CN112499442A

CN112499442A - Machine room-less elevator transformation method and machine room-less elevator

Info

Publication number: CN112499442A
Application number: CN202011425236.1A
Authority: CN
Inventors: 莫振锋; 谭晓亨; 黄敏冬
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

Abstract

The invention relates to a machine room-less elevator transformation method and a machine room-less elevator, which comprises the following steps: removing a top hanging wheel at the top of an elevator shaft, and installing a new traction machine at the original position of the top hanging wheel; and removing an old traction machine of a well pit, and installing the top hanging wheel to the well pit to form a pit diverting pulley. Because new hauler has been installed in elevator well top position, therefore even if meet heavy rain weather, the rainwater seepage gets into the well pit, and the rainwater is gathered also can't contact the new hauler of submergence again, and the hauler can not suffer rainwater and soak and can guarantee safe and reliable work all the time, not only can save the cost of maintenance because of the blister damage produces, can also ensure no computer lab elevator normal operating simultaneously.

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

At present, to most elevators, no computer lab elevator especially, the hauler is installed on the well pit, and because the well pit often is the position that the relief is the lowest in the building, when meetting torrential rain weather, the well pit is the rainwater of infiltrating into very easily, and the rainwater is gathered gradually and is rised, can cause the hauler to soak in the rainwater. If can not in time clear up ponding this moment, then can lead to the hauler to soak water for a long time, damage appears in the hauler, not only can increase cost of maintenance, damages simultaneously and maintenance deadline, and the unable normal operating of elevator influences user and uses experience.

Disclosure of Invention

Based on this, it is necessary to provide a method for modifying a machine room-less elevator and a machine room-less elevator, and the method and the elevator aim to solve the problems that in the prior art, a traction machine is easily submerged by rainwater, so that the traction machine cannot normally work and normal operation of the elevator is affected.

In one aspect, the application provides a method for modifying a machine room-less elevator, comprising the following steps:

removing a top hanging wheel at the top of an elevator shaft, and installing a new traction machine at the original position of the top hanging wheel;

and removing an old traction machine of a well pit, and installing the top hanging wheel to the well pit to form a pit diverting pulley.

The method for modifying the elevator without the machine room comprises the steps of arranging a traction machine in a pit of an elevator shaft, and arranging the traction machine in the pit of the elevator shaft. Specifically, when the elevator is modified, the top hanging wheel at the top of the elevator shaft is detached, then a new traction machine is installed at the original position of the detached top hanging wheel, then the old traction machine at the shaft pit is detached, the detached top hanging wheel is installed at the original position of the old traction machine at the shaft pit, the rope wheel assembly is installed in the elevator shaft and is in driving connection with the new traction machine, and finally the car, the counterweight and the pit reverse rope wheel are respectively movably connected with the rope wheel assembly, so that the car and the counterweight can move up and down in the elevator shaft under the condition that the traction machine outputs power, and the normal operation of the newly modified machine-roomless elevator is realized. Because new hauler has been installed in elevator well top position, therefore even if meet heavy rain weather, the rainwater seepage gets into the well pit, and the rainwater is gathered also can't contact the new hauler of submergence again, and the hauler can not suffer rainwater and soak and can guarantee safe and reliable work all the time, not only can save the cost of maintenance because of the blister damage produces, can also ensure no computer lab elevator normal operating simultaneously.

In addition, because the new traction machine and the pit diverting pulley are respectively reinstalled at the original positions, the original elevator components are not required to be disassembled and replaced, and can still be reserved for the use of a new machine room-free motor, the modification cost can be greatly reduced, and the resource consumption is saved.

The technical solution of the present application is further described below:

in one embodiment, in the step of removing the top hanging sheave at the top of the elevator shaft and installing the new hoisting machine at the original position of the top hanging sheave, the new hoisting machine is installed on the top hanging sheave at the top of the elevator shaft, or a fixed seat is installed at the top of the elevator shaft and the new hoisting machine is installed on the fixed seat.

In one embodiment, in the step of removing the top hanging wheel at the top of the elevator shaft and installing the new traction machine at the original position of the top hanging wheel, when the pit diverting pulley is arranged opposite to the heavy side top hanging wheel, the wheel axis of the traction wheel of the new traction machine is arranged at an included angle with the width direction of the car.

In one embodiment, in the step of removing the top hanging wheel at the top of the elevator shaft and installing the new traction machine at the original position of the top hanging wheel, when the pit diverting pulley is set as the car-side top hanging wheel, the wheel axis of the traction wheel of the new traction machine is arranged perpendicular to the length direction of the car.

In one embodiment, in the step of removing the top hanging wheel at the top of the elevator shaft and installing the new traction machine at the original position of the top hanging wheel, the projection of the new traction machine on the shaft pit is not coincident with the projection of the car on the shaft pit.

In addition, this application still provides a no computer lab elevator, no computer lab elevator includes:

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

a pit diverting pulley disposed in the hoistway pit;

the traction machine is arranged at the top of the well, the wheel axis of a traction wheel of the traction machine and the width direction of the lift car form an included angle, and the installation position of the traction machine is set as the original position of the pit diversion sheave; and

car, rope sheave subassembly and to heavy, the rope sheave subassembly set up in the elevator well and with the hauler drive connection, the car with to the weight average with rope sheave subassembly swing joint can be in lifting movement in the elevator well, pit diversion sheave with rope sheave subassembly swing joint.

In one embodiment, the top of the well is provided with a top hanger, and the traction machine is arranged on the top hanger.

In one embodiment, a projection of the machine on the hoistway pit is not coincident with a projection of the car on the hoistway pit.

In one embodiment, the machine-roomless elevator further comprises a pit base disposed on the hoistway pit, the pit diverting pulley being disposed on the pit base.

In one of them embodiment, the rope sheave subassembly includes towline, car diverting pulley, top hanging wheel and to heavy diverting pulley, car diverting pulley set up in the bottom of car, the top hanging wheel set up in the well top, to heavy diverting pulley set up in to heavy on, the hauler is equipped with the towline, the towline around adorn in car diverting pulley the top hanging wheel the towline the pit diverting pulley with to heavy on the diverting pulley, just the both ends of towline are equipped with car fag end and counterweight fag end respectively, the car fag end with counterweight fag end is fixed in respectively the top of elevator well.

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 based on these drawings without creative efforts.

Fig. 1 is a view showing a layout structure of an old traction machine in an elevator without a machine room in the present invention;

fig. 2 is a schematic structural view of an elevator without a machine room according to an embodiment of the present invention;

FIG. 3 is a schematic top view of the structure of FIG. 2;

fig. 4 is a schematic structural view of the new traction machine of the present invention installed on the top hanger;

FIG. 5 is a schematic view of the structure of the pit diverting pulley installed on the pit base in the present invention;

fig. 6 is a flow chart of the steps of the method for modifying an elevator without a machine room in the invention.

Description of reference numerals:

10. an elevator hoistway; 11. a hoistway top; 12. a well pit; 20. a pit diverting pulley; 30. a traction machine; 31. a traction sheave; 40. a car; 50. a counterweight; 60. a top hanger; 70. a pit base; 80. a hoisting rope; 81. a car rope head; 82. a counterweight rope head; 90. a car diverting pulley; 100. a counterweight sheave; 110. a hanging wheel is hung at the top of the side of the car; 120. and hanging a hanging wheel at the top of the counterweight side.

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.

As shown in fig. 2, a machine room-less elevator provided for an embodiment of the present application includes: an elevator hoistway 10, a pit diverting pulley 20, a hoisting machine 30, a car 40, a sheave assembly, and a counterweight 50. The elevator shaft 10 is provided with a shaft top 11 and a shaft pit 12; the pit diverting sheave 20 is provided in the hoistway pit 12; the traction machine 30 is arranged at the top 11 of the shaft, and the installation position of the traction machine 30 is set as the original position of the pit diversion sheave 20; the rope sheave assembly is arranged in the elevator shaft 10 and is in driving connection with the traction machine 30, the car 40 and the counterweight 50 are movably connected with the rope sheave assembly and can move up and down in the elevator shaft 10, and the pit diversion sheave 20 is movably connected with the rope sheave assembly.

With continuing reference to fig. 1 and 2, it should be noted that the elevator without machine room of the above-mentioned embodiment is a new elevator without machine room obtained by modifying an old elevator without machine room. Wherein the elevator shaft 10, car 40, sheave assembly and counterweight 50 are attached to the elevator components of the old machine room-less elevator, which are not removed, replaced and modified, but are directly used in the new machine room-less elevator. Only the hoisting machine 30 is a newly used hoisting machine 30, the old hoisting machine 30 originally mounted in the hoistway pit 12 is removed (not used), the pit transfer sheave 20 is a top hanging sheave originally mounted in the hoistway ceiling 11, and the top hanging sheave is detached from the hoistway ceiling 11 and transferred to the hoistway pit 12 as it is to form the pit transfer sheave 20 so as to leave the mounting position of the new hoisting machine 30.

The method for modifying the elevator without the machine room in the scheme specifically relates to structural modification of the elevator without the machine room, and specifically compared with the traditional elevator without the machine room, in which the traction machine 30 is arranged in the pit of the elevator shaft 10, by adjusting the installation position of the traction machine 30, when the elevator without the machine room is modified, only the new traction machine 30 and the new installation position thereof need to be replaced, and the original elevator components of the elevator without the machine room can be kept to continue to be used as a new elevator without the machine room. Specifically, during the modification, the top hanging wheel at the top of the elevator shaft 10 is detached, then the new hoisting machine 30 is installed at the original position of the detached top hanging wheel, then the old hoisting machine 30 of the shaft pit 12 is detached, then the detached top hanging wheel is installed at the original position of the old hoisting machine 30 of the shaft pit 12, the rope pulley assembly is installed in the elevator shaft 10 and is in driving connection with the new hoisting machine 30, and finally the car 40, the counterweight 50 and the pit diverting pulley 20 are respectively movably connected with the rope pulley assembly, so that the car 40 and the counterweight 50 can move up and down in the elevator shaft 10 under the condition that the hoisting machine 30 outputs power, namely, the normal operation of the newly modified machine-roomless elevator is realized. Because the new traction machine 30 is installed at the top of the elevator shaft 10, even if rainstorm weather occurs, rainwater leaks into the shaft pit 12, rainwater is accumulated, and the rainwater cannot contact and immerse the new traction machine 30, the traction machine 30 cannot be soaked by the rainwater, so that safe and reliable work can be ensured all the time, the maintenance cost caused by damage of bubbles can be saved, and the normal operation of the elevator without a machine room can be ensured.

With continued reference to fig. 2 and 4, in some embodiments, the hoistway top 11 is provided with a top hanger 60, and the hoisting machine 30 is provided on the top hanger 60. The top hanger 60 enables the top hanger sheave (i.e., the pit diverting sheave 20) and the traction machine 30 to be stably mounted on the hoistway top 11. For example, the top hanger 60 is made of a steel member such as angle iron by welding or splicing, and then fixed to the hoistway top 11 by screwing or other mounting means having equivalent technical effects. The top hanger 60 has a simple structure and high structural strength.

Alternatively, the elevator without a machine room further includes a fixing base (not shown in the drawings), the fixing base is disposed on the hoistway top portion 11, and the traction machine 30 is disposed on the fixing base. That is, according to actual needs, the new hoisting machine 30 may be mounted and fixed on the hoisting machine 30 by using a new fixing base without being mounted on the existing top hanger 60, and the firm and reliable mounting of the hoisting machine 30 can be ensured as well.

Further, a slide rail is arranged on the fixed seat, a slide block is arranged in the slide rail in a sliding mode, a lock catch is installed on the slide block, and the traction machine 30 is installed on the slide block. The sliding block slides on the sliding rail, the working position of the traction machine 30 can be flexibly adjusted according to the size of the traction machine 30, and meanwhile, the sliding adjustment operation is beneficial to eliminating installation size errors, and the new traction machine 30 can be more accurately matched with the original elevator component.

With continued reference to fig. 3, to ensure smooth elevator car 40 movement, the hoistway top 11 is typically equipped with two top sheaves, namely a car-side top sheave 110 and a counterweight-side top sheave 120. In some embodiments, the pit diverting pulley 20 may be provided as a counterweight-side top hanging pulley 120 in which the wheel axis of the traction sheave 31 of the traction machine 30 is disposed at an angle to the width direction of the car 40. This can help to reduce wear between the traction sheave 31 and the hoist rope 80.

Alternatively, in another embodiment, the pit diverting pulley 20 is provided as a car-side overhead sheave 110, and the wheel axis of the traction sheave 31 of the traction machine 30 is arranged perpendicular to the longitudinal direction of the car 40. Therefore, the hoisting rope 80 can be prevented from generating bending torque, the stable rotation is ensured, and the hoisting rope 80 is prevented from being easily broken due to overlarge stress.

With continued reference to fig. 3, further, the projection of the hoisting machine 30 on the hoistway pit 12 is not coincident with the projection of the car 40 on the hoistway pit 12. In this way, the newly installed hoisting machine 30 and the car 40 do not overlap in the vertical direction, so that collision interference is not caused to the car 40 moving up and down, and potential safety hazards of collision between the car 40 and the hoisting machine 30, which is potential when the hoisting machine 30 is arranged in the original hoistway pit 12, can be fundamentally eliminated.

With continued reference to fig. 2 and 5, in some embodiments, the machineroom-less elevator further includes a pit base 70, the pit base 70 being disposed on the hoistway pit 12, and the pit diverting pulley 20 being disposed on the pit base 70. The pit base 70 can reliably install and fix the pit diverting pulley 20, so that the hoisting rope 80 can reliably run, and the stable lifting movement of the car 40 is ensured.

Continuing to refer to fig. 2, the sheave assembly includes a traction rope 80, a car diverting pulley 90, a top hanging pulley and a counterweight diverting pulley 100, the car diverting pulley 90 is disposed at the bottom of the car 40, the top hanging pulley is disposed at the top of the hoistway 11, the counterweight diverting pulley 100 is disposed on the counterweight 50, the traction machine 30 is provided with a traction sheave 31, the traction rope 80 is wound on the car diverting pulley 90, the top hanging pulley, the traction sheave 31, the pit diverting pulley 20 and the counterweight diverting pulley 100, and two ends of the traction rope 80 are respectively provided with a car rope head 81 and a counterweight rope head 82, and the car rope head 81 and the counterweight rope head 82 are respectively fixed at the top of the elevator hoistway 10.

Therefore, when the hoisting machine 30 drives the traction sheave 31 to rotate, the hoisting rope 80 is synchronously driven to slide on the car return sheave 90, the overhead hoist sheave, the pit return sheave 20, and the counterweight return sheave 100, and the car 40 and the counterweight 50 can be moved up and down in the elevator shaft 10.

With continued reference to fig. 2, preferably, two car diverting pulleys 90 are provided, and the two car diverting pulleys 90 are disposed at a distance from each other at the bottom of the car 40. The two car diversion sheaves 90 are in stable contact with the hoisting ropes 80, so that the car 40 can be uniformly stressed, the car 40 can be kept in a horizontal posture, and the riding comfort of passengers is improved.

As described in the above solution, the top hanging wheel is set as the car side top hanging wheel 110 or the counterweight side top hanging wheel 120; when the top hanging wheel is set as the car side top hanging wheel 110, the car side top hanging wheel 110 is set between the car 40 and the pit diversion sheave 20, the traction machine 30 is set between the pit diversion sheave 20 and the counterweight 50, when the top hanging wheel is set as the counterweight side top hanging wheel 120, the traction machine 30 is set between the car 40 and the pit diversion sheave 20, and the counterweight side top hanging wheel 120 is set between the pit diversion sheave 20 and the counterweight 50.

The car-side top hanging sheave 110 is connected to the hoist rope 80 in a winding manner, so that the power of the hoist sheave 31 is transmitted to the car 40 to drive the car 40 to move up and down. The counterweight-side top hanging sheave 120 is connected to the hoist rope 80 in a winding manner, so that the power of the hoist sheave 31 is transmitted to the counterweight 50, and the counterweight 50 is driven to move up and down.

Alternatively, the hoist rope 80 is a wire rope. The steel wire rope has high strength, good wear resistance and good durability.

In addition, as shown in fig. 6, the present application further provides a method for modifying an elevator without a machine room, which includes the following steps:

s100: the top hanging sheave at the top of the elevator shaft 10 is removed and a new traction machine 30 is installed at the original position of the top hanging sheave.

S200: the old machine 30 of the hoistway pit 12 is removed and the overhead sheave is mounted to the hoistway pit 12 to form a pit transfer sheave 20.

In addition, a new traction machine 30 and a pit diverting pulley 20 are respectively reinstalled at the original positions, and the original other elevator components are not required to be disassembled and replaced and still can be reserved for a new machine room-free motor, so that the reconstruction cost can be greatly reduced, and the resource consumption is saved.

Further, in the step of removing the top hanging sheave at the top of the elevator shaft 10 and attaching the new hoisting machine 30 to the original position of the top hanging sheave, the new hoisting machine 30 is attached to the top hanging sheave 60 at the top of the elevator shaft 10, or a fixed base is attached to the shaft top 11 and the new hoisting machine 30 is attached to the fixed base. The hoisting machine 30 can be effectively and firmly attached to the top hanger 60 or to the fixing base.

In the step of removing the top hanging sheave at the top of the elevator shaft 10 and installing the new hoisting machine 30 at the original position of the top hanging sheave, when the pit transfer sheave 20 is provided as the counter-weight top hanging sheave 120, the wheel axis of the traction sheave 31 of the new hoisting machine 30 is arranged at an angle to the width direction of the car 40. This can help to reduce wear between the traction sheave 31 and the hoist rope 80.

Alternatively, in the step of removing the overhead sheave at the top of the elevator shaft 10 and installing the new hoisting machine 30 at the original position of the overhead sheave, when the pit transfer sheave 20 is provided as the car-side overhead sheave 110, the wheel axis of the traction sheave 31 of the new hoisting machine 30 is arranged perpendicular to the longitudinal direction of the car 40. Therefore, the hoisting rope 80 can be prevented from generating bending torque, the stable rotation is ensured, and the hoisting rope 80 is prevented from being easily broken due to overlarge stress.

In the step of removing the overhead sheave at the top of the elevator shaft 10 and attaching the new hoisting machine 30 to the existing position of the overhead sheave, the projection of the new hoisting machine 30 on the shaft pit 12 does not coincide with the projection of the car 40 on the shaft pit 12. In this way, the newly installed hoisting machine 30 does not cause collision interference with the elevator car 40 that is moving up and down, and the potential safety hazard that the elevator car 40 collides with the hoisting machine 30 when the hoisting machine 30 is placed in the original hoistway pit 12 can be fundamentally eliminated.

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.

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", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance 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.

Claims

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

2. The machine room-less elevator rebuilding method according to claim 1, wherein in the step of removing a top hanging sheave at the top of an elevator shaft and installing a new traction machine at an original position of the top hanging sheave, the new traction machine is installed on a top hanging sheave at the top of the elevator shaft, or a fixed base is installed at the top of the elevator shaft and the new traction machine is installed on the fixed base.

3. The method for modifying an elevator without a machine room according to claim 1, wherein in the step of removing the top hanging sheave at the top of the elevator shaft and installing the new traction machine at the original position of the top hanging sheave, when the pit diverting pulley is set as the counter-weight side top hanging sheave, a wheel axis of a traction sheave of the new traction machine is arranged at an angle to a width direction of the car.

4. The method of modifying an elevator without a machine room according to claim 1, wherein in the step of removing a top hanging sheave at a top of an elevator shaft and installing a new traction machine at an original position of the top hanging sheave, when the pit diverting sheave is set as a car-side top hanging sheave, a wheel axis of a traction sheave of the new traction machine is arranged perpendicular to a length direction of the car.

5. The machine room-less elevator rebuilding method according to claim 1, wherein in the step of removing a top hanging sheave at the top of the elevator shaft and installing a new traction machine at an original position of the top hanging sheave, a projection of the new traction machine on the shaft pit is not coincident with a projection of the car on the shaft pit.

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

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

a pit diverting pulley disposed in the hoistway pit;

the traction machine is arranged at the top of the well, and the installation position of the traction machine is set as the original position of the pit diversion sheave; and

car, rope sheave subassembly and to heavy, the wheel axis of the driving sheave of hauler with the width direction of car is the contained angle and arranges, the rope sheave subassembly set up in the elevator well and with the hauler drive connection, the car with to the weight average with rope sheave subassembly swing joint can be in lift movement in the elevator well, pit diversion sheave with rope sheave subassembly swing joint.

7. The machine roomless elevator according to claim 6, wherein a top hanger is provided at a top of the hoistway, and the traction machine is provided on the top hanger.

8. The machine roomless elevator of claim 6, wherein a projection of the hoisting machine on the hoistway pit is not coincident with a projection of the car on the hoistway pit.

9. The machine roomless elevator of claim 6, further comprising a pit base disposed on the hoistway pit, the pit return sheave being disposed on the pit base.

10. The machine room-less elevator according to claim 6, wherein the sheave assembly includes a traction rope, a car diverting sheave, a top hanging sheave and a counterweight diverting sheave, the car diverting sheave is disposed at the bottom of the car, the top hanging sheave is disposed at the top of the hoistway, the counterweight diverting sheave is disposed on the counterweight, the traction machine is provided with a traction sheave, the traction rope is wound on the car diverting sheave, the top hanging sheave, the traction sheave, the pit diverting sheave and the counterweight diverting sheave, and both ends of the traction rope 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 fixedly mounted at the top of the elevator hoistway.