A permanent magnet motor stator and rotor assembling device and assembling method

Abstract

The application provides a permanent magnet motor stator and rotor assembling device, which comprises a rack and a supporting frame installed on the rack, a pressing machine is installed on the supporting frame, a placing table is placed below the pressing machine, the placing table is used for placing a rotor, the pressing machine is used for hoisting a stator and pressing the stator and the rotor to assemble; the device further comprises a tooling assembly and a picking mechanism, the picking mechanism is installed on the pressing output end of the pressing machine, the tooling assembly comprises a tooling seat and a sleeve, and a positioning hole corresponding to the center hole of the stator is formed in the middle part of the tooling seat; the tooling seat is placed below the picking mechanism and is used for connecting with the stator and being picked by the picking mechanism; one end of the sleeve is used for sleeving with a rotor shaft, and the other end is inserted into the positioning hole of the tooling seat in a matched mode. The assembling device can automatically pick the stator, improves the assembling efficiency and reduces the operation intensity of personnel; meanwhile, the application further provides an assembling method for efficiently assembling the permanent magnet motor stator and rotor by using the assembling device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of assembling equipment, in particular to a permanent magnet motor stator and rotor assembling device and method. BACKGROUND

[0002] It is known that the motor is an electromagnetic device for mutual conversion of electric energy and mechanical energy by using magnetic field as medium. In order to establish the air gap magnetic field for the motor energy conversion, there are two methods. One is to generate magnetic field by passing excitation current in the motor winding, and this kind of electrically excited motor needs external energy to maintain the current flow. The other is to generate magnetic field by using new type of rare earth permanent magnet. Due to the inherent characteristics of permanent magnet, it can establish the required magnetic field for energy conversion without additional energy after pre-magnetization. This structure can simplify the motor and save energy, and is widely used in new energy vehicles. Although the permanent magnet motor has many advantages, it also brings difficulties in assembly. Since the magnetic energy product of the rare earth permanent magnet material after magnetization can reach a very high value, the permanent magnet motor rotor has strong magnetism. When the stator and rotor are assembled, they will be attracted to each other, and the stator is easy to rub against the rotor, thereby damaging the stator enameled wire insulation, and also causing problems such as assembly danger and workpiece quality hidden trouble. Therefore, during the assembly of the permanent magnet motor stator and rotor, the shaft center of the rotor shaft and the hole center of the stator center hole need to be aligned, and then the stator and rotor are pressed and assembled.

[0003] In order to ensure that the shaft center of the rotor shaft and the hole center of the stator center hole are aligned during the assembly of the motor stator and rotor, and realize the rotational connection of the stator and the rotor. The existing assembly method is: manually lift the motor stator, or use a cable to tie the stator and then use a lifting device to lift the stator, and place the stator above the rotor. Then, manually align the hole center of the stator center hole and the shaft center of the rotor shaft with the naked eye, and then press the stator by hand to make the rotor housing cover the outside of the stator body, thereby completing the assembly of the motor stator and rotor.

[0004] The above assembly method can complete the assembly of the motor stator and rotor, but since there is no special part on the stator for connecting the lifting device, the method of using a cable to tie the stator cannot realize automatic picking of the stator, which is not conducive to the realization of automatic operation, and the efficiency is low. At the same time, manually aligning the hole center of the stator center hole and the shaft center of the rotor shaft with the naked eye is time-consuming and difficult, and requires high skill of personnel operation. Moreover, under the influence of strong magnetic field, it is very laborious to press the stator by hand to make the rotor housing cover the outside of the stator body.

[0005] In order to solve the problems in the prior art, especially the automatic picking of the stator during the assembly process, it has been a technical problem to be solved by those skilled in the art. SUMMARY

[0006] The present application solves the problem of overcoming at least one defect in the prior art, providing a permanent magnet motor stator and rotor assembly device that can automatically pick up the stator during the assembly process, improving assembly efficiency and reducing the intensity of personnel work.

[0007] To solve the above problems, the present application provides a permanent magnet motor stator and rotor assembly device, comprising a rack and a support frame mounted on the rack, a press is mounted on the support frame, a placing table is placed below the press, the placing table is used to place the rotor, the press is used to lift the stator and press the stator and the rotor assembly; It also includes a tooling assembly and a picking mechanism, the picking mechanism is installed at the lower end of the press, the tooling assembly includes a tooling seat and a sleeve, and the middle part of the tooling seat is provided with a positioning hole corresponding to the center hole of the stator; The tooling seat is placed below the picking mechanism for connection with the stator and picking by the picking mechanism; One end of the sleeve is used to connect with the rotor shaft, and the other end is inserted into the positioning hole of the tooling seat, and the inner hole wall of the positioning hole and the outer tube wall of the sleeve are tightly matched to assist the alignment of the shaft center of the rotor shaft and the hole center of the stator center hole.

[0008] The present application has the advantages compared with the prior art: the present application uses the picking mechanism and the tooling seat of the tooling assembly to realize the purpose of automatically picking up the stator by machine, so as to replace the manual lifting of the stator and the manual binding of the stator operation, which not only reduces the intensity of personnel work, but also improves the work efficiency; At the same time, the sleeve of the tooling assembly and the positioning hole of the tooling seat are inserted and matched, which can assist the alignment of the shaft center of the rotor shaft and the hole center of the stator center hole, compared with the operation of aligning the two centers by naked eye in the prior art, the present application is more convenient and efficient; In addition, the present application uses the mechanical assembly method of press output end to drive the stator and rotor to press and assemble, compared with the operation method of pressing the stator by hand to realize the press and assembly of the stator and the rotor in the prior art, the present application uses mechanical press and assembly, which can not only reduce the intensity of personnel work, but also improve the assembly efficiency.

[0009] As an improvement, the pickup mechanism comprises a connecting plate, a driving member, and a first clamping part and a second clamping part suspended at the bottom of the connecting plate; the connecting plate is fixedly connected to the lower pressing output end of the pressing machine, the body of the driving member is fixedly connected to the first clamping part and the output end of the driving member is fixedly connected to the second clamping part; at least one of the first clamping part and the second clamping part is slidingly connected to the connecting plate, and the clamping and release of the tool holder are achieved by the relative approach and relative departure of the first clamping part and the second clamping part. After the structure is applied, the relative approach and relative departure of the first clamping part and the second clamping part are controlled by the extension and retraction of the output end of the driving member, and then the clamping and release of the tool holder are achieved by the change of the relative position of the first clamping part and the second clamping part. The pickup mechanism can imitate the flexible pickup and release of the tool holder by the clamping jaw structure formed by the first clamping part and the second clamping part. Not only is the structure simple and easy to implement, but also the pickup efficiency is high. In addition, when the first clamping part and the second clamping part are both slidingly connected to the connecting plate, the synchronous movement of the tool holder picked up by the pickup mechanism can be achieved by simultaneously sliding the first clamping part and the second clamping part in the same direction. Thus, the center alignment of the hole center of the positioning hole and the tube center of the sleeve can be achieved by moving the tool holder. In this way, the placement positions of the tool holder and the placement table on the rack can be more flexible, thereby reducing the requirement for the placement position accuracy of the two.

[0010] As an improvement, the support frame is provided with a first conveying mechanism; the first conveying mechanism is located below the pickup mechanism and is used for conveying the tool holder to the pickup mechanism. After the structure is applied, the automatic conveying of the tool holder and the stator connected to the tool holder by the first conveying mechanism can realize the automatic assembly of the stator and the rotor of the permanent magnet motor in cooperation with the automatic pickup of the pickup mechanism, which is beneficial to the assembly line operation.

[0011] As an improvement, the first conveying mechanism comprises a rodless cylinder and a sliding plate fixedly connected to the rodless cylinder; the rodless cylinder is horizontally arranged on the support frame and extends to the area below the pickup mechanism, and is used for driving the sliding plate to slide into and out of the area below the pickup mechanism; the sliding plate is slidingly arranged on the support frame and is used for placing the tool holder. After the mechanism is applied, the sliding plate is driven by the rodless cylinder to slide into and out of the area below the pickup mechanism, which not only meets the requirement of conveying the tool holder to the pickup mechanism for pickup by the pickup mechanism, but also realizes that after the sliding plate slides out of the area below the pickup mechanism, it does not hinder the subsequent pressing and driving assembly operation of the stator and the rotor.

[0012] As an improvement, the rack is provided with a conveying frame, the conveying frame is located between the rack and the supporting frame, and the conveying frame is provided with a second conveying mechanism and a retractable blocking piece; the conveying track of the second conveying mechanism extends to the lower area of the press, and is used for placing and conveying the placing table; the retractable end of the retractable blocking piece extends into the conveying track of the second conveying mechanism, and is used for blocking the placing table in the conveying process and making the placing table stationary at the lower area of the press. After the structure is applied, the placing table and the rotor placed on the placing table are conveyed by the second conveying mechanism, the retractable end of the retractable blocking piece is extended to block the placing table in the conveying process and make the placing table stationary at the lower area of the press, so that the press is driven to press down to drive the stator hoisted at the press lower end to move downward to complete the pressing assembly with the rotor placed on the placing table; when the stator and the rotor are assembled, the retractable end of the retractable blocking piece is retracted to move the placing table, so that the placing table continues to be conveyed on the conveying track of the second conveying mechanism. In the structure, the second conveying mechanism and the retractable blocking piece are provided, the purpose of automatic feeding to the lower area of the press is achieved, the flow line operation is facilitated, and the operation efficiency can be greatly improved.

[0013] As an improvement, the second conveying mechanism includes two parallel chain assembly components, and a servo motor used for driving the chain assembly components to transmit power; the placing table is placed on the chain assembly components. The structure not only can achieve the purpose of automatic feeding to the lower area of the press, but also can facilitate taking the placing table from the conveying track of the second conveying mechanism by using the gap between the two chain assembly components. The placing table can be taken in various ways, including but not limited to the following: the placing table is taken from the side, the placing table is taken from the bottom, and the placing table is taken from above.

[0014] As an improvement, the top of the rack is provided with a lifting mechanism, the lifting mechanism is located below the press and between the two chain assembly components; the highest point and the lowest point of the lifting mechanism are located above and below the chain assembly components, respectively, and are used for lifting the placing table placed on the chain assembly components upward to separate from the chain assembly components. After the structure is applied, when the press is driven to press down to drive the stator to press and assemble with the rotor placed on the placing table, the lifting mechanism not only can effectively buffer the downward pressure output by the press to protect the stator and the rotor, but also can avoid the chain assembly components being damaged by the downward pressure output by the press by extending and lifting the output end of the lifting mechanism to lift the placing table upward to separate from the chain assembly components. In addition, when the stator and the rotor are assembled, the lifting mechanism drives the placing table to descend synchronously and is placed on the chain assembly components by extending and descending the output end of the lifting mechanism, and the lifting mechanism can be separated from the placing table by continuously extending and descending the output end of the lifting mechanism. Under the cooperation of the retractable end of the retractable blocking piece being retracted, the placing table can continue to be conveyed on the chain assembly components.

[0015] As an improvement, the lifting mechanism comprises a lifting cylinder vertically arranged at the top of the rack and a top plate connected to the output end of the lifting cylinder. The lifting mechanism composed of the lifting cylinder and the top plate not only has simple structure, low cost and easy implementation, but also can increase the contact area between the output end of the lifting cylinder and the bottom of the placing table by using the top plate. When the press drives the stator to be pressed and assembled with the rotor placed on the placing table, the supporting structure composed of the lifting cylinder and the top plate can provide good support to the placing table.

[0016] As an improvement, the top of the rack is provided with a plurality of vertical columns arranged at intervals along the conveying direction of the chain assembly. The vertical columns are arranged on the outside of the conveying rack, and the top of the vertical column is provided with a limiting protrusion. The limiting protrusion is located above the chain assembly and extends from the body of the vertical column to the inside of the conveying rack, and is used to block the placing table from rising in the vertical direction and to block the placing table between the limiting protrusion and the top plate when the top plate rises to the highest point. After the application of this structure, when the lifting cylinder drives the top plate to lift the placing table upward, the limiting protrusion on the vertical column can limit the upward movement of the placing table in the vertical direction and tightly block the placing table between the limiting protrusion and the top plate. Therefore, when the press drives the stator to be pressed and assembled with the rotor placed on the placing table, the problem of displacement of the placing table under the pressure of the press can be effectively solved.

[0017] The application also provides an assembly method for assembling the stator and rotor of a permanent magnet motor based on the assembly device.

[0018] Step A: install the tool holder on the stator to ensure that the hole center of the positioning hole is coaxial with the hole center of the stator center hole;

[0019] Step B: place the tool holder together with the stator connected thereto on the first conveying mechanism and convey it to the pickup station of the pickup mechanism by the first conveying mechanism for pickup by the pickup mechanism. When the tool holder is placed, ensure that the tool holder is placed on the top of the stator;

[0020] Step C: the pickup mechanism picks up the tool holder from the first conveying mechanism, and hangs the picked tool holder together with the stator connected thereto on the pressing end of the press for assembly with the sleeve and the rotor connected to the sleeve;

[0021] Step D: place the placing table on the chain assembly of the second conveying mechanism, place the rotor on the placing table, and sleeve the sleeve on the rotor shaft from one side of the top of the rotor;

[0022] Step E: convey the placing table together with the sleeve placed on the placing table and the rotor connected to the sleeve by the chain assembly; when the placing table is conveyed to the lower side of the press, the placing table in the conveying process is blocked by the retractable blocking piece and is stationary at the lower side of the press.

[0023] Step F: when the placing table is stationary and parked below the press, the placing table is lifted up by the lifting cylinder driving the top plate to disengage from the chain assembly, so that the sleeve placed on the placing table and the rotor connected to the sleeve can be assembled above the chain assembly corresponding to the tool holder and the stator connected to the tool holder;

[0024] Step G: when the work of steps A-F is completed, the tool holder is driven to descend by the press lower end, and the sleeve assembled with the tool holder is placed on the placing table, and at the same time, the stator connected to the tool holder is synchronously lowered and assembled with the rotor connected to the sleeve;

[0025] Step H: when the tool holder and the sleeve are assembled, the pickup part of the pickup mechanism releases the tool holder, so that the assembled tool holder and sleeve and the stator and rotor can be freely moved as a whole;

[0026] Step I: after the pickup part of the pickup mechanism releases the tool holder, the lifting cylinder driving the top plate is lowered and the placing table lifted up by the top plate is synchronously lowered, and when the placing table is placed on the chain assembly, the top plate continues to descend and is out of contact with the placing table, the telescopic end of the telescopic stopper is retracted, and the assembled tool holder and sleeve and the stator and rotor of the motor are transported to the designated position for processing by the chain assembly.

[0027] Compared with the prior art, the assembly method of the application has the advantages that the automatic assembly of the permanent magnet motor stator and rotor can be realized, the assembly efficiency is high, and the assembly method is suitable for assembly line mechanical operation. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of the application;

[0029] Figure 2 is a first auxiliary perspective view of the application;

[0030] Figure 3 is a second auxiliary perspective view of the application;

[0031] Figure 4 is a third auxiliary perspective view of the application;

[0032] Figure 5 is a fourth auxiliary perspective view of the application;

[0033] Figure 6 is Figure 5 is an enlarged view of A in the middle.

[0034] BRIEF DESCRIPTION OF DRAWINGS:

[0035] 1, rack; 11, support frame; 12, conveying frame; 2, press; 3, placing table; 31, arc-shaped limiting block; 32, circular limiting area; 4, tooling assembly; 41, tooling seat; 410, positioning hole; 42, sleeve; 5, picking mechanism; 51, first clamping part; 52, second clamping part; 53, connecting plate; 54, driving piece; 6, first conveying mechanism; 61, rodless cylinder; 62, sliding plate; 7, second conveying mechanism; 70, telescopic blocking piece; 71, chain assembly; 72, servo motor; 8, lifting mechanism; 81, lifting cylinder; 82, top plate; 9, stand; 90, limiting protrusion. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0037] Embodiment one:

[0038] As shown in Figure 1 and Figure 4 , in this embodiment, the permanent magnet motor stator and rotor assembly device comprises a rack 1 and a support frame 11 mounted on the rack 1, a press 2 is mounted on the support frame 11, a placing table 3 is placed below the press 2, the placing table 3 is used to place the rotor, the press 2 is used to hoist the stator and press down the stator and the rotor assembly; it also comprises a tooling assembly 4 and a picking mechanism 5, the picking mechanism 5 is installed at the lower end of the press 2, the tooling assembly 4 comprises a tooling seat 41 and a sleeve 42, and the middle part of the tooling seat 41 is provided with a positioning hole 410 corresponding to the center hole of the stator; the tooling seat 41 is placed below the picking mechanism 5, used to connect with the stator and picked up by the picking mechanism 5; one end of the sleeve 42 is used to sleeve with the rotor shaft, and the other end is inserted into the positioning hole 410 of the tooling seat 41, and the inner hole wall of the positioning hole 410 and the outer tube wall of the sleeve 42 are tightly matched to assist the alignment of the shaft center of the rotor shaft and the hole center of the stator center hole.

[0039] Compared with the prior art, the present application has the advantages that: the present application uses the pickup mechanism 5 and the tool seat 41 of the tool assembly 4 to cooperate, realizes the purpose of automatically picking up the stator by the machine, so as to replace the manual lifting of the stator and the manual binding operation of the stator, which not only reduces the labor intensity, but also improves the work efficiency; at the same time, the sleeve 42 of the tool assembly 4 is inserted and matched with the positioning hole 410 of the tool seat 41, which can assist to realize the assembly effect that the shaft center of the rotor shaft and the hole center of the stator center hole are concentrically aligned, compared with the operation of aligning the two centers by the naked eye in the prior art, the present application is more convenient to operate and has higher work efficiency; in addition, the present application uses the mechanical assembly mode of the output end of the pressing machine 2 to drive the stator and the rotor to press and assemble, compared with the operation mode of pressing and assembling the stator and the rotor by manually pressing the stator in the prior art, the present application uses mechanical pressing and assembly, which can not only reduce the labor intensity, but also improve the assembly efficiency.

[0040] Further, as shown in Figure 5 and Figure 6 , the top surface of the placing table 3 is circumferentially provided with a plurality of arc-shaped limiting blocks 31, and the arc-shaped limiting blocks 31 are circumferentially arranged to form a circular limiting area 32; the arc-shaped limiting blocks 31 are used to cooperate with the rotor to limit the coincidence of the tube center of the sleeve 42 and the center of the circular limiting area 32.

[0041] As shown in Figure 1 and Figure 2As shown, the pickup mechanism 5 comprises a connecting plate 53, a driving member 54, and a first clamping part 51 and a second clamping part 52 suspended at the bottom of the connecting plate 53; the connecting plate 53 is fixedly connected at the lower pressing output end of the pressing machine 2, the body of the driving member 54 is fixedly connected with the first clamping part 51 and the output end of the driving member 54 is fixedly connected with the second clamping part 52; at least one of the first clamping part 51 and the second clamping part 52 is slidingly connected with the connecting plate 53, and the clamping and unclamping of the tool holder 41 is realized by the relative approaching and relative distancing of the first clamping part 51 and the second clamping part 52. The driving member 54 can be a pneumatic cylinder or an oil cylinder, which controls the relative approaching or relative distancing of the first clamping part 51 and the second clamping part 52 through the extension and retraction of the output end. After the application of this structure, the relative approaching and relative distancing of the first clamping part 51 and the second clamping part 52 is controlled by the extension and retraction of the output end of the driving member 54, and then the clamping and unclamping of the tool holder 41 is realized by the change of the relative position of the first clamping part 51 and the second clamping part 52. The pickup mechanism 5 can imitate the flexible pickup and unclamping of the tool holder 41 by the clamping jaw structure formed by the first clamping part 51 and the second clamping part 52, which not only has a simple structure and is easy to realize, but also has a high pickup efficiency. In addition, when the first clamping part 51 and the second clamping part 52 are both slidingly connected with the connecting plate 53, the synchronous movement of the tool holder 41 picked up by the pickup mechanism 5 can be realized by simultaneously sliding the first clamping part 51 and the second clamping part 52 in the same direction, so that the center alignment of the hole center of the positioning hole 410 and the tube center of the sleeve 42 can be realized by moving the tool holder 41. In this way, the placement positions of the tool holder 41 and the placement table 3 on the rack 1 can be more flexible, thereby reducing the requirement for the placement position accuracy of the two.

[0042] As shown in Figure 1 and Figure 2 , the support frame 11 is provided with a first conveying mechanism 6; the first conveying mechanism 6 is located below the pickup mechanism 5 and is used for conveying the tool holder 41 to the pickup mechanism 5. After the application of this structure, the automatic conveying of the tool holder 41 and the stator connected to the tool holder 41 by the first conveying mechanism 6, combined with the automatic pickup of the pickup mechanism 5, can realize the automatic assembly of the stator and the rotor of the permanent magnet motor, which is conducive to the assembly line operation.

[0043] As shown in Figure 1 and Figure 2The first conveying mechanism 6 includes a rodless cylinder 61 and a sliding plate 62 fixedly connected with the rodless cylinder 61. The rodless cylinder 61 is horizontally arranged on the support frame 11 and extends to the lower area of the pickup mechanism 5, and is used to drive the sliding plate 62 to slide into and out of the lower area of the pickup mechanism 5. The sliding plate 62 is slidingly arranged on the support frame 11 and is used to place the tool holder 41. After the sliding plate 62 is driven by the rodless cylinder 61 to slide into and out of the lower area of the pickup mechanism 5, the tool holder 41 can be conveyed to the pickup mechanism 5 for pickup, and the sliding plate 62 can slide out of the lower area of the pickup mechanism 5 without affecting the subsequent pressing assembly operation of the stator and the rotor driven by the pressing machine 2.

[0044] As shown in Figure 1 and Figure 3 , the transmission frame 12 is arranged on the rack 1 and located between the rack 1 and the support frame 11. The second conveying mechanism 7 and the telescopic blocking piece 70 are arranged on the transmission frame 12. The conveying track of the second conveying mechanism 7 extends to the lower area of the pressing machine 2 and is used to place and convey the placement table 3. The telescopic end of the telescopic blocking piece 70 extends into the conveying track of the second conveying mechanism 7 and is used to block the placement table 3 in the conveying process and make the placement table 3 stationary in the lower area of the pressing machine 2. The telescopic blocking piece 70 can be a cylinder or an oil cylinder arranged on a telescopic frame. The output end of the cylinder or the oil cylinder extends into the conveying track of the second conveying mechanism 7. The cylinder or the oil cylinder is controlled to extend or retract to block and release the placement table 3 in the conveying track of the second conveying mechanism 7. After the application of the structure, the placement table 3 and the rotor placed on the placement table 3 are conveyed by the second conveying mechanism 7. The telescopic end of the telescopic blocking piece 70 extends to block the placement table 3 in the conveying process and make the placement table 3 stationary in the lower area of the pressing machine 2, so that the stator suspended on the lower end of the pressing machine 2 is driven to move downward and is pressed and assembled with the rotor placed on the placement table 3. After the stator and the rotor are assembled, the telescopic end of the telescopic blocking piece 70 is retracted to release the placement table 3, so that the placement table 3 continues to be conveyed on the conveying track of the second conveying mechanism 7. In the structure, the second conveying mechanism 7 and the telescopic blocking piece 70 are arranged to realize the purpose of automatic feeding to the lower area of the pressing machine 2, which is beneficial to the assembly line operation and can greatly improve the work efficiency.

[0045] As shown in Figure 1 and Figure 3As shown, the second conveying mechanism 7 comprises two parallel chain assemblies 71 and a servo motor 72 for driving the chain assemblies 71; the placement table 3 is placed on the chain assemblies 71. This structure not only realizes the purpose of automatic feeding to the lower area of the press 2, but also facilitates the removal of the placement table 3 from the conveying track of the second conveying mechanism 7 by using the gap between the two chain assemblies 71. The removal of the placement table 3 can be achieved in various ways, including but not limited to the following: lifting the placement table 3 from the side, lifting the placement table 3 from the bottom, and clamping the placement table 3 from above.

[0046] As shown in Figure 4 and Figure 5 , the top of the rack 1 is provided with a lifting mechanism 8, which is located below the press 2 and between the two chain assemblies 71; the highest and lowest points of the lifting mechanism 8 are located above and below the chain assemblies 71, respectively, and are used to lift the placement table 3 placed on the chain assemblies 71 upward to disengage from the chain assemblies 71. After applying this structure, when the press 2 drives the stator to press and assemble with the rotor placed on the placement table 3, the lifting mechanism 8 not only effectively buffers the downward force output by the press 2, but also protects the stator and rotor. At the same time, by extending the output end of the lifting mechanism 8 upward, the placement table 3 is lifted out of the chain assemblies 71, which can also avoid the chain assemblies 71 being damaged by the downward force output by the press 2. In addition, after the stator and rotor are assembled, the lifting mechanism 8 drives the placement table 3 to descend synchronously and be placed on the chain assemblies 71 by extending the output end downward. At this time, the lifting mechanism 8 can be separated from the placement table 3 by continuously extending the output end downward, and under the cooperation of the retractable stopper 70, the placement table 3 can continue to be transported on the chain assemblies 71.

[0047] As shown in Figure 4 and Figure 5 , the lifting mechanism 8 comprises a lifting cylinder 81 vertically arranged on the top of the rack 1 and a top plate 82 connected to the output end of the lifting cylinder 81. The lifting mechanism 8 composed of the lifting cylinder 81 and the top plate 82 not only has a simple structure, low cost and easy implementation, but also can increase the contact area between the output end of the lifting cylinder 81 and the bottom of the placement table 3 by using the top plate 82. When the press 2 drives the stator to press and assemble with the rotor placed on the placement table 3, the support structure composed of the lifting cylinder 81 and the top plate 82 can provide good support for the placement table 3.

[0048] As shown in Figure 4 and Figure 5As shown, the top of the rack 1 is provided with a plurality of upright columns 9 arranged at intervals along the conveying direction of the chain assembly 71, the upright columns 9 are arranged on the outer side of the transmission frame 12, and the top of the upright column 9 is provided with a limiting protrusion 90; the limiting protrusion 90 is located above the chain assembly 71 and extends from the body of the upright column 9 to the inner side of the transmission frame 12, and is used to block the placement table 3 from rising in the vertical direction and to only clamp the placement table 3 between the limiting protrusion 90 and the top plate 82 when the top plate 82 rises to the highest point. After the application of this structure, when the lifting cylinder 81 drives the top plate 82 to lift the placement table 3 upward, the limiting protrusion 90 on the upright column 9 can limit the upward movement of the placement table 3 in the vertical direction and tightly clamp the placement table 3 between the limiting protrusion 90 and the top plate 82, thereby effectively solving the problem of displacement of the placement table 3 under the pressing force of the press 2 when the press 2 drives the stator and the rotor placed on the placement table 3 to press and assemble.

[0049] Embodiment Two:

[0050] This embodiment is based on the assembly device in Embodiment One, and is an assembly method for assembling the stator and rotor of a permanent magnet motor based on the assembly device in Embodiment One, comprising the following steps:

[0051] Step A: Install the tool holder 41 to the stator, and ensure that the hole center of the positioning hole 410 is coaxial with the hole center of the stator center hole;

[0052] Step B: Place the tool holder 41 together with the stator connected to the tool holder 41 on the first conveying mechanism 6 and convey it to the pickup station of the pickup mechanism 5 through the first conveying mechanism 6, in preparation for being picked up by the pickup mechanism 5; when placed, ensure that the tool holder 41 is placed on the top of the stator;

[0053] Step C: The pickup mechanism 5 picks up the tool holder 41 from the first conveying mechanism 6, and hangs the picked-up tool holder 41 together with the stator connected to the tool holder 41 on the lower pressing end of the press 2, in preparation for assembly with the sleeve 42 and the rotor connected to the sleeve 42;

[0054] Step D: Place the placement table 3 on the chain assembly 71 of the second conveying mechanism 7, place the rotor on the placement table 3, and sleeve the sleeve 42 on the rotor shaft from one side of the top of the rotor;

[0055] Step E: Convey the placement table 3 through the chain assembly 71, and convey the sleeve 42 placed on the placement table 3 together with the rotor connected to the sleeve 42; when the placement table 3 is conveyed to the lower side of the press 2, stop the placement table 3 in the conveying process through the telescopic stop piece 70 and make the placement table 3 stationary at the lower side of the press 2;

[0056] Step F: when the placing table 3 is stationary and placed under the lower end of the press 2, the placing table 3 stationary placed on the chain assembly 71 is lifted up by the lifting cylinder 81 driving the top plate 82 to be lifted up and separated from the chain assembly 71, so as to be placed on the sleeve 42 and the rotor connected to the sleeve 42 above the chain assembly 71 and the tool holder 41 and the stator connected to the tool holder 41 are correspondingly assembled;

[0057] Step G: when the work of steps A-F is completed, the tool holder 41 suspended on the lower end of the press 2 is driven to be lowered by the lower end of the press 2, and is assembled with the sleeve 42 placed on the placing table 3, and at the same time, the stator connected to the tool holder 41 is synchronously lowered and assembled with the rotor connected to the sleeve 42;

[0058] Step H: when the tool holder 41 and the sleeve 42 are assembled, the pickup part of the pickup mechanism 5 releases the tool holder 41, so that the assembled tool holder 41 and the sleeve 42 and the stator and the rotor can be freely moved as a whole;

[0059] Step I: after the pickup part of the pickup mechanism 5 releases the tool holder 41, the lifting cylinder 81 drives the top plate 82 to be lowered and synchronously lowers the placing table 3 lifted up by the top plate 82, when the placing table 3 is placed on the chain assembly 71, the top plate 82 continues to be lowered and is separated from the placing table 3, the telescopic end of the telescopic stop piece 70 is retracted, and the tool holder 41 and the sleeve 42 and the stator and the rotor of the motor assembled on the placing table 3 are transported to the designated position for processing by the chain assembly 71.

[0060] Compared with the prior art, the assembly method has the advantages that the automatic assembly of the stator and the rotor of the permanent magnet motor can be realized, the assembly efficiency is high, and the assembly method is suitable for assembly line mechanical operation.

[0061] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of the present disclosure.

Claims

1. A permanent magnet motor stator and rotor assembly device, comprising a rack (1) and a support frame (11) mounted on the rack (1), a press (2) is mounted on the support frame (11), a placing table (3) is placed below the press (2), the placing table (3) is used for placing a rotor, the press (2) is used for hoisting a stator and pressing the stator and the rotor assembly; characterized in that: The tooling assembly (4) and the pickup mechanism (5) are also included, the pickup mechanism (5) is installed at the lower pressing output end of the press (2), the tooling assembly (4) includes a tooling seat (41) and a sleeve (42), and the middle part of the tooling seat (41) is provided with a positioning hole (410) corresponding to the center hole of the stator; the tooling seat (41) is placed below the pickup mechanism (5) and is used for connecting with the stator and being picked up by the pickup mechanism (5); one end of the sleeve (42) is used for sleeving with the rotor shaft, and the other end is inserted into the positioning hole (410) of the tooling seat (41) and is matched with the inner hole wall of the positioning hole (410) and the outer tube wall of the sleeve (42) to assist the center alignment of the shaft center of the rotor shaft and the hole center of the stator center hole; the pickup mechanism (5) includes a connecting plate (53), a driving member (54), and a first clamping part (51) and a second clamping part (52) hung at the bottom of the connecting plate (53); the connecting plate (53) is fixedly connected to the lower pressing output end of the press (2), the body of the driving member (54) is fixedly connected with the first clamping part (51), and the output end of the driving member (54) is fixedly connected with the second clamping part (52), and the first clamping part (51) and the second clamping part (52) are relatively close and relatively far away to realize clamping and releasing of the tooling seat (41); the first clamping part (51) and the second clamping part (52) are both slidingly connected with the connecting plate (53), when the first clamping part (51) and the second clamping part (52) are both slidingly connected with the connecting plate (53), the first clamping part (51) and the second clamping part (52) are simultaneously slid in the same direction to realize synchronous movement of the tooling seat (41) picked up by the pickup mechanism (5); the first conveying mechanism (6) is arranged on the support frame (11); the first conveying mechanism (6) is located below the pickup mechanism (5) and is used for conveying the tooling seat (41) to the pickup mechanism (5); the transmission frame (12) is arranged on the rack (1), the transmission frame (12) is located between the rack (1) and the support frame (11), and the second conveying mechanism (7) and the telescopic blocking piece (70) are arranged on the transmission frame (12); the conveying track of the second conveying mechanism (7) extends to the area below the press (2) and is used for placing and conveying the placement table (3); the telescopic end of the telescopic blocking piece (70) extends into the conveying track of the second conveying mechanism (7) and is used for blocking the placement table (3) in the conveying process and making the placement table (3) stationary in the area below the press (2); the second conveying mechanism (7) includes two parallel chain assembly components (71) and a servo motor (72) used for driving the chain assembly components (71); the placement table (3) is placed on the chain assembly components (71).The top of the frame (1) is provided with a lifting mechanism (8), which is located below the press (2) and between the two chain assemblies (71); the highest and lowest points of the lifting mechanism (8) are located above and below the chain assemblies (71) respectively, and are used to lift the placing table (3) parked on the chain assemblies (71) upwards to separate from the chain assemblies (71). ​ 2. The permanent magnet motor stator and rotor assembly apparatus of claim 1, wherein: The first conveying mechanism (6) comprises a rodless cylinder (61) and a sliding plate (62) fixedly connected with the rodless cylinder (61); the rodless cylinder (61) is horizontally arranged on the support frame (11) and extends to the lower area of the pickup mechanism (5), and is used for driving the sliding plate (62) to slide into and out of the lower area of the pickup mechanism (5); the sliding plate (62) is slidingly arranged on the support frame (11) and is used for placing the tool seat (41).

3. The permanent magnet motor stator and rotor assembly apparatus of claim 1, wherein: The lifting mechanism (8) comprises a lifting cylinder (81) vertically arranged on the top of the rack (1) and a top plate (82) connected to the output end of the lifting cylinder (81).

4. The permanent magnet motor stator and rotor assembly apparatus of claim 3, wherein: The top of the rack (1) is provided with a plurality of vertical columns (9) which are arranged at intervals along the conveying direction of the chain assembly (71); the vertical columns (9) are arranged on the outer side of the transmission frame (12), and the top of the vertical column (9) is provided with a limiting protrusion (90); the limiting protrusion (90) is located above the chain assembly (71) and extends from the body of the vertical column (9) to the inner side of the transmission frame (12), and is used for blocking the placement table (3) from rising in the vertical direction and for clamping the placement table (3) between the limiting protrusion (90) and the top plate (82) when the top plate (82) rises to the highest point.

5. A method for assembling a permanent magnet motor stator and rotor based on the permanent magnet motor stator and rotor assembling device of claim 4, characterized in that: The method comprises the following steps: Step A: install the tool seat (41) on the stator, and ensure that the center of the positioning hole (410) is coaxial with the center of the stator center hole; Step B: place the tool seat (41) together with the stator connected thereto on the first conveying mechanism (6) and convey the tool seat (41) to the pickup station of the pickup mechanism (5) by the first conveying mechanism (6) for pickup by the pickup mechanism (5); when placed, the tool seat (41) is placed on the top of the stator; Step C: the pickup mechanism (5) picks up the tool seat (41) from the first conveying mechanism (6), and hangs the picked-up tool seat (41) together with the stator connected thereto on the lower pressing end of the press (2) for assembly with the sleeve (42) and the rotor connected to the sleeve (42); Step D: place the placement table (3) on the chain assembly (71) of the second conveying mechanism (7), place the rotor on the placement table (3), and sleeve the sleeve (42) on the rotor shaft from one side of the top of the rotor; Step E: convey the placement table (3) by the chain assembly (71), and convey the sleeve (42) placed on the placement table (3) and the rotor connected to the sleeve (42) together; when the placement table (3) is conveyed to the lower side of the press (2), the placement table (3) in the conveying process is blocked by the retractable blocking piece (70) and is stationary on the lower side of the press (2). Step F: when the placing table (3) is stationary placed under the press (2), the top plate (82) is driven to rise by the lifting cylinder (81) to lift up the placing table (3) stationary placed on the chain assembly (71) to separate from the chain assembly (71), so as to place the sleeve (42) on the placing table (3) and the rotor connected to the sleeve (42) above the chain assembly (71) to complete the assembly with the tool holder (41) and the stator connected to the tool holder (41); Step G: when the work of steps A-F is completed, the tool holder (41) suspended at the lower end of the press (2) is driven to descend by the lower end of the press (2) to assemble with the sleeve (42) placed on the placing table (3), and at the same time, the stator connected to the tool holder (41) is synchronously lowered to complete the assembly with the rotor connected to the sleeve (42); Step H: when the tool holder (41) and the sleeve (42) are assembled, the pickup part of the pickup mechanism (5) releases the tool holder (41), so that the assembled tool holder (41) and sleeve (42) and stator and rotor can be freely moved as a whole assembly; Step I: after the pickup part of the pickup mechanism (5) releases the tool holder (41), the lifting cylinder (81) drives the top plate (82) to descend and synchronously lower the placing table (3) lifted up by the top plate (82), when the placing table (3) is placed on the chain assembly (71), the top plate (82) continues to descend and separates from the placing table (3), the retractable stop piece (70) retracts, and the tool holder (41) and the sleeve (42) and the stator and rotor of the motor placed on the placing table (3) and completed assembly are transported to the designated position for processing by the chain assembly (71).

Images