Elevator drive module and elevator

Abstract

The elevator drive module and the elevator of the present application, the elevator drive module comprises a hoisting machine, a transmission unit, a traction sheave and a control unit, the transmission unit comprises a driving wheel assembly, a driven wheel assembly and a conveyor belt arranged around the driving wheel assembly and the driven wheel assembly, the driving wheel assembly is drivingly connected to the hoisting machine; wherein the driving wheel assembly is configured to change a first radius of rotation of the conveyor belt thereon, the driven wheel assembly is configured to change a second radius of rotation of the conveyor belt thereon; the traction sheave is drivingly connected to the driven wheel assembly; the control unit is drivingly connected to the driving wheel assembly and the driven wheel assembly respectively, for synchronously adjusting the first radius of rotation and the second radius of rotation; wherein the control unit comprises a first working mode and a second working mode, in the first working mode, the control unit controls the first radius of rotation to increase and the second radius of rotation to decrease; in the second working mode, the control unit controls the first radius of rotation to decrease and the second radius of rotation to increase.

Description

Technical Field

[0001] This utility model belongs to the field of elevator drive technology, and in particular relates to an elevator drive module and an elevator. Background Technology

[0002] In elevator drive systems, the electric drive system is the core power source, typically employing a traction machine based on Variable Voltage Variable Frequency (VVVF) speed control technology. Specifically, by adjusting the voltage and frequency of the motor in the traction machine, the speed is controlled, achieving smooth speed regulation and effective control of elevator operation.

[0003] Currently, existing elevator drive systems, such as the "energy recovery structure for a direct-descent elevator" proposed in patent publication CN219322131U, typically generate electricity through a CVT gearbox connected in series with a DC generator and store the electrical energy in a battery. The elevator main shaft rotates at a constant speed to provide torque for energy recovery, and this energy recovery structure simultaneously provides power to the elevator. However, this approach has significant drawbacks: First, it heavily relies on complex power electronic inverter circuits, increasing both the cost and potential for failure of the elevator drive system; second, the energy requires multiple conversions between mechanical energy and electrical energy and back to mechanical energy, with inherent losses in the intermediate stages, resulting in limited recovery efficiency; finally, the entire elevator drive system structure is more complex, reducing reliability, and its energy-saving benefits are often offset by increased purchase and maintenance costs. Utility Model Content

[0004] In view of this, it is necessary to provide an elevator drive module and an elevator that can improve ride comfort, reduce energy consumption, enhance system reliability, and improve speed regulation response through stepless speed adjustment.

[0005] An elevator drive module, the elevator drive module comprising: Traction machine; The transmission unit includes a drive wheel assembly, a driven wheel assembly, and a conveyor belt surrounding the drive wheel assembly and the driven wheel assembly, wherein the drive wheel assembly is drively connected to the traction machine; wherein the drive wheel assembly is configured to change a first radius of rotation of the conveyor belt thereon, and the driven wheel assembly is configured to change a second radius of rotation of the conveyor belt thereon. The traction sheave is connected to the driven sheave assembly in a driving transmission manner; The control unit is connected to the driving wheel assembly and the driven wheel assembly respectively, and is used to synchronously adjust the first rotation radius and the second rotation radius to change the transmission ratio between the driving wheel assembly and the driven wheel assembly; The control unit includes a first operating mode and a second operating mode. In the first operating mode, the control unit controls the first rotation radius to increase and the second rotation radius to decrease. In the second operating mode, the control unit controls the first rotation radius to decrease and the second rotation radius to increase.

[0006] Understandably, by employing a control unit to synchronously control the first rotation radius of the conveyor belt at the drive wheel assembly and the second rotation radius at the driven wheel assembly, continuous and precise speed adjustment of the elevator is achieved based on the principle of stepless speed change. This allows the elevator drive module to not only dynamically adjust the speed according to the elevator's real-time load and operating requirements, thus eliminating the jerking sensation of traditional stepped speed regulation and improving ride comfort, but also, by optimizing the transmission ratio between the drive wheel assembly and the drive wheel assembly, to ensure the traction machine continuously maintains a high-efficiency operating range, thereby achieving energy saving and consumption reduction. Simultaneously, it simplifies the mechanical and electrical structure of the elevator drive module, thereby reducing failure points, lowering manufacturing and maintenance costs, and providing rapid response capabilities. In emergency situations, it effectively ensures stable operation and comprehensively improves the elevator's safety performance.

[0007] In one embodiment, the drive wheel assembly includes a first conical wheel, a second conical wheel, and a first drive shaft. The first drive shaft is drively connected to the first conical wheel. The second conical wheel is slidably mounted on the first drive shaft and is disposed opposite to the first conical wheel, such that the distance between the first and second conical wheels is adjustable. The first and second conical wheels form a first V-groove for accommodating a portion of the conveyor belt. The second conical wheel can adjust its distance from the first conical wheel under the control unit's direction to change the first V-groove, thereby adjusting the first radius of rotation of the conveyor belt on the first drive shaft. And / or, the driven wheel assembly includes a third conical wheel, a fourth conical wheel, and a second drive shaft. The second drive shaft is drively connected to the third conical wheel. The fourth conical wheel is slidably mounted on the second drive shaft and is disposed opposite to the third conical wheel, such that the distance between the third and fourth conical wheels is adjustable. The third and fourth conical wheels form a second V-groove for accommodating a portion of the conveyor belt. The fourth conical wheel can adjust its distance from the third conical wheel under the control of the control unit to change the second V-groove, thereby adjusting the second rotation radius of the conveyor belt on the second drive shaft.

[0008] In one embodiment, the cross-section of the conveyor belt is trapezoidal, and the width of its cross-section gradually increases along the radial direction of the conveyor belt; A portion of the conveyor belt is disposed within the first V-groove and is connected to the first drive shaft; and another portion of the conveyor belt is disposed within the second V-groove and is connected to the second drive shaft.

[0009] It is understandable that by setting the trapezoidal cross-section of the conveyor belt, the conveyor belt can form a wedge-shaped fit with the first V-groove and / or the second V-groove. This can increase the friction force on the conveyor belt during transmission, prevent slippage, and thus ensure reliable power transmission between the drive wheel assembly and the driven wheel assembly.

[0010] In one embodiment, the control unit includes a first hydraulic cylinder and a second hydraulic cylinder, which are connected by a circulation pipeline, and a metering pump is provided on the circulation pipeline. The first piston rod of the first hydraulic cylinder is drivenly connected to the driving wheel assembly, and is used to drive the second conical wheel to move closer to or away from the first conical wheel; the second piston rod of the second hydraulic cylinder is drivenly connected to the driven wheel assembly, and is used to drive the fourth conical wheel to move closer to or away from the third conical wheel.

[0011] Understandably, by using a fixed-displacement pump to drive the oil in the circulation pipeline, the first and second hydraulic cylinders can achieve precise, equal, and opposite synchronous movements. This allows for the synchronous and continuous adjustment of the transmission ratio between the drive wheel assembly and the driven wheel assembly, thus meeting the requirements of stepless speed regulation in elevators. Furthermore, it eliminates the need for complex mechanical connection components, simplifying the overall structure of the control unit and reducing potential failure points. This not only improves the reliability and service life of the elevator drive module but also achieves more efficient and energy-saving operation.

[0012] In one embodiment, a first reversing solenoid valve is provided on the circulation pipeline, and the first reversing solenoid valve is connected to the first rod chamber and the first rodless chamber of the first hydraulic cylinder respectively. And / or, a second reversing solenoid valve is provided on the circulation pipeline, the second reversing solenoid valve being connected to the second rod chamber and the second rodless chamber of the second hydraulic cylinder respectively.

[0013] In one embodiment, the control unit further includes a connecting assembly comprising a sleeve and a rotating rod, the rotating rod extending into the sleeve and rotatably connected to the sleeve. In one configuration, the sleeve is fitted onto the first piston rod and connected to it via a pin passing through the sleeve and the first piston rod. The rotating rod located outside the sleeve is connected to the second conical disc of the driving wheel assembly. Alternatively, the sleeve is fitted onto the second piston rod and connected to it via a pin passing through the sleeve and the second piston rod. The rotating rod located outside the sleeve is connected to the fourth conical disc of the driven wheel assembly.

[0014] In one embodiment, the inner wall of the sleeve is provided with a plurality of balls spaced apart along its circumferential direction, and the plurality of balls respectively make rolling contact with the portion of the rotating rod located inside the sleeve.

[0015] It is understandable that by using ball bearings to achieve the rotational connection between the rotating rod and the sleeve, the frictional resistance experienced by the rotating rod when it rotates relative to the sleeve can be reduced.

[0016] In one embodiment, the elevator drive module further includes a transmission connecting shaft and a transmission bearing, wherein the transmission connecting shaft passes through the transmission bearing and is supported by the transmission bearing; Wherein, one end of the transmission connecting shaft extending from the transmission bearing is connected to the driven wheel assembly, and the traction wheel is connected to the other end of the transmission connecting shaft extending from the transmission bearing.

[0017] In one embodiment, the elevator drive module further includes a fixed base, on which the transmission bearing is mounted; The fixed base is adjustable relative to the traction machine to adjust the tension of the conveyor belt.

[0018] Understandably, by adopting a fixed seat design with an adjustable position relative to the traction machine, the tension of the conveyor belt on the drive pulley assembly and the driven pulley assembly can be adjusted. This ensures that the conveyor belt is always wrapped around the drive pulley assembly and the driven pulley assembly with optimal tension, thereby ensuring effective meshing of the transmission and stable operation.

[0019] This application also provides an elevator, including the elevator drive module described above.

[0020] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: The elevator drive module and elevator claimed in this application achieve continuous and precise speed adjustment of the elevator by employing a control unit to synchronously control the first rotation radius of the conveyor belt at the drive wheel assembly and the second rotation radius at the driven wheel assembly. Based on the principle of stepless speed regulation, this elevator drive module can not only dynamically adjust the speed according to the elevator's real-time load and operating requirements, thus eliminating the jerking sensation of traditional stepped speed regulation and improving ride comfort, but also optimize the transmission ratio between the drive wheel assembly and the drive wheel assembly, enabling the traction machine to continuously maintain a high-efficiency operating range, thereby achieving energy saving and consumption reduction. Simultaneously, it simplifies the mechanical and electrical structure of the elevator drive module, thereby reducing failure points, lowering manufacturing and maintenance costs, and providing rapid response capabilities. In emergency situations, it can effectively ensure stable operation and comprehensively improve the elevator's safety performance. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a structural schematic diagram of the elevator drive module provided in this application.

[0023] Figure 2 This is a schematic diagram of the drive system provided in this application.

[0024] Figure 3 A schematic diagram of the structure when the drive system provided in this application is dynamically adjusted.

[0025] Figure 4 A schematic diagram of the structure when another dynamic adjustment is made to the drive system provided in this application.

[0026] Figure 5 This is a cross-sectional view of the conveyor belt in this application.

[0027] Figure 6 This is a cross-sectional view of the first piston rod / second piston rod of this application when they are connected to the driving wheel assembly / driven wheel assembly via a connecting assembly.

[0028] Reference numerals: 100, Elevator drive module; 110, Base plate; 111, Mounting slot; 112, Lead screw; 113, Anti-loosening nut; 10, Traction machine; 20, Transmission unit; 21, Drive wheel assembly; 210, First V-groove; 211, First conical wheel; 212, Second conical wheel; 213, First drive shaft; 22, Driven wheel assembly; 220, Second V-groove; 221, Third conical wheel; 222, Fourth conical wheel; 223, Second drive shaft; 23, Conveyor belt 30. Traction sheave; 31. Transmission connecting shaft; 32. Transmission bearing; 33. Fixed seat; 40. Control unit; 41. First hydraulic cylinder; 411. First piston rod; 42. Second hydraulic cylinder; 421. Second piston rod; 43. Circulation pipeline; 431. First reversing solenoid valve; 432. Second reversing solenoid valve; 44. Metering pump; 45. Connecting assembly; 451. Sleeve; 4511. Inner wall; 4512. Annular groove; 452. Rotating rod; 453. Pin; 454. Ball bearing. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that when a component is said to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or may have an intervening component.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] like Figures 1 to 6As shown, the elevator drive module 100 provided in this application includes a traction machine 10, a transmission unit 20, a traction sheave 30, and a control unit 40. The transmission unit 20 includes a drive sheave assembly 21, a driven sheave assembly 22, and a conveyor belt 23 surrounding the drive sheave assembly 21 and the driven sheave assembly 22. The drive sheave assembly 21 is drively connected to the traction machine 10. The drive sheave assembly 21 is configured to change a first rotation radius R1 of the conveyor belt 23 on it, and the driven sheave assembly 22 is configured to change a second rotation radius R2 of the conveyor belt 23 on it. The traction sheave 30 and the driven sheave assembly 40... The driving wheel assembly 22 is connected to the drive wheel assembly 21 and the driven wheel assembly 22 respectively, and is used to synchronously adjust the first rotation radius R1 and the second rotation radius R2 to change the transmission ratio between the drive wheel assembly 21 and the driven wheel assembly 22; wherein, the control unit 40 includes a first working mode and a second working mode. In the first working mode, the control unit 40 controls the first rotation radius R1 to increase and the second rotation radius R2 to decrease; in the second working mode, the control unit 40 controls the first rotation radius R1 to decrease and the second rotation radius R2 to increase. Here, the traction machine 10, the transmission unit 20 and the traction sheave 30 together constitute the drive system of the elevator drive module 100.

[0033] As can be seen from the above, the elevator drive module 100 of this application achieves continuous and precise adjustment of elevator speed by using the control unit 40 to synchronously control the first rotation radius R1 of the conveyor belt 23 at the drive wheel assembly 21 and the second rotation radius R2 at the driven wheel assembly 22. Based on the stepless speed change principle, this elevator drive module 100 can not only dynamically adjust the speed according to the real-time load and operating requirements of the elevator, thereby eliminating the jerking sensation of traditional stepped speed regulation and improving ride comfort, but also optimize the transmission ratio between the drive wheel assembly 21 and the driven wheel assembly 22, enabling the traction machine 10 to continuously maintain a high-efficiency operating range, thereby achieving the purpose of energy saving and consumption reduction. At the same time, it can also simplify the mechanical and electrical structure of the elevator drive module 100, thereby reducing failure points, lowering manufacturing and maintenance costs, and providing rapid response capabilities. In emergency situations, it can effectively ensure stable operation and comprehensively improve the safety performance of the elevator.

[0034] Here, the first rotation radius R1 mentioned above is specifically the effective working radius of the part of the conveyor belt 23 located on the drive wheel assembly 21 when the drive wheel assembly 21 drives the conveyor belt 23 to move; similarly, the second rotation radius R2 mentioned above is specifically the effective working radius of the part of the conveyor belt 23 located on the driven wheel assembly 22 when the conveyor belt 23 drives the driven wheel assembly 22 to rotate.

[0035] It should be noted that the control unit 40 is connected to the drive wheel assembly 21 and the driven wheel assembly 22 respectively, driving the change of the wheel flange spacing in the drive wheel assembly 21 and the wheel flange spacing in the driven wheel assembly 22, so as to synchronously adjust the first rotation radius R1 and the second rotation radius R2; wherein the wheel flange spacing is the distance between the left and right wheel flanges of the drive wheel assembly 21 or the distance between the left and right wheel flanges of the driven wheel assembly 22, and the space between the left and right wheel flanges is used to accommodate the conveyor belt.

[0036] like Figure 1 , Figure 2 As shown, in one embodiment, the drive wheel assembly 21 includes a first conical wheel 211, a second conical wheel 212, and a first drive shaft 213. The first drive shaft 213 is drively connected to the first conical wheel 211. The second conical wheel 212 is slidably mounted on the first drive shaft 213 and is disposed opposite to the first conical wheel 211, such that the distance between the first conical wheel 211 and the second conical wheel 212 is adjustable. A first V-groove 210 for accommodating a portion of the conveyor belt 23 is formed between the first conical wheel 211 and the second conical wheel 212. The second conical wheel 212 can adjust its distance from the first conical wheel 211 under the drive of the control unit 40 to change the first V-groove 210, thereby adjusting the first rotation radius R1 of the conveyor belt 23 on the first drive shaft 213. In other words, this embodiment can achieve the adjustment of the first rotation radius R1 of the conveyor belt 23 on the drive wheel assembly 21 by controlling the second conical wheel 212 to slide on the first drive shaft 213.

[0037] Here, the first conical wheel 211 is fixedly mounted on the first drive shaft 213, and the second conical wheel 212 is keyed to the first drive shaft 213. The first drive shaft 213 is connected to the traction machine 10 for transmission, so that when the elevator drive module 100 is working, the traction machine 10 can input power to the conveyor belt 23 through the first drive shaft 213 or through the first conical wheel 211 and the second conical wheel 212 used to clamp the conveyor belt 23.

[0038] Similarly, such as Figure 1 , Figure 2As shown, the driven wheel assembly 22 includes a third conical wheel 221, a fourth conical wheel 222, and a second drive shaft 223. The second drive shaft 223 is drively connected to the third conical wheel 221. The fourth conical wheel 222 is slidably mounted on the second drive shaft 223 and is arranged opposite to the third conical wheel 221, so that the distance between the third conical wheel 221 and the fourth conical wheel 222 is adjustable, and a second V-groove 220 for accommodating part of the conveyor belt is formed between the third conical wheel 221 and the fourth conical wheel 222. The fourth conical wheel 222 can adjust its distance from the third conical wheel 221 under the drive of the control unit 40 to change the second V-groove 220, thereby adjusting the second rotation radius R2 of the conveyor belt 23 on the second drive shaft 223.

[0039] Here, the third conical wheel 221 is fixedly mounted on the second drive shaft 223, and the fourth conical wheel 222 is keyed to the second drive shaft 223. The second drive shaft 223 is connected to the traction sheave 30 for transmission, so that when the elevator drive module 100 is working, the conveyor belt 23 can output power to the traction sheave 30 through the second drive shaft 223 or through the third conical wheel 221 and the fourth conical wheel 222 used to clamp the conveyor belt 23.

[0040] Furthermore, such as Figure 5 As shown, the cross-section of the conveyor belt 23 is trapezoidal, and its width D gradually increases along the radial direction r of the conveyor belt 23. A portion of the conveyor belt 23 is disposed within the first V-groove 210 and is connected to the first drive shaft 213; another portion of the conveyor belt 23 is disposed within the second V-groove 220 and is connected to the second drive shaft 223. This allows the conveyor belt 23 to form a wedge-shaped fit with the first V-groove 210 and / or the second V-groove 220, increasing the friction experienced by the conveyor belt 23 during transport, preventing slippage, and thus ensuring reliable power transmission between the drive wheel assembly 21 and the driven wheel assembly 22.

[0041] like Figure 1 As shown, in one embodiment, the elevator drive module 100 further includes a transmission connecting shaft 31 and a transmission bearing 32. The transmission connecting shaft 31 passes through and is supported by the transmission bearing 32. One end of the transmission connecting shaft 31 extending out of the transmission bearing 32 is connected to the driven wheel assembly 22, and the traction sheave 30 is connected to the other end of the transmission connecting shaft 31 extending out of the transmission bearing 32. In other words, the rotational power of the driven wheel assembly 22 in this embodiment can be transmitted to the traction sheave 30 through the transmission connecting shaft 31, driving it to rotate synchronously.

[0042] Here, the elevator drive module 100 also includes a fixed base 33, on which the transmission bearing 32 is mounted; and the fixed base 33 is adjustable relative to the traction machine 10 to adjust the tension of the conveyor belt 23. This allows the conveyor belt 23 to be initially fitted onto the drive pulley assembly 21 and the driven pulley assembly 22 in a relaxed state, and then the conveyor belt 23 can be easily tensioned by adjusting the position of the fixed base 33. This facilitates the installation of the conveyor belt 23 on the drive pulley assembly 21 and the driven pulley assembly 22; at the same time, it ensures that the conveyor belt 23 can always wrap around the drive pulley assembly 21 and the driven pulley assembly 22 with optimal tension, thereby ensuring effective engagement and operational stability of the conveyor belt 23.

[0043] Specifically, such as Figure 1 As shown, in this elevator drive module 100, a mounting groove 111 is provided on the base plate 110 that supports the traction machine 10. A lead screw 112 is installed in the mounting groove 111. A fixed seat 33 is at least partially disposed in the mounting groove 111 and movably sleeved on the lead screw 112, and is axially limited by a lock nut 113 screwed onto the lead screw 112. When it is necessary to adjust the position of the fixed seat 33 on the lead screw 112, the lock nut 113 can be loosened to release the limitation on the fixed seat 33. Then, the fixed seat 33 is moved along the lead screw 112 to the desired position, and finally the lock nut 113 is tightened again to fix the fixed seat 33. Here, there are two lead screws 112. Of course, in other embodiments, the number of lead screws 112 may be three, four, or even more; or, the fixing seat 33 may be screwed onto the lead screw 112, and the position of the fixing seat 33 along its axial direction may be adjusted by turning the lead screw 112.

[0044] like Figure 1As shown, in one embodiment, the control unit 40 includes a first hydraulic cylinder 41 and a second hydraulic cylinder 42. The first piston rod 411 of the first hydraulic cylinder 41 is drivenly connected to the driving wheel assembly 21 to drive the second conical wheel 212 to approach or move away from the first conical wheel 211. The second piston rod 421 of the second hydraulic cylinder 42 is drivenly connected to the driven wheel assembly 22 to drive the fourth conical wheel 222 to approach or move away from the third conical wheel 221. The first hydraulic cylinder 41 and the second hydraulic cylinder 42 are connected through a circulation pipeline 43, and a metering pump 44 is provided on the circulation pipeline 43. In other words, the control unit 40 of this embodiment, by using a metering pump 44 to drive the oil in the circulation pipeline 43, can achieve precise, equal, and opposite synchronous action of the first hydraulic cylinder 41 and the second hydraulic cylinder 42. This allows for synchronous and continuous adjustment of the transmission ratio between the drive wheel assembly 21 and the driven wheel assembly 22, thus meeting the requirements of stepless speed regulation of the elevator. Furthermore, it eliminates the need for complex mechanical connection components, simplifying the overall structure of the control unit 40 and reducing potential failure points. This improves the reliability and service life of the elevator drive module 100 while also achieving more efficient and energy-saving operation. Of course, for those skilled in the art, the methods for achieving synchronous action of the drive wheel assembly 21 and the driven wheel assembly 22 are not limited to the above-described embodiments. Specifically, the control unit 40 can use two independently configured telescopic drive components to control the drive wheel assembly 21 and the driven wheel assembly 22 respectively, or achieve synchronous adjustment of the two through a mechanical linkage mechanism driven by the same power source. The specific method can be flexibly selected according to actual structural requirements, and will not be elaborated upon here.

[0045] like Figure 1 As shown, in this embodiment, a first reversing solenoid valve 431 is provided on the circulation pipeline 43, and the first reversing solenoid valve 431 is connected to the first rod chamber (not shown) and the first rodless chamber (not shown) of the first hydraulic cylinder 41 respectively; and / or, a second reversing solenoid valve 432 is provided on the circulation pipeline 43, and the second reversing solenoid valve 432 is connected to the second rod chamber (not shown) and the second rodless chamber (not shown) of the second hydraulic cylinder 42 respectively. Preferably, circulation solenoid valves can be used to realize the conduction between the circulation pipeline 43 and the first hydraulic cylinder 41 and the second hydraulic cylinder 42, so that the metering pump 44 can control the extension and retraction of the first piston rod 411 on the first hydraulic cylinder 41 and the second piston rod 421 on the second hydraulic cylinder 42 by pumping and discharging oil in the circulation pipeline 43. Here, the metering pump 44 can specifically be a bidirectional metering pump.

[0046] It should be noted that the first hydraulic cylinder 41 and the second hydraulic cylinder 42 mentioned above are actuators that convert hydraulic energy into linear mechanical motion. They have the same structure and working principle. The first hydraulic cylinder 41 will be described in detail below as an example. The core structure of the first hydraulic cylinder 41 includes a cylinder barrel, a piston, and a piston rod connected to the piston and extending out of the cylinder barrel at one end. The piston divides the internal space of the cylinder barrel into two closed chambers. The side connected to the piston rod is called the first rod chamber mentioned above. The other side of the piston is called the first rodless chamber. When the first hydraulic cylinder 41 is working, when the hydraulic oil in the circulation pipeline 43 is driven by the metering pump 44 and flows into the first rodless chamber through the first reversing solenoid valve 431, the oil pressure of the incoming hydraulic oil will act on the entire piston end face, pushing the piston and piston rod outward, and realizing that the first hydraulic cylinder 41 drives the second conical wheel 212 to approach the first conical wheel 211. At this time, the hydraulic oil in the first rod chamber is discharged and flows into the circulation pipeline 43 through the first reversing solenoid valve 431. Conversely, when the circulation pipeline 43 supplies oil to the first rod chamber through the first reversing solenoid valve 431, the piston rod retracts, causing the first hydraulic cylinder 41 to drive the second conical wheel 212 away from the first conical wheel 211.

[0047] like Figure 6 As shown, in one embodiment, the control unit 40 further includes a connecting assembly 45, which includes a sleeve 451 and a rotating rod 452. The rotating rod 452 extends into the sleeve 451 and is rotatably connected to the sleeve 451. The sleeve 451 is sleeved on the first piston rod 411 / second piston rod 421 and is connected to the first piston rod 411 / second piston rod 421 by a pin 453 passing through the sleeve 451. The part of the rotating rod 452 located outside the sleeve 451 is connected to the second conical wheel 212 of the driving wheel assembly 21 / the fourth conical wheel 222 of the driven wheel assembly 22.

[0048] Here, the end of the rotating rod 452 that extends out of the sleeve 451 can be connected to the corresponding second conical wheel 212 / fourth conical wheel 222 by welding.

[0049] like Figure 6 As shown, in one embodiment, the inner wall 4511 of the sleeve 451 is provided with a plurality of balls 454 spaced apart along its circumferential direction. The plurality of balls 454 respectively make rolling contact with the portion of the rotating rod 452 located inside the sleeve 451. This makes the friction between the rotating rod 452 and the sleeve 451 rolling friction when the rotating rod 452 rotates inside the sleeve 451, thereby reducing the frictional resistance experienced by the rotating rod 452 when it rotates relative to the sleeve 451.

[0050] Specifically, such as Figure 6As shown, an annular groove 4512 is provided on the inner wall 4511 of the sleeve 451. The part of the rotating rod 452 that extends into the sleeve 451 is engaged in the annular groove 4512 to achieve the abutment and limiting of the sleeve 451 and the rotating rod 452 in the axial direction. Among them, the ball bearings 454 are provided at both ends of the annular groove 4512 along the axial direction of the sleeve 451.

[0051] In addition, this application also provides an elevator, including the elevator drive module 100 described above.

[0052] like Figure 1 , Figure 2 and Figure 4 As shown, when the elevator starts, the control unit 40 first operates: the metering pump 44 supplies oil to the second rodless chamber of the second hydraulic cylinder 42 through the circulation pipe 43, driving the second piston rod 421 to push out, causing the fourth conical wheel 222 to move toward the third conical wheel 221, reducing the distance between the fourth conical wheel 222 and the third conical wheel 221, thereby reducing the second rotation radius R2; at the same time, the metering pump 44 supplies oil to the first rod chamber of the first hydraulic cylinder 41 through the circulation pipe 43, driving the first piston rod 411 to retract, causing the second conical wheel 212 to move away from the first conical wheel 211, increasing the distance between the second conical wheel 212 and the first conical wheel 211, thereby increasing the first rotation radius R1, so that the first rotation radius R1 of the conveyor belt 23 on the driving wheel assembly 21 reaches its maximum and the second rotation radius R2 on the driven wheel assembly 22 reaches its minimum. At this time, the transmission ratio between the driving wheel assembly 21 and the driven wheel assembly 22 is at its maximum and the output torque is at its highest. Subsequently, the traction machine 10 starts and drives the drive wheel assembly 21 to rotate, which in turn drives the driven wheel assembly 22 and the traction sheave 30 to rotate via the conveyor belt 23, thereby achieving a smooth start-up of the elevator with low energy consumption under a large transmission ratio.

[0053] like Figures 1 to 3As shown, during elevator operation, the elevator drive module 100 first adjusts the speed of the drive wheel assembly 21 to the optimal state, then controls the electromagnetic reversing valve to reverse, causing the fixed displacement pump 44 to supply oil to the second rod chamber of the second hydraulic cylinder 42 on the driven wheel assembly 22 side, driving the second piston rod 421 to retract; simultaneously, the fixed displacement pump 44 supplies oil to the first rodless chamber of the first hydraulic cylinder 41 on the drive wheel assembly 21 side, driving the first piston rod 411 to extend; at this time, the first conical wheel 211 and the second conical wheel 212 in the drive wheel assembly 21... The distance between the three conical discs 221 and 222 in the driven wheel assembly 22 gradually decreases, while the distance between the third conical disc 221 and 222 in the driven wheel assembly 22 gradually increases to accelerate the elevator. When the elevator needs to decelerate, the elevator drive module 100 controls the electromagnetic reversing valve to reverse, controlling the distance between the three conical discs 221 and 222 in the driven wheel assembly 22 to increase and the distance between the three conical discs 221 and 222 in the driven wheel assembly 22 to decrease, and simultaneously reducing the speed of the drive wheel assembly 21 until the elevator stops.

[0054] like Figures 2 to 4 As shown, during elevator operation, the elevator drive module 100 first adjusts the speed of the drive wheel assembly 21 to the high-efficiency range, and then controls the electromagnetic reversing valve on the circulation pipeline 43 to reverse: the fixed displacement pump 44 supplies oil to the second rod chamber of the second hydraulic cylinder 42 corresponding to the driven wheel assembly 22, driving the second piston rod 421 to retract; at the same time, it supplies oil to the first rodless chamber of the first hydraulic cylinder 41 corresponding to the drive wheel assembly 21, driving the first piston rod 411 to push out. At this time, the distance between the first conical wheel 211 and the second conical wheel 212 in the drive wheel assembly 21 gradually decreases, and the distance between the third conical wheel 221 and the fourth conical wheel 222 in the driven wheel assembly 22 gradually increases, thereby continuously changing the transmission ratio and achieving smooth acceleration of the elevator. When the elevator needs to decelerate, the electromagnetic reversing valve is controlled to reverse again, causing the distance between the two conical wheels in the driven wheel assembly 22 to decrease and the distance between the two conical wheels in the drive wheel assembly 21 to increase, and simultaneously reducing the speed of the drive wheel assembly 21 until the elevator stops.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.

Claims

1. An elevator drive module, characterized in that, The elevator drive module (100) includes: Traction machine (10); The transmission unit (20) includes a drive wheel assembly (21), a driven wheel assembly (22), and a conveyor belt (23) surrounding the drive wheel assembly (21) and the driven wheel assembly (22). The drive wheel assembly (21) is drive-connected to the traction machine (10). The drive wheel assembly (21) is configured to change a first radius of rotation of the conveyor belt (23) thereon, and the driven wheel assembly (22) is configured to change a second radius of rotation of the conveyor belt (23) thereon. The traction sheave (30) is connected to the driven wheel assembly (22) in a transmission manner; The control unit (40) is connected to the driving wheel assembly (21) and the driven wheel assembly (22) respectively, and is used to synchronously adjust the first rotation radius and the second rotation radius to change the transmission ratio between the driving wheel assembly (21) and the driven wheel assembly (22); The control unit (40) includes a first working mode and a second working mode. In the first working mode, the control unit (40) controls the first rotation radius to increase and the second rotation radius to decrease. In the second working mode, the control unit (40) controls the first rotation radius to decrease and the second rotation radius to increase.

2. The elevator drive module according to claim 1, characterized in that, The drive wheel assembly (21) includes a first conical wheel (211), a second conical wheel (212), and a first drive shaft (213). The first drive shaft (213) is connected to the first conical wheel (211). The second conical wheel (212) is slidably mounted on the first drive shaft (213) and is arranged opposite to the first conical wheel (211), such that the distance between the first conical wheel (211) and the second conical wheel (212) is adjustable. A first V-groove (210) for accommodating a portion of the conveyor belt (23) is formed between the first conical wheel (211) and the second conical wheel (212). The second conical wheel (212) can adjust its distance from the first conical wheel (211) under the drive of the control unit (40) to change the first V-groove (210) to adjust the first rotation radius of the conveyor belt (23) on the first drive shaft (213). And / or, the driven wheel assembly (22) includes a third conical wheel (221), a fourth conical wheel (222), and a second drive shaft (223). The second drive shaft (223) is drively connected to the third conical wheel (221). The fourth conical wheel (222) is slidably mounted on the second drive shaft (223) and is disposed opposite to the third conical wheel (221), such that the third conical wheel (221) and the fourth conical wheel (222) are... The spacing between the three conical discs (221) and the four conical discs (222) forms a second V-groove (220) for accommodating a portion of the conveyor belt (23); and the fourth conical disc (222) can adjust its spacing with the third conical disc (221) under the control unit (40) to change the second V-groove (220) to adjust the second rotation radius of the conveyor belt (23) on the second drive shaft (223).

3. The elevator drive module according to claim 2, characterized in that, The cross-section of the conveyor belt (23) is trapezoidal, and the width of its cross-section gradually increases along the radial direction of the conveyor belt (23). A portion of the conveyor belt (23) is disposed within the first V-groove (210) and is connected to the first drive shaft (213) via transmission; and another portion of the conveyor belt (23) is disposed within the second V-groove (220) and is connected to the second drive shaft (223) via transmission.

4. The elevator drive module according to claim 2, characterized in that, The control unit (40) includes a first hydraulic cylinder (41) and a second hydraulic cylinder (42), the first hydraulic cylinder (41) and the second hydraulic cylinder (42) are connected through a circulation pipeline (43), and a metering pump (44) is provided on the circulation pipeline (43). The first piston rod (411) of the first hydraulic cylinder (41) is connected to the driving wheel assembly (21) for driving the second conical wheel (212) to approach or move away from the first conical wheel (211); the second piston rod (421) of the second hydraulic cylinder (42) is connected to the driven wheel assembly (22) for driving the fourth conical wheel (222) to approach or move away from the third conical wheel (221).

5. The elevator drive module according to claim 4, characterized in that, The circulation pipeline (43) is provided with a first reversing solenoid valve, which is connected to the first rod chamber and the first rodless chamber of the first hydraulic cylinder (41) respectively. And / or, a second reversing solenoid valve is provided on the circulation pipeline (43), and the second reversing solenoid valve is connected to the second rod chamber and the second rodless chamber of the second hydraulic cylinder (42) respectively.

6. The elevator drive module according to claim 4, characterized in that, The control unit (40) further includes a connecting assembly (45), which includes a sleeve (451) and a rotating rod (452), wherein the rotating rod (452) extends into the sleeve (451) and is rotatably connected to the sleeve (451); In one configuration, the sleeve (451) is fitted onto the first piston rod (411) and connected to it via a pin (453) passing through the sleeve (451) and the first piston rod (411). The rotating rod (452) located outside the sleeve (451) is connected to the second conical disc (212) of the drive wheel assembly (21). Alternatively, the sleeve (451) is fitted onto the second piston rod (421) and connected to it via a pin (453) passing through the sleeve (451) and the second piston rod (421). The rotating rod (452) located outside the sleeve (451) is connected to the fourth conical disc (222) of the driven wheel assembly (22).

7. The elevator drive module according to claim 6, characterized in that, The inner wall (4511) of the sleeve (451) is provided with a plurality of balls (454) spaced apart along its circumferential direction, and the plurality of balls (454) respectively roll in contact with the portion of the rotating rod (452) located inside the sleeve (451).

8. The elevator drive module according to claim 1, characterized in that, The elevator drive module (100) also includes a transmission connecting shaft (31) and a transmission bearing (32), wherein the transmission connecting shaft (31) passes through the transmission bearing (32) and is supported by the transmission bearing (32); One end of the transmission connecting shaft (31) extending out of the transmission bearing (32) is connected to the driven wheel assembly (22), and the traction wheel (30) is connected to the other end of the transmission connecting shaft (31) extending out of the transmission bearing (32).

9. The elevator drive module according to claim 8, characterized in that, The elevator drive module (100) also includes a fixed base (33), and the transmission bearing (32) is mounted on the fixed base (33); The fixed seat (33) is adjustable relative to the traction machine (10) to adjust the tension of the conveyor belt (23).

10. An elevator, characterized in that, Includes the elevator drive module (100) as described in any one of claims 1 to 9.

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