Elevator driven by a motor drive unit

Abstract

An elevator towed by a motor drive is disclosed, and a miniaturized motor drive is used to output large torque. A large diameter traction sheave and a large diameter traction rope are used to improve the traction force of the traction rope, so as to meet the needs of the application scenario of lifting a large load and running at high speed. The use of a miniaturized motor drive not only reduces the occupied space and facilitates transportation, installation, arrangement and maintenance, but also brings great convenience to the manufacturing of components, saves raw materials, reduces the processing and assembly time, and reduces the manufacturing cost of components.

Description

[Technical field]

[0001] The present invention relates to elevators, and more particularly to elevators traction by motor drives. [Background technology]

[0002] In order to meet the traction force needs in the application scenario of lifting a large load and running at high speed, and to ensure that the traction rope has a sufficient service life, elevators generally use a traction rope with a large diameter. According to the requirement of 5.5.2 in the Chinese elevator standard GB / T 7588.1-2020, the ratio (D / d) between the pitch circle diameter D of the traction sheave of the hoisting wheel, pulley, reel, etc. and the diameter d of the traction rope (suspension wire rope) must be 40 or more. Therefore, after using a traction rope with a large diameter, it is necessary to use a traction sheave with a large pitch circle diameter correspondingly, so that the motor drive device must output a large torque.

[0003] In order to output a large torque, the motor drive device achieves this by increasing the size and volume of the motor. For example, Chinese Patent Publication CN100335400C discloses a motor drive device in which the rotor of the motor directly drives the sheave, and in order to output a large torque, the diameter of the rotor mounting part is made larger than that of the sheave, which increases the size and volume of the motor, and further increases the size and volume of the motor drive device.

[0004] As the size and volume of a motor drive device increases, it becomes more difficult to manufacture the components of the motor drive device. In addition, an enlarged motor drive device occupies a lot of space at the site where the elevator is used, which brings about many difficulties in transporting, installing, and maintaining the elevator at the site. Summary of the Invention [Problem to be solved by the invention]

[0005] The technical problem to be solved by the present invention is to provide an elevator to be pulled by a motor drive, which uses a miniaturized motor drive to output a large torque, and uses a large-diameter traction sheave and a large-diameter traction rope to improve the traction force of the traction rope, thereby meeting the needs of the application scenario of lifting a large load and running at a high speed. The use of a miniaturized motor drive not only reduces the occupied space and facilitates transportation, installation, and maintenance, but also brings great convenience to the manufacturing of components, saves raw materials, reduces the processing and assembly time, and reduces the manufacturing cost of components. [Means for solving the problem]

[0006] In order to solve the above technical problems, the elevator towed by the motor drive device provided by the present invention includes a lifting space 1001, a car 1002 and a counterweight 1003 that move up and down in the lifting space, a traction rope 1004 that suspends the car 1002 and the counterweight 1003, and a traction sheave 30 that has a traction sheave pitch circle 310 and is connected to the traction rope 1004, the rotational motion of the traction sheave 30 passes through the traction rope 1004 to lift and lower the car 1002 and the counterweight 1003, the motor drive device 1 includes a motor 10 and a gear unit 2, the motor 10 drives the traction sheave 30 to perform rotational motion through the gear unit 2, and the projection of each transmission gear of the gear unit 2 along the axial direction of the traction sheave 30 is arranged within an area surrounded by the projection of the traction sheave pitch circle 310 along the axial direction of the traction sheave 30.

[0007] Preferably, the axis of each transmission gear of the gear unit 2 and the axis 320 of the traction sheave 30 are parallel to each other.

[0008] Preferably, the axes of the transmission gears of the gear unit 2 are all stationary and parallel to the axis 320 of the traction sheave 30 .

[0009] Preferably, the gear unit 2 has N transmission gears, the axes of which are located in different planes to present a spatial configuration, where N is an integer greater than 2.

[0010] Preferably, along the axial direction of the traction sheave 30, each transmission gear of the gear unit 2 is located between the traction sheave 30 and the motor 10.

[0011] Preferably, each transmission gear of the gear unit 2 is a helical gear.

[0012] Preferably, the motor drive device 1 further includes a gear box 20, each transmission gear of the gear unit 2 is disposed in the gear box 20, and the gear box 20 supports the rotation of each transmission gear of the gear unit 2.

[0013] Preferably, the gear unit 2 includes an input transmission gear 210, an output transmission gear 220, a first intermediate transmission gear 230 and a second intermediate transmission gear 231, the input transmission gear 210 is provided with an input rotating shaft 21, the input rotating shaft 21 is provided with a first bearing 212 and a second bearing 213, the output transmission gear 220 is provided with an output rotating shaft 22, the output rotating shaft 22 is provided with a third bearing 222 and a fourth bearing 223, the first intermediate transmission gear 230, the second intermediate transmission gear 231 and the intermediate transmission rotating shaft 23 are coaxially connected and rotate integrally, the intermediate transmission rotating shaft 23 is provided with a fifth bearing 233 and a sixth bearing 234, and the gearbox 20 provides rotational support for each rotating shaft through the bearings of each rotating shaft.

[0014] Preferably, the motor 10 comprises a stationary part 11 and a rotating part 12, the rotating part 12 of the motor is coaxially connected to the input transmission gear 210 of the gear unit 2 so as to rotate integrally therewith, the traction sheave 30 is coaxially connected to the output transmission gear 220 of the gear unit 2 so as to rotate integrally therewith, and the rotational speed of the traction sheave 30 is smaller than the rotational speed of the rotating part 12 of the motor.

[0015] Preferably, the input transmission gear 210 has fewer teeth than the transmission gear meshing therewith, and the output transmission gear 220 has more teeth than the transmission gear meshing therewith.

[0016] Preferably, the projection of the rotating part 12 of the motor along the axial direction of the traction sheave 30 is located within a region surrounded by the projection of the traction sheave pitch circle 310 along the axial direction of the traction sheave 30 .

[0017] Preferably, the stationary part 11 of the motor comprises a coil 112, the projection of which along the axial direction of the traction sheave 30 is arranged within a region surrounded by the projection of the traction sheave pitch circle 310 along the axial direction of the traction sheave 30.

[0018] Preferably, the motor drive 1 comprises a brake device 40 , the brake device 40 comprising a brake stationary part 41 , a brake moving part 42 and a brake disc 43 .

[0019] Preferably, the brake disc 43 is coaxially connected to the output transmission gear 220 and rotates therewith, and the projection of the brake disc 43 along the axial direction of the traction sheave 30 is located within an area surrounded by the projection of the traction sheave pitch circle 310 along the axial direction of the traction sheave 30.

[0020] Preferably, the brake disc 43 is coaxially connected to the rotating part 12 of the motor and rotates therewith, and the projection of the brake disc 43 along the axial direction of the traction sheave 30 is located within an area surrounded by the projection of the traction sheave pitch circle 310 along the axial direction of the traction sheave 30.

[0021] In order to solve the above technical problems, the present invention provides an elevator towed by another motor-driven device, which includes a lifting space 1001, a car 1002 and a counterweight 1003 that move up and down in the lifting space, a traction rope 1004 that suspends the car 1002 and the counterweight 1003, and a traction sheave 30 that has a traction sheave pitch circle 310 and is connected to the traction rope 1004. The rotational motion of the traction sheave 30 passes through the traction rope 1004 to rotate the car 1002 and the counterweight 1003. The motor drive unit 1 is provided with a motor 10 and a gear unit 2, and the motor 10 drives the traction sheave 30 so as to perform rotational motion via the gear unit 2, and the axes of each transmission gear of the gear unit 2 and the axis 320 of the traction sheave 30 are parallel to each other, and the projections of the axes of each transmission gear along the axial direction of the traction sheave 30 are located within an area surrounded by the projection of the traction sheave pitch circle 310 along the axial direction of the traction sheave 30.

[0022] Preferably, the axes of the transmission gears of the gear unit 2 are all stationary relative to the axis 320 of the traction sheave 30 .

[0023] Preferably, the gear unit 2 has N transmission gears, the axes of which are located in different planes to present a spatial configuration, where N is an integer greater than 2.

[0024] Preferably, along the axial direction of the traction sheave 30, each transmission gear of the gear unit 2 is located between the traction sheave 30 and the motor 10.

[0025] Preferably, each transmission gear of the gear unit 2 is a helical gear.

[0026] Preferably, the gear unit 2 further includes a gear box 20, and each transmission gear of the gear unit 2 is provided in the gear box 20, and the gear box 20 supports the rotation of each transmission gear of the gear unit 2.

[0027] Preferably, the gear unit 2 includes an input transmission gear 210, an output transmission gear 220, a first intermediate transmission gear 230 and a second intermediate transmission gear 231, the input transmission gear 210 is provided with an input rotating shaft 21, the input rotating shaft 21 is provided with a first bearing 212 and a second bearing 213, the output transmission gear 220 is provided with an output rotating shaft 22, the output rotating shaft 22 is provided with a third bearing 222 and a fourth bearing 223, the first intermediate transmission gear 230, the second intermediate transmission gear 231 and the intermediate transmission rotating shaft 23 are coaxially connected and rotate integrally, the intermediate transmission rotating shaft 23 is provided with a fifth bearing 233 and a sixth bearing 234, and the gearbox 20 provides rotational support for each rotating shaft through the bearings of each rotating shaft.

[0028] Preferably, the motor 10 comprises a stationary part 11 and a rotating part 12, the rotating part 12 of the motor is coaxially connected to the input transmission gear 210 of the gear unit 2 so as to rotate integrally therewith, the traction sheave 30 is coaxially connected to the output transmission gear 220 of the gear unit 2 so as to rotate integrally therewith, and the rotational speed of the traction sheave 30 is smaller than the rotational speed of the rotating part 12 of the motor.

[0029] Preferably, the input transmission gear 210 has fewer teeth than the transmission gear meshing therewith, and the output transmission gear 220 has more teeth than the transmission gear meshing therewith.

[0030] Preferably, the projection of the rotating part 12 of the motor along the axial direction of the traction sheave 30 is located within a region surrounded by the projection of the traction sheave pitch circle 310 along the axial direction of the traction sheave 30 .

[0031] Preferably, the stationary part 11 of the motor comprises a coil 112, the projection of which along the axial direction of the traction sheave 30 is arranged within a region surrounded by the projection of the traction sheave pitch circle 310 along the axial direction of the traction sheave 30.

[0032] Preferably, the motor drive 1 comprises a brake device 40 , the brake device 40 comprising a brake stationary part 41 , a brake moving part 42 and a brake disc 43 .

[0033] Preferably, the brake disc 43 is coaxially connected to the rotating part 12 of the motor and rotates therewith, and the projection of the brake disc 43 along the axial direction of the traction sheave 30 is located within an area surrounded by the projection of the traction sheave pitch circle 310 along the axial direction of the traction sheave 30.

[0034] Preferably, the brake disc 43 is coaxially connected to the output transmission gear 220 and rotates therewith, and the projection of the brake disc 43 along the axial direction of the traction sheave 30 is located within an area surrounded by the projection of the traction sheave pitch circle 310 along the axial direction of the traction sheave 30. Effect of the Invention

[0035] In the elevator towed by the motor drive of the present invention, a miniaturized motor drive is used to output a large torque, and in compliance with the requirement of the Chinese elevator standard GB / T 7588.1-2020 that the ratio (D / d) between the pitch circle diameter of the traction sheave and the diameter of the traction rope is 40 or more, a traction sheave with a large diameter and a traction rope with a large diameter are used to improve the traction force of the traction rope, ensure that the traction rope has a sufficient service life, and meet the needs of the application scenario of lifting a large load and running at a high speed. The miniaturized motor drive brings much convenience to the manufacturing of components, saves raw materials, reduces the processing and assembly time, and reduces the manufacturing cost of components. The miniaturized motor drive reduces the size and space of the construction occupied, and also brings much convenience to the on-site transportation, installation, maintenance, etc. of the elevator. [Brief description of the drawings]

[0036] In order to more clearly explain the technical solution of the present invention, the following briefly introduces the necessary drawings of the present invention, and the drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings on the premise that they do not perform any work worthy of inventive step. [Figure 1] 1 is a schematic perspective view of an embodiment of an elevator pulled by a motor drive device of the present invention; [Diagram 2] 2 is a schematic three-dimensional view of a motor, a gear unit, and a traction sheave of the motor drive device of FIG. 1. [Diagram 3] FIG. 2 is a side view of the motor, gear unit, traction sheave, and traction rope of the motor drive device of FIG. [Figure 4] 3 is a cross-sectional view taken along CC in FIG. 2. [Diagram 5] FIG. 2 is a schematic three-dimensional view of the external configuration of the motor drive device and the traction sheave of FIG. 1. [Figure 6] FIG. 2 is a rear view of the motor drive and the traction sheave of FIG. [Figure 7] FIG. 2 is a side view of the motor drive and traction sheave of FIG. [Figure 8] 8 is a cross-sectional view taken along line AA in FIG. 7. [Figure 9] 8 is a cross-sectional view of FIG. 7 taken along line B-B. [Figure 10] FIG. 6 is a schematic three-dimensional view of the motor drive device of FIG. 5 with the gear box omitted. [Figure 11] 6 is a schematic three-dimensional view of a mounting base of the motor drive device of FIG. 5. [Figure 12] FIG. 13 is a schematic three-dimensional view of the external shape of another embodiment of the motor drive device and the traction sheave of the present invention. [Figure 13] FIG. 13 is a side view of FIG. 12. [Figure 14] 14 is a cross-sectional view taken along line AA in FIG. 13. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0037] The following clearly and completely describes the technical solutions of the present invention in combination with the drawings, and the described embodiments are not all the embodiments but only some of the embodiments of the present invention. Based on the embodiments of the present invention, on the premise that those skilled in the art do not make any inventive efforts, all other embodiments obtained fall within the protection scope of the present invention.

[0038] Example 1 As shown in Fig. 1 to 11, the elevator is towed by a motor drive device, and includes a lifting space 1001, a car 1002 that moves up and down in the lifting space, a counterweight 1003, a traction rope 1004 that suspends the car 1002 and the counterweight 1003, and a traction sheave 30 that is equipped with a traction sheave pitch circle 310 and is connected to the traction rope 1004. The rotational motion of the traction sheave 30 passes through the traction rope 1004 to lift and lower the car 1002 and the counterweight 1003. As shown in Fig. 2, the motor drive device 1 includes a motor 10 and a gear unit 2, and the motor 10 drives the traction sheave 30 so as to perform a rotational motion by the gear unit 2. As shown in Fig. 2 to 4, the diameter of the traction sheave pitch circle 310 is D, and the diameter of the traction rope 1004 is d. Preferably, the diameter ratio D / d must be 40 or more. By being connected to the traction sheave 30 , the traction rope 1004 converts the rotational motion of the traction sheave 30 into the lifting and lowering motion of the car 1002 and the counterweight 1003 .

[0039] As shown in FIGS. 2 to 8, a projection of each transmission gear of the gear unit 2 along the axial direction of the traction sheave 30 is provided within a region surrounded by a projection of a traction sheave pitch circle 310 along the axial direction of the traction sheave 30.

[0040] Preferably, as shown in FIGS. 2 and 8, the axes of the transmission gears of the gear unit 2 are stationary and parallel to the axis 320 of the traction sheave 30.

[0041] Preferably, the gear unit 2 has N transmission gears, the axes of which are located in different planes to present a spatial configuration, where N is an integer greater than 2.

[0042] Preferably, each transmission gear of the gear unit 2 includes an input transmission gear 210 , an output transmission gear 220 , a first intermediate transmission gear 230 , and a second intermediate transmission gear 231 .

[0043] Preferably, the axis 211 of the input transmission gear 210, the axis 221 of the output transmission gear 220, the axis 232 of the first intermediate transmission gear 230 and the axis 232 of the second intermediate transmission gear 231 of the gear unit 2 are located in different planes and have a spatial configuration.

[0044] As shown in FIGS. 2, 6 and 8, along the axial direction of the traction sheave 30, each transmission gear of the gear unit 2 is located between the traction sheave 30 and the motor 10.

[0045] Preferably, each transmission gear of the gear unit 2 is a helical gear.

[0046] Preferably, the motor drive device 1 further includes a gear box 20, each transmission gear of the gear unit 2 is disposed in the gear box 20, and the gear box 20 supports the rotation of each transmission gear of the gear unit 2.

[0047] Preferably, as shown in FIGS. 8 and 10, the gear unit 2 includes an input transmission gear 210, an output transmission gear 220, a first intermediate transmission gear 230 and a second intermediate transmission gear 231, The input transmission gear 210 is provided with an input rotating shaft 21, and the input rotating shaft 21 is provided with a first bearing 212 and a second bearing 213. The output transmission gear 220 is provided with an output rotating shaft 22, and the output rotating shaft 22 is provided with a third bearing 222 and a fourth bearing 223. The first intermediate transmission gear 230, the second intermediate transmission gear 231, and the intermediate transmission rotating shaft 23 are coaxially connected and rotate together. The intermediate transmission rotating shaft 23 is provided with a fifth bearing 233 and a sixth bearing 234. The gear box 20 provides rotational support for each of the rotating shafts by means of bearings for each rotating shaft.

[0048] In the elevator towed by the motor drive of this embodiment, the motor, the gear unit and the traction sheave are arranged rationally, and the gear unit is arranged three-dimensionally to reduce the space required for arranging the gears, and the gear position is arranged compactly, and the motor drive can output a stable and large torque by using a helical gear for transmission, which contributes to the miniaturization of the motor drive. The miniaturized motor drive not only reduces the space required for transportation, installation, and maintenance, but also greatly facilitates the manufacturing of components, saves raw materials, reduces the processing and assembly time, and reduces the manufacturing costs of components.

[0049] Example 2 As shown in Figures 6 and 8, in the elevator towed by the motor drive device of Example 1, the motor 10 has a stationary part 11 and a rotating part 12, the rotating part 12 of the motor is coaxially connected to the input transmission gear 210 of the gear unit 2 and rotates therewith, and the traction sheave 30 is coaxially connected to the output transmission gear 220 of the gear unit 2 and rotates therewith, and the rotational speed of the traction sheave 30 is smaller than the rotational speed of the rotating part 12 of the motor.

[0050] Preferably, the input transmission gear 210 has fewer teeth than the transmission gear meshing therewith, and the output transmission gear 220 has more teeth than the transmission gear meshing therewith.

[0051] Preferably, the projection of the rotating part 12 of the motor along the axial direction of the traction sheave 30 is located within a region surrounded by the projection of the traction sheave pitch circle 310 along the axial direction of the traction sheave 30 .

[0052] Preferably, the stationary part 11 of the motor comprises a coil 112, the projection of which along the axial direction of the traction sheave 30 is arranged within a region surrounded by the projection of the traction sheave pitch circle 310 along the axial direction of the traction sheave 30.

[0053] Preferably, the stationary part 11 of the motor comprises a motor case 111, the motor case 111 and the gearbox 20 being designed as one piece.

[0054] When the coil 112 is energized, the motor's stationary part 11 generates an electromagnetic field to drive the motor's rotating part 12, and the output torque is transmitted to the traction sheave 30 via the input rotating shaft 21, the input transmission gear 210, the first intermediate transmission gear 230, the intermediate transmission rotating shaft 23, the second intermediate transmission gear 231, the output transmission gear 220, and the output rotating shaft 22.

[0055] In the elevator pulled by the motor drive device of this embodiment, the connection between the motor and the gear unit is rationally arranged, so that the output torque of the motor is increased after being transmitted by the gear unit, and the size and volume of the motor are reduced, and the motor drive device is also reduced in size.

[0056] Example 3 As shown in FIGS. 5 to 8, in an elevator pulled by a motor drive device according to the second embodiment, the motor drive device 1 includes a braking device 40, and the braking device 40 includes a brake stationary part 41, a brake moving part 42, and a brake disk 43.

[0057] Preferably, the brake disc 43 is coaxially connected to the output transmission gear 220 and rotates therewith, and the projection of the brake disc 43 along the axial direction of the traction sheave 30 is located within an area surrounded by the projection of the traction sheave pitch circle 310 along the axial direction of the traction sheave 30.

[0058] Preferably, the brake disc 43 is connected to the output shaft 22 for coaxial rotation.

[0059] When the brake device brakes, the brake moving part 42 presses the brake disk 43 under the action of the pressing force of the spring, and the braking force is transmitted to the traction sheave 30 via the output rotating shaft 22 .

[0060] Example 4 As shown in Figures 6 and 8, in an elevator towed by a motor drive device of Example 2, the motor drive device 1 further includes a sensor 50 that feeds back rotation information of the motor, the sensor 50 having a stationary part 51 and a rotating part 52, and the sensor stationary part 51 having a main body part 51a and an attachment part 51b.

[0061] Preferably, the motor stationary part 11 comprises a motor end cap 113, the mounting part 51b of the sensor stationary part is connected to the motor end cap 113, the main body part 51a of the sensor stationary part is provided inside the inner hole 113a of the motor end cap, and the rotating part 52 of the sensor is connected to the input rotating shaft 21.

[0062] When the motor rotating part 12 rotates, rotation information is transmitted to the sensor 50 via the input rotating shaft 21 and the sensor rotating part 52, and the rotation information is fed back to the elevator control system (not shown) via the sensor 50.

[0063] Example 5 The differences between this embodiment and the third and fourth embodiments are as follows: As shown in Figures 12 to 14, the brake disc 43 is coaxially connected to the rotating part 12 of the motor and rotates integrally therewith, and the projection of the brake disc 43 along the axial direction of the traction sheave 30 is located within an area surrounded by the projection of the traction sheave pitch circle 310 along the axial direction of the traction sheave 30.

[0064] Preferably, the brake disc 43 is connected to the input shaft 21 for coaxial rotation.

[0065] The sensor stationary part 51 is connected to the brake stationary part 41 .

[0066] The mounting portion 51b of the sensor stationary portion is connected to the brake stationary portion 41, and the main body portion 51a of the sensor stationary portion is provided inside the inner hole 41a of the brake stationary portion.

[0067] When the braking device brakes, the brake moving part 42 presses the brake disk 43 under the action of the pressing force of the spring, and the braking force is transmitted to the traction sheave 30 via the input rotating shaft 21, the input transmission gear 210, the first intermediate transmission gear 230, the intermediate transmission rotating shaft 23, the second intermediate transmission gear 231, the output transmission gear 220, and the output rotating shaft 22.

[0068] In the elevator pulled by the motor drive unit of this embodiment, the connections between the braking device, the motor, and the gear unit are rationally arranged, so that the output torque of the braking device is transmitted by the gear unit, and the braking torque is increased, the size and volume of the braking device are reduced, and the motor drive unit is also reduced in size.

[0069] Example 6 As shown in FIG. 1 and FIG. 11, in the elevator towed by the motor drive device according to the first embodiment, the elevator 1000 towed by the motor drive device is as follows: A first basket return vehicle 1005, a second basket return vehicle 1006, Counterweight return vehicle 1007, A cage-side traction rope termination device 1008; A counterweight side traction rope termination device 1009 is further provided. Preferably, a mounting base 1010 is further provided, which is connected to the gear box 20 of the motor drive device 1 and supports the motor drive device 1 .

[0070] In an elevator towed by the motor drive unit of this embodiment, a compact mounting base is provided to support the motor drive unit, thereby making it possible to reduce the space occupied at the site where the elevator is used.

[0071] Example 7 The differences between this embodiment and the first embodiment are as follows: As shown in Figures 1 to 11, the axis of each transmission gear of the gear unit 2 and the axis 320 of the traction sheave 30 are parallel to each other, and the projection of the axis of each transmission gear along the axial direction of the traction sheave 30 is located within an area surrounded by the projection of the traction sheave pitch circle 310 along the axial direction of the traction sheave 30.

[0072] In an elevator pulled by the motor drive device of this embodiment, the motor drive device can be further miniaturized by further rationalizing the layout of the transmission gears of the gear units and by miniaturizing the design of the transmission gears.

[0073] Any of Examples 2 to 6 can be combined with this embodiment to form a new embodiment, and no detailed description will be given here.

[0074] The above does not limit the present invention, but is merely a preferred embodiment of the present invention. Any amendments, equivalent replacements, improvements, etc. completed within the spirit and principle of the present invention should fall within the protection scope of the present invention. [Explanation of symbols]

[0075] 1 motor drive device, 2 gear unit, 10 motor, 11 motor stationary part, 12 motor rotating part, 20 gear box, 21 input rotating shaft, 22 output rotating shaft, 23 intermediate transmission rotating shaft, 30 traction sheave, 40 brake device, 41 brake stationary part, 41a inner hole of brake stationary part, 42 brake moving part, 43 brake disk, 50 sensor, 51 sensor stationary part, 51a main body part of sensor stationary part, 51b mounting part of sensor stationary part, 52 sensor rotating part, 111 motor case, 112 coil, 113 motor end cap, 113a inner hole of motor end cap, 210 input transmission gear, 211 axis of input rotating shaft, 212 first bearing, 213 second bearing, 220 output transmission gear, 221 axis of output rotating shaft, 222 third bearing, 223 fourth bearing, 230 first intermediate transmission gear, 231 second intermediate transmission gear, 232 axis of transmission rotating shaft, 233 fifth bearing, 234 sixth bearing, 310 traction sheave pitch circle, 320 axis of traction sheave, 1000 elevator, 1001 lifting space, 1002 cage, 1003 counterweight, 1004 traction rope, 1005 first cage return wheel, 1006 second cage return wheel, 1007 counterweight return wheel, 1008 cage side traction rope termination device, 1009 counterweight side traction rope termination device, 1010 mounting base, D traction sheave pitch circle diameter, d traction rope diameter.

Claims

1. An elevator driven by a motor drive device, An elevator space (1001); A cage (1002) and a counterweight (1003) that rise and fall in a lifting space; A towing rope (1004) for suspending the cage (1002) and the counterweight (1003); a traction sheave (30) having a traction sheave pitch circle (310) and coupled to a traction rope (1004); having The rotational motion of the traction sheave (30) passes through the traction rope (1004) to raise and lower the cage (1002) and the counterweight (1003), The motor drive device (1) includes a motor (10) and a gear unit (2), The motor (10) drives the traction sheave (30) so as to produce a rotational movement through the gear unit (2); An elevator pulled by a motor-driven device, characterized in that a projection of each transmission gear of the gear unit (2) along the axial direction of the traction sheave (30) is located within an area surrounded by a projection of a traction sheave pitch circle (310) along the axial direction of the traction sheave (30).

2. 2. The elevator towed by the motor-driven device according to claim 1, characterized in that the axis of each transmission gear of the gear unit (2) and the axis (320) of the traction sheave (30) are parallel to each other.

3. The elevator towed by the motor-driven device according to claim 1, characterized in that the axes of the transmission gears of the gear unit (2) are stationary and parallel to the axis (320) of the traction sheave (30).

4. The elevator towed by the motor drive device according to any one of claims 1 to 3, characterized in that the gear unit (2) has N transmission gears, the axes of the N transmission gears being located in different planes and presenting a spatial three-dimensional arrangement, and N is an integer greater than 2.

5. The elevator towed by the motor-driven device according to claim 4, characterized in that along the axial direction of the traction sheave (30), each transmission gear of the gear unit (2) is located between the traction sheave (30) and the motor (10).

6. 6. The elevator pulled by the motor-driven device according to claim 5, characterized in that each transmission gear of the gear unit (2) is a helical gear.

7. 6. The elevator towed by the motor drive device according to claim 5, characterized in that the motor drive device (1) further comprises a gearbox (20), each transmission gear of the gear unit (2) is arranged in the gearbox (20), and the gearbox (20) supports the rotation of each transmission gear of the gear unit (2).

8. The gear unit (2) includes an input transmission gear (210), an output transmission gear (220), a first intermediate transmission gear (230) and a second intermediate transmission gear (231); The input transmission gear (210) is provided with an input rotating shaft (21), and the input rotating shaft (21) is provided with a first bearing (212) and a second bearing (213); The output transmission gear (220) is provided with an output rotating shaft (22), and the output rotating shaft (22) is provided with a third bearing (222) and a fourth bearing (223); The first intermediate transmission gear (230), the second intermediate transmission gear (231), and the intermediate transmission rotating shaft (23) are coaxially connected and rotate together. The intermediate transmission rotating shaft (23) is provided with a fifth bearing (233) and a sixth bearing (234).

8. The elevator towed by the motor-driven device according to claim 7, wherein the gearbox (20) provides rotational support for each of the rotating shafts by means of bearings for each of the rotating shafts.

9. 6. The elevator towed by the motor drive device according to claim 5, wherein the motor (10) comprises a stationary part (11) and a rotating part (12), the rotating part (12) of the motor is coaxially connected to an input transmission gear (210) of the gear unit (2) and rotates therewith, the traction sheave (30) is coaxially connected to an output transmission gear (220) of the gear unit (2) and rotates therewith, and the rotational speed of the traction sheave (30) is lower than the rotational speed of the rotating part (12) of the motor.

10. 10. The elevator towed by the motor drive device according to claim 9, wherein the number of teeth of the input transmission gear (210) is less than the number of teeth of the transmission gear meshing therewith, and the number of teeth of the output transmission gear (220) is more than the number of teeth of the transmission gear meshing therewith.

11. 10. The elevator pulled by the motor drive device according to claim 9, wherein a projection of the rotating part (12) of the motor along the axial direction of the traction sheave (30) is provided within a region surrounded by a projection of a traction sheave pitch circle (310) along the axial direction of the traction sheave (30).

12. 10. The elevator pulled by the motor drive device according to claim 9, characterized in that the stationary part (11) of the motor comprises a coil (112), the projection of which in the axial direction of the traction sheave (30) is arranged within an area surrounded by the projection of a traction sheave pitch circle (310) in the axial direction of the traction sheave (30).

13. 10. The elevator towed by the motor drive device according to claim 9, characterized in that the motor drive device (1) comprises a brake device (40), the brake device (40) comprising a brake stationary part (41), a brake moving part (42) and a brake disk (43).

14. 14. The elevator towed by the motor-driven device according to claim 13, characterized in that the brake discs (43) are coaxially connected to the output transmission gear (220) and rotate together therewith, and a projection of the brake discs (43) along the axial direction of the traction sheave (30) is provided within an area surrounded by a projection of a traction sheave pitch circle (310) along the axial direction of the traction sheave (30).

15. 14. An elevator pulled by a motor-driven device according to claim 13, characterized in that the brake discs (43) are coaxially connected to the rotating part (12) of the motor and rotate integrally therewith, and a projection of the brake discs (43) along the axial direction of the traction sheave (30) is provided within an area surrounded by a projection of a traction sheave pitch circle (310) along the axial direction of the traction sheave (30).

16. An elevator driven by a motor drive device, An elevator space (1001); A cage (1002) and a counterweight (1003) that rise and fall in a lifting space; A towing rope (1004) for suspending the cage (1002) and the counterweight (1003); a traction sheave (30) having a traction sheave pitch circle (310) and coupled to a traction rope (1004); having The rotational motion of the traction sheave (30) passes through the traction rope (1004) to raise and lower the cage (1002) and the counterweight (1003), The motor drive device (1) includes a motor (10) and a gear unit (2), the motor (10) drives a traction sheave (30) to perform rotational motion via the gear unit (2), an axis of each transmission gear of the gear unit (2) and an axis of the traction sheave (30) are parallel to each other, and a projection of the axis of each transmission gear along the axial direction of the traction sheave (30) is located within an area surrounded by a projection of a traction sheave pitch circle (310) along the axial direction of the traction sheave (30).

17. 17. The elevator towed by the motor-driven device according to claim 16, characterized in that the axes of the transmission gears of the gear unit (2) are stationary with respect to the axis (320) of the traction sheave (30).

18. 18. The elevator pulled by the motor-driven device according to claim 16 or 17, characterized in that the gear unit (2) has N transmission gears, the axes of the N transmission gears being located in different planes and presenting a spatial configuration, where N is an integer greater than 2.

19. The elevator towed by the motor-driven device according to claim 18, characterized in that along the axial direction of the traction sheave (30), each transmission gear of the gear unit (2) is located between the traction sheave (30) and the motor (10).

20. 20. The elevator pulled by a motor-driven device according to claim 19, characterized in that each transmission gear of the gear unit (2) is a helical gear.

21. The elevator pulled by the motor drive device according to claim 19, characterized in that the motor drive device (1) further comprises a gearbox (20), each transmission gear of the gear unit (2) is arranged in the gearbox (20), and the gearbox (20) supports the rotation of each transmission gear of the gear unit (2).

22. The gear unit (2) includes an input transmission gear (210), an output transmission gear (220), a first intermediate transmission gear (230) and a second intermediate transmission gear (231); The input transmission gear (210) is provided with an input rotating shaft (21), and the input rotating shaft (21) is provided with a first bearing (212) and a second bearing (213); The output transmission gear (220) is provided with an output rotating shaft (22), and the output rotating shaft (22) is provided with a third bearing (222) and a fourth bearing (223); The first intermediate transmission gear (230), the second intermediate transmission gear (231), and the intermediate transmission rotating shaft (23) are coaxially connected and rotate together. The intermediate transmission rotating shaft (23) is provided with a fifth bearing (233) and a sixth bearing (234).

22. The elevator towed by the motor-driven device according to claim 21, characterized in that the gearbox (20) provides rotational support for each of the rotating shafts by means of bearings for each of the rotating shafts.

23. 20. The elevator towed by the motor drive device according to claim 19, characterized in that the motor (10) comprises a stationary part (11) and a rotating part (12), the rotating part (12) of the motor is coaxially connected to an input transmission gear (210) of the gear unit (2) and rotates therewith, the traction sheave (30) is coaxially connected to an output transmission gear (220) of the gear unit (2) and rotates therewith, and the rotational speed of the traction sheave (30) is smaller than the rotational speed of the rotating part (12) of the motor.

24. The elevator towed by the motor drive device according to claim 23, characterized in that the number of teeth of the input transmission gear (210) is less than the number of teeth of the transmission gear meshing therewith, and the number of teeth of the output transmission gear (220) is more than the number of teeth of the transmission gear meshing therewith.

25. 24. The elevator pulled by the motor drive device according to claim 23, characterized in that the projection of the rotating part (12) of the motor along the axial direction of the traction sheave (30) is located within an area surrounded by the projection of the traction sheave pitch circle (310) along the axial direction of the traction sheave (30).

26. 24. The elevator pulled by the motor drive device according to claim 23, characterized in that the stationary part (11) of the motor comprises a coil (112), the projection of which in the axial direction of the traction sheave (30) is arranged within an area surrounded by the projection of a traction sheave pitch circle (310) in the axial direction of the traction sheave (30).

27. 24. The elevator pulled by the motor drive device according to claim 23, characterized in that the motor drive device (1) comprises a brake device (40), the brake device (40) comprising a brake stationary part (41), a brake moving part (42) and a brake disk (43).

28. 28. The elevator pulled by the motor-driven device according to claim 27, characterized in that the brake discs (43) are coaxially connected to the output transmission gear (220) and rotate together therewith, and the projection of the brake discs (43) along the axial direction of the traction sheave (30) is located within an area surrounded by the projection of a traction sheave pitch circle (310) along the axial direction of the traction sheave (30).

29. 28. An elevator pulled by a motor-driven device according to claim 27, characterized in that the brake discs (43) are coaxially connected to the rotating part (12) of the motor and rotate together therewith, and the projection of the brake discs (43) along the axial direction of the traction sheave (30) is located within an area surrounded by the projection of a traction sheave pitch circle (310) along the axial direction of the traction sheave (30).

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