CA2217299A1 - Compact drive for lifts - Google Patents
Compact drive for lifts Download PDFInfo
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- CA2217299A1 CA2217299A1 CA 2217299 CA2217299A CA2217299A1 CA 2217299 A1 CA2217299 A1 CA 2217299A1 CA 2217299 CA2217299 CA 2217299 CA 2217299 A CA2217299 A CA 2217299A CA 2217299 A1 CA2217299 A1 CA 2217299A1
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Abstract
The present invention relates to a compact drive for lifts, consisting of motor, reduction gear (15, 16) and brake (5). The compact mode of construction is realised by the incorporation of the motor and the gear (15) into the cylindrical cavity of the bell-shaped drive pulley (1). The motor is a normal polyphase cage rotor motor (8, 9, 10, 11, 12, 3). A
parallel pin transmission finds use as reduction gear (15). Different brake systems and mountings can be attached to the circularly annular surface (43) of the motor housing rear wall (4).
parallel pin transmission finds use as reduction gear (15). Different brake systems and mountings can be attached to the circularly annular surface (43) of the motor housing rear wall (4).
Description
Compact Drive for Lifts Description The present invention relates to a compact drive for lifts, consisting of motor, brake, mounting part, transmission and drive pulley.
Classic lift drives have a serial arrangement of drive components, in which the drive pulley, trans")ission, brake and motor are arranged one after the other and provided with 10 a pedestal, which in tum is frequently screw-connected to a base plate. However, the large space requirement needed by this arrangement restricts the layout possibiliUes and is directly and indirectly connected with higher costs.
There are lift drives known which enables a reduction in volume by nesting of drive 15 co",ponents into one another. For that purpose cavities which are still present are utilised and parts of the drive system are incorporated in these. Such a cavity is present in the drive pulley or can be created by appropriate construction of the drive pulley.
An example of the aforesaid kind is disclosed by DE 42 33759. A transmission-free iifting 20 drive with reduced constructional volume comprises a common housing for an extemal rotor motor and an intemal shoe brake, wherein the housing is constructed as a drive pulley at the same time.
A further example for reduced construcUonal volume for a lift drive is ~isrlosed by US No.
25 5010 981. Here, a planetary gear is a"dnged within a drive pulley mounted at both sides.
A brake and the motor are flange-mounted outside the drive pulley and the bearing blocks at both sides.
The two afor~said examples from the state of the art show, by nested arrangements of 30 drive co",ponents, basic possibiiities of solution for reduction in the volume of a lift drive.
However, with respect to an optimum, co",pa..l lift drive and conto""il~ thereof with spec,iticalions, some desires still remain unfulfilled.
Here the present invention will now indicate a new soluUon to the task of creaUng a lift drive which has a short constnucUonal shape with a higher degree of integraUon, is freely available with respect to installation location and fulfills all safety requirements for lift drives.
This task is solved by the invention characterised in claim 1 and illustrated by way of 5 example in the description and drawing.
The invenbon is distinguished inter alia in that a reducbon gear and a motor are arranged on a common axis within the cylindrical part of a bell-shaped drive pulley.
10 Advantageous developments and improvements are expressed in the subclaims.
A brake, which is preferably elecbromagnebcally releas~hle, with a manual releasing lever as well as a handwheel which is fixed or can be plugged on are arranged at the rear wall of the motor housing.
The motor is a polyphase cage rotor motor, the rotor of which has the cage winding and the stator of which has the polyphase winding.
The motor can also be executed as a synchronous motor, in which case the rotor is 20 equipped with permanent magnets.
A two-layer, parallel pin transmission, the two contact positions of which are arranged ~isplaced relabve to one another by 180(, is provided as the transmission.
25 The radially directed load on the drive pulley is mainly carried by a single heavy-duty bearing in cross-roller construction.
The motor shaft can oplionally be extended and have a second shaft end at the drive pulley end face for the plugging on of a handwheel or the allac~""ent of an accessory 30 insb~ument, for example a tachometer.
A free circularly annular surface at the housing rear wall enables universal mounting variants by al-plicalion of mounbng holes.
The housing rear wall is executed to project beyond the motor housing to at least one side and is constructed as an integrated mounting fitting.
The cooling of the motor is ensured by cooling openings present in the free circularly 5 annular surface, wherein in the case of need an additional cooling blower is built on.
The invention is more closely explained in the following by reference to examples of embodiment and is illustrated in the drawings, in which:
10 Fig. 1 shows an overall view of the drive, with partial section, Fig. 2 shows an overall cross-section through the drive, Fig. 3 shows a aoss-section in the plane A-A, Fig. 4 shows a lift drive with a built-on shoe brake with handwheel, Fig. 5 shows a lift drive with a built-on shoe brake, and 20 Fig. 6 shows a view of the lift drive from the brake side.
The extemally visible parts of a lift drive, primarily a bell-shaped drive pulley 1 with cable grooves 2, are in Fig. 1. The drive pulley 1 has the same diameter as the stationary motor housing 3, which adjoins by way of a small gap and is closed by a motor housing rear wall 25 4. A brake 5, preferably as a known spring pressure brake with electromagnetic aotu~tion~ projects from the motor housing rear wall to the right and is arranged concentrically with the drive axis 41. The brake 5 can be manually opened by a manual release lever 13. The end of a shaft 25, which is concenlnc with the drive axis 41, projects from the centre of the brake 5 to the right to such an extent that a handwheel 5 30 can be ,~'ugged on at this shaft end. The shaft 25 can optionally be ~xealted to penetrate the entire drive, so that a second shaft end 42 projects from the centre of the drive pulley 1 and can serve for the plugging on of the handwheel 6 on the drive pulley side or for the attachment of an accessory instrument, for example a tacho",eter.
The essential parts, which initially are explained only briefly, of the lift drive are visible in the partial section of Fig. 1. Further details can be inferred from the subsequent description relating to Fig. 2 and Fig. 3.
5 The drive pulley 1 is connected by fastening screws 30 with a drive take-off hub 19, which is in tum operatively connected by way of coupling pins 14 with a reduction gear 15. The trdns,nission housing 16 together with a lra,1s",ission front cover 18 fomms the front closure, at the left side, of the motor housing 3. The transmission housing 16 is closed at the right by a transmission rear wall 17. The drive pulley 1 together with the drive take-off 10 hub 19 is rotatably mounted in the transmission housing 16 by means of a drive pulley bearing 7, wherein the drive pulley bearing 7 is constructed in its function as a heavy duty bearing, for example as a cross-roller bearing. The motor consists of a rotor body 8, which partly encloses the transmission housing 16 and which carries the rotor lamination stack 9 with the cage winding 10. The stator, consisting of stator lamination stack 12 and 15 stator winding 11, is arranged at the inner wall of the motor housing 3 radially opposite to therotor8,9,10.
In Fig. 2, details of the lift drive are visible in section and the inte"elaLionships and functions are recognisable. The parts present in this drive can be functionally divided into 20 the following categories:
- slalionary parts - parts rotating at motor rolalional speed - trans",ission parts 25 - parts rotating at reduced rolalional speed.
The ~ldlionary parts are the already-~enlioned motor housing rear wall 4, the motor housing 3, the lransmission housing 16, the trans",ission housing rear wall 17 and the ~dhs",ission front cover 18.
The parts rotating at motor ,olalional speed are a hub 44 which is fastened on the motor shaft 25 at the right and carries the rotor body 8 with the rotor lamination stack 9 and the rotorcagewinding 10.
Counting as transmission parts is the motor shaft 25 or a first eccentric 28 and a second eccenl.ic 29, which are formed on the said motor shaft 25 between a first shaft bearing 26 and a second shaft bearing 27 and are displaced relative to one another by 180(. The two eccentrics 28 and 29 carry a first roller bearing 31 on the first eccentric 28 and a 5 second roller bearing 32 on the second eccentric 29. A first planet wheel 22 and a second planet wheel 23 are each in mesh by a respective toothing 34 with an intemal toothing 21 in the transmission housing 16 by way of the eccentrics 28, 29 and the roller bearings 31, 32. The planet wheel toothing 34 has a smaller tooth number than the intemal toothing 21 in the transmission housing 16.
The planet wheels 22, 23 shown in Fig. 3 have circularly arranged coupling bores 33 (Fig.
Classic lift drives have a serial arrangement of drive components, in which the drive pulley, trans")ission, brake and motor are arranged one after the other and provided with 10 a pedestal, which in tum is frequently screw-connected to a base plate. However, the large space requirement needed by this arrangement restricts the layout possibiliUes and is directly and indirectly connected with higher costs.
There are lift drives known which enables a reduction in volume by nesting of drive 15 co",ponents into one another. For that purpose cavities which are still present are utilised and parts of the drive system are incorporated in these. Such a cavity is present in the drive pulley or can be created by appropriate construction of the drive pulley.
An example of the aforesaid kind is disclosed by DE 42 33759. A transmission-free iifting 20 drive with reduced constructional volume comprises a common housing for an extemal rotor motor and an intemal shoe brake, wherein the housing is constructed as a drive pulley at the same time.
A further example for reduced construcUonal volume for a lift drive is ~isrlosed by US No.
25 5010 981. Here, a planetary gear is a"dnged within a drive pulley mounted at both sides.
A brake and the motor are flange-mounted outside the drive pulley and the bearing blocks at both sides.
The two afor~said examples from the state of the art show, by nested arrangements of 30 drive co",ponents, basic possibiiities of solution for reduction in the volume of a lift drive.
However, with respect to an optimum, co",pa..l lift drive and conto""il~ thereof with spec,iticalions, some desires still remain unfulfilled.
Here the present invention will now indicate a new soluUon to the task of creaUng a lift drive which has a short constnucUonal shape with a higher degree of integraUon, is freely available with respect to installation location and fulfills all safety requirements for lift drives.
This task is solved by the invention characterised in claim 1 and illustrated by way of 5 example in the description and drawing.
The invenbon is distinguished inter alia in that a reducbon gear and a motor are arranged on a common axis within the cylindrical part of a bell-shaped drive pulley.
10 Advantageous developments and improvements are expressed in the subclaims.
A brake, which is preferably elecbromagnebcally releas~hle, with a manual releasing lever as well as a handwheel which is fixed or can be plugged on are arranged at the rear wall of the motor housing.
The motor is a polyphase cage rotor motor, the rotor of which has the cage winding and the stator of which has the polyphase winding.
The motor can also be executed as a synchronous motor, in which case the rotor is 20 equipped with permanent magnets.
A two-layer, parallel pin transmission, the two contact positions of which are arranged ~isplaced relabve to one another by 180(, is provided as the transmission.
25 The radially directed load on the drive pulley is mainly carried by a single heavy-duty bearing in cross-roller construction.
The motor shaft can oplionally be extended and have a second shaft end at the drive pulley end face for the plugging on of a handwheel or the allac~""ent of an accessory 30 insb~ument, for example a tachometer.
A free circularly annular surface at the housing rear wall enables universal mounting variants by al-plicalion of mounbng holes.
The housing rear wall is executed to project beyond the motor housing to at least one side and is constructed as an integrated mounting fitting.
The cooling of the motor is ensured by cooling openings present in the free circularly 5 annular surface, wherein in the case of need an additional cooling blower is built on.
The invention is more closely explained in the following by reference to examples of embodiment and is illustrated in the drawings, in which:
10 Fig. 1 shows an overall view of the drive, with partial section, Fig. 2 shows an overall cross-section through the drive, Fig. 3 shows a aoss-section in the plane A-A, Fig. 4 shows a lift drive with a built-on shoe brake with handwheel, Fig. 5 shows a lift drive with a built-on shoe brake, and 20 Fig. 6 shows a view of the lift drive from the brake side.
The extemally visible parts of a lift drive, primarily a bell-shaped drive pulley 1 with cable grooves 2, are in Fig. 1. The drive pulley 1 has the same diameter as the stationary motor housing 3, which adjoins by way of a small gap and is closed by a motor housing rear wall 25 4. A brake 5, preferably as a known spring pressure brake with electromagnetic aotu~tion~ projects from the motor housing rear wall to the right and is arranged concentrically with the drive axis 41. The brake 5 can be manually opened by a manual release lever 13. The end of a shaft 25, which is concenlnc with the drive axis 41, projects from the centre of the brake 5 to the right to such an extent that a handwheel 5 30 can be ,~'ugged on at this shaft end. The shaft 25 can optionally be ~xealted to penetrate the entire drive, so that a second shaft end 42 projects from the centre of the drive pulley 1 and can serve for the plugging on of the handwheel 6 on the drive pulley side or for the attachment of an accessory instrument, for example a tacho",eter.
The essential parts, which initially are explained only briefly, of the lift drive are visible in the partial section of Fig. 1. Further details can be inferred from the subsequent description relating to Fig. 2 and Fig. 3.
5 The drive pulley 1 is connected by fastening screws 30 with a drive take-off hub 19, which is in tum operatively connected by way of coupling pins 14 with a reduction gear 15. The trdns,nission housing 16 together with a lra,1s",ission front cover 18 fomms the front closure, at the left side, of the motor housing 3. The transmission housing 16 is closed at the right by a transmission rear wall 17. The drive pulley 1 together with the drive take-off 10 hub 19 is rotatably mounted in the transmission housing 16 by means of a drive pulley bearing 7, wherein the drive pulley bearing 7 is constructed in its function as a heavy duty bearing, for example as a cross-roller bearing. The motor consists of a rotor body 8, which partly encloses the transmission housing 16 and which carries the rotor lamination stack 9 with the cage winding 10. The stator, consisting of stator lamination stack 12 and 15 stator winding 11, is arranged at the inner wall of the motor housing 3 radially opposite to therotor8,9,10.
In Fig. 2, details of the lift drive are visible in section and the inte"elaLionships and functions are recognisable. The parts present in this drive can be functionally divided into 20 the following categories:
- slalionary parts - parts rotating at motor rolalional speed - trans",ission parts 25 - parts rotating at reduced rolalional speed.
The ~ldlionary parts are the already-~enlioned motor housing rear wall 4, the motor housing 3, the lransmission housing 16, the trans",ission housing rear wall 17 and the ~dhs",ission front cover 18.
The parts rotating at motor ,olalional speed are a hub 44 which is fastened on the motor shaft 25 at the right and carries the rotor body 8 with the rotor lamination stack 9 and the rotorcagewinding 10.
Counting as transmission parts is the motor shaft 25 or a first eccentric 28 and a second eccenl.ic 29, which are formed on the said motor shaft 25 between a first shaft bearing 26 and a second shaft bearing 27 and are displaced relative to one another by 180(. The two eccentrics 28 and 29 carry a first roller bearing 31 on the first eccentric 28 and a 5 second roller bearing 32 on the second eccentric 29. A first planet wheel 22 and a second planet wheel 23 are each in mesh by a respective toothing 34 with an intemal toothing 21 in the transmission housing 16 by way of the eccentrics 28, 29 and the roller bearings 31, 32. The planet wheel toothing 34 has a smaller tooth number than the intemal toothing 21 in the transmission housing 16.
The planet wheels 22, 23 shown in Fig. 3 have circularly arranged coupling bores 33 (Fig.
2), in which coupling pins 14 provided with support rollers 24 engage. These coupling pins 14 togetherwith the support rollers 24 penetrate the coupling bores 33 of both planet wheels 22 and 23. The coupling pins 14 are entrained by the rotating planet wheels 22, 15 23 by way of the coupling bores 33 thereof and the support rollers 24 and fomm the mechanical drive take-off of the reduction gear 15. They are in this function directly, or by way of the drive take-off hub 19, connected with the drive pulley 1. The diameters of the coupling bores 33 in the planet wheels 22, 23 are greater than that of the support rollers 24 by twice the amount of eccentricity of the eccentrics 28, 29, so that the reducbon gear 15 runs without jamming, but also without unnecessary play.
The reduced rotational speed of the coupling pins 14, the coupling hub 19 and the drive pulley 1 results from the tooth number dirrerence between the planet wheels 22, 23 and the intemal toothing 21 in the transmission housing 16, wherein the tooth number of the planet wheel toothing 34 is smaller than that of the intemal toothing 21 in the transmission housing 16. The l,dnslaLion ratio is c~lG~ ted from the tooth number of the intemal toothing 21 divided by the tooth number difference. The planet wheels 22 and 23 themselves rotate on a rotation of the motor shaft by the tooth number difference in opposite r~talional direction and, together with them, obviously also the coupling pins 14 with the support rollers 24, the drive take-off hub 19 and the drive pulley 1. A very large l,dnsldlion ratio can be produced in a small space by this kind of trans",ission. The two-layer execution of the ll ans" ,ission 15 leads to the fo" "a~on of two points of action, which are ~lispl~ced by 180(, of the drive take-off forces on the intemal toothing 21 in the transmission housing 16 and thus to a load distnbution which is favourable for operation and service life.
The principal load for the lift parts, which are to be supported and moved, in the shaft (cage, counterweight, cables) is carried by the drive pulley bearing 7, wherein apart from the radial and axial forces also tipping moments are taken up. The drive pulley bearing 7, 5 which is constructed as a heavy-duty bearing, comprises cruciro,l,lly arranged and obliquely set rollers, whereby not only radial loadings, but also quite considerable axial loadings, are possible in both directions.
The reduction gear 15 is disposed enbrely and the motor substantially within the bell-10 shaped drive pulley 1. In the shown example (Fig. 1), only a small part of the polyphasewinding 11 projects, by the righthand winding end, somewhat beyond the silhouette of the drive pulley 1. According to the respective dimensioning of the stator winding, this can lie entirely within the drive pulley silhouette. If a synchronous motor is executed instead of a polyphase motor, the rotor is equipped with permanent magnets and the stator is 15 constnucted with salient poles and pole windings.
A further compact mode of consbuction of the lift drive according to the invention yields the building on of a drum brake according to Fig. 4. In that case, a brake drum 37 with a handwheel flange 18 is arranged on the shaft end at the outer side. The brake fitting itself 20 consisls of the brake lever bearings 35, which are fastened at both sides of the brake drum 37 to the motor rear wall 4 and which each carry a brake lever 36 with a brake shoe 39. The two brake levers 36 are actuated by an actuator 40 against spring force. An electromagnet is preferably used as drive of the actuator 40.
25 Fig. 5 shows a disc brake, which is combined with the lift drive, as a third variant relaUng to brake build-up. Fastened on the motor shaft 25 is a brake disc 46, which is engaged around from above by an actuator 40 in the fomm of a brake sUrrup. The schemaUc representation of the actuator 40 is to leave open the possibility of actuating this el~c~,u,,,agneUcally or by hydraulic oil. In both forms of actl~tion, the braking ,.,o,nenl is 30 generated by a static spring force. The actuaUng device serves for the opening movement against this spring force. This mode of brake construction is also equipped with the manual release lever 13.
Fig. 6 shows the explained free circular annular surface 43, amongst other things for the 35 mounUng of the lift drive, at the motor housing rear wall 4. Mounting bores 49, which according to the respective form of fastening technique can have a thread, are present for the fastening of a mounting fitting, which is not illustrated. The number and arrangement of these mounting bores 49 depend on the existing constructional and other conditions of the lift installation. Flat, angled or specially shaped metal profile members, which are not 5 illustrated, with integrated vibration damping come into use as mounting fittings, according to the respective place and mode of installation. Moreover, ventilation openings 48 for air circulation for motor and transmission cooling, in the form of large bores in the example, are present in the circularly annular surface 43. The shape, number and arrangement of the ventilation openings 48 depend on the required cooling air quantity, which in tum 10 depends on the motor dissipation loss, the transmission efficiency and the ambient temperature. The possibility is also given of realising a forced independent air cooling through attachment of a blower. The motor housing rear wall 4 can itself be directly executed as a mounting fitting, wherein the motor housing rear wall 4 then projects beyond the motor housing 3 to at least one side, has mounting holes in the projecting part 15 and, according to the respective installation location and mode of installalion, has apprup, iately shaped end parts.
In the layout of this lift drive, apart from the compact mode of constnuction great value was placed on the ease of operation in the case of an evacuation of trapped passengers in a 20 stuck lift. Independently of the place of installation and the mode of installation the brake can, regardless of which type, be actuated from both sides - as seen in axial direction - by means of the manual release lever 13, thus in one instance directly from the brake side and in the other instance by way of the drive pulley. If the manually actuated brake opening is possible only from the drive pulley side, then, as already explained, a shaft end 25 42, which is at the side of the drive pulley, is provided for the temporary attachment of the handwheel 6.
The illustrated embodiment of the lift drive according to the invention is for a conveying load of 2,000 kilograms and a travel speed of up to 2.5 metres per second. For lower 30 conveying ~p~cilies the drive can be executed to be correspondingly lighter and smal!er, for example with less cable grooves, smaller diameter or shorter constructional length in axial direction.
The fact that the drive preferably comprises a normal polyphase squirrel-cage armature motor allows the use of a usual frequency and amplitude regulating electronic system for current supply and for regulation.
5 If a synchronous motor is to be realised, the current supply and control electronic system needed for this purpose is used analogously.
For smaller trans",ission ratios, moreover, the use of a planetary gear, which is preferably single stage, is also conceivable. The intemal toothing 21 in the ~cnsr"ission housing 16 10 would in principle remain the same, but there would be a sun wheel mounted on the motor shaft 25 instead of the ecce"~ics 28 and 29 and the coupling pins 14 would at the same time be axles of planet wheels.
Lift Drive Reference Symbol List 5 1 drivepulley 2 cable grooves 3 motor housing 4 motor housing rear wall 5 brake 10 6 handwheel 7 drive pulley bearing 8 rotor body 9 rotor lamination stack 10 rotor cage winding 15 11 stator winding 12 stator lamination stack 13 manual release lever 14 coupling pin 15 reduction gear 20 16 transmission housing 17 transmission housing rearwall 18 transmission front cover 19 drive take-off hub 20 lift cables 25 21 intemal ring gear 22 first planet wheel 23 second planet wheel 24 support roller 25 motor shaft 30 26 first shaft bearing 27 second shaft bearing 28 first eccentric 29 second eccentric 30 fastening screws 35 31 first roller bearing CA 022l7299 l997-l0-02 32 second roller bearing 33 coupling bore 34 planet wheel toothing 35 brake lever bearing 5 36 brake lever 37 brake drum 38 handwheel flange 39 brake shoe 40 actuator 10 41 drive axis 42 second shaft end 43 circularly annular surface 44 hub 45 brake cylinder 15 46 brake disc 47 separate handv~heel 48 ventilabon opening 49 mounting bore
The reduced rotational speed of the coupling pins 14, the coupling hub 19 and the drive pulley 1 results from the tooth number dirrerence between the planet wheels 22, 23 and the intemal toothing 21 in the transmission housing 16, wherein the tooth number of the planet wheel toothing 34 is smaller than that of the intemal toothing 21 in the transmission housing 16. The l,dnslaLion ratio is c~lG~ ted from the tooth number of the intemal toothing 21 divided by the tooth number difference. The planet wheels 22 and 23 themselves rotate on a rotation of the motor shaft by the tooth number difference in opposite r~talional direction and, together with them, obviously also the coupling pins 14 with the support rollers 24, the drive take-off hub 19 and the drive pulley 1. A very large l,dnsldlion ratio can be produced in a small space by this kind of trans",ission. The two-layer execution of the ll ans" ,ission 15 leads to the fo" "a~on of two points of action, which are ~lispl~ced by 180(, of the drive take-off forces on the intemal toothing 21 in the transmission housing 16 and thus to a load distnbution which is favourable for operation and service life.
The principal load for the lift parts, which are to be supported and moved, in the shaft (cage, counterweight, cables) is carried by the drive pulley bearing 7, wherein apart from the radial and axial forces also tipping moments are taken up. The drive pulley bearing 7, 5 which is constructed as a heavy-duty bearing, comprises cruciro,l,lly arranged and obliquely set rollers, whereby not only radial loadings, but also quite considerable axial loadings, are possible in both directions.
The reduction gear 15 is disposed enbrely and the motor substantially within the bell-10 shaped drive pulley 1. In the shown example (Fig. 1), only a small part of the polyphasewinding 11 projects, by the righthand winding end, somewhat beyond the silhouette of the drive pulley 1. According to the respective dimensioning of the stator winding, this can lie entirely within the drive pulley silhouette. If a synchronous motor is executed instead of a polyphase motor, the rotor is equipped with permanent magnets and the stator is 15 constnucted with salient poles and pole windings.
A further compact mode of consbuction of the lift drive according to the invention yields the building on of a drum brake according to Fig. 4. In that case, a brake drum 37 with a handwheel flange 18 is arranged on the shaft end at the outer side. The brake fitting itself 20 consisls of the brake lever bearings 35, which are fastened at both sides of the brake drum 37 to the motor rear wall 4 and which each carry a brake lever 36 with a brake shoe 39. The two brake levers 36 are actuated by an actuator 40 against spring force. An electromagnet is preferably used as drive of the actuator 40.
25 Fig. 5 shows a disc brake, which is combined with the lift drive, as a third variant relaUng to brake build-up. Fastened on the motor shaft 25 is a brake disc 46, which is engaged around from above by an actuator 40 in the fomm of a brake sUrrup. The schemaUc representation of the actuator 40 is to leave open the possibility of actuating this el~c~,u,,,agneUcally or by hydraulic oil. In both forms of actl~tion, the braking ,.,o,nenl is 30 generated by a static spring force. The actuaUng device serves for the opening movement against this spring force. This mode of brake construction is also equipped with the manual release lever 13.
Fig. 6 shows the explained free circular annular surface 43, amongst other things for the 35 mounUng of the lift drive, at the motor housing rear wall 4. Mounting bores 49, which according to the respective form of fastening technique can have a thread, are present for the fastening of a mounting fitting, which is not illustrated. The number and arrangement of these mounting bores 49 depend on the existing constructional and other conditions of the lift installation. Flat, angled or specially shaped metal profile members, which are not 5 illustrated, with integrated vibration damping come into use as mounting fittings, according to the respective place and mode of installation. Moreover, ventilation openings 48 for air circulation for motor and transmission cooling, in the form of large bores in the example, are present in the circularly annular surface 43. The shape, number and arrangement of the ventilation openings 48 depend on the required cooling air quantity, which in tum 10 depends on the motor dissipation loss, the transmission efficiency and the ambient temperature. The possibility is also given of realising a forced independent air cooling through attachment of a blower. The motor housing rear wall 4 can itself be directly executed as a mounting fitting, wherein the motor housing rear wall 4 then projects beyond the motor housing 3 to at least one side, has mounting holes in the projecting part 15 and, according to the respective installation location and mode of installalion, has apprup, iately shaped end parts.
In the layout of this lift drive, apart from the compact mode of constnuction great value was placed on the ease of operation in the case of an evacuation of trapped passengers in a 20 stuck lift. Independently of the place of installation and the mode of installation the brake can, regardless of which type, be actuated from both sides - as seen in axial direction - by means of the manual release lever 13, thus in one instance directly from the brake side and in the other instance by way of the drive pulley. If the manually actuated brake opening is possible only from the drive pulley side, then, as already explained, a shaft end 25 42, which is at the side of the drive pulley, is provided for the temporary attachment of the handwheel 6.
The illustrated embodiment of the lift drive according to the invention is for a conveying load of 2,000 kilograms and a travel speed of up to 2.5 metres per second. For lower 30 conveying ~p~cilies the drive can be executed to be correspondingly lighter and smal!er, for example with less cable grooves, smaller diameter or shorter constructional length in axial direction.
The fact that the drive preferably comprises a normal polyphase squirrel-cage armature motor allows the use of a usual frequency and amplitude regulating electronic system for current supply and for regulation.
5 If a synchronous motor is to be realised, the current supply and control electronic system needed for this purpose is used analogously.
For smaller trans",ission ratios, moreover, the use of a planetary gear, which is preferably single stage, is also conceivable. The intemal toothing 21 in the ~cnsr"ission housing 16 10 would in principle remain the same, but there would be a sun wheel mounted on the motor shaft 25 instead of the ecce"~ics 28 and 29 and the coupling pins 14 would at the same time be axles of planet wheels.
Lift Drive Reference Symbol List 5 1 drivepulley 2 cable grooves 3 motor housing 4 motor housing rear wall 5 brake 10 6 handwheel 7 drive pulley bearing 8 rotor body 9 rotor lamination stack 10 rotor cage winding 15 11 stator winding 12 stator lamination stack 13 manual release lever 14 coupling pin 15 reduction gear 20 16 transmission housing 17 transmission housing rearwall 18 transmission front cover 19 drive take-off hub 20 lift cables 25 21 intemal ring gear 22 first planet wheel 23 second planet wheel 24 support roller 25 motor shaft 30 26 first shaft bearing 27 second shaft bearing 28 first eccentric 29 second eccentric 30 fastening screws 35 31 first roller bearing CA 022l7299 l997-l0-02 32 second roller bearing 33 coupling bore 34 planet wheel toothing 35 brake lever bearing 5 36 brake lever 37 brake drum 38 handwheel flange 39 brake shoe 40 actuator 10 41 drive axis 42 second shaft end 43 circularly annular surface 44 hub 45 brake cylinder 15 46 brake disc 47 separate handv~heel 48 ventilabon opening 49 mounting bore
Claims (10)
1. Compact drive for lifts, consisting of a motor, brake, mounting part, transmission and drive pulley, characterised in that a reduction gear (15) and a motor (8, 9, 10, 11) are arranged within the cylindrical cavity of a drive pulley (1), which is formed to be bell-shaped, with cable grooves (2).
2. Compact drive according to claim 1, characterised in that the drive has, outside the cavity of the drive pulley (1), a brake (5) with manual release lever (13).
3. Compact drive according to claim 1, characterised in that the drive has at the brake side a shaft end of a motor shaft (25) for plugging on of a handwheel (6).
4. Compact drive according to claim 1, characterised in that the motor shaft (25) is constructed to be extended and has at the drive pulley side a second shaft end (42).
5. Compact drive according to claim 1, characterised in that a polyphase cage rotor motor, the rotor (8, 9) of which has a cage winding (10) and the stator (12) of which has a polyphase winding (11), is present as motor.
6. Compact drive according to claim 1, characterised in that a synchronous motor, the rotor (8) of which has permanent magnets and the stator of which has shaped-out poles with pole windings, is present as motor.
7. Compact drive according to claim 1, characterised in that a two-layer, parallel pin transmission is provided as transmission (15), wherein the two contact positions thereof or the points of engagement of the planet wheels (22, 23) at the inner toothing (21) of the transmission housing (16) are arranged to be offset relative to one another by 180(.
8. Compact drive according to claim 1, characterised in that a rear wall (4) of the motor housing has mounting bores (49) for mounting fittings and ventilation openings (48) for motor and transmission cooling.
9. Compact drive according to claim 9, characterised in that the rear wall (4) of the motor housing projects beyond at least one side of the motor housing (3) and that the projecting part is constructed as a mounting fitting.
10. Compact drive according to claim 1, characterised in that a shoe brake (37, 38, 39, 40) is provided as brake and that the brake drum (37) has an edge with greater diameter usable as a handwheel (38).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP96810669 | 1996-10-07 | ||
| EP96810669.0 | 1996-10-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2217299A1 true CA2217299A1 (en) | 1998-04-07 |
Family
ID=8225715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2217299 Abandoned CA2217299A1 (en) | 1996-10-07 | 1997-10-02 | Compact drive for lifts |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH10127010A (en) |
| CA (1) | CA2217299A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2704868A1 (en) * | 2017-09-20 | 2019-03-20 | Tejedor Alvaro Gobernado | Residential elevator machine with drum cable winding (Machine-translation by Google Translate, not legally binding) |
| CN110002370A (en) * | 2019-05-13 | 2019-07-12 | 安徽维德电源有限公司 | A kind of driving of electri forklift and Hydraulic integration dynamical system and its control method |
| CN110562882A (en) * | 2019-09-10 | 2019-12-13 | 福建工程学院 | AGV trolley adopting electromagnetic hydraulic jacking |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000344449A (en) * | 1999-06-02 | 2000-12-12 | Teijin Seiki Co Ltd | Elevator drive |
| JP5220160B2 (en) * | 1999-07-02 | 2013-06-26 | ナブテスコ株式会社 | Reducer with motor |
| US7081062B2 (en) * | 2002-11-25 | 2006-07-25 | Delbert Tesar | Standardized rotary actuator |
| JP4831319B2 (en) * | 2006-04-06 | 2011-12-07 | 株式会社安川電機 | Motor with reduction gear |
| CN102107811B (en) * | 2009-12-28 | 2015-09-16 | 上海永大吉亿电机有限公司 | For the traction machine of elevator or Escalator |
| JP5861252B2 (en) * | 2010-12-09 | 2016-02-16 | 株式会社明電舎 | Elevator hoist emergency rescue device |
| CN103395675A (en) * | 2013-07-30 | 2013-11-20 | 广西正源电机有限公司 | Permanent-magnet synchronous traction machine |
-
1997
- 1997-10-02 CA CA 2217299 patent/CA2217299A1/en not_active Abandoned
- 1997-10-07 JP JP27479097A patent/JPH10127010A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2704868A1 (en) * | 2017-09-20 | 2019-03-20 | Tejedor Alvaro Gobernado | Residential elevator machine with drum cable winding (Machine-translation by Google Translate, not legally binding) |
| CN110002370A (en) * | 2019-05-13 | 2019-07-12 | 安徽维德电源有限公司 | A kind of driving of electri forklift and Hydraulic integration dynamical system and its control method |
| CN110002370B (en) * | 2019-05-13 | 2024-01-05 | 安徽维德电源有限公司 | Electric forklift driving and hydraulic integrated power system and control method thereof |
| CN110562882A (en) * | 2019-09-10 | 2019-12-13 | 福建工程学院 | AGV trolley adopting electromagnetic hydraulic jacking |
| CN110562882B (en) * | 2019-09-10 | 2024-04-16 | 福建工程学院 | AGV trolley adopting electromagnetic hydraulic jacking |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10127010A (en) | 1998-05-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |