One-time assembly tool and one-time assembly method for permanent magnet motor rotor into shell

Abstract

The present invention discloses a one-time assembly tool and one-time assembly method for a permanent magnet motor rotor entering a shell, which solves the problems of difficult operation and low assembly efficiency of the rotor entering the shell. The rotor entering the shell is arranged as a vertical shell entry mode. When the rotor enters the shell, a lower end guide rod is arranged at the AS end of the rotor, and the BS end cover is first assembled at the BS end of the rotor, and an upper end guide rod is arranged on the BS end cover. During the shell entry process, the upper and lower guide rods are mechanically limited, so that the rotor magnets always maintain an equal distance from the inner side wall of the stator core center hole during the shell entry process. The mechanical limit of the upper and lower guide rods overcomes the suction force between the rotor magnets and the base iron core, ensuring that the rotor enters the shell accurately. The tool completes the assembly of the motor in one go, which improves the assembly efficiency of the motor.

Description

Technical Field

[0001] The invention relates to a shell inserting tool for a permanent magnet motor rotor, and in particular to a shell inserting and one-time assembly tool and a one-time assembly method for a permanent magnet motor rotor. Background Art

[0002] Permanent magnet motors have the advantages of high efficiency, high power density and convenient speed regulation. The permanent magnet motor is assembled by completing the assembly of the base and the stator, and the assembly of the rotor and the magnetic steel thereon, and then assembling the rotor into the shell, that is, the rotor enters the base. During the shell entry process, since the rotor magnetic steel is magnetic, the rotor magnetic steel will produce an adsorption effect with the base and the stator, making it impossible to ensure the direction of the rotor entering the shell. The rotor will produce adsorption and collision with the stator, making the assembly process difficult to operate, and causing wire insulation damage and shell damage. In order to overcome the defect of rotor shell adsorption, the prior art divides the rotor shell entry and assembly into two processes, which has the defects of low motor assembly efficiency and low assembly quality. Summary of the invention

[0003] The invention provides a one-time assembly tool and one-time assembly method for a permanent magnet motor rotor into a shell, which solves the technical problems of difficult rotor shell insertion operation and low assembly efficiency.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The overall concept of the present invention is to set the rotor into the shell in a vertical upright shell entry mode, and when the rotor enters the shell, a lower end guide rod is set at the AS end of the rotor, and a BS end cover is first assembled at the BS end of the rotor, and an upper end guide rod is set on the BS end cover. During the shell entry process, the upper and lower guide rods are mechanically limited, so that the rotor magnets always maintain an equal distance from the inner side wall of the stator core center hole during the shell entry process. The mechanical limit of the upper and lower guide rods overcomes the suction force between the rotor magnets and the base iron core, ensuring that the rotor is accurately placed into the shell. The tooling completes the assembly of the motor at one time, thereby improving the assembly efficiency of the motor.

[0006] A permanent magnet motor rotor shell insertion and one-time assembly tool comprises a crane, a motor stator vertical placement base frame, a motor stator, a motor rotor and a motor base, a base connection hole for connecting a BS end cover is arranged on the base BS end of the motor base, the motor stator is assembled in the motor base, an AS end cover is arranged on the AS end of the motor base, the motor base is vertically placed on the base top plate on the motor stator vertical placement base frame through the AS end cover, a base middle plate is arranged on the motor stator vertical placement base frame directly below the AS end cover, a guide sleeve for passing a rotor shell insertion guide rod is arranged at the center of the base middle plate, a BS end cover is arranged on the BS end of the motor rotor, and a BS end cover is arranged on the BS end of the motor rotor. An end cover connecting hole for connecting the BS end cover is provided on the top, a lifting ring is provided on the shaft end of the motor rotor extending out of the BS end cover, an AS end cover bearing is installed on the AS end of the motor rotor, and a shell guide rod is connected to the shaft end of the AS end of the motor rotor. The overhead crane vertically lifts the motor rotor just above the motor stator through the lifting ring, an end cover guide rod is inserted into the end cover connecting hole for connecting the BS end cover on the BS end cover, the bottom end of the shell guide rod is inserted into the guide sleeve of the rotor guide rod, and the bottom end of the end cover guide rod is inserted into the base connecting hole for connecting the BS end cover on the motor base, and an assembly annular gap is formed between the center hole of the motor stator and the rotor magnet on the motor rotor.

[0007] An AS end end cover bearing shell guide sleeve is arranged on the AS end of the motor rotor below the AS end end cover bearing, and a guide sleeve conical surface is arranged at the lower end of the AS end end cover bearing shell guide sleeve; a connecting screw mounting hole is arranged on the shell guide rod, and an AS end top screw hole is arranged on the lower end surface of the AS end of the motor rotor, and the connecting screw connects the upper end of the shell guide rod and the AS end of the motor rotor together through the connecting screw mounting hole; the AS end end cover is fixed to the top plate of the chassis by fixing bolts.

[0008] A one-time assembly method for a permanent magnet motor rotor into a housing comprises the following steps:

[0009] The first step is to assemble the BS end cover on the BS end of the motor rotor, assemble the lifting ring on the shaft end of the motor rotor extending out of the BS end cover, assemble the AS end cover bearing on the AS end of the motor rotor, set the AS end cover bearing shell guide sleeve on the AS end of the motor rotor below the AS end cover bearing, set a guide sleeve conical surface at the lower end of the AS end cover bearing shell guide sleeve, and insert the end cover guide rod into the BS end cover connection hole on the BS end cover;

[0010] The second step is to set up a motor stator vertical placement base frame, set a base frame middle plate on the motor stator vertical placement base frame, and set a guide sleeve for the rotor shell entry guide rod at the center of the base frame middle plate; assemble the motor stator into the motor base, assemble the AS end cover on the AS end of the motor base, and vertically place the motor base on the base frame top plate on the motor stator vertical placement base frame through the AS end cover, and fix it with fixing bolts;

[0011] Step 3: The overhead crane vertically suspends the motor rotor just above the motor stator through the lifting ring, inserts the bottom end of the shell guide rod into the guide sleeve of the rotor guide rod, and inserts the bottom end of the end cover guide rod into the BS end cover connection base connection hole on the motor base, so that an assembly annular gap is formed between the center hole of the motor stator and the rotor magnetic steel on the motor rotor, and the width of the assembly annular gap is 2 mm;

[0012] Step 4. Use the overhead crane to slowly lower the motor rotor downward so that it enters the center hole of the motor stator. When the BS end cover is combined with the BS end on the motor base and the AS end cover bearing enters the AS end cover bearing hole, the shell hoisting is completed. After removing the end cover guide rod, fix the BS end cover and the BS end of the motor base together. By removing the connecting screws, separate the shell guide rod from the AS end of the motor rotor; remove the fixing bolts to complete the assembly of the entire motor; the AS end is the driving end of the motor, and the BS end is the non-driving end of the motor.

[0013] The present invention integrates the insertion of the rotor into the shell and the assembly of the stator and rotor. The concentric arrangement of the upper and lower guide rods and the anti-suction mechanical limit make the insertion of the rotor into the shell easy to operate, and the accuracy of the installation into the shell is greatly improved. The present invention is suitable for the assembly of permanent magnet motors of various specifications and sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the rotor of the present invention when it is inserted into the shell;

[0015] Figure 2 It is a schematic diagram of the structure of the rotor of the present invention after being put into the shell;

[0016] Figure 3 It is a schematic structural diagram of the rotor of the present invention before entering the shell;

[0017] Figure 4 It is a schematic diagram of the structure of the base of the present invention before waiting for the rotor to enter the shell;

[0018] Figure 5 It is a schematic diagram of the structure of the motor of the present invention after being assembled. DETAILED DESCRIPTION

[0019] The present invention is described in detail below in conjunction with the accompanying drawings:

[0020] A one-time assembly tool for a permanent magnet motor rotor into a shell, comprising a crane, a motor stator vertical placement base frame 24, a motor stator 21, a motor rotor 1 and a motor base 20, a base connection hole 22 for connecting a BS end cover is provided on the base BS end of the motor base 20, the motor stator 21 is assembled in the motor base 20, an AS end cover 18 is assembled on the AS end of the motor base 20, the motor base 20 is vertically placed on a base top plate 17 on the motor stator vertical placement base frame 24 through the AS end cover 18, a base middle plate 15 is arranged on the motor stator vertical placement base frame 24 directly below the AS end cover 18, a guide sleeve 16 for passing a rotor into the shell guide rod is arranged at the center of the base middle plate 15, a BS end cover 4 is assembled on the BS end 3 of the motor rotor 1, and a BS end cover connection hole 17 is arranged on the BS end cover 4. The motor rotor 1 is connected to the BS end cover 4 through the end cover connecting hole 14, a lifting ring 5 is arranged on the shaft end of the motor rotor 1 extending out of the BS end cover 4, an AS end cover bearing 7 is assembled on the AS end 6 of the motor rotor 1, and a shell guide rod 10 is connected to the shaft end of the AS end of the motor rotor 1. The overhead crane vertically lifts the motor rotor 1 just above the motor stator 21 through the lifting ring 5, and an end cover guide rod 23 is inserted in the end cover connecting hole 14 for BS end cover connection on the BS end end cover 4. The bottom end of the shell guide rod 10 is inserted in the guide sleeve 16 of the rotor guide rod, and the bottom end of the end cover guide rod 23 is inserted in the base connecting hole 22 for BS end cover connection on the motor base 20, and an assembly annular gap 25 is formed between the center hole of the motor stator 21 and the rotor magnet 2 on the motor rotor 1; the AS end is the driving end of the motor, and the BS end is the non-driving end of the motor.

[0021] An AS end cover bearing shell guide sleeve 8 is arranged on the AS end 6 of the motor rotor 1 below the AS end cover bearing 7, and a guide sleeve conical surface 9 is arranged at the lower end of the AS end cover bearing shell guide sleeve 8, and the AS end cover bearing shell guide sleeve 8 is made of rubber; a connecting screw mounting hole 11 is arranged on the shell guide rod 10, and an AS end top screw hole 13 is arranged on the lower end surface of the AS end 6 of the motor rotor 1, and a connecting screw 12 connects the upper end of the shell guide rod 10 with the AS end 6 of the motor rotor 1 through the connecting screw mounting hole 11; the AS end cover 18 is fixed to the top plate 17 of the chassis by fixing bolts 19; the present invention The tooling of the invention utilizes the structure on the motor product, such as the base connection hole 22 for connecting the BS end cover, the end cover connection hole 14 for connecting the BS end cover and the AS end top screw hole 13 on the motor base 20, and a through guide sleeve 16 for the rotor shell guide rod is arranged at the center of the base middle plate 15. Through the matching and limiting of the lower guide rod, that is, the shell entry guide rod 10 and the through guide sleeve 16, and the upper guide rod, that is, the end cover guide rod 23, which is inserted between the base connection hole 22 for connecting the BS end cover and the end cover connection hole 14 for connecting the BS end cover, the dynamic positioning and limiting of the motor rotor 1 entering the shell are formed, so that the shell entry is efficient, safe and accurate.

[0022] A one-time assembly method for a permanent magnet motor rotor into a housing comprises the following steps:

[0023] The first step is to assemble the BS end cover 4 on the BS end 3 of the motor rotor 1, assemble the lifting ring 5 on the shaft end of the motor rotor 1 extending out of the BS end cover 4, assemble the AS end cover bearing 7 on the AS end 6 of the motor rotor 1, set the AS end cover bearing shell guide sleeve 8 on the AS end 6 of the motor rotor 1 below the AS end cover bearing 7, set the guide sleeve conical surface 9 at the lower end of the AS end cover bearing shell guide sleeve 8, and insert the end cover guide rod 23 into the BS end cover connection hole 14 on the BS end cover 4;

[0024] Step 2: Set up a motor stator vertical placement chassis 24, set a chassis middle plate 15 on the motor stator vertical placement chassis 24, set a guide sleeve 16 for the rotor shell guide rod to pass through the chassis middle plate 15 at the center of the chassis middle plate 15; assemble the motor stator 21 into the motor base 20, assemble the AS end cover 18 on the AS end of the motor base 20, and vertically place the motor base 20 on the chassis top plate 17 on the motor stator vertical placement chassis 24 through the AS end cover 18, and fix it with fixing bolts 19;

[0025] Step 3: The overhead crane vertically suspends the motor rotor 1 above the motor stator 21 through the suspension ring 5, inserts the bottom end of the housing guide rod 10 into the guide sleeve 16 of the rotor guide rod, and inserts the bottom end of the end cover guide rod 23 into the BS end cover connection base connection hole 22 on the motor base 20, so that an assembly annular gap 25 is formed between the center hole of the motor stator 21 and the rotor magnet 2 on the motor rotor 1, and the width of the assembly annular gap 25 is 2 mm;

[0026] Step 4: Use the overhead crane to slowly lower the motor rotor 1 downward so that it enters the center hole of the motor stator 21. When the BS end cover 4 is combined with the BS end on the motor base 20, and the AS end cover bearing 7 enters the bearing hole of the AS end cover 18, the shell hoisting is completed. After removing the end cover guide rod 23, the BS end cover 4 is fixedly connected to the BS end of the motor base 20. By removing the connecting screws 12, the shell guide rod 10 is separated from the AS end 6 of the motor rotor 1; remove the fixing bolts 19 to complete the assembly of the entire motor.

Claims

1. A one-time assembly tool for a permanent magnet motor rotor into a housing, comprising an overhead crane, a motor stator vertical placement chassis (24), a motor stator (21), a motor rotor (1) and a motor base (20), wherein a base connection hole (22) for connecting a BS end cover is provided on the base BS end of the motor base (20), and the motor stator (21) is assembled in the motor base (20), characterized in that: An AS end cover (18) is mounted on the AS end of the motor base (20). The motor base (20) is vertically mounted on a base frame top plate (17) on a motor stator vertical mounting base frame (24) through the AS end cover (18). A base frame middle plate (15) is arranged on the motor stator vertical mounting base frame (24) directly below the AS end cover (18). A guide sleeve (16) for passing a rotor casing guide rod is arranged at the center of the base frame middle plate (15). A BS end cover (4) is mounted on the BS end (3) of the motor rotor (1). The cover (4) is provided with an end cover connection hole (14) for connecting the BS end cover, a lifting ring (5) is provided on the shaft end of the motor rotor (1) extending out of the BS end cover (4), an AS end cover bearing (7) is mounted on the AS end (6) of the motor rotor (1), and a housing entry guide rod (10) is connected to the AS end shaft end of the motor rotor (1). The overhead crane vertically lifts the motor rotor (1) directly above the motor stator (21) through the lifting ring (5), and an end cover guide rod (10) is inserted into the end cover connection hole (14) for connecting the BS end cover on the BS end cover (4). The guide rod (23) is inserted into the guide sleeve (16) of the rotor guide rod at the bottom end of the end cover guide rod (23), and the bottom end of the end cover guide rod (23) is inserted into the BS end cover connection base connection hole (22) on the motor base (20). An assembly annular gap (25) is formed between the central hole of the motor stator (21) and the rotor magnetic steel (2) on the motor rotor (1). The width of the assembly annular gap (25) is 2 mm. An AS end cover bearing is provided on the AS end (6) of the motor rotor (1) below the AS end cover bearing (7). A guide sleeve (8) is provided at the lower end of the AS end cover bearing housing guide sleeve (8) with a guide sleeve conical surface (9); a connecting screw mounting hole (11) is provided on the housing guide rod (10); an AS end top screw hole (13) is provided on the lower end surface of the AS end (6) of the motor rotor (1); a connecting screw (12) connects the upper end of the housing guide rod (10) and the AS end (6) of the motor rotor (1) through the connecting screw mounting hole (11); and the AS end cover (18) is fixed to the bottom frame top plate (17) by fixing bolts (19).

2. A one-time assembly method for a permanent magnet motor rotor into a shell, which is performed using the one-time assembly tool for a permanent magnet motor rotor into a shell according to claim 1, comprising the following steps: The first step is to assemble a BS end cover (4) on the BS end (3) of the motor rotor (1), assemble a lifting ring (5) on the shaft end of the motor rotor (1) extending out of the BS end cover (4), assemble an AS end cover bearing (7) on the AS end (6) of the motor rotor (1), arrange an AS end cover bearing housing guide sleeve (8) on the AS end (6) of the motor rotor (1) below the AS end cover bearing (7), arrange a guide sleeve conical surface (9) on the lower end of the AS end cover bearing housing guide sleeve (8), and insert an end cover guide rod (23) into the BS end cover connection hole (14) on the BS end cover (4); Step 2: erecting a motor stator vertical placement base frame (24), setting a base frame middle plate (15) on the motor stator vertical placement base frame (24), and setting a rotor shell guide rod through a guide sleeve (16) at the center of the base frame middle plate (15); assembling the motor stator (21) into the motor base (20), assembling the AS end cover (18) on the AS end of the motor base (20), and vertically placing the motor base (20) on the base frame top plate (17) on the motor stator vertical placement base frame (24) through the AS end cover (18), and fixing it with fixing bolts (19); Step 3: The overhead crane vertically suspends the motor rotor (1) above the motor stator (21) through the lifting ring (5), inserts the bottom end of the housing guide rod (10) into the guide sleeve (16) of the rotor guide rod, and inserts the bottom end of the end cover guide rod (23) into the BS end cover connection base connection hole (22) on the motor base (20), so that an assembly annular gap (25) is formed between the center hole of the motor stator (21) and the rotor magnet (2) on the motor rotor (1), and the width of the assembly annular gap (25) is 2 mm; Step 4: Use the overhead crane to slowly lower the motor rotor (1) downward so that it enters the center hole of the motor stator (21). When the BS end cover (4) is combined with the BS end on the motor base (20) and the AS end cover bearing (7) enters the bearing hole of the AS end cover (18), the shell hoisting is completed. After removing the end cover guide rod (23), the BS end cover (4) is fixedly connected to the BS end of the motor base (20). By removing the connecting screw (12), the shell guide rod (10) is separated from the AS end (6) of the motor rotor (1); remove the fixing bolt (19) to complete the assembly of the entire motor.

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