CN114873416A - Friction type lifting system - Google Patents

Friction type lifting system Download PDF

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Publication number
CN114873416A
CN114873416A CN202210461743.3A CN202210461743A CN114873416A CN 114873416 A CN114873416 A CN 114873416A CN 202210461743 A CN202210461743 A CN 202210461743A CN 114873416 A CN114873416 A CN 114873416A
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CN
China
Prior art keywords
pulley
fixed
movable pulley
movable
traction medium
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Pending
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CN202210461743.3A
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Chinese (zh)
Inventor
徐云彻
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Individual
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Individual
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Application filed by Individual filed Critical Individual
Priority to CN202210461743.3A priority Critical patent/CN114873416A/en
Publication of CN114873416A publication Critical patent/CN114873416A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
    • B66B11/0065—Roping
    • B66B11/008—Roping with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/02—Guideways; Guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/06—Arrangements of ropes or cables
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies

Abstract

The friction type lifting system comprises a lift car, a top pulley block, a driving host, a bottom pulley block, a traction medium, a movable pulley fixed support and a movable pulley block, wherein the lift car, the top pulley block, the driving host, the bottom pulley block, the traction medium, the movable pulley fixed support and the movable pulley block are arranged in a hoistway; the elevator car is provided with an elevator car pulley, the top pulley block is arranged at the top of the hoistway, the driving host and the bottom pulley are arranged at the bottom of the hoistway, and the driving host is provided with a driving wheel; the movable pulley fixed support can be arranged between the top pulley block and the bottom pulley block in a vertically movable manner, a movable pulley block is arranged in the movable pulley fixed support, and the movable pulley block comprises a first movable pulley, a second movable pulley and a third movable pulley; the upper end of the dragging medium sequentially rounds the first movable pulley, the top pulley block, the car pulley, the bottom pulley, the second movable pulley, the driving wheel and the third movable pulley downwards, and then the lower end of the dragging medium is fixed on a tensioning spring at the bottom of the hoistway. The load is lifted by the friction force between the driving wheel and the traction medium, and the rope winding ratio of the traction medium is adjusted, so that the long-stroke lifting of the load can be realized.

Description

Friction type lifting system
Technical Field
The invention relates to the field of vertical lifting equipment for people and goods, in particular to a friction type lifting system.
Background
The main ways for lifting people and goods, which are common in the market at present, are as follows: 1. the friction between the driving wheels and the ropes/belts is used to lift loads, more commonly traction-type lifting devices with counterweight, such as the common vertical lift elevators. 2. The load is lifted by the continuous winding of the rope/belt on the drive wheel, e.g. a winch. 3. The load is lifted by direct mechanical contact transmission, such as a rack and pinion hoist, a lead screw nut lifting platform, and the like. 4. Lifting devices that use compression of a specific physical medium (air, water/oil, etc. liquid) to do work, such as lifting platforms with cylinders and cylinders as the driving components, etc. 5. A lifting device of a linear motor using an electromagnetic principle.
However, the main problems of the above lifting methods are as follows: the elevator type lifting device of 1 needs a balance weight and a space for running the balance weight, and the utilization rate of the running space is low. 2. 3, 4, the self structural limitation of the structure has certain use limitation on the lifting height. The lifting device of the linear motor type 5 has no problems, but has a complicated technique and high practical application cost.
In order to solve the above problems, there are some patent applications in the prior art, which mainly include the following: 1. the patent application with publication number CN108996373 discloses a compact shallow pit counterweight-free elevator, which is a counterweight-free elevator technology, and adopts a hoisting structure with a driving main machine arranged on the top, and has the main disadvantages that: 1. because only two steel wire ropes are adopted to directly lift the load, the liftable load is small; 2. the lifting height is limited due to the adoption of a hoisting structure. 2. The patent application with publication number CN105398919A discloses a traction structure of a lower driving type elevator without counterweight, which adopts the way of placing a main machine at the bottom and arranging a ratchet wheel on a driving wheel, solves the problem of lifting a heavy load by increasing the rope winding ratio, but still adopts the way of continuously winding the motor-driven wheel, so that the lifting height is limited. 3. Patent application No. CN102112385A discloses a counterweightless elevator, which must use a bottom tension device to solve the elongation of the suspension device, but in practical use, the working range of the tension device has a certain limitation, and regular maintenance and adjustment are required, and the structure of the invention is not suitable for large loads. 4. Publication No. CN1906110A discloses a counterweightless elevator apparatus, which uses a driving wheel disposed at the top and a return pulley disposed at the bottom to wind a main rope around the driving wheel and the return pulley, and the main rope is fixed at the upper and lower parts of a car respectively, and directly lifts the load of the car by friction force.
In view of the above, the present inventors have made extensive studies on the above-mentioned drawbacks of the prior art, and have made this invention.
Disclosure of Invention
In order to solve the technical problem, a friction type lifting system is provided, the arrangement mode of pulleys is reasonably designed, the extension of a traction medium is automatically compensated by utilizing the gravity of a lifting load, manual adjustment is not needed, and long-stroke lifting of the load can be realized by adjusting different rope winding ratios of the traction medium.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a friction type lifting system comprises a lift car, a top pulley block, a driving host, a bottom pulley block, a traction medium, a bottom tension spring, a top tension spring, a movable pulley fixed support and a movable pulley block, wherein the lift car, the top pulley block, the driving host, the bottom pulley block, the traction medium, the bottom tension spring, the top tension spring, the movable pulley fixed support and the movable pulley block are arranged in a hoistway; a safety gear device for acting in overspeed is arranged on the car, a car pulley is fixed on the car, and the car can move up and down along a fixed guide rail; the top pulley block is arranged at the top of the hoistway and comprises a first top fixed pulley, a second top fixed pulley and a third top fixed pulley; the driving main machine is arranged at the bottom of the well and is connected with a driving wheel; a bottom pulley block is further arranged at the bottom of the shaft, and a first bottom fixed pulley and a second bottom fixed pulley are arranged in the bottom pulley block; the movable pulley fixing support is arranged between the top pulley block and the bottom pulley block and can move up and down, a movable pulley block is arranged in the movable pulley fixing support, and the movable pulley block comprises a first movable pulley, a second movable pulley and a third movable pulley;
the upper end of the traction medium is fixed on a top tension spring, the top tension spring is fixed close to the top of the hoistway, the upper end of the traction medium sequentially passes through a first movable pulley, a first top fixed pulley, a car pulley, a second top fixed pulley, a third top fixed pulley, a first bottom fixed pulley, a second movable pulley, a driving wheel and a third movable pulley downwards, and then the lower end of the traction medium is fixed on the bottom tension spring, and the bottom tension spring is fixed close to the bottom of the hoistway;
when the lift car needs to descend, the driving host drives the driving wheel to rotate anticlockwise, the movable pulley fixing support is pulled to move downwards by the traction medium which winds around the third movable pulley and the second movable pulley, the traction medium which winds on the traction medium winds to the top of the lift well through the first bottom fixed pulley and the second bottom fixed pulley at the bottom of the lift well, the traction medium is guided to the lift car pulley through the second top fixed pulley and the third top fixed pulley which are fixed at the top of the lift well, the traction medium winds to the lift car pulley and then reversely turns to the first movable pulley in the movable pulley fixing support through the first top fixed pulley fixed at the top of the lift car, and the traction medium winds to the first movable pulley and then is fixed through the top tension spring at the top of the lift well.
Preferably, the top tension spring is fixed at the top of the hoistway through a top fixed rope hitch plate; the bottom tension spring is fixed at the bottom of the well through a bottom fixed rope hitch plate.
Preferably, a brake is arranged on the driving wheel.
Preferably, the car is provided with a safety device for preventing falling, and the safety device is triggered by an independent detection device.
Preferably, the well lateral wall is equipped with the rigid guide rail that has the direction function, the car moves from top to bottom along the rigid guide rail.
Preferably, the diameters of the first movable pulley, the second movable pulley and the third movable pulley in the movable pulley fixing support are different.
Preferably, a fourth movable pulley and a fifth movable pulley are further arranged in the movable pulley fixing support.
Preferably, the driving host can directly drive the driving wheel or drive the driving wheel through the reduction gearbox.
Preferably, the traction medium is a steel belt or a steel wire rope coated with a friction material to increase a friction coefficient.
Through the technical scheme, the traction medium of the friction type lifting system is tensioned through the self weight of the lift car, the running direction of the movable pulley fixed support is consistent with the running direction of the lift car, and the speed ratio formed by the second movable pulley and the third movable pulley fixed on the movable pulley fixed support is utilized, so that a larger load can be driven by a smaller friction force on the driving wheel. Through the arrangement of each pulley, the friction force generated by the driving wheel and the traction medium in contact with the driving wheel is utilized to lift the load, the self weight of the load is utilized to tension the traction medium, and the traction medium is not required to be tensioned and adjusted by a special counterweight.
Compared with the prior art, the invention has the following advantages:
1. the traction medium can be automatically compensated by the gravity of the lifting load without manual adjustment, and the traction medium can be tensioned by the gravity of the lifting load without regular or irregular adjustment.
2. The arrangement mode of each pulley is reasonably designed, and the lifted load can be correspondingly increased by increasing the number of the movable pulleys.
3. Because the friction type transmission is adopted, the lifting height is not limited, and the long-stroke lifting of the load can be realized by adjusting different rope winding ratios of the traction medium.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a friction type lifting system disclosed in embodiment 1 of the present invention;
fig. 2 is a schematic diagram of a friction type lifting system according to embodiment 1 of the present invention after a movable pulley is added;
fig. 3 is a schematic structural view of a friction type elevator disclosed in embodiment 2 of the present invention;
fig. 4 is a schematic view of an installation structure of a friction type elevator driving system disclosed in embodiment 2 of the present invention;
fig. 5 is a side view of a friction-type hoisting elevator disclosed in embodiment 2 of this invention at the top pulley sheave bracket;
fig. 6 is a top cross-sectional view of a friction-type hoisting elevator at the top diverting sheave bracket according to embodiment 2 of the present invention;
fig. 7 is a side view of a friction-type hoisting elevator disclosed in embodiment 2 of the present invention at a main machine frame;
fig. 8 is a front sectional view of a friction-type elevator disclosed in embodiment 2 of the present invention at a main machine frame;
fig. 9 is a side view of a car frame in a friction type elevator disclosed in embodiment 2 of the present invention;
fig. 10 is a front view of an intermediate frame of a friction type elevator according to embodiment 2 of the present invention.
The corresponding part names indicated by the numbers and letters in the drawings:
1. the elevator car 2, the top pulley bracket 21, the first top fixed pulley 22, the second top fixed pulley 23, the third top fixed pulley 201, the first top pulley 202, the second top pulley 203, the third top pulley 204, the fourth top pulley 3, the driving main machine 31, the driving wheel 4, the bottom pulley 41, the first bottom fixed pulley 42, the second bottom fixed pulley 5, the traction medium 51, the upper rope head 52, the lower rope head 6, the bottom tension spring 61, the bottom fixed rope head plate 7, the top tension spring 71, the top fixed rope head plate 8, the movable pulley fixed support 91, the first movable pulley 92, the second movable pulley 93, the third movable pulley 94, the fourth movable pulley 95, the fifth movable pulley 10, the hoistway 11, the car frame 12, the car frame 13, the safety clamp device 14, the safety clamp device 15, the main machine bracket 16 and the car pulley bracket 16.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention will be described in further detail with reference to examples and specific embodiments.
Example 1.
As shown in fig. 1 and 2, a friction type lifting system includes a car 1, a top pulley block, a driving main machine 3, a bottom pulley block, a traction medium 5, a bottom tension spring 6, a top tension spring 7, a movable pulley fixing support 8 and a movable pulley block, which are arranged in a hoistway; a safety gear device for acting in overspeed is arranged on the car 1, a car pulley 11 is fixed on the car 1, and the car 1 can move up and down along a fixed guide rail; the top pulley block is arranged at the top of the hoistway and comprises a first top fixed pulley 21, a second top fixed pulley 22 and a third top fixed pulley 23; the driving main machine 3 is arranged at the bottom of the well, and the driving main machine 3 is connected with a driving wheel 31; a bottom pulley block is further arranged at the bottom of the hoistway, and a first bottom fixed pulley 41 and a second bottom fixed pulley 42 are arranged in the bottom pulley block; the movable pulley fixing support 8 is arranged between the top pulley block and the bottom pulley block and can move up and down, a movable pulley block is arranged inside the movable pulley fixing support 8, and the movable pulley block comprises a first movable pulley 91, a second movable pulley 92 and a third movable pulley 93;
the upper end of the traction medium 5 is fixed on a top tension spring 7, the top tension spring 7 is fixed close to the top of the hoistway, the upper end of the traction medium 5 downwards sequentially passes through a first movable pulley 91, a first top fixed pulley 21, a car pulley 11, a second top fixed pulley 22, a third top fixed pulley 23, a first bottom fixed pulley 41, a second bottom fixed pulley 42, a second movable pulley 92, a driving wheel 31 and a third movable pulley 93, and then the lower end of the traction medium 5 is fixed on a bottom tension spring 6, and the bottom tension spring 6 is fixed close to the bottom of the hoistway;
when the car 1 needs to descend, the driving host machine 3 drives the driving wheel 31 to rotate anticlockwise, the movable pulley fixing support 8 is pulled to move downwards by the traction medium 5 bypassing the third movable pulley 93 and the second movable pulley 92, the traction medium 5 wound on the traction medium is wound on the top of the hoistway through the first bottom fixed pulley 41 and the second bottom fixed pulley 42 at the bottom of the hoistway, the traction medium 5 is guided to the car pulley 11 through the second top fixed pulley 22 and the third top fixed pulley 23 fixed at the top of the hoistway, the traction medium 5 bypasses the car pulley 11, then reversely goes back to the first movable pulley 91 in the movable pulley fixing support 8 through the first top fixed pulley 21 fixed at the top of the car 1, and then the traction medium is fixed through the top tension spring 7 at the top of the hoistway after bypassing the first movable pulley 91.
When the car 1 needs to be lifted, the driving main machine 3 drives the driving wheel 31 to rotate clockwise, and the moving parts and the rotating parts move and rotate in opposite directions to complete lifting of the car.
The top tension spring 7 is fixed at the top of the hoistway through a top fixed rope hitch plate 71; the bottom tension spring 6 is fixed at the bottom of the hoistway through a bottom fixed rope hitch plate 61. In order to enhance the braking effect, the driving wheel 31 is provided with a brake. The car 1 is provided with a safety device for preventing falling, and the safety device is triggered by an independent detection device to improve safety. In order to make car even running, can not rock during the operation, the well lateral wall is equipped with the rigid guide rail that has the direction function, car 1 moves from top to bottom along the rigid guide rail.
Meanwhile, in order to adjust different winding ratios of the traction medium 5 to realize a long stroke lift of the car 1, diameters of the first movable pulley 91, the second movable pulley 92 and the third movable pulley 93 in the movable pulley fixing support 8 are different in size.
Referring to fig. 2 again, of course, according to the actual requirement of the lift of the car 1, a fourth movable pulley 94 and a fifth movable pulley 95 may be added to the number of the pulleys in the movable pulley fixing support 8.
In practical application, the driving main machine 3 can directly drive the driving wheel 31 or drive the driving wheel 31 through a reduction gearbox, and can be driven by other power, such as hydraulic equipment, pneumatic equipment and the like. The traction medium 5 used is a steel belt or a steel wire rope coated with a friction material to increase the friction coefficient.
In this example, the traction medium 5 of the friction type hoisting system is tensioned by the self weight of the car 1, the running direction of the movable pulley fixed support 8 is consistent with the running direction of the car 1, and the invention utilizes the speed ratio formed by the second movable pulley 92 and the third movable pulley 93 fixed on the movable pulley fixed support 8, so that a larger load can be driven by a smaller friction force on the driving wheel 31. Through the arrangement of the pulleys, the friction force generated by the driving wheel 31 and the traction medium contacted with the driving wheel is utilized to lift the load, the self weight of the load is utilized to tension the traction medium, and the traction medium 5 does not need to be tensioned and adjusted by a special counterweight.
Example 2.
The practical application of the invention in elevator technology is explained in further detail below, and the technical scheme in specific application is as follows:
as shown in fig. 3-10, a friction type elevator comprises a car 1, a top rope pulley support 2, a top rope pulley set, a driving main machine 3, a bottom rope pulley 4, a traction medium 5, a main machine support 15, a bottom tension spring 6, a top tension spring 7, a movable pulley fixing support 8 and a movable pulley set, all of which are arranged in a hoistway 10; the lower part and the inner side of the car 1 are connected with a car frame 12, two sides of the lower part of the inner side of the car frame 12 are provided with safety gear devices 13 used for acting during overspeed, the top of the car 1 is fixed with a car diversion sheave 16, and the car frame 12 can move up and down along a guide rail 14 fixed on the inner side wall of the hoistway 10; the top diverting pulley group is disposed at the top of the hoistway 10, and includes a first top diverting pulley 201, a second top diverting pulley 202, a third top diverting pulley 203, and a fourth top diverting pulley 204; the main machine support 15 is arranged at the bottom of the hoistway 10, the driving main machine 3 is arranged in the main machine support 15, and the driving wheel 31 is connected to the driving main machine 3; the bottom side wall of the well 10 is also provided with a bottom diversion sheave 4; the movable pulley fixing support 8 is arranged between the top rope pulley group and the bottom rope pulley 4 in a manner of moving up and down, a movable pulley block is arranged inside the movable pulley fixing support 8, and the movable pulley block comprises a first movable pulley 91, a second movable pulley 92 and a third movable pulley 93;
the upper rope head 51 at the top end of the traction medium 5 is fixed at the inner side of the bottom of the top rope pulley support 2 through a fixed rod and a top tension spring 7, the top tension spring 7 is fixed close to the top of the hoistway 10, the upper rope head 51 of the traction medium 5 sequentially passes through a first movable pulley 91, a first top rope pulley 201, a second top rope pulley 202, a car rope pulley 16, a third top rope pulley 203, a fourth top rope pulley 204, a bottom rope pulley 4, a second movable pulley 92, a driving wheel 31 and a third movable pulley 93 downwards, then the lower rope head 52 at the bottom end of the traction medium 5 is fixed on the bottom tension spring 6 through a connecting rod, and the bottom tension spring 6 is fixed at the top of the outer end of the main machine support 15;
when the car 1 needs to descend, the driving main machine 3 drives the driving wheel 31 to rotate anticlockwise. The movable sheave fixing bracket 8 is pulled to run downward by the traction medium 5 passing around the third movable sheave 93 and the second movable sheave 92, and the traction medium 5 wound thereon is wound to the top of the hoistway by the bottom diverting sheave 4 at the bottom of the hoistway 10. The traction medium 5 is guided to the car pulley 16 through a third top pulley 203 and a fourth top pulley 204 fixed on the top of the hoistway 10, passes through a first top pulley 201 and a second top pulley 202 fixed on the top of the car 1 after bypassing the car pulley 16, is reversed to the first movable pulley 91 in the movable pulley fixing support 8, passes through the first movable pulley 91, and is fixed by a fixing rod and a top tension spring 7 after passing through the upper rope head 51. Since the top tension spring 7 is fixed to the inside of the bottom of the top sheave bracket 2 and the top sheave bracket 2 is fixed to the top of the hoistway 10, the upper head 51 of the hoisting medium 5 is also fixed to the top of the hoistway.
When the car 1 needs to be lifted, the driving main machine 3 drives the driving wheel 31 to rotate clockwise, and the moving parts and the rotating parts move and rotate in opposite directions to complete lifting of the car.
In this example, the traction medium 5 of the friction type elevator is tensioned by the self weight of the car 1, the running direction of the movable pulley fixed support 8 is consistent with the running direction of the car 1, and the invention utilizes the speed ratio formed by the second movable pulley 92 and the third movable pulley 93 fixed on the movable pulley fixed support 8, so that a larger load can be driven by a smaller friction force on the driving wheel 31. Through the arrangement of the pulleys, the friction force generated by the driving wheel 31 and the traction medium contacted with the driving wheel is utilized to lift the load, the self weight of the load is utilized to tension the traction medium, and the traction medium 5 does not need to be tensioned and adjusted by a special counterweight.
As can be seen from the above embodiments, compared to the prior art, the present invention automatically compensates for the elongation of the traction medium by using the gravity of the lifted load without manual adjustment, and tensions the traction medium by using the gravity of the load without regular or irregular adjustment. Meanwhile, the arrangement mode of each pulley is reasonably designed, and the number of the movable pulleys is increased, so that the lifting load can be correspondingly increased. In addition, the invention adopts friction type transmission, the lifting height is not limited, and the long-stroke lifting of the load can be realized by adjusting different rope winding ratios of the traction medium.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims (9)

1. A friction type lifting system is characterized by comprising a lift car, a top pulley block, a driving host, a bottom pulley block, a traction medium, a bottom tension spring, a top tension spring, a movable pulley fixed support and a movable pulley block, wherein the lift car, the top pulley block, the driving host, the bottom pulley block, the traction medium, the bottom tension spring, the top tension spring, the movable pulley fixed support and the movable pulley block are arranged in a hoistway; a safety gear device which acts when overspeed is installed on the cage, a cage pulley is fixed on the cage, and the cage can move up and down along a fixed guide rail; the top pulley block is arranged at the top of the hoistway and comprises a first top fixed pulley, a second top fixed pulley and a third top fixed pulley; the driving main machine is arranged at the bottom of the well and is connected with a driving wheel; a bottom pulley block is further arranged at the bottom of the shaft, and a first bottom fixed pulley and a second bottom fixed pulley are arranged in the bottom pulley block; the movable pulley fixing support is arranged between the top pulley block and the bottom pulley block and can move up and down, a movable pulley block is arranged in the movable pulley fixing support, and the movable pulley block comprises a first movable pulley, a second movable pulley and a third movable pulley;
the upper end of the traction medium is fixed on a top tension spring, the top tension spring is fixed close to the top of the hoistway, the upper end of the traction medium sequentially passes through a first movable pulley, a first top fixed pulley, a car pulley, a second top fixed pulley, a third top fixed pulley, a first bottom fixed pulley, a second movable pulley, a driving wheel and a third movable pulley downwards, and then the lower end of the traction medium is fixed on the bottom tension spring, and the bottom tension spring is fixed close to the bottom of the hoistway;
when the lift car needs to descend, the driving host drives the driving wheel to rotate anticlockwise, the movable pulley fixing support is pulled to move downwards by the traction medium which winds around the third movable pulley and the second movable pulley, the traction medium which winds on the traction medium winds to the top of the lift well through the first bottom fixed pulley and the second bottom fixed pulley at the bottom of the lift well, the traction medium is guided to the lift car pulley through the second top fixed pulley and the third top fixed pulley which are fixed at the top of the lift well, the traction medium winds to the lift car pulley and then reversely turns to the first movable pulley in the movable pulley fixing support through the first top fixed pulley fixed at the top of the lift car, and the traction medium winds to the first movable pulley and then is fixed through the top tension spring at the top of the lift well.
2. A friction lifting system as claimed in claim 1 wherein said top tension spring is secured to the top of the hoistway by a top fixed rope hitch plate; the bottom tension spring is fixed at the bottom of the well through a bottom fixed rope hitch plate.
3. A friction lifting system as claimed in claim 2 wherein a brake is provided on the drive wheel.
4. A friction lifting system as claimed in claim 3 wherein the car has safety means mounted thereon for preventing fall, said safety means being triggered by a separate sensing means.
5. A friction lifting system as claimed in claim 4 wherein said hoistway walls are provided with rigid guide rails having guiding functions, said car travelling up and down said rigid guide rails.
6. A friction lifting system according to claim 5 wherein the diameters of the first, second and third movable pulleys in the movable pulley fixed support are different.
7. A friction lifting system according to claim 6 wherein said movable sheave fixed support has fourth and fifth movable sheaves disposed therein.
8. A friction lifting system according to claim 7 wherein the drive main unit can drive the drive wheel directly or via a reduction gearbox.
9. A friction lifting system as defined in claim 8 wherein the traction medium is steel belt or steel rope coated with friction material to increase the coefficient of friction.
CN202210461743.3A 2022-04-28 2022-04-28 Friction type lifting system Pending CN114873416A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210461743.3A CN114873416A (en) 2022-04-28 2022-04-28 Friction type lifting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210461743.3A CN114873416A (en) 2022-04-28 2022-04-28 Friction type lifting system

Publications (1)

Publication Number Publication Date
CN114873416A true CN114873416A (en) 2022-08-09

Family

ID=82672197

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210461743.3A Pending CN114873416A (en) 2022-04-28 2022-04-28 Friction type lifting system

Country Status (1)

Country Link
CN (1) CN114873416A (en)

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