IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0688289
(2010-01-15)
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등록번호 |
US-8201810
(2012-06-19)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
10 |
초록
▼
A cable-wound drum style hoist with a rotating shaft supported by bearings that has both: (i) some freedom of motion in (at least) one of the bearings; and (ii) a pillow block in the shaft to impart some freedom of motion (beyond freedom to rotate about the central axis) in the shaft itself. By allo
A cable-wound drum style hoist with a rotating shaft supported by bearings that has both: (i) some freedom of motion in (at least) one of the bearings; and (ii) a pillow block in the shaft to impart some freedom of motion (beyond freedom to rotate about the central axis) in the shaft itself. By allowing some freedom of motion both the bearing(s) and the shaft, the hoist can better accommodate for bent shafts and/or slight misalignment of coaxial bearings. Also, a set of preferred connection hardware for mechanically connecting a hoist reducer box to a hoist backbone with preferred degrees of freedom/constraint.
대표청구항
▼
1. A hoist system defining X, Y and Z directions, the system comprising: a frame, a first shaft segment, a first bearing assembly, a first-assembly connection hardware set and a second bearing assembly, wherein: the first bearing assembly is mechanically connected to the frame by the first-assembly
1. A hoist system defining X, Y and Z directions, the system comprising: a frame, a first shaft segment, a first bearing assembly, a first-assembly connection hardware set and a second bearing assembly, wherein: the first bearing assembly is mechanically connected to the frame by the first-assembly connection hardware set;the first bearing assembly comprises a first bearing;the second bearing assembly is rigidly mechanically connected to the frame;the second bearing assembly comprises a second bearing located to be spaced apart from the first bearing;the second bearing is a pillow block bearing;the first bearing and the second bearing are shaped, sized and located to support and constrain the first shaft segment so that the first shaft segment is free to rotate about the Z direction;the first-assembly connection hardware set defines a first constraint point and a second constraint point spaced apart from the first constraint point;the first-assembly connection hardware set is sized, shaped, located and/or connected so that the first bearing assembly has, relative to the frame and with respect to the first constraint point, the following degrees of freedom/constraint: (i) fixed or free in along X; (ii) free in rotation about X; (iii) fixed in along Y; (iv) free in rotation about Y; (v) free in along Z; and (vi) free in rotation about Z; andthe first-assembly connection hardware set is further sized, shaped, located and/or connected so that the first bearing assembly has, relative to the frame and with respect to the second constraint point, the following degrees of freedom/constraint: (i) fixed in along X; (ii) free in rotation about X; (iii) fixed in along Y; (iv) free in rotation about Y; (v) free in along Z; and (vi) free in rotation about Z. 2. The system of claim 1 wherein the first-assembly connection hardware is further structured, located and/or connected so that the first bearing assembly has, relative to the frame and with respect to the first constraint point, the following further degree of freedom/constraint: free in along X. 3. The system of claim 1 wherein the first-assembly connection hardware is further structured, located and/or connected so that the first bearing assembly has, relative to the frame and with respect to the first constraint point, the following further degree of freedom/constraint: fixed in along X. 4. The system of claim 1 wherein the first bearing assembly further comprises a third bearing, wherein: the third bearing is located to be spaced apart from the first bearing so that the first bearing is located between, and at least substantially coaxial with, the second bearing and the third bearing; andthe third bearing is shaped, sized and located to further support and constrain the first shaft segment so that the first shaft segment is free to rotate about the Z direction. 5. The system of claim 4 wherein: the first bearing is a rigid bearing;the first bearing is rigidly mechanically connected to the first bearing assembly;the third bearing is a rigid bearing; andthe third bearing is rigidly mechanically connected to the first bearing assembly. 6. The system of claim 1 further comprising: a second shaft segment and a shaft coupling hardware set, wherein: the shaft coupling hardware set couples the first shaft segment and the second shaft segment so that they rotate together about the Z direction; andthe shaft coupling hardware transmits only radial loads and loads in torsion. 7. The system of claim 6 further comprising: a third bearing assembly, wherein: the third bearing assembly comprises a third bearing;the third bearing is at least substantially coaxial with the first bearing and the second bearing; andthe third bearing is shaped, sized and located to support and constrain the second shaft segment so that the second shaft segment is free to rotate about the Z direction. 8. The system of claim 7 wherein: the third bearing assembly is rigidly mechanically connected to the frame;the third bearing is rigidly mechanically connected to the third bearing assembly; andthe third bearing is a rigid bearing. 9. The system of claim 7 further comprising a drum and a cable, wherein: the drum is rigidly mechanically connected to the second shaft segment so that the drum rotates about Z with the second shaft segment;the drum is located between the third bearing and the second bearing; andthe cable is sized, shaped and located so that rotation of the drum about the Z direction winds and unwinds the cable from the drum. 10. The system of claim 9 further comprising a motor, wherein: the motor is mechanically connected to the first shaft segment so that the motor drives the first shaft segment, the second shaft segment and the drum to rotate about the Z direction; andthe motor is mechanically connected to and supported by the first bearing assembly. 11. The system of claim 10 further comprising a reducer hardware set, wherein: the reducer hardware set is shaped, sized and located to mechanically connected the motor to the first shaft segment so that the motor drives the first shaft segment, the second shaft segment and the drum to rotate about the Z direction; andthe reducer hardware set is mechanically connected to and supported by the first bearing assembly. 12. A hoist system defining X, Y and Z directions, the system comprising: a frame, a first shaft segment, a first bearing assembly, a first-assembly connection hardware set, a second bearing assembly, a second shaft segment and a shaft coupling hardware set, wherein: the first bearing assembly is mechanically connected to the frame by the first-assembly connection hardware set;the first bearing assembly comprises a first bearing;the second bearing assembly is rigidly mechanically connected to the frame;the second bearing assembly comprises a second bearing located to be spaced apart from the first bearing;the second bearing is a pillow block bearing;the first bearing and the second bearing are shaped, sized and located to support and constrain the first shaft segment so that the first shaft segment is free to rotate about the Z direction;the first-assembly connection hardware set defines a first constraint point and a second constraint point spaced apart from the first constraint point;the first-assembly connection hardware set is sized, shaped, located and/or connected so that the first bearing assembly has, relative to the frame and with respect to the first constraint point, the following degrees of freedom/constraint: (i) fixed or free in along X; (ii) free in rotation about X; (iii) fixed in along Y; (iv) free in rotation about Y; (v) free in along Z; and (vi) free in rotation about Z;the first-assembly connection hardware set is further sized, shaped, located and/or connected so that the first bearing assembly has, relative to the frame and with respect to the second constraint point, the following degrees of freedom/constraint: (i) fixed in along X; (ii) free in rotation about X; (iii) fixed in along Y; (iv) free in rotation about Y; (v) free in along Z; and (vi) free in rotation about Z;the shaft coupling hardware set couples the first shaft segment and the second shaft segment so that they rotate together about the Z direction; andthe shaft coupling hardware transmits only radial loads and loads in torsion. 13. The system of claim 12 further comprising: a third bearing assembly, wherein: the third bearing assembly comprises a third bearing;the third bearing is at least substantially coaxial with the first bearing and the second bearing; andthe third bearing is shaped, sized and located to support and constrain the second shaft segment so that the second shaft segment is free to rotate about the Z direction. 14. The system of claim 13 wherein: the third bearing assembly is rigidly mechanically connected to the frame;the third bearing is rigidly mechanically connected to the third bearing assembly; andthe third bearing is a rigid bearing. 15. The system of claim 13 further comprising a drum and a cable, wherein: the drum is rigidly mechanically connected to the second shaft segment so that the drum rotates about Z with the second shaft segment;the drum is located between the third bearing and the second bearing; andthe cable is sized, shaped and located so that rotation of the drum about the Z direction winds and unwinds the cable from the drum. 16. The system of claim 15 further comprising a motor, wherein: the motor is mechanically connected to the first shaft segment so that the motor drives the first shaft segment, the second shaft segment and the drum to rotate about the Z direction; andthe motor is mechanically connected to and supported by the first bearing assembly. 17. The system of claim 16 further comprising a reducer hardware set, wherein: the reducer hardware set is shaped, sized and located to mechanically connected the motor to the first shaft segment so that the motor drives the first shaft segment, the second shaft segment and the drum to rotate about the Z direction; andthe reducer hardware set is mechanically connected to and supported by the first bearing assembly. 18. A hoist system defining X, Y and Z directions, the system comprising: a backbone, a motor, a hoist hardware set, a first shaft segment, a motor-end bearing assembly, a motor-end-assembly connection hardware set and a pillow block bearing assembly, wherein: the hoist hardware set is mechanically connected to an end of the first shaft segment;the motor is rigidly mechanically connected to the motor end bearing assembly;the motor is structured, located and/or connected to drive the first shaft segment to rotate about Z;the motor-end bearing assembly is mechanically connected to the backbone by the motor-end-assembly connection hardware set;the motor-end bearing assembly comprises a first motor-end bearing and a second motor-end bearing;the intermediate bearing assembly is rigidly mechanically connected to the backbone;the intermediate bearing assembly comprises a pillow block bearing located to be spaced apart from, and at least substantially co-axial with, the first motor end-end bearing and the second motor-end bearing;the pillow block bearing, the first motor-end bearing and the second motor-end bearing are shaped, sized and located to support and constrain the first shaft segment so that the first shaft segment is free to rotate about the Z direction;the motor-end-assembly connection hardware set defines a first constraint point and a second constraint point spaced apart from the first constraint point;the motor-end-assembly connection hardware set is sized, shaped, located and/or connected so that the motor-end bearing assembly has, relative to the backbone and with respect to the first constraint point, the following degrees of freedom/constraint: (i) fixed or free in along X; (ii) free in rotation about X; (iii) fixed in along Y; (iv) free in rotation about Y; (v) free in along Z; and (vi) free in rotation about Z; andthe motor-end-assembly connection hardware set is further sized, shaped, located and/or connected so that the first bearing assembly has, relative to the backbone and with respect to the second constraint point, the following degrees of freedom/constraint: (i) fixed in along X; (ii) free in rotation about X; (iii) fixed in along Y; (iv) free in rotation about Y; (v) free in along Z; and (vi) free in rotation about Z. 19. The system of claim 18 wherein the motor-end assembly connection hardware set comprises: a first bushing, a second bushing and a mounting bar, wherein: the first bushing is rigidly mechanically constrained with respect to the backbone;the second bushing is rigidly mechanically constrained with respect to the backbone;the mounting bar defines a first hole and a second hole;the first hole is sized, shaped and located so that the first bushing extends through first hole and the mounting bar is slidable in at least the along-Z direction over the first bushing;the second hole is sized, shaped and located so that the second bushing extends through second hole and the mounting bar is slidable in at least the along-Z direction over the second bushing; andthe mounting bar is rigidly mechanically connected to the motor-end bearing assembly. 20. The system of claim 19 wherein the first hole is in the shape of a slot elongated in the along-X direction. 21. A hoist system defining X, Y and Z directions, the system comprising: a frame, a first shaft segment, a first bearing assembly, a first-assembly connection hardware set and a second bearing assembly, wherein: the first bearing assembly is mechanically connected to the frame by the first-assembly connection hardware set;the first bearing assembly comprises a first bearing;the second bearing assembly is rigidly mechanically connected to the frame;the second bearing assembly comprises a second bearing located to be spaced apart from the first bearing;the second bearing is a pillow block bearing;the first bearing and the second bearing are shaped, sized and located to support and constrain the first shaft segment so that the first shaft segment is free to rotate about the Z direction;the first-assembly connection hardware set defines a first constraint point and a second constraint point spaced apart from the first constraint point;the first-assembly connection hardware set is sized, shaped, located and/or connected so that such that it will transmit, from the first bearing assembly to the frame, forces parallel with the X axis, forces parallel with the Y axis, and moments about the Z axis; andthe first-assembly connection hardware set is further sized, shaped, located and/or connected so that such that it will not transmit forces in the Z direction, moments about the X axis, or moments about the Y axis. 22. A method of hoisting an object, the method comprising the following steps: providing a hoist system defining X, Y and Z directions, the system comprising: a frame, a first shaft segment, a first bearing assembly, a first-assembly connection hardware set and a second bearing assembly, wherein: the first bearing assembly is mechanically connected to the frame by the first-assembly connection hardware set,the first bearing assembly comprises a first bearing,the second bearing assembly is rigidly mechanically connected to the framethe second bearing assembly comprises a second bearing located to be spaced apart from the first bearing,the second bearing is a pillow block bearing,the first bearing and the second bearing are shaped, sized and located to support and constrain the first shaft segment so that the first shaft segment is free to rotate about the Z direction, andthe first-assembly connection hardware set defines a first constraint point and a second constraint point spaced apart from the first constraint point; andhoisting a load so that: (i) the first constraint point is free in rotation about X; (ii) the first constraint point is fixed in along Y; (iii) the first constraint point is free in rotation about Y; (iv) the first constraint point is free in along Z; (v) the first constraint point is free in rotation about Z; (vi) the second constraint point is fixed in along X; (vii) the second constraint point is free in rotation about X; (viii) the second constraint point is fixed in along Y; (ix) the second constraint point is free in rotation about Y; (x) the second constraint point is free in along Z; and (xi) the second constraint point is free in rotation about Z.
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