Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
  • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
  • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
  • B66D5/12—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect
  • B66D5/14—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect embodying discs
• • 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
  • B66B11/0476—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation with friction gear, e.g. belt linking motor to sheave

Definitions

• the invention relates to a drive for an elevator with a car held on ropes according to the preamble of claim 1.
• a braking device which prevents the car from falling, at least when the power supply fails.
• a braking device act on the belt or traction sheave via a brake disc arranged coaxially to the latter. Since such drives are preferably integrated in the respective elevator shaft, the spatial conditions are limited.
• the drive and pulley are usually arranged as a flat package on a shaft wall such that they are at least partially adjacent to the car in the extreme position.
• the additional attachment of a braking device brings with it considerable space problems, which can generally only be solved by means of a hydraulic, very small braking device, which, however, entails a cost disadvantage.
• the invention is based on the problem of avoiding such disadvantages of a generic drive.
• a particularly compact design can be achieved if the braking device, which is designed as a disc or drum brake and acts on the motor shaft, is arranged between the drive motor and a fan wheel which is used in any case for its ventilation. This can then apply cooling air to both the drive motor and the braking device heated by current flow.
• an emergency power supply which ensures an uninterrupted power supply to the braking device in the event of a failure of the main voltage, a hand lever or the like for releasing the brake in the event of a failure of the main power supply can be dispensed with.
• the emergency power unit can also be used to release the brake electro-magnetically, thereby reducing the structural outlay.
• a control box with which the release of the brakes can be operated can be arranged at an easily accessible location, for example below an operating panel on the ground floor, below a staircase next to the elevator or at another convenient location.
• Several remote triggers can also be provided to release the brakes. The difficult accessibility of a hand lever housed in a machine room, for example above the elevator shaft, which was previously required to release the brakes is thus eliminated.
• the simplified design of the drive wheel due to the displacement of the brake device makes it possible to connect the pulley in one piece to the hub of the drive wheel and to flanged the drive wheel, which is subject to high wear, to it, so that it can be easily replaced.
• the drive wheel then essentially comprises only these two components.
• 1 shows a longitudinal section through a shaft head when the drive wheel and the drive motor of the drive according to the invention are arranged in the shaft head region
• 2 shows the drive according to the invention in a front view seen from the shaft
• FIG. 3 shows the drive according to FIG. 2 in plan view
• FIG. 5 is a view similar to FIG. 4 with the opposite housing part cut open
• Fig. 6 is a detailed view of the to be placed on the motor shaft
• Fig. 7 is a partially cutaway plan view of the drive wheel with the pulley and the flanged drive pulley.
• FIG. 10 shows the shaft base area of an elevator with a drive arranged at the bottom.
• the elevator designated overall by 1, has a vertical shaft 2 for the up and down movement of a car 3.
• a drive 5 is provided which has a drive wheel 6 and a drive wheel thereon acting drive motor 7 comprises.
• the connection between drive wheel 6 and drive motor 7 is established via at least one belt 8, which in the present case is designed as a V-ribbed flat belt and can transmit both drive and braking forces.
• the drive wheel 6 comprises a pulley 9, which is overrun by the belt 8, and a drive pulley 10, which carries the cables 11 for holding and driving the car 3.
• the drive motor 7 is pivotable overall via a rocker arm 12 on a cantilever part 35 of the support frame 13, which carries the bearing of the axis of rotation 14 of the drive wheel 6 on its main part 34 and is arranged via brackets 15 on the elevator shaft 2, in the area of a coaxial to the shaft 16 of the Drive motor 7 extending axis of rotation 17 supported.
• the rocker 12 is acted upon by a tension spring 18, which tensions the drive belt 8.
• hydraulic or other tensioning elements can also be considered. Except via the rocker arm 12 and its mounting on the support frame 13, the drive motor 7 requires no further mounting, in particular no direct mounting on the walls of the elevator shaft 2.
• the drive 5 can overall be held in a niche above an upper door fighter profile 36 in the shaft head 4 or in the shaft floor area 39 (FIG. 10) below a lower door frame 38. Maintenance access to the drive 5 is possible through an opening to the outside in order to implement maintenance from the outside.
• the drive motor 7 is assigned a braking device 20 which acts on the motor shaft 16.
• the braking device 20 can be used as a drum or disc brake.
• a brake disk 21 is provided, which is provided with friction surfaces 22 as engagement surfaces for brake shoes 40, 41, 42.
• the brake shoes 40, 41 are arranged on the one hand the brake disk 21 and form parts of a movable armature disk.
• the brake disc 21 is axially displaceable relative to the motor shaft 16.
• Stationary abutments 42 here a motor flange, serve as opposing brake shoes 42 with respect to the drive motor 7.
• the braking device 20 comprises two independently controllable coils 26, 43, which can be acted upon individually with current flow via electromagnetic actuation. In the de-energized state, the brake shoes 40, 41 are pressed by the springs 25 onto the friction surfaces 22 of the brake disk 21, as a result of which the axially displaceable brake disk 21 is pressed against the motor flange 42 on the opposite side. As a result, the rotation of the motor shaft 16 is inhibited.
• the braking device 20 is arranged overall on the so-called B-side of the drive motor 7 and, in addition to a fan wheel 28 and the drive motor 7, between the fan wheel 28 and the brake device 20, a hollow shaft encoder 44 can be arranged to regulate the motor speed.
• the brake device 20 can then be overlapped by a housing cap 29 together with the fan wheel 28. This design is particularly simple in terms of production technology, since only the motor shaft 16 and the overlapping housing cap 29 are to be enlarged in terms of their dimensions.
• the braking device 20 can then be pushed onto the motor shaft 16 as a modular unit. This simplifies assembly.
• the drive wheel 6 is designed such that the pulley 9, on the edge region of which the drive belt 8 is held, is formed in one piece with the hub 30 of the drive wheel 6. As a result, this component can be cast in one piece.
• the traction sheave 10 is placed on the pulley 9 in the region of a shoulder 31 and flanged there by means of bolts or the like. In the case of a connection via a plurality of bolts, the traction sheave 10 is easy to detach, which can thus be easily replaced as a wearing part.
• a completely electromagnetic braking device 20 can be used.
• a hydraulic brake device with the resulting increased costs can also be used, but is not required.
• a conventional asynchronous motor can be used as the drive motor 7, which only has to be equipped with an extended motor shaft 16.
• tensioning of the belt 8 is unnecessary.
• This is designed as a reinforced V-ribbed flat belt and is therefore also suitable for the transmission of braking forces.
• the drive 5 is aligned in the shaft in such a way that the axis of rotation 14 of the drive wheel 6 lies in the guide plane 32, which extends between vertical guide rails 33 for the car 3.
• the motor shaft 16 is parallel to the doors blocking the shaft access.
• the drive motor 7 is arranged in a pocket above the upper door fighter profile 36 or below the lower door frame 38 to save space.
• the driving wheel speed is reduced compared to the engine speed, in particular in a ratio of about 1:10.
• the ropes translate the driving wheel speed to the movement of the car in a ratio of 2: 1 or 1: 1.
• the drive belt 8 can (not shown) be formed from two or more independent, parallel belt parts.
• a safety interrogation device can be provided, which triggers braking or causes an interruption in the voltage supply to the motor 7 in the event of failure of one of the sub-belts, that is to say, for example, tearing.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Cage And Drive Apparatuses For Elevators (AREA)
• Braking Arrangements (AREA)
• Valve Device For Special Equipments (AREA)

Applications Claiming Priority (1)

Publications (2)

Family

ID=8167460

Family Applications (1)

Country Status (8)

Families Citing this family (4)

Family Cites Families (9)

• 1999
  • 1999-10-08 WO PCT/EP1999/007573 patent/WO2001027016A1/fr active IP Right Grant
  • 1999-10-08 DE DE59906401T patent/DE59906401D1/de not_active Expired - Lifetime
  • 1999-10-08 CA CA002386798A patent/CA2386798A1/fr not_active Abandoned
  • 1999-10-08 JP JP2001530042A patent/JP2003511324A/ja active Pending
  • 1999-10-08 EP EP99974106A patent/EP1218280B1/fr not_active Expired - Lifetime
  • 1999-10-08 TR TR2002/00905T patent/TR200200905T2/xx unknown
  • 1999-10-08 AT AT99974106T patent/ATE245597T1/de not_active IP Right Cessation
  • 1999-10-11 AU AU11517/00A patent/AU1151700A/en not_active Abandoned

Non-Patent Citations (1)

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