EP2322464B1 - Elevator hoist device - Google Patents
Elevator hoist device Download PDFInfo
- Publication number
- EP2322464B1 EP2322464B1 EP09805055.2A EP09805055A EP2322464B1 EP 2322464 B1 EP2322464 B1 EP 2322464B1 EP 09805055 A EP09805055 A EP 09805055A EP 2322464 B1 EP2322464 B1 EP 2322464B1
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- EP
- European Patent Office
- Prior art keywords
- bearing
- sheave
- wire rope
- shaft
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
- B66B11/043—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation
- B66B11/0438—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation with a gearless driving, e.g. integrated sheave, drum or winch in the stator or rotor of the cage motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
- B66B11/08—Driving gear ; Details thereof, e.g. seals with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
Definitions
- the present invention relates to an elevator hoist device or apparatus used for moving an elevator car up and down in an elevator, and more specifically to a hoist device or apparatus including a sheave supported by a shaft in a manner of cantilever.
- FIG. 6 shows an elevator hoist apparatus in which a sheave is supported on a shaft in the form of a cantilever.
- the elevator hoist apparatus 101 includes a stator 104 and a rotor 111.
- the stator 104 includes a stator core 103 attached to an internal periphery of a frame 102.
- the rotor 111 includes a rotor core 105 attached to a shaft 106 which is supported rotatably by a first bearing 107 (referred to as a sheave's side bearing hereinafter) and a second bearing 108 (referred to as an anti-sheave's side bearing hereinafter), on first and second brackets 109 and 110 installed in the frame.
- the elevator hoist apparatus further includes a sheave 112 which is mounted on a projecting end portion of the shaft 106 projecting outwards to an outer side of the sheave's side bearing 107.
- the external periphery of the sheave 112 is formed with a wire rope wind-up surface 114 including a plurality of wire rope grooves 113 arranged in a row.
- an overhang dimension or length D of the shaft 106 is expressed by a following equation 1 by using a dimension A from an end of the wire rope wind-up surface 114 toward the sheave's side bearing 107, to a sheave shaft load center (the middle of the wire rope wind-up surface 114), a dimension B from a sheave's side end face of the sheave side bearing 107 to the middle of the sheave side bearing 107, and a distance or spacing C from the sheave's side end face of the sheave's side bearing 107 to the end of the wire rope wind-up surface 114 toward the sheave side bearing 107.
- the shaft receives a bending moment M due to the sheave shaft load W.
- the hoist apparatus requires the use of a thick shaft having a greater shaft diameter, and hence encounters the disadvantage of weight increase and cost increase.
- an existing system employs a hoist apparatus 120 of a dual support structure having a sheave 1 24 between bearings 1 22 and 1 23 supporting a shaft 121, as shown in FIG. 7 .
- this structure supporting the sheave on both sides is disadvantageous in that installation and replacement of the sheave are difficult after the assembly of the hoist apparatus.
- an elevator hoist apparatus comprising a stator including a stator core attached to an internal periphery of a frame, a rotor including a rotor core attached to a shaft supported rotatably by first and second bearings which receive the shaft on an inner race's side and which receive, on an outer race's side, first and second brackets provided in the frame, and a sheave mounted on a projecting end portion of the shaft projecting to an outer side of the first bearing, the first bearing being a sheave's side bearing on a sheave's side of the rotor and the second bearing being an anti-sheave's side bearing on an anti-sheaves side opposite to the sheave's side, the invention of Claim 1 is arranged so that the sheave includes a wire rope wind-up surface which is formed on an external peripheral side of the sheave and which includes a plurality of wire rope grooves arranged in a row, and a bearing insertion portion which is formed on an internal peripheral side of the wire
- an elevator hoist apparatus comprising a stator including a stator core attached to an internal periphery of a frame, a rotor including a rotor core attached to a shaft supported rotatably by first and second bearings which receive the shaft on an inner race's side and receive first and second brackets provided in the frame on an outer race's side, and a sheave mounted on a projecting end portion of the shaft projecting to an outer side of the first bearing, the first bearing being a sheave's side bearing on a sheave's side of the rotor and the second bearing being an anti-sheave's side bearing on an anti-sheaves side opposite to the sheave's side, the invention of Claim 3 is arranged so that the sheave includes a wire rope wind-up surface which is formed on an external peripheral side of the sheave and which includes a plurality of wire rope grooves arranged in a row, and a bearing insertion portion which is formed on an internal peripheral side of the wire rope wind-
- an elevator hoist apparatus comprising a stator including a stator core attached to an internal periphery of a frame, a rotor including a rotor core attached to a shaft supported rotatably by first and second bearings receiving the shaft on an inner race's side and receiving first and second brackets provided in the frame on an outer race's side, and a sheave mounted on a projecting end portion of the shaft projecting to an outer side of the first bearing, the first bearing being a sheave's side bearing on a sheave's side of the rotor and the second bearing being an anti-sheave's side bearing on an anti-sheaves side opposite to the sheave's side, the invention of Claim 5 is arranged so that the sheave includes a wire rope wind-up surface which is formed on an external peripheral side of the sheave and which includes a plurality of wire rope grooves arranged in a row, and a bearing insertion portion which is formed on an internal peripheral side of the wire rope wind-up
- FIG. 1 shows an elevator hoist apparatus or device 1 according to a first embodiment.
- the elevator hoist apparatus 1 includes a stator 4 and a rotor 11.
- the stator 4 is formed by attaching or fixing a stator core 3 to an internal periphery of a frame 2.
- the rotor 11 is formed by supporting a shaft 6 to which a rotor core 5 is attached or fixed, by a first bearing 7 (hereinafter referred to as a sheave's side bearing) and a second bearing 8 (hereinafter referred to as an anti-sheave's side bearing), rotatably on first and second brackets 9 and 10 installed in the frame 2.
- the elevator hoist apparatus 1 further includes a sheave 12 (wheel with a groove for a rope to run on) mounted on a projecting end portion of the shaft 6 which projects to an outer side of the sheave bearing 7.
- the sheave 12 includes a wire rope wind-up surface 14 which is formed in an external periphery of the sheave 12, and which is formed with a plurality of wire rope grooves 13 arranged in a row.
- the sheave 12 includes a bearing insertion portion 1 5 which is formed on an internal peripheral side of the wire rope wind-up surface 14 or radial inner side surrounded by the wire rope wind-up surface 14, and adapted to receive the sheave side bearing 7 inserted into the bearing insertion portion 15.
- the sheave side bearing 7 is inserted in the bearing insertion portion 15.
- the sheave's side bearing 7 is located between the position at which the sheave's side bearing 7 is inserted, and covered, entirely in the bearing insertion portion 15, and the position at which the end face of the sheave's side bearing 7 facing toward the sheave shaft load center is located at the position of the sheave shaft load center.
- This relationship between the position of the sheave's side bearing 7 and the position of the sheave 12 is expressed by a following mathematical expression, 2B ⁇ C ⁇ A.
- the sheave's side bearing 7 By placing the sheave's side bearing 7 within the bearing insertion portion 1 5 as explained above, it is possible to decrease the overhang dimension D, as compared to the hoist apparatus of the earlier technology shown in FIG. 6 .
- the force L1 acting on the sheave's side bearing 7 and the force L2 acting on the anti-sheave side bearing 8 become smaller in magnitude, and hence it becomes possible to reduce the sizes and weights of these bearings, the shaft and the frame, and to reduce the cost.
- the bending moment M due to the sheave shaft load W becomes smaller, too. Accordingly, even in the case of a thinner shaft, it is possible to decrease the deflection of the shaft due to the sheave shaft load W, and to decrease the inclination of the sheave.
- FIG. 2 shows an elevator hoist apparatus 1 according to a second embodiment.
- the sheave's side bearing 7 inserted in the bearing insertion portion 15 is so positioned that the widthwise middle or middle in the widthwise direction, of the sheave's side bearing 7 is located at the sheave shaft load center.
- the second embodiment is the same as the first embodiment, and repetitive explanation is omitted.
- the bending moment M due to the sheave shaft load W is eliminated, so and the shaft undergoes no deflection, and it is possible to eliminate the inclination of the sheave due to deflection of the shaft. In addition, it is possible to make the shaft thinner in size and lighter in weight.
- FIG. 3 shows an elevator hoist apparatus 1 according to a third embodiment.
- the sheave's side bearing 7 is so positioned that the widthwise middle or middle in the widthwise direction of the sheave's side bearing 7 is positioned on the outer side of the sheave shaft load center (on the opposite side of the sheave shaft load center, opposite to the side on which the anti-sheave's side bearing 8 is located).
- This relationship between the position of the sheave's side bearing 7 and the position of the sheave 12 is expressed by a following mathematical expression, 0 ⁇ D.
- the sheave shaft load W is supported between the sheave's side bearing 7 and anti-sheave's side bearing 8. Therefore, this arrangement can restrain the deflection of the shaft, eliminate the inclination of the sheave, and support the sheave in a stable state like the hoist apparatus of the dual support type as shown in FIG. 7 . In addition, this arrangement can maintain the superior usability of the cantilever type hoist apparatus.
- the sheave 12 is fixedly mounted on the end portion of the shaft 6 by shrink fitting.
- the end portion of shaft 6 is inserted into a shaft insertion portion 16 formed in the sheave 12, and fixed to the sheave 12 by nut 17 or bolts 18. These arrangements can facilitate operations such as replacement of the sheave.
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- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Description
- The present invention relates to an elevator hoist device or apparatus used for moving an elevator car up and down in an elevator, and more specifically to a hoist device or apparatus including a sheave supported by a shaft in a manner of cantilever.
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FIG. 6 shows an elevator hoist apparatus in which a sheave is supported on a shaft in the form of a cantilever. Theelevator hoist apparatus 101 includes astator 104 and arotor 111. Thestator 104 includes astator core 103 attached to an internal periphery of aframe 102. Therotor 111 includes arotor core 105 attached to ashaft 106 which is supported rotatably by a first bearing 107 (referred to as a sheave's side bearing hereinafter) and a second bearing 108 (referred to as an anti-sheave's side bearing hereinafter), on first andsecond brackets sheave 112 which is mounted on a projecting end portion of theshaft 106 projecting outwards to an outer side of the sheave's side bearing 107. - The external periphery of the
sheave 112 is formed with a wire rope wind-upsurface 114 including a plurality ofwire rope grooves 113 arranged in a row. (cf.patent document 1, as an example) -
- Patent Document 1:
JP 53-5963 U - Patent Document 2:
EP 1845 051 A1 shows an elevator hoist apparatus including a stator (8), a frame (1d, 1), a rotor (5, 7) mounted on a rotary shaft (3), and a bearing (2 inFIGS. 2 ,4 , 9;2a inFIG. 6 ,7 ) which includes two roller bearings. - Patent Document 3:
US 4,355,785 A relates to a drive apparatus for application such as traction elevator system (cf.column 1,lines 12, 13), and teaches, in a paragraph ofcolumn 2, lines 44-65, that the center line 52 of the working surface of a sheave 42 coincides with the center line of a first bearing assembly 40. - Patent Document 4:
EP 1 657 207 A1 - In the conventional elevator hoist apparatus having the above-mentioned cantilever sheave support structure, an overhang dimension or length D of the
shaft 106 is expressed by a followingequation 1 by using a dimension A from an end of the wire rope wind-upsurface 114 toward the sheave's side bearing 107, to a sheave shaft load center (the middle of the wire rope wind-up surface 114), a dimension B from a sheave's side end face of the sheave side bearing 107 to the middle of the sheave side bearing 107, and a distance or spacing C from the sheave's side end face of the sheave's side bearing 107 to the end of the wire rope wind-upsurface 114 toward the sheave side bearing 107.Following equations - As expressed by the
equations sheave 12 having a great width is required, the dimension A becomes greater, the overhang dimension D becomes greater, and hence the forces L1 and L2 increase. As a result, the hoist apparatus requires the bearings, shaft and frame of greater sizes, resulting in disadvantage of weight increase and cost increase of the hoist apparatus. - Even when the sheave width is increased, it is possible to increase the dimension E in proportion to an increase of the dimension D of
FIG. 6 , and thereby to avoid the need for greater bearings and shaft. However, in this case, the lengths of the frame and shaft are increased by the increase of dimension E. As a result, the overall size and installation space of the hoist apparatus are increased, and the hoist apparatus encounters the problem of weight increase and cost increase. -
- In the case of the sheave having a greater width, the dimension A is greater, and the bending moment M becomes greater, as evident from the
equation 4. Therefore, to solve the problem of inclination of the sheave caused by deflection of the shaft due to the sheave shaft load W, the hoist apparatus requires the use of a thick shaft having a greater shaft diameter, and hence encounters the disadvantage of weight increase and cost increase. - When the sheave width and the sheave load are great, an existing system employs a
hoist apparatus 120 of a dual support structure having asheave 1 24 betweenbearings 1 22 and 1 23 supporting ashaft 121, as shown inFIG. 7 . However, this structure supporting the sheave on both sides is disadvantageous in that installation and replacement of the sheave are difficult after the assembly of the hoist apparatus. - It is an object of the present invention to provide hoist apparatus of a cantilever structure suitable for a greater sheave width and a greater sheave load.
- In an elevator hoist apparatus comprising a stator including a stator core attached to an internal periphery of a frame, a rotor including a rotor core attached to a shaft supported rotatably by first and second bearings which receive the shaft on an inner race's side and which receive, on an outer race's side, first and second brackets provided in the frame, and a sheave mounted on a projecting end portion of the shaft projecting to an outer side of the first bearing, the first bearing being a sheave's side bearing on a sheave's side of the rotor and the second bearing being an anti-sheave's side bearing on an anti-sheaves side opposite to the sheave's side, the invention of
Claim 1 is arranged so that the sheave includes a wire rope wind-up surface which is formed on an external peripheral side of the sheave and which includes a plurality of wire rope grooves arranged in a row, and a bearing insertion portion which is formed on an internal peripheral side of the wire rope wind-up surface and which receives the first bearing inserted in the bearing insertion portion, a widthwise middle of the first bearing inserted in the bearing insertion portion is positioned on an inner side of a sheave shaft load center of the wire rope wind-up surface that is a rotor's side of the sheave shaft load center of the wire rope wind-up surface, and an end face of the first bearing confronting the second bearing is positioned on a sheave shaft load center's side of an end of the wire rope wind-up surface on the rotor's side. - In an elevator hoist apparatus comprising a stator including a stator core attached to an internal periphery of a frame, a rotor including a rotor core attached to a shaft supported rotatably by first and second bearings which receive the shaft on an inner race's side and receive first and second brackets provided in the frame on an outer race's side, and a sheave mounted on a projecting end portion of the shaft projecting to an outer side of the first bearing, the first bearing being a sheave's side bearing on a sheave's side of the rotor and the second bearing being an anti-sheave's side bearing on an anti-sheaves side opposite to the sheave's side, the invention of
Claim 3 is arranged so that the sheave includes a wire rope wind-up surface which is formed on an external peripheral side of the sheave and which includes a plurality of wire rope grooves arranged in a row, and a bearing insertion portion which is formed on an internal peripheral side of the wire rope wind-up surface and which receives the first bearing inserted in the bearing insertion portion, a widthwise middle of the first bearing is positioned at the sheave shaft load center, and an end face of the first bearing confronting the second bearing is positioned on a sheave shaft load center's side of an end of the wire rope wind-up surface on the rotor's side. - In an elevator hoist apparatus comprising a stator including a stator core attached to an internal periphery of a frame, a rotor including a rotor core attached to a shaft supported rotatably by first and second bearings receiving the shaft on an inner race's side and receiving first and second brackets provided in the frame on an outer race's side, and a sheave mounted on a projecting end portion of the shaft projecting to an outer side of the first bearing, the first bearing being a sheave's side bearing on a sheave's side of the rotor and the second bearing being an anti-sheave's side bearing on an anti-sheaves side opposite to the sheave's side, the invention of
Claim 5 is arranged so that the sheave includes a wire rope wind-up surface which is formed on an external peripheral side of the sheave and which includes a plurality of wire rope grooves arranged in a row, and a bearing insertion portion which is formed on an internal peripheral side of the wire rope wind-up surface and which receives the first bearing inserted in the bearing insertion portion, a widthwise middle of the first bearing is positioned on an outer side of the sheave shaft load center that is on an anti-rotor's side of the sheave shaft load center, and an end face of the first bearing confronting the second bearing is positioned on a sheave shaft load center's side of an end of the rope wire wind-up surface on the rotor's side. -
- (1) In the elevator hoist apparatus of
Claim 1, the widthwise middle of the first bearing inserted in the bearing insertion portion is positioned on the inner side of the sheave shaft load center of the wire rope wind-up surface, the inner side being a rotor's side of the sheave shaft load center of the wire rope wind-up surface, and at the same time the end face of the first bearing confronting the second bearing is positioned on the sheave shaft load center's side of the end of the wire rope wind-up surface on the rotor's side so that the end face of the first bearing confronting the second bearing is located between the end of the wire rope wind-up surface on the rotor's side and the sheave shaft load center. Therefore, it is possible to decrease the overhang dimension D, as compared to the hoist apparatus of the earlier technology shown inFIG. 6 . As a result, the force L1 acting on the sheave side bearing 7 and the force L2 acting on the anti-sheave side bearing 8 become smaller in magnitude, and hence it becomes possible to reduce the sizes and weights of these bearings, the shaft and the frame and to reduce the cost. Moreover, the bending moment M due to the sheave shaft load W becomes smaller. Accordingly, even in the case of a thinner shaft, it is possible to decrease the deflection of the shaft due to the sheave shaft load W, and to decrease the inclination of the sheave. - (2) In the elevator hoist apparatus of
Claim 3, the widthwise middle of the sheave side bearing is positioned at the sheave shaft load center. Therefore, it is possible to decrease the overhang dimension D to zero. As a result, the force L1 become equal to the sheave shaft load W, so that it is possible to decrease the radial load applied on the sheave side bearing as compared to the construction ofClaim 1. Furthermore, the force L2 applied on the anti-sheave side bearing becomes equal to zero, so that it is possible to reduce the size of the bearing further as compared to the construction ofClaim 1. Moreover, the bending moment M due to the sheave shaft load W is eliminated, so and the shaft undergoes no deflection, and it is possible to eliminate the inclination of the sheave due to deflection of the shaft. In addition, it is possible to make the shaft thinner in size and lighter in weight. - (3) In the hoist apparatus of
Claim 5, the sheave shaft load W is supported between the first bearing and second bearing. Therefore, this hoist apparatus can restrain the deflection of the shaft, eliminate the inclination of the sheave, and support the sheave in a stable state like the hoist apparatus of the dual support type as shown inFIG. 7 . In addition, this hoist apparatus can maintain the superior usability of the cantilever type hoist apparatus. -
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FIG. 1 A is a sectional view of a hoist apparatus according to a first embodiment.FIG. 1 B is a side view. -
FIG. 2A is a sectional view of a hoist apparatus according to a second embodiment.FIG. 2B is a side view. -
FIG. 3A is a sectional view of a hoist apparatus according to a third embodiment.FIG. 3B is a side view. -
FIG. 4 is a view illustrating a joining method of joining a shaft and a sheave. -
FIG. 5 is a view illustrating a joining method of joining the shaft and the sheave. -
FIG. 6A is a sectional view of a cantilever type hoist apparatus of earlier technology.FIG. 6B is a side view. -
FIG. 7A is a sectional view of a dual support type hoist apparatus of earlier technology.FIG. 7B is a side view. -
FIG. 1 shows an elevator hoist apparatus ordevice 1 according to a first embodiment. The elevator hoistapparatus 1 includes astator 4 and arotor 11. Thestator 4 is formed by attaching or fixing astator core 3 to an internal periphery of aframe 2. Therotor 11 is formed by supporting ashaft 6 to which arotor core 5 is attached or fixed, by a first bearing 7 (hereinafter referred to as a sheave's side bearing) and a second bearing 8 (hereinafter referred to as an anti-sheave's side bearing), rotatably on first andsecond brackets frame 2. The elevator hoistapparatus 1 further includes a sheave 12 (wheel with a groove for a rope to run on) mounted on a projecting end portion of theshaft 6 which projects to an outer side of thesheave bearing 7. - The
sheave 12 includes a wire rope wind-up surface 14 which is formed in an external periphery of thesheave 12, and which is formed with a plurality ofwire rope grooves 13 arranged in a row. - The
sheave 12 includes abearing insertion portion 1 5 which is formed on an internal peripheral side of the wire rope wind-up surface 14 or radial inner side surrounded by the wire rope wind-up surface 14, and adapted to receive the sheave side bearing 7 inserted into thebearing insertion portion 15. Thus, thesheave side bearing 7 is inserted in thebearing insertion portion 15. - In the first embodiment, the sheave's
side bearing 7 is located between the position at which the sheave'sside bearing 7 is inserted, and covered, entirely in thebearing insertion portion 15, and the position at which the end face of the sheave'sside bearing 7 facing toward the sheave shaft load center is located at the position of the sheave shaft load center. This relationship between the position of the sheave'sside bearing 7 and the position of thesheave 12 is expressed by a following mathematical expression, 2B<C<A. - By placing the sheave's
side bearing 7 within the bearinginsertion portion 1 5 as explained above, it is possible to decrease the overhang dimension D, as compared to the hoist apparatus of the earlier technology shown inFIG. 6 . As a result, the force L1 acting on the sheave'sside bearing 7 and the force L2 acting on the anti-sheave side bearing 8 become smaller in magnitude, and hence it becomes possible to reduce the sizes and weights of these bearings, the shaft and the frame, and to reduce the cost. Moreover, the bending moment M due to the sheave shaft load W becomes smaller, too. Accordingly, even in the case of a thinner shaft, it is possible to decrease the deflection of the shaft due to the sheave shaft load W, and to decrease the inclination of the sheave. -
FIG. 2 shows an elevator hoistapparatus 1 according to a second embodiment. In the second embodiment, the sheave'sside bearing 7 inserted in thebearing insertion portion 15 is so positioned that the widthwise middle or middle in the widthwise direction, of the sheave'sside bearing 7 is located at the sheave shaft load center. This relationship between the position of thesheave side bearing 7 and the position of thesheave 12 is expressed by a following mathematical expression, C=A+B. In the other respects, the second embodiment is the same as the first embodiment, and repetitive explanation is omitted. - By positioning the widthwise middle of the sheave side bearing 7 at the sheave shaft load center as explained above, it is possible to decrease the overhang dimension D to zero. As a result, the force L1 become equal, in magnitude, to the sheave shaft load W, so that it is possible to decrease the radial load applied on the sheave's
side bearing 7 as compared to the construction ofClaim 1. Furthermore, the force L2 applied on the anti-sheave's side bearing 8 becomes equal to zero, so that it is possible to reduce the size of the bearing further as compared to the construction ofClaim 1. Moreover, the bending moment M due to the sheave shaft load W is eliminated, so and the shaft undergoes no deflection, and it is possible to eliminate the inclination of the sheave due to deflection of the shaft. In addition, it is possible to make the shaft thinner in size and lighter in weight. -
FIG. 3 shows an elevator hoistapparatus 1 according to a third embodiment. In the third embodiment, the sheave'sside bearing 7 is so positioned that the widthwise middle or middle in the widthwise direction of the sheave'sside bearing 7 is positioned on the outer side of the sheave shaft load center (on the opposite side of the sheave shaft load center, opposite to the side on which the anti-sheave's side bearing 8 is located). This relationship between the position of the sheave'sside bearing 7 and the position of thesheave 12 is expressed by a following mathematical expression, 0<D. - As explained above, the sheave shaft load W is supported between the sheave's
side bearing 7 andanti-sheave's side bearing 8. Therefore, this arrangement can restrain the deflection of the shaft, eliminate the inclination of the sheave, and support the sheave in a stable state like the hoist apparatus of the dual support type as shown inFIG. 7 . In addition, this arrangement can maintain the superior usability of the cantilever type hoist apparatus. - In the examples of the first through third embodiments shown in
FIGS. 1∼3 , thesheave 12 is fixedly mounted on the end portion of theshaft 6 by shrink fitting. However, it is optional to employ arrangements shown inFIGS. 4 and 5 . In these arrangement ofFIGS. 4 and 5 , the end portion ofshaft 6 is inserted into ashaft insertion portion 16 formed in thesheave 12, and fixed to thesheave 12 bynut 17 orbolts 18. These arrangements can facilitate operations such as replacement of the sheave. -
- 1
- elevator hoist apparatus
- 2
- frame
- 3
- stator core
- 4
- stator
- 5
- rotor core
- 6
- shaft
- 7
- first bearing (sheave's side bearing)
- 8
- second bearing (anti-sheave side bearing)
- 9
- first bracket
- 10
- second bracket
- 11
- rotor
- 12
- sheave (wheel for rope)
- 13
- wire rope groove
- 14
- wire rope wind-up surface
- 15
- bearing insertion portion
Claims (5)
- An elevator hoist apparatus comprising a stator (4) including a stator core (3) attached to an internal periphery of a frame (2), a rotor (11) including a rotor core (5) attached to a shaft (6) supported rotatably, by first and second bearings (7, 8) receiving the shaft (6) on an inner race's side, and receiving first and second brackets (9, 10) provided in the frame (2) on an outer race's side, and a sheave (12) mounted on a projecting end portion of the shaft (6) projecting to an outer side of the first bearing (7), the first bearing (7) being a sheave's side bearing on a sheave's side of the rotor (11) and the second bearing (8) being an anti-sheave's side bearing on an anti-sheaves side opposite to the sheave's side,
wherein the sheave (12) includes a wire rope wind-up surface (14) which is formed on an external peripheral side and which includes a plurality of wire rope grooves (13) arranged in a row,
the elevator hoist apparatus characterized in that the sheave (12) further includes a bearing insertion portion (15) which is formed on an internal peripheral side of the wire rope wind-up surface (14) and which receives the first bearing (7) inserted in the bearing insertion portion (15), and
a widthwise middle, in a widthwise direction, of the first bearing (7) inserted in the bearing insertion portion (15) is positioned on an inner side of a sheave shaft load center of the wire rope wind-up surface (14), the inner side being a rotor's side toward the rotor. - The elevator hoist apparatus as claimed in Claim 1, wherein the first bearing (7) is inserted in the bearing insertion portion (15) so that 2B<C<A where A is a distance from a second end of the wire rope wind-up surface (14) to the sheave shaft load center (W) of the wire rope wind-up surface (14), B is a distance between the widthwise middle of the first bearing (7) and a first end of the first bearing (7), and C is a distance from the first end of the first bearing (7) to the second end of the wire rope wind-up surface (14), the first bearing (7) extending axially toward the rotor core (5) of the rotor (11), from the first (right) end of the first bearing (7) to a second (left) end of the first bearing ('7), the wire rope wide-up surface (14) extending axially from a first (right) end of the wire rope wind up surface (14) to the second (left) end of the wire rope wind up surface (14) toward the rotor core (5) of the rotor (11).
- An elevator hoist apparatus comprising a stator (4) including a stator core (3) attached to an internal periphery of a frame (2), a rotor (11) including a rotor core (5) attached to a shaft (6) supported rotatably, by first and second bearings (7, 8) receiving the shaft on an inner race's side and receiving first and second brackets (9, 10) provided in the frame (2) on an outer race's side, and a sheave (12) mounted on a projecting end portion of the shaft projecting to an outer side of the first bearing (7), the first bearing (7) being a sheave's side bearing on a sheave's side of the rotor (11) and the second bearing (8) being an anti-sheave's side bearing on an anti-sheaves side opposite to the sheave's side,
wherein the sheave (12) includes a wire rope wind-up surface (14) which is formed on an external peripheral side and which includes a plurality of wire rope grooves (13) arranged in a row,
the elevator hoist apparatus characterized in that the sheave (12) further includes a bearing insertion portion (15) which is formed on an internal peripheral side of the wire rope wind-up surface (14) and which receives the first bearing (7) inserted in the bearing insertion portion, and
a widthwise middle, in a widthwise direction, of the first bearing (7) inserted in the bearing insertion portion (15) is positioned at the sheave shaft load center. - The elevator hoist apparatus as claimed in Claim 3, wherein the first bearing (7) is inserted in the bearing insertion portion (15) so that C=A+B where A is a distance from a second end of the wire rope wind-up surface (14) to the sheave shaft load center (W) of the wire rope wind-up surface (14), B is a distance between the widthwise middle of the first bearing (7) and a first end of the first bearing (7), and C is a distance from the first end of the first bearing (7) to the second end of the wire rope wind-up surface (14), the first bearing (7) extending axially from the first (right) end of the first bearing (7) to a second (left) end of the first bearing (7) toward the rotor core (5) of the rotor (11), the wire rope wide-up surface (14) extending axially from a first (right) end of the wire rope wind up surface (14) to the second (left) end of the wire rope wind up surface (14), toward the rotor core (5) of the rotor (11).
- An elevator hoist apparatus comprising a stator (4) including a stator core (3) attached to an internal periphery of a frame (2), a rotor (11) including a rotor core (5) attached to a shaft (6) supported rotatably, by first and second bearings (7, 8) receiving the shaft on an inner race's side and receiving first and second brackets (9, 10) provided in the frame (2) on an outer race's side, and a sheave (12) mounted on a projecting end portion of the shaft (6) projecting to an outer side of the first bearing (7), the first bearing (7) being a sheave's side bearing on a sheave's side of the rotor (11) and the second bearing (8) being an anti-sheave's side bearing on an anti-sheaves side opposite to the sheave's side,
wherein the sheave (12) includes a wire rope wind-up surface (14) which is formed on an external peripheral side and which includes a plurality of wire rope grooves (13) arranged in a row,
the elevator hoist apparatus characterized in that the sheave (12) further includes a bearing insertion portion (15) which is formed on an internal peripheral side of the wire rope wind-up surface (14) and which receives the first bearing (7) inserted in the bearing insertion portion, and
a widthwise middle, in a widthwise direction, of the first bearing (7) inserted in the bearing insertion portion is positioned on an outer side of the sheave shaft load center, the outer side being an anti-rotor's side.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008205092A JP5347365B2 (en) | 2008-08-08 | 2008-08-08 | Elevator hoisting device |
PCT/JP2009/064028 WO2010016573A1 (en) | 2008-08-08 | 2009-08-07 | Elevator hoist device |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2322464A1 EP2322464A1 (en) | 2011-05-18 |
EP2322464A4 EP2322464A4 (en) | 2014-12-24 |
EP2322464B1 true EP2322464B1 (en) | 2017-06-21 |
Family
ID=41663786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09805055.2A Active EP2322464B1 (en) | 2008-08-08 | 2009-08-07 | Elevator hoist device |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2322464B1 (en) |
JP (1) | JP5347365B2 (en) |
KR (1) | KR101208904B1 (en) |
CN (1) | CN102112387B (en) |
WO (1) | WO2010016573A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6260024B2 (en) | 2013-11-07 | 2018-01-17 | 株式会社明電舎 | Elevator hoisting machine |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS535963U (en) * | 1976-07-01 | 1978-01-19 | ||
US4355785A (en) * | 1981-02-23 | 1982-10-26 | Westinghouse Electric Corp. | Electrically driven sheave |
JPS62111889A (en) * | 1985-11-11 | 1987-05-22 | 株式会社日立製作所 | Base structure of elevator hoisting machine |
US4679661A (en) * | 1986-02-24 | 1987-07-14 | Otis Elevator Company | Modular gearless elevator drive |
JP2003104666A (en) | 2001-09-28 | 2003-04-09 | Meidensha Corp | Hoisting machine and elevator device |
CN100369798C (en) * | 2003-08-21 | 2008-02-20 | 三菱电机株式会社 | Thin hoist for elevator |
EP1845051B1 (en) * | 2004-12-15 | 2015-03-11 | Mitsubishi Electric Corporation | Hoist for elevator |
-
2008
- 2008-08-08 JP JP2008205092A patent/JP5347365B2/en active Active
-
2009
- 2009-08-07 WO PCT/JP2009/064028 patent/WO2010016573A1/en active Application Filing
- 2009-08-07 EP EP09805055.2A patent/EP2322464B1/en active Active
- 2009-08-07 KR KR1020117005013A patent/KR101208904B1/en active IP Right Grant
- 2009-08-07 CN CN200980130659.6A patent/CN102112387B/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2010016573A1 (en) | 2010-02-11 |
KR20110039486A (en) | 2011-04-18 |
EP2322464A1 (en) | 2011-05-18 |
KR101208904B1 (en) | 2012-12-06 |
CN102112387A (en) | 2011-06-29 |
CN102112387B (en) | 2014-12-03 |
EP2322464A4 (en) | 2014-12-24 |
JP2010037094A (en) | 2010-02-18 |
JP5347365B2 (en) | 2013-11-20 |
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