An electric vehicle motor assembly production line and assembly method

Abstract

The present application relates to electric motor assembly technology field, especially a kind of electric motor assembly production line and assembly method, assembly production line includes the rotator feeding mechanism, hub cover feeding mechanism, hub cover glue mechanism, hub cover nailing mechanism, turnover mechanism, end cover feeding mechanism, bearing press mechanism, end cover nailing mechanism, identification mechanism, oil seal press mechanism, electric detection mechanism, end jump detection mechanism and lower piece mechanism in turn, and motor tool and transmission line, the motor tool is supported to be assembled and the motor of assembly completion, and moves to mechanism position on transmission line in turn.This application designs the automatic wheel motor assembly production line, makes all processes except stator feeding installation, motor electric detection wiring to complete automatic assembly and process connection, substantially reduces the degree of participation of manual, improves the automation efficiency of assembly production line, improves product assembly precision and stability, reduces the equipment cost, time cost and labor cost of assembly.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle motor assembly technology, and in particular to an electric vehicle motor assembly production line and assembly method. Background Technology

[0002] As the core drive component of electric vehicles, the assembly precision of each component directly affects the motor's operating efficiency, noise level, and service life. Currently, the assembly process of electric vehicle wheel motors in existing technologies is still mainly done manually: operators need to manually complete the loading, positioning, and assembly of rotors, end covers, hub covers, and stators. Although some processes are assisted by simple tooling, the core assembly actions are still performed manually.

[0003] However, manual assembly has many insurmountable technical drawbacks: First, it is inefficient. Due to limitations in operator skill, labor intensity, and working hours, the assembly cycle for a single motor is long, which cannot meet the needs of mass production in the electric vehicle industry. Second, it suffers from poor assembly precision and stability. Manual operation makes it difficult to ensure the coaxiality, perpendicularity, and clearance fit of various components, resulting in vibration and noise during motor operation, reducing motor output efficiency and service life, and significantly affecting the consistency of motor performance. Third, it results in high production costs. Manual assembly requires a large number of skilled operators, and the training period for these personnel is long. With the increasing labor costs year by year, it is difficult to effectively control motor manufacturing costs. Fourth, it has poor adaptability. For different models and specifications of wheel motors, manual assembly requires re-familiarization with the assembly process and positioning benchmarks, resulting in low switching efficiency and making it difficult to adapt to the flexible production needs of multiple varieties and small batches.

[0004] Although some simple semi-automatic assembly tools (such as press machines and positioning fixtures) have emerged in the existing technology, they can only assist in completing partial operations of a single process and cannot achieve fully automated assembly. They still rely on manual processes for process connection and precision adjustment, and have not fundamentally solved the core problems of low efficiency, poor accuracy and high cost of manual assembly. Summary of the Invention

[0005] This invention aims to solve the above problems and provides an electric vehicle motor assembly production line and assembly method, the technical solution of which is as follows: An electric vehicle motor assembly production line includes, in sequence, a rotor feeding mechanism, a hub cover feeding mechanism, a hub cover gluing mechanism, a hub cover nailing mechanism, a flipping mechanism, an end cover feeding mechanism, a bearing pressing mechanism, an end cover nailing mechanism, a marking mechanism, an oil seal pressing mechanism, an electrical inspection preparation station, an electrical inspection mechanism, an end jump detection mechanism, and a part unloading mechanism, as well as motor tooling and a transmission line. The motor tooling carries motors to be assembled and those already assembled, and moves sequentially to the mechanism positions on the transmission line. The marking mechanism includes, in sequence, a labeling mechanism, an engraving mechanism, and an oiling mechanism.

[0006] Based on the above scheme, the rotor feeding mechanism includes a rotor positioning mechanism for detecting the circumferential position of the rotor and a conveying feeding mechanism; the rotor positioning mechanism includes a feeding frame and a rotor actuation assembly, a rotor hole-finding assembly and a positioning pin on it; the rotor actuation assembly includes a rotor rotary motor and a rotor rotary table, the rotor rotary motor drives the rotor rotary table to rotate in the horizontal plane, and the rotor to be positioned is carried on the rotor rotary table; the rotor hole-finding assembly includes a nozzle hole detection sensor for detecting the position of the nozzle hole on the rotor; the positioning pin is set below the rotor rotary table and moves in the vertical direction, and the positioning pin is inserted into the positioning hole of the rotor; the conveying feeding mechanism is set on the feeding frame and includes a feeding conveyor belt, a feeding tilting mechanism, a feeding positioning mechanism and a feeding robotic arm arranged in sequence, the feeding tilting mechanism includes a tilting cylinder for tilting the rotor on the feeding conveyor belt by 180°, the feeding robotic arm includes a rotor gripper for clamping the rotor, and the feeding robotic arm moves between the feeding positioning mechanism and the rotor positioning mechanism.

[0007] Preferably, the hub cover feeding mechanism includes a rotary table, a hub cover conveying device, a hub cover bearing feeding device, a hub cover bearing pressing device, an adhesive applicator, a vision component, and an output device. The hub cover bearing feeding device is located on one side of the rotary table, the hub cover bearing pressing device is located above the rotary table, the adhesive applicator is located on one side of the hub cover bearing pressing device, the vision component is located above the rotary table, and the output device is located on one side of the vision component.

[0008] Preferably, the bearing pressing mechanism includes a lifting mechanism, a support sleeve, a pressure mechanism, and a second pressing head. The lifting mechanism is located at the bottom of the pressing frame, and the support sleeve is correspondingly located below the first bearing and is driven by the lifting mechanism to move vertically. The pressure mechanism is located at the top of the pressing frame, and the second pressing head is correspondingly located above the second bearing and is driven by the pressure mechanism to move vertically. The second pressing head presses against the support sleeve, pressing and fixing the first bearing and the second bearing onto the main shaft. The support sleeve is correspondingly located to the inner ring of the first bearing, and the second pressing head is correspondingly located to the inner ring of the second bearing.

[0009] Based on the above scheme, the press frame is also provided with a pin-removing mechanism for removing the positioning pin. The pin-removing mechanism includes a second gripper, a gripper driving mechanism and a moving mechanism. Two second grippers are symmetrically arranged and form a clamping space between them to accommodate the positioning pin. The gripper driving mechanism drives the second grippers to move relative to each other. The moving mechanism is set on the press frame and drives the gripper driving mechanism to reciprocate in the vertical and horizontal directions.

[0010] Preferably, the hub cap nailing mechanism includes a hub cap nailing machine for installing connecting nails at the connection position between the hub cap and the rotor; the end cap nailing mechanism includes an end cap nailing machine for installing connecting nails at the connection position between the end cap and the rotor; both the hub cap nailing mechanism and the end cap nailing mechanism include a storage mechanism for recording the installation force of each connecting nail.

[0011] Preferably, the electrical inspection mechanism includes a motor electrical inspection station, which includes an electrical inspection station frame and an electrical inspection equipment box. A detection mechanism and a load mechanism are mounted on the electrical inspection station frame. The acceleration sensor slides along the axial direction of the motor to be inspected and abuts against the end of the motor shaft. The load mechanism is positioned above the motor to be inspected and slides along the height direction on the electrical inspection station frame. The load mechanism includes a load roller, the axis of which is parallel to the axis of the motor to be inspected, and the load roller abuts against the upper part of the motor to be inspected in the inspection state. The electrical inspection mechanism also includes a transmission mechanism, which, in addition to a transmission line, includes an electrical inspection conveyor line, an electrical inspection unloading line, and an electrical inspection return line. The motor electrical inspection station is located at the electrical inspection conveyor line. The motor fixture moves on the transmission mechanism, and the motor to be inspected is placed on the motor fixture. The motor fixture moves from the transmission line to the electrical inspection unloading line on the electrical inspection conveyor line and from the electrical inspection unloading line to the transmission line on the electrical inspection return line.

[0012] Preferably, the end jump detection mechanism includes an end jump detection frame and a first detection assembly; the first detection assembly includes a detection mechanism and a moving mechanism, the detection mechanism is correspondingly abutted against the radial end face of the motor to be tested for detecting end jump, the moving mechanism is disposed at the bottom of the detection mechanism and drives the detection mechanism to move in the horizontal direction; the detection mechanism of the end jump detection mechanism is configured as a displacement sensor; the end of the detection mechanism is provided with a protective structure, the protective structure includes a detection wheel, a floating rod, a spring, a bushing and a connecting seat, one end of the floating rod is provided with a detection wheel and is rotatably connected, the other end passes through the bushing and is fixedly connected to the connecting seat, one end of the spring abuts against the floating rod, the other end abuts against the end face of the bushing, and the connecting seat is fixedly connected to the detection mechanism.

[0013] Preferably, the unloading mechanism includes a bearing plate loading mechanism, a robot arm, and a storage platform. The motor tooling is used to transport the assembled motor. The bearing plate loading mechanism is used to load and transport the bearing plate. The robot arm is equipped with a motor clamping mechanism for gripping the motor or the bearing plate and transferring it to the storage platform. The storage platform holds the bearing plate and the motor, and a space for accommodating the motor is formed between the bearing plates.

[0014] An electric vehicle motor assembly method, using the aforementioned electric vehicle motor assembly production line, includes the following steps: A1. Rotor loading: The rotor to be loaded is picked up by the loading robot arm after passing through the conveying loading mechanism and placed at the loading positioning mechanism for hole finding and positioning; the rotor after positioning is picked up by the loading robot arm and placed at the first tooling position of the motor tooling on the transmission line; A2. Hub cover loading: The motor fixture moves to the hub cover loading mechanism on the transmission line. The hub cover conveyor transports the hub cover to be loaded to the rotary table. The second bearing loading device places the second bearing to be pressed under the second bearing pressing device. The second bearing pressing device presses the second bearing into the hub cover. The glue applicator applies glue to the edge of the hub cover. The vision component detects whether the glue application of the hub cover is qualified. The qualified hub cover is transferred by the output device to the first fixture position of the motor fixture on the transmission line. A3. Hub cover gluing: The motor fixture moves on the transmission line to the hub cover gluing mechanism, where the hub cover and rotor are pressed and glued together. A4. Hub cover nailing: The motor fixture moves on the transmission line to the hub cover nailing mechanism and installs connecting nails at the connection position between the hub cover and the rotor; A5. Rotor flipping: The motor fixture moves to the flipping mechanism on the transmission line. The rotor flipping cylinder flips the rotor and hub cover combination structure by 180°. The angle recognition camera takes a picture and identifies the rotor hole angle deviation. The bracket rotation motor drives the rotor and hub cover combination structure to rotate in the opposite direction to complete the angle compensation and place it at the second fixture position of the motor fixture. A6. End cover loading and stator installation: The motor fixture moves to the end cover loading mechanism on the transmission line. The end cover loading mechanism moves the end cover to be loaded to the motor fixture. The operator installs the stator, spindle and end cover on the rotor. A7. Bearing press-fitting: The motor fixture moves on the transmission line to the bearing press-fitting mechanism and presses the first bearing and the second bearing, along with the end cover and hub cover, into place. A8. End cover nailing: The motor fixture moves on the transmission line to the end cover nailing mechanism and installs connecting nails at the connection position between the end cover and the rotor; A9. Marking: The motor fixture moves on the transmission line to the marking mechanism, where the motor is labeled, engraved, and oiled; A10. Oil seal pressing: The motor fixture moves to the oil seal pressing mechanism on the transmission line. The oil seal feeding mechanism moves the oil seal to be fed to the end cover and hub cover and presses the oil seal into the end cover and hub cover. A11. Electrical Inspection Preparation: The motor fixture is moved to the electrical inspection preparation station on the transmission line, the motor is rotated 90° and placed on the electrical inspection station, and the operator connects the motor's wiring to the motor fixture. A12. Motor electrical inspection: The motor fixture moves on the transmission line to the electrical inspection mechanism, and the motor is inspected under both no-load and load conditions. A13. End jump detection: The motor fixture moves on the transmission line to the end jump detection mechanism, where the first detection assembly performs end jump detection on the motor end face; A14. Motor unloading: The motor fixture moves on the transmission line to the unloading mechanism, and the motor is unloaded from the motor fixture.

[0015] The beneficial effects of this invention are as follows: An automated wheel motor assembly line was designed, which enables all processes except stator loading and installation, motor electrical testing and wiring to be automated and connected, significantly reducing manual intervention, improving the automation efficiency of the assembly line, improving product assembly accuracy and stability, and reducing equipment, time and labor costs for assembly. The rotor positioning mechanism achieves coarse positioning by detecting the position of the air nozzle hole with a sensor, and achieves fine positioning by inserting the positioning pin into the positioning hole. It adopts a step-by-step positioning method of coarse positioning and fine positioning to achieve efficient and accurate circumferential positioning of the rotor to meet the needs of subsequent assembly. The automatic transfer, flipping and movement between multiple stations of the rotor are completed by the transfer and feeding mechanism. The hub cover feeding mechanism can automatically complete all processes such as hub cover feeding and conveying, bearing feeding and pressing, gluing, and output. It is equipped with vision components to detect the assembly process and ensure assembly quality and accuracy. The bearing press-fitting mechanism can automatically press-fit bearings on both sides of the motor, and the pressing force is applied to the inner ring of the bearing, pressing the bearing onto the main shaft. This ensures that the bearing components are not damaged during the press-fitting process, avoiding assembly quality problems caused by press-fitting. By integrating force and displacement sensors into the pressure mechanism, the pressing force and pressing distance during the bearing press-fitting process can be monitored in real time, facilitating timely judgment on whether the bearing press-fitting is in place and the magnitude of the pressing force, thus ensuring the quality of bearing press-fitting. The electrical inspection mechanism is equipped with electrical inspection stations. Through motor fixtures and wiring mechanisms, it can automatically connect the motor to be inspected to the electrical inspection equipment, avoiding the risk of leakage during manual operation. It employs a detection mechanism and a load mechanism to complete automatic detection and load application, improving detection efficiency and enabling efficient and safe load application. The electrical inspection production line uses multiple cooperating conveyor mechanisms to achieve automatic movement of the motor fixtures and the motor to be inspected, improving detection and loading / unloading efficiency. It can simultaneously meet the detection and loading / unloading coordination of multiple electrical inspection stations, further improving detection efficiency. The end-jump detection mechanism performs end-jump detection on the motor end face after assembly, avoiding problems such as swaying, vibration, or accelerated bearing wear during rotation due to irregularities in the rotor end face or surface. This ensures the quality of motor assembly, operational stability, and safety. The mechanism achieves automatic detection during assembly, resulting in high efficiency and reduced manual operation. A protective structure is also provided at the end of the detection mechanism (i.e., the displacement sensor) to reduce damage caused by direct contact between the tangential force generated during rotor rotation and the displacement sensor, protecting the sensor, extending its service life, and improving detection stability. The unloading mechanism enables automatic unloading and palletizing of motors, and provides a storage platform for motors. The storage platform is equipped with a support plate for placing motors, making storage more convenient and stable, and facilitating subsequent transfer and transportation. Attached Figure Description

[0016] Figure 1 : Schematic diagram of the structure of the present invention; Figure 2 : Schematic diagram of the rotor feeding mechanism of the present invention; Figure 3 : A schematic diagram of part of the rotor feeding mechanism of the present invention; Figure 4 : Schematic diagram of the rotor positioning mechanism of the present invention; Figure 5 : Schematic diagram of the hub cover feeding mechanism of the present invention; Figure 6 : Another structural schematic diagram of the hub cover feeding mechanism of the present invention; Figure 7 : Schematic diagram of the hub cover conveying device of the present invention; Figure 8 : Schematic diagram of the hub cover clamping structure and hub cover moving mechanism of the present invention; Figure 9 : Schematic diagram of the structure of the second bearing feeding device and the second bearing pressing device of the present invention; Figure 10 : Schematic diagram of the structure of the second bearing feeding device of the present invention; Figure 11 : Schematic diagram of the limiting component structure in the hub cover feeding mechanism of the present invention; Figure 12 : A schematic diagram of the adhesive application device in the hub cover feeding mechanism of the present invention; Figure 13 : A schematic diagram of the hub cover ejection mechanism in the hub cover feeding mechanism of the present invention; Figure 14 : Schematic diagram of the flipping device structure in the hub cover feeding mechanism of the present invention; Figure 15 : A schematic diagram of the output device structure in the hub cover feeding mechanism of the present invention; Figure 16 : Schematic diagram of the hub cover adhesive bonding mechanism of the present invention; Figure 17 : Schematic diagram of the hub cap nailing mechanism of the present invention; Figure 18 : Schematic diagram of the flipping mechanism of the present invention; Figure 19 : Schematic diagram of the end cap feeding mechanism of the present invention; Figure 20 : Another structural schematic diagram of the end cap feeding mechanism of the present invention; Figure 21 : Schematic diagram of the bearing press-fitting mechanism of the present invention; Figure 22 : A cross-sectional view of the bearing press-fitting mechanism of the present invention; Figure 23 This invention Figure 20 Enlarged view of a portion of point A in the middle; Figure 24 : A cross-sectional view of the lifting mechanism portion of the bearing press-fitting mechanism of this invention; Figure 25 : Schematic diagram of the lifting platform structure in the bearing press-fitting mechanism of this invention; Figure 26 : Schematic diagram of the pin-pulling mechanism of this invention; Figure 27 : Schematic diagram of the labeling mechanism and engraving mechanism of this invention; Figure 28 : Schematic diagram of the oiling mechanism of this invention; Figure 29 : Schematic diagram of the oil seal pressing mechanism and electrical inspection preparation station of the present invention; Figure 30 : Another structural schematic diagram of the oil seal pressing mechanism and electrical inspection preparation station of the present invention; Figure 31 : Schematic diagram of the electrical inspection mechanism of this invention; Figure 32 : A partial structural diagram of the electrical testing mechanism of this invention (with the soundproof room removed); Figure 33 : Schematic diagram of the electrical inspection station structure of this invention; Figure 34: Another structural schematic diagram of the electrical inspection station of the present invention; Figure 35 This invention Figure 34 Enlarged view of a section at point B in the middle; Figure 36 : A partial enlarged view of the detection mechanism in the electrical testing mechanism of this invention; Figure 37 : Schematic diagram of the bottom structure of the electrical inspection station of the present invention; Figure 38 : Schematic diagram of the end jump detection mechanism of the present invention; Figure 39 : A partial structural diagram of the end jump detection mechanism of this invention; Figure 40 : Schematic diagram of the first detection assembly and protection mechanism of the present invention; Figure 41 : Schematic diagram of the detection mechanism and the alignment mechanism of this invention; Figure 42 : Schematic diagram of the lower part mechanism of this invention; Figure 43 : A schematic diagram of the loading mechanism on the bearing plate in the unloading mechanism of this invention; Figure 44 : A schematic diagram of the lifting component structure in the lowering mechanism of this invention; Figure 45 : A schematic diagram of the pushing component structure in the unloading mechanism of this invention; Figure 46 : Schematic diagram of the loading rack structure in the unloading mechanism of this invention; Figure 47 : A schematic diagram of the motor clamping mechanism in the unloading mechanism of this invention; Figure 48 : Another schematic diagram of the motor clamping mechanism in the unloading mechanism of the present invention; Figure 49 : Schematic diagram of the motor structure of this invention; Figure 50 : A cross-sectional view of the motor structure of this invention; Figure 51 : Schematic diagram of the motor rotor structure of this invention; Figure 52 : Schematic diagram of the motor tooling structure of the present invention. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0018] In the description of this invention, it should be understood that the terms "center," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," and "inner," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0019] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] like Figures 49 to 51As shown, the motor 8 assembled in this embodiment includes a rotor 81 and end covers 82 and hub covers 83 on both sides, with a stator 84 passing through its center. A first bearing 861 and an oil seal 87 are provided at the contact position between the stator main shaft and the end cover 82, and a second bearing 862 and an oil seal 87 are provided at the contact position between the stator main shaft and the hub cover 83. The rotor 81 is provided with an air nozzle hole 811 and a positioning hole 812. Normally, the axes of the air nozzle hole 811 and the positioning hole 812 below it are parallel and distributed on the same radius line of the rotor 81. However, there are exceptions, namely, the lines connecting the axes of the air nozzle hole 811 and the positioning hole 812 to the axis of the rotor 81 do not coincide. In this case, when positioning only through the air nozzle hole 811, there will be a circumferential positioning error of the rotor 81, with the error range within tens of micrometers.

[0021] like Figures 1 to 48 As shown, an electric vehicle motor assembly production line includes, in sequence, a rotor feeding mechanism 1, a hub cover feeding mechanism 2, a hub cover gluing mechanism 101, a hub cover nailing mechanism 102, a flipping mechanism 103, an end cover feeding mechanism 104, a bearing pressing mechanism 3, an end cover nailing mechanism 106, an marking mechanism, an oil seal pressing mechanism 108, an electrical inspection mechanism 4, an end jump detection mechanism 5, and a part unloading mechanism 6, as well as a motor fixture 7 and a transmission line 9. The motor fixture 7 carries the motor 8 to be assembled and the assembled motor 8, and moves sequentially to the mechanism position on the transmission line 9.

[0022] like Figure 52 As shown, the motor fixture 7 includes a fixture plate 71, which moves on the transmission line 9. A first positioning bracket 711, a second positioning bracket 721, and an electrical inspection bracket 731 are sequentially fixed on the fixture plate 71. The first positioning bracket 711, the second positioning bracket 721, and the electrical inspection bracket 731 respectively form a first fixture position, a second fixture position, and a detection position. A junction box 732 and a power switch 733 are also provided on the fixture plate 71. The wires of the motor 8 placed at the detection position are electrically connected to the fixture plate 71 through the junction box 732. The power switch 723 controls the on / off of the electrical connection between the junction box 732 and the motor to be tested.

[0023] like Figures 2 to 4 As shown, the rotor feeding mechanism 1 includes a rotor positioning mechanism for detecting the circumferential position of the rotor 81, a conveying feeding mechanism, and a discharging mechanism 18.

[0024] The rotor positioning mechanism includes a loading frame 111 and a rotor actuation assembly 14, a rotor hole-finding assembly 16, and positioning pins 172 mounted on it. The rotor actuation assembly 14 includes a rotor rotary motor 141 and a rotor rotary table 142. The rotor rotary motor 141 drives the rotor rotary table 142 to rotate in a horizontal plane, and the rotor 81 to be positioned is carried on the rotor rotary table 142. The rotor rotary table 142 is provided with rotor positioning pins 143 for positioning the rotor 81. There are multiple rotor positioning pins 143, at least three, which are evenly distributed around the axis of the rotor rotary table 142. The rotor positioning pins 143 abut against the inner diameter of the rotor 81 to achieve relative fixation between the rotor 81 and the rotor rotary table 142. The rotor hole-finding assembly 16 includes a nozzle hole detection sensor 151 for detecting the position of the nozzle hole 811 on the rotor 81. The nozzle hole detection sensor 151 can be a laser sensor, infrared sensor, etc., and detects the position of the nozzle hole 811 on the rotor 81 by detecting the presence of an object at the target location or the distance of the detected object from the sensor. Preferably, the rotor hole-finding assembly also includes a nozzle hole lifting cylinder 152, which is vertically mounted on the loading frame 111. The nozzle hole detection sensor 151 is mounted on the actuating end of the nozzle hole lifting cylinder 152. The nozzle hole lifting cylinder 152 drives the nozzle hole detection sensor 151 to adjust its position in the vertical direction to adapt to the detection needs of rotors 81 of different specifications.

[0025] Preferably, the rotor hole-finding assembly further includes a rotor limiting mechanism 16. The rotor limiting mechanism 16 includes a limiting lifting drive mechanism 161, a limiting lifting platform 162, a limiting sliding cylinder 163, and a limiting sliding block 164. The limiting lifting drive mechanism 161 is vertically mounted on the loading frame 111 and drives the limiting lifting platform 162 to move vertically. The limiting sliding cylinder 163 is horizontally fixed on the limiting lifting platform 162 and radially positioned along the rotor 81. The limiting sliding cylinder 163 drives the limiting sliding block 164 to slide radially along the rotor 81. When the limiting sliding block 164 extends towards the rotor 81, its end abuts against the central groove on the outer surface of the rotor 81. This abutment presses the rotor 81 firmly onto the rotor rotating table 142, preventing the positioning pin 172 from being lifted upwards and unable to be smoothly inserted and positioned when it is inserted into the positioning hole 812. Preferably, a limiting pressure roller 165 is rotatably provided at one end of the limiting sliding block 164 near the rotor 81. The axis of the limiting pressure roller 165 is arranged radially along the rotor 81. When the limiting sliding block 164 extends toward the rotor 81, the limiting pressure roller 165 abuts against the outer surface of the rotor 81.

[0026] The positioning pin 172 is located below the rotor rotary table 142 and moves vertically. The positioning pin 172 is inserted into the positioning hole 812 of the rotor 81. Preferably, the positioning pin 172 is fixedly connected to the positioning pin lifting cylinder 171, which is mounted vertically on the loading frame 111 and drives the positioning pin 172 to move vertically.

[0027] The process of rotor 81 positioning and hole finding includes: The rotor 81 to be positioned is placed on the rotor rotary table 142 and relatively fixed by the rotor positioning pin 143. The rotor rotation motor 141 drives the rotor rotary table 142 and the rotor 81 to rotate. During the rotation, the air nozzle hole detection sensor 151 detects the air nozzle hole 811. When the air nozzle hole detection sensor 151 detects the air nozzle hole 811, the rotor rotation motor 141 stops, completing the coarse positioning of the rotor 81. The limit sliding cylinder 163 drives the limit sliding block 164 to extend towards the rotor 81 until the limit pressure roller 165 presses against the outer surface of the rotor 81. The positioning pin lifting cylinder 171 drives the positioning pin 172 to rise until it is inserted into the positioning hole 812, completing the fine positioning of the rotor 81. The upper end of the positioning pin 172 has a conical structure, which facilitates the self-adaptation of the positioning pin 172 and the positioning hole 812. During the self-adaptation process, the rotor 81 rotates slightly relative to the rotor limit mechanism 16.

[0028] The conveying and feeding mechanism is mounted on the feeding frame 111 and includes a feeding conveyor belt 112, a feeding flipping mechanism 12, a feeding positioning mechanism 13, and a feeding robotic arm 113 arranged in sequence. The feeding flipping mechanism 12 includes a flipping cylinder 123 for flipping the rotor 81 on the feeding conveyor belt 112 by 180°. The feeding robotic arm 113 includes rotor grippers for holding the rotor 81. The feeding robotic arm 113 moves between the feeding positioning mechanism 13 and the rotor positioning mechanism and can transfer the rotor 81 that has been positioned on the rotor positioning mechanism to the next process or the motor fixture 7.

[0029] Specifically, such as Figure 3As shown, the feeding and tilting mechanism 12 also includes a tilting lifting plate 125, a tilting lifting electric cylinder 126, a tilting pushing cylinder 121, a tilting pushing frame 122, and a tilting clamping frame 124. The tilting lifting electric cylinder 126 is mounted vertically on the feeding frame 111 and drives the tilting lifting plate 125 to move vertically. The tilting pushing cylinder 121 is mounted horizontally on the tilting lifting plate 125. There are two tilting pushing cylinders 121, which are arranged in parallel and opposite directions. There are two tilting pushing frames 122, which are respectively connected to the actuating ends of the two tilting pushing cylinders 121. Tilting cylinders 123 are respectively connected to the two tilting pushing frames 122, and the tilting cylinders 123 are arranged opposite to each other. The movable end of the tilting cylinder 123 is connected to the tilting clamping frame 124 for clamping the rotor 81, and the relative inner sides of the tilting clamping frame 124 are arc-shaped.

[0030] For the rotor 81, which is placed in the opposite direction during loading, when it is transferred to the loading tilting mechanism 12 on the loading conveyor belt 112, the tilting push cylinder 121 drives the tilting push frame 122 and the tilting clamping frame 124 to move, so that the tilting clamping frame 124 clamps and fixes the rotor 81. The movable end of the tilting lifting electric cylinder 126 extends upward and drives the rotor 81 upward to disengage from the loading conveyor belt 112. The movable end of the tilting cylinder 123 rotates, driving the tilting clamping frame 124 and the rotor 81 to tilt. Then, the tilting lifting electric cylinder 126 drives the rotor 81 to fall back onto the loading conveyor belt 112, the tilting push cylinder 121 resets, and releases the rotor 81. The rotor 81 continues to move on the loading conveyor belt 112, waiting for the loading robotic arm 113 to grab it.

[0031] The rotor 81 to be loaded is transported by the loading conveyor belt 112, and after being flipped and positioned by the loading flipping mechanism 12 and the loading positioning mechanism 13, it is picked up by the loading robotic arm 113 and placed at the rotor positioning mechanism for hole finding and positioning. The positioned rotor 81 is picked up by the loading robotic arm 113 and placed on the motor fixture 7 of the transmission line 9. If a defective or unqualified rotor 81 is found during the positioning process, or if the positioning of the rotor 81 fails, it is picked up by the loading robotic arm 113 and placed at the rotor unloading mechanism 18 for manual inspection.

[0032] like Figures 5 to 15As shown, the hub cover loading mechanism 2 includes a rotary table 21, a hub cover conveying device 22, a second bearing loading device 23, a second bearing pressing device 24, an adhesive applicator 25, a vision component 26, and an output device 27. The hub cover conveying device 22 is used to convey the hub cover 83 onto the rotary table 21. The second bearing loading device 23 is located on one side of the rotary table 21 and is used for loading the second bearing 862. The second bearing pressing device 24 is located above the rotary table 21 and is used for pressing the second bearing 862 onto the hub cover 83. The adhesive applicator 25 is located on one side of the second bearing pressing device 24 and is used for applying adhesive to the hub cover 83. The vision component 26 is located above the rotary table 21 and is used for adhesive application detection. The output device 27 is located on one side of the vision component 26 and is used for outputting the product after detection. Preferably, the vision component is a vision camera.

[0033] The hub cover conveying device 22 includes a hub cover conveying line 221, a hub cover clamping mechanism 222, and a hub cover moving mechanism 223. The hub cover conveying line 221 is mounted on a frame and is used to convey hub covers 83. The hub cover clamping mechanism 222 is used to clamp the hub cover 83. The hub cover moving mechanism 223 drives the hub cover clamping mechanism 221 to move in the horizontal and vertical directions.

[0034] The hub cover moving mechanism 223 includes a horizontal cylinder 2231 and a vertical cylinder 2232. The horizontal cylinder 2231 is mounted on the frame, and the vertical cylinder 2232 is located at the output end of the horizontal cylinder 2231 and is driven by the horizontal cylinder 2231 to move horizontally. The hub cover clamping mechanism 222 is located at the output end of the vertical cylinder 2232 and is driven by the vertical cylinder 2232 to move vertically. The hub cover clamping mechanism 222 includes a first connecting frame 2221, a first driving mechanism 2222, a gripper mounting base 2223, and a first gripper 2224. The first connecting frame 2221 is located at the output end of the vertical cylinder 2232, the first driving mechanism 2222 is located on the first connecting frame 2221, the gripper mounting base 2223 is symmetrically arranged on both sides of the output end of the first driving mechanism 2222, and the first gripper 2224 is located at the bottom end of the gripper mounting base 2223.

[0035] The second bearing feeding device 23 includes a centrifugal vibratory plate 231, a support platform 232, a limiting component 233, and a pushing cylinder 234. The centrifugal vibratory plate 231 is equipped with a second bearing 862 and is used for feeding the second bearing 862. The support platform 232 is located at the end of the centrifugal vibratory plate 231. The limiting component 233 is located on the support platform 232 and is used for limiting the second bearing 862. The pushing cylinder 234 is located on one side of the support platform 232 and drives the support platform 232 to move in the horizontal direction.

[0036] Based on the above technical solution, the limiting component 233 includes a limiting block 2331, a limiting gripper 2332, and a second driving mechanism 2333. The limiting block 2331 is fixedly disposed at the top of the support platform 232. The limiting gripper 2332 is symmetrically disposed on the support platform 232 and located on one side of the limiting block 2331. The second driving mechanism 2333 is disposed at the bottom of the support platform 232 and drives the limiting gripper 2332 to move synchronously in the opposite direction.

[0037] The second bearing pressing device 24 includes a servo press 241 and a first pressing head 242. The servo press 241 is correspondingly arranged above the rotary table 21, and the first pressing head 242 is arranged at the output end of the servo press 241 and is used for clamping the second bearing 862.

[0038] After the hub cap 83 is conveyed to the corresponding workstation, the rotary table 21 rotates at a corresponding angle to load and press the second bearing 862. During loading, the second bearing 862 is fed onto the support platform 232 by a centrifugal vibratory feeder 231. The support platform 232 is equipped with a limiting component 233 to limit the movement of the second bearing 862. In operation, the second drive mechanism 2333 drives the limiting gripper 2332 to move synchronously in the opposite direction, opening or closing the gripper. Combined with a limiting block on one side, this ensures the stability of the second bearing 862 during its transfer from the push cylinder 234 to the rotary table 21, preventing it from falling. During pressing, the servo press 241 moves downwards, and the first press head 242 presses the hub cap 83 and the second bearing 862 loaded in the previous steps.

[0039] The glue application device 25 includes a glue gun 251, a glue gun moving mechanism, and a hub cover ejection and rotation mechanism. The glue gun 251 is inclinedly arranged on one side of the rotary worktable 21. The glue gun moving mechanism includes a glue gun cylinder 2521 and a linear module 2522. The glue gun 251 is connected to the output end of the glue gun cylinder 2521 through a glue gun mounting plate 2523. The glue gun cylinder 2521 is mounted on the slider of the linear module 2522. The glue gun cylinder 2521 and the linear module 2522 are inclined at the same angle as the glue gun 251. The hub cover ejection and rotation mechanism includes an ejection cylinder 2531, a hub cover support frame 2532, a first drive motor 2533, a rotating seat 2534, and a limiting bracket 2535. The ejection cylinder 2531 is mounted at the bottom end of the rotating worktable 21. The hub cover support frame 2532 is fixedly mounted at the output end of the ejection cylinder 2531. The first drive motor 2533 is mounted on the hub cover support frame 2532 and drives the rotating seat 2534 to rotate. The limiting bracket 2535 is mounted at the top end of the rotating seat 2534 and is used for limiting and supporting the hub cover.

[0040] It also includes a flipping device 28 disposed below the vision component 26. The flipping device 28 includes a lifting drive cylinder 281, a second drive motor 282, a third drive mechanism 283, and a flipping gripper 284. The second drive motor 282 is disposed at the output end of the lifting drive cylinder 281 and is driven by the lifting drive cylinder 281 to move in the vertical direction. The third drive mechanism 283 is disposed at the output end of the second drive motor 282. The flipping gripper 284 is symmetrically disposed on both sides of the output end of the third drive mechanism 283.

[0041] After the glue application process is completed, the vision component 26 inspects the glue application. If the glue passes the inspection, it is flipped 180° by the flipping device 28 and enters the output device 27. If the glue fails the inspection, it is output through the flow strip on one side of the frame for easy collection of defective products. The following describes the situation after the glue passes the inspection in detail: Since the hubcap loading and assembly process is in the opposite direction to the next process, a flipping operation is required after the hubcap assembly is completed and before proceeding to the next process. Specifically, when the flipping device 28 is working, the flipping gripper 284, driven by the third drive mechanism 283, firmly clamps the hubcap 83 to be flipped. The lifting drive cylinder 281 drives the flipping gripper 284 to move upward a certain distance, providing space for flipping without interference. The second drive motor 282 drives the flipping gripper 284 to rotate 180°, and then the lifting drive cylinder moves in the opposite direction, placing the flipped hubcap 83 back in its original position on the rotary table 21.

[0042] The output device 27 includes a negative pressure suction nozzle 271, a suction nozzle mounting base 272, a rotary motor 273, an output electric cylinder 274, and an output air cylinder 275. The negative pressure suction nozzle 271 is mounted on the suction nozzle mounting base 272 and there are multiple of them. The suction nozzle mounting base 272 is located at the output end of the rotary motor 273. The rotary motor is located at the output end of the output electric cylinder 274 and is driven by the output electric cylinder 274 to move in the vertical direction. The output electric cylinder 274 is located at the output end of the output air cylinder 275 and is driven by the output air cylinder 275 to move in the horizontal direction.

[0043] After the inspection is passed and the flipping operation is completed, the workpiece that has completed the hub assembly process needs to be transferred to the conveyor line for easy transport to the next process for subsequent processing. Specifically, when the output device 27 is working, it picks up the workpiece to be transferred through the negative pressure suction nozzle 271. Before picking up the workpiece, according to the position of the holes on the workpiece captured by the camera, and based on the difference in angle between the actual output hole positions, the rotary motor 273 drives the corresponding compensation angle to meet the output unloading requirements; then, the output electric cylinder 274 and the output air cylinder 275 move in the vertical and horizontal directions to transport it to the corresponding position on the conveyor line.

[0044] like Figure 16 As shown, the hub cover gluing mechanism 101 includes a hub cover press and a displacement sensor arranged in a vertical direction. The hub cover press is used to press the glued hub cover 83 onto the rotor 81, while the displacement sensor detects whether the hub cover 83 is pressed into place.

[0045] like Figure 17 As shown, the hub cap nailing mechanism 102 includes a hub cap nailing machine, which is used to install connecting nails at the connection position between the hub cap 83 and the rotor 81. The hub cap nailing machine can be a nailing device in the prior art. The hub cap nailing mechanism 102 includes a storage mechanism for recording the installation force of each connecting nail, thereby recording and tracing the installation force of each connecting nail.

[0046] like Figure 18 As shown, the flipping mechanism 103 includes a rotor flipping cylinder for flipping the motor 8 180° on the motor fixture 7. The rotor flipping cylinder is mounted on the rotor flipping bracket and drives the combined structure of rotor 81 and hub cover 83 to flip. An angle recognition camera is installed below the rotor flipping bracket. The angle recognition camera is installed below the second fixture position. A bracket rotation motor is installed on the rotor flipping bracket to drive the rotor flipping bracket to rotate in the horizontal plane. During the flipping process, the cylinder drives the rotor flipping bracket to move in the vertical direction, and the linear module drives the rotor flipping bracket to move in the horizontal direction, so that the combined structure moves from the first fixture position to above the second fixture position after flipping. Then, the angle recognition camera takes pictures and identifies the hole angle on the rotor. The bracket rotation motor drives the rotor flipping bracket to rotate in the opposite direction by the corresponding angle according to the angle difference between the taken hole angle and the standard angle. After the angle compensation is completed, the cylinder drives the rotor flipping bracket to move down and place the combined structure of rotor 81 and hub cover 83 in the second fixture position.

[0047] like Figure 19 and Figure 20 As shown, the end cap feeding mechanism 104 is similar in structure to the hub cap feeding mechanism 2, including a second rotary worktable, an end cap feeding device, a first bearing feeding device, a first bearing pressing device, a second gluing device, a second vision component, and a second output device. It is similar to the rotary worktable 21, the hub cap conveying device 22, the second bearing feeding device 23, the second bearing pressing device 24, the gluing device 25, the vision component 26, and the output device 27, respectively. The end cap 82 is transported to the second rotary worktable by the end cap feeding device. The first bearing feeding device feeds the first bearing 861 and places it on the end cap 82. The first bearing pressing device presses the first bearing 861 into the end cap 82. The second gluing device applies glue to the edge of the end cap 82. The second vision component detects whether the end cap 82 is qualified. Qualified end caps 82 are conveyed to the next process by the second output device. Unqualified end caps 82 are moved to other positions for screening.

[0048] The stator installation station 105 is located adjacent to the end cover feeding mechanism 104, where workers install the stator 84 and main shaft 85 onto the rotor 81 hub cover 83 assembly structure at the second tooling station.

[0049] The end cap nailing mechanism 106 includes an end cap nailing machine for installing connecting nails at the connection position between the end cap 82 and the rotor 81. The end cap nailing machine can be a nailing device in the prior art. The end cap nailing mechanism 106 includes a storage mechanism for recording the installation force of each connecting nail, thereby recording and tracing the installation force of each connecting nail.

[0050] like Figures 21 to 26 As shown, the bearing pressing mechanism 3 includes a lifting mechanism 31, a support sleeve 32, a pressure mechanism 33, and a second pressing head 34. The lifting mechanism 31 is located at the bottom of the pressing frame 300. The support sleeve 32 is located below the first bearing 861 and is driven by the lifting mechanism 31 to move vertically. The pressure mechanism 33 is located at the top of the pressing frame 300. The second pressing head 34 is located above the second bearing 862 and is driven by the pressure mechanism 33 to move vertically. The second pressing head 34 presses against the support sleeve 32, pressing and fixing the first bearing 861 and the second bearing 862 onto the main shaft 85.

[0051] Based on the above technical solution, the support sleeve 32 is correspondingly arranged with the inner ring of the first bearing 861, and the second pressure head 34 is correspondingly arranged with the inner ring of the second bearing 862. Preferably, both the support sleeve 32 and the second pressure head 34 are correspondingly arranged with the inner ring of the bearing, that is, during the pressing process, the pressing force is applied to the inner ring of the bearing, pressing the bearing onto the spindle. This solves the problem in the prior art where the pressing force is applied to the outer ring of the bearing when pressing the end cap, which easily causes damage to the bearing structure. The pressing effect is good and the cost is low, ensuring the subsequent performance of the product.

[0052] The main shaft 85 is provided with a stepped surface that is adapted to the first bearing 861 and the second bearing 862. The support sleeve 32 and the second pressure head 34 are both provided with a hollow structure that allows the main shaft to slide relative to each other.

[0053] Based on the above technical solution, the lifting mechanism 31 includes a lifting platform 311, a gear drive motor 312, a first bevel gear 313, a second bevel gear 314, a threaded sleeve 315, and a screw 316. The gear drive motor 312 is symmetrically arranged on the pressing frame 300 and located at both ends of the lifting platform 311. The first bevel gear 313 is driven to rotate by the gear drive motor 312. The second bevel gear 314 meshes with the first bevel gear 313 and drives the threaded sleeve 315 to rotate synchronously. The screw 316 is internally threadedly connected to the threaded sleeve 315 and slides relative to it. The end of the lifting platform 311 is fixedly connected to the screw 316.

[0054] When the lifting mechanism 31 is working, the gear drive motor 312 is started. The first bevel gear 313 rotates under the drive of the gear drive motor 312, and the second bevel gear 314 rotates under the meshing action of the first bevel gear 313. The second bevel gear 314 is sleeved on the outside of the threaded sleeve 315, which drives the threaded sleeve 315 to rotate synchronously. The screw 316 achieves linear motion in the vertical direction during the rotation of the threaded sleeve 315. The gear drive motors on both sides work synchronously, that is, the two screws move up and down synchronously, which drives the lifting platform to achieve vertical movement in the up and down direction, thereby driving the lifting of the support sleeve.

[0055] Based on the above technical solution, the press frame 300 is further provided with a pin-removing mechanism 35 for removing the positioning pin. The pin-removing mechanism 35 includes a second gripper 351, a gripper driving mechanism 352, and a moving mechanism. Two second grippers 351 are symmetrically arranged and form a clamping space between them to accommodate the positioning pin. The gripper driving mechanism 352 drives the second grippers 351 to move relative to each other. The moving mechanism is arranged on the press frame 300 and drives the gripper driving mechanism 352 to reciprocate in the vertical and horizontal directions.

[0056] Based on the above technical solution, the moving mechanism includes a vertical drive cylinder 353 and a horizontal drive cylinder 354. The gripper drive mechanism 352 is connected to the output end of the vertical drive cylinder 353 via a first mounting plate 355. The vertical drive cylinder 353 is mounted on the output end of the horizontal drive cylinder 354 via a second mounting plate 356. The horizontal drive cylinder 354 is mounted on the pressing frame 300. More preferably, the pressing frame 300 is provided with a slide rail 357, and the second mounting plate 356 is provided with a sliding groove adapted to the slide rail 357. The sliding groove is slidably connected to the slide rail 357.

[0057] When the pin-pulling mechanism 35 is working, it drives the gripper drive mechanism 352 and its second gripper 351 to move to the position of the positioning pin through the moving mechanism. After clamping the positioning pin, the moving mechanism drives it to move in the opposite direction and releases the second gripper 351 to collect the positioning pin to the designated position. Based on the above technical solution, the pressing frame 300 is provided with a positioning frame 304 for placing the motor 8.

[0058] During operation, the motor 8, which requires the bearing to be press-fitted, is placed on the positioning frame 304, with the positioning pin from the previous step still attached. The lifting mechanism 31 is activated, raising the support sleeve 32 to the bottom position of the first bearing 861. At this point, the bottom of the main shaft 85 is located inside the support sleeve 32, and the top of the support sleeve 32 abuts against the bottom of the inner ring of the first bearing 861. The pressure mechanism 33 is activated, lowering the second pressure head 34 to the top position of the second bearing 862. At this point, the top of the main shaft 85 is located inside the second pressure head 34, and the bottom of the second pressure head 34 abuts against the top of the inner ring of the second bearing 862. The pressure mechanism 33 then continues to press downwards until the first bearing 861 and the second bearing 862 are pressed tightly against the stepped surface on the main shaft 85. During the pressing process, the pressure mechanism 33 is controlled based on real-time data feedback from the force sensor and displacement sensor until the bearing pressing operation is completed.

[0059] like Figure 27 and 28 As shown, the labeling mechanism includes a labeling mechanism 1071, an engraving mechanism 1072, and an oiling mechanism 1073 arranged sequentially. The labeling mechanism 1071 includes a printer. After the printer prints the label corresponding to the motor 8, a labeling robot grabs and moves it onto the motor 8, affixing it to the surface of the motor 8. The engraving mechanism 1072 includes a laser engraving machine, used to engrave information such as the production serial number of the motor 8 onto the surface of the end cover 82 and the end surface of the rotor 81. The oiling mechanism 1073 includes an oiling spray gun, used to apply anti-rust oil to the engraved locations.

[0060] like Figure 29 and Figure 30 As shown, the oil seal pressing mechanism 108 includes two collinear oil seal pressing heads that move in opposite directions; it also includes an oil seal feeding mechanism, which can be implemented by a similar scheme or existing technology. The oil seal feeding mechanism feeds the oil seal 87 and moves it to both sides of the main shaft 85, and the oil seal pressing heads move vertically, simultaneously completing the pressing of the oil seal 87 at the end cover 82 and hub cover 83. The upper oil seal pressing head is provided with an opening groove to avoid the connection line of the main shaft 85.

[0061] An electrical inspection preparation station 109 is set up on the downstream side of the oil seal pressing mechanism 108. The electrical inspection flipping cylinder and the electrical inspection flipping frame flip the motor 8 on the second tooling position by 90° and move it horizontally to the electrical inspection position. Then, the wiring of the motor 8 to be tested is connected to the junction box 732 by manual operation, and the power switch 733 is turned on to make the motor 8 to be tested electrically connected to the tooling plate 71.

[0062] like Figures 31 to 37 As shown, the electrical inspection mechanism 4 includes a transmission mechanism, a motor electrical inspection station, and a motor fixture 7. The transmission mechanism includes an electrical inspection conveyor line 412, an electrical inspection unloading line 414, and an electrical inspection return line 415. The motor electrical inspection station is located at the electrical inspection conveyor line 412. The motor fixture 7 moves on the transmission mechanism, and the motor 8 to be inspected is placed on the motor fixture 7. The motor fixture 7 moves from the transmission line 9 to the electrical inspection unloading line 414 on the electrical inspection conveyor line 412, and moves from the electrical inspection unloading line 414 to the transmission line 9 on the electrical inspection return line 415, thereby completing the automatic loading, inspection, unloading, and return process of the motor fixture 7 and the motor 8 to be inspected.

[0063] Preferably, transition rollers 413 are respectively provided between the electrical inspection loading line 441 and the electrical inspection conveyor line 412, and between the electrical inspection conveyor line 412 and the electrical inspection unloading line 414, thereby completing the transition and transfer of the motor tooling 7 between different conveyor lines. The transition rollers 413 are driven by a motor and rotate synchronously. A device for steering the motor tooling 7 is provided at the transition rollers 413, which can be a pushing cylinder, a pushing robotic arm, or a lifting and steering pallet, etc., existing technical solutions.

[0064] The number of electrical inspection conveyor lines 412 is multiple, and the multiple electrical inspection conveyor lines 412 are arranged in parallel and in the same direction of transmission. This allows a set of transmission line 9, electrical inspection unloading line 414 and electrical inspection return line 415 to work with multiple motor electrical inspection stations, thereby significantly improving the inspection efficiency.

[0065] The motor electrical inspection station also includes a wiring mechanism located below the motor electrical inspection station. The wiring mechanism includes a wiring plug lifting cylinder 431 and a wiring plug 432. The wiring plug 432 is electrically connected to the electrical inspection equipment box 433. The wiring plug lifting cylinder 431 is set vertically and drives the wiring plug 432 to move vertically. When the wiring plug 432 rises to the inspection position, the wiring plug 432 is electrically connected to the tooling plate 71, thereby realizing the electrical connection between the electrical inspection equipment box 443 and the motor 8 to be inspected.

[0066] A positioning and lifting mechanism is also provided below the motor electrical inspection station. The positioning and lifting mechanism includes an electrical inspection stop cylinder 421, an electrical inspection positioning and lifting cylinder 422, and an electrical inspection positioning and lifting plate 423. The electrical inspection stop cylinder 421 and the electrical inspection positioning and lifting cylinder 422 are communicatively connected. The electrical inspection positioning and lifting cylinder 422 is set vertically and drives the electrical inspection positioning and lifting plate 423 to move vertically. When the motor fixture 7 moves to the motor electrical inspection station, it touches the electrical inspection stop cylinder 421. At this time, the electrical inspection positioning and lifting cylinder 422 is activated and drives the electrical inspection positioning and lifting plate 423 to move the motor fixture 7 upward. When the electrical inspection positioning and lifting plate 423 rises to the inspection position, it moves the motor fixture 7 upward and disengages it from the electrical inspection conveyor line 412, thereby realizing the positioning of the motor fixture 7.

[0067] The motor electrical inspection station includes an electrical inspection station frame 441 and an electrical inspection equipment box 443. The electrical inspection station frame 441 is equipped with a detection mechanism and a load mechanism. The detection mechanism includes an accelerometer 465 and a decibel meter 466. The accelerometer 465 slides along the axial direction of the motor under test and abuts against the end of the motor shaft. Specifically, the detection mechanism also includes a detection pushing cylinder 461, a detection pushing block 462, a floating connecting column 463, and a detection pushing plate 464. The detection pushing cylinder 461 is mounted on the electrical inspection station frame 441 along the axial direction of the motor under test and drives the detection pushing block 462 and the detection pushing plate 464 to move along the axial direction of the motor under test. The floating connecting column 463 is disposed between the detection pushing block 462 and the detection pushing plate 464. The accelerometer 465 is mounted on the side of the detection pushing plate 464 facing the motor under test. Preferably, the floating connecting column 463 includes a connecting pin that slides axially relative to the detection push block 462 and / or the detection push plate 464, and a floating spring that is sleeved on the connecting pin. The floating spring abuts between the detection push cylinder 461 and the detection push block 462, thereby realizing the adaptive adjustment of the connection length of the floating connecting column 463 and avoiding excessive force from the push block 462, which could damage the acceleration sensor 465.

[0068] The load mechanism is positioned above the motor under test and slides along the height direction on the electrical inspection station frame 441. The load mechanism includes a load roller 475, the axis of which is parallel to the axis of the motor under test, and the load roller 475 abuts against the upper part of the motor under test in the testing state. Specifically, as shown... Figure 35 and Figure 36As shown, the load mechanism further includes a load lifting cylinder 471, a load lifting plate 472, and load blocks 474. The load lifting cylinder 471 is vertically mounted on the electrical inspection station frame 441 and drives the load lifting plate 472 to move vertically. The load blocks 474 are detachably mounted on the load lifting plate 472, and load rollers 475 are connected below the load lifting plate 472. When the load lifting cylinder 471 lowers the load lifting plate 472 to its lowest position, the load rollers 475 contact the motor to be tested, and the contact force is controlled and adjusted by the number and weight of the load blocks 474.

[0069] An axial positioning mechanism is also provided on the electrical inspection station frame 441. The axial positioning mechanism includes a positioning lifting cylinder 451 and a positioning lifting plate 452. The positioning lifting cylinder 451 is installed vertically on the electrical inspection station frame 441 and drives the positioning lifting plate 452 to move. A limit sensor 454 is also connected to the positioning lifting plate 452, and the limit sensor 454 is signal-connected to the positioning lifting cylinder 451. When the positioning lifting plate 452 descends to a predetermined position, the limit sensor 454 abuts against the electrical inspection station frame 441, and the positioning lifting cylinder 451 stops moving. A clamping cylinder 456 is provided horizontally on the positioning lifting plate 452. The clamping cylinder 456 is fixedly installed on the positioning lifting plate 452 by a clamping mounting plate 455. The movable part of the clamping cylinder 456 is connected to a relatively movable clamping arm 457. The clamping arms 457 can move closer or further away from each other along the motor axis. A clamping roller 458 is connected to the clamping arm 457. The axis of the clamping roller 458 is set in the horizontal direction and is perpendicular to the axis of the motor to be tested. When the clamping arm 457 is in the clamping and positioning state, the clamping roller 458 abuts against the opposite two end faces of the motor to be tested to complete the axial positioning mechanism of the motor. When the clamping arm 457 is in the detached state, the clamping roller 458 is disengaged from the motor to be tested.

[0070] The motor electrical testing station also includes a soundproof room 442, which is installed outside the electrical testing station frame 441 and the electrical testing equipment box 443 to eliminate the influence of external noise on the test results when testing for abnormal motor noise.

[0071] The electrical testing method for motors includes the following steps: S1. The motor 8 to be tested moves from the transmission line 9 to the electrical inspection transmission line 412 along with the motor fixture 7; S2. The motor fixture 7 is transferred to the motor electrical inspection station on the electrical inspection conveyor line 412; S3. The positioning and lifting mechanism lifts the motor fixture 7 and moves it upward, disengaging it from the electrical inspection transmission line 412; S4. The wiring plug 432 is electrically connected to the tooling plate 71 of the motor tooling 7; S5. The axial positioning mechanism is activated and the motor 8 to be tested is axially positioned. Specifically, the positioning lifting cylinder 451 drives the positioning lifting plate 452 to fall, and the clamping cylinder 456 drives the clamping arm 457 to move, so that the pair of clamping rollers 458 are relatively close and the motor to be tested is axially positioned. S6. Detect the movement of the push cylinder 461 and cause the acceleration sensor 465 to abut against the shaft of the motor to be tested; drive the clamping arm 457 to move and cause the clamping roller 458 to separate from the motor to be tested. S7. The motor 8 under test rotates under no-load conditions, and the change in its sound volume is detected by the accelerometer 465 and the decibel meter 466 during the rotation. S8. The load lifting plate 472 falls to the low position, and the load roller 475 contacts the motor 8 to be tested; S9. The motor 8 under test rotates under load, and the change in its sound volume is detected by the accelerometer 465 and the decibel meter 466 during the rotation. S10. The load lifting plate 472 drives the load roller 475 to rise and disengage from the motor 8 to be tested; the positioning lifting cylinder 451 drives the positioning lifting plate 452 to rise. S11. The motor fixture 7 moves on the electrical inspection conveyor line 412 toward the electrical inspection unloading line 414; S12. The motor fixture 7 is sequentially conveyed to the transmission line 9 via the electrical inspection conveyor line 412, the electrical inspection unloading line 414, and the electrical inspection return line 415, and then transferred to the next station.

[0072] Preferably, a hot air gun is also provided at the electrical inspection return line 415. The hot air gun is positioned at the main shaft 85 that overlaps on the electrical inspection position bracket 731. The hot air gun blows air onto the electrical inspection return line 415 to the motor 8 that has completed and passed the electrical inspection, and causes the heat shrink tubing on the motor wire to shrink and deform, wrapping around the motor wire.

[0073] like Figures 38 to 41 As shown, the end jump detection mechanism 5 includes an end jump detection frame 50 and a first detection assembly 52. ​​The motor 8 to be tested is placed on the electrical detection position bracket 731. The first detection assembly 52 includes a detection mechanism 521 and a moving mechanism 522. The detection mechanism 521 is correspondingly abutted against the radial end face of the motor 8 to be tested for detecting end jump. The moving mechanism 522 is disposed at the bottom of the detection mechanism 521 and drives the detection mechanism 521 to move in the horizontal direction.

[0074] Preferably, the detection mechanism 521 is configured as a displacement sensor, which monitors the position change on the rotating end face in real time by abutting its end against the rotor surface during the rotation of the motor rotor, thereby outputting the end face runout, i.e., end runout.

[0075] It also includes a second detection assembly 53, which has the same structure as the first detection assembly 52. ​​The detection mechanism of the second detection assembly 53 is correspondingly abutted against the axial end face of the motor 8 to be tested.

[0076] Preferably, by providing a set of detection mechanisms at the axial position of the motor 8 to be tested, the axial position of the motor to be tested can be detected simultaneously with the radial position of the motor to be tested. That is, by multi-point detection, the detection accuracy of end runout detection is improved, and product quality is guaranteed.

[0077] Based on the above technical solution, the end of the detection mechanism 521 is provided with a protective structure. The protective structure includes a detection wheel 541, a floating rod 542, a spring 543, a bushing 544, and a connecting seat 545. One end of the floating rod 542 is provided with the detection wheel 541 and is rotatably connected to it. The other end passes through the bushing 544 and is fixedly connected to the connecting seat 545. One end of the spring 543 abuts against the floating rod 542, and the other end abuts against the end face of the bushing 544. The connecting seat 545 is fixedly connected to the detection mechanism 521.

[0078] A protective structure is also provided at the end of the detection mechanism 521, i.e., the displacement sensor. This structure reduces damage caused by the tangential force generated during rotor rotation directly contacting the displacement sensor, protecting the sensor and extending its service life and detection stability. Specifically, during end runout detection, the detection wheel abuts against the end face of the motor under test. When end face runout exists, the floating rod slides relative to the bushing and transmits the data to the displacement sensor via the connecting seat, thereby achieving end runout detection and protecting the displacement sensor.

[0079] Based on the above technical solution, the end jump detection frame 50 is provided with a pressing mechanism mounting plate 55 and is correspondingly arranged above the detection support frame 51. The pressing mechanism mounting plate 55 is provided with a pressing mechanism 56 for pressing the motor 8 to be tested and a straightening and centering mechanism 57 for straightening the motor 8 to be tested. The pressing mechanism 56 is symmetrically arranged on both sides of the straightening and centering mechanism 57.

[0080] More preferably, the clamping mechanism mounting plate is fixedly connected to the end jump detection frame via mounting rods 551, and multiple sets of mounting rods are symmetrically arranged.

[0081] Based on the above technical solution, the pressing mechanism 56 includes a lifting pressing drive cylinder 561 and a pressing head 562. The pressing drive cylinder 561 is fixedly mounted on the pressing mechanism mounting plate 55, and the pressing head 562 is fixedly mounted on the output end of the pressing drive cylinder 561.

[0082] A clamping mechanism 56 is also provided above the testing support frame 51. When the motor 8 to be tested is placed on the testing support frame 51, the main shaft of the motor to be tested is placed on the symmetrically arranged testing support frame 51. The clamping head 562 moves downward under the driving action of the clamping drive cylinder 561, clamping and fixing the two ends of the main shaft to the testing support frame 51, preventing shaking, vibration and other states during rotation from adversely affecting the test results and ensuring the test accuracy.

[0083] Based on the above technical solution, the sorting and centering mechanism 57 includes a double piston rod cylinder 571, a drive plate 572, a connecting plate 573, and a sorting head 574. The double piston rod cylinder 571 is fixedly mounted on the pressing mechanism mounting plate 55. The drive plate 572 is symmetrically arranged on both sides of the output end of the double piston rod cylinder 571. The sorting head 574 is fixedly connected to the drive plate 572 through the connecting plate 573.

[0084] This application also includes a centering and alignment mechanism 57, which can center the motor 8 to be tested. After the motor 8 to be tested is placed on the testing support frame 51, the centering heads 574 on both sides move synchronously towards each other under the drive of the double piston cylinder 571 to center the placement position of the motor 8 to be tested. After the centering and alignment is completed, the centering and alignment mechanism 57 is reset and the clamping of the motor to be tested is released. Then, the motor 8 to be tested is controlled to rotate, and the testing mechanism 521 moves to abut against the end face of the motor 8 to perform the end jump testing process.

[0085] More preferably, the pressing mechanism mounting plate 55 is provided with a slide rail 575 and the connecting plate 573 is provided with a slide groove that matches the slide rail, making the operation more stable during the sorting process.

[0086] Based on the above technical solution, the moving mechanism 522 is configured as a cylinder, and the detection mechanism 521 is fixedly connected to the output end of the cylinder through a fixing plate 523.

[0087] like Figures 42 to 48 As shown, the unloading mechanism 6 includes a bearing plate loading mechanism 61, a robot arm 62, and a storage platform 63. The bearing plate loading mechanism 61 is used for loading and conveying the bearing plate 8. The robot arm 62 is equipped with a motor clamping mechanism 64, which is used to grab the motor 8 or the bearing plate 602, clamp it, and transfer it to the storage platform 63. The storage platform 63 holds the bearing plate 602 and the motor 8, and a space for accommodating the motor 8 is formed between the bearing plates 602.

[0088] After assembly, the motor 8 is transported from the motor fixture 7 to the unloading mechanism 6. The carrier plate loading mechanism 61 loads the carrier plate 602 for placing the motor 8 onto one side of the robot arm 62. The robot arm 62, in conjunction with the motor clamping mechanism 64 on it, first transfers the carrier plate 602 to the storage platform 63, and then transports the motor 8 onto the carrier plate 602. After the carrier plate 602 is full of motor 8, the robot arm 62 grabs the carrier plate 602 from the carrier plate loading mechanism and places it on the motor 8, and then continues to grab and place the motor 8.

[0089] Based on the above technical solution, the bearing plate loading mechanism 61 includes a lifting frame 611, a lifting component 612, a pushing component 613, and a loading rack 614. Multiple bearing plates 602 are placed on the lifting frame 611. The lifting component 612 is mounted on the frame 615 and drives the lifting frame 611 to reciprocate in the vertical direction. The pushing component 613 is mounted on one side of the frame 615 and is correspondingly mounted to the bearing plates 602. The loading rack 614 is mounted on one side of the lifting frame 611 and is used for loading the bearing plates 602.

[0090] Based on the above technical solution, a position sensor is also provided on the frame 615, and the position sensor is electrically connected to the pushing component 613. Preferably, by providing a position sensor on one side of the frame, when the lifting component 612 transports the carrier plate 602 to the position sensor, an electrical signal is sent to the pushing component 613, which then activates to push the carrier plate 602 onto the loading rack 614, facilitating the robotic arm 62 to grasp and load the carrier plate 602.

[0091] The lifting assembly 612 includes a gear drive motor 6121, a first chain 6122, a first rotating shaft 6123, a third bevel gear 6124, a fourth bevel gear 6125, a second rotating shaft 6126, and a second chain 6127. The gear drive motor 6121 drives the first rotating shaft 6123 to rotate via the first chain 6122. The third bevel gear 6124 is symmetrically arranged at both ends of the first rotating shaft 6123. The fourth bevel gear 6125 meshes with the third bevel gear 6124 and is sleeved on the second rotating shaft 6126. The second rotating shaft 6126 drives the second chain 6127 to rotate on the frame 615 via gears. The lifting frame 611 is arranged on the second chain 6127. It is understood that the third bevel gear 6124 is symmetrically arranged at both ends of the first rotating shaft 6123, and the corresponding lifting frame 611 is also symmetrically arranged on both sides of the bearing plate 602. The bearing plate 602 moves synchronously in the vertical direction through the synchronous drive rod of the first rotating shaft 6123.

[0092] Based on the above technical solution, the pushing component 613 includes a linear module 6131, a slide table 6132, and a push plate 6133. The linear module 6131 is mounted on the frame 615, the slide table 6132 is mounted on the linear module 6131 and is driven to slide by the linear module 6131, and the push plate 6133 is fixedly mounted on the slide table 6132.

[0093] Based on the above technical solution, the top surface of the feeding rack 614 is inclined and is provided with a conveying slide rail 6141, and multiple conveying slide rails 6141 are arranged in parallel.

[0094] Based on the above technical solution, the top and bottom ends of the support plate 602 are both provided with grooves for accommodating the motor, and the grooves are provided with anti-slip patterns. Preferably, by providing grooves at both the top and bottom ends of the support plate 602, after the two support plates are stacked, a space for accommodating the motor is formed in the middle, which facilitates the placement of the motor and ensures the stability of the conveying process; at the same time, the anti-slip patterns in the grooves further ensure the stability of the motor during the conveying process.

[0095] Based on the above technical solution, the frame 615 is further provided with a lowering vision component 616, which is correspondingly positioned above the loading rack 614. Preferably, by providing the lowering vision component 616 above the loading rack 614, the loading support plate 602 is inspected, mainly to detect the texture direction of the anti-slip pattern in the groove, so as to correct deviation in time and facilitate the efficiency and stability of subsequent motor placement.

[0096] When the loading mechanism 61 is in operation, the load plate 602 to be loaded is placed on the lifting frame 611. When the load plate 602 needs to be lifted or lowered, the gear drive motor 6121 is started to drive the first rotating shaft 6123 to rotate through the first chain 6122, thereby driving the third bevel gear 6124 at both ends of the first rotating shaft 6123 to rotate. The fourth bevel gear 6125 meshes with the third bevel gear 6124 to achieve synchronous rotation, which in turn drives the second rotating shaft 6126 to rotate, driving the second chain 6127 to rotate, and finally driving the lifting frame 611 and the load plate placed on it to move up and down; when the movement reaches the position sensor After the position is determined, the pushing component 613 operates. The linear module 6131 drives the push plate 6133 to move via the slide table 6132, pushing the corresponding support plate 602 onto the loading rack 614. Under the action of the inclined top surface of the loading rack 614 and the conveying slide rail 6141 set on it, the support plate 602 slides to the edge of the loading rack 614. At this time, the vision component 616 inspects the support plate 602 on the loading rack 614. If the anti-slip pattern in the groove meets the requirements, the robot 62 performs subsequent transfer and conveying. If it does not meet the requirements, the robot rotates it and inspects it again until it meets the requirements before loading.

[0097] Based on the above technical solution, the motor clamping mechanism 64 includes a rotary connector 641, a second connecting frame 642, a clamping drive mechanism 643, and a third gripper 644. The rotary connector 641 is connected to the robot arm 62. The second connecting frame 642 is disposed at the bottom end of the rotary connector 641. The clamping drive mechanism 643 is disposed on the second connecting frame 642. The third gripper 644 is symmetrically disposed at both ends of the clamping drive mechanism 643 and is driven by the clamping drive mechanism 643 to move synchronously in opposite directions.

[0098] Based on the above technical solution, the clamping drive mechanism 643 is configured as a double-rod hydraulic cylinder; the third gripper 644 is configured as a bearing plate gripper or a motor gripper.

[0099] Preferably, the clamping mechanism can be divided into the following types according to the different motors of the third gripper: Figure 47 The bearing plate motor clamping mechanism shown and as follows Figure 48 The motor clamping mechanism shown can be changed to hold different items when different items need to be clamped and transported. That is, when transporting the carrier plate, the carrier plate motor clamping mechanism is changed; then when placing the motor on the carrier plate, the motor clamping mechanism is changed to transfer the motor to the carrier plate. This process continues until the carrier plate is full of motors before the next carrier plate is transferred and clamped.

[0100] An electric vehicle motor assembly method, using the aforementioned electric vehicle motor assembly production line, includes the following steps: A1. Rotor loading: The rotor 81 to be loaded is picked up by the loading robot arm 113 after passing through the conveying loading mechanism and placed at the loading positioning mechanism 13 for hole positioning; the rotor 81 after positioning is picked up by the loading robot arm 113 and placed at the first tooling position of the motor tooling 7 of the transmission line 9. A2. Hub cover loading: The motor fixture 7 moves on the transmission line 9 to the hub cover loading mechanism 2. The hub cover conveying device 22 conveys the hub cover 83 to be loaded to the rotary table 21. The second bearing loading device 23 places the second bearing 862 to be pressed into the second bearing pressing device 24. Specifically, the first pressing head 242 adsorbs the second bearing 862. Then, the servo press 241 drives the first pressing head 242 to press down until the second bearing 862 is pressed into the hub cover 83. The glue applicator 25 applies glue to the edge of the hub cover 83. The vision component 26 detects whether the glue application of the hub cover 83 is qualified. The qualified hub cover 83 is transferred by the output device 27 to the first fixture position of the motor fixture 7 on the transmission line 9. A3. Hub cover gluing: The motor tooling 7 moves on the transmission line 9 to the hub cover gluing mechanism 101, and presses and glues the hub cover 83 and the rotor 81 together. A4. Hub cover nailing: The motor tooling 7 moves on the transmission line 9 to the hub cover nailing mechanism 102 and installs the connecting nail at the connection position between the hub cover 83 and the rotor 81. A5. Rotor flipping: The motor fixture 7 moves to the flipping mechanism 103 on the transmission line 9. The rotor flipping cylinder flips the combined structure of rotor 81 and hub cover 83 by 180°. The angle recognition camera takes a picture and identifies the angle deviation of the rotor hole position. The bracket rotation motor drives the combined structure of rotor 81 and hub cover 83 to rotate in the opposite direction to complete the angle compensation and place it at the second fixture position of the motor fixture 7. A6. End cover loading and stator installation: The motor fixture 7 moves on the transmission line 9 to the end cover loading mechanism 104. The end cover loading mechanism 104 moves the end cover 82 to be loaded to the motor fixture 7. The operator installs the stator 84, the main shaft 85 and the end cover 82 on the rotor 81. A7. Bearing press-fitting: The motor tooling 7 moves on the transmission line 9 to the bearing press-fitting mechanism 3, and presses the first bearing 861 and the second bearing 862 into place with the end cover 82 and the hub cover 83. A8. End cover nailing: The motor tooling 7 moves on the transmission line 9 to the end cover nailing mechanism 106 and installs the connecting nail at the connection position between the end cover 82 and the rotor 81. A9. Marking: The motor fixture 7 moves on the transmission line 9 to the marking mechanism to affix labels, engrave, and apply oil to the motor 8; A10. Oil seal pressing: The motor tooling 7 moves on the transmission line 9 to the oil seal pressing mechanism 108. The oil seal feeding mechanism moves the oil seal 87 to be fed to the end cover 82 and hub cover 83, and presses the oil seal 87 into the end cover 82 and hub cover 83. A11. Electrical Inspection Preparation: The motor fixture 7 is moved to the electrical inspection preparation station 109 on the transmission line 9. The motor 8 is rotated 90° and placed on the electrical inspection station. The operator connects the motor 8 to the motor fixture 7. A12. Motor electrical inspection: The motor fixture 7 moves on the transmission line 9 to the electrical inspection mechanism 4, and performs electrical inspection on the motor 8 under no-load and load conditions respectively. A13. End jump detection: The motor fixture 7 moves on the transmission line 9 to the end jump detection mechanism 5, and the first detection assembly 52 performs end jump detection on the end face of the motor 8; A14. Motor unloading: The motor fixture 7 moves on the transmission line 9 to the unloading mechanism 6, and the motor 8 is unloaded from the motor fixture 7.

[0101] The present invention has been described above by way of example, but the present invention is not limited to the specific embodiments described above. Any modifications or variations made based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. An electric vehicle motor assembly production line, characterized in that, The system includes a rotor loading mechanism (1), a hub cover loading mechanism (2), a hub cover gluing mechanism (101), a hub cover nailing mechanism (102), a flipping mechanism (103), an end cover loading mechanism (104), a bearing pressing mechanism (3), an end cover nailing mechanism (106), an identification mechanism, an oil seal pressing mechanism (108), an electrical inspection preparation station (109), an electrical inspection mechanism (4), an end jump detection mechanism (5), and a part unloading mechanism (6), as well as a motor fixture (7) and a transmission line (9). The motor fixture (7) carries the motor to be assembled and the assembled motor (8) and moves sequentially to the mechanism position on the transmission line (9). The identification mechanism includes a labeling mechanism (1071), an engraving mechanism (1072), and an oiling mechanism (1073) arranged sequentially. The rotor feeding mechanism (1) includes a rotor positioning mechanism for detecting the circumferential position of the rotor (81) and a conveying feeding mechanism; the rotor positioning mechanism includes a feeding frame (111) and a rotor actuation assembly (14), a rotor hole-finding assembly (16), and a positioning pin (172) thereon; the rotor actuation assembly (14) includes a rotor rotary motor (141) and a rotor rotary table (142), the rotor rotary motor (141) drives the rotor rotary table (142) to rotate in the horizontal plane, and the rotor (81) to be positioned is carried on the rotor rotary table (142); the rotor hole-finding assembly (16) includes an air nozzle detection sensor (151) for detecting the position of the air nozzle hole (811) on the rotor (81); the positioning The pin (172) is located below the rotor rotary table (142) and moves in the vertical direction. The positioning pin (172) is inserted into the positioning hole (812) of the rotor (81). The conveying and feeding mechanism is located on the feeding frame (111) and includes a feeding conveyor belt (112), a feeding flipping mechanism (12), a feeding positioning mechanism (13) and a feeding robotic arm (113) arranged in sequence. The feeding flipping mechanism (12) includes a flipping cylinder (123) for flipping the rotor (81) on the feeding conveyor belt (112) by 180°. The feeding robotic arm (113) includes a rotor gripper for clamping the rotor (81) and moves between the feeding positioning mechanism (13) and the rotor positioning mechanism.

2. The electric vehicle motor assembly production line according to claim 1, characterized in that, The hub cover feeding mechanism (2) includes a rotary table (21), a hub cover conveying device (22), a hub cover bearing feeding device (23), a hub cover bearing pressing device (24), an adhesive applicator (25), a vision component (26), and an output device (27). The hub cover bearing feeding device (23) is located on one side of the rotary table (21), the hub cover bearing pressing device (24) is located above the rotary table (21), the adhesive applicator (25) is located on one side of the hub cover bearing pressing device (24), the vision component (26) is located above the rotary table (21), and the output device (27) is located on one side of the vision component (26).

3. The electric vehicle motor assembly production line according to claim 1, characterized in that, The bearing pressing mechanism (3) includes a lifting mechanism (31), a support sleeve (32), a pressure mechanism (33), and a second pressing head (34). The lifting mechanism (31) is located at the bottom of the pressing frame (300). The support sleeve (32) is located below the first bearing (861) and is driven by the lifting mechanism (31) to move vertically. The pressure mechanism (33) is located at the top of the pressing frame (300). The second pressing head (34) is located above the second bearing (862) and is driven by the pressure mechanism (33) to move vertically. The second pressing head (34) presses against the support sleeve (32) to press and fix the first bearing (861) and the second bearing (862) onto the main shaft (85). The support sleeve (32) is located corresponding to the inner ring of the first bearing (861), and the second pressing head (34) is located corresponding to the inner ring of the second bearing (862).

4. The electric vehicle motor assembly production line according to claim 3, characterized in that, The press frame (300) is also provided with a pin-removing mechanism (35) for removing the positioning pin. The pin-removing mechanism (35) includes a second gripper (351), a gripper driving mechanism (352), and a moving mechanism. Two second grippers (351) are symmetrically arranged and form a clamping space between them to accommodate the positioning pin. The gripper driving mechanism (352) drives the second grippers (351) to move relative to each other. The moving mechanism is arranged on the press frame (300) and drives the gripper driving mechanism (352) to reciprocate in the vertical and horizontal directions.

5. The electric vehicle motor assembly production line according to claim 1, characterized in that, The hub cap nailing mechanism (102) includes a hub cap nailing machine for installing connecting nails at the connection position between the hub cap (83) and the rotor (81); the end cap nailing mechanism (106) includes an end cap nailing machine for installing connecting nails at the connection position between the end cap (82) and the rotor (81); both the hub cap nailing mechanism (102) and the end cap nailing mechanism (106) include a storage mechanism for recording the installation force of each connecting nail.

6. The electric vehicle motor assembly production line according to claim 1, characterized in that, The electrical inspection mechanism (4) includes a motor electrical inspection station, which includes an electrical inspection station frame (441) and an electrical inspection equipment box (443). A detection mechanism and a load mechanism are provided on the electrical inspection station frame (441). An acceleration sensor (465) slides along the axial direction of the motor (8) to be inspected and abuts against the end of the motor shaft. The load mechanism is located above the motor (8) to be inspected and slides along the height direction on the electrical inspection station frame (441). The load mechanism includes a load roller (475). The axis of the load roller (475) is parallel to the axis of the motor (8) to be inspected, and the load roller (475) is in the inspection state in contact with the motor (8). The upper part of the test motor (8) abuts against the test motor; the electrical testing mechanism (4) also includes a transmission mechanism, which includes an electrical testing conveyor line (412), an electrical testing unloading line (414), and an electrical testing return line (415) in addition to the transmission line (9). The motor electrical testing station is set at the electrical testing conveyor line (412). The motor fixture (7) moves on the transmission mechanism and the motor to be tested is placed on the motor fixture (7). The motor fixture (7) moves from the transmission line (9) to the electrical testing unloading line (414) on the electrical testing conveyor line (412) and moves from the electrical testing unloading line (414) to the transmission line (9) on the electrical testing return line (415).

7. The electric vehicle motor assembly production line according to claim 1, characterized in that, The end jump detection mechanism (5) includes an end jump detection frame (50) and a first detection assembly (52); the first detection assembly (52) includes a detection mechanism (521) and a moving mechanism (522). The detection mechanism (521) is correspondingly abutted against the radial end face of the motor (8) to be tested, and is used to detect end jump. The moving mechanism (522) is located at the bottom of the detection mechanism (521) and drives the detection mechanism (521) to move in the horizontal direction. The detection mechanism (521) of the end jump detection mechanism (5) is set as a displacement sensor. The end of the mechanism (521) is provided with a protective structure, which includes a detection wheel (541), a floating rod (542), a spring (543), a bushing (544), and a connecting seat (545). One end of the floating rod (542) is provided with a detection wheel (541) and is rotatably connected to it. The other end passes through the bushing (544) and is fixedly connected to the connecting seat (545). One end of the spring (543) abuts against the floating rod (542), and the other end abuts against the end face of the bushing (544). The connecting seat (545) is fixedly connected to the detection mechanism (521).

8. The electric vehicle motor assembly production line according to claim 1, characterized in that, The unloading mechanism (6) includes a bearing plate loading mechanism (61), a robot (62), and a storage platform (63). The motor fixture (7) is used to transport the assembled motor (8). The bearing plate loading mechanism (61) is used to load and transport the bearing plate (602). The robot (62) is equipped with a motor clamping mechanism (64) for gripping the motor (8) or the bearing plate (602) and transferring it to the storage platform (63). The storage platform (63) holds the bearing plate (602) and the motor (8). A space for accommodating the motor (8) is formed between the bearing plates (602).

9. A method for assembling an electric vehicle motor, characterized in that, Using the electric vehicle motor assembly line as described in claim 2 includes the following steps: A1. Rotor loading: The rotor (81) to be loaded is picked up by the loading robot arm (113) after passing through the conveying loading mechanism and placed at the rotor loading mechanism (1) for hole positioning; the rotor (81) after positioning is picked up by the loading robot arm (113) and placed at the first tooling position of the motor tooling (7) of the transmission line (9); A2. Hub cover loading: The motor fixture (7) moves to the hub cover loading mechanism (2) on the transmission line (9). The hub cover conveying device (22) transports the hub cover (83) to be loaded to the rotary table (21). The hub cover bearing loading device (23) places the second bearing (862) to be pressed under the hub cover bearing pressing device (24). The hub cover bearing pressing device (24) presses the second bearing (862) into the hub cover (83). The glue applicator (25) applies glue to the edge of the hub cover (83). The vision component (26) detects whether the glue application of the hub cover (83) is qualified. The qualified hub cover (83) is transferred by the output device (27) to the first fixture position of the motor fixture (7) on the transmission line (9). A3. Hub cover bonding: The motor fixture (7) moves on the transmission line (9) to the hub cover bonding mechanism (101) to press and bond the hub cover (83) and the rotor (81); A4. Hub cover nailing: The motor fixture (7) moves on the transmission line (9) to the hub cover nailing mechanism (102) and installs connecting nails at the connection position between the hub cover (83) and the rotor (81); A5. Rotor flipping: The motor fixture (7) moves to the flipping mechanism (103) on the transmission line (9). The rotor flipping cylinder flips the combined structure of the rotor (81) and hub cover (83) by 180°. The angle recognition camera takes a picture and identifies the angle deviation of the rotor hole position. The bracket rotating motor drives the combined structure of the rotor (81) and hub cover (83) to rotate in the opposite direction to complete the angle compensation and place it at the second fixture position of the motor fixture (7). A6. End cover loading and stator installation: The motor fixture (7) moves on the transmission line (9) to the end cover loading mechanism (104), and the end cover loading mechanism (104) moves the end cover (82) to be loaded to the motor fixture (7). The operator installs the stator (84), main shaft (85) and end cover (82) on the rotor (81). A7. Bearing press-fit: The motor fixture (7) moves on the transmission line (9) to the bearing press-fit mechanism (3) and presses the first bearing (861) and the second bearing (862) with the end cover (82) and the hub cover (83) into place; A8. End cover nailing: The motor fixture (7) moves on the transmission line (9) to the end cover nailing mechanism (106) and installs connecting nails at the connection position between the end cover (82) and the rotor (81); A9. Marking: The motor fixture (7) moves on the transmission line (9) to the marking mechanism to label, engrave and oil the motor (8); A10. Oil seal pressing: The motor tool (7) moves on the transmission line (9) to the oil seal pressing mechanism (108), and the oil seal feeding mechanism moves the oil seal (87) to be fed to the end cover (82) and hub cover (83), and presses the oil seal (87) into the end cover (82) and hub cover (83); A11. Electrical inspection preparation: The motor fixture (7) is moved to the electrical inspection preparation station (109) on the transmission line (9), the motor (8) is rotated 90° and placed on the electrical inspection station, and the operator connects the motor (8) to the motor fixture (7). A12. Motor electrical inspection: The motor fixture (7) moves on the transmission line (9) to the electrical inspection mechanism (4) and performs electrical inspection on the motor (8) under no-load and under load conditions respectively; A13. End jump detection: The motor fixture (7) moves on the transmission line (9) to the end jump detection mechanism (5), and the first detection assembly (52) performs end jump detection on the end face of the motor (8); A14. Motor unloading: The motor fixture (7) moves on the transmission line (9) to the unloading mechanism (6) to unload the motor (8) from the motor fixture (7).

Images