20), so as to be able to raise the second end of the mast (28) from a near horizontal position to a position where the mast is used during crane pick, move and set operations. In a preferred embodiment, at least one arm (38) is pivotally connected to the rotating bed (20) and the hydraulic cylinder (36). The arm (38) and cylinder (36) are connected together such that extension and retraction of cylinder (36) causes the second end of the arm (38) to raise and lower. The arm (38) and cylinder (36) support at least one mast-engaging member (37) positioned such that raising the second end of the arm (38) causes the mast-engaging member (37) to push against and raise the mast (28) when the mast (28) is in a set-up state.
摘要:
A control console (16) includes a body (22) supporting a plurality of controls (29), a base (30), and first and second legs (50) each having a first end pivotably connected to the body and a second end pivotably connected to the base. The legs (50) are shiftable between a first position projecting over a first end of the base (30), a second position projecting over a second end of the base (30) and a third position between the first and second positions. At least one spring (82) is provided to bias the legs toward the third position, and a motor may included for shifting the legs.
摘要:
A mobile lift crane (10) includes a carbody (12) having moveable ground engaging members (14, 16); a rotating bed (20) rotatably connected to the carbody (12) such that the rotating bed (20) can swing with respect to the ground engaging members (14, 16) ; a boom (22) pivotally mounted on a front portion of the rotating bed (20) ; a mast (28) mounted at its first end on the rotating bed (20) ; a backhitch (30) connected between the mast (28) and a rear portion of the rotating bed (20) ; a moveable counterweight unit; at least one hydraulic cylinder (38) ; and at least one arm (36) pivotally connected at a first end to the rotating bed (20) and at a second end to the hydraulic cylinder (38) . The arm (36) and hydraulic cylinder (38) are connected between the rotating bed (20) and the counterweight unit such that extension and retraction of the hydraulic cylinder (38) changes the position of the counterweight unit compared to the rotating bed (20). In one method of operation, the counterweight is positioned forward of a point directly below the top of the mast (28) when no load is on a load hoist line suspended from the boom (22); and positioned reward of the top of the mast (28) when the hoist line supports a load; and the moveable counterweight is never supported by the ground during crane pick, move and set operations other than indirectly by the ground engaging members (14, 16) on the carbody (20) . In another method the crane (10) is used to perform a pick, move and set operation with a load wherein the moveable counterweight is moved toward and away from the front portion of the rotating bed (20) by extending and retracting the hydraulic cylinder (38) during the pick, move and set operation to help counterbalance the load, but the counterweight is never supported by the ground other than indirectly by the ground engaging members (14, 16) on the carbody (20).
摘要:
A crane (10) having an upper works (12) rotatably mounted on a lower works (16) and a boom (26) pivotally mounted on the upper works (12) preferably includes a hydraulic boom hoist cylinder (34), a hydraulic circuit for controlling the hydraulic boom hoist cylinder (34), a multiple position wire rope guide (50), a counter weight positioning mechanism (110, 112, 114), and a boom parking device. The crane (10) comprises a mast (36) and a hydraulic cylinder pivotally connected to the upper works (12). The connection of the mast (36) to the upper works (12) is at a location separate from, and at an elevation below, the elevation of the connection of the hydraulic cylinder (34) to the upper works (12). The hydraulic cylinder (34) is pivotally connected to the mast and pendently connected to the boom (26). The crane (10) also comprises an apparatus and method for lifting, positioning, and assembling a counter weight (62) to the upper works (12). The apparatus and method includes pivotally connecting a counter weight pivot frame between the counter weight (62) and the upper works (12) and lifting the counter weight (62) into position with the hydraulic boom hoist cylinder (34). The crane (10) also comprises a multiple position wire rope guide (50) and a method of repositioning the wire rope guide (50) during assembly of the crane (10). The crane (10) further comprises a boom parking device.
摘要:
A crawler vehicle having a lower works (16) comprising a carbody (20) and a pair of crawler assemblies (22). Each of the crawler assemblies (22) are removably connected to the carbody (20) by a plurality of carbody to crawler connections (32). The carbody to crawler connections (32) each comprise at least one keyway (96) for aligning the connection components of the crawler assembly (22) with the connection components of the carbody (20), and for preventing these connection components from becoming misaligned in response to eccentric forces or deflections generated between the carbody (20) and each of the crawler assemblies (22).
摘要:
A crawler crane (10) having identical left and right crawler assemblies (24,25). The left and right crawler assemblies each comprise an identical crawler drive assembly to power the individual crawlers. Each crawler drive assembly (90,91) comprises a hydraulic drive motor (92) connected to the crawler. Both crawler drive assemblies utilize identical mounting configurations for connecting the hydraulic drive motor to the frame of the crawler.