CA2574392A1 - Elevator gearless traction machine construction - Google Patents
Elevator gearless traction machine construction Download PDFInfo
- Publication number
- CA2574392A1 CA2574392A1 CA 2574392 CA2574392A CA2574392A1 CA 2574392 A1 CA2574392 A1 CA 2574392A1 CA 2574392 CA2574392 CA 2574392 CA 2574392 A CA2574392 A CA 2574392A CA 2574392 A1 CA2574392 A1 CA 2574392A1
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- Canada
- Prior art keywords
- frame member
- connecting rods
- holes
- shoulder
- elevator
- 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.)
- Abandoned
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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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- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
Abstract
A flexible construction for an elevator gearless traction drive machine having a frame that is easily adaptable to traction sheaves of differing widths and diameters while providing the necessary stability for the drive components without an additional structure. The frame is comprised of a pair of frame members joined by a plurality connecting rods.
The connecting rods can be mounted in various positions based on the diameter of the sheave to avoid interference between the drive mount and suspension means. Longer or shorter connecting rods may be used based on the width of the sheave.
The connecting rods can be mounted in various positions based on the diameter of the sheave to avoid interference between the drive mount and suspension means. Longer or shorter connecting rods may be used based on the width of the sheave.
Description
ELEVATOR GEARLESS TRACTION MACHINE CONSTRIICTION
Field of Invention This invention relates to elevator drives, and in particular to a univelsal machine frame construction.
Background of Invention Gearless traction machines are generally driving a wide range of electric traction elevators. Fig. I and Fig. 2 show a typical gearless traction machine constniction existing in the art. A traction sheave 10 is driving a pliu ality of ropes 12 having one eid connected to an elevator car aiid the other cnd connected to a counterweight. '1'he shcave 10 is rigidly mounted on a shafl 14 whicli rotates on bearings 16, 18 mounted in pedestF Is 20, 22. An eJectric motor 24 is generally attached to one oftho pedestals 22 and drives the shaft 14 and the sheave 10. In order for the machine to be rigid, the pedestals 18, 20 arf generally mounted on a massive steel structure 26 called a bedplate. Such prior art ccinstruction is displayed in Japanese patent JY2003201082, among others.
The problem inherent to this design is that the ropes 12 often interf ,-re with the bedplate 26 when the diameter of the sheave 10 clianges. 'C'his interferencts is shown in Fig. 2 as X when the sheave diameter is increased to the value D. The sheave dit,meter can vary because ropes can be ofdiflereiit diameters and the sheave diameter is generally a multiple of the rope diameter (approximately 40 times). Therefore, the construction d;scribed above is not flexible because certain sheave diameters are prohibited or requixe a specific steel structure in order to be implemented. The bedplatc steel structure 26 is generally a massive welded steel assembly, mal:ing this change expensive and undesirable. Aaiother problein is that the dimensioning of the lower stecl structure also needs to be chaiigec to accommodate sheaves of various widths. The width of lhe sheave can vary, depending c-n the number of ropes 12, which can number between 2 and 10 or more, based upon the tot-, 1 elevator ioad being moved.
An alternative construction is described in U.S. Patent No. 4,679,661. This reference discloses a sheave that is "overhung", meaning that it is not supported at ojte end. This construction allows any sheave diameter to be used because the ropes do n.3t interfere with any pait of the supporting st.ructure. Ho rever, this arrangement produces a large bending moment applied on the sheave. Therefore, the niain structurc needs to be -ery massive in order to limit deflectioiis and stresscs, leading to increased cost.
In other prior art en.ibodiments the motor has a so-called "extental rotor"
(EP1411620A1, JP2002274770, DE4233759AI) but the pedestals supporting the inachine are also mounted on a heavy steel structure that eventually inteiferes with the ropes. In addition, a major disadvantage of such external rotor construction is that the sheave diameter is dependent of the motor diaineter, thus reducing the flexibility of the machine.
Summary of Invention The present inve,iition is an improved and versatile elevator machi ie construction allowing maximum flexibility for sheave dianietcrs and sheave width while reducing the overall cost of the machine.
The elevator machinc mount construction comprises a first fra.rne member liaving a first hcaring mounting aperture therein and a first plurality of holes and a second frame member having a second bearing mounting aperture thercin and a second plurality of holes.
The first plurality of holes and the second plurality of holes are oriented r,uch that the holes in the first frame member and the holes in the second frame member are sulistantially aligned in pairs. A pluaality of connecting rods is provided, each having a first end passing through one of the plurality of holes in the first frame member, and a second end pas: ing through the substantially aligned hole in the second fraine member. Fasteners are located on the first end and the second end of each t+f the plurality of connecting rods.
Each of the plurality of connecting rods has a first shoulder and a s-:cond shoulder positioned adjacent to the first and second frame members respectively, to separate the first and second fracne niembers. The ends of each of the plurality of connectir g rods are threaded with a nut threaded onlo each end.
A spacer may be positioned about each of the plurality of the conn.:cting rods adjacent to the outer face of the second frame member and a motor mounted on the connecting rods and separated from the second frame member by the spacer. A shaft, having a sheave, passes tltrough bearings mounted in the apertures in the first and second franie members, with the sheave positioned between the frame members_ A su.spcnsion for an elev<<tor car is mounted on the sheave for raising and lowering the elevator car.
The plurality of connectuig rods may be repositioned into altematis holes in the first and second frame members to accominodate sheaves of various diameter: while preventing interference between the elevator car suspension and the connecting rods.
Additionally, the length of the conneccilig rods may be varied to accommodate sheavcs of -arious widths.
Brief Description of Drawings The foregoing and other aspects of the invention will become mo;-e apparent from the following description of examples embodying the best mode of the invention taken in conjunction with the accompanying drawings which illustrate, by way of example only and not interiding to be limiting, the principles of the invention. In the drawi zgs:
Fig. I schematically shows a typical arrangement of gearless ele~ ator machine constniction existing in the art.
Fig. 2 is a section vicw of a typical arrangement taken at 2-2 in Fig. 1.
Fig. 3.is a perspec.tive view of a machine built according to the p-escnt invention.
Field of Invention This invention relates to elevator drives, and in particular to a univelsal machine frame construction.
Background of Invention Gearless traction machines are generally driving a wide range of electric traction elevators. Fig. I and Fig. 2 show a typical gearless traction machine constniction existing in the art. A traction sheave 10 is driving a pliu ality of ropes 12 having one eid connected to an elevator car aiid the other cnd connected to a counterweight. '1'he shcave 10 is rigidly mounted on a shafl 14 whicli rotates on bearings 16, 18 mounted in pedestF Is 20, 22. An eJectric motor 24 is generally attached to one oftho pedestals 22 and drives the shaft 14 and the sheave 10. In order for the machine to be rigid, the pedestals 18, 20 arf generally mounted on a massive steel structure 26 called a bedplate. Such prior art ccinstruction is displayed in Japanese patent JY2003201082, among others.
The problem inherent to this design is that the ropes 12 often interf ,-re with the bedplate 26 when the diameter of the sheave 10 clianges. 'C'his interferencts is shown in Fig. 2 as X when the sheave diameter is increased to the value D. The sheave dit,meter can vary because ropes can be ofdiflereiit diameters and the sheave diameter is generally a multiple of the rope diameter (approximately 40 times). Therefore, the construction d;scribed above is not flexible because certain sheave diameters are prohibited or requixe a specific steel structure in order to be implemented. The bedplatc steel structure 26 is generally a massive welded steel assembly, mal:ing this change expensive and undesirable. Aaiother problein is that the dimensioning of the lower stecl structure also needs to be chaiigec to accommodate sheaves of various widths. The width of lhe sheave can vary, depending c-n the number of ropes 12, which can number between 2 and 10 or more, based upon the tot-, 1 elevator ioad being moved.
An alternative construction is described in U.S. Patent No. 4,679,661. This reference discloses a sheave that is "overhung", meaning that it is not supported at ojte end. This construction allows any sheave diameter to be used because the ropes do n.3t interfere with any pait of the supporting st.ructure. Ho rever, this arrangement produces a large bending moment applied on the sheave. Therefore, the niain structurc needs to be -ery massive in order to limit deflectioiis and stresscs, leading to increased cost.
In other prior art en.ibodiments the motor has a so-called "extental rotor"
(EP1411620A1, JP2002274770, DE4233759AI) but the pedestals supporting the inachine are also mounted on a heavy steel structure that eventually inteiferes with the ropes. In addition, a major disadvantage of such external rotor construction is that the sheave diameter is dependent of the motor diaineter, thus reducing the flexibility of the machine.
Summary of Invention The present inve,iition is an improved and versatile elevator machi ie construction allowing maximum flexibility for sheave dianietcrs and sheave width while reducing the overall cost of the machine.
The elevator machinc mount construction comprises a first fra.rne member liaving a first hcaring mounting aperture therein and a first plurality of holes and a second frame member having a second bearing mounting aperture thercin and a second plurality of holes.
The first plurality of holes and the second plurality of holes are oriented r,uch that the holes in the first frame member and the holes in the second frame member are sulistantially aligned in pairs. A pluaality of connecting rods is provided, each having a first end passing through one of the plurality of holes in the first frame member, and a second end pas: ing through the substantially aligned hole in the second fraine member. Fasteners are located on the first end and the second end of each t+f the plurality of connecting rods.
Each of the plurality of connecting rods has a first shoulder and a s-:cond shoulder positioned adjacent to the first and second frame members respectively, to separate the first and second fracne niembers. The ends of each of the plurality of connectir g rods are threaded with a nut threaded onlo each end.
A spacer may be positioned about each of the plurality of the conn.:cting rods adjacent to the outer face of the second frame member and a motor mounted on the connecting rods and separated from the second frame member by the spacer. A shaft, having a sheave, passes tltrough bearings mounted in the apertures in the first and second franie members, with the sheave positioned between the frame members_ A su.spcnsion for an elev<<tor car is mounted on the sheave for raising and lowering the elevator car.
The plurality of connectuig rods may be repositioned into altematis holes in the first and second frame members to accominodate sheaves of various diameter: while preventing interference between the elevator car suspension and the connecting rods.
Additionally, the length of the conneccilig rods may be varied to accommodate sheavcs of -arious widths.
Brief Description of Drawings The foregoing and other aspects of the invention will become mo;-e apparent from the following description of examples embodying the best mode of the invention taken in conjunction with the accompanying drawings which illustrate, by way of example only and not interiding to be limiting, the principles of the invention. In the drawi zgs:
Fig. I schematically shows a typical arrangement of gearless ele~ ator machine constniction existing in the art.
Fig. 2 is a section vicw of a typical arrangement taken at 2-2 in Fig. 1.
Fig. 3.is a perspec.tive view of a machine built according to the p-escnt invention.
Fig. 4 is a semi sectional view of the machine illustrated in Fig. 3, shotiving detail.
Fig. 5sliows an end vicw of a machine driving an elevator via a fla: belt and a relatively smaller sheave.
Fig. 6 shows a perspective view of tlie embodiment of Fig. 5.
Fig. 7 shows an end view of a machine driving aii elevator via a flat belt and a relatively larger sheave.
Fig. 8 shows a perspective view of the embodiment of Fig. 7.
Fig. 9 is an enlarged illustration showing in detail the connecting rod assembly.
Detailed Description of Illustrative Embodiments Referring to Fig. 3 and Fig. 4, iwo frame members 100, 102, prefe,ably identical, are connected by a plurality of connecting rods 104. Frtuue members 100, 102 are fabricated from metal such as steel plate of such thickness to provide adequate suppc-rt for the machine, as will be evidcnt to one skilled in the art. A plurality of holes 103 are dr lied, or otherwise machined by means well known i-n the art, in frame members 100, 102 su:h that the holes in frame member 100 substturtially align with the holes in frame member 102.
Provision is also made in frame members 100, 102 for mounting bearings 120, 121 respecl ively to support a sha.tl: 118. Frame members 100, 102 are then mounted to a plate 142 by tncans known in the art. In the preferred cmbodiment, the franie members 100, 102 are mounted to the plate by bolts 146.
In the preferred embodiine.nt shown in Fig. 3 and Fig. 4, four metal connecting rods 104 are used. '1'he same connecting rods also support the stator .112 of the motor 1 10. The motor I 10 has a so-called "frarnelcss" construction, meaning that the sta::or is not mounted in any additional frame or enclosure, as are conventional motors. A sheave 116 is attached to a shaft 118 and rotates within the frame members 100, 102 via standard be arings 120, 121.
The motor's rotor 114 is coiuiected to the shaft 118 and transmits the motor torque. A disk brake 122 is mounted on the froiit end of the machine with a disk brake lin.ng 124. The disk brake lining 124 is a double face lining having a first lining 124a and a second lining 124b.
To affect a braking of the machine, the first lining 124a is applied to the inner surface of the disk 122 and the second lining is applied to the outer surface of frame meniber 100.
Referring to Fig. 9, the spacing between the frame inembers 100, 102 is realized by two shoulders 126,128 of the connecting rods 104. The shoulders 126, 118 are machined onto the connecting rods 104 by increasing the diameter of the connecting rods 104 for a length based on the width of the sheave 116. In an alternative embodimert, a spacer bushing (not shown) may be placed about each connecting rod between frazne mer ibers 100 and 102.
The spacer bushings are cylinders nZachi-iied from steel or other suitable rr aterial having an inside diameter and an outside diameter. The inside diameter of the spacer bushing is larger than the diameter of the connecting rod 104 such that the connecting rod J 04 passes through the inside diameter of the spacer bushing_ The spacer bushings would then be sized to a length to a.ecommodate the width of the sheave 116.
Additional spacers 130 mounted on the connecting rods 104 allovN the coils 113 of tlie stator 112 to have sufrcierit clearance from the innermost face of the rear frame member 102.
Spacers 130 are cylinders machined from steel or other suitable material liaving an inside diaxneter and an outside diameter. The inside diameter of the spacer is 1a-ger than the diameter of the connecting rod 104 such that the connecting rod 104 pass:,s through the inside diameter of the spacer 130. Each eiid of a connecting rod 104 is threaclec: at 131 to aecommodate nuts 132. Finally, nuts 132 are tightened on each end of tL e connecting rods 104 in order to form a rigid assembly.
"f he sheave 116 can be desigiied to drive conventional sisal core i-opes, synthetic ropes or flat belts, among other suspension means, to fulfill modein elevator rcquirements. In order to adapt to this wide variety ofsu5peiision means thc sheave diameter can vary from approximately 4 inches to approximately 21 inches and the sheave width from approximately 1 1/2 inches to approximately 14 inches. Accommodation of such wide va iation of sheave diameters and widths is easily achieved with the present irrvention. By changing the length of the connecting rods 104, and the length of the shaft 118, any sheave width is acceptable.
Additionally, the connecting rods 104 may be positioned at various locatio is by placing the coiuiecting rods in appropriate holes in the frame members 100, 102 so that no interference exists between the ropes (or- other suspension means) and any part of the rr.
achine for any sheave diameter.
In addition to ropes, the present invention may be used witli other suspension means known in the art. For exarnple Fig. 5 through Fig. 8 show a machine built from the teachings of the present invention dri,,ing a flat belt 140.
Fig. 5 and Fig. 7 show two possible locations for positioning connccting rods 104 in the lower portions of frame members 100, 102. In the A position, the corniecting rods 104 are installed in the lower portions of frame members 100, 102 at a distance=
fronl the center line of the shaft 118 such that the ropes, flat belts, or other suspension mez ns pass inside the connecting rods 104. In the B position, the connecting rods 104 are installed in the lower portions of fran-ie memhers 100, 102 are installed at a distance from the center line of the shaft 118 such that the ropes, belts, or other connecting means pass outsid,, the coiulecting rods 104. By adjusting the position of the connecting rods depending on t:ie sheave diameter, interference between the ropes, flat belt or other suspension means and the, machine supporting structure is avoided entirely.
Fig. 5 and Fig. 6 thus show an embodiment of the present invention where connecting ro.ds 104 mounted in the A position arc at a distance from the centerline o:'shaft 118 which is greater than the radius of the sheave 116 so that the flat beit 140 passes in.3ide the connecting rods 104.
In the embodiment shown .in Fig. 7 and Fig. 8 the slicavc diamcter las bccn increascd and the lower connecting rods 104 are mounted in location B to avoid interPerence with the suspension means which could occur if the lower connecting rods were pla,:ed at location A.
In this embodiment, the connecting rods 104 are at a distance from the centerline of shaft 118 that is less than the radius of the sheave 116 so that the flat belt 140 passes outside the connecting rods 104.
Because the oi-ily parts of the tnachule that need to be ehanged are essentially of cylindrical shape and can be machined on a CNC horizontal lathe, it is very easy to adapt the machine to any requirement as opposed to prior art where complicated part:;
need to be changed, for example weldecl steel structures.
IC is also noted that in this invention the overall height of the machir:e lias been reduced by the entire height of the steel bedplate structure used in prior art referred to as "H"
in Fig. I), which is a substantial advantage in the particular but very popular instance of "niachine room less" elevators.
In summary an innovative elevator gearless machine has been descr.bed and has the following advantages over the prior art:
Maximum flexibility: the machi.ne of the present invention can accommodate a large spectrum of sheave diatneters and sheave widtlis with iniiuniuni and inexpensive changes (position of connecting rods, length of connecting rods, shaft length).
Minimum number of parts: compression of motor frame and lower : teel structure compared to that fouud in prior art.
Lower cost: expensivt; parts found in prior art such as cast iron pedestals or massive welded steel stnicttu-es have been replaced by lower cost components (fram ~:s made out of flame cut steel plates, connecting rods).
Various changes can be made to the invention wilhouc departing Frcin the spirit thereof or scope of the fo.llowing claims.
Fig. 5sliows an end vicw of a machine driving an elevator via a fla: belt and a relatively smaller sheave.
Fig. 6 shows a perspective view of tlie embodiment of Fig. 5.
Fig. 7 shows an end view of a machine driving aii elevator via a flat belt and a relatively larger sheave.
Fig. 8 shows a perspective view of the embodiment of Fig. 7.
Fig. 9 is an enlarged illustration showing in detail the connecting rod assembly.
Detailed Description of Illustrative Embodiments Referring to Fig. 3 and Fig. 4, iwo frame members 100, 102, prefe,ably identical, are connected by a plurality of connecting rods 104. Frtuue members 100, 102 are fabricated from metal such as steel plate of such thickness to provide adequate suppc-rt for the machine, as will be evidcnt to one skilled in the art. A plurality of holes 103 are dr lied, or otherwise machined by means well known i-n the art, in frame members 100, 102 su:h that the holes in frame member 100 substturtially align with the holes in frame member 102.
Provision is also made in frame members 100, 102 for mounting bearings 120, 121 respecl ively to support a sha.tl: 118. Frame members 100, 102 are then mounted to a plate 142 by tncans known in the art. In the preferred cmbodiment, the franie members 100, 102 are mounted to the plate by bolts 146.
In the preferred embodiine.nt shown in Fig. 3 and Fig. 4, four metal connecting rods 104 are used. '1'he same connecting rods also support the stator .112 of the motor 1 10. The motor I 10 has a so-called "frarnelcss" construction, meaning that the sta::or is not mounted in any additional frame or enclosure, as are conventional motors. A sheave 116 is attached to a shaft 118 and rotates within the frame members 100, 102 via standard be arings 120, 121.
The motor's rotor 114 is coiuiected to the shaft 118 and transmits the motor torque. A disk brake 122 is mounted on the froiit end of the machine with a disk brake lin.ng 124. The disk brake lining 124 is a double face lining having a first lining 124a and a second lining 124b.
To affect a braking of the machine, the first lining 124a is applied to the inner surface of the disk 122 and the second lining is applied to the outer surface of frame meniber 100.
Referring to Fig. 9, the spacing between the frame inembers 100, 102 is realized by two shoulders 126,128 of the connecting rods 104. The shoulders 126, 118 are machined onto the connecting rods 104 by increasing the diameter of the connecting rods 104 for a length based on the width of the sheave 116. In an alternative embodimert, a spacer bushing (not shown) may be placed about each connecting rod between frazne mer ibers 100 and 102.
The spacer bushings are cylinders nZachi-iied from steel or other suitable rr aterial having an inside diameter and an outside diameter. The inside diameter of the spacer bushing is larger than the diameter of the connecting rod 104 such that the connecting rod J 04 passes through the inside diameter of the spacer bushing_ The spacer bushings would then be sized to a length to a.ecommodate the width of the sheave 116.
Additional spacers 130 mounted on the connecting rods 104 allovN the coils 113 of tlie stator 112 to have sufrcierit clearance from the innermost face of the rear frame member 102.
Spacers 130 are cylinders machined from steel or other suitable material liaving an inside diaxneter and an outside diameter. The inside diameter of the spacer is 1a-ger than the diameter of the connecting rod 104 such that the connecting rod 104 pass:,s through the inside diameter of the spacer 130. Each eiid of a connecting rod 104 is threaclec: at 131 to aecommodate nuts 132. Finally, nuts 132 are tightened on each end of tL e connecting rods 104 in order to form a rigid assembly.
"f he sheave 116 can be desigiied to drive conventional sisal core i-opes, synthetic ropes or flat belts, among other suspension means, to fulfill modein elevator rcquirements. In order to adapt to this wide variety ofsu5peiision means thc sheave diameter can vary from approximately 4 inches to approximately 21 inches and the sheave width from approximately 1 1/2 inches to approximately 14 inches. Accommodation of such wide va iation of sheave diameters and widths is easily achieved with the present irrvention. By changing the length of the connecting rods 104, and the length of the shaft 118, any sheave width is acceptable.
Additionally, the connecting rods 104 may be positioned at various locatio is by placing the coiuiecting rods in appropriate holes in the frame members 100, 102 so that no interference exists between the ropes (or- other suspension means) and any part of the rr.
achine for any sheave diameter.
In addition to ropes, the present invention may be used witli other suspension means known in the art. For exarnple Fig. 5 through Fig. 8 show a machine built from the teachings of the present invention dri,,ing a flat belt 140.
Fig. 5 and Fig. 7 show two possible locations for positioning connccting rods 104 in the lower portions of frame members 100, 102. In the A position, the corniecting rods 104 are installed in the lower portions of frame members 100, 102 at a distance=
fronl the center line of the shaft 118 such that the ropes, flat belts, or other suspension mez ns pass inside the connecting rods 104. In the B position, the connecting rods 104 are installed in the lower portions of fran-ie memhers 100, 102 are installed at a distance from the center line of the shaft 118 such that the ropes, belts, or other connecting means pass outsid,, the coiulecting rods 104. By adjusting the position of the connecting rods depending on t:ie sheave diameter, interference between the ropes, flat belt or other suspension means and the, machine supporting structure is avoided entirely.
Fig. 5 and Fig. 6 thus show an embodiment of the present invention where connecting ro.ds 104 mounted in the A position arc at a distance from the centerline o:'shaft 118 which is greater than the radius of the sheave 116 so that the flat beit 140 passes in.3ide the connecting rods 104.
In the embodiment shown .in Fig. 7 and Fig. 8 the slicavc diamcter las bccn increascd and the lower connecting rods 104 are mounted in location B to avoid interPerence with the suspension means which could occur if the lower connecting rods were pla,:ed at location A.
In this embodiment, the connecting rods 104 are at a distance from the centerline of shaft 118 that is less than the radius of the sheave 116 so that the flat belt 140 passes outside the connecting rods 104.
Because the oi-ily parts of the tnachule that need to be ehanged are essentially of cylindrical shape and can be machined on a CNC horizontal lathe, it is very easy to adapt the machine to any requirement as opposed to prior art where complicated part:;
need to be changed, for example weldecl steel structures.
IC is also noted that in this invention the overall height of the machir:e lias been reduced by the entire height of the steel bedplate structure used in prior art referred to as "H"
in Fig. I), which is a substantial advantage in the particular but very popular instance of "niachine room less" elevators.
In summary an innovative elevator gearless machine has been descr.bed and has the following advantages over the prior art:
Maximum flexibility: the machi.ne of the present invention can accommodate a large spectrum of sheave diatneters and sheave widtlis with iniiuniuni and inexpensive changes (position of connecting rods, length of connecting rods, shaft length).
Minimum number of parts: compression of motor frame and lower : teel structure compared to that fouud in prior art.
Lower cost: expensivt; parts found in prior art such as cast iron pedestals or massive welded steel stnicttu-es have been replaced by lower cost components (fram ~:s made out of flame cut steel plates, connecting rods).
Various changes can be made to the invention wilhouc departing Frcin the spirit thereof or scope of the fo.llowing claims.
Claims (16)
1. An elevator machine mount comprising:
a first frame member having a first bearing mounting aperture therein and a first plurality of holes;
a second frame member having a second bearing mounting aperture therein and a second plurality of holes;
said first plurality of holes and said second plurality of holes being oriented such that the holes in said first frame member and the holes in said second frame member are substantially aligned in pairs;
a plurality of connecting rods, each connecting rod having a first end passing through one of said plurality of holes in said first frame member, and a second end passing through the substantially aligned hole in said second frame member; and fasteners located on said first end and said second end of each of said plurality of connecting rods.
a first frame member having a first bearing mounting aperture therein and a first plurality of holes;
a second frame member having a second bearing mounting aperture therein and a second plurality of holes;
said first plurality of holes and said second plurality of holes being oriented such that the holes in said first frame member and the holes in said second frame member are substantially aligned in pairs;
a plurality of connecting rods, each connecting rod having a first end passing through one of said plurality of holes in said first frame member, and a second end passing through the substantially aligned hole in said second frame member; and fasteners located on said first end and said second end of each of said plurality of connecting rods.
2. The elevator machine mount of claim 1 wherein each of said plurality of connecting rods has a first shoulder adjacent said first frame member; and a second shoulder adjacent said second frame member, said first shoulder and said second shoulder being positioned to separate said first frame member and said second frame member.
3. The elevator machine mount of claim 1 wherein a spacer bushing is positioned about each of said plurality of connecting rods between said first frame member and said second frame member.
4. The elevator machine mount of claim 1 wherein said first and second ends of said connecting rods are threaded, and wherein said fasteners comprise nuts engaged on said ends.
5. The elevator machine mount of claim 1 further including a spacer about each of said plurality of connecting rods adjacent to said second frame member.
6. The elevator machine mount of claim 2 wherein said first and second ends of said connecting rods are threaded, and wherein said fasteners comprise nuts engaged on said ends.
7. The elevator machine mount of claim 2 further including a spacer about each of said plurality of connecting rods adjacent to said second frame member.
8. The elevator machine mount of claim 6 further including a spacer about each of said plurality of connecting rods adjacent to said second frame member.
9. An elevator machine mount comprising:
a first frame member having a first bearing mounting aperture therein, a first plurality of holes, a first inside face, and a first outside face;
a second frame member having a second bearing mounting aperture therein, a second plurality of holes, a second inside face, and a second outside face;
said first plurality of holes and said second plurality of holes being oriented such that the holes in said first frame member and in said second frame member are substantially aligned in pairs;
a plurality of connecting rods, each connecting rod having a first threaded end, a second threaded end, each of said plurality of connecting rods having a first end passing through one of said plurality of holes in said first frame member, and a second end passing through the substantially aligned hole in said second frame member, and a nut threadedly engaged on said first threaded end and said second threaded end of each of said plurality of connecting rods;
a plurality of frame spacers located between said first frame member and said second frame member; and a spacer about cach of said plurality of connecting rods adjacent to said second outside face.
a first frame member having a first bearing mounting aperture therein, a first plurality of holes, a first inside face, and a first outside face;
a second frame member having a second bearing mounting aperture therein, a second plurality of holes, a second inside face, and a second outside face;
said first plurality of holes and said second plurality of holes being oriented such that the holes in said first frame member and in said second frame member are substantially aligned in pairs;
a plurality of connecting rods, each connecting rod having a first threaded end, a second threaded end, each of said plurality of connecting rods having a first end passing through one of said plurality of holes in said first frame member, and a second end passing through the substantially aligned hole in said second frame member, and a nut threadedly engaged on said first threaded end and said second threaded end of each of said plurality of connecting rods;
a plurality of frame spacers located between said first frame member and said second frame member; and a spacer about cach of said plurality of connecting rods adjacent to said second outside face.
10. The elevator machine mount of claim 9 wherein said frame spacers are comprised of:
a first shoulder on each of said plurality of connecting rods;
a second shoulder on each of said plurality of connecting rods;
wherein said first shoulder is adjacent to said first inside face and said second shoulder is adjacent to said second inside face.
a first shoulder on each of said plurality of connecting rods;
a second shoulder on each of said plurality of connecting rods;
wherein said first shoulder is adjacent to said first inside face and said second shoulder is adjacent to said second inside face.
11. The elevator machine mount of claim 9 wherein said frame spacers are comprised of a spacer bushing positioned about each of said plurality of connecting rods between said first frame member and said second frame member.
12. An elevator drive machine comprising:
a first frame member having a first bearing mounting aperture therein and a first plurality of holes;
a second frame member having a second bearing mounting aperture therein and a second plurality of holes;
said first plurality of holes and said second plurality of holes being oriented such that the holes in said first frame member and the holes in said second frame member are substantially aligned in pairs;
a plurality of connecting rods, each connecting rod having a first threaded end, a second threaded end, a first shoulder, a second shoulder, wherein said first shoulder and said second shoulder are positioned on each of said plurality of connecting rods to separate said first frame member and said second frame member, said first shoulder being adjacent to said first inside face, said second shoulder being adjacent to said second inside face, each of said plurality of connecting rods having a first end passing through one of said plurality of holes in said first frame member, and a second end passing through the substantially aligned hole in said second frame member, and a nut threadedly engaged on said first threaded end and said second threaded end of each of said plurality of connecting rods;
a spacer about each of said plurality of connecting rods adjacent to said second outside face;
a shaft having a first end and a second end, passing through and supported by said a first bearing and a second bearing located in said first and second bearing mounting apertures;
a sheave forming part of said shaft;
a brake mounted on said shaft at said first end;
a motor connected to said shaft at said second end; and a suspension for an elevator car mounted on said sheave.
a first frame member having a first bearing mounting aperture therein and a first plurality of holes;
a second frame member having a second bearing mounting aperture therein and a second plurality of holes;
said first plurality of holes and said second plurality of holes being oriented such that the holes in said first frame member and the holes in said second frame member are substantially aligned in pairs;
a plurality of connecting rods, each connecting rod having a first threaded end, a second threaded end, a first shoulder, a second shoulder, wherein said first shoulder and said second shoulder are positioned on each of said plurality of connecting rods to separate said first frame member and said second frame member, said first shoulder being adjacent to said first inside face, said second shoulder being adjacent to said second inside face, each of said plurality of connecting rods having a first end passing through one of said plurality of holes in said first frame member, and a second end passing through the substantially aligned hole in said second frame member, and a nut threadedly engaged on said first threaded end and said second threaded end of each of said plurality of connecting rods;
a spacer about each of said plurality of connecting rods adjacent to said second outside face;
a shaft having a first end and a second end, passing through and supported by said a first bearing and a second bearing located in said first and second bearing mounting apertures;
a sheave forming part of said shaft;
a brake mounted on said shaft at said first end;
a motor connected to said shaft at said second end; and a suspension for an elevator car mounted on said sheave.
13. The elevator drive machine of claim 12 wherein said suspension is one of the group consisting of sisal core ropes, synthetic ropes, steel ropes, and flat belts.
14. An elevator drive machine of claim 13 wherein said brake is a disk brake.
15. An elevator drive machine of claim 13 wherein said brake is a drum brake.
16. An elevator drive machine of claim 14 wherein said motor is of frameless construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2574392 CA2574392A1 (en) | 2007-01-18 | 2007-01-18 | Elevator gearless traction machine construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2574392 CA2574392A1 (en) | 2007-01-18 | 2007-01-18 | Elevator gearless traction machine construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2574392A1 true CA2574392A1 (en) | 2008-07-18 |
Family
ID=39627530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2574392 Abandoned CA2574392A1 (en) | 2007-01-18 | 2007-01-18 | Elevator gearless traction machine construction |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2574392A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115258889A (en) * | 2022-07-15 | 2022-11-01 | 杭州富工电机有限公司 | Base structure of elevator traction machine and welding method |
-
2007
- 2007-01-18 CA CA 2574392 patent/CA2574392A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115258889A (en) * | 2022-07-15 | 2022-11-01 | 杭州富工电机有限公司 | Base structure of elevator traction machine and welding method |
| CN115258889B (en) * | 2022-07-15 | 2023-09-19 | 杭州富工电机有限公司 | Base structure of elevator traction machine and welding method |
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