A permanent magnet motor rotor transfer structure and installation method

Abstract

The present invention belongs to the technical field of permanent magnet motors, and particularly relates to a novel permanent magnet motor rotor adapter structure and an installation method. The novel permanent magnet motor rotor adapter structure includes a rotor, an adapter plate, a first adapter shaft, a second adapter shaft, a double bearing, a bearing pressing plate, a motor body and a rotor disc. The rotor is composed of a rotating shaft and permanent magnets. A stop step is provided on the rotating shaft. The adapter plate is provided with a first positioning step, a second positioning step and a third positioning step. A plurality of first mounting holes are uniformly reserved on the outer circumference of the adapter plate, and a plurality of second mounting holes are uniformly reserved on the inner circumference. The first adapter shaft is provided with a mating surface. The motor body includes a casing and a stator. The stator is arranged inside the casing. A stepped surface is provided at the end of the rotor disc, solving the problems in the prior art that when installing the permanent magnet motor rotor, there is a strong adsorption force between the rotor and the motor stator, resulting in difficult rotor installation, easy scratching and damage of the surface of the permanent magnets, easy occurrence of industrial injury accidents, and at the same time damaging the bearings and reducing the service life of the motor.

Description

Technical Field

[0001] The present invention belongs to the technical field of permanent magnet motors, and particularly relates to a rotor transfer structure and an installation method of a permanent magnet motor. Background Art

[0002] A permanent magnet motor is a type of motor that does not require an excitation coil and excitation current, and uses permanent magnets to generate a permanent magnetic field. It has high efficiency and a simple structure. With the continuous improvement of the performance of permanent magnet materials and the development of motor technology, permanent magnet motors have been widely used in various industries. However, for permanent magnet motors, especially direct-drive permanent magnet motors, due to their application characteristics of low speed and high torque, their overall structure is flat and compact. To achieve high torque output in a limited space, it is necessary for the rotor part to provide a high magnetic field density. Therefore, the outer diameter of the rotor part is relatively large, and strong magnetic permanent magnet steels are installed. Then, during the process of assembling the rotor into the motor stator, there is a strong adsorption force between the magnet steel and the stator, which makes it difficult to arrange the rotor, and the surface of the magnet steel is easily scratched, damaged, etc. At the same time, it is also very easy to pinch the operator, with complex processes and low work efficiency.

[0003] Since the rotor structure of traditional permanent magnet motors is usually designed to be composed of a rotating shaft and magnet steels, and is installed in cooperation with the bearings at both ends and the motor stator part, the rotor inevitably needs to be inserted into the motor body. To cope with the adverse factor of the strong adsorption force when the rotor enters the motor stator for this rotor structure, the traditional solution is to add a non-magnetic conductive material between the rotor and the motor stator for isolation protection. However, this method only solves the influence of scratches and damage on the surface of the magnet steel, and cannot fundamentally solve the problem that when the rotor enters the motor stator, the strong adsorption force causes the rotor to shift to one side, and at the same time, it is easy to cause bearing damage and reduce the service life of the motor; or a special guiding positioning device is made specifically for this rotor structure, but the operation is complex and the efficiency is low. Summary of the Invention

[0004] The purpose of the present invention is to provide a new type of rotor transfer structure and installation method for a permanent magnet motor, which overcomes the deficiencies of the prior art and solves the problems in the prior art that there is a strong adsorption force between the rotor of the permanent magnet motor and the motor stator during installation, resulting in difficult rotor installation, easy scratching and damage of the surface of the magnet steel, easy occurrence of industrial injury accidents, and at the same time, damage to the bearings and reduction of the service life of the motor.

[0005] To solve the above problems, the technical solutions adopted by the present invention are as follows:

[0006] A new type of permanent magnet motor rotor transfer structure, including a rotor, a transfer disk, a first transfer shaft, a second transfer shaft, a motor body, a bearing pressing plate and a rotor disk; the rotor is composed of a rotating shaft and a permanent magnet, and a stop step is arranged on the rotating shaft, which is transferred in cooperation with the first positioning step of the transfer disk. At the same time, the transfer disk is provided with a second positioning step, which is transferred in cooperation with the bottom of the first transfer shaft. The mating surface of the first transfer shaft and the casing of the motor body are transferred through a double-bearing support structure, and the bearing pressing plate is used to fix the double bearings; the top of the first transfer shaft is transferred in cooperation with the step surface at the end of the rotor disk; the top of the second transfer shaft is transferred in cooperation with the third positioning step of the transfer disk;

[0007] Preferably, a plurality of first mounting holes are uniformly reserved on the outer circumference of the transfer disk, and a plurality of second mounting holes are uniformly reserved on the inner circumference. The first mounting holes are used to fix and transfer the rotor and the transfer disk with bolts, and the second mounting holes are used to fix and transfer the transfer disk and the top of the first transfer shaft with bolts; at the same time, the reserved mounting holes of the transfer disk are designed as counterbored holes to facilitate the bolts to sink without interfering with the transfer and installation process;

[0008] Preferably, the transfer disk is made of non-magnetic material;

[0009] Preferably, the mating surface of the first transfer shaft and the inner ring of the double bearings are in interference fit, and the top and bottom of the rotating shaft are chamfered as a mating guide for convenient installation;

[0010] Preferably, the outer diameter of the stator of the motor body and the inner hole of the casing are in clearance fit, and a stop boss and screw holes for fixing the stator connection are reserved in the casing;

[0011] Preferably, a plurality of mounting holes and fixing holes are reserved on the rotor disk. The mounting holes are used to fix and transfer the rotor disk and the first transfer shaft, and the fixing holes are used for the installation and fixation of the applied load;

[0012] Preferably, a plurality of mounting holes are reserved on the second transfer shaft for fixing and transferring with the transfer disk;

[0013] Preferably, the inner holes of the transfer disk, the first transfer shaft, the second transfer shaft and the rotor disk are all designed to be hollow, which is convenient for wiring and routing during application, and at the same time reduces weight and saves costs;

[0014] An installation method for a new type of permanent magnet motor rotor transfer structure specifically includes the following steps:

[0015] Step S1: Bond the permanent magnets to the surface of the rotating shaft in sequence, and align one side of the permanent magnet with the rotating shaft during bonding;

[0016] Step S2: placing the adapter plate on the rotating shaft of the rotor, with the first positioning step of the adapter plate contacting the stop step of the rotating shaft, and fixing the adapter plate and the rotating shaft with bolts through the reserved first mounting holes to achieve fixed connection between the rotor and the adapter plate;

[0017] Step S3: Pressing the two bearings into the bearing chamber of the motor body in sequence, simultaneously pressing the first transfer shaft into the inner ring of the bearing, and tightening and fixing the bearings by means of a bearing pressure plate, thereby achieving fixed transfer between the motor body and the first transfer shaft;

[0018] Step S4: placing the rotor into the housing, so that the second positioning step of the adapter plate contacts the bottom of the first adapter shaft, and the adapter plate and the first adapter shaft are fixedly connected using bolts through the reserved second mounting holes to achieve fixed connection between the adapter plate and the first adapter shaft;

[0019] Step S5: placing the rotor disk on the first transfer shaft, with the stepped surface at the end of the rotor disk contacting the top of the first transfer shaft, and fixing the rotor disk and the first transfer shaft with bolts through the reserved mounting holes to achieve fixed transfer between the rotor disk and the first transfer shaft;

[0020] Step S6: placing the second transfer shaft on the transfer plate, with the top of the second transfer shaft contacting the third positioning step of the transfer plate, and fixing the second transfer shaft and the transfer plate with bolts through the reserved mounting holes to achieve fixed transfer between the second transfer shaft and the transfer plate;

[0021] Step S7: The motor body is placed horizontally and fixed, and the stator is placed at the entrance of the casing. The stator is sucked into the casing by the strong suction force of the rotor, and the stator is fixed with bolts in the screw holes reserved in the casing.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention describes a novel permanent magnet motor rotor transfer structure and installation method, which fixedly transfers the rotor, the first transfer shaft, and the second transfer shaft through an transfer disk. At the same time, the first transfer shaft is used in conjunction with a dual-bearing support structure to achieve fixed transfer with the motor body and the rotor disk, completing the entire rotor assembly process; the motor body part reversely utilizes the strong suction force of the rotor to suck the stator into the motor body casing, thereby completing the entire assembly process; the installation process is simple and convenient to operate, with high efficiency, which can prevent the magnetic steel surface from being scratched or damaged, avoid operating accidents, and at the same time ensure reliable installation of the bearings and increase the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural schematic diagram of a new permanent magnet motor rotor transfer structure.

[0025] Figure 2 Cross-sectional view of a novel permanent magnet motor rotor adapter structure.

[0026] Figure 3 Flowchart of the steps of a method for installing a novel permanent magnet motor rotor adapter structure.

[0027] Description of the markings in the figure: 1 - rotor, 11 - permanent magnet, 12 - rotating shaft, 121 - stop step, 2 - adapter plate, 21 - first positioning step, 22 - second positioning step, 23 - third positioning step, 24 - first mounting hole, 25 - second mounting hole, 3 - first adapter shaft, 31 - mating surface, 4 - second adapter shaft, 5 - double bearing, 6 - bearing pressure plate, 7 - motor body, 71 - housing, 72 - stator, 8 - rotor disc, 81 - step surface. Detailed implementation mode

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0029] As shown in the figure, a novel permanent magnet motor rotor adapter structure described in the present invention includes a rotor 1, an adapter plate 2, a first adapter shaft 3, a second adapter shaft 4, a double bearing 5, a bearing pressure plate 6, a motor body 7 and a rotor disc 8; the rotor 1 is composed of a rotating shaft 12 and a permanent magnet 11, a stop step 121 is provided on the rotating shaft 12, the adapter plate 2 is provided with a first positioning step 21, a second positioning step 22 and a third positioning step 23, a plurality of first mounting holes 24 are uniformly reserved on the outer circumference of the adapter plate 2, and a plurality of second mounting holes 25 are uniformly reserved on the inner circumference. The first adapter shaft 3 is provided with a mating surface 31. The motor body 7 includes a housing 71 and a stator 72. The stator 72 is arranged inside the housing 71. The end of the rotor disc 8 is provided with a step surface 81. The stop step 121 is mated and adapted with the first positioning step 21 of the adapter plate 2. The second positioning step 22 is mated and adapted with the bottom of the first adapter shaft 3. The mating surface 31 of the first adapter shaft 3 is mated and adapted with the housing 71 of the motor body 7 through the double bearing 5. The bearing pressure plate 6 fixes the double bearing 5; the top of the first adapter shaft 3 is mated and adapted with the step surface 81 at the end of the rotor disc 8; the top of the second adapter shaft 4 is mated and adapted with the third positioning step 23 of the adapter plate 2;

[0030] Preferably, the first mounting hole 24 is used for fixing and transferring the rotor 1 and the adapter plate 2 with bolts, and the second mounting hole 25 is used for fixing and transferring the adapter plate 2 and the top of the first transfer shaft 3 with bolts; the first mounting hole 24 and the second mounting hole 25 reserved on the adapter plate are counterbores to facilitate the bolts to sink without interfering with the transfer and installation process; the adapter plate 2 is made of non-magnetic material; the mating surface 31 of the first transfer shaft 3 and the inner ring of the double bearing 5 are in interference fit, and the top and bottom of the rotating shaft are chamfered as mating guides for convenient installation; the outer diameter of the stator of the motor body 7 and the inner hole of the housing are in clearance fit, and stop bosses and screw holes for fixing the stator connection are reserved in the housing; multiple mounting holes and fixing holes are reserved on the rotor disk 8, the mounting holes are used for fixing and transferring the rotor disk and the first transfer shaft, and the fixing holes are used for mounting and fixing the applied load; multiple mounting holes are reserved on the second transfer shaft 4 for fixing and transferring with the adapter plate 2; the inner holes of the adapter plate 2, the first transfer shaft 3, the second transfer shaft 4, and the rotor disk 8 are all designed to be hollow, which is convenient for wiring and routing during application, and at the same time reduces weight and saves costs. Embodiment

[0031] An installation method for a rotor transfer structure of a new type of permanent magnet motor specifically includes the following steps:

[0032] Step S1: Bond the magnetic steel to the surface of the rotating shaft in sequence, and align the magnetic steel with one side of the rotating shaft during bonding;

[0033] Step S2: Place the adapter plate on the rotating shaft of the rotor, make the first positioning step of the adapter plate contact the stop step of the rotating shaft, and use bolts to fixedly connect the adapter plate and the rotating shaft through the reserved first mounting hole to realize the fixed transfer of the rotor and the adapter plate;

[0034] Step S3: Press the double bearings into the bearing chambers of the housing of the motor body in sequence, simultaneously press the first transfer shaft into the inner ring of the bearing, and press and fix the bearing through the bearing pressing plate to realize the fixed transfer of the motor body and the first transfer shaft;

[0035] Step S4: Place the rotor into the housing, make the second positioning step of the adapter plate contact the bottom of the first transfer shaft, and use bolts to fixedly connect the adapter plate and the first transfer shaft through the reserved second mounting hole to realize the fixed transfer of the adapter plate and the first transfer shaft;

[0036] Step S5: Place the rotor disk on the first transfer shaft, make the step surface at the end of the rotor disk contact the top of the first transfer shaft, and use bolts to fixedly connect the rotor disk and the first transfer shaft through the reserved mounting hole to realize the fixed transfer of the rotor disk and the first transfer shaft;

[0037] Step S6: placing the second transfer shaft on the transfer plate, with the top of the second transfer shaft contacting the third positioning step of the transfer plate, and fixing the second transfer shaft and the transfer plate with bolts through the reserved mounting holes to achieve fixed transfer between the second transfer shaft and the transfer plate;

[0038] Step S7: The motor body is placed horizontally and fixed, and the stator is placed at the entrance of the casing. The stator is sucked into the casing by the strong suction force of the rotor, and the stator is fixed with bolts in the screw holes reserved in the casing.

[0039] Working principle: The rotor, the first adapter shaft, and the second adapter shaft are fixedly connected through the adapter disk. At the same time, the first adapter shaft is used in conjunction with the double-bearing support structure to achieve fixed connection with the motor body and the rotor disk, completing the entire rotor assembly process; the motor body part then reversely uses the strong suction force of the rotor to suck the stator into the motor body casing, thereby completing the entire assembly process.

[0040] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A permanent magnet motor rotor transfer structure, characterized in that: It includes a rotor (1), an adapter plate (2), a first adapter shaft (3), a second adapter shaft (4), a double bearing (5), a bearing pressure plate (6), a motor body (7) and a rotor disc (8). The rotor (1) is composed of a rotating shaft (12) and a permanent magnet (11). A stop step (121) is provided on the rotating shaft (12). The adapter plate (2) is provided with a first positioning step (21), a second positioning step (22) and a third positioning step (23). A plurality of first mounting holes (24) are uniformly reserved on the outer circumference of the adapter plate (2), and a plurality of second mounting holes (25) are uniformly reserved on the inner circumference. The first adapter shaft (3) is provided with a mating surface (31). The motor body (7) includes a housing (71) and a stator (72). The stator (72) is arranged inside the housing (71). A step surface (81) is provided at the end of the rotor disc (8). The stop step (121) is mated and transferred with the first positioning step (21) of the adapter plate (2), and the second positioning step (22) is mated and transferred with the bottom of the first adapter shaft (3). The mating surface (31) of the first adapter shaft (3) is transferred with the housing (71) of the motor body (7) through the double bearing (5). The bearing pressure plate (6) fixes the double bearing (5); the top of the first adapter shaft (3) is mated and transferred with the step surface (81) at the end of the rotor disc (8); the top of the second adapter shaft (4) is mated and transferred with the third positioning step (23) of the adapter plate (2); the first mounting holes (24) are used to fixedly transfer the rotor (1) and the adapter plate (2) with bolts, and the second mounting holes (25) are used to fixedly transfer the adapter plate (2) and the top of the first adapter shaft (3) with bolts; the mating surface (31) of the first adapter shaft (3) and the inner ring of the double bearing (5) are in interference fit, and the top and bottom of the rotating shaft are chamfered; the outer diameter of the stator of the motor body (7) and the inner hole of the housing are in clearance fit, and a stop boss and screw holes for fixedly connecting the stator are reserved in the housing.

2. The rotor adapter structure of a permanent magnet motor according to claim 1, characterized in that: The first mounting holes (24) and the second mounting holes (25) reserved on the adapter plate are counterbored holes.

3. A permanent magnet motor rotor adapter structure according to claim 1, characterized in that: The adapter plate (2) is made of non-magnetic material.

4. A permanent magnet motor rotor adapter structure according to claim 1, characterized in that: A plurality of mounting holes and fixing holes are reserved on the rotor disc (8). The mounting holes are used for fixedly transferring the rotor disc and the first adapter shaft.

5. A permanent magnet motor rotor adapter structure according to claim 1, characterized in that: A plurality of mounting holes are reserved on the second adapter shaft (4) for fixedly transferring with the adapter plate (2).

6. A permanent magnet motor rotor adapter structure according to claim 1, characterized in that: The inner holes of the adapter plate (2), the first adapter shaft (3), the second adapter shaft (4) and the rotor disc (8) all adopt a hollow structure.

7. An installation method for a rotor transfer structure of a permanent magnet motor, characterized in that: Specifically, it includes the following steps: Step S1: Bond the permanent magnets to the surface of the rotating shaft in sequence. When bonding, the permanent magnets are aligned with one side of the rotating shaft. Step S2: Place the adapter plate on the rotating shaft of the rotor. The first positioning step of the adapter plate contacts the stop step of the rotating shaft. The adapter plate and the rotating shaft are fixedly connected with bolts through the reserved first mounting holes to realize the fixed transfer of the rotor and the adapter plate. Step S3: Pressing the two bearings into the bearing chamber of the motor body in sequence, simultaneously pressing the first transfer shaft into the inner ring of the bearing, and tightening and fixing the bearings by means of a bearing pressure plate, thereby achieving fixed transfer between the motor body and the first transfer shaft; Step S4: placing the rotor into the housing, so that the second positioning step of the adapter plate contacts the bottom of the first adapter shaft, and the adapter plate and the first adapter shaft are fixedly connected using bolts through the reserved second mounting holes to achieve fixed connection between the adapter plate and the first adapter shaft; Step S5: placing the rotor disk on the first transfer shaft, with the stepped surface at the end of the rotor disk contacting the top of the first transfer shaft, and fixing the rotor disk and the first transfer shaft with bolts through the reserved mounting holes to achieve fixed transfer between the rotor disk and the first transfer shaft; Step S6: placing the second transfer shaft on the transfer plate, with the top of the second transfer shaft contacting the third positioning step of the transfer plate, and fixing the second transfer shaft and the transfer plate with bolts through the reserved mounting holes to achieve fixed transfer between the second transfer shaft and the transfer plate; Step S7: The motor body is placed horizontally and fixed, and the stator is placed at the entrance of the casing. The stator is sucked into the casing by the strong suction force of the rotor, and the stator is fixed with bolts in the screw holes reserved in the casing.

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