Radial tandem elevator

Abstract

The invention provides a radial tandem type elevator. The radial tandem type elevator comprises an outer rotor motor, a planetary gear mechanism and a winding drum which are coaxially arranged from inside to outside. The planetary gear mechanism comprises a sun gear, a planetary gear, a planetary carrier and an annular gear ring; the sun gear is installed on the outer side of a rotor shell of the outer rotor motor. The multiple planetary gears are arranged on the outer side of the sun gear at intervals through a planet carrier and engaged with the sun gear. The annular gear ring is arranged on the outer side of the planetary gear and is meshed with the planetary gear; the winding drum is fixed to the outer side of the annular gear ring. According to the radial tandem elevator, the outer rotor motor and the winding drum are fused together through the planetary gear mechanism, the outer rotor motor provides power and serves as the winding drum of the elevator while serving as a motor, and the overall size of the elevator is greatly reduced; and the structure is more compact, and maintenance is convenient.

Description

Technical Field

[0001] This invention relates to a hoist, and more specifically, to a radial tandem hoist. Background Technology

[0002] Hoists are key pieces of equipment in mining and other production processes, primarily used for the vertical transport of materials and personnel. Currently, most mainstream hoists adopt an axial series layout, where the drive motor, reducer, drum, and other core components are arranged sequentially along the same axis and power is transmitted through mechanical connections such as couplings and drive shafts. While this structure is widely used, it still has the following significant drawbacks: 1. Large axial dimension and loose layout: The functional components are distributed along the axial direction, resulting in a large overall length. This makes installation and layout difficult in the limited space downhole, which is particularly unfavorable to the needs of modern intensive production and construction.

[0003] 2. The transmission chain is long and the efficiency loss is significant: the power needs to go through multiple couplings and gear transmissions, which increases the mechanical loss of the system, the overall transmission efficiency is low, and the long-term energy consumption is high.

[0004] 3. Complex assembly and maintenance: The components rely on high-precision alignment and connection, making installation and debugging difficult; when a fault occurs, they need to be disassembled in sequence, resulting in long repair cycles and high costs.

[0005] 4. Limited system stability: Long shaft structures are prone to vibration and uneven loading under load fluctuations and frequent start-stop conditions, which affects the smoothness of transmission and the service life of equipment.

[0006] Therefore, there is an urgent need for a new type of hoist that is compact, has high transmission efficiency, and is easy to maintain, in order to overcome the shortcomings of the existing axial series structure.

[0007] In order to solve the above problems, people have been seeking an ideal technological solution. Summary of the Invention

[0008] The purpose of this invention is to address the shortcomings of existing technologies by providing a radial tandem hoist that is compact in structure, highly efficient in transmission, and easy to maintain.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows: This invention provides a radial series hoist, comprising an outer rotor motor, a planetary gear mechanism, and a drum arranged coaxially from the inside to the outside; The planetary gear mechanism includes a sun gear, planetary gears, a planet carrier, and a ring gear. The sun gear is mounted on the outside of the rotor housing of the external rotor motor; a plurality of planetary gears are spaced apart on the outside of the sun gear via planet carriers and mesh with the sun gear; The ring gear is disposed on the outside of the planetary gear and meshes with the planetary gear; The drum is fixed to the outside of the ring gear.

[0010] The above solution integrates the external rotor motor and the drum together through a planetary gear mechanism. The external rotor motor serves as both the power source and the drum of the hoist, which greatly reduces the overall size of the hoist and makes the structure more compact and easier to maintain. At the same time, the external rotor motor drives the drum through only one set of gears, which improves the efficiency of the motor.

[0011] Furthermore, drum baffles are provided at both ends of the drum, and the distance from the drum baffle to the central axis of the drum is greater than the radius of the drum, so as to form a winding groove with the drum.

[0012] It is understood that the outer diameter of the drum baffle is larger than the outer diameter of the drum, so that the drum baffle forms a raised annular boundary at the end of the drum. In this way, the cylindrical surface of the drum and the baffles on both sides together form a groove-shaped coil winding area, i.e., a winding groove, which prevents the wound coil from falling off the axial side of the drum.

[0013] This invention has outstanding substantive features and significant progress compared to the prior art. Specifically, compared to the traditional axial tandem hoist, this invention has the following beneficial effects: 1. Highly integrated structure with small footprint: By radially integrating the external rotor motor, planetary gear transmission mechanism and drum, the power, deceleration and winding functions are compactly integrated, which greatly shortens the axial dimension, reduces the equipment footprint, and is more suitable for narrow production environments.

[0014] 2. Short transmission path and high energy efficiency: The rotor housing of the external rotor motor directly serves as the sun gear, and the power is transmitted to the gear ring drum through a single-stage planetary gear set, which significantly reduces intermediate transmission links, reduces friction and inertia losses, and improves the overall transmission efficiency and dynamic response performance of the system.

[0015] 3. Smooth operation and strong load-bearing capacity: The planetary gear transmission features multi-tooth meshing and even load distribution. Combined with the stable torque output of the external rotor motor, the hoist can maintain good operational stability under heavy load, frequent start-stop and speed change conditions, and extend the service life of key components.

[0016] In summary, this invention represents a significant improvement in terms of structural compactness, transmission efficiency, operational reliability, and ease of maintenance. It is applicable to various lifting scenarios and has good potential for widespread application. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the overall structure of the radial series hoist of the present invention.

[0018] Figure 2 This is a cross-sectional view of the radial series hoist of the present invention.

[0019] Figure 3 This is a cross-sectional view of the planetary gear mechanism in the radial series elevator of the present invention, which is a schematic diagram of the structure of the semi-finished product.

[0020] In the diagram: 1. Central fixed shaft; 2. Stator; 3. Rotor; 4. Drum; 5. Sun gear; 6. Planetary gear; 7. Planetary carrier; 8. Ring gear; 9. Fixed shaft support; 10. Drum baffle; 11. Rotary bearing I; 12. Rotary bearing II; 13. Rotary bearing III; 14. Rotary bearing IV. Detailed Implementation

[0021] The technical solution of the present invention will be further described in detail below through specific embodiments. Example 1

[0022] This embodiment provides a radial series hoist, such as Figure 1-3 As shown, it includes an outer rotor motor, a planetary gear mechanism, and a drum 4, which are coaxially arranged from the inside to the outside. The planetary gear mechanism includes a sun gear 5, planetary gears 6, a planet carrier 7, and a ring gear 8. The sun gear 5 is mounted on the outside of the rotor housing of the external rotor motor; a plurality of planetary gears 6 are spaced apart on the outside of the sun gear 5 via planet carriers 7 and mesh with the sun gear 5; The ring gear 8 is disposed on the outside of the planetary gear 6 and meshes with the planetary gear 6; The drum 4 is fixed to the outside of the ring gear 8.

[0023] In a specific implementation, the external rotor motor includes a stator 2 and a rotor 3 disposed outside the stator 2; the stator 2 includes an intermediate fixed shaft 1, a stator core and a stator winding wound on the stator core; the two ends of the intermediate fixed shaft 1 extend out of the outside of the drum 4 and are respectively equipped with fixed shaft brackets 9; The rotor 3 includes a rotor housing, a rotor core, and a permanent magnet disposed on the rotor core. A rotary bearing is disposed between the rotor housing and the intermediate fixed shaft 1. The rotary bearing supports the rotor 3, allowing it to rotate smoothly relative to the stator 2. In use, it is typically positioned to connect the rotor 3 to the motor's fixed shaft or fixed end cover. In this embodiment, the rotary bearing is disposed between the rotor housing and the intermediate fixed shaft 1. Figure 2Rotary bearings II 12 and III 13 are shown.

[0024] In this design, the external rotor motor, planetary gear 6 transmission mechanism, and drum 4 are radially integrated, achieving a compact fusion of power, deceleration, and winding functions. This significantly shortens the axial dimension, reduces the equipment footprint, and makes it more suitable for confined production environments. Furthermore, the rotor housing of the external rotor motor directly serves as the sun gear 5, and power is transmitted to the drum 4, which is fixed to the outside of the ring gear 8, via a single-stage planetary gear set. This significantly reduces intermediate transmission links, lowers friction and inertia losses, and improves the overall transmission efficiency and dynamic response performance of the system.

[0025] Furthermore, in practical implementation, this structure can be serialized by adjusting parameters such as motor power, gear module and number of teeth according to different lifting capacity and speed requirements, and has good engineering adaptability and scalability.

[0026] In practical implementation, key components such as stator 2, rotor 3, and gear set adopt a modular integrated layout, which is easy to assemble and disassemble and reduces the assembly accuracy requirements; during partial maintenance, there is no need to disassemble the whole, which greatly improves the maintainability and economic efficiency of the equipment.

[0027] Furthermore, the planetary gear mechanism is located at the middle position on the outer side of the rotor housing to achieve force balance.

[0028] In one embodiment, a gear mounting groove is provided at the middle position of the outer side of the rotor housing, and the sun gear 5 is installed in the gear mounting groove.

[0029] Furthermore, drum baffles 10 are provided at both ends of the drum 4. The distance from the drum baffles 10 to the central axis of the drum 4 is greater than the radius of the drum 4, so as to form a winding groove with the drum 4. Specifically, the drum baffles 10 have a disc-shaped structure and are fixedly connected to the intermediate fixed shaft 1 through rotating bearings I 11 and IV 14.

[0030] It is understood that the outer diameter of the drum baffle 10 is larger than the outer diameter of the drum 4, so that the drum baffle 10 forms a raised annular boundary at the end of the drum 4. In this way, the cylindrical surface of the drum 4 and the baffles on both sides together form a groove-shaped coil winding area, i.e., a winding groove, which prevents the wound coil (such as cable, rope, fabric, etc.) from falling off from the axial side of the drum 4.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A radial series hoist, characterized in that: It includes an external rotor motor, a planetary gear mechanism, and a drum, all coaxially arranged from the inside out. The planetary gear mechanism includes a sun gear, planetary gears, a planet carrier, and a ring gear. The sun gear is mounted on the outside of the rotor housing of the external rotor motor; a plurality of planetary gears are spaced apart on the outside of the sun gear via planet carriers and mesh with the sun gear; the ring gear is disposed on the outside of the planetary gears and meshes with the planetary gears; The drum is fixed to the outside of the ring gear and rotates under the drive of the ring gear.

2. The radial series hoist according to claim 1, characterized in that: The drum is also provided with drum baffles at both ends. The distance from the drum baffles to the central axis of the drum is greater than the radius of the drum, so as to form a winding groove with the drum.

3. The radial series hoist according to claim 1 or 2, characterized in that: The external rotor motor includes a stator and a rotor disposed outside the stator; the stator includes a central fixed shaft, a stator core, and a stator winding wound on the stator core; the two ends of the central fixed shaft extend outward from the outside of the drum and are respectively equipped with fixed shaft brackets. The rotor includes a rotor housing, a rotor core, and a permanent magnet disposed on the rotor core. A rotary bearing is disposed between the rotor housing and the intermediate fixed shaft.

4. The radial series hoist according to claim 3, characterized in that: The planetary gear mechanism is located at the middle position on the outer side of the rotor housing.

5. The radial tandem hoist according to claim 3, characterized in that: A gear mounting groove is provided at the middle of the outer side of the rotor housing, and the sun gear is installed in the gear mounting groove.

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