A built-in symmetrical double-output shaft star gear reducer and its permanent magnet direct drive device

Abstract

The present invention discloses a built-in symmetrical double-output shaft planetary gear reducer and a permanent magnet direct drive device thereof, comprising a planetary gear reducer body, a shaft sleeve is provided on one side of the planetary gear reducer body, a flat key is provided on one side of the shaft sleeve, a flange is provided on one side of the planetary gear reducer body, a front end cover is provided on one side of the flange, a front support plate is provided on one side of the front end cover, an oil seal is provided inside the planetary gear reducer body, an oil seal sleeve is provided on one side of the oil seal, the flat key is connected to an input shaft through the oil seal sleeve, and a distance ring is provided outside the input shaft. The planetary gear reducer of the present invention has a small volume, light weight, and a compact structure, and is particularly suitable for installation inside a reel, has a high speed, and has a large output torque. It is installed inside the reel and does not occupy the external space of the lifting mechanism. The end connection flange of the reel is used as the installation reference surface and support, so that both ends can be input shafts. The direct drive mechanism is a left and right base installation type with high coaxiality.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical equipment, and in particular to a built-in symmetrical double-output shaft star gear reducer and a permanent magnet direct drive device thereof. Background Art

[0002] Traditional reducers have one-end input and one-end output, poor usability, large size, complex structure, and cannot perform double-end double-symmetrical input. Traditional crane lifting mechanisms, including winch-type lifting mechanisms and "electric hoist" type lifting mechanisms, are composed of external motors, brakes, couplings and parallel shaft reducers, with a "U"-shaped layout, complex overall structure, high energy consumption, and cannot achieve simple direct drive. Usually, winch-type lifting mechanisms are high-working-level, complex transmission lifting mechanisms with large dimensions and heavy weight. Although "electric hoist" type lifting mechanisms are lighter in weight and relatively smaller in size, they are usually used at a lower working level.

[0003] The existing permanent magnet direct drive mechanism can overcome the above-mentioned technical drawbacks of traditional lifting, and has superior performance and many advantages that traditional lifting mechanisms cannot achieve. However, the gearless outer rotor permanent magnet direct drive mechanism has a relatively high cost problem in small lifting mechanisms and lifting mechanisms below 32 tons. Therefore, a permanent magnet direct drive mechanism with a new type of reduction transmission device that is between the gearless permanent magnet direct drive and the traditional lifting mechanism, with a compact structure, light weight, high working level, energy saving and moderate cost, needs to be developed urgently. Therefore, it is urgent to design a built-in symmetrical double-output shaft star gear reducer and its permanent magnet direct drive device to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art and to propose a built-in symmetrical double-output shaft star gear reducer and a permanent magnet direct drive device thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A built-in symmetrical double-output shaft planetary gear reducer comprises a planetary gear reducer body, a shaft sleeve is provided on one side of the planetary gear reducer body, a flat key is provided on one side of the shaft sleeve, a flange is provided on one side of the planetary gear reducer body, and a front end cover is provided on one side of the flange, a front supporting plate is provided on one side of the front end cover, an oil seal is provided inside the planetary gear reducer body, an oil seal sleeve is provided on one side of the oil seal, the flat key is connected to the input shaft through the oil seal sleeve, a distance ring is provided on the outside of the input shaft, an eccentric sleeve is provided on one side of the distance ring, and a cylindrical roller bearing is provided on one side of the distance ring, a front supporting plate is provided on one side of the flange, a planetary gear is provided on one side of the front supporting plate, the front end cover is connected to the internal gear through a hexagon socket screw, a bushing is provided inside the planetary gear reducer body, a rear supporting plate is provided on one side of the front supporting plate, connecting holes are provided inside the rear supporting plate, and three planetary gear shafts are supported in the connecting holes.

[0007] Furthermore, the planetary gear is meshed with the internal gear, and both sides of the planetary reducer body can serve as input ends.

[0008] Furthermore, the rear support plate is connected to the motor seat via an internal threaded cylindrical pin, a rear end cover is provided on one side of the motor seat, a positioning ring is provided inside the planetary reducer body, and an elastic retaining ring for a hole is provided on one side of the cylindrical roller bearing.

[0009] A built-in symmetrical double-output shaft planetary reducer and a permanent magnet direct drive device thereof, comprising a left base, a right base, a drum and a planetary reducer body, characterized in that the planetary reducer body is connected to one side of the inside of the drum through a flange, one side of the left base is welded to one side of the drum, the other side of the drum is welded to one side of the right base, the top of the left base is connected to a brake by bolts, and the other side of the inside of the drum is connected to a motor by bolts.

[0010] Furthermore, reel assemblies are provided on both sides of the planetary reducer body, and a coupling is provided on one side of the planetary reducer body.

[0011] Furthermore, one side of the motor is connected to one side of the planetary reducer body through a coupling, and the other side of the motor is connected to one side of the right base through bolts. A support ring is arranged between the coupling and the motor, a bearing is arranged on one side of the right base, and a height limiter is connected to one side of the right base through bolts.

[0012] Furthermore, a guide rod assembly is provided on the other side of the drum, one side of the guide rod assembly is connected to a rope guide via bolts, a rope pressing device is provided on one side of the drum, and a positioning rod assembly is provided on one side of the drum.

[0013] The beneficial effects of the present invention are:

[0014] The star gear reducer is small in size, light in weight and compact in structure. It is particularly suitable for installation inside the drum. It has high speed and a single-stage reducer can achieve a maximum speed ratio of i=90 or less. It has a large output torque and is installed inside the drum without occupying the external space of the lifting mechanism. The end connecting flange of the drum is used as the installation reference surface and support, so that both ends can be input shafts (symmetrical input). The outer shell of the star gear reducer outputs torque, and the front supporting disk is specially designed. It is both the assembly base of the entire star gear reducer and the load-bearing base (connected to the external supporting seat of the lifting mechanism). The rear supporting disk is specially designed and has three holes in the inner part. The holes support three eccentric star wheel shafts. The output of the outer shell must be attached to the drum to achieve rotation and torque input. The two end faces have double symmetrical input, which makes it very convenient to achieve double braking, that is, one brake on each side, because the braking torque at both ends is the same (relative to the outer circle output, sharing the common reducer ratio). As for braking , can be single brake or double brake, for example, the outside uses brakes (wheel brakes or disc brakes), and the inside uses brake motors (motor bodies with disc brakes). Compared with traditional lifting mechanisms with corresponding parameters, it has smaller size and more compact structure, which can reduce the size of the lifting trolley, reduce the left and right limit dimensions of the lifting trolley's operation, and increase the effective operating area of ​​the crane within the span. As a special type of planetary reducer, the planetary reducer has high transmission efficiency, high load-bearing capacity, compact structure, smooth transmission, and low noise. The motor has the characteristics of matching the load, can greatly save energy, and has low noise. Compared with traditional lifting mechanisms with corresponding parameters, it has lighter weight, which can reduce the weight of the lifting trolley, reduce the wheel pressure of the lifting trolley, and increase the fatigue life of the crane steel structure. The transmission chain is shorter, the loss is less, and the transmission efficiency is higher. Compared with the traditional U-shaped lifting mechanism, which requires multiple bases to be installed, the direct drive mechanism is a left and right base installation type with high coaxiality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The structure diagram of a built-in symmetrical double-output shaft star gear reducer and its permanent magnet direct drive device proposed by the present invention Figure 1 ;

[0016] Figure 2 The structure diagram of a built-in symmetrical double-output shaft star gear reducer and its permanent magnet direct drive device proposed by the present invention Figure 2 ;

[0017] Figure 3 The structure diagram of a built-in symmetrical double-output shaft star gear reducer and its permanent magnet direct drive device proposed by the present invention Figure 3 ;

[0018] Figure 4This is a schematic diagram of the structure of a planetary gear reducer with a built-in symmetrical double-output shaft and a permanent magnet direct drive device thereof proposed by the present invention;

[0019] Figure 5 This is a front view of a planetary gear of a built-in symmetrical double-output shaft planetary gear reducer and a permanent magnet direct drive device thereof proposed by the present invention;

[0020] Figure 6 This is a front view of the internal gear of a built-in symmetrical double-output shaft planetary gear reducer and a permanent magnet direct drive device thereof proposed by the present invention;

[0021] Figure 7 This is a front view of the flange of a built-in symmetrical double-output shaft star gear reducer and its permanent magnet direct drive device proposed by the present invention.

[0022] In the figure: 1 left base, 2 brake, 3 planetary gear reducer, 4 drum assembly, 5 coupling, 6 support ring, 7 motor, 8 rope pressing device, 9 bearing, 10 right base, 11 height limiter, 12 guide rod assembly, 13 rope guide, 14 positioning rod assembly, 15 drum, 16 planetary gear shaft, 17 bushing, 18 bushing, 19 flange, 20 front end cover, 21 front support plate, 22 distance ring, 23 eccentric sleeve, 24 planetary gear, 25 internal gear, 26 rear support plate, 27 rear end cover, 28 motor seat, 29 positioning ring, 30 oil seal sleeve, 31 input shaft, 32 oil seal. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0026] Please also see Figures 1 to 7 A built-in symmetrical double-output shaft planetary reducer comprises a planetary reducer body 3, a shaft sleeve 18 is arranged on one side of the planetary reducer body 3, a flat key 33 is arranged on one side of the shaft sleeve 18, a flange 19 is arranged on one side of the planetary reducer body 3, a front end cover 20 is arranged on one side of the flange 19, a front support plate 21 is arranged on one side of the front end cover 20, an oil seal 32 is arranged inside the planetary reducer body 3, an oil seal sleeve 30 is arranged on one side of the oil seal 32, the flat key 33 is connected to an input shaft 31 through the oil seal sleeve 30, a distance ring 22 is arranged outside the input shaft 31, an eccentric sleeve 23 is arranged on one side of the distance ring 22, and a cylindrical roller bearing is arranged on one side of the distance ring 22, the flange 19 A front supporting plate 21 is provided on one side, a planetary gear 24 is provided on one side of the front supporting plate 21, the front end cover 20 is connected to the internal gear 25 by an inner hexagonal screw, a bushing 17 is provided inside the planetary reducer body 3, a rear supporting plate 26 is provided on one side of the front supporting plate 21, connecting holes are provided inside the rear supporting plate 26, and three planetary shafts 16 are supported in the connecting holes, both ends of the planetary reducer body 3 can be used as input ends, and the output end of the planetary reducer body 3 is at the edge, that is, the outer wall of the internal gear 25. As a special type of planetary reducer, the planetary reducer body 3 has high transmission efficiency, high load-bearing capacity, compact structure, smooth transmission, low noise, a large speed ratio range and a wide transmission ratio.

[0027] Furthermore, the planetary gear 24 is meshed with the internal gear 25, and both sides of the planetary reducer body 3 can be used as input ends. The planetary reducer body 3 can be coaxially input with the motor 7 and has an outer gear ring circular output transmission mode, and can be built into the drum 15 together with the motor 7, so that the motor 7, the planetary reducer body 3 and the drum 15 are integrated in appearance, greatly reducing the volume and weight of the lifting mechanism.

[0028] Furthermore, the rear support plate 26 is connected to the motor seat 28 through an internal threaded cylindrical pin, a rear end cover 27 is provided on one side of the motor seat 28, a positioning ring 29 is provided inside the planetary reducer body 3, and a hole elastic retaining ring is provided on one side of the cylindrical roller bearing.

[0029] A built-in symmetrical double-output shaft star gear reducer and a permanent magnet direct drive device thereof, comprising a left base 1, a right base 10, a drum 15 and a star gear reducer body 3, characterized in that the star gear reducer body 3 is connected to one side of the drum 15 through a flange 19, one side of the left base 1 is welded to one side of the drum 15, and the other side of the drum 15 is welded to one side of the right base 10, and the top of the left base 1 is connected with a brake 2 through bolts, and the internal magnetic field of the motor 7 can maintain the instantaneous torque corresponding to the load. At this time, the motor magnetic field is equivalent to a holding effect. At this time, braking is equivalent to reducing the friction between the brake wheel and the brake 2, delaying the service life of the brake 2 The other side of the drum 15 is connected with an electric motor 7 by bolts. The planetary reducer 3 is a special type of planetary reducer with high transmission efficiency, high load-bearing capacity, compact structure, smooth transmission, low noise, large speed ratio range and wide transmission ratio. The left base 1 and the right base 10 are installed on the lifting trolley through a bolt group, and the end of the wire rope is fixed to the drum assembly 4 through the wire rope pressure plate of the rope pressing device 8. After the wire rope passes around the fixed pulley group of the lifting trolley and the movable pulley group of the hook, the power is turned on. After the motor 7 decelerates and increases the torque through the planetary reducer 3, it drives the drum assembly 4 to retract and release the wire rope, thereby driving the hook group to perform lifting operations.

[0030] Furthermore, a reel assembly 4 is provided on both sides of the planetary reducer body 3, and a coupling 5 is provided on one side of the planetary reducer body 3. The coupling 5 preferably adopts a plum blossom coupling, an elastic pin coupling, or a drum gear coupling and other couplings with a larger adjustable deflection angle, which are used to adjust the processing accuracy and assembly error of the entire lifting mechanism to cause the motor 7 and the planetary reducer 3 to be non-concentric, and is not limited to using a rigid coupling.

[0031] Furthermore, one side of the motor 7 is connected to one side of the planetary reducer body 3 through a coupling 5, and the other side of the motor 7 is connected to one side of the right base 10 through bolts. A support ring 6 is arranged between the coupling 5 and the motor 7, a bearing 9 is arranged on one side of the right base 10, and a height limiter 11 is connected to one side of the right base 10 through bolts.

[0032] Furthermore, a guide rod assembly 12 is provided on the other side of the drum 15, and a rope guide 13 is connected to one side of the guide rod assembly 12 by bolts, a rope pressing device 8 is provided on one side of the drum 15, a positioning rod assembly 14 is provided on one side of the drum 15, a rope pressing device 8 is provided on one side of the drum 15, and a positioning rod assembly 14 is provided on one side of the drum 15. The left base 1 and the right base 10 are installed on the lifting trolley through a bolt group, and the wire rope end is fixed to the drum assembly 4 through the wire rope pressure plate of the rope pressing device 8.

[0033] Working principle: When in use, the left base 1 and the right base 10 are installed on the lifting trolley through the bolt group, and the wire rope end is fixed on the drum assembly 4 through the wire rope pressure plate of the rope pressing device 8. After the wire rope passes around the fixed pulley group of the lifting trolley and the movable pulley group of the hook, the power is turned on. After the motor 7 is decelerated and torque increased through the star gear reducer 3, it drives the drum assembly 4 to retract and release the wire rope, driving the hook group to perform lifting operations. Both ends of the star gear reducer body 3 can be used as input ends, and the output end of the star gear reducer body 3 is at the edge. After the motor 7 is built in, it is not as easy to maintain as the traditional It is convenient to expose the motor externally, so the motor 7 used is a permanent magnet synchronous motor, which greatly reduces the maintenance of the motor. The motor 7 is more efficient than the asynchronous motor, has the characteristics of matching the load, and can greatly save energy. At the moment of braking, the internal magnetic field of the motor 7 can maintain the torque corresponding to the load. At this time, the motor magnetic field is equivalent to a holding effect. Braking at this time is equivalent to reducing the friction between the brake wheel and the brake 2, delaying the service life of the brake 2, and using the same motor characteristics. It can also achieve secondary starting with load in the air without slipping, and the noise of the motor 7 is small, and the star wheel deceleration As a special type of planetary reducer, the reducer 3 has high transmission efficiency, high load-bearing capacity, compact structure, stable transmission, low noise, large speed ratio range and wide transmission ratio. The transmission ratio of the first-stage reduction is 18-80 (corresponding to the 2-3-stage required by the traditional parallel shaft reducer), which fully meets the needs of the crane hoisting speed. The two-stage series transmission ratio is 100-5000. The present invention preferably adopts the first-stage speed ratio because it can reduce the size and weight of the reducer while meeting the speed ratio requirements of the crane. The planetary reducer 3 is used as a coaxial input with the motor 7 and an external gear ring circumferential output transmission mode. , can be built into the drum 15 together with the motor 7, so that the motor 7, the planetary reducer 3 and the drum 15 are integrated in appearance, which greatly reduces the volume and weight of the lifting mechanism. The motor 7 and the planetary reducer 3 are built into the drum 15, and the motor 7 and the planetary reducer 3 are connected through a coupling 5. The coupling 5 preferably adopts a plum blossom coupling, or an elastic pin coupling, or a drum gear coupling and other couplings with a larger adjustable deflection angle, which are used to adjust the processing accuracy and assembly error of the entire lifting mechanism, resulting in the non-concentricity of the motor 7 and the planetary reducer 3, and is not limited to using a rigid coupling.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A built-in symmetrical double-output shaft planetary reducer, comprising a planetary reducer body (3), wherein a shaft sleeve (18) is provided on one side of the planetary reducer body (3), a flat key (33) is provided on one side of the shaft sleeve (18), a flange (19) is provided on one side of the planetary reducer body (3), a front end cover (20) is provided on one side of the flange (19), a front support plate (21) is provided on one side of the front end cover (20), an oil seal (32) is provided inside the planetary reducer body (3), an oil seal sleeve (30) is provided on one side of the oil seal (32), the flat key (33) is connected to an input shaft (31) through the oil seal sleeve (30), and the A distance ring (22) is arranged outside the input shaft (31), an eccentric sleeve (23) is arranged on one side of the distance ring (22), and a cylindrical roller bearing is arranged on one side of the distance ring (22); a front support plate (21) is arranged on one side of the flange (19), a planetary gear (24) is arranged on one side of the front support plate (21), the front end cover (20) is connected to an internal gear (25) via a hexagon socket screw, a bushing (17) is arranged inside the planetary reducer body (3), a rear support plate (26) is arranged on one side of the front support plate (21), and a connecting hole is opened inside the rear support plate (26), and three planetary shafts (16) are supported in the connecting hole; The planetary gear (24) is meshed with the internal gear (25), and both sides of the planetary reducer body (3) can serve as input ends; The rear support plate (26) is connected to a motor seat (28) via an internal thread cylindrical pin, a rear end cover (27) is provided on one side of the motor seat (28), a positioning ring (29) is provided inside the planetary reducer body (3), and a hole elastic retaining ring is provided on one side of the cylindrical roller bearing; The built-in symmetrical double-output shaft planetary gear reducer also includes a left base (1), a right base (10) and a drum (15); the planetary gear reducer body (3) is connected to one side of the inside of the drum (15) through a flange (19); one side of the left base (1) is welded to one side of the drum (15); the other side of the drum (15) is welded to one side of the right base (10); the top of the left base (1) is connected to a brake (2) through bolts; and the other side of the inside of the drum (15) is connected to a motor (7) through bolts.

2. The built-in symmetrical double-shaft planetary gear reducer according to claim 1, characterized in that: Both sides of the planetary reducer body (3) are provided with a reel assembly (4), and one side of the planetary reducer body (3) is provided with a coupling (5).

3. The built-in symmetrical double-shaft planetary gear reducer according to claim 2, characterized in that: One side of the motor (7) is connected to one side of the planetary reducer body (3) via a coupling (5), and the other side of the motor (7) is connected to one side of the right base (10) via bolts. A support ring (6) is provided between the coupling (5) and the motor (7), a bearing (9) is provided on one side of the right base (10), and a height limiter (11) is connected to one side of the right base (10) via bolts.

4. The built-in symmetrical double-shaft planetary gear reducer according to claim 1, characterized in that: A guide rod assembly (12) is arranged on the other side of the drum (15), one side of the guide rod assembly (12) is connected to a rope guide (13) via bolts, a rope pressing device (8) is arranged on one side of the drum (15), and a positioning rod assembly (14) is arranged on one side of the drum (15).

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