CN112194027A

CN112194027A - One-level planetary speed reduction low-speed large-torque inward rotation permanent magnet motor direct drive mechanism

Info

Publication number: CN112194027A
Application number: CN202011078073.4A
Authority: CN
Inventors: 秦军; 喻晓号; 喻林; 肖�琳; 屈吉华
Original assignee: Jiangxi Industrial Innovation Technology Co ltd
Current assignee: Jiangxi Industrial Innovation Technology Co ltd
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-01-08

Abstract

The invention discloses a primary planetary speed reduction low-speed large-torque inward rotation permanent magnet motor direct drive mechanism which comprises a permanent magnet motor body and a winding drum body, wherein a planetary speed reducer is arranged between the permanent magnet motor body and the winding drum body, the permanent magnet motor body comprises a motor shell, a rotor shaft is connected inside the motor shell through a bearing, a permanent magnet is arranged outside the rotor shaft, a stator winding is arranged inside the motor shell, an iron core is arranged inside the stator winding, and the stator winding is positioned outside the permanent magnet. According to the invention, through the arrangement of the permanent magnet motor body and the winding drum, linear direct drive transmission is adopted among the permanent magnet motor body, the planetary reducer and the winding drum, so that the defects that the occupied area of U layout is large and the installation cannot be carried out in some narrow spaces in the prior art are overcome, the transmission chain is shortened, in addition, the permanent magnet motor has high energy efficiency, the motor current can be matched with the actual load in real time, and the current is output when the load is hung, so that the loss of electric energy is reduced.

Description

One-level planetary speed reduction low-speed large-torque inward rotation permanent magnet motor direct drive mechanism

Technical Field

The invention relates to the technical field of cranes, in particular to a primary planetary speed-reducing low-speed large-torque inward-rotation permanent magnet motor direct-drive mechanism.

Background

The hoisting mechanism is one of the main core power mechanisms of the traditional crane, mainly comprises an asynchronous motor, a parallel shaft speed reducer, a coupler, a transmission shaft, a brake, a winding drum and other related accessories, and the transmission arrangement type is U-shaped so as to realize the hoisting function.

The hoisting mechanism in the prior art is in U-shaped arrangement, so that the occupied area is large, the hoisting mechanism cannot be installed in narrow spaces, the transmission chain is long, certain energy loss exists, and the energy efficiency of the motor is reduced by adopting a standard asynchronous motor when the load is light. Therefore, it is necessary to design a direct drive mechanism of a one-stage planetary speed reduction low-speed high-torque inner rotation permanent magnet motor to solve the above problems.

Disclosure of Invention

The invention aims to solve the defects of large occupied area and low motor equivalence in the prior art, and provides a primary planetary reduction low-speed high-torque inward rotation permanent magnet motor direct drive mechanism.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a mechanism is directly driven to big moment of torsion adversion permanent-magnet machine of one-level planet speed reduction low-speed, includes the permanent-magnet machine body and the reel body, be provided with planetary reducer between permanent-magnet machine body and the reel body, the permanent-magnet machine body includes the motor casing, the motor casing is inside to be connected with the rotor shaft through the bearing, the rotor shaft outside is provided with the permanent magnet, the inside stator winding that is provided with of motor casing, the inside iron core that is provided with of stator winding, stator winding is located the outside of permanent magnet, the rotor shaft passes through splined connection with planetary reducer's input shaft, there is rotary transformer one side outer wall of motor casing through bolted.

Further, the one end that the permanent-magnet machine body was kept away from to the reel body is connected with the bearing frame through the hub connection, the support has all been welded to one side outer wall of bearing frame and planetary reducer, two there are two optical axis guide rails through bolted connection between the support, and two optical axis guide rail outside sliding connection have the rope guide.

Further, the reel body has a fixed ring in its inner welding, the outer wall of one side of the fixed ring is connected with a reel coupler through a bolt, and one end of the output shaft of the planetary reducer is connected with the reel coupler through a spline.

Furthermore, one end of the connecting shaft of the winding drum body is connected with a flange through a bolt, the outer wall of one side, away from the winding drum body, of the flange is connected with a brake disc through a bolt, a disc brake is arranged on one side of the brake disc, and the disc brake is matched with the brake disc.

Furthermore, the base is integrally formed at the bottom of the planetary speed reducer, and a mounting hole is formed in the outer wall of the top of the base.

Furthermore, one side of brake disc is provided with high stopper, and the input shaft and the brake disc of high stopper pass through the spline connection.

Furthermore, the outer wall of the winding drum body is provided with a rope winding groove, and one end of the rope guide is matched with the rope winding groove.

The invention has the beneficial effects that:

1. through permanent magnet machine body and the reel that sets up, adopt "one" style of calligraphy to directly drive the transmission between permanent magnet machine body, planetary reducer and the reel three, it is big not only to solve the area that prior art "U" overall arrangement took, the drawback that the installation is not down in some narrow spaces, shortens the driving chain moreover, and permanent magnet machine efficiency is high in addition, can realize that motor current matches with actual load in real time, hangs how many loads, how much electric current goes out to reduce the loss of electric energy.

2. Through the planetary reducer who sets up, the permanent-magnet machine body is the big moment of torsion adversion permanent-magnet machine of low-speed, can make planetary reducer's transmission grade reduce, and then can improve planetary reducer's life and improve planetary reducer's the condition of generating heat.

3. Through the brake disc and the disc brake who set up, install the brake disc in the barrel one end of low speed, disc brake can slow-speed braking to it is little to make the wearing and tearing of brake friction disc, and then prolongs disc brake's life.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a primary planetary speed-reducing low-speed large-torque inward-rotation permanent magnet motor direct drive mechanism provided by the invention;

FIG. 2 is a schematic cross-sectional structure view of a primary planetary speed-reducing low-speed large-torque inward-rotation permanent magnet motor direct drive mechanism provided by the invention;

FIG. 3 is a schematic structural diagram of a permanent magnet motor body of a primary planetary speed-reducing low-speed large-torque inward rotation permanent magnet motor direct drive mechanism provided by the invention;

FIG. 4 is an enlarged view of a position A of a primary planetary speed-reducing low-speed large-torque inner-rotation permanent magnet motor direct drive mechanism provided by the invention;

fig. 5 is a schematic structural view of an optical axis guide rail of a primary planetary speed-reducing low-speed large-torque inward-turning permanent magnet motor direct-drive mechanism provided by the invention.

In the figure: the permanent magnet motor comprises a permanent magnet motor body 1, a planetary reducer 2, a winding drum body 3, a rope guider 4, a bearing seat 5, a height limiter 6, a brake disc 7, a disc brake 8, a rotor shaft 9, a permanent magnet 10, an iron core 11, a stator winding 12, a rotary transformer 13, a fixing ring 14, a winding drum coupling 15, a rope winding groove 16, a flange 17, an optical axis guide rail 18, a bracket 19, a motor shell 20, a base 21 and a mounting hole 22.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-5, a one-stage planetary reduction low-speed large-torque inward rotation permanent magnet motor direct drive mechanism comprises a permanent magnet motor body 1 and a drum body 3, wherein the permanent magnet motor body 1 is a low-speed large-torque inner rotor permanent magnet synchronous motor, has no slip ratio, high operation precision and small motor starting current impact, the starting current is equal to the actual rated load current of the motor, a planetary reducer 2 is arranged between the permanent magnet motor body 1 and the drum body 3, the planetary reducer 2 is a one-stage planetary reducer, the transmission grade of the planetary reducer 2 can be reduced by using the low-speed large-torque inner rotor permanent magnet motor, so that the service life of the planetary reducer 2 can be prolonged, the heating condition of the planetary reducer 2 can be improved, the permanent magnet motor body 1 comprises a motor shell 20, a rotor shaft 9 is connected to the inside of the motor shell 20 through a bearing, and the rotor, the permanent magnet 10 is arranged outside the rotor shaft 9, the permanent magnet 10 is fixedly connected with the rotor shaft 9, so that the rotor shaft 9 and the permanent magnet 10 form a rotor of the permanent magnet motor body 1, the stator winding 12 is arranged inside the motor casing 20, the iron core 11 is arranged inside the stator winding 12, the stator winding 12 is positioned outside the permanent magnet 10, the permanent magnet 10 and the rotor shaft 9 can rotate inside the stator winding 12, the rotor shaft 9 is connected with an input shaft of the planetary reducer 2 through a spline, so that the torque is reduced through the planetary reducer 2 when the rotor shaft 9 rotates, the outer wall of one side of the motor casing 20 is connected with a rotary transformer 13 through a bolt, the type of the rotary transformer is BL4805F, the rotary transformer 13 is electrically connected with the stator winding 12 through a conducting wire, a feedback signal is carried out through the rotary transformer 13, and further the rotation angle of the permanent magnet motor body 1 is, the welding deformation of the winch support caused by the welding of a plurality of supports can be avoided.

Further, the one end that permanent-magnet machine body 1 was kept away from to the reel body 3 has bearing frame 5 through the hub connection for bearing frame 5 fixes a position and lubricates the rotation of reel body 3, and bearing frame 5 and planetary reducer 2's one side outer wall all weld has support 19, has two optical axis guide rails 18 through bolted connection between two support 19, and two optical axis guide rail 18 outside sliding connection have rope guide 4, utilize rope guide 4 to conveniently carry out directional winding on reel body 3 to the wire rope of promoting the heavy object.

Further, the inside welding of reel body 3 has solid fixed ring 14, and solid fixed ring 14 one side outer wall has reel shaft coupling 15 through bolted connection, and planetary reducer 2's output shaft one end passes through splined connection with reel shaft coupling 15 for planetary reducer 2's output shaft drives reel body 3 and rotates.

Further, there is flange 17 connecting axle one end of barrel 3 through bolted connection, and there is brake disc 7 one side outer wall that barrel 3 was kept away from to flange 17 through bolted connection, and one side of brake disc 7 is provided with disc brake 8, disc brake 8 and brake disc 7 looks adaptation for when disc brake 8 carries out the band-type brake to brake disc 7, can realize barrel 3's rotatory locking, make the heavy object restart in the air after stopping can not have the gliding phenomenon, and is safer.

Furthermore, a base 21 is integrally formed at the bottom of the planetary reducer 2, a mounting hole 22 is formed in the outer wall of the top of the base 21, and the planetary reducer 2 is conveniently fixed through the mounting hole 22.

Furthermore, one side of brake disc 7 is provided with height limiter 6, and height limiter 6's model is DXZ series, and height limiter 6's input shaft and brake disc 7 pass through splined connection, utilize height limiter 6 to make permanent-magnet machine body stall when rising to the peak to the heavy object of promotion.

Further, the outer wall of the reel body 3 is provided with a rope winding groove 16, the rope winding groove 16 is in a threaded structure, one end of the rope guide 4 is matched with the rope winding groove 16, and when the reel body 3 rotates, the rope guide 4 can be driven to move through the threaded structure of the rope winding groove 16, so that the rope guide 4 can directionally wind the steel wire rope for lifting heavy objects.

The working principle is as follows: during the use, install fixedly through bearing frame 5 and base 22, switch on the power of permanent-magnet machine body 1 through the wire, stator winding 12 of permanent-magnet machine body 1 circular telegram passes through resolver 13's effect, make permanent magnet 10 drive rotor shaft 9 and rotate, rotor shaft 9's rotation drives planetary reducer 2's input shaft and output shaft and rotates, planetary reducer 2's output shaft drives reel shaft coupling 15 and rotates, reel shaft coupling 15 drives reel body 3 through solid fixed ring 14 and rotates, make reel body 3 realize rolling the wire rope of promoting the heavy object, reel body 3 drives rope guide 4 through spiral rope winding groove 16 when rotating and moves, slide on optical axis slide rail 18 when rope guide 4 moves, make rope guide 4 realize the effect of direction to the rolling of wire rope.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A primary planetary speed-reducing low-speed large-torque inward-turning permanent magnet motor direct-drive mechanism comprises a permanent magnet motor body (1) and a winding drum body (3), it is characterized in that a planetary reducer (2) is arranged between the permanent magnet motor body (1) and the winding drum body (3), the permanent magnet motor body (1) comprises a motor shell (20), a rotor shaft (9) is connected inside the motor shell (20) through a bearing, a permanent magnet (10) is arranged outside the rotor shaft (9), a stator winding (12) is arranged inside the motor casing (20), an iron core (11) is arranged in the stator winding (12), the stator winding (12) is positioned outside the permanent magnet (10), the rotor shaft (9) is connected with an input shaft of the planetary reducer (2) through a spline, the outer wall of one side of the motor shell (20) is connected with a rotary transformer (13) through a bolt.

2. The mechanism is characterized in that a bearing seat (5) is connected to one end, far away from a permanent magnet motor body (1), of a winding drum body (3) through a shaft, supports (19) are welded to the outer walls of the bearing seat (5) and one side of a planetary speed reducer (2), two optical axis guide rails (18) are connected between the two supports (19) through bolts, and rope guides (4) are connected to the outer portions of the two optical axis guide rails (18) in a sliding mode.

3. The mechanism is characterized in that a fixed ring (14) is welded inside a drum body (3), the outer wall of one side of the fixed ring (14) is connected with a drum coupling (15) through a bolt, and one end of an output shaft of the planetary reducer (2) is connected with the drum coupling (15) through a spline.

4. The direct-drive mechanism of the one-stage planetary speed-reducing low-speed high-torque internal rotation permanent magnet motor as claimed in claim 1, wherein one end of a connecting shaft of the winding drum body (3) is connected with a flange (17) through a bolt, the outer wall of one side, away from the winding drum body (3), of the flange (17) is connected with a brake disc (7) through a bolt, a disc brake (8) is arranged on one side of the brake disc (7), and the disc brake (8) is matched with the brake disc (7).

5. The direct-drive mechanism of the one-stage planetary speed-reducing low-speed high-torque internal rotation permanent magnet motor as claimed in claim 1, wherein a base (22) is integrally formed at the bottom of the planetary speed reducer (2), and a mounting hole (22) is formed in the outer wall of the top of the base (22).

6. The direct-drive mechanism of the one-stage planetary speed-reducing low-speed high-torque internal rotation permanent magnet motor as claimed in claim 4, wherein a height limiter (6) is arranged on one side of the brake disc (7), and an input shaft of the height limiter (6) is connected with the brake disc (7) through a spline.

7. The direct-drive mechanism of the one-stage planetary speed-reducing low-speed high-torque inner-rotation permanent magnet motor as claimed in claim 2, wherein a rope winding groove (16) is formed in the outer wall of the winding drum body (3), and one end of the rope guider (4) is matched with the rope winding groove (16).