CN216490169U

CN216490169U - Outer rotor direct-drive synchronous motor and loom

Info

Publication number: CN216490169U
Application number: CN202122823875.XU
Authority: CN
Inventors: 胡秀文; 王祖安
Original assignee: Suzhou Weichuang Electrical Technology Co ltd
Current assignee: Suzhou Weichuang Electrical Technology Co ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-05-10
Anticipated expiration: 2031-11-17

Abstract

The utility model relates to the technical field of electric motor, specifically provide an outer rotor directly drives synchronous machine and loom, this outer rotor directly drives synchronous machine and includes stator module, rotor subassembly and stator rotor bearing, stator module includes a flange stator section of thick bamboo and fixed cover locates iron core winding ring on the flange stator section of thick bamboo periphery wall, the rotor subassembly includes a rotor section of thick bamboo and is fixed in be a plurality of magnetic paths that the annular array arranged on the rotor section of thick bamboo internal perisporium, a flange stator section of thick bamboo passes through stator rotor bearing with the axle center rotate connect in the rotor section of thick bamboo. The outer rotor direct-drive synchronous motor increases the diameter of the rotor assembly, increases inertia, increases heat dissipation area and is lower in motor temperature rise. The flange stator barrel and the rotor barrel are connected into a whole through the stator bearing and the rotor bearing, the coaxial concentricity between the stator assembly and the rotor assembly can be ensured, the magnetic field air gap is uniform, the running speed is more stable, and the installation and the disassembly are convenient.

Description

Outer rotor direct-drive synchronous motor and loom

Technical Field

The application relates to the technical field of motors, in particular to an outer rotor direct-drive synchronous motor and a loom provided with the same.

Background

With the development of economy, the requirements of people on the requirements and the quality of textiles are continuously improved, and various new textile materials such as various synthetic chemical fibers, twisted fibers and the like are continuously improved, updated and applied. Meanwhile, with the continuous development of the traditional industry of the weaving machine, the textile machinery is also accelerated to progress and update, and the cloth width, the pattern and style, the running speed of the weaving machine, the energy efficiency and the like are continuously improved from an early shuttle weaving machine to a later rapier weaving machine, a water jet weaving machine and an air jet weaving machine.

In the early traditional loom, the spindle drive all adopts asynchronous motors, the weaving machine matched parts of the asynchronous motors are more, the installation is complex, the maintenance cost is high, meanwhile, the power is transmitted to the main shaft of the weaving machine, the belt pulley is adopted, the noise and the energy consumption are higher during the operation, and the production efficiency is low.

In recent two years, the weaving machine with the synchronous motor is successively released on the market, the inner rotor synchronous motor adopted by the weaving machine is compared with the weaving machine with the traditional asynchronous motor, the inner rotor synchronous direct drive motor is provided, the motor rotor is directly arranged on the main shaft of the weaving machine, the stator and the motor shell are integrated together and arranged on the wall plate of the weaving machine through the flange plate, a plurality of weaving machine structure accessories can be saved, the transmission efficiency and the energy consumption are greatly improved compared with the asynchronous motor, but the inner rotor direct drive motor has no coaxial positioning device between the stator and the rotor, in the actual installation process, the magnetic steel of the stator core and the rotor is easy to be eccentric due to the magnetic force adsorption, only a tool clamp can be passed through, or the weaving machine customizes the accessories such as a single main shaft bearing cover and the like, the accessories are positioned on the wall plate of the weaving machine through the flange plate after the finish machining, then the stator is fixed, the installation and maintenance efficiency is low, and the coaxiality of the motor stator and the rotor in the operation process can not be ensured in the installation process, the air gap of the motor magnetic field is uneven, the rotating speed is unstable, and friction exists between the motor rotor and the stator, so that the motor is overheated or the sweeping chamber is damaged; in addition, the loom with the structure has the advantages that due to the space limitation of the loom, the rotor is arranged in the middle of the motor, the diameter size is smaller, the heat dissipation space is smaller, and the temperature rise of the motor is higher; meanwhile, the diameter of the spindle motor rotor of the loom with the structure is small, the inertia is small, when the loom weaves wide cloth or runs at a high speed, the loom is easy to vibrate or have unstable rotating speed, the cloth production quality is affected, and when the loom runs at a high speed and runs at a wide width at present, an inertia disc is additionally arranged on the flange of the rotor of the existing inner rotor motor, so that the installation is complex and the cost is high.

SUMMERY OF THE UTILITY MODEL

The application provides an outer rotor direct-drive synchronous motor and a weaving machine, and the outer rotor direct-drive synchronous motor and the weaving machine have the advantages of being large in inertia, lower in motor temperature rise, more stable in running speed and convenient to install and disassemble.

In a first aspect, the application provides an outer rotor direct-drive synchronous motor, including stator module, rotor subassembly and stator-rotor bearing, stator module includes a flange stator section of thick bamboo and fixed cover is located iron core winding ring on the flange stator section of thick bamboo periphery wall, the rotor subassembly includes a rotor section of thick bamboo and is fixed in be a plurality of magnetic paths that the annular array arranged on the rotor section of thick bamboo internal perisporium, a flange stator section of thick bamboo passes through stator-rotor bearing with the axle center rotate connect in the rotor section of thick bamboo.

Further, in one embodiment of the utility model, one end of the flanged stator cylinder extends out of the rotor cylinder.

Further, in one embodiment of the present invention, the magnetic block and the iron core winding ring correspond in position, and a magnetic field air gap is provided between the magnetic block and the iron core winding ring.

Further, in an embodiment of the present invention, the flange stator cylinder includes a stepped cylinder portion, the stator and rotor bearings are mounted in the stepped hole of the stepped cylinder portion, one end surface of the stator and rotor bearings abuts against an inner stepped surface at an end portion of the stepped cylinder portion, and the other end surface of the stator and rotor bearings is limited by a limiting component on the rotor cylinder.

Further, in an embodiment of the present invention, the core winding is sleeved on the outer peripheral wall of the stepped cylinder portion, and is fixed by being limited by the outer stepped end surface of the stepped cylinder portion.

Further, in an embodiment of the present invention, one end of the stepped cylinder portion extending out of the rotor cylinder has a fixed disk, and the fixed disk is fixed with fixing columns distributed uniformly in an annular manner.

Further, in an embodiment of the present invention, the core winding ring includes a stator core and a stator winding, and the stator winding is fixedly sleeved on the outer periphery of the stator core.

Further, in an embodiment of the present invention, the rotor cylinder includes a cylinder body and a hollow shaft, the magnetic blocks are fixed on an inner peripheral wall of the cylinder body, the hollow shaft is fixedly connected to an end wall of the cylinder body and located in the cylinder body to axially extend, the stator and rotor bearings are fixedly sleeved on the hollow shaft, one end of the flange stator cylinder is fixedly sleeved on an outer ring of the stator and rotor bearings, and the other end of the flange stator cylinder extends outward from the cylinder body.

In a second aspect, the application provides a loom, including frame, main shaft and the outer rotor directly drive synchronous machine, the main shaft rotationally install in on the frame and outwards stretch out, the flange stator section of thick bamboo stretches out the end and is fixed in on the frame, the end that stretches out of main shaft with rotor section of thick bamboo is axle center fixed connection.

Further, in an embodiment of the present invention, a driving wheel is coaxially fixed to an outer end surface of the rotor cylinder for driving the loom to operate.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:

the outer rotor directly drives synchronous machine that this application embodiment provided, iron core winding ring fixed sleeve establish on the periphery wall of flange stator section of thick bamboo, and the stator module periphery is located to the rotor subassembly cover, and a plurality of magnetic paths are fixed on rotor section of thick bamboo internal perisporium, form the rotor subassembly of integral type, like this, have increased the diameter of rotor subassembly, have increased inertia, have increased heat radiating area, and the motor temperature rise is lower. In addition, the flange stator barrel is connected with the rotor barrel through the stator and rotor bearings, coaxial concentricity between the stator assembly and the rotor assembly can be guaranteed, and the running speed is more stable. In addition, the stator assembly and the rotor assembly form a whole through the stator and rotor bearings, tools or special structural accessories are not needed to be added during installation, the positioning is directly carried out through the loom main shaft and the loom wallboard installation hole during installation, and the whole installation and the disassembly are convenient. The loom using the outer rotor to directly drive the synchronous motor also has the advantages.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic cross-sectional structural diagram of an outer rotor direct-drive synchronous motor provided in an embodiment of the present application;

fig. 2 is an exploded view of an outer rotor direct-drive synchronous motor provided in an embodiment of the present application;

fig. 3 is a use state diagram of the outer rotor direct-drive synchronous motor applied to a loom according to the embodiment of the application.

The reference numbers illustrate: the stator assembly 1, the rotor assembly 2, the stator-rotor bearing 3, the flange stator barrel 11, the iron core winding ring 12, the rotor barrel 21, the magnetic blocks 22, the magnetic field air gap 20, the stepped barrel 111, the fixed disk 112, the limiting assembly 23, the limiting ring 231, the limiting bolt 232, the fixed column 113, the first bolt 114, the stator iron core 121, the stator winding 122, the through hole 120, the threaded hole 110, the second bolt 123, the barrel 211, the hollow shaft 212, the stepped limiting part 213, the protective cover 125, the frame 4, the main shaft 5, the tapered shaft section 51, the threaded section 52, the lock nut 6, the main shaft bearing 7, the bearing cover 8, the oil seal 9 and the driving wheel 24.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The utility model is described in further detail below with reference to the following figures and detailed description:

referring to fig. 1 and fig. 2, an embodiment of the present application provides an outer rotor direct-drive synchronous motor, which includes a stator assembly 1, a rotor assembly 2, and a stator-rotor bearing 3. The stator assembly 1 comprises a flange stator barrel 11 and an iron core winding ring 12 fixedly sleeved on the outer peripheral wall of the flange stator barrel 11. The rotor assembly 2 includes a rotor cylinder 21 and a plurality of magnetic blocks 22 fixed on the inner peripheral wall of the rotor cylinder 21 and arranged in a circular array. One end of the flange stator tube 11 is inserted into the rotor tube 21 and is coaxially and rotatably connected with the rotor tube 21 through the stator-rotor bearing 3, and the other end of the flange stator tube 11 extends out of the rotor tube 21 so as to be fixed to a designated user device (such as a loom). Magnetic blocks 22 are positioned relative to core winding ring 12 with magnetic field air gaps 20 between magnetic blocks 22 and core winding ring 12. When the iron core winding ring 12 is electrified, a rotating magnetic field is generated, and the rotating magnetic field and the magnetic blocks 22 on the rotor cylinder 21 generate electromagnetic force to drive the rotor assembly 2 to rotate around the stator-rotor bearing 3.

The outer rotor direct-drive synchronous motor provided by the embodiment of the application has the advantages that the iron core winding ring 12 is fixedly sleeved on the outer peripheral wall of the flange stator barrel 11, the rotor assembly 2 is sleeved on the periphery of the stator assembly 1, the plurality of magnetic blocks 22 are fixed on the inner peripheral wall of the rotor barrel 21, the rotor assembly 2 of an integrated type is formed, and the diameter of the rotor assembly 2 is increased. One end of the flange stator barrel 11 extends out of the rotor barrel 21, and the outer diameter of the extending end of the flange stator barrel 11 is provided with a further increased space, so that the diameter of the stator assembly 1 is increased, inertia is increased, the heat dissipation area is increased, and the temperature rise of the motor is lower. In addition, the flange stator barrel 11 is connected with the rotor barrel 21 through the stator and rotor bearing 3, coaxial concentricity between the stator assembly 1 and the rotor assembly 2 can be guaranteed, a magnetic field air gap 20 between the magnetic block 22 and the iron core winding ring 12 is uniform, and the running speed is more stable. In addition, stator module 1 and rotor subassembly 2 have formed a whole through stator and rotor bearing 3, need not increase frock or special structure annex when the installation, directly fix a position through loom main shaft and loom wallboard mounting hole during the installation, and the whole installation and dismantlement are convenient.

In one embodiment of the present application, the flange stator cartridge 11 includes a stepped cartridge portion 111 and a fixed disk 112 fixedly connected to one end of the stepped cartridge portion 111. The stator-rotor bearing 3 is mounted on one end of the stepped bore of the stepped cylinder 111, which is far away from the fixed disk 112, and the outer peripheral surface of the stator-rotor bearing 3 is coaxially limited by the inner peripheral surface of the stepped bore of the stepped cylinder 111. One end face of the stator-rotor bearing 3 abuts against the inner stepped face at the end part of the stepped cylinder part 111 to realize axial limiting, and the other end face of the stator-rotor bearing 3 is limited by the limiting component 23 on the rotor cylinder 21. The limiting component 23 includes a limiting ring 231 and a limiting bolt 232, the limiting ring 231 is fixed in the rotor barrel 21 through the limiting bolt 232, and the limiting ring 231 abuts against the corresponding end surface of the stator-rotor bearing 3. Like this, simple structure, simple to operate can guarantee the spacing stability of stator-rotor bearing 3.

The core winding ring 12 is fitted around the outer peripheral wall of the stepped tube 111, and is fixed to the outer stepped end surface of the stepped tube 111. The fixed disk 112 is located outside the rotor drum 21, so that the outer diameter of the fixed disk 112 can be increased, and the inertia and heat dissipation space are increased. Four fixing columns 113 are fixed on the fixed disc 112, and are distributed annularly and uniformly, and the fixing columns 113 are provided with fixing holes so as to be fixed on a using device through first bolts 114 (shown in fig. 3). The outer rotor direct-drive synchronous motor is fixed on the using equipment through the four fixing columns 113, so that a bearing mounting assembly and other parts on the using equipment can be avoided, the outer rotor direct-drive synchronous motor can be conveniently rotated and adjusted to a proper mounting position, the whole outer rotor direct-drive synchronous motor can be overhead, the heat dissipation space is further increased, the motor can be fully cooled, and the damage caused by the long-time operation overheat of the motor is avoided.

In an embodiment of the present application, the core winding ring 12 includes a stator core 121 and a stator winding 122, and the stator winding 122 is fixedly sleeved on the outer periphery of the stator core 121. The stator core 121 is provided with a plurality of through holes 120, the outer stepped end surface of the stepped cylinder 111 is provided with screw holes 110 corresponding to the through holes 120, and second bolts 123 penetrate through the through holes 120 and are screwed into the screw holes 110, so that the stator core 121 and the stator winding 122 are fixed to the outer periphery of the stepped cylinder 111. When the stator winding 122 is energized, a rotating magnetic field is generated, and the rotating magnetic field and the magnetic blocks 22 on the rotor cylinder 21 generate electromagnetic force to drive the rotor assembly 2 to rotate around the stator-rotor bearing 3.

In one embodiment of the present application, the rotor drum 21 includes a drum body 211 and a hollow shaft 212, the magnetic blocks 22 are fixed on the inner peripheral wall of the drum body 211, and the hollow shaft 212 is fixedly connected to the end wall of the drum body 211 and axially extends inside the drum body 211. The stator-rotor bearing 3 is fixedly sleeved on the hollow shaft 212, that is, the hollow shaft 212 is fixedly inserted into the inner ring of the stator-rotor bearing 3. One end of the flange stator cylinder 11 is fixedly sleeved on the outer ring of the stator-rotor bearing 3, and the other end of the flange stator cylinder 11 extends outwards from the cylinder body 211 to form a fixed disk 112, so that the flange stator cylinder 11 and the rotor cylinder 21 are coaxially and rotatably connected. The end surface of the hollow shaft 212 located in the cylinder 211 is provided with a limit screw hole corresponding to the limit bolt 232, the limit ring 231 is fixed on the hollow shaft 212 through the limit bolt 232, the limit ring 231 is supported on the stator-rotor bearing 3, and the rotor bearing 3 is fixed between the stepped cylinder part 111 and the hollow shaft 212. When the rotor bearing 3 is mounted, the rotor bearing 3 is pushed into the stepped hole of the stepped tube portion 111, one end face of the stator-rotor bearing 3 is axially limited by the inner stepped face of the end portion of the stepped tube portion 111, the outer peripheral face of the stator-rotor bearing 3 is coaxially limited by the inner peripheral face of the stepped hole of the stepped tube portion 111, the hollow shaft 212 of the rotor tube 21 is passed through the inner ring of the stator-rotor bearing 3, the limit ring 231 is fixed to the hollow shaft 212 by the limit bolt 232, and the rotor bearing 3 is fixed between the stepped tube portion 111 and the hollow shaft 212. Therefore, the structure is simple, the installation is convenient, and the coaxial rotating connection of the flange stator barrel 11 and the rotor barrel 21 is easy to realize.

In an embodiment of the present application, the cylinder 211 has a step limiting portion 213 therein, one end of the magnetic block 22 abuts against the step limiting portion 213 to achieve alignment, and the magnetic block 22 can be fixed on the inner wall of the cylinder 211 by an adhesive method. Therefore, the magnetic blocks 22 can be conveniently installed, and the installation position of the magnetic blocks 22 can be ensured to be accurate.

In one embodiment of the present application, a protecting cover 125 is fixed to the open end of the rotor barrel 21, and the protecting cover 125 has a central hole for the flange stator barrel 11 to pass through, and the flange stator barrel 11 is in clearance fit with the central hole. The protective cover 125 may be fixed to the open end surface of the rotor cylinder 21 or to the outer peripheral wall of the flanged stator cylinder 11. Through set up protective cover 125 at the open end of rotor section of thick bamboo 21, can prevent that the foreign matter gets into in the rotor section of thick bamboo 21, play the guard action, simultaneously, protective cover 125 can increase rotor assembly 2's inertia, also can adjust protective cover 125's thickness and increase rotor assembly 2's inertia once more.

Referring to fig. 3, an embodiment of the present application further provides a loom, which includes a frame 4, a main shaft 5 and the above-mentioned outer rotor direct-drive synchronous motor, wherein the protruding end of the flange stator cylinder 11 is fixed on the frame 4, specifically, the protruding end passes through a fixing column 113 on a fixing disc 112 through a first bolt 114 and is screwed on the frame 4. The main shaft 5 is rotatably mounted on the frame 4 and extends outwards to be coaxially and fixedly connected with the rotor cylinder 21, and the main shaft 5 is driven to rotate by the rotor cylinder 21. Specifically, the tapered shaft section 51 of the main shaft 5 is tightly fitted into the tapered hole of the hollow shaft 212 and extends outward to form a threaded section 52, and the threaded section 52 is screwed by the lock nut 6, so that one end of the main shaft 5 is fixed to the hollow shaft 212 of the rotor barrel 21.

In one embodiment of the application, the weaving machine further comprises a main shaft bearing 7, a bearing cap 8 and an oil seal 9. The spindle bearing 7 is sleeved on the stepped part of the spindle 5, the bearing cover 8 is sleeved on the outer peripheral wall of the spindle bearing 7 and fixed on the rack 4, and one end of the bearing cover 8 extends into the flange stator barrel 11, so that the structure is more compact. The conical shaft section 51 and the threaded section 52 of the main shaft 5 pass through the bearing cap 8 and are coaxially and fixedly connected with the hollow shaft 212. The oil seal 9 is arranged at one end, penetrating out of the main shaft 5, of the bearing cover 8, and the oil seal 9 is sleeved between the main shaft 5 and the bearing cover 8 so as to prevent foreign matters such as dust from being gathered at the rotating part of the main shaft 5 and reduce the abrasion to the main shaft 5.

In one embodiment of the present application, a driving wheel 24 is coaxially fixed to the outer end surface of the rotor drum 21, and the loom is driven to operate by the driving wheel 24. Alternatively, the drive pulley 24 is fixed to the end surface of the rotor drum 21 by bolts. Optionally, the outer terminal surface of rotor drum 21 has the location boss, and action wheel 24 is equipped with the constant head tank with location boss looks adaptation, realizes action wheel 24 and rotor drum 21's accurate positioning through location boss and constant head tank cooperation, and it is more convenient to install.

The outer rotor direct-drive synchronous motor loom provided by the embodiment of the application has the advantages that the stator assembly 1 and the rotor assembly 2 form a whole through the stator and rotor bearing 3, a tool or a special structure accessory is not required to be added during installation, the installation is directly positioned through the loom spindle and the loom wallboard mounting hole, and the whole installation and the disassembly are convenient. The fixed cover of iron core winding ring 12 is established on the periphery wall of flange stator section of thick bamboo 11, and stator module 1 periphery is located to rotor subassembly 2 cover, and a plurality of magnetic path 22 are fixed on rotor section of thick bamboo 21 internal perisporium, form the rotor subassembly 2 of integral type, have increased rotor subassembly 2's diameter, have increased inertia, have increased heat radiating area. One end of the flange stator barrel 11 extends out of the rotor barrel 21, and the outer diameter of the extending end of the flange stator barrel 11 is provided with a further increased space, so that the diameter of the stator assembly 1 is increased, inertia is increased, the heat dissipation area is increased, and the temperature rise of the motor is lower. In addition, the flange stator barrel 11 is connected with the rotor barrel 21 through the stator and rotor bearing 3, coaxial concentricity between the stator assembly 1 and the rotor assembly 2 can be guaranteed, a magnetic field air gap 20 between the magnetic block 22 and the iron core winding ring 12 is uniform, and the running speed is more stable.

The embodiments in the present description are all described in a progressive manner, and some of the embodiments are mainly described as different from other embodiments, and the same and similar parts among the embodiments can be referred to each other.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying importance; the words "bottom" and "top", "inner" and "outer" refer to directions toward and away from, respectively, a particular component geometry.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the communication may be direct, indirect via an intermediate medium, or internal to both elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an outer rotor directly drives synchronous machine, includes stator module (1) and rotor subassembly (2), its characterized in that still includes stator bearing (3), stator module (1) is located including flange stator section of thick bamboo (11) and fixed cover iron core winding ring (12) on flange stator section of thick bamboo (11) periphery wall, rotor subassembly (2) include rotor section of thick bamboo (21) and are fixed in be a plurality of magnetic paths (22) that the annular array arranged on rotor section of thick bamboo (21) internal perisporium, flange stator section of thick bamboo (11) pass through stator bearing (3) with the axle center rotate connect in rotor section of thick bamboo (21).

2. The external rotor direct drive synchronous machine as claimed in claim 1, characterized in that one end of said flanged stator drum (11) protrudes outside said rotor drum (21).

3. The external rotor direct drive synchronous machine of claim 1, wherein the magnetic blocks (22) are positioned in correspondence with the core winding ring (12), and a magnetic field air gap (20) is provided between the magnetic blocks (22) and the core winding ring (12).

4. The external rotor direct-drive synchronous motor as recited in claim 1, wherein the flange stator cylinder (11) comprises a stepped cylinder portion (111), the stator and rotor bearings (3) are mounted in a stepped hole of the stepped cylinder portion (111), one end faces of the stator and rotor bearings (3) are abutted against an inner stepped face at the end portion of the stepped cylinder portion (111), and the other end faces of the stator and rotor bearings (3) are limited by a limiting component (23) on the rotor cylinder (21).

5. The outer rotor direct-drive synchronous motor as recited in claim 4, wherein the iron core winding ring (12) is sleeved on the outer peripheral wall of the stepped cylinder portion (111) and is limited and fixed through the outer stepped end face of the stepped cylinder portion (111).

6. The outer rotor direct-drive synchronous motor as claimed in claim 4, wherein a fixed disc (112) is arranged at one end of the stepped cylinder portion (111) extending out of the rotor cylinder (21), and fixing columns (113) which are uniformly distributed in an annular mode are fixed on the fixed disc (112).

7. The external rotor direct-drive synchronous motor as recited in claim 1, wherein the core winding ring (12) comprises a stator core (121) and a stator winding (122), and the stator winding (122) is fixedly sleeved on the periphery of the stator core (121).

8. The external rotor direct-drive synchronous motor as recited in claim 1, wherein the rotor cylinder (21) comprises a cylinder body (211) and a hollow shaft (212), the magnetic blocks (22) are fixed on the inner peripheral wall of the cylinder body (211), the hollow shaft (212) is fixedly connected to the end wall of the cylinder body (211) and located in the cylinder body (211) to axially extend, the stator-rotor bearing (3) is fixedly sleeved on the hollow shaft (212), one end of the flange stator cylinder (11) is fixedly sleeved on the outer ring of the stator-rotor bearing (3), and the other end of the flange stator cylinder extends out of the cylinder body (211).

9. A loom comprises a rack (4) and a main shaft (5), wherein the main shaft (5) is rotatably arranged on the rack (4) and extends outwards, and the loom is characterized by further comprising the outer rotor direct-drive synchronous motor as claimed in any one of claims 1 to 8, the extending end of a flange stator cylinder (11) is fixed on the rack (4), and the extending end of the main shaft (5) is coaxially and fixedly connected with a rotor cylinder (21).

10. Weaving machine according to claim 9, characterized in that a drive wheel (24) is fixed coaxially to the outer end face of the rotor drum (21) for driving the weaving machine in operation.