CN115765363A - Assembling tool and assembling method for stator and rotor of hollow shaft permanent magnet motor - Google Patents

Abstract

The invention provides an assembling tool and an assembling method for a hollow shaft permanent magnet motor stator and a rotor, which comprises a base arranged on a workbench, a guide rod vertically fixed on the base, and an upper cover plate and a lower cover plate which are respectively used for being arranged at two ends of the rotor; and guide holes matched with the outer diameters of the guide rods are formed in the centers of the upper cover plate and the lower cover plate, wherein the outer diameter of the lower cover plate is equal to the diameter of a bearing inner ring of the bearing I. The guide cylinders are arranged at the two ends of the rotor, so that the occupied space is very small, the structure is simple, and the positioning is convenient. The guide rod is fixed in the base, and when assembling together, the base has the effect of support, location to the guide rod, and the guide rod can not produce deformation or skew under the effect of magnetic pull. The technical problems that the prior art is not suitable for the combination of the motor stator and the motor rotor with hollow shafts, the operation space is large, potential safety hazards exist, the manufacturing cost is high, and the guide rod is easy to deform and deflect when the motor stator and the motor rotor are combined are solved.

Description

Assembling tool and assembling method for stator and rotor of hollow shaft permanent magnet motor

Technical Field

The invention relates to the technical field of motor production, in particular to an assembling tool and an assembling method for a stator and a rotor of a hollow shaft permanent magnet motor.

Background

The permanent magnet motor has the excellent characteristics of high efficiency, energy conservation, environmental protection and the like, and the permanent magnet motor is gradually substituted for an alternating current asynchronous motor in many occasions. Compared with an asynchronous motor, the permanent magnet motor has higher assembly difficulty due to the structural particularity of the permanent magnet motor, and particularly, in the process of combining the stator and the rotor, the stator and the rotor are easy to attract each other and the raceway surface of a bearing is scratched due to the influence of the eccentric magnetic pulling force of the stator and the rotor, so that the economic loss is caused due to the reworking of products or scrapping of parts.

The motor is divided into a transmission end and a non-transmission end, namely the stator and the rotor correspondingly comprise the transmission end and the non-transmission end. The transmission end and the non-transmission end of the motor are respectively provided with an end cover and a bearing matched with the rotating shaft, the inner side of the end cover close to the motor is provided with a bearing chamber, and the bearing is arranged in the bearing chamber. In the invention, an end cover arranged at a transmission end is called an end cover I, and an end cover arranged at a non-transmission end is called an end cover II; the bearing mounted on the transmission end is called bearing one, and the bearing mounted on the non-transmission end is called bearing two.

For the stator and rotor combination of the permanent magnet motor, the prior art generally adopts a method of vertically combining the stator and the rotor, as shown in fig. 1, the adopted tool comprises a base 14, a guide cylinder 15 and a guide rod 16, the base 14 is arranged on a workbench, the guide cylinder 15 is fixed on the base 14, the guide cylinder 15 is arranged at one end of a stator 12, the guide rod 16 is arranged at one end of a rotor 11, and the stator and the rotor are combined by small clearance fit guide of the guide cylinder 15 and the guide rod 16, and the specific working steps are as follows:

(1) Pressing an outer ring of the first bearing into a bearing chamber of the first end cover, and mounting the first end cover to the transmission end of the stator;

(2) Turning over the stator to a vertical state, wherein one end with the first end cover faces downwards;

(3) Hoisting the stator to an operation table, and fixing the first end cover on a base with a guide cylinder;

(4) Mounting an inner ring of the bearing at a rotor transmission end, and then mounting a guide rod at the rotor transmission end;

(5) Pressing the second bearing to a bearing chamber of the second end cover, and then installing the second end cover with the second bearing to a non-transmission end of the rotor;

(6) Turning the rotor to be in a vertical state, wherein one end with the second end cover faces upwards;

(7) The rotor is lifted to the upper side of the stator, the stator and the rotor are basically coaxial, the rotor is slowly lowered again, the position of the rotor is adjusted, the guide rod enters the guide cylinder, and the rotor continues to be lowered until the end cover II is in contact with the stator.

(8) And after the fastening bolts are arranged on the second end cover, the motor is lifted from the operating platform and turned to be in a horizontal state, and the whole stator and rotor assembling operation is completed.

Although the problem of the stator and the rotor of most permanent magnet motors combined together can be solved in the prior art, the following defects also exist:

(1) The guide rod needs to be installed on the rotating shaft, the diameter of the guide rod is influenced by the diameter of the rotating shaft and the length of the rotor, and the material selection and processing cost is relatively high. For example, when the diameter of the rotor of the permanent magnet motor is large and the rotating shaft is a hollow shaft, if the stator and the rotor are combined together, the designed guide rod has a large diameter, which causes inconvenience in installation.

(2) The pedestal mounting is on the workstation, and the required operation overall height is about 3 times rotor length when deciding the rotor and attach together, receives factory building or overhead traveling crane high restriction when the rotor is longer easily, also has certain potential safety hazard simultaneously.

(3) When the rotor is long, the guide bar is easily deformed or deflected, so that the stator and rotor cores are adsorbed together to cause scratches.

(4) The existing stator and rotor combination device is generally only suitable for a motor of one type, and the manufacturing cost is relatively high.

Disclosure of Invention

The invention provides a stator and rotor assembling tool and an assembling method for a permanent magnet motor of a hollow shaft, aiming at the technical problems that the stator and rotor assembling tool for the permanent magnet motor in the prior art is not suitable for the hollow shaft motor, has large operation space, potential safety hazard and high manufacturing cost during assembling, and a guide rod is easy to deform and deflect.

The above object of the present invention is achieved by the following technical solutions:

a hollow shaft permanent magnet motor stator and rotor assembling tool comprises a base placed on a workbench, a guide rod vertically fixed on the base, and an upper cover plate and a lower cover plate which are respectively used for being installed at two ends of a rotor; the centers of the upper cover plate and the lower cover plate are respectively provided with a guide hole matched with the outer diameter of the guide rod, wherein the outer diameter of the lower cover plate is smaller than or equal to the inner diameter of a bearing outer ring of the bearing I.

Here, it should be noted that: firstly, some bearings are that a roller and a retainer are fixed on an outer ring of the bearing; in the second type, some bearings are formed by fixing a roller and a retainer on an inner ring. When the first bearing is the first bearing, the outer diameter of the lower cover plate is actually not smaller than the inner diameter of the bearing outer ring, but is more precisely smaller than or equal to the inner diameter surrounded by the rollers of the first bearing. When the first bearing is the second bearing, the outer diameter of the lower cover plate is smaller than or equal to the inner diameter of a bearing outer ring of the bearing.

The invention provides a tool for assembling a stator and a rotor of a motor, which is suitable for a permanent magnet motor with a hollow shaft. Compared with the prior art, when the guide rod is fixedly arranged on the base, the guide rod is fixed on the base, the base is used for fixedly positioning the guide rod, and the guide rod cannot displace in the assembling process, so that the guide rod is not easy to deform or deflect, and the stator and the rotor are more smooth in the assembling process; secondly, when the combined type wind power generator is combined, the operation height is at least the height of the guide rod and the rotor, and when the combined type wind power generator is combined in the prior art, the operation height is at least the height of the rotor, the guide rod, the stator and the guide cylinder, so that the height of an operation platform is reduced compared with the prior art, the total operation height is about 2 times of the rotor length, the operation is more convenient, and the safety is improved.

When the stator is used, the first end cover of the stator transmission end is fixed with the base through a fastener, and a bearing outer ring of the first bearing is installed in a bearing chamber of the first end cover; the base is placed on the workbench, the upper cover plate and the lower cover plate are respectively installed at two ends of the rotor, a bearing inner ring of a bearing I is further installed at the non-transmission end of the rotor, the bearing inner ring is located on the lower cover plate, guide holes of the upper cover plate and the lower cover plate are matched with the guide rods, the rotor moves downwards along the guide rods until the two rabbets of the end cover are contacted with the rabbets of the non-transmission end of the stator, and then the two rabbets of the end cover are pressed into the rabbets of the non-transmission end of the stator by using the fasteners. And disassembling the connecting piece between the first end cover and the base, lifting the stator and rotor assembly out of the base, and turning the stator and rotor assembly into a horizontal state to complete the stator and rotor assembly operation.

In conclusion, the tool is suitable for assembling the stator and the rotor of the permanent magnet motor with the hollow shaft, and the technical problems that the operation space is large, potential safety hazards exist, the manufacturing cost is high, and the guide rod is easy to deform and deflect when the permanent magnet motor stator and the rotor are assembled in the prior art are solved.

Further, the base comprises a bottom plate, a support ring and a rib plate fixed between the bottom plate and the support ring; the guide rod is vertically fixed at the center of the bottom plate and penetrates out of the support ring, and the rib plates are uniformly distributed around the guide rod along the circumferential direction; the upper end of the support ring is provided with a first spigot matched with the first end cover, and a fixing hole is formed in the first spigot and used for being connected with the first end cover.

The support ring is used as an interface of the first transmission end cover and is provided with a first spigot (coaxial with the guide rod) and a fixing hole, and the support ring plays a role in supporting and fixing the first transmission end cover (namely the first end cover) and the stator; the rib plate is used for fixing the support ring.

Preferably, the bottom plate comprises an upper bottom plate, a lower bottom plate and a second rib plate fixed between the upper bottom plate and the lower bottom plate, and the upper bottom plate, the lower bottom plate and the second rib plate are used for reinforcing and fixing the guide rod, so that the guide rod is prevented from being deflected or loosened due to magnetic tension. The guide rod passes through the whole base, and the end face of the guide rod is flush with the bottom surface of the base.

Furthermore, the support ring is detachably mounted on the rib plate. The support ring is preferably fastened to the web using bolts, so that the support ring is removable. The stator and rotor assembling tool can be suitable for motors of more types by replacing the support rings, the upper cover plate and the lower cover plate with different sizes and using other parts of the existing tool.

Furthermore, the lower surface of the upper cover plate is provided with a second spigot which is matched with the non-transmission end of the rotor, a second threaded hole is formed in the second spigot, and the upper cover plate is connected with the non-transmission end of the rotor through the second threaded hole by using a second fastening piece.

And the spigot II is arranged to facilitate positioning and installation with the rotor.

Furthermore, the upper cover plate is also provided with a third threaded hole for hoisting, and the third threaded hole is used for installing a hanging ring.

Furthermore, the upper surface of the lower cover plate is provided with a fourth spigot matched with the transmission end of the rotor, the fourth spigot is provided with a fourth threaded hole, and the lower cover plate is connected with the transmission end of the rotor through the fourth threaded hole by using a fourth fastener.

Furthermore, the outer circumference of the lower cover plate is a guide outer circular surface, and when the lower cover plate is assembled, the guide outer circular surface is used for installation guide of the bearing inner ring of the bearing I.

Furthermore, when the roller of the first bearing and the retainer are fixed on the outer ring of the first bearing, the guide outer circular surface is made of a softer material relative to the roller of the first bearing, so that the roller of the bearing is prevented from being damaged in the assembling process.

Furthermore, the outer guiding circle surface is a copper ring and is fixed with the lower cover plate by using a spot welding mode.

The invention also provides a motor stator and rotor combination method, which adopts the motor stator and rotor combination tool to carry out motor stator and rotor combination and comprises the following specific steps:

s1: pressing the outer ring of the first bearing in a bearing chamber of the first end cover, and mounting the first end cover to the stator transmission end to form a stator assembly;

s2: turning over the stator assembly to be in a vertical state, and enabling one end of the stator, which is provided with the first end cover, to face downwards;

s3: hoisting the stator assembly to the base, and fixing the end cover I and the base through a connecting piece to enable the stator assembly and the base to form a whole;

s4: mounting a second bearing in a bearing chamber of a second end cover of the non-transmission end of the rotor, and mounting the second end cover on the non-transmission end of the rotor;

s5: sleeving a bearing inner ring of a first bearing on a rotor transmission end, and sleeving a lower cover plate on the rotor transmission end, wherein the bearing inner ring of the first bearing is positioned on the lower cover plate; mounting the rotor upper cover plate on the rotor non-transmission end, and mounting the hoisting ring on the rotor upper cover plate; forming a rotor assembly through the steps of S4 and S5;

s6: turning over the rotor assembly to a vertical state to enable the transmission end of the rotor to face downwards;

s7: hoisting the rotor assembly above the stator assembly, aligning guide holes of a lower rotor cover plate with guide rods on a base, slowly descending the rotor assembly to enable the guide rods to sequentially penetrate through the lower rotor cover plate and an upper rotor cover plate until the second seam allowance of the end cover is contacted with the seam allowance of the non-transmission end of the stator, and pressing the second seam allowance of the end cover into the seam allowance of the non-transmission end of the stator by using a fastener;

s8: and disassembling a connecting piece between the first end cover and the base, lifting the stator and rotor assembly out of the base, turning the stator and rotor assembly into a horizontal state, and disassembling the upper cover plate and the lower cover plate to complete the stator and rotor assembling operation.

The invention has the following beneficial effects:

the invention designs a stator and rotor assembling tool and an assembling method suitable for a permanent magnet motor with a hollow shaft according to the sizes of the interfaces of a stator, a rotor, end covers at two ends and an end cover bearing. 1. The guide bar is fixed with the base, has solved the guide bar of current frock can't be fixed not enough with the hollow shaft to the guide bar is fixed with the base, and the base is fixed a position the guide bar, attaches together in-process guide bar itself and can not take place the displacement, therefore the guide bar is difficult to produce and warp or incline, and stator-rotor attaches together the in-process more smoothly. 2. When the combined type wind power generator is combined, the operation height is at least the height of the guide rod and the rotor, and when the combined type wind power generator is combined in the prior art, the operation height is at least the height of the rotor, the guide rod, the stator and the guide cylinder, so that the height of an operation platform is reduced compared with the prior art, the total operation height is about 2 times of the rotor length, the operation is more convenient, and the safety is improved. 3. The upper cover plate and the lower cover plate are designed, the guide holes are formed in the upper cover plate and the lower cover plate and are used for guiding the guide rods, and the center holes of the cover plates at the two ends form guide cylinders.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of the stator and rotor of a permanent magnet motor in combination in the prior art.

Fig. 2 is a schematic structural diagram of a stator and rotor assembling tool of the permanent magnet motor in embodiment 1.

FIG. 3 is a schematic view showing the installation of the stator-rotor assembling device in accordance with embodiment 1.

Fig. 4 is a schematic structural view of the base and the guide rod.

Fig. 5 is a schematic view of the structure of the upper cover plate.

Fig. 6 is a schematic view of the structure of the lower cover plate.

The device comprises a rotor 11, a stator 12, a solid shaft 13, an existing tool base 14, an existing tool guide cylinder 15 and an existing tool guide rod 16;

the structure comprises a first bearing outer ring 21, a first end cover 22, a second bearing 23, a second end cover 24, a stator 25, a rotor 26, a hollow shaft 27 and a first bearing inner ring 28;

a guide rod 3;

the base 4, the bottom plate 41, the support ring 42, the rib plate 43, the first spigot 44, the connecting piece 45 and the fixing hole 46;

the upper cover plate 5, an upper cover plate guide hole 51, a spigot II 52, a threaded hole II 53, a fastener II 54, a threaded hole III 55 and a hanging ring 56;

the lower cover plate 6, the lower cover plate guide hole 61, the spigot four 62, the threaded hole four 63, the fastener four 64 and the guide outer circular surface 65.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

Example 1

Analysis in the background art can know, when permanent-magnet machine rotor pivot is the hollow shaft, if adopt prior art's stator and rotor to attach together the method, the guide bar diameter of designing out is great, leads to the installation inconvenient, and the guide bar skew appears easily and leads to the condition that stator and rotor attract mutually, requires operation platform height simultaneously, has the potential safety hazard. Therefore, it is necessary to provide a more suitable method to solve the problem of assembling the stator and the rotor of the hollow shaft permanent magnet motor, which is as follows:

a stator and rotor assembling tool of a permanent magnet motor is shown in figures 2 and 3 and comprises a base 4 placed on a workbench, a guide rod 3 vertically fixed on the base 4, and an upper cover plate 5 and a lower cover plate 6 which are respectively used for being installed at two ends of a rotor 26; the centers of the upper cover plate 5 and the lower cover plate 6 are both provided with guide holes matched with the outer diameter of the guide rods 3, wherein the rollers of the first bearing and the retainer are fixed on an outer ring 21 of the first bearing in the embodiment, so that the outer diameter of the lower cover plate 6 is less than or equal to the inner diameter surrounded by the rollers of the first bearing.

As can be seen from a comparison of fig. 1 and 3, for the solid shaft 13, the guide rod 16 can be connected to the solid shaft 13, for the hollow shaft 27, the hollow shaft 27 has a larger diameter than the solid shaft, and the hollow shaft 27 does not facilitate the installation of the guide rod 3. On the other hand, as shown in fig. 1, when the device is assembled, the working height is at least the height of the rotor 11+ the guide rod 16+ the stator 12+ the guide cylinder 15 in the prior art, as shown in fig. 3, when the device is assembled, the working height is at least the height of the guide rod 3+ the rotor 26 because the guide rod 3 is fixed with the base 4, so that the device greatly reduces the working height. The guide rod 3 is fixed with the base 4, and the other advantage is that the guide rod 3 has no displacement when being assembled and is fixed, so the guide rod is not easy to deform or deflect under the action of the magnetic pulling force of the stator and the rotor. The upper end of the guide rod 3 is provided with a conical chamfer, so that the guide rod is convenient to assemble. For the direction when giving the rotor and combining together, this application sets up upper cover plate 5 and lower apron 6 respectively at rotor 26 both ends ingeniously, and it has the guiding hole to open on upper cover plate 5 and the lower apron 6, combines the hollow actual operating mode of hollow shaft 27, forms the guide cylinder and leads for guide bar 3. The upper cover plate 5 and the lower cover plate 6 are simple in structure, only guide holes matched with the guide rods 3 need to be arranged, and in order to position, the upper cover plate 5 and the lower cover plate 6 are provided with rabbets, and the guide holes and the rabbets are easy to achieve technically.

The specific structures of the base 4, the upper cover plate 5 and the lower cover plate 6 are as follows:

as shown in fig. 4, the base 4 includes a bottom plate 41, a support ring 42, and a rib plate 43 fixed between the bottom plate 41 and the support ring 42; the guide rod 3 is vertically fixed at the center of the bottom plate 41 and penetrates out of the support ring; the rib plates 43 are uniformly distributed around the guide rod 3 along the circumferential direction; the upper end of the supporting ring 42 is provided with a first spigot 44 matched with the first end cover 22, and a fixing hole 46 is formed in the first spigot 44 and used for being connected with the first end cover 22.

The support ring 42 is detachably mounted on the rib plate 43. The support ring 42 is fixed on the rib plate 43 by using bolts, so that the support ring 42 is detachable.

As shown in fig. 5, a second stopping opening 52 adapted to the non-transmission end of the rotor 26 is formed in the lower surface of the upper cover plate 5, a second threaded hole 53 is formed in the second stopping opening 52, and the second fastening member 54 is used to connect the upper cover plate 5 with the non-transmission end of the rotor 26 through the second threaded hole 53.

And a third threaded hole 55 for hoisting is formed in the upper cover plate 5 and is used for installing a hanging ring 56.

As shown in fig. 6, the upper surface of the lower cover plate 6 is provided with a spigot four 62 adapted to the transmission end of the rotor 26, the spigot four 62 is provided with a threaded hole four 63, and the lower cover plate 6 is connected with the transmission end of the rotor 26 through the threaded hole four 63 by using a fastener four 64.

The outer circumference of the lower cover plate 6 is a guide outer circular surface 65, and the guide outer circular surface 65 is an installation guide of a bearing inner ring of the first bearing during assembly.

When the rollers of the first bearing and the retainer are fixed on the first bearing outer ring 21, the outer guide circular surface 65 is made of a softer material relative to the rollers of the first bearing, so that the rollers of the first bearing are prevented from being damaged in the assembling process.

The pilot outer circular surface 65 is a copper ring and is fixed to the lower cover plate 6 by spot welding.

The existing stator and rotor assembling device is generally only suitable for motors of one model, the manufacturing cost is relatively high, the supporting ring 42 of the motor assembly can be disassembled, the upper cover plate 5 and the lower cover plate 6 can also be disassembled, when the motor assembly is used for assembling motors of different models, only the supporting ring 42, the upper cover plate 5 and the lower cover plate 6 need to be replaced, other parts do not need to be replaced, and the manufacturing cost is reduced compared with the prior art.

During manufacturing, the guide rod 3 is welded on the base 4, and the stator 25 and the transmission end cover are fixed on the base 4 to form a rigid whole; the upper cover plate and the lower cover plate form a guide cylinder after being installed, and the stator and the rotor are assembled together by the guide rod 3 and the guide cylinder. Compared with the prior art (the guide rod is arranged on the rotor, and the guide cylinder is arranged on the stator), the stator and rotor combined device has the advantages that the guide rod 3 is welded and fixed, the deflection resistance and the deformation resistance are stronger, the guide cylinder formed by the upper cover plate and the lower cover plate 6 of the rotor 26 is simple in structure and convenient to install, the whole stator and rotor combined device is ingenious in design and simple in structure, the height of an operation platform is reduced, the safety is higher, and meanwhile, the working efficiency is also improved.

Compared with the prior art, the guide cylinder (the guide holes of the upper cover plate and the lower cover plate), the guide rod 3 and the base 4 are also included in the application, but the difference from the prior art is that the guide cylinder is installed at two ends of the rotor 26, the occupied space is very small, the structure is simple, and the positioning is convenient. The guide rod 3 is fixed on the base 4, when the guide rod is assembled, the base 4 has the functions of supporting and positioning the guide rod 3, and the guide rod 3 cannot deform or deflect under the action of magnetic pull force. Consequently the application hollow shaft permanent-magnet machine stator-rotor attach together frock different with prior art's structure to solved prior art and not being applicable to attaching together of the motor stator-rotor that has the hollow shaft, operating space is big when attaching together, have potential safety hazard, cost of manufacture height, the guide bar takes place to warp easily and the technical problem of incline.

Example 2

A method for assembling a stator and a rotor of a hollow shaft permanent magnet motor comprises the following steps of:

s1: pressing a bearing first outer ring 21 in a bearing chamber of an end cover first 22, and mounting the end cover first 22 to a transmission end of a stator 25 to form a stator assembly;

s2: turning over the stator assembly to a vertical state, and enabling one end of the stator 25, which is provided with the first end cover 22, to face downwards;

s3: hoisting the stator assembly to the base 4, matching the first end cover 22 with the first spigot 44, and fixing the first end cover 22 and the base 4 through a connecting piece 45, so that the stator assembly and the base 4 form a whole;

s4: mounting a second bearing 23 in a bearing chamber of a second end cover 24 at the non-transmission end of the rotor 26, and mounting the second end cover 24 on the non-transmission end of the rotor 26;

s5: sleeving the bearing inner ring 28 of the first bearing at the transmission end of the rotor, installing the lower cover plate 6 on the transmission end of the rotor 26, enabling the transmission end of the rotor 26 to be matched with the spigot IV 62, and connecting the lower cover plate 6 with the transmission end of the rotor 26 through the threaded hole IV 63 by using a fastener IV 64, wherein the bearing inner ring 28 of the first bearing is positioned on the lower cover plate 6 as shown in FIG. 3; mounting the upper cover plate 5 on the non-transmission end of the rotor 26, enabling the non-transmission end of the rotor 26 to be matched with the second rabbet 52, connecting the upper cover plate 5 with the non-transmission end of the rotor 26 through a second threaded hole 53 by using a second fastening piece 54, and mounting a hanging ring 56 on the upper cover plate 5; forming a rotor assembly through the steps of S4 and S5;

s6: turning the rotor assembly to a vertical state with the drive end of the rotor 26 facing downward;

s7: hoisting the rotor assembly above the stator assembly, aligning the guide holes 61 of the lower cover plate with the guide rods 3 on the base, slowly descending the rotor assembly to ensure that the guide rods 3 sequentially pass through the lower cover plate 6 and the upper cover plate 5 until the spigot of the second end cover 24 is contacted with the spigot of the non-transmission end of the stator 25, and then pressing the spigot of the second end cover 24 into the spigot of the non-transmission end of the stator 25 by using a fastener;

s8: and (3) disassembling the connecting piece 45 between the first end cover 22 and the base 4, lifting the stator and rotor assembly out of the base 4, turning the stator and rotor assembly into a horizontal state, and disassembling the upper cover plate 5 and the lower cover plate 6 to finish the stator and rotor assembling operation.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A hollow shaft permanent magnet motor stator and rotor assembling tool is characterized by comprising a base placed on a workbench, a guide rod vertically fixed on the base, and an upper cover plate and a lower cover plate which are respectively used for being installed at two ends of a rotor; the centers of the upper cover plate and the lower cover plate are respectively provided with a guide hole matched with the outer diameter of the guide rod, wherein the outer diameter of the lower cover plate is smaller than or equal to the inner diameter of a bearing outer ring of the bearing I.

2. The hollow shaft permanent magnet motor stator and rotor assembling tool according to claim 1, wherein the base comprises a bottom plate, a support ring and a rib plate fixed between the bottom plate and the support ring; the guide rod is vertically fixed in the center of the bottom plate and penetrates out of the support ring; the rib plates are uniformly distributed around the guide rod along the circumferential direction; the upper end of the support ring is provided with a first spigot matched with the first end cover, and a fixing hole is formed in the first spigot and used for being connected with the first end cover.

3. The hollow shaft permanent magnet motor stator and rotor assembling tool according to claim 2, wherein the support ring is detachably mounted on the rib plate.

4. The hollow shaft permanent magnet motor stator and rotor assembling tool according to claim 1, wherein a second spigot matched with the non-transmission end of the rotor is arranged on the lower surface of the upper cover plate, a second threaded hole is formed in the second spigot, and the upper cover plate is connected with the non-transmission end of the rotor through the second threaded hole by using a second fastening piece.

5. The hollow shaft permanent magnet motor stator and rotor assembling tool according to claim 4, wherein a third threaded hole for hoisting is formed in the upper cover plate and used for installing a lifting ring.

6. The hollow shaft permanent magnet motor stator and rotor assembling tool according to claim 1, wherein a fourth spigot adapted to the transmission end of the rotor is arranged on the upper surface of the lower cover plate, the fourth spigot has a fourth threaded hole, and the lower cover plate is connected with the transmission end of the rotor through the fourth threaded hole by using a fourth fastener.

7. The hollow shaft permanent magnet motor stator and rotor assembling tool according to claim 6, wherein the outer circumference of the lower cover plate is a guiding outer circular surface, and during assembling, the guiding outer circular surface is a mounting guide for a bearing inner ring of the first bearing.

8. The assembly fixture for assembling the stator and the rotor of the hollow shaft permanent magnet motor according to claim 7, wherein when the roller of the first bearing and the retainer are fixed to the outer ring of the first bearing, the outer guiding circular surface is made of a material softer than the roller of the first bearing.

9. The hollow shaft permanent magnet motor stator and rotor assembling tool according to claim 8, wherein the outer guiding circle surface is a copper ring and is fixed with the lower cover plate by spot welding.

10. A hollow shaft permanent magnet motor stator and rotor assembling method is characterized in that the hollow shaft permanent magnet motor stator and rotor assembling tool disclosed by any one of claims 1~9 is adopted for motor stator and rotor assembling, and the method comprises the following specific steps:

s1: pressing the outer ring of the first bearing in a bearing chamber of the first end cover, and mounting the first end cover to the stator transmission end to form a stator assembly;

s2: turning over the stator assembly to be in a vertical state, and enabling one end of the stator, which is provided with the first end cover, to face downwards;

s3: hoisting the stator assembly to the base, and fixing the end cover I and the base through a connecting piece to enable the stator assembly and the base to form a whole;

s4: mounting a second bearing in a bearing chamber of a second end cover of the non-transmission end of the rotor, and mounting the second end cover on the non-transmission end of the rotor;

s5: sleeving a bearing inner ring of a first bearing at a rotor transmission end, and sleeving a lower cover plate at the rotor transmission end, wherein the bearing inner ring of the first bearing is positioned on the lower cover plate; mounting the rotor upper cover plate at the non-transmission end of the rotor; forming a rotor assembly through the steps of S4 and S5;

s6: turning over the rotor assembly to a vertical state to enable the transmission end of the rotor to face downwards;

s7: hoisting the rotor assembly above the stator assembly, aligning guide holes of a lower rotor cover plate with guide rods on a base, slowly descending the rotor assembly to enable the guide rods to sequentially penetrate through the lower rotor cover plate and an upper rotor cover plate until the second seam allowance of the end cover is contacted with the seam allowance of the non-transmission end of the stator, and pressing the second seam allowance of the end cover into the seam allowance of the non-transmission end of the stator by using a fastener;

s8: and disassembling a connecting piece between the first end cover and the base, lifting the stator and rotor assembly out of the base, turning the stator and rotor assembly into a horizontal state, and disassembling the upper cover plate and the lower cover plate to complete the stator and rotor assembling operation.

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