Elevator pulley bushing, elevator pulley assembly, and elevator system

Abstract

The invention discloses an elevator pulley bushing, an elevator pulley assembly and an elevator system. The elevator pulley bushing comprises two or more combinable sections, the combinable sections are arranged on an elevator pulley in a combined mode to form the elevator pulley bushing to be connected with an elevator stretching component, and the bottom of at least one combinable section is provided with a first concave-convex structure in the transverse direction. The first concave-convex structure is matched with a second concave-convex structure arranged on the peripheral face of the elevator pulley in the transverse direction so as to be correspondingly connected when the at least one combinable section is arranged on the elevator pulley. The elevator pulley bush has the advantages of being simple in structure, high in reliability, convenient to install, replace, maintain and operate and the like, and can be reliably connected with an elevator pulley without being prone to moving or falling off.

Description

Technical Field

[0001] This disclosure relates to the field of elevator technology, and more specifically, to elevator pulley bushings, elevator pulley assemblies, and elevator systems. Background Technology

[0002] Elevator systems typically include power units such as traction machines and winches to provide power for system operation. When elevator pulleys (such as traction pulleys) are driven to rotate, the power is transmitted to the elevator tensioning components mounted on the pulleys, causing the latter to move. This, in turn, moves the elevator car and / or counterweight connected to the elevator tensioning components along the elevator shaft. Typically, elevator pulleys are fitted with bushings to increase friction, reduce wear between components, and extend component lifespan. This application's research has found that existing elevator pulley bushings require improvement in terms of structure, performance, installation and replacement maintenance, and manufacturing costs. Summary of the Invention

[0003] In view of this, the present disclosure provides elevator pulley bushings, elevator pulley assemblies and elevator systems to solve or at least alleviate one or more of the above-mentioned problems and other problems existing in the prior art, or to provide alternative solutions to the prior art.

[0004] First, according to one aspect of this disclosure, an elevator pulley bushing is provided, the elevator pulley bushing comprising two or more combinable sections, the combinable sections being assembled onto an elevator pulley to form an elevator pulley bushing for engagement with an elevator tensioning component, wherein at least one combinable section has a first convex-concave structure laterally disposed at its bottom, the first convex-concave structure matching a second convex-concave structure laterally disposed on the outer circumferential surface of the elevator pulley for corresponding engagement when the at least one combinable section is disposed onto the elevator pulley.

[0005] In the elevator pulley bushing according to the present disclosure, optionally, the combinable section has a first end and a second end opposite to each other along the circumference of the elevator pulley, the first convex-concave structure is disposed at a position between the first end and the second end, and / or a portion of the first convex-concave structure is disposed on the first end or the second end, and another portion of the first convex-concave structure is disposed on the corresponding end of another combinable section adjacent to the combinable section.

[0006] In the elevator pulley bushing according to the present disclosure, optionally, the first concave-convex structure includes at least one groove disposed along the axial direction of the elevator pulley, and the second concave-convex structure includes at least one protrusion disposed along the axial direction of the elevator pulley.

[0007] In the elevator pulley bushing according to this disclosure, optionally, the combinable section is configured to have:

[0008] A first side end and a second side end, which are opposite each other along the axial direction of the elevator pulley, the first side end being configured to be installed in place after abutting against a first mounting portion on the elevator pulley, and the second side end being configured to engage with a second mounting portion on the elevator pulley during installation; and

[0009] A protrusion is disposed between the first side end and the second side end and configured to be mounted into a circumferentially arranged groove on the elevator pulley.

[0010] In the elevator pulley bushing according to the present disclosure, optionally, the second mounting portion is disposed at the outer end of the elevator pulley, and the second side end is configured to extend radially outward along the elevator pulley and extend beyond the groove after installation, so as to disengage the combinable section from the groove by applying a force to the second side end, thereby removing the combinable section from the elevator pulley.

[0011] In the elevator pulley bushing according to this disclosure, optionally, the joint between two adjacent combinable sections of the elevator pulley bushing is constructed in a stepped shape, an arc shape, or a diagonal shape, wherein the angle formed between the diagonal line and the longitudinal section of the elevator pulley is less than 90° and not less than 10°.

[0012] Optionally, in the elevator pulley bushing according to the present disclosure, the combinable section is provided with an assembly portion for fastening the assembled elevator pulley bushing into place on the elevator pulley by installing fastening components in the assembly portion and providing force along the radial direction of the elevator pulley.

[0013] Secondly, this disclosure also provides an elevator pulley assembly, including:

[0014] Elevator pulley bushings as described in any of the above; and

[0015] An elevator pulley has a second concave-convex structure on its outer circumferential surface. The second concave-convex structure and the first concave-convex structure of the elevator pulley bushing are correspondingly engaged when the elevator pulley bushing is installed on the elevator pulley.

[0016] In the elevator pulley assembly according to this disclosure, the elevator pulley optionally includes a body and a bracket, the bracket being detachably mounted on the body and engaging with the elevator pulley bushing.

[0017] In the elevator pulley assembly according to this disclosure, optionally, the bracket has two or more assemblable bracket sections that are combined and arranged on the body.

[0018] In the elevator pulley assembly according to this disclosure, optionally, each of the assemblable bracket sections has a first portion and a second portion, the first portion having a groove for engaging with a protrusion on the assemblable section, and the second portion being connected to the first portion and extending radially toward the center of the elevator pulley.

[0019] In the elevator pulley assembly according to this disclosure, optionally, the number of the assembleable bracket sections is the same as the number of the combinable sections, and each pair of assembleable bracket sections and combinable sections is individually combined and then fixed to the body by mounting components.

[0020] In the elevator pulley assembly according to this disclosure, optionally, the elevator pulley bushing and the elevator pulley are also connected by adhesive.

[0021] Furthermore, according to another aspect of this disclosure, an elevator system is further provided, comprising:

[0022] A power unit, configured to provide power;

[0023] An elevator car, which, under the action of the aforementioned power, can move between elevator floors; and

[0024] An elevator tensioning component and an elevator pulley assembly as described in any of the above, wherein the elevator pulley is connected to the power output end of the power unit, and the elevator tensioning component engages with the elevator pulley bushing and is connected to the elevator car to transmit the power to the elevator car.

[0025] In the elevator system according to this disclosure, the power unit may optionally include a traction machine and a winch, and / or the elevator tensioning component may include a steel belt and a rope.

[0026] The elevator pulley bushing disclosed herein has advantages such as simple structure, stable performance, high reliability, and convenient installation, replacement, and maintenance. The elevator pulley bushing can be firmly engaged with the elevator pulley and is not prone to slippage, loosening, or falling off. Furthermore, even in the unfavorable situation where the elevator pulley bushing is completely worn out, the elevator traction requirements can be met using a reusable support structure. This not only significantly improves system safety but also helps extend the service life of elevator tensioning components and other parts, reduces system downtime, and lowers overall costs. Attached Figure Description

[0027] The technical solutions of this disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are intended to conceptually illustrate the structural construction described herein, and are not necessarily drawn to scale.

[0028] Figure 1 This is a three-dimensional structural schematic diagram of an example elevator system that can be adopted according to various embodiments of the present disclosure.

[0029] Figure 2 This is a three-dimensional structural diagram showing the matched and joined structure of a combinable section in an elevator pulley bushing embodiment and an assemblable bracket section in an elevator pulley embodiment, according to the present disclosure.

[0030] Figure 3 yes Figure 2 The diagram shows a side view of a pair of matched and joined combinable sections and an assemblable support section.

[0031] Figure 4 yes Figure 2 Enlarged front view schematic diagram of part A in the middle.

[0032] Figure 5 This is a partial side-section perspective view of an elevator pulley embodiment and an elevator tensioning component embodiment arranged in accordance with the present disclosure.

[0033] Figure 6 This is a three-dimensional structural diagram of an elevator pulley embodiment and an elevator tensioning component embodiment arranged in accordance with the present disclosure.

[0034] Figure 7 The diagram shows partial top views of the elevator pulley bushings according to the present disclosure after they are installed in one elevator pulley embodiment, according to four different embodiments. Detailed Implementation

[0035] Figure 1 This is a perspective view of an elevator system 100, which may include an elevator car 103, a counterweight 105, a tensioning member 107, guide rails (or track system) 109, a machine unit (or machine unit system) 111, a position reference system 113, and an electronic elevator controller (controller) 115. The elevator car 103 and the counterweight 105 are connected to each other via the tensioning member 107. The tensioning member 107 may include or be configured as, for example, a steel belt (such as a coated steel belt) and / or ropes (such as wire ropes). The counterweight 105 may be configured to balance the load of the elevator car 103 and may be configured to facilitate simultaneous and opposite movement of the elevator car 103 relative to the counterweight 105 within the elevator shaft 117 and along the guide rails 109.

[0036] Tensioning component 107 engages unit 111, which is part of the overhead structure of elevator system 100. Unit 111 can be configured to control movement between elevator car 103 and counterweight 105. Position reference system 113 can be mounted on a fixed portion at the top of elevator shaft 117, such as on a support rod or guide rail, and can be configured to provide a position signal relating to the position of elevator car 103 within elevator shaft 117. In other embodiments, position reference system 113 can be directly mounted to a moving component of unit 111, or can be located in other locations and / or configurations as known in the art. Position reference system 113 can be any device or mechanism known in the art for monitoring the position of elevator car and / or counterweight. For example, but not limited to, position reference system 113 can be an encoder, sensor, or other system, and can include speed sensing, absolute position sensing, etc., as those skilled in the art will understand.

[0037] like Figure 1 As shown, controller 115 may be located in controller room 121 of elevator shaft 117 and may be configured to control the operation of elevator system 100 (and particularly elevator car 103). For example, controller 115 may provide drive signals to unit 111 to control the acceleration, deceleration, leveling, stopping, etc. of elevator car 103. Controller 115 may also be configured to receive position signals from position reference system 113 or any other desired position reference device. When moving up or down along guide rail 109 within elevator shaft 117, elevator car 103 may stop at one or more elevator landings 125 as controlled by controller 115, at which time passengers may enter or exit elevator car 103 through open elevator landing doors. Although controller 115 is shown in controller room 121, those skilled in the art will appreciate that controller 115 may be located and / or configured in other places or locations within elevator system 100. In one embodiment, the controller may be remotely located or located in the cloud.

[0038] Unit 111 may include a motor or similar power unit to provide operating power to elevator system 100. Such elevator power units are often referred to as traction machines, winches, etc. in practical applications. According to embodiments of this disclosure, unit 111 may be configured to include an electric drive motor. The power source for the motor can be any possible power source, such as the power grid, which may be combined with other components to supply power to the motor. Unit 111 may include, for example, an elevator pulley 20 serving as a traction pulley, through which force can be transmitted to tensioning member 107 to move elevator car 103 within elevator shaft 117 to reach the desired elevator landing 125.

[0039] This document shows and describes specific elevators and specific components. Figure 1 These are non-limiting examples presented merely for illustrative and explanatory purposes. It should be recognized that other elevator systems may be configured to use the elevator pulley bushings and elevator pulley assemblies disclosed herein. Furthermore, for the sake of simplicity in the drawings, identical or similar parts and features may be indicated only in one or more places in the same drawing. Technical terms such as "first," "second," etc., are used only for distinguishing purposes and are not intended to indicate their order or relative importance. The technical term "connection (or engagement)" includes connections (or engagements) achieved directly or indirectly.

[0040] refer to Figures 2 to 6 These accompanying drawings exemplify an embodiment of an elevator pulley bushing according to the present disclosure. The elevator pulley bushing 10 can be configured to have two, three, or more combinable sections 18, for example, in [the following context is missing from the original text]. Figure 2 The diagram illustrates one of the combinable sections that can be combined and arranged along the circumference of the pulley onto the elevator pulley 20 to form an elevator pulley bushing 10 for engagement with the elevator tensioning member 107. This allows the tensioning member 107 to drive the elevator car 103 along the guide rail 109 to reach the target floor under the power transmitted from the unit 111 via the elevator pulley 20.

[0041] The combinable section 18 can generally be made of one or more suitable materials such as rubber, which typically have good wear resistance. The bottom of one or more combinable sections 18 in the elevator pulley bushing 10 can be moved along the lateral direction (i.e., Figure 2 The combinable section width direction shown in the figure is provided with a concave-convex structure 17, which matches the concave-convex structure 24 correspondingly provided on the outer peripheral surface of the elevator pulley 20 and arranged in the transverse direction. Figure 2 The illustration shows only one section of the elevator pulley 20 as an example, so that when the elevator pulley bushing 10 is installed, the combinable section 18 can be securely set onto the elevator pulley 20 through the matching engagement between the above-mentioned concave and convex structures 17 and 24.

[0042] According to this disclosure, no restrictions are placed on the specific construction, arrangement, or quantity of the concave-convex structure 17 and the concave-convex structure 24. As used herein, in various embodiments, they can be like... Figure 2 and Figure 4As shown, the convex-concave structure 17 and convex-concave structure 24 are respectively configured as recesses and protrusions arranged laterally and matching each other. Of course, in another or some embodiments, it is also possible to configure the convex-concave structure 17 or convex-concave structure 24 to have one or more recesses and one or more protrusions simultaneously, as long as they can be correspondingly matched and engaged during installation. Furthermore, as an example, one or more convex-concave structures 17 can be arranged at any suitable position (e.g., a central position) between the ends 11 and 12 of the combinable section 18, or a portion of the convex-concave structure 17 (e.g., half or one-third of the recess) can be arranged on the end 11 or end 12, and another portion of the convex-concave structure 17 (e.g., the other half or two-thirds of the recess) can be arranged on the corresponding end of another combinable section 18 adjacent to the first combinable section 18. These situations have already been described. Figure 2 The diagram is shown in the image.

[0043] Continue to refer to Figure 2 and Figure 5 The combinable section 18 can be configured to have one or more protrusions 15 for corresponding fitting into the circumferentially arranged grooves 21 on the elevator pulley 20. Furthermore, the end 13 of the combinable section 18 facing inwards towards the elevator pulley 20 can be configured to abut against the mounting portion 22 on the elevator pulley 20 during installation, thereby securing it in place. The mounting portion 22 can optionally be configured to have a recessed structure for abutting and accommodating the aforementioned end 13 of the combinable section 18. Additionally, the inner wall of the mounting portion 22 can optionally be configured with an inclined angle to better abut against the corresponding portion of the end 13, thereby more securely and reliably fixing the combinable section 18 onto the elevator pulley 20. The end 14 of the combinable section 18 facing outward from the elevator pulley 20 can be configured to engage with the mounting portion 23 on the elevator pulley 20 during installation. For example, the mounting portion 23 can be located at the outer end of the elevator pulley 20 and optionally configured to have a protruding structure. A corresponding recessed structure provided on the end 14 of the combinable section 18 is used to form a mating connection with the protruding structure. Alternatively, the end 14 can be configured to extend radially outward along the elevator pulley 20 and beyond the groove 21. In this way, when needed, the protrusion 15 of the combinable section 18 can be disengaged from the corresponding groove 21 by applying force to the end 14 of the combinable section 18, thus making it very convenient, time-saving and labor-saving to remove the combinable section 18 from the elevator pulley 20.

[0044] By adopting the above arrangement according to the present disclosure, the combinable section 18 can not only form a reliable engagement between the circumferentially arranged protrusion 15 and the groove 21 of the elevator pulley bushing 10, but also form a reliable engagement between the transversely arranged concave-convex structure 17 and the concave-convex structure 24 of the elevator pulley bushing 10. This can significantly enhance the engagement performance between the elevator pulley bushing 10 and the elevator pulley 20, effectively preventing problems such as slippage, loosening or falling off of the elevator pulley bushing relative to the elevator pulley during use, and thus significantly improving the safety performance of the elevator system.

[0045] refer to Figure 6 and Figure 7 The illustrated embodiment demonstrates, by way of example, that the elevator pulley bushing 10 can be configured with six combinable sections 18. It should be noted that these sections may have the same or different structural configurations in terms of circumferential length, edge profile, material, and color selection. For example, two adjacent sections 18 of the elevator pulley bushing 10 can be configured into any suitable shape at the assembled joint 19, for instance... Figure 7 The diagrams show various seam configurations, including diagonal lines, stepped shapes, and arc shapes. Figure 7 (a) and Figure 7 (b) also demonstrates that such oblique lines can have different inclination directions relative to the axis of the elevator pulley 20. For example, as an alternative, the oblique line can be configured such that the included angle α between it and the longitudinal section of the elevator pulley 20 is greater than or equal to 10° and less than 90°. When the joint 19 between two adjacent combinable sections 18 has a joint configuration that is not parallel to the axis of the elevator pulley 20, this will create a contact time difference between the elevator tensioning member 107 and different joint parts, thus effectively reducing or avoiding adverse effects such as vibration and noise that may be caused when the elevator tensioning member 107 contacts the joint 19.

[0046] It should be understood that this disclosure allows for flexible configuration according to actual application needs regarding the specific number of blocks in the elevator pulley bushing 10, the configuration of individual blocks, and the matching settings between blocks, without imposing any restrictions.

[0047] In one or more embodiments, an assembly portion may be provided on the combinable section 18 to accommodate additional fastening components (not shown). By means of the installed fastening components, a force can be applied along the radial direction of the elevator pulley 20, thereby more reliably securing the assembled elevator pulley bushing 10 to the elevator pulley 20. The assembly portion of the combinable section 18 can be implemented in numerous feasible ways. For example, a groove can be provided on the top of the side end 14 of the combinable section 18 facing outwards from the elevator pulley 20. A fastening component, which can be configured in an annular shape, can then be placed into the groove, and its two ends can be fastened together using fasteners such as screws or bolts. This allows the fastening components to apply force to the elevator pulley bushing 10 and the elevator pulley 20, thus more securely assembling them together.

[0048] In addition, in one or more embodiments, adhesive can be used to bond the elevator pulley bushing 10 and the elevator pulley 20 together, which is also beneficial to form a more robust and reliable connection between them. The specific parts of the adhesive to be applied and the type of adhesive used can be selected and set as needed.

[0049] According to this disclosure, an elevator pulley assembly is also provided, comprising an elevator pulley and a corresponding elevator pulley bushing arranged on the elevator pulley. Because the elevator pulley bushing has significant advantages as described above, such as stable performance, high reliability, ease of manufacturing, convenient assembly and maintenance, and low application cost due to its multiple connection methods, this elevator pulley assembly is very suitable for widespread application in many types of elevator systems. This is of positive significance for ensuring the stable operation of elevator systems and improving system safety performance.

[0050] refer to Figure 5 As shown in the accompanying drawings and as used herein, in various embodiments, the elevator pulley 20 may optionally be configured with two parts: a body 20a and a bracket 20b. The bracket 20b is typically made of a metallic material, for example, the same or different metallic material as the body 20a, such as a metallic material with greater wear resistance than the body 20a. The bracket 20b may be integrally formed and detachably mounted to the body 20a, or it may be configured as needed to have two, three, or more assemblable bracket sections 25, which can be combined onto the body 20a to form the elevator pulley 20. Furthermore, in one or more embodiments, the aforementioned protrusions 24 and grooves 21 may be simultaneously provided on all assemblable bracket sections 25, or selectively provided on only a portion of the assemblable bracket sections 25, to engage with corresponding matching structures on the elevator pulley bushing 10 as required by the specific application.

[0051] Alternatively, as an option, the number of assemblable bracket sections 25 can be exactly the same as the number of combinable sections 18. In this way, each pair of assemblable bracket sections 25 and combinable sections 18 can be independently manufactured into a combinable unit, for example, by assembly or molding. Then, fasteners such as screws or bolts 30 are used, and the combinable unit is fixed to the body 20a by the mounting parts 26 (such as mounting holes) provided on the assemblable bracket section 25 and the mounting parts 27 (such as mounting holes) provided on the body 20a. The entire installation process is very convenient and also facilitates future maintenance and replacement operations.

[0052] The modular support section 25 is less prone to wear than the modular section 18 and can be reused. In practical applications, when one or more modular sections 18 in the elevator pulley bushing 10 are worn out, or even in the extreme case where all modular sections 18 in the entire elevator pulley bushing 10 are worn out, the modular support sections 25 can still bear the traction requirements of the elevator tensioning component 107 without affecting the normal operation of the system. Therefore, as long as a suitable time (such as during the elevator's normal off-peak hours, such as non-working days or nights) is arranged for staff to replace and install new modular sections 18, this greatly helps to reduce system downtime, lower overall service costs, extend the service life of elevator tensioning components and other parts, reduce environmental impact, and promote the improvement of elevator system safety performance and market competitiveness.

[0053] The above examples are merely illustrative of the elevator pulley bushing, elevator pulley assembly, and elevator system according to this disclosure. These examples are for illustrating the principles and implementation methods of this disclosure only, and are not intended to limit the disclosure. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and scope of this disclosure. Therefore, all equivalent technical solutions should fall within the scope of this disclosure and be defined by the claims of this disclosure.

Claims

1. An elevator pulley bushing, characterized in that, The elevator pulley bushing includes two or more combinable sections, which are combined and disposed on the elevator pulley to form an elevator pulley bushing for engagement with an elevator tensioning component. At least one combinable section has a first concave-convex structure disposed laterally at its bottom, which matches a second concave-convex structure disposed laterally on the outer circumferential surface of the elevator pulley to engage accordingly when the at least one combinable section is disposed on the elevator pulley.

2. The elevator pulley bushing according to claim 1, wherein, The combinable section has a first end and a second end that are opposite each other along the circumference of the elevator pulley, the first concave-convex structure is disposed at a position between the first end and the second end, and / or a portion of the first concave-convex structure is disposed on the first end or the second end, and another portion of the first concave-convex structure is disposed on the corresponding end of another combinable section adjacent to the combinable section.

3. The elevator pulley bushing according to claim 1, wherein, The first concave-convex structure includes at least one groove disposed along the axial direction of the elevator pulley, and the second concave-convex structure includes at least one protrusion disposed along the axial direction of the elevator pulley.

4. The elevator pulley bushing according to claim 1, wherein, The combinable segment is configured to have: A first side end and a second side end are opposite each other along the axial direction of the elevator pulley. The first side end is configured to be installed in place after abutting against a first mounting part on the elevator pulley during installation. The second side end is configured to engage with a second mounting part on the elevator pulley during installation. as well as A protrusion is disposed between the first side end and the second side end and configured to be mounted into a circumferentially arranged groove on the elevator pulley.

5. The elevator pulley bushing according to claim 4, wherein, The second assembly is disposed at the outer end of the elevator pulley, and the second side end is configured to extend radially outward along the elevator pulley and extend beyond the groove after installation, so as to disengage the combinable section from the groove by applying a force to the second side end, thereby removing the combinable section from the elevator pulley.

6. The elevator pulley bushing according to claim 1, wherein, The joint between two adjacent combinable sections of the elevator pulley bushing is constructed in a stepped shape, an arc shape, or a diagonal shape, wherein the angle formed between the diagonal line and the longitudinal section of the elevator pulley is less than 90° and not less than 10°.

7. The elevator pulley bushing according to claim 1, wherein, The combinable section is provided with an assembly part for fastening the elevator pulley bushing into place by installing fastening components in the assembly part and providing force along the radial direction of the elevator pulley.

8. An elevator pulley assembly, characterized in that, include: Elevator pulley bushing as described in any one of claims 1-7; as well as An elevator pulley has a second concave-convex structure on its outer circumferential surface. The second concave-convex structure and the first concave-convex structure of the elevator pulley bushing are correspondingly engaged when the elevator pulley bushing is installed on the elevator pulley.

9. The elevator pulley assembly according to claim 8, wherein, The elevator pulley includes a body and a bracket, the bracket being detachably mounted on the body and engaging with the elevator pulley bushing.

10. The elevator pulley assembly according to claim 9, wherein, The bracket has two or more assemblable bracket sections, which are assembled onto the body.

11. The elevator pulley assembly according to claim 10, wherein, Each of the assembled bracket sections has a first portion and a second portion, the first portion having a groove for engaging with a protrusion on the assembled section, and the second portion being connected to the first portion and extending radially toward the center of the elevator pulley.

12. The elevator pulley assembly according to claim 11, wherein, The number of the assembleable bracket sections is the same as the number of the combinable sections. Each pair of assembleable bracket sections and combinable sections is individually assembled and then fixed to the main body by mounting components.

13. The elevator pulley assembly according to claim 8, wherein, The elevator pulley bushing is also connected to the elevator pulley by adhesive.

14. An elevator system, characterized in that, include: A power unit, configured to provide power; An elevator car that can move between elevator floors under the action of the aforementioned power; as well as An elevator tensioning component and an elevator pulley assembly as described in any one of claims 8-13, wherein the elevator pulley is connected to the power output end of the power unit, and the elevator tensioning component engages with the elevator pulley bushing and is connected to the elevator car to transmit the power to the elevator car.

15. The elevator system according to claim 14, wherein, The power unit includes a traction machine and a winch, and / or the elevator tensioning component includes a steel belt and a rope.

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