Winding drum with built-in motor and external small-tooth-difference speed reducer

Abstract

The utility model discloses a winding drum with a built-in motor and an external small-tooth-difference speed reducer. The winding drum comprises the motor, a motor connecting frame, a left supporting seat, a right supporting seat, a winding drum shell and the small-tooth-difference speed reducer. Wherein the motor connecting frame, the motor, the connecting flange and the planet carrier form a penetrating type main shaft which is arranged in the winding drum shell and supported between the left supporting seat and the right supporting seat; the small-tooth-difference speed reducer comprises a center shaft, an eccentric sleeve, a planet wheel, an inner gear ring, a planet carrier, a plurality of bearings and a plurality of sealing pieces. Left and right supporting discs are arranged at the two ends of the winding drum shell and installed on the penetrating type main shaft. The motor is internally arranged, the axial size of the winding drum is shortened, and the roadway and chamber excavation cost is reduced; the small-tooth-difference speed reducer reduces the size of the motor and increases the gap between the motor and the winding drum shell, so that heat dissipation is facilitated; and the speed reducer is externally arranged and is designed in a detachable manner, so that the small-tooth-difference speed reducer can be quickly detached and is convenient to maintain. The winding drum with the built-in motor and the external small-tooth-difference speed reducer has the advantages of being good in heat dissipation performance, large in reduction ratio, simple in structure, short in axial distance, convenient to install, large in reduction ratio and the like.

Description

Technical Field

[0001] This utility model relates to a drum with a built-in motor and an external low-tooth-difference reducer, and more particularly to a drum with a built-in motor and an external low-tooth-difference reducer suitable for drive devices of hoists, winches, belt conveyors, etc. Background Technology

[0002] Hoists and belt conveyors are widely used in coal mines for both underground and surface operations. Typically, the drive units for hoists and belt conveyors use an asynchronous motor or explosion-proof asynchronous motor with a reducer and drum assembly. In this configuration, the drive unit axially comprises a mechanical system consisting of a motor, a high-speed coupling, a reducer, a low-speed coupling, and a drum assembly. This results in a long axial distance, requiring increased chamber space for underground installation. Furthermore, drive units using asynchronous motors or explosion-proof asynchronous motors with reducers are inefficient and energy-intensive.

[0003] Existing hoists and belt conveyors use direct-drive drums with permanent magnet motors. Compared to structures using asynchronous motors or explosion-proof asynchronous motors with couplings and drums, this type of drive eliminates the reducer and high-speed coupling components, resulting in a shorter axial distance, but it is still relatively long. Furthermore, the direct-drive mode requires the drive motor to output high torque at low speeds, but high-torque permanent magnet motors are bulky and inconvenient for transportation and installation in underground tunnels.

[0004] Existing drive units for hoists and belt conveyors include permanent magnet external rotor motor drums. The permanent magnet motor stator is inside, while the external rotor and drum are outside, allowing for direct drive. Compared to direct-drive drums, the axial distance is reduced by eliminating the coupling, and is only the drum length. Both non-explosion-proof and explosion-proof types are available. Non-explosion-proof drums have an air gap between the stator and external rotor, making them suitable only for surface applications and not for underground environments. Explosion-proof drums have a sealed air gap, making them suitable for both surface and underground conditions. However, currently only explosion-proof drums with a motor power not exceeding 315kW are available. In underground conditions, they are suitable for driving belt conveyors with lower loads, but struggle to meet the power requirements for driving heavy-load underground hoists.

[0005] Currently, patents for drive devices of hoists and belt conveyors that integrate motors, multi-stage reducers, or reducers inside the drum housing include "A drum with a built-in motor and multi-stage reducer (CN202321789418.6)", "A mining hoist with a built-in motor and reducer (CN202121310264.9)", and "A drum with a built-in motor (CN202123377883.2)". These patents are subject to issues such as complex structure, excessive size, and poor motor heat dissipation, or they do not comply with the relevant requirements of the "Coal Production Technology and Equipment Policy Guidelines": Underground hoisting - Prohibited - Internal gear winch used for main shaft hoisting. Utility Model Content

[0006] Technical Problem: The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a drum with a built-in motor and an external low-tooth-difference reducer. This fully utilizes the internal space of the drum, replacing the original transversely arranged drive devices of the hoist and belt conveyor outside the drum assembly—such as the motor, high-speed coupling, reducer, low-speed coupling, or low-speed, high-torque permanent magnet motor direct-drive drum, or permanent magnet external rotor motor drum, or drum with a built-in motor and multi-stage reducer—with a "built-in motor + external low-tooth-difference reducer" transmission. This makes the drum conform to relevant regulations, shortens its axial dimension, and is suitable for various drum operating conditions, thus facilitating underground transportation and installation of the equipment, while significantly reducing mining costs.

[0007] Technical Solution: To achieve the above objectives, this utility model provides a drum with a built-in motor and an external low-tooth-difference reducer, comprising a left support seat, bearing one, a motor connecting frame, a left support plate, a drum housing, a motor, a coupling, a connecting flange, a right support plate, a right support seat, and a low-tooth-difference reducer. The low-tooth-difference reducer includes a left connecting plate of an internal gear ring, an internal gear ring, a right connecting plate of an internal gear ring, a planetary gear set, a planetary carrier, a central shaft, an eccentric sleeve, bearing two, bearing three, bearing four, and multiple connecting bolts and seals. The planetary carrier includes a planetary carrier one, a pin set, a pin sleeve, and a planetary carrier two.

[0008] The motor is located inside the drum housing, and the low-tooth-difference reducer is located outside the drum. The left end of the motor stator is connected to the motor connecting frame, the right end of the motor stator is connected to the left end of the connecting flange, and the right end of the connecting flange is connected to the left end of the planetary carrier of the low-tooth-difference reducer. The connection of the motor connecting frame, the motor stator, the connecting flange, and the planetary carrier forms a main shaft that supports the drum from left to right. Each pin of the planetary carrier of the left and right through main shaft has a pin sleeve fitted on it. Each pin with a pin sleeve passes through the eccentric hole of the planetary gear set, and its left end is fixedly connected to planetary carrier one, and its right end is fixedly connected to planetary carrier two. The left end of the motor connecting frame of the left and right through main shaft is fixedly connected to the left support seat, and the right end of the planetary carrier of the left and right through main shaft is fixedly connected to the right support seat. The left support plate and the right support plate are respectively located at the left and right ends of the drum housing. The center hole of the left support plate is rotatably supported on the motor connecting frame via a bearing. The outer edge of the left support plate passes through... The motor is bolted to the drum housing; the center hole of the right support plate is bolted to the left connecting plate of the inner gear ring on the outer edge of the small tooth difference reducer, and the outer edge of the right support plate is bolted to the drum housing; the output shaft of the motor is connected to the central shaft of the small tooth difference reducer, and the central shaft is keyed to the eccentric sleeve; the center hole of each planetary gear of the planetary gear set is supported on the eccentric sleeve by a bearing, and the planetary gear set meshes with the inner gear ring; the left and right ends of the inner gear ring are respectively connected to the outer edges of the left connecting plate and the right connecting plate of the inner gear ring by screws; the inner hole of the left connecting plate of the inner gear ring is supported on the left end of the planet carrier by a bearing, and the inner hole of the right connecting plate of the inner gear ring is supported on the right end of the planet carrier by a bearing; the outer edge of the left connecting plate of the inner gear ring is bolted to the right support plate; the right end cover of the motor, the connecting flange, the left connecting plate of the inner gear ring, the inner gear ring, the right connecting plate of the inner gear ring, the planet carrier, and multiple bearings form a sealed cavity.

[0009] Sealing gaskets are provided between the right end of the motor and the left end of the connecting flange, between the outer edge of the left connecting plate of the internal gear ring and the left end of the internal gear ring, and between the right end of the internal gear ring and the outer edge of the right connecting plate of the internal gear ring.

[0010] A lip seal is provided between the right end of the connecting flange and the coupling.

[0011] Bearings and lip seals are provided between the right end of the connecting flange, the left end of the planetary carrier and the inner hole of the left connecting plate of the internal gear ring, and between the right end of the planetary carrier and the inner hole of the right connecting plate of the internal gear ring.

[0012] The output shaft of the motor is connected to a low-tooth-difference reducer via a coupling.

[0013] The planetary gear set has Z1 teeth on the planetary gears and Z2 teeth on the internal gear ring; the reduction ratio of the low-tooth-difference reducer is Z2 / (Z2-Z1).

[0014] The reduction ratio range of the aforementioned low-tooth-difference reducer is 10-100.

[0015] Beneficial Effects: Due to the adoption of the above technical solution, the drum of this utility model with its built-in motor and external low-tooth-difference reducer is adaptable to both asynchronous motors and permanent magnet motors, and is also suitable for both surface non-explosion-proof and underground explosion-proof applications. By embedding the motor within the drum housing, the axial dimension of the "motor + drum" mechanical subsystem is shortened, reducing the cost of roadway and chamber excavation. The "external low-tooth-difference reducer" is located on the outer side of the drum assembly, complying with the relevant requirements of the "Coal Production Technology and Equipment Policy Guidelines." By fully utilizing the internal space of the drum housing and using a built-in motor for transmission, the axial dimension of the drum drive device is shortened, greatly facilitating underground transportation and installation of the equipment, while significantly saving mining costs. Compared to existing hoist and belt conveyor drive devices, such as the structure of "asynchronous motor or explosion-proof asynchronous motor + reducer + drum device" and the structure of "permanent magnet motor direct-drive drum," the axial dimension is significantly shortened: the axial distance is reduced by the axial distance of the motor, high-speed coupling, reducer, and low-speed coupling, or by the axial distance of the permanent magnet motor and coupling.

[0016] Compared to the drive devices of hoists and belt conveyors that use a built-in motor direct drive method, the built-in motor direct drive method requires a larger motor size under the same working conditions (same load, speed, and drum diameter). This invention features a compact structure and ease of use. The installation of the reducer assembly not only reduces the rated speed of the motor, but also reduces the motor size and cost, and allows for adaptation to motors of any speed. The increased gap between the motor and the drum housing facilitates heat dissipation. The built-in explosion-proof motor meets the explosion-proof requirements of downhole equipment. The reducer assembly is designed to be detachable. By removing the bolts between the low-tooth-difference reducer and the right support plate, and between the right end of the motor and the connecting flange, the entire reducer assembly and the right disassembly plate can be removed from the drum housing for easy maintenance and installation. This invention has broad applicability and innovation within the technical field. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a drum structure with a built-in motor and an external low-tooth-difference reducer according to this utility model.

[0018] Figure 2 This is a disassembly diagram of a drum reducer with a built-in motor and an external low-tooth-difference reducer, according to this utility model.

[0019] In the diagram: 1. Left support seat, 2. Bearing 1, 3. Motor connecting frame, 4. Left support plate, 5. Drum housing, 6. Motor, 6-1. Motor extension shaft, 7. Coupling, 8. Connecting flange, 9. Right support plate, 10. Left connecting plate of internal gear ring, 11. Internal gear ring, 12. Right connecting plate of internal gear ring, 13. Planetary gear set, 14. Planetary carrier, 14-1. Planetary carrier 1, 14-2. Pin set, 14-3. Pin sleeve, 14-4. Planetary carrier 2, 15. Central shaft, 16. Eccentric sleeve, 17. Bearing 2, 18. Bearing 3, 19. Bearing 4, 20. Right support seat, A1. Connecting bolt 1, A2. Connecting bolt 2. Detailed Implementation

[0020] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0021] Figure 1As shown, the drum of this utility model, which has a built-in motor and an external low-tooth-difference reducer, mainly consists of a left support seat 1, a bearing 2, a motor connecting frame 3, a left support plate 4, a drum housing 5, a motor 6, a coupling 7, a connecting flange 8, a right support plate 9, a right support seat 20, and a low-tooth-difference reducer. The low-tooth-difference reducer includes a left connecting plate 10 for the internal gear ring, an internal gear ring 11, a right connecting plate 12 for the internal gear ring, a planetary gear set 13, a planetary carrier 14, a central shaft 15, an eccentric sleeve 16, a second bearing 17, a third bearing 18, a fourth bearing 19, and multiple connecting bolts and seals. The planetary carrier 14 includes a first planetary carrier 14-1, a pin set 14-2, a pin sleeve 14-3, and a second planetary carrier 14-4. The motor 6 is located inside the drum housing 5, and the low-tooth-difference reducer is located outside the drum. The left end of the stator of the motor 6 is connected to the motor connecting frame 3, the right end of the stator of the motor 6 is connected to the left end of the connecting flange 8, and the right end of the connecting flange 8 is connected to the left end of the planetary carrier 14 of the low-tooth-difference reducer. The connection of the motor connecting frame 3, the stator of the motor 6, the connecting flange 8, and the planetary carrier 14 forms a main shaft that supports the drum from left to right. Each pin of the planetary carrier 14 of the left-right through main shaft has a pin sleeve 14-3 fitted on each pin of the pin group 14-2. Each pin fitted with a pin sleeve 14-3 passes through the eccentric hole of the planetary gear group 13, and its left end is fixedly connected to the first planetary carrier 14-1, and its right end is fixedly connected to the second planetary carrier 14-4. The left end of the motor connecting bracket 3, which passes through the right main shaft, is fixedly connected to the left support seat 1. The right end of the planetary carrier 14, which passes through the left and right main shafts, is fixedly connected to the right support seat 20. The left support plate 4 and the right support plate 9 are respectively located at the left and right ends of the drum housing 5. The center hole of the left support plate 4 is rotatably supported on the motor connecting bracket 3 via bearing 2. The outer edge of the left support plate 4 is fixed to the drum housing 5 by bolts. The center hole of the right support plate 9 is fixedly connected to the left connecting plate 10 of the internal gear ring on the outer edge of the small tooth difference reducer by bolts. The outer edge of the right support plate 9 is fixed to the drum housing 5 by bolts. The output shaft 6-1 of the motor 6 is connected to the central shaft 15 of the small tooth difference reducer. The central shaft 15 is connected to the eccentric sleeve 16 by a key. The planetary gear set... Each planetary gear in the planetary gear set 13 is rotatably supported on the eccentric sleeve 16 by bearing 17. The planetary gear set 13 meshes with the internal gear ring 11. The left and right ends of the internal gear ring 11 are respectively connected to the outer edges of the left connecting plate 10 and the right connecting plate 12 by screws. The inner hole of the left connecting plate 10 is rotatably supported on the left end of the planet carrier 14 by bearing 19, and the inner hole of the right connecting plate 12 is rotatably supported on the right end of the planet carrier 14 by bearing 18. The outer edge of the left connecting plate 10 is fixed to the right support plate 9 by bolts. The right end cover of the motor 6, the connecting flange 8, the left connecting plate 10, the internal gear ring 11, the right connecting plate 12, the planet carrier 14, and multiple bearings form a sealed cavity. Sealing gaskets are provided between the right end of the motor 6 and the left end of the connecting flange 8, between the outer edge of the left connecting plate 10 of the internal gear ring and the left end of the internal gear ring 11, and between the right end of the internal gear ring 11 and the outer edge of the right connecting plate 12 of the internal gear ring.A lip seal is provided between the right end of the connecting flange 8 and the coupling 7. Bearings and lip seals are provided between the right end of the connecting flange 8, the left end of the planetary carrier 14 and the inner hole of the left connecting plate 10 of the internal gear ring, and between the right end of the planetary carrier 14 and the inner hole of the right connecting plate 12 of the internal gear ring; the reduction ratio range of the low-tooth-difference reducer is 10-100.

[0022] Working process: The output shaft 6-1 at the right end of the motor 6 is connected to the central shaft 15 and the eccentric sleeve 16 through the coupling 7. The eccentric sleeve 16 then drives the planetary gear set 13 to rotate. The planetary gear set 13 drives the internal gear ring 11 to rotate. Finally, the internal gear ring 11 drives the right support plate 9 and the drum housing 5 to rotate, thus realizing the operation.

[0023] When performing disassembly and assembly work, such as Figure 2 As shown, the connection flange and the reducer can be disassembled simply by installing or removing the connecting bolt A1 between the right end of the motor 6 and the connecting flange 8, and the connecting bolt A2 between the left connecting plate 10 of the internal gear ring of the reducer and the right support plate 9, which facilitates the repair and maintenance of the reducer.

[0024] The terms "left" and "right" used above are only for the purpose of clearly describing the location and are not intended to limit the scope of this utility model.

Claims

1. A drum with a built-in motor and an external low-tooth-difference reducer, comprising a left support seat (1), a bearing (2), a motor connecting frame (3), a left support plate (4), a drum housing (5), a motor (6), a coupling (7), a connecting flange (8), a right support plate (9), a right support seat (20), and a low-tooth-difference reducer, characterized in that: The reduced gear reducer includes a left connecting plate (10) of the internal gear ring, an internal gear ring (11), a right connecting plate (12) of the internal gear ring, a planetary gear set (13), a planetary carrier (14), a central shaft (15), an eccentric sleeve (16), a second bearing (17), a third bearing (18), a fourth bearing (19), and multiple connecting bolts and seals. The planetary carrier (14) includes a first planetary carrier (14-1), a pin set (14-2), a pin sleeve (14-3), and a second planetary carrier (14-4). The motor (6) is located inside the drum housing (5), and the reduced gear reducer is located outside the drum. The left end of the stator of the motor (6) is connected to the motor connecting frame (3), and the right end of the stator of the motor (6) is connected to the left end of the connecting flange (8). The right end of the flange (8) is connected to the left end of the planetary carrier (14) of the low-tooth-difference reducer; the connection of the motor connecting frame (3), the stator of the motor (6), the connecting flange (8), and the planetary carrier (14) forms a main shaft that supports the drum from left to right; each pin of the planetary carrier (14) of the left and right through main shaft is fitted with a pin sleeve (14-3), and each pin fitted with a pin sleeve (14-3) passes through the eccentric hole of the planetary gear set (13), with its left end fixedly connected to the first planetary carrier (14-1), and its right end fixedly connected to the second planetary carrier (14-4); the left end of the motor connecting frame (3) of the left and right through main shaft is fixedly connected to the left support seat (1), and the right end of the planetary carrier (14) of the left and right through main shaft is fixedly connected to the right support seat (20); The left support plate (4) and the right support plate (9) are respectively located at the left and right ends of the drum housing (5). The center hole of the left support plate (4) is rotatably supported on the motor connecting frame (3) via bearing one (2). The outer edge of the left support plate (4) is fixed to the drum housing (5) by bolts. The center hole of the right support plate (9) is fixed to the left connecting plate (10) of the inner gear ring on the outer edge of the small tooth difference reducer by bolts. The outer edge of the right support plate (9) is fixed to the drum housing (5) by bolts. The output shaft (6-1) of the motor (6) is connected to the central shaft (15) of the small tooth difference reducer. The central shaft (15) is connected to the eccentric sleeve (16) by a key. The center hole of each planetary gear of the planetary gear set (13) is rotatably supported on the eccentric sleeve via bearing two (17). On (16), the planetary gear set (13) meshes with the internal gear ring (11); the left and right ends of the internal gear ring (11) are respectively connected to the outer edge of the left connecting plate (10) and the outer edge of the right connecting plate (12) of the internal gear ring by screws; the inner hole of the left connecting plate (10) of the internal gear ring is rotatably supported on the left end of the planet carrier (14) by bearing four (19), and the inner hole of the right connecting plate (12) of the internal gear ring is rotatably supported on the right end of the planet carrier (14) by bearing three (18); the outer edge of the left connecting plate (10) of the internal gear ring is fixed to the right support plate (9) by bolts; the right end cover of the motor (6), the connecting flange (8), the left connecting plate (10) of the internal gear ring, the internal gear ring (11), the right connecting plate (12) of the internal gear ring, the planet carrier (14) and multiple bearings form a sealed cavity.

2. The drum with a built-in motor and an external low-tooth-difference reducer according to claim 1, characterized in that: Sealing gaskets are provided between the right end of the motor (6) and the left end of the connecting flange (8), between the outer edge of the left connecting plate (10) of the internal gear ring and the left end of the internal gear ring (11), and between the right end of the internal gear ring (11) and the outer edge of the right connecting plate (12) of the internal gear ring.

3. The drum with a built-in motor and an external low-tooth-difference reducer according to claim 1, characterized in that: A lip seal is provided between the right end of the connecting flange (8) and the coupling (7).

4. A drum with a built-in motor and an external low-tooth-difference reducer according to claim 1, characterized in that: Bearings and lip seals are provided between the right end of the connecting flange (8), the left end of the planetary carrier (14) and the inner hole of the left connecting plate (10) of the internal gear ring, and between the right end of the planetary carrier (14) and the inner hole of the right connecting plate (12) of the internal gear ring.

5. A drum with a built-in motor and an external low-tooth-difference reducer according to claim 1, characterized in that: The output shaft (6-1) of the motor (6) is connected to the low-tooth-difference reducer via a coupling (7).

6. A drum with a built-in motor and an external low-tooth-difference reducer according to claim 1, characterized in that: The number of teeth on the planetary gear set (13) is Z1, and the number of teeth on the internal gear ring (11) is Z2; the reduction ratio of the low-tooth-difference reducer is Z2 / (Z2-Z1).

7. A drum with a built-in motor and an external low-tooth-difference reducer according to claim 1, characterized in that: The reduction ratio range of the aforementioned low-tooth-difference reducer is 10-100.

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