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

Abstract

The invention 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] The invention relates to a drum with a built-in motor and an external speed reducer with a small tooth difference, in particular to a drum with a built-in motor and an external speed reducer with a small tooth difference, which is suitable for a driving device of a hoist, a winch, a belt conveyor and the like. Background Art

[0002] Hoists and belt conveyors are widely used in coal mines to achieve underground and above-ground operations. Usually, the drive devices of hoists and belt conveyors often use asynchronous motors or explosion-proof asynchronous motors with speed reducers and reels. In this mode, the drive devices of hoists and belt conveyors axially include a mechanical system of "motor + high-speed end coupling + speed reducer + low-speed end coupling + reel", with a long axial distance, and the underground installation and use requires a larger chamber space; and the drive devices using asynchronous motors or explosion-proof asynchronous motors with speed reducers have low efficiency and high energy consumption.

[0003] The existing drive devices of hoists and belt conveyors include permanent magnet motor direct drive drums. Compared with the structure of using asynchronous motors or explosion-proof asynchronous motors plus couplings plus drum devices, this type of drive device removes the reducer part and the high-speed end coupling part, and the axial distance is shortened, but the distance is still long; and the output of the drive motor is required to be high torque and low speed in the direct drive mode, but the high-torque permanent magnet motor is large in size and is not convenient for transportation and installation in underground tunnels.

[0004] The existing driving devices of hoists and belt conveyors include permanent magnet outer rotor motor drums. The permanent magnet motor has a stator inside and an outer rotor and drum outside, which can be driven directly. Compared with the permanent magnet motor direct drive drum, the coupling part is subtracted axially, and the axial distance is only the length of the drum. There are two types: non-explosion-proof and explosion-proof. There is an air gap between the stator and the outer rotor of the non-explosion-proof permanent magnet outer rotor motor drum, which can only be used above the well and is not suitable for underground environments. The explosion-proof permanent magnet outer rotor motor drum has the air gap sealed and can be used in underground and above-well conditions, but currently there are only explosion-proof drums with motor power not exceeding 315kW. Under underground conditions, it is suitable for the driving device of belt conveyors with lower loads, but it is difficult to meet the power requirements when used for the driving device of underground hoists with large loads.

[0005] At present, the patents for the driving devices of hoists and belt conveyors that have motors, multi-stage reducers or reducers built into the drum shell include "A drum with a built-in motor and multi-stage reducer (CN202321789418.6)", "A mining hoist with a built-in motor and reducer in the drum (CN202121310264.9)", and "A drum with a built-in motor (CN202123377883.2)". These patents do not meet the relevant requirements of the "Policy Guidelines for Coal Production Technology and Equipment" due to their complex structure, large size, poor motor heat dissipation and other problems: Underground lifting - Prohibited category - Internal gear winch for main shaft lifting. Summary of the invention

[0006] Technical problem: The purpose of the present invention is to overcome the shortcomings of the prior art and provide a reel with a built-in motor and an external small-tooth difference reducer, making full use of the internal space of the reel, and replacing the electric motor, high-speed end coupling, reducer, low-speed end coupling, or low-speed, high-torque permanent magnet motor direct-drive reel, or permanent magnet outer rotor motor reel, or a reel with a built-in motor and a multi-stage reducer that were originally arranged horizontally on the outside of the reel device with "built-in motor + external small-tooth difference reducer" to achieve transmission, so that the reel complies with relevant regulations, has a shortened axial size, and is suitable for a variety of reel working conditions, thereby facilitating the underground transportation and installation of the equipment, and greatly saving mining costs.

[0007] Technical solution: To achieve the above purpose, a reel with a built-in motor and an external small-tooth difference reducer of the present invention comprises a left support seat, a bearing 1, a motor connecting frame, a left support plate, a reel housing, a motor, a coupling, a connecting flange, a right support plate, a right support seat and a small-tooth difference reducer, wherein the small-tooth difference reducer comprises an inner gear ring left connecting plate, an inner gear ring, an inner gear ring right connecting plate, a planetary gear set, a planetary carrier, a center shaft, an eccentric sleeve, a bearing 2, a bearing 3, a bearing 4 and a plurality of connecting bolts and seals, and the planetary carrier comprises a planetary carrier 1, a pin set, a pin sleeve and a planetary carrier 2;

[0008] The motor is arranged inside the drum shell, and the small-tooth difference reducer is arranged outside the drum; the left end of the motor's stator is connected to the motor connecting frame, the right end of the motor's 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 small-tooth difference reducer; the connection composition of the motor connecting frame, the motor's stator, the connecting flange, and the planetary carrier supports the main shaft that passes through the drum left and right; each pin of the pin group of the planetary carrier that passes through the main shaft left and right is sleeved with a pin sleeve, and each pin with a pin sleeve passes through the eccentric hole of the planetary gear set, and the left end is fixedly connected to the planetary carrier one, and its right end is fixedly connected to the planetary carrier two; the left end of the motor connecting frame that passes through the main shaft left and right is fixedly connected to the left supporting seat, and the right end of the planetary carrier that passes through the main shaft left and right is fixedly connected to the right supporting seat; the left supporting plate and the right supporting plate are respectively arranged at the left and right ends of the drum shell, and the center hole of the left supporting plate is slewingly supported on the motor connecting frame through a bearing, and the outer edge of the left supporting plate is passed through The gear is fixed to the drum housing by bolts; the center hole of the right supporting plate is connected to the left connecting plate of the inner gear ring on the outer edge of the small-tooth difference reducer by bolts, and the outer edge of the right supporting plate is fixed to the drum housing by bolts; the output shaft of the motor is connected to the central axis of the small-tooth difference reducer, and the central axis is fixed to the eccentric sleeve by a key; the center hole of each planetary gear of the planetary gear set is supported on the eccentric sleeve by bearing two rotations, and the planetary gear set is meshed with the inner gear ring; the left and right ends of the inner gear ring are respectively connected to the outer edge of the left connecting plate of the inner gear ring and the outer edge of 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 bearing four rotations, 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 bearing three rotations; the outer edge of the left connecting plate of the inner gear ring is fixed to the right supporting plate by bolts; 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 chamber.

[0009] Sealing gaskets are arranged 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 inner gear ring and the left end of the inner gear ring, and between the right end of the inner gear ring and the outer edge of the right connecting plate of the inner gear ring.

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

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

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

[0013] The number of teeth of the planetary gears of the planetary gear set is Z1, and the number of teeth of the inner ring gear is Z2; the reduction ratio of the small-tooth difference reducer is Z2 / (Z2-Z1).

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

[0015] Beneficial effect: Due to the adoption of the above technical scheme, the drum with built-in motor and external small-tooth difference reducer of the present invention is suitable for asynchronous motor and permanent magnet motor, and is also suitable for non-explosion-proof on the well and explosion-proof underground. The motor is built into the drum shell, which shortens the axial size of the "motor + drum" mechanical subsystem and reduces the excavation cost of tunnels and chambers; the "external small-tooth difference reducer" is on the external side of the drum assembly, which meets the relevant requirements of the "Coal Production Technology and Equipment Policy Guide"; the internal space of the drum shell is fully utilized, and the built-in motor is used to realize the transmission, so that the axial size of the drum drive device is shortened, which is very convenient for the underground transportation and installation of the equipment, and greatly saves the mining cost. Compared with the existing drive devices of hoists and belt conveyors, 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 size is significantly shortened: the axial distance of the motor, high-speed end coupling, reducer, and low-speed end coupling is subtracted, or the axial distance of the permanent magnet motor and the coupling is subtracted.

[0016] Compared with the driving device of the hoist and belt conveyor which adopts the built-in motor direct drive mode, "a drum with a built-in motor", compared with the present invention, under the same working conditions (same load, speed, and drum diameter), the built-in direct drive mode requires a larger motor volume. The present invention has a compact structure and is easy to use. The installation of the reducer assembly not only reduces the rated speed of the motor, reduces the size of the motor, and reduces the cost of the motor, but also adapts to motors of any speed. The gap between the machine and the drum housing is increased, which is convenient for heat dissipation. The built-in explosion-proof motor meets the explosion-proof requirements of downhole equipment. The reducer assembly is designed to be detachable. The bolts between the small-tooth difference reducer and the right supporting disk and between the right end of the motor and the connecting flange are removed, and the reducer component as a whole and the right disassembly disk can be removed from the drum housing for easy maintenance and installation. The present invention has extensive practicality and innovation in the technical field. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a drum structure of a built-in motor and an external small-tooth difference reducer of the present invention.

[0018] Figure 2 It is a schematic diagram of disassembling a drum reducer with a built-in motor and an external small-tooth difference reducer according to the present invention.

[0019] In the figure: 1, left supporting seat, 2, bearing one, 3, motor connecting frame, 4, left supporting plate, 5, reel housing, 6, motor, 6-1, motor extension shaft, 7, coupling, 8, connecting flange, 9, right supporting plate, 10, left connecting plate of inner ring gear, 11, inner ring gear, 12, right connecting plate of inner ring gear, 13, planetary gear set, 14, planetary carrier, 14-1, planetary carrier one, 14-2, pin group, 14-3, pin sleeve, 14-4, planetary carrier two, 15, center shaft, 16, eccentric sleeve, 17, bearing two, 18, bearing three, 19, bearing four, 20, right supporting seat, A1, connecting bolt one, A2, connecting bolt two. DETAILED DESCRIPTION

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

[0021] Figure 1As shown, a reel with a built-in motor and an external small-tooth difference reducer of the present invention is mainly composed of a left support seat 1, a bearing 2, a motor connecting frame 3, a left support plate 4, a reel housing 5, a motor 6, a coupling 7, a connecting flange 8, a right support plate 9, a right support seat 20 and a small-tooth difference reducer. The small-tooth difference reducer includes an inner gear ring left connecting plate 10, an inner gear ring 11, an inner gear ring right connecting plate 12, a planetary gear set 13, a planetary carrier 14, a central shaft 15, an eccentric sleeve 16, a bearing 2 17, a bearing 3 18, a bearing 4 19 and a plurality of connecting bolts and seals. The planetary carrier 14 includes a planetary carrier 1 14-1, a pin group 14-2, a pin sleeve 14-3 and a planetary carrier 2 14-4; the motor 6 is arranged inside the reel housing 5, and the small-tooth differential reducer is arranged outside the reel; 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 small-tooth differential reducer; the connection composition of the motor connecting frame 3, the stator of the motor 6, the connecting flange 8, and the planetary carrier 14 supports the main shaft that passes through the reel left and right; each pin of the pin group 14-2 of the planetary carrier 14 that passes through the main shaft left and right is covered with a pin sleeve 14-3, and each pin covered with a pin sleeve 14-3 passes through the eccentric hole of the planetary gear set 13, and its left end is fixedly connected to the planetary carrier 1 14-1, and its right end is fixedly connected to the planetary carrier 2 14-4; the left and right The left end of the motor connecting frame 3 that passes through the main shaft is fixedly connected to the left supporting seat 1, and the right end of the planetary frame 14 that passes through the main shaft on the left and right is fixedly connected to the right supporting seat 20; the left supporting plate 4 and the right supporting plate 9 are respectively arranged on the left and right ends of the reel shell 5, and the center hole of the left supporting plate 4 is rotatably supported on the motor connecting frame 3 through a bearing 2, and the outer edge of the left supporting plate 4 is fixed to the reel shell 5 by bolts; the center hole of the right supporting plate 9 is fixedly connected to the left connecting plate 10 of the inner gear ring on the outer edge of the small-tooth difference reducer by bolts, and the outer edge of the right supporting plate 9 is fixed to the reel shell 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, and the central shaft 15 is connected to the eccentric sleeve 16 by a key; the planetary gear set The center hole of each planetary gear of 13 is rotatably supported on the eccentric sleeve 16 through the second bearing 17, and the planetary gear set 13 is meshed with the inner gear ring 11; the left and right ends of the inner gear ring 11 are respectively connected to the outer edges of the left connecting plate 10 of the inner gear ring and the outer edges of the right connecting plate 12 of the inner gear ring by screws; the inner hole of the left connecting plate 10 of the inner gear ring is rotatably supported on the left end of the planet carrier 14 through the fourth bearing 19, and the inner hole of the right connecting plate 12 of the inner gear ring is rotatably supported on the right end of the planet carrier 14 through the third bearing 18; the outer edge of the left connecting plate 10 of the inner gear ring is fixedly connected to the right supporting plate 9 by bolts; the right end cover of the motor 6, the connecting flange 8, the left connecting plate 10 of the inner gear ring, the inner gear ring 11, the right connecting plate 12 of the inner gear ring, the planet carrier 14 and multiple bearings form a sealed chamber. 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 inner gear ring left connecting plate 10 and the left end of the inner gear ring 11 , and between the right end of the inner gear ring 11 and the outer edge of the inner gear ring right connecting plate 12 .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 planet carrier 14 and the inner hole of the left connecting plate 10 of the inner gear ring, and between the right end of the planet carrier 14 and the inner hole of the right connecting plate 12 of the inner gear ring. The reduction ratio range of the small-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 to rotate, and the eccentric sleeve 16 drives the planetary gear set 13 to rotate, the planetary gear set 13 drives the inner ring gear 11 to rotate, and the inner ring gear 11 finally drives the right supporting plate 9 and the reel shell 5 to rotate to realize the work.

[0023] When disassembling or assembling, Figure 2 As shown, it is only necessary to install and disassemble the connecting bolts A1 between the right end of the motor 6 and the connecting flange 8, and the connecting bolts A2 between the left connecting plate 10 of the inner gear ring of the small-tooth difference reducer and the right supporting plate 9, to complete the disassembly of the connecting flange and the small-tooth difference reducer, making it convenient to repair and maintain the reducer.

[0024] The terms “left” and “right” mentioned above are only used to clearly describe the directions and are not used to limit the present invention.

Claims

1. A reel with a built-in motor and an external small-tooth differential reducer, comprising a left support seat (1), a bearing 1 (2), a motor connecting frame (3), a left support plate (4), a reel housing (5), a motor (6), a coupling (7), a connecting flange (8), a right support plate (9), a right support seat (20) and a small-tooth differential reducer, characterized in that: The small-tooth differential reducer comprises a left connecting plate (10) of an inner gear ring, an inner gear ring (11), a right connecting plate (12) of an inner 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 a plurality of connecting bolts and seals; the planetary carrier (14) comprises 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 arranged inside the drum housing (5), and the small-tooth differential reducer is arranged 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 connecting flange (8) is connected to the motor connecting frame (3). The right end of the flange (8) is connected to the left end of the planetary frame (14) of the small-tooth differential reducer; the motor connecting frame (3), the stator of the motor (6), the connecting flange (8), and the planetary frame (14) are connected to form a main shaft that supports the reel to pass through left and right; each pin of the pin group (14-2) of the planetary frame (14) that passes through the main shaft left and right is sleeved with a pin sleeve (14-3), and each pin sleeved with a pin sleeve (14-3) passes through the eccentric hole of the planetary gear group (13), and the left end is fixedly connected to the planetary frame 1 (14-1), and the right end is fixedly connected to the planetary frame 2 (14-4); the left end of the motor connecting frame (3) that passes through the main shaft left and right is fixedly connected to the left support seat (1), and the right end of the planetary frame (14) that passes through the main shaft left and right is fixedly connected to the right support seat (20); The left support plate (4) and the right support plate (9) are respectively arranged at the left and right ends of the winding drum housing (5); the center hole of the left support plate (4) is rotatably supported on the motor connecting frame (3) through a bearing 1 (2); the outer edge of the left support plate (4) is fixed to the winding drum housing (5) by bolts; the center hole of the right support plate (9) is connected to the left connecting plate (10) of the inner gear ring on the outer edge of the small-tooth difference reducer by bolts, and the outer edge of the right support plate (9) is fixed to the winding drum housing (5) by bolts; the output shaft (6-1) of the motor (6) is connected to the center shaft (15) of the small-tooth difference reducer, and the center shaft (15) is connected to the eccentric sleeve (16) by a key; the center hole of each planetary wheel of the planetary gear set (13) is rotatably supported on the eccentric sleeve through a bearing 2 (17). (16), the planetary gear set (13) is meshed with the inner gear ring (11); the left and right ends of the inner gear ring (11) are respectively connected to the outer edges of the inner gear ring left connecting plate (10) and the inner gear ring right connecting plate (12) by screws; the inner hole of the inner gear ring left connecting plate (10) is rotatably supported on the left end of the planet carrier (14) through bearing four (19), and the inner hole of the inner gear ring right connecting plate (12) is rotatably supported on the right end of the planet carrier (14) through bearing three (18); the outer edge of the inner gear ring left connecting plate (10) is fixedly connected to the right supporting plate (9) by bolts; the right end cover of the motor (6), the connecting flange (8), the inner gear ring left connecting plate (10), the inner gear ring (11), the inner gear ring right connecting plate (12), the planet carrier (14) and a plurality of bearings form a sealed chamber.

2. A reel with a built-in motor and an external small-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 inner gear ring left connecting plate (10) and the left end of the inner gear ring (11), and between the right end of the inner gear ring (11) and the outer edge of the inner gear ring right connecting plate (12).

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

4. The reel with a built-in motor and an external small-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 planet carrier (14) and the inner hole of the left connecting plate (10) of the inner gear ring, and between the right end of the planet carrier (14) and the inner hole of the right connecting plate (12) of the inner gear ring.

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

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

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

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