CN112499440A

CN112499440A - Machine room-less elevator transformation method and machine room-less elevator

Info

Publication number: CN112499440A
Application number: CN202011423690.3A
Authority: CN
Inventors: 莫振锋; 黄敏冬; 谭晓亨
Original assignee: Hitachi Elevator China Co Ltd
Current assignee: Hitachi Elevator China Co Ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-03-16
Anticipated expiration: 2040-12-08
Also published as: CN112499440B

Abstract

The invention relates to a machine room-less elevator transformation method and a machine room-less elevator. The transformation method of the elevator without the machine room comprises the following steps: disassembling all top hanging wheels at the top of the hoistway; installing a traction machine at the top of the well; the rope winding body is wound on the car diversion sheave, the traction sheave of the traction machine and the counterweight diversion sheave. Through installing the hauler at the well top, even meet torrential rain weather like this, the rainwater gets into the well pit, and the hauler at its top can not submergence yet to ponding in the well pit to avoid the hauler to damage, guarantee that the hauler can safe and reliable work, so not only can save because of the maintenance cost that the blister damaged the production, but also can ensure no computer lab elevator normal operating. In addition, the top hanging wheel at the top of the hoistway is dismantled, a plurality of hoistway components of the original machine room-free elevator are reserved at the same time, and the components can still be used by the new machine room-free elevator, so that the reconstruction cost can be reduced, and the construction period can be shortened.

Description

Machine room-less elevator transformation method and machine room-less elevator

Technical Field

The invention relates to the technical field of elevators, in particular to a machine room-less elevator transformation method and a machine room-less elevator.

Background

In machine roomless elevators, the hoisting machine is usually mounted in a hoistway pit, which is often the lowest position in the building. When the heavy rain weather occurs, rainwater is easy to seep into the well pit, and if accumulated water in the well is not cleaned in time, the traction machine is soaked in the rainwater and is easily damaged. The traction machine is one of the most core components of the elevator, the damage of the traction machine can cause the elevator to be incapable of operating normally, the use of a user is influenced, and meanwhile, the maintenance cost can be increased by maintaining the damaged traction machine. Moreover, even if the elevator is repaired and used again, the same problem still occurs if the elevator meets heavy rain again, and the use of the elevator is greatly influenced.

Disclosure of Invention

Therefore, the machine room-less elevator and the transformation method thereof need to be provided, which can avoid the damage of the traction machine after water enters the pit of the hoistway and ensure the safe and reliable work of the traction machine.

A machine room-less elevator transformation method comprises the following steps:

disassembling all top hanging wheels at the top of the elevator shaft;

installing a traction machine at the top of the well;

the rope winding body is wound on the car diversion sheave, the traction sheave of the traction machine and the counterweight diversion sheave.

In one embodiment, in the step of installing a traction machine on the top of the hoistway, the traction machine is installed on an original top hanger on the top of the hoistway; or, the original top hanging bracket is removed, a fixed seat is installed at the top of the well, and the traction machine is installed on the fixed seat.

In one embodiment, in the step of installing the traction machine on the top of the hoistway, the rope outlet points at both ends of the traction sheave of the traction machine are close to or coincide with the rope outlet point of the car diverting pulley and the rope outlet point of the counterweight diverting pulley, respectively.

In one embodiment, in the step of mounting a traction machine on the top of the hoistway, a projection of the traction machine on a hoistway pit is not coincident with a projection of a car on the hoistway pit;

in the step of installing the traction machine on the top of the well, the wheel axis of the traction wheel of the traction machine and the width direction of the lift car form an included angle.

In one embodiment, in the step of winding the rope winding body around the car return sheave, the traction sheave of the traction machine, and the counterweight return sheave, the original rope winding body is wound around the car return sheave, the traction sheave of the traction machine, and the counterweight return sheave using the original rope winding body, and the excess original rope winding body is cut off.

A machine roomless elevator, comprising:

an elevator hoistway, the elevator hoistway having a hoistway top and a hoistway pit;

the traction machine is arranged at the top of the well;

the rope pulley assembly is arranged in the elevator shaft and is in driving connection with the traction machine; and

the traction machine comprises a car, a car guide rail for guiding the car to move up and down, a counterweight and a counterweight guide rail for guiding the counterweight to move up and down, wherein the traction machine is fixed on the counterweight guide rail and the car guide rail positioned on the counterweight side; the car with to the weight average with rope sheave subassembly swing joint and can be in the operation of going up and down in the elevator well.

In one embodiment, the machine room-less elevator further comprises a top hanger mounted to the two counterweight guide rails at the top of the hoistway and to the car guide rail on the counterweight side, the hoisting machine being mounted to the top hanger;

or, no computer lab elevator still includes the fixing base, the fixing base install in two at well top counterweight guide rail and being located the car guide rail of counterweight side, the hauler install in the fixing base.

In one embodiment, the two counterweight guide rails are located on either side of the car guide rail centerline.

In one embodiment, the rope wheel assembly comprises a rope winding body, a car diversion wheel and a counterweight diversion wheel, the car diversion wheel is arranged at the bottom of the car, the counterweight diversion wheel is arranged on the counterweight, and the rope winding body is wound on the car diversion wheel, a traction wheel of the traction machine and the counterweight diversion wheel; the both ends of the rope winding body are respectively provided with a car rope head and a counterweight rope head, and the car rope head and the counterweight rope head are respectively fixed on the top of the hoistway.

In one embodiment, the rope outlet points at two ends of a traction wheel of the traction machine are close to or coincide with the rope outlet point of the car diversion sheave and the rope outlet point of the counterweight diversion sheave respectively;

the counterweight diverting pulley is parallel to a midline connecting surface between the two counterweight guide rails.

According to the machine room-less elevator transformation method and the machine room-less elevator, when the transformation is carried out, all top hanging wheels at the top of an elevator shaft are detached, then the traction machine is installed at the top of the shaft, and finally the rope winding body is wound on the car diversion sheave, the traction wheel of the traction machine and the counterweight diversion sheave. Therefore, under the condition that the traction machine outputs power, the lift car and the counterweight can move up and down in the lift shaft, and normal operation of the machine room-less elevator after transformation is realized. Through installing the hauler at the well top, even meet torrential rain weather like this, the rainwater gets into the well pit, and the hauler at well top also can not submergence to ponding in the well pit to avoid the hauler to damage, reduce the fault rate of elevator. Therefore, the maintenance cost caused by bubble damage can be saved, and the normal operation of the elevator without the machine room can be ensured. And the top hanging wheel at the top of the hoistway is dismantled, a plurality of hoistway components of the original machine room-free elevator are reserved, and the components can still be used by the new machine room-free elevator, so that the reconstruction cost can be reduced, and the construction period can be shortened. In addition, the rope winding body mode after the transformation is greatly simplified, the length of the rope winding body can be shortened, the running loss is reduced, and the running efficiency and the riding comfort are improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic diagram of a roping arrangement of a machine roomless elevator according to the invention before modernization;

fig. 2 is a top view of the machineroom-less elevator shown in fig. 1 before modification;

fig. 3 is a schematic structural view of the car-side top hanging sheave and the counterweight-side top hanging sheave mounted on the top hanging frame before the transformation of the machine-roomless elevator shown in fig. 1;

fig. 4 is a schematic structural view of the traction machine mounted on the base before the modification of the elevator without the machine room shown in fig. 1;

fig. 5 is a schematic diagram of a modified roping arrangement of an elevator without a machine room according to an embodiment of the present invention;

fig. 6 is a modified plan view of the machineroom-less elevator shown in fig. 5;

fig. 7 is a schematic structural view of the modified machine-roomless elevator shown in fig. 5 with the traction machine mounted on the top hanger;

fig. 8 is a schematic structural view of a modified hoistway pit base of the machine room-less elevator shown in fig. 5;

fig. 9 is a flow chart of the steps of a modernization method of a machineroom-less elevator according to an embodiment of the present invention.

Reference numerals: 10. an elevator hoistway; 11. a hoistway top; 12. a well pit; 20. a traction machine; 21. a traction sheave; 30. a car; 40. a counterweight; 50. a rope winding body; 60. a car diverting pulley; 70. a counterweight sheave; 80. a car rope head; 81. a counterweight rope head; 90. a top hanging wheel; 91. a hanging wheel is hung at the top of the side of the car; 92. hanging a hanging wheel at the top of the heavy side; 93. a top hanger; 100. a base.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1, fig. 1 shows a schematic diagram of a roping arrangement of a machine room-less elevator according to the invention before modernization. Before transformation, the machine room free elevator comprises an elevator shaft 10, a traction machine 20, a car 30, a car diverting pulley 60 arranged at the bottom of the car 30, a rope winding body 50, a counterweight 40, a counterweight diverting pulley 70 arranged at the counterweight 40 and a top hanging wheel 90. The top hanging sheave 90 includes a car-side top hanging sheave 91 and a counterweight-side top hanging sheave 92. The elevator shaft 10 is provided with a shaft top 11 and a shaft pit 12, a car-side top hanging sheave 91 and a counterweight-side top hanging sheave 92 are provided on the shaft top 11, and the hoisting machine 20 is provided on the shaft pit 12. The rope winding mode before modification is as follows: the rope winding body 50 is wound around the car return sheave 60, the car side top hanging sheave 91, the traction sheave 21, the counterweight side top hanging sheave 92, and the counterweight return sheave 70.

Referring to fig. 2, fig. 2 is a plan view of the machineroom-less elevator shown in fig. 1 before transformation. When viewed from above the hoistway before the modification, the counterweight 40 is located on one of the sides of the car 30, and the car-side top hanging sheave 91, the counterweight-side top hanging sheave 92, and the traction sheave 21 are located on the side of the car 30 in the same direction as the counterweight 40.

Referring to fig. 1, 5 and 9, fig. 5 shows a schematic diagram of a modified roping structure of an elevator without a machine room according to an embodiment of the present invention, and fig. 9 shows a flowchart of steps of a modified method of an elevator without a machine room according to an embodiment of the present invention. The method for modifying the elevator without the machine room provided by the embodiment of the invention comprises the following steps:

s10: removing all of the top sheaves 90 at the top of the hoistway 10;

in this embodiment, in the process of modifying the machine room-less elevator, the car-side top hanging sheave 91 and the counterweight-side top hanging sheave 92 that are originally provided on the top of the elevator shaft 10 are removed.

S20: installing a hoisting machine 20 on a hoistway top 11;

in step S20, the hoisting machine 20 mounted on the hoistway top portion 11 may be a new hoisting machine 20, that is, an unused hoisting machine 20. Of course, the hoisting machine 20 may be mounted to the hoistway pit 12 before modification, but the hoisting machine 20 is normally operable.

S30: the rope winding body 50 is wound around the car diverting pulley 60, the traction sheave 21 of the hoisting machine 20, and the counterweight diverting pulley 70.

In the method for modifying the elevator without the machine room, when the elevator without the machine room is modified, all the top hanging wheels 90 at the top of the elevator shaft 10 are detached, then the traction machine 20 is installed at the top 11 of the shaft, and finally the rope winding body 50 is wound on the car diverting pulley 60, the traction sheave 21 of the traction machine 20 and the counterweight diverting pulley 70. In this way, the car 30 and the counterweight 40 can be moved up and down in the elevator shaft 10 under the condition that the hoisting machine 20 outputs power, and normal operation of the modified machine room-less elevator is realized. By installing the hoisting machine 20 on the hoistway top 11, even if rainwater enters the hoistway pit 12 in heavy rain, the hoisting machine 20 on the hoistway top 11 is not submerged by accumulated water in the hoistway pit 12, so that damage to the hoisting machine 20 is avoided, and the failure rate of the elevator is reduced. Therefore, the maintenance cost caused by bubble damage can be saved, and the normal operation of the elevator without the machine room can be ensured. Furthermore, the top hanging wheel 90 of the hoistway top 11 is removed, and a plurality of hoistway components of the original machine room-less elevator, such as the car 30, the car diversion sheave 60, the counterweight 40, the counterweight diversion sheave 70 and the like, are kept, and can still be used for a new machine room-less elevator, so that the reconstruction cost can be reduced, and the construction period can be shortened. In addition, the rope winding body 50 mode after the transformation is greatly simplified, the length of the rope winding body 50 can be shortened, the running loss is reduced, and the running efficiency and the riding comfort are improved.

In one embodiment, referring to fig. 1, 4 and 8, in the step S10 of removing all the top hanging sheaves 90 at the top of the elevator hoistway 10, the existing hoisting machine 20 of the hoistway pit 12 is removed. Before the machine room free elevator is modified, the original tractor 20 is installed in the hoistway pit 12; specifically, the hoistway pit 12 is provided with a base 100, and the existing hoisting machine 20 is attached to the base 100. When the elevator without machine room is modified, the original hoisting machine 20 is detached from the base 100, and thus the hoistway pit 12 is provided with only the base 100. In this way, it is possible to avoid interference between the car 30 and the movement of the hoisting machine 20 existing in the hoistway pit 12, and to ensure normal operation of the car 30.

Of course, in other embodiments, the existing hoisting machine 20 may not be removed in order to shorten the construction period without affecting the normal use of the modified elevator. However, the existing hoisting machine 20 is no longer used as an elevator component after the elevator is modified.

In one embodiment, referring to fig. 3, 5, and 7, in step S20 of attaching the hoisting machine 20 to the hoistway top 11, the hoisting machine 20 is attached to an existing top hanger 93 of the hoistway top 11. Alternatively, the conventional top hanger 93 is removed, the fixing base is attached to the hoistway top 11, and the hoisting machine 20 is attached to the fixing base. In this way, the hoisting machine 20 can be firmly attached to the hoistway top portion 11, and the normal operation of the hoisting machine 20 can be effectively ensured.

Further, a top hanger 93 is attached to two counterweight guide rails and a car guide rail on the counterweight side, and the hoisting machine 20 is attached to the top hanger 93. Alternatively, the fixing base is attached to the two counterweight guide rails and the car guide rail located on the counterweight side, and the hoisting machine 20 is attached to the fixing base. In this way, the hoisting machine 20 is mounted on one car guide rail and two counterweight guide rails through the top hanger 93 or the fixing seat, that is, the hoisting machine 20 is mounted on three guide rails to form a triangular support surface, so that the structure is more stable, and the hoisting machine 20 is not easy to overturn.

Further, two counterweight guide rails are respectively positioned on both sides of the car guide rail center line. Thus, the counterweight guide track gauge is increased, i.e., the width of the counterweight 40 is increased; for the same weight of the counterweight housing, the height can be less, and thus the effect on the machine 20 is less when the counterweight 40 is traveling upward, while the top floor height can be made smaller.

In one embodiment, referring to fig. 5 and 6, in step S20 of installing the hoisting machine 20 on the hoistway top 11, the rope outgoing points at both ends of the traction sheave 21 of the hoisting machine 20 coincide with the rope outgoing point of the car diverting sheave 60 and the rope outgoing point of the counterweight diverting sheave 70, respectively. It will be understood that the projections of both ends of the traction sheave 21 on the hoistway pit 12 coincide with the projection of the car return sheave 60 on the hoistway pit 12 and the projection of the counterweight return sheave 70 on the hoistway pit 12, respectively, so that the wrap body 50 can be easily wrapped from the traction sheave 21 to the car return sheave 60 and the counterweight return sheave 70.

Of course, in other embodiments, the rope take-off points at both ends of the traction sheave 21 of the traction machine 20 are close to the rope take-off point of the car diverting pulley 60 and the rope take-off point of the counterweight diverting pulley 70, respectively. It is understood that in order to facilitate the arrangement of the traction sheave 21, the car return sheave 60, the counterweight return sheave 70, etc. in the elevator shaft 10, the projection of the two ends of the traction sheave 21 on the shaft pit 12 slightly coincides with the projection of the car return sheave 60 on the shaft pit 12 and the projection of the counterweight return sheave 70 on the shaft pit 12, respectively, and such a misalignment does not cause excessive wear of the sheaves.

Specifically, one end of the traction sheave 21 of the hoistway top portion 11 near the counterweight return sheave 70 is positioned at the upper end of the counterweight return sheave 70; alternatively, one end of the traction sheave 21 of the hoistway top portion 11 near the counterweight return sheave 70 is positioned at the lower end of the counterweight return sheave 70.

In one embodiment, referring to fig. 5 and 6, in step S20 of mounting the hoisting machine 20 on the hoistway top 11, the projection of the hoisting machine 20 on the hoistway pit 12 does not coincide with the projection of the car 30 on the hoistway pit 12. In this way, the hoisting machine 20 mounted on the hoistway top 11 does not collide with the elevator car 30 moving up and down, and the potential safety hazard that the elevator car 30 and the hoisting machine 20 collide when the hoisting machine 20 is disposed in the source hoistway pit 12 is eliminated, thereby ensuring normal up and down movement of the elevator car 30.

Specifically, in the present embodiment, the modified hoisting machine 20 is a thin hoisting machine 20 having a small dimension in the thickness direction parallel to the hoisting rotation axis, and the projection of the modified hoisting machine 20 on the hoistway pit 12 does not overlap with the projection of the car 30 on the hoistway pit 12, so that the hoisting machine 20 does not affect the lifting movement of the car 30, and the normal operation of the car 30 is ensured.

In one embodiment, referring to fig. 6, in the step S20 of installing the traction machine 20 to the top 11 of the hoistway, the wheel axis of the traction sheave 21 of the traction machine 20 is arranged at an angle to the width direction of the car 30. This is advantageous for reducing wear between the hoisting and roping body 50.

In one embodiment, referring to fig. 1 and 5, in the step of winding the rope winding body 50 around the car diverting pulley 60, the traction sheave 21 of the traction machine 20, and the counterweight diverting pulley 70, the original rope winding body 50 is wound around the car diverting pulley 60, the traction sheave 21 of the traction machine 20, and the counterweight diverting pulley 70 using the original rope winding body 50, and the excess original rope winding body 50 is cut off. Therefore, the original rope winding body 50 is reserved for use, so that the cost of the machine room-less elevator in the transformation process can be further reduced, and the resource saving is facilitated.

Of course, in the course of the actual reconstruction, it is estimated that the original rope 50 is worn too much and cannot be used, and the new rope 50 can be replaced. It should be noted that, regardless of the above-described manner, the modified rope winding body 50 is greatly simplified, the length of the rope winding body 50 can be shortened, the running loss can be reduced, and the running efficiency and the riding comfort can be improved.

Referring to fig. 5 and 6, an elevator without a machine room according to an embodiment of the present invention includes an elevator shaft 10, a traction machine 20, a sheave assembly, a car 30, car guide rails for guiding a lifting operation of the car 30, a counterweight 40, and counterweight guide rails for guiding a lifting operation of the counterweight 40. The elevator shaft 10 is provided with a shaft ceiling 11 and a shaft pit 12, and the hoisting machine 20 is provided on the shaft ceiling 11. The sheave assembly is disposed within the elevator hoistway 10 and is drivingly connected to the machine 20. The hoisting machine 20 is fixed to a counterweight guide rail and a car guide rail on the counterweight side, and the car 30 and the counterweight 40 are both movably connected to the sheave assembly and can move up and down in the elevator shaft 10.

Specifically, the elevator without a machine room of the present embodiment is obtained by using the method for modifying an elevator without a machine room of any of the above embodiments.

It should be noted that, referring to fig. 1, fig. 2, fig. 5 and fig. 6, the elevator without machine room is obtained by modifying the original elevator without machine room. The elevator shaft 10, the car 30, the car guide rails, the counterweight 40 and the counterweight guide rails are all elevator components of an original machine room-less elevator, and the elevator components are not detached and replaced, and the installation positions are not changed, so that the elevator components are directly used in a new machine room-less elevator. In the process of modifying the machine room-less elevator, only the top hanging sheaves 90 of the hoistway top 11 are removed, that is, the car-side top hanging sheave 91 and the counterweight-side top hanging sheave 92 are removed, and the hoisting machine 20 is mounted on the hoistway top 11. The hoisting machine 20 of the conventional machine-room-less elevator is removed from the hoistway pit 12 or remains in the hoistway pit 12, and if the conventional hoisting machine 20 remains in the hoistway pit 12, the conventional hoisting machine 20 is no longer used as an elevator component.

When the machine room-less elevator is modified, all the top hanging wheels 90 at the top of the elevator shaft 10 are detached, then the traction machine 20 is installed on the counterweight guide rail and the car guide rail at the top 11 of the shaft, and finally the rope wheel assembly is in driving connection with the traction machine 20. In this way, the car 30 and the counterweight 40 can be moved up and down in the elevator shaft 10 under the condition that the hoisting machine 20 outputs power, and normal operation of the modified machine room-less elevator is realized. By installing the hoisting machine 20 on the hoistway top 11, even if rainwater enters the hoistway pit 12 in heavy rain, the hoisting machine 20 on the hoistway top 11 is not submerged by accumulated water in the hoistway pit 12, so that damage to the hoisting machine 20 is avoided, and the failure rate of the elevator is reduced. Therefore, the maintenance cost caused by bubble damage can be saved, and the normal operation of the elevator without the machine room can be ensured. In addition, in the transformation process, only the top hanging wheel 90 of the hoistway top 11 is removed, and a plurality of hoistway components of the original machine room-less elevator are reserved and can still be used by the new machine room-less elevator, so that the transformation cost can be reduced, and the construction period can be shortened.

In one embodiment, the machine 20 is located at the top of the hoistway 11 and the hoistway pit 12 is not provided with the machine 20. In fig. 1, 4, and 8, before the machine room-less elevator is modified, the conventional hoisting machine 20 is installed in the hoistway pit 12; specifically, the hoistway pit 12 is provided with a base 100, and the existing hoisting machine 20 is attached to the base 100. When the elevator without machine room is modified, the original hoisting machine 20 is detached from the base 100, and thus the hoistway pit 12 is provided with only the base 100. In this way, the normal operation of the car 30 can be ensured while avoiding the interference of the movement of the car 30 with the hoisting machine 20 existing in the hoistway pit 12.

Of course, referring to fig. 5, in other embodiments, the existing hoisting machine 20 may not be removed in order to shorten the construction period without affecting the normal use of the modified elevator. However, the existing hoisting machine 20 is no longer used as an elevator component after the elevator is modified.

In one embodiment, referring to fig. 5 and 7, the machineroom-less elevator further includes a top hanger 93, the top hanger 93 is mounted to two counterweight guide rails of the top 11 of the hoistway and a car guide rail located at a counterweight side, and the traction machine 20 is mounted to the top hanger 93. It is to be understood that, referring to fig. 1, 3 and 7, the top hanger 93 is a component of an existing machine-roomless elevator, and the traction machine 20 is directly mounted on the top hanger 93 after the car-side top hanger sheave 91 and the counterweight-side top hanger sheave 92 are removed from the top hanger 93. In this way, the hoisting machine 20 can be securely and reliably attached to the hoistway ceiling portion 11, and the modification cost and the construction period can be reduced. In addition, the hoisting machine 20 is mounted on the car guide rail and the two counterweight guide rails through the top hanger 93, that is, the hoisting machine 20 is mounted on the three guide rails to form a triangular support surface, so that the structure is more stable, and the hoisting machine 20 is not prone to toppling.

Of course, in other embodiments, the machine room-less elevator further includes a fixing base, the fixing base is disposed on two counterweight guide rails of the hoistway top portion 11 and a car guide rail located on the counterweight side, and the traction machine 20 is mounted on the fixing base. It is understood that the original top hanger 93 is removed, a fixing base is installed at the hoistway top 11, and the traction machine 20 is installed at the fixing base. In this way, the hoisting machine 20 can be securely and reliably attached to the hoistway top portion 11. In addition, the traction machine 20 is mounted on the car guide rail and the two counterweight guide rails through the fixing seat, that is, the traction machine 20 is mounted on the three guide rails to form a triangular support surface, so that the structure is more stable, and the traction machine 20 is not easy to overturn.

Further, two counterweight guide rails are respectively positioned on two sides of the central line of the car guide rail. Thus, the counterweight guide track gauge is increased, i.e., the width of the counterweight 40 is increased; for the same weight of the counterweight housing, the height can be less, and thus the effect on the machine 20 is less when the counterweight 40 is traveling upward, while the top floor height can be made smaller.

In one embodiment, referring to fig. 6, the projection of the machine 20 on the hoistway pit 12 is not coincident with the projection of the car 30 on the hoistway pit 12. In this way, the hoisting machine 20 mounted on the hoistway top 11 does not collide with the car 30 in the lifting operation, and the potential safety hazard that the car 30 and the hoisting machine 20 collide with each other when the hoisting machine 20 is disposed in the hoistway pit 12 is eliminated, thereby ensuring the normal lifting operation of the car 30.

Specifically, in the present embodiment, referring to fig. 5 and 6, the modified hoisting machine 20 is a thin hoisting machine 20 having a small dimension in the thickness direction parallel to the hoisting rotation axis, and the projection of the modified hoisting machine 20 on the hoistway pit 12 does not overlap with the projection of the car 30 on the hoistway pit 12, so that the hoisting machine 20 does not affect the lifting operation of the car 30, and the normal operation of the car 30 is ensured.

In one embodiment, referring to fig. 6, the wheel axis of the traction sheave 21 of the traction machine 20 is arranged at an angle to the width direction of the car 30. In this way, it is advantageous to reduce the wear between the traction sheave 21 and the roping 50.

In one embodiment, referring to fig. 5 and 6, the sheave assembly includes a rope winding body 50, a car diverting sheave 60, and a counterweight diverting sheave 70, the counterweight diverting sheave 70 is provided at the counterweight 40, the car diverting sheave 60 is provided at the car 30, and the rope winding body 50 is wound around the car diverting sheave 60, the traction sheave 21 of the traction machine 20, and the counterweight diverting sheave 70. When the hoisting machine 20 drives the traction sheave 21 to rotate in this way, the synchronous-motion rope winding body 50 slides on the car return sheave 60 and the counterweight return sheave 70, so that the car 30 and the counterweight 40 can move up and down in the elevator shaft 10, and normal operation of the modified elevator without a machine room is realized. In addition, the rope winding body 50 mode after the transformation is greatly simplified, the length of the rope winding body 50 can be shortened, the running loss is reduced, and the running efficiency and the riding comfort are improved.

Optionally, the roping 50 is a steel rope. The steel wire rope has high strength, and has better wear resistance and durability. Of course, in other embodiments, the rope winding body 50 may be other members, and is not limited thereto.

Further, referring to fig. 5 and 6, the sheave assembly further includes a car rope 80 and a counterweight rope 81 provided at both ends of the rope winding body 50, and the car rope 80 and the counterweight rope 81 are respectively located at both sides in the width direction of the car 30 and connected to the top 11 of the hoistway. It is understood that the width direction of the car 30 refers to the direction in which the doors are located. In this way, the two ends of the rope winding body 50 can be connected to the hoistway top portion 11 through the car rope end 80 and the counterweight rope end 81, respectively, so that the rope winding body 50 is stably connected to the hoistway top portion 11, thereby ensuring safe operation of the car 30 in the elevator hoistway 10. In addition, the car rope head 80 and the counterweight rope head 81 are respectively arranged on two sides of the car 30 in the width direction, so that the car 30, the hoisting machine 20 and the counterweight 40 can be reasonably arranged in the elevator shaft 10, collision and interference of all parts is avoided, and normal lifting operation of the car 30 in the elevator shaft 10 is ensured.

In one embodiment, referring to fig. 5 and 6, the rope take-off points of both ends of the traction sheave 21 of the traction machine 20 are close to or coincide with the rope take-off point of the car diverting sheave 60 and the rope take-off point of the counterweight diverting sheave 70, respectively. It will be understood that the projections of both ends of the traction sheave 21 on the hoistway pit 12 coincide with the projection of the car return sheave 60 on the hoistway pit 12 and the projection of the counterweight return sheave 70 on the hoistway pit 12, respectively, so that the wrap body 50 can be easily wrapped from the traction sheave 21 to the car return sheave 60 and the counterweight return sheave 70. Alternatively, in order to arrange the traction sheave 21, the car return sheave 60, the counterweight return sheave 70, and the like in the elevator shaft 10, projections of both ends of the traction sheave 21 on the shaft pit 12 are slightly misaligned with projections of the car return sheave 60 on the shaft pit 12 and projections of the counterweight return sheave 70 on the shaft pit 12, respectively, and such misalignment does not cause excessive wear of the sheaves.

Specifically, referring to fig. 5 and 6, one end of the traction sheave 21 near the counterweight diverting pulley 70 is located at the upper end of the counterweight diverting pulley 70. Alternatively, one end of the traction sheave 21 close to the counterweight return sheave 70 is positioned at the lower end of the counterweight return sheave 70. In this way, on the one hand, it is facilitated to wind the rope winding body 50 from the traction sheave 21 to the counterweight return sheave 70; on the other hand, excessive wear between the traction sheave 21 and the counterweight diverting pulley 70 can be avoided.

In one embodiment, referring to fig. 6, the counterweight diverting pulley 70 is parallel to the central connecting plane between the two counterweight guide rails. It should be noted that, the counterweight diverting pulley 70 of the original elevator without machine room is generally parallel to the central connecting surface between the two counterweight guide rails, and in the transformation of the elevator without machine room, the counterweight diverting pulley 70 is parallel to the central connecting surface between the counterweight guide rails, so that the counterweight frame does not need to be replaced, the transformation cost is reduced, and meanwhile, the construction period is short. In addition, the counterweight sheave 70 parallel to the center connecting surface between the counterweight guide rails is more easily installed in the counterweight housing, and the connecting structure is simpler.

In one embodiment, referring to fig. 5 and 6, the counterweight 40 and the traction machine 20 are disposed on the same side of the car 30, and the traction sheave 21 is located between the car 30 and the counterweight 40. Alternatively, the counterweight 40 and the hoisting machine 20 are provided on the left side of the car 30; alternatively, the counterweight 40 and the hoisting machine 20 are provided on the right side of the car 30. In this way, the wrap rope body 50 can be easily wrapped from the traction sheave 21 to the car return sheave 60 and the counterweight return sheave 70.

Specifically, in the present embodiment, the counterweight 40 and the hoisting machine 20 are provided on the left side of the car 30, the traction sheave 21 is positioned between the counterweight 40 and the car 30, and the rope exit points at both ends of the traction sheave 21 are close to the rope exit point of the car diverting sheave 60 and the rope exit point of the counterweight diverting sheave 70, respectively.

Specifically, referring to fig. 6, the counterweight 40 is disposed to extend in the depth direction of the car 30, and the counterweight 40 is disposed in parallel with the depth direction of the car 30. It is understood that the depth direction of the cage 30 is a direction perpendicular to the direction in which the doors are located. In this way, under the driving action of the hoisting machine 20, the counterweight 40 and the car 30 are effectively prevented from moving and interfering in the elevator shaft 10, so that the car 30 can be ensured to normally run in the elevator shaft 10. At the same time, the car 30 is also allowed to run smoothly in the elevator shaft 10, thereby improving riding comfort.

In one embodiment, referring to fig. 5 and 6, two car diverting pulleys 60 are provided, and the two car diverting pulleys 60 are spaced apart from each other in the width direction of the bottom of the car 30. It should be understood that the width direction of the bottom of the car 30 refers to the direction in which the doors of the car 30 are located, and may also be understood as the direction in which the doors move during opening and closing. Therefore, the two car diversion sheaves 60 are stably contacted with the rope winding body 50, so that the even stress of the car 30 can be ensured, the car 30 can be kept in a horizontal posture, and the riding comfort is improved. Of course, in other embodiments, the number and the arrangement position of the car diversion sheaves 60 may be set according to actual requirements, for example, one car diversion sheave 60 is arranged, the car diversion sheave 60 is arranged on the top of the car 30, and the like.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance to 40 or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A transformation method of a machine room free elevator is characterized by comprising the following steps:

disassembling all top hanging wheels at the top of the elevator shaft;

installing a traction machine at the top of the well;

2. The machine room-less elevator modernization method according to claim 1, wherein in the step of installing a traction machine on the top of the hoistway, the traction machine is installed on an original top hanger on the top of the hoistway; or, the original top hanging bracket is removed, a fixed seat is installed at the top of the well, and the traction machine is installed on the fixed seat.

3. The method according to claim 1, wherein in the step of installing a hoisting machine on the top of the hoistway, the rope exit points at both ends of a traction sheave of the hoisting machine are respectively close to or coincide with the rope exit point of the car return sheave and the rope exit point of the counterweight return sheave.

4. The machine roomless elevator modernization method of claim 1, wherein in the step of installing a hoisting machine on the top of the hoistway, a projection of the hoisting machine on a hoistway pit is not coincident with a projection of a car on the hoistway pit;

5. The method of modifying an elevator without machine room according to claim 1, wherein in the step of winding the rope winding body around the car return sheave, the traction sheave of the traction machine, and the counterweight return sheave, an original rope winding body is wound around the car return sheave, the traction sheave of the traction machine, and the counterweight return sheave, and an excess of the original rope winding body is cut off.

6. An elevator without machine room, characterized in that the elevator without machine room comprises:

the traction machine is arranged at the top of the well;

7. The machine room-less elevator according to claim 6, further comprising a top hanger mounted to the two counterweight guide rails and the car guide rail on the counterweight side at the top of the hoistway, the traction machine being mounted to the top hanger;

8. The machine roomless elevator of claim 7, wherein two of the counterweight guide rails are located on either side of the car guide rail centerline.

9. The machine room-less elevator according to claim 6, wherein the sheave assembly includes a rope winding body, a car diverting sheave and a counterweight diverting sheave, the car diverting sheave is provided at the bottom of the car, the counterweight diverting sheave is provided at the counterweight, and the rope winding body is wound around the car diverting sheave, a traction sheave of the traction machine and the counterweight diverting sheave; the both ends of the rope winding body are respectively provided with a car rope head and a counterweight rope head, and the car rope head and the counterweight rope head are respectively fixed on the top of the hoistway.

10. The machine room-less elevator according to claim 9, wherein the rope exit points at both ends of the traction sheave of the traction machine are close to or coincide with the rope exit point of the car diverting pulley and the rope exit point of the counterweight diverting pulley, respectively;