Motor stator and rotor assembly device and method

Abstract

The stator-rotor assembly device and method of the motor include a stator displacement device for driving the stator to rotate to change the axial orientation of the stator, a grabbing sling for hoisting the rotor, and an automatic bolt tightening device for automatically tightening the connecting bolts between the rotor end cover and the stator base. The stator displacement device is connected to the stator base, the grabbing sling is connected to the rotor shaft extension end, the automatic bolt tightening device is matched with the connecting bolts, the rotor is installed in the stator as the connecting bolts are tightened, and the rotor end cover is interference-fitted with the stator base as the connecting bolts are tightened. The present invention realizes the automatic rotation of the stator and the positioning after the rotation, ensures that the stator and the rotor are vertically assembled, and when the connecting bolts are fully tightened, the stator and rotor are assembled, and the rotor end cover and the stator base are interference-fitted, thereby improving the automation level of the stator-rotor assembly and having high versatility and practicality.

Description

Technical Field

[0001] The invention relates to a motor stator and rotor assembly device and method, belonging to the technical field of motor stator and rotor assembly. Background Art

[0002] The stator and rotor assembly of traction motors has always been a technical challenge, mainly due to the following reasons:

[0003] 1. The air gap of the traction motor is small, within 2mm; the motor bearing assembly clearance is small, within 0.10mm. The stator and rotor core length is large, and the stator and rotor assembly stroke is long; when assembling the stator and rotor, it is necessary not only to determine the three linear directions X\Y\Z between the stator and rotor, but also the three rotation directions X\Y\Z. During the assembly process, the friction and collision between the stator and rotor can easily cause damage to the stator winding and bearings.

[0004] 2. The stoppers of the end covers and stators of various types of traction rotors are interference fit. When assembling the stator and rotor, a certain amount of pressing force is required to ensure that they are assembled in place.

[0005] 3. When the stators and rotors of various types of traction motors are assembled, the end cover and the stator have a relative angular position relationship.

[0006] When assembling the stator and rotor of existing traction motors, the rotor is usually manually hoisted by a rotor hoist using an overhead crane, and a positioning guide tool is installed on the rotor to improve the assembly guide accuracy, and the stator and rotor assembly operation is completed manually. The disadvantages of the existing manual stator and rotor assembly operation are mainly:

[0007] ① The positioning accuracy of the manual lifting rotor is low, which can easily cause damage to the stator windings and bearings during the assembly process.

[0008] ② The waiting time for the overhead crane is long and the lifting operation efficiency is low.

[0009] ③ When the matching length between some rotor end covers and stator stoppers is large and the stopper size of spare parts is at the limit deviation, the stator-rotor assembly operation requires the bolts to be tightened at both ends of the motor at the same time, which requires two people to work together and has low work efficiency. Summary of the invention

[0010] The motor stator and rotor assembly device and method provided by the present invention realize automatic indexing of the stator and positioning after indexing, ensure that the stator and the rotor are vertically assembled, and overcome the interference fit resistance between the rotor end cover and the stator base and the stator and rotor assembly pressure through the tension generated by tightening the bolts. When the connecting bolts are fully tightened, the stator and rotor are assembled, and the interference fit between the rotor end cover and the stator base is also achieved, thereby improving the automation level of the stator and rotor assembly, and having high versatility and practicality.

[0011] In order to achieve the above object, the technical solution adopted by the present invention is:

[0012] The stator-rotor assembly device of a motor is characterized in that it includes a stator displacement device for driving the stator to rotate to change the axial orientation of the stator, a grabbing sling for hoisting the rotor, and an automatic bolt tightening device for automatically tightening the connecting bolts between the rotor end cover and the stator base. The stator displacement device is connected to the stator base, the grabbing sling is connected to the rotor shaft extension end, the automatic bolt tightening device is cooperatively connected to the connecting bolts, the rotor is installed in the stator as the connecting bolts are tightened, and the rotor end cover is interference-fitted with the stator base as the connecting bolts are tightened.

[0013] Preferably, the stator displacement device comprises a driving device and a flange connection plate drivingly connected to the driving device, a displacement plate cooperating with the flange connection plate is mounted on the stator base, and the flange connection plate is locked with the displacement plate to drive the stator to rotate.

[0014] Preferably, the driving device has a telescopic moving part that drives the flange connecting plate to move axially, and the telescopic moving part pushes the flange connecting plate to move axially to lock with the displacement plate or pulls the flange connecting plate to move back axially to separate from the displacement plate.

[0015] Preferably, there are two automatic bolt tightening devices, each corresponding to a rotor end cover. The automatic tightening device includes an automatic tightening shaft connected to the transmission device and cooperated with the connecting bolt, and a position adjustment device for adjusting the position of the automatic tightening shaft. The automatic tightening shaft is parallel to the rotor axis, the position adjustment device is perpendicular to the rotor axis, and the automatic tightening shaft is movably mounted on the position adjustment device.

[0016] Preferably, an elastic clamping device is mounted on the automatic tightening shaft, and the elastic clamping force of the elastic clamping device is parallel to the automatic tightening shaft and presses the rotor end cover toward the stator frame or presses the stator frame toward the rotor end cover.

[0017] Preferably, the elastic clamping device includes an upper pressure plate fixed on the automatic tightening shaft, a lower support block parallel to the upper pressure plate, and a compression spring compressed between the upper pressure plate and the lower support block, the compression spring is parallel to the automatic tightening shaft, and the lower support block is connected to the rotor end cover or the stator frame.

[0018] Preferably, the compression spring is sleeved on the positioning column, and the positioning column is fixed between the upper pressing plate and the lower supporting block.

[0019] Preferably, the upper pressure plate is perpendicular to the rotor axis, and the grabbing sling is provided with a guide connecting plate parallel to the upper pressure plate, a guide column is connected between the guide connecting plate and the rotor end cover, and the guide column guide fits through the upper pressure plate.

[0020] The motor stator and rotor assembly method adopts the motor stator and rotor assembly device described above to assemble the stator and rotor. First, the stator is rotated axially to the vertical direction by a stator displacement device, and then the rotor is hoisted above the stator by a grabbing sling. After that, the automatic bolt tightening device is connected with the connecting bolts, and the connecting bolts are passed through the corresponding screw holes of the rotor end cover and the stator base. Then, the automatic tightening device is started to tighten the connecting bolts. During the tightening process, the rotor is gradually pushed into the stator. When the connecting bolts are fully tightened into place, the interference fit of the rotor end cover and the stator base and the assembly of the stator and rotor are completed.

[0021] Preferably, "use a grabbing sling to hoist the rotor above the stator, then cooperate and connect the automatic bolt tightening device with the connecting bolts, and pass the connecting bolts through the corresponding screw holes of the rotor end cover and the stator base" specifically means using a grabbing sling to hoist the rotor above the stator, and then use a position adjustment device to adjust the position of the automatic tightening shaft according to the position distribution of the connecting bolts on the stator base, and then cooperate and connect the automatic tightening shaft with the connecting bolts to align the connecting bolts with the corresponding screw hole axes on the stator base, and then use a guide column to pass through the upper pressure plate to angularly position the rotor, and then connect the guide column to the rotor end cover, and then pass the automatic tightening shaft through the corresponding screw holes of the rotor end cover and the stator base.

[0022] The beneficial effects of the invention are:

[0023] 1. In the motor stator-rotor assembly device of the present invention, a stator displacement device is used to drive the stator to rotate to change the axial orientation of the stator, thereby realizing automatic rotation of the stator and positioning after rotation, and ensuring that the stator and the rotor are vertically assembled.

[0024] 2. Automatically tighten the connecting bolts between the rotor end cover and the stator frame with the automatic bolt tightening device to ensure that the connecting bolts between the end covers at both ends of the rotor and the stator frame are tightened synchronously, with high tightening efficiency and consistent tightening torque. At the same time, the tension generated by the bolt tightening overcomes the stator-rotor assembly pressure, pulls the rotor into the stator, and achieves efficient assembly, reducing manual labor intensity. The tightening process of the connecting bolts is also the interference fit process of the rotor end cover and the stator frame. The tension generated by the bolt tightening overcomes the interference fit resistance between the rotor end cover and the stator frame. When the connecting bolts are fully tightened, the stator and rotor are assembled, and the rotor end cover and the stator frame are interference fit, thereby improving the automation level of the stator-rotor assembly.

[0025] 3. The automatic bolt tightening device includes an automatic tightening shaft and a position adjustment device. The position adjustment device is used to adjust the position of the automatic tightening shaft so as to adjust the position of the automatic tightening shaft according to the height and horizontal position of the rotor end cover and the center distance of the connecting bolts, thereby realizing automatic adjustment of the position of the automatic tightening shaft in the X\Y\Z directions to meet the stator and rotor assembly requirements of different motors and improve the versatility and practicality of the motor stator and rotor assembly device.

[0026] 4. A guide connecting plate is set on the grabbing and lifting device, and the guide connecting plate is used to connect the guide column. After the rotor is grabbed and lifted and placed on top of the stator, the guide column guides and cooperates to penetrate the upper pressure plate to perform angular positioning on the rotor end cover to ensure that the corresponding screw holes on the rotor end cover and the stator base are axially aligned, thereby ensuring the accurate placement of the connecting bolts, and the guide column is used to perform angular positioning and guide the rotor during the assembly process to ensure smooth assembly of the stator and rotor and improve the reliability of the assembly device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the motor stator and rotor assembly device when assembling the stator and rotor in a specific implementation manner. DETAILED DESCRIPTION

[0028] Combine the following Figure 1 The embodiments of the present invention are described in detail.

[0029] The motor stator and rotor assembly device is characterized in that it includes a stator displacement device 1 for driving the stator to rotate to change the axial orientation of the stator, a grabbing sling 2 for hoisting the rotor, and an automatic bolt tightening device 3 for automatically tightening the connecting bolts 102 between the rotor end cover 100 and the stator base 101. The stator displacement device 1 is connected to the stator base 101, the grabbing sling 2 is connected to the rotor shaft extension end 103, the automatic bolt tightening device 3 is matched with the connecting bolts 102, the rotor is installed in the stator as the connecting bolts 102 are tightened, and the rotor end cover 100 is interference fit with the stator base 101 as the connecting bolts 102 are tightened.

[0030] In the motor stator-rotor assembly device shown in the figure, the stator displacement device 1 is used to drive the stator to rotate to change the axial orientation of the stator, realize the automatic rotation of the stator and the positioning after the rotation, and ensure that the stator and the rotor are vertically assembled.

[0031] The automatic bolt tightening device 3 is used to automatically tighten the connecting bolts 102 between the rotor end cover 100 and the stator frame 101, ensuring that the connecting bolts between the end covers at both ends of the rotor and the stator frame are tightened synchronously, with high tightening efficiency and consistent tightening torque. At the same time, the tension generated by the bolt tightening overcomes the stator-rotor assembly pressure, pulls the rotor into the stator, achieves efficient assembly, and reduces manual labor intensity. The tightening process of the connecting bolts 102 is also the interference fit process of the rotor end cover 100 and the stator frame 101. The tension generated by the bolt tightening overcomes the interference fit resistance between the rotor end cover 100 and the stator frame 101. When the connecting bolts 102 are fully tightened, the stator and rotor are assembled, and the interference fit of the rotor end cover and the stator frame is achieved, thereby improving the automation level of the stator-rotor assembly.

[0032] The stator displacement device 1 comprises a driving device 11 and a flange connection plate 12 which is transmission-connected to the driving device 11. A displacement plate 4 which cooperates with the flange connection plate 12 is mounted on the stator base 101. The flange connection plate 12 is locked with the displacement plate 4 to drive the stator to rotate. The driving device 11 drives the flange connection plate 12 to rotate, and the flange connection plate 12 drives the displacement plate 4 to drive, thereby realizing the rotation of the stator, turning the stator from horizontal to vertical, and maintaining the vertical state.

[0033] The driving device 11 has a telescopic moving part 11.1 that drives the flange connection plate 12 to move axially, and the telescopic moving part 11.1 pushes the flange connection plate 12 to move axially to lock with the displacement plate 4 or pulls the flange connection plate 12 to move back axially to separate from the displacement plate 4. The telescopic moving part 11.1 drives the flange connection plate 12 to move and lock or separate with the displacement plate 4, thereby realizing the rapid connection and separation of the positioning displacement device 1 and the stator, and improving the automation level of the stator-rotor assembly.

[0034] There are two automatic bolt tightening devices 3, which correspond to the rotor end caps 100 respectively. The automatic tightening devices 3 include an automatic tightening shaft 31 connected to the transmission device and connected to the connecting bolts 102, and a position adjustment device 32 for adjusting the position of the automatic tightening shaft 31. The automatic tightening shaft 31 is parallel to the rotor axis, the position adjustment device 32 is perpendicular to the rotor axis, and the automatic tightening shaft 31 is movably mounted on the position adjustment device 32. The position adjustment device 32 is used to adjust the position of the automatic tightening shaft 31, so as to adjust the position of the automatic tightening shaft 31 according to the height, horizontal position and center spacing of the rotor end cap, and realize the automatic adjustment of the position of the automatic tightening shaft 31 in the three directions of X\Y\Z, so as to meet the requirements of stator and rotor assembly of different motors and improve the versatility and practicality of the stator and rotor assembly device of the motor.

[0035] The elastic clamping device 33 is installed on the automatic tightening shaft 31, and the elastic clamping force of the elastic clamping device 33 is parallel to the automatic tightening shaft 31 and presses the rotor end cover 100 to the stator base 101 or presses the stator base 101 to the rotor end cover 100. The elastic clamping device 33 includes an upper pressing plate 33.1 fixed on the automatic tightening shaft 31, a lower supporting block 33.2 parallel to the upper pressing plate 33.1, and a compression spring 33.3 compressed between the upper pressing plate 33.1 and the lower supporting block 33.2, the compression spring 33.3 is parallel to the automatic tightening shaft 31, and the lower supporting block 33.1 is connected to the rotor end cover 100 or the stator base 101. The elastic pressing force of the compression spring 33.3 acts on the rotor end cover 100 or the stator frame 101. The elastic pressing force acts together with the tightening force of the connecting bolt 102 to overcome the stator-rotor assembly pressure and the interference fit resistance between the rotor end cover 100 and the stator frame 101, ensuring that the rotor is smoothly and efficiently installed in the stator.

[0036] The compression spring 33.3 is sleeved on the positioning column 33.4, and the positioning column 33.4 is fixed between the upper pressing plate 33.1 and the lower supporting block 33.2. The positioning column 33.4 prevents the compression spring 33.3 from deflecting, ensuring that the elastic pressing force and the automatic tightening shaft 31 are always kept parallel.

[0037] The upper pressure plate 33.1 is perpendicular to the rotor axis, and the grabbing sling 2 has a guide connecting plate 2.1 parallel to the upper pressure plate 33.1. A guide column 5 is connected between the guide connecting plate 2.1 and the rotor end cover 100, and the guide column 5 guides and cooperates to pass through the upper pressure plate 33.1. After the rotor is hoisted onto the top of the stator by the grabbing and lifting device 2, the guide column 5 is used to pass through the upper pressure plate 33.1 to angularly position the rotor, and then the guide column 5 is connected to the rotor end cover 100, and then the connecting bolt 102 is passed through the corresponding screw holes of the rotor end cover 100 and the stator base 101. That is, after the rotor is grabbed and hoisted and placed on the stator, the guide column 5 is guided and cooperated to pass through the upper pressure plate 33.1 to angularly position the rotor end cover to ensure that the corresponding screw holes on the rotor end cover 100 and the stator base 101 are axially aligned, thereby ensuring the accurate placement of the connecting bolt 102, and the guide column 5 is used to angularly position the rotor and guide the column during the assembly process to ensure smooth assembly of the stator and rotor, thereby improving the reliability of the assembly device.

[0038] The present invention also protects a method for assembling a motor stator and rotor, which uses the above motor stator and rotor assembling device to assemble the stator and rotor. First, the stator is rotated axially to the vertical direction using the stator displacement device 1, and then the rotor is hoisted above the stator using the grabbing sling 2. Thereafter, the bolt automatic tightening device 3 is connected with the connecting bolt 102, and the connecting bolt 102 is passed through the corresponding screw holes of the rotor end cover 100 and the stator base 101, and then the automatic tightening device 3 is started to tighten the connecting bolt 102. During the tightening process, the rotor is gradually pushed into the stator. When the connecting bolt 102 is fully tightened into place, the interference fit of the rotor end cover 100 and the stator base 101 and the assembly of the stator and rotor are completed.

[0039] The above-mentioned motor stator and rotor assembly method uses a stator displacement device 1 to drive the stator to rotate to change the axial orientation of the stator, realizes the automatic rotation of the stator and the positioning after rotation, and ensures that the stator and the rotor are vertically assembled. The automatic bolt tightening device 3 is used to automatically tighten the connecting bolts 102 between the rotor end cover 100 and the stator frame 101, ensuring that the connecting bolts between the end covers at both ends of the rotor and the stator frame are tightened synchronously, with high tightening efficiency and consistent tightening torque. At the same time, the tension generated by the bolt tightening overcomes the stator and rotor assembly pressure, pulls the rotor into the stator, and realizes efficient assembly, reduces the intensity of manual work, and the tightening process of the connecting bolt 102 is also the interference fit process of the rotor end cover and the stator frame. The tension generated by the bolt tightening overcomes the interference fit resistance of the rotor end cover 100 and the stator frame 101. When the connecting bolt 102 is fully tightened, the stator and rotor are assembled, and the rotor end cover and the stator frame are interference fit, thereby improving the automation level of the stator and rotor assembly.

[0040] Among them, "use the grabbing sling 2 to lift the rotor above the stator, then connect the automatic bolt tightening device 3 with the connecting bolts 102, and pass the connecting bolts 102 through the corresponding screw holes of the rotor end cover 100 and the stator base 101" specifically refers to using the grabbing sling 2 to lift the rotor above the stator, and then use the position adjustment device 32 to adjust the position of the automatic tightening shaft 31 according to the position distribution of the connecting bolts 102 on the stator base 101, and then connect the automatic tightening shaft 31 with the connecting bolts 102 to align the connecting bolts 102 with the corresponding screw holes on the stator base 101, and then use the guide column 5 to pass through the upper pressure plate 33.1 to angularly position the rotor, and then connect the guide column 5 to the rotor end cover 100, and then pass the automatic tightening shaft 31 through the corresponding screw holes of the rotor end cover 100 and the stator base 101. The guide column 5 is guided through the upper pressure plate to perform angular positioning on the rotor end cover 100, ensuring that the corresponding screw holes on the rotor end cover 100 and the stator frame 101 are axially aligned, thereby ensuring the accurate insertion of the connecting bolts 102, and the guide column 5 is used to perform angular positioning and guide the rotor during the assembly process, ensuring smooth assembly of the stator and rotor, thereby improving the reliability of the assembly device.

[0041] The above is a complete description of the technical solutions of the embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the described embodiments are only part of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

Claims

1. A motor stator and rotor assembly device, characterized in that: The invention comprises a stator displacement device (1) for driving the stator to rotate so as to change the axial orientation of the stator, a grabbing sling (2) for hoisting the rotor, and an automatic bolt tightening device (3) for automatically tightening the connecting bolts (102) between the rotor end cover (100) and the stator base (101); the stator displacement device (1) is connected to the stator base (101); the grabbing sling (2) is connected to the rotor shaft extension end (103); the automatic bolt tightening device (3) is cooperatively connected to the connecting bolts (102); the rotor is installed in the stator as the connecting bolts (102) are tightened; and the rotor end cover (100) is interference-fitted with the stator base (101) as the connecting bolts (102) are tightened; The number of the automatic bolt tightening devices (3) is two, each corresponding to a rotor end cover (100). The automatic tightening device (3) comprises an automatic tightening shaft (31) connected to the transmission device and cooperatively connected to the connecting bolt (102), and a position adjustment device (32) for adjusting the position of the automatic tightening shaft (31). The automatic tightening shaft (31) is parallel to the rotor axis, the position adjustment device (32) is perpendicular to the rotor axis, and the automatic tightening shaft (31) is movably mounted on the position adjustment device (32); The automatic tightening shaft (31) is provided with an elastic pressing device (33), the elastic pressing force of the elastic pressing device (33) is parallel to the automatic tightening shaft (31) and presses the rotor end cover (100) toward the stator base (101) or presses the stator base (101) toward the rotor end cover (100); The elastic clamping device (33) comprises an upper pressing plate (33.1) fixed on the automatic tightening shaft (31), a lower supporting block (33.2) parallel to the upper pressing plate (33.1), and a compression spring (33.3) compressed between the upper pressing plate (33.1) and the lower supporting block (33.2), wherein the compression spring (33.3) is parallel to the automatic tightening shaft (31), and the lower supporting block (33.2) is connected to the rotor end cover (100) or the stator base (101); The compression spring (33.3) is sleeved on the positioning column (33.4), and the positioning column (33.4) is fixed between the upper pressing plate (33.1) and the lower supporting block (33.2); The upper pressure plate (33.1) is perpendicular to the rotor axis. The grabbing sling (2) has a guide connecting plate (2.1) parallel to the upper pressure plate (33.1). A guide column (5) is connected between the guide connecting plate (2.1) and the rotor end cover (100). The guide column (5) guides and fits through the upper pressure plate (33.1).

2. The motor stator and rotor assembly device according to claim 1, characterized in that The stator displacement device (1) comprises a driving device (11) and a flange connection plate (12) drivingly connected to the driving device (11); a displacement plate (4) cooperating with the flange connection plate (12) is mounted on the stator base (101); the flange connection plate (12) and the displacement plate (4) are locked to drive the stator to rotate.

3. The motor stator and rotor assembly device according to claim 2, characterized in that The driving device (11) comprises a telescopic moving part (11.1) for driving the flange connecting plate (12) to move axially. The telescopic moving part (11.1) pushes the flange connecting plate (12) to move axially to be locked with the displacement plate (4) or pulls the flange connecting plate (12) to move back axially to be separated from the displacement plate (4).

4. A method for assembling a motor stator and rotor, comprising: assembling the stator and rotor using the motor stator and rotor assembling device according to any one of claims 1 to 3, firstly, using a stator displacement device (1) to rotate the stator axially to a vertical direction, then using a grabbing sling (2) to sling the rotor above the stator, then connecting the automatic bolt tightening device (3) with the connecting bolts (102), and passing the connecting bolts (102) through the corresponding screw holes of the rotor end cover (100) and the stator base (101), and then starting the automatic tightening device (3) to tighten the connecting bolts (102), and gradually pushing the rotor into the stator during the tightening process, and when the connecting bolts (102) are fully tightened into place, the interference fit of the rotor end cover (100) and the stator base (101) and the assembly of the stator and rotor are completed.

5. The motor stator and rotor assembly method according to claim 4, characterized in that "Using the grabbing sling (2) to hoist the rotor above the stator, then cooperating the bolt automatic tightening device (3) with the connecting bolts (102), and passing the connecting bolts (102) through the corresponding screw holes of the rotor end cover (100) and the stator base (101)" specifically refers to using the grabbing sling (2) to hoist the rotor above the stator, and then adjusting the automatic tightening device (32) according to the position distribution of the connecting bolts (102) on the stator base (101). The automatic tightening shaft (31) is then connected to the connecting bolt (102) so that the connecting bolt (102) is aligned with the corresponding screw hole on the stator base (101). The guide column (5) is then passed through the upper pressure plate (33.1) to perform angular positioning on the rotor. The guide column (5) is then connected to the rotor end cover (100). The automatic tightening shaft (31) is then passed through the corresponding screw holes of the rotor end cover (100) and the stator base (101).

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