Motor assembly line

Abstract

A motor assembly assembly line comprises a stator hot jacket line, and sequentially comprises an on-line device, a stator assembly device, a press-fitting device, a cooling device, a detection device and an off-line device in the workpiece conveying direction, and a truss stretching across the on-line device, the stator assembly device and the press-fitting device is arranged on the upper portion of the stator hot jacket line. A main conveying belt is arranged among the cooling equipment, the detection equipment and the offline equipment; a first driving assembly for driving a workpiece to move along an X axis and a second driving assembly for driving the workpiece to move along a Z axis are arranged on the truss; and the press-fitting process of the positioning pin, the steel ball, the bowl-shaped plug and the bearing is integrated on the hot jacket line, so that the space and the cost are saved.

Description

Technical Field

[0001] The invention relates to the field of motor manufacturing and processing, in particular to a motor assembly line. Background Art

[0002] A complete electric drive system consists of a drive motor, a transmission, a power converter and a control system. The drive motor is the core of the electric drive system. Its performance and efficiency directly affect the performance of electric vehicles. In the assembly process of the entire electric drive system, the stator shrink-fit line is the most critical process. The stator shrink-fit process is to heat the cast aluminum electric drive housing and then shrink-fit it with the stator. The shrink-fit process can ensure that the iron core and the housing have sufficient interference value and reliable combination; however, the current stator shrink-fit production line has a single function, which only performs one step of the process flow of housing heating, stator shrink-fit, cooling, and stator height detection, resulting in a cumbersome process, large space occupation, and high human resource costs. Summary of the invention

[0003] The problem to be solved by the present invention is to provide a motor assembly line, which integrates the press-fitting process of positioning pins, steel balls, bowl-shaped plugs and bearings into a shrink-fit line, saving space and cost.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: an assembly line of a motor assembly, including a stator shrink sleeve line, which includes an on-line device, a stator assembly device, a press-fitting device, a cooling device, a detection device and a down-line device in sequence according to the workpiece transportation direction, and a truss spanning the on-line device, the stator assembly device and the press-fitting device is provided on the upper part of the stator shrink sleeve line, a main conveyor belt is provided between the cooling device, the detection device and the down-line device, and a first driving component for driving the workpiece to move along the X-axis and a second driving component for driving the workpiece to move along the Z-axis are provided on the truss; The stator assembly equipment includes a mounting frame, a shell heating device arranged on the front of the mounting frame, and a stator feeding device arranged on the back of the mounting frame, the shell heating device includes a shell heating mechanism, a third driving assembly driving the shell heating mechanism to move along the Z axis, a first tray arranged below the shell heating mechanism and supporting the workpiece, and a fourth driving assembly driving the first tray to move along the Y axis, and more than two groups of shell heating mechanisms are provided on the mounting frame; the stator feeding device includes a stator loader for grabbing the stator, a second tray supporting the stator, a fifth driving assembly driving the second tray to move along the X axis, a sixth driving assembly driving the second tray to move along the Y axis, a stator gripper grabbing the stator from the second tray and making it cooperate with the workpiece, a seventh driving assembly driving the stator gripper to move along the X axis, and an eighth driving assembly driving the stator gripper to move along the Z axis; The press-fitting equipment includes a steel ball press-fitting device, a bowl-shaped plug press-fitting device and a shaft gear press-fitting device in sequence; the steel ball press-fitting device includes a steel ball press-fitting mechanism and a pin press-fitting mechanism, the steel ball press-fitting mechanism includes a third tray for supporting a workpiece, a first wedging assembly for fixing the workpiece, a steel ball pressing head for pressing a steel ball, a ninth driving assembly for driving the steel ball pressing head to move along the Y axis, a steel ball mounting plate connected to the ninth driving assembly, a tenth driving assembly for driving the steel ball mounting plate to move along the X axis, and an eleventh driving assembly for driving the steel ball mounting plate to move along the Z axis; the pin press-fitting mechanism includes a fourth tray for supporting a workpiece, a second wedging assembly for fixing the workpiece, a pin pressing head for pressing a pin, a twelfth driving assembly for driving the pin pressing head to move along the Y axis, a pin mounting plate connected to the twelfth driving assembly, a thirteenth driving assembly for driving the pin mounting plate to move along the X axis, and a fourteenth driving assembly for driving the pin mounting plate to move along the Z axis; The bowl-shaped plug pressing device includes a fifth tray supporting the housing, a fifteenth driving assembly driving the fifth tray to move along the Y axis, a third wedging assembly fixing the housing, a workpiece top surface pressing mechanism, a sixteenth driving assembly driving the workpiece top surface pressing mechanism to move along the Z axis, and a bowl-shaped plug feeder; The shaft gear pressing device includes a material bin, a seventeenth driving assembly for driving the material in the material bin to move along the Z axis, a clamping mechanism for grabbing the material, an eighteenth driving assembly for driving the clamping mechanism to move along the Z axis, a nineteenth driving assembly for driving the clamping mechanism to move along the Y axis, a sixth tray for supporting the material, a twentieth assembly for driving the sixth tray to move along the Y axis, a top block mechanism for pushing the material on the sixth tray into the workpiece, a twenty-first driving assembly for driving the top block mechanism to move along the X axis, a twenty-second driving assembly for driving the top block mechanism to move along the Y axis, a twenty-third driving assembly for driving the top block mechanism to move along the Z axis, a seventh tray for supporting the workpiece, a twenty-fourth driving assembly for driving the seventh tray to move along the Y axis, and a workpiece clamping mechanism for fixing the workpiece; The detection equipment includes a stator height detection machine, which is provided with an eighth tray supporting a shell, a twenty-fifth driving assembly driving the eighth tray to move along the Z axis, a twenty-sixth driving assembly driving the eighth tray to move along the X axis, a measuring mechanism, and a twenty-seventh driving assembly driving the measuring mechanism to move along the Z axis.

[0005] The working principle of the present invention is as follows: the workpiece is sequentially passed through the online equipment, stator assembly equipment, and press-fitting equipment through the truss; the workpiece is sequentially passed through the cooling equipment, detection equipment, and offline equipment through the main conveyor belt; the press-fitting process of the locating pins, steel balls, bowl-shaped plugs, and bearings is integrated into the shrink-fit line, saving space and cost.

[0006] As an improvement, a workpiece clamp is provided on the truss, and the first drive assembly and the second drive assembly are both gear rack transmission structures driven by motors.

[0007] As an improvement, the mounting frame is provided with four groups of shell heating mechanisms, and the shell heating mechanisms include two groups of heating coils and two groups of auxiliary heating coils arranged along the Y-axis direction, and the inner diameters of the two groups of heating coils are different.

[0008] As an improvement, the steel ball pressing device also includes a steel ball pressing frame, the steel ball pressing mechanism and the pin pressing mechanism are arranged on both sides of the steel ball pressing frame along the X-axis direction, and the third pallet and the fourth pallet are both provided with a pressure plate for fixing the workpiece; the first wedging assembly includes several groups of first wedging units, the first wedging unit includes a first push rod and a first cylinder driving the first push rod to move along the Y-axis, and the first cylinder is fixed on the steel ball pressing frame; the second wedging assembly includes several groups of second wedging units, the second wedging unit includes a second push rod and a second cylinder driving the second push rod to move along the Y-axis, and the second cylinder is fixed on the steel ball pressing frame.

[0009] As an improvement, the bowl-shaped plug pressing device also includes a bowl-shaped plug pressing frame, the third wedging assembly includes several groups of third wedging units, the third wedging unit includes a third push rod and a third cylinder driving the third push rod to move along the X-axis, and the third cylinder is fixed on the bowl-shaped plug pressing frame.

[0010] As an improvement, a steel ball tightening assembly is provided on the bowl-shaped plug pressing machine frame, and the steel ball tightening assembly is arranged on the opposite side of the third wedging assembly. The steel ball pressing assembly includes a steel ball head and a steel ball head press that drives the steel ball head to move along the X-axis.

[0011] As an improvement, the shaft gear pressing device also includes a shaft gear pressing frame and a turntable arranged at the tail of the shaft gear pressing frame, the material bin is arranged on the turntable evenly distributed in a circle, the clamping mechanism includes two locating pin clamps and two bearing clamps arranged between the locating pin clamps; two groups of bearing pressure heads and locating pin pressure heads are provided on the sixth pallet, and the bottoms of the bearing pressure heads and locating pin pressure heads are respectively provided with a bearing top sleeve and a locating pin top sleeve that pass through the sixth pallet; the head of the shaft gear pressing frame is provided with a buffer to reduce the collision with the seventh pallet.

[0012] As an improvement, the main conveyor belt includes a first conveyor section, a second conveyor section and a third conveyor section. The first conveyor section is arranged below the truss and is connected to one end of the second conveyor section through a first elevator. The second conveyor section is connected to the third conveyor section through a second elevator. The third conveyor section is arranged above the second conveyor section.

[0013] As an improvement, the cooling device comprises a cooling furnace, and the second transport section and the third transport section pass through the cooling furnace.

[0014] The beneficial effects of the present invention are as follows: the press-fitting process of the positioning pin, steel ball, bowl-shaped plug and bearing is integrated into the shrink sleeve line, the distribution layout is reasonable, and space and cost are saved; the heating coil and the auxiliary heating coil cooperate with each other to ensure that the workpiece is heated evenly and the insulation effect is good, thereby improving the shrink sleeve qualification rate; at the same time, the present invention can heat and insulate four shells at the same time through a four-channel form, which can meet the production capacity while saving manufacturing costs and reducing equipment energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a top view of the structural layout of the present invention.

[0016] Figure 2 It is a three-dimensional structural view of the shell heating device.

[0017] Figure 3 It is a front view of the shell heating device.

[0018] Figure 4 A top view of the shell heating device.

[0019] Figure 5 It is a side view of the shell heating device.

[0020] Figure 6 This is the front view of the stator loader.

[0021] Figure 7 This is a side view of the stator loader.

[0022] Figure 8 This is a top view of the stator loader.

[0023] Fig. 9 This is a three-dimensional structural view of the steel ball press-fitting device.

[0024] Fig.10 This is a front view of the steel ball press-fitting device.

[0025] Fig.11 It is a top view of the steel ball press-fitting device.

[0026] Fig.12 It is a side view of the steel ball press-fitting device.

[0027] Fig.13 It is a three-dimensional structural view of the bowl-shaped plug pressing device.

[0028] Fig.14 It is a front view of the bowl-shaped plug pressing device.

[0029] Fig.15 A side view of a bowl-shaped plug press-fit device.

[0030] Fig.16 A top view of the bowl-shaped plug press-fit device.

[0031] Fig.17 This is a three-dimensional structural view of the shaft gear press-fitting device.

[0032] Fig.18 It is a side view of the shaft gear press-fitting device.

[0033] Fig.19 This is a front view of the shaft gear press-fitting device.

[0034] Fig. 20 It is a top view of the shaft gear press-fitting device.

[0035] Fig.21 It is a front view of the cooling device and the main conveyor belt.

[0036] Fig. 22 It is a top view of the cooling device and the main conveyor belt.

[0037] Fig.23 This is a three-dimensional structural view of the stator height detection machine.

[0038] Fig.24 This is the front view of the stator height detection machine.

[0039] Fig.25 Side view of the custom height inspection machine.

[0040] Fig.26 This is a top view of the stator height detection machine.

[0041] Explanation of the numbers in the figure: 1, truss; 101, second drive assembly; 102, first drive assembly; 2, on-line equipment; 3, coding engraving equipment; 4, shell heating device; 401, mounting frame; 402, shell heating mechanism; 403, third drive assembly; 404, first tray; 405, fourth drive assembly; 406, heating coil; 407, auxiliary heating coil; 5, stator loader; 501, second tray; 502, sixth drive assembly; 503, fifth drive assembly Components; 504, stator gripper; 505, seventh drive assembly; 506, eighth drive assembly; 6, steel ball pressing device; 601, third tray; 602, first wedging assembly; 603, steel ball pressure head; 604, ninth drive assembly; 605, tenth drive assembly; 606, eleventh drive assembly; 607, fourth tray; 608, second wedging assembly; 609, pin pressure head; 610, twelfth drive assembly; 611, thirteenth drive assembly; 612, fourteenth drive Component; 7, bowl-shaped plug pressing device; 701, fifth tray; 702, third wedging assembly; 703, workpiece top surface pressing mechanism; 704, sixteenth drive assembly; 705, bowl-shaped plug feeder; 8, shaft gear pressing device; 801, turntable; 802, material bin; 803, seventeenth drive assembly; 804, clamping mechanism; 805, eighteenth drive assembly; 806, nineteenth drive assembly; 807, sixth tray; 808, twenty-second drive assembly; 809, Seven pallets; 810, workpiece clamping mechanism; 9, cooling equipment; 10, stator height detection machine; 1001, eighth pallet; 1002, twenty-fifth drive assembly; 1003, twenty-sixth drive assembly; 1004, measuring mechanism; 1005, twenty-seventh drive assembly; 11, offline equipment; 12, main conveyor belt; 1201, first conveyor section; 1202, second conveyor section; 1203, third conveyor section; 1204, first elevator; 1205, second elevator. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0043] like Figure 1As shown, a motor assembly line includes a stator heat-shrinking line, a shaft assembly line, a rotor line, a main line drive side assembly and a rotating line electronic control side assembly; the stator heat-shrinking line includes an on-line device 2, a coding engraving device 3, a stator assembly device, a press-fitting device, a cooling device 9, a detection device and an off-line device 11 in sequence according to the workpiece transportation direction, and the stator heat-shrinking line also includes a gantry 1 that transports the workpiece through an AGV and spans the on-line device 2, the stator assembly device and the press-fitting device, and the gantry 1 is provided with a workpiece gripper, a first drive component 102 that drives the workpiece gripper to move along the X axis, and a second drive component 101 that drives the workpiece gripper to move along the Z axis, and the first drive component 102 and the second drive component 101 are both gear rack structures driven by motors. The workflow of the gantry 1 and the on-line device 2 is as follows: the workpiece enters the on-line device 2, the second drive component 101 drives the workpiece gripper to grab the workpiece, and the first drive component 102 moves the workpiece gripper to the position of the stator equipment. A main conveyor belt 12 for conveying workpieces is provided between the cooling device 9 , the detection device and the offline device 11 .

[0044] like Figures 2 to 8As shown, the stator assembly equipment includes a mounting frame 401, a shell heating device 4 arranged on the front of the mounting frame 401, and a stator feeding device arranged on the back of the mounting frame 401. The shell heating device 4 includes a shell heating mechanism 402, a third driving component 403 driving the shell heating mechanism 402 to move along the Z axis, a first tray 404 arranged below the shell heating mechanism 402 and supporting the workpiece, and a fourth driving component 405 driving the first tray 404 to move along the Y axis. Four groups of shell heating mechanisms 402 are provided on the mounting frame 401, that is, there are four heating stations, which can heat and keep four shells warm at the same time, meeting the production capacity while saving the manufacturing cost; the shell heating mechanism 402 includes two groups of heating coils 406 and two groups of auxiliary heating coils 407 arranged along the Y axis direction. The inner diameters of the two groups of heating coils 406 are different, which can cope with the heating of workpieces of two different sizes. The auxiliary heating coils 407 can ensure that the shell temperature is uniform and the thermal deformation is stable. The stator loading device includes a stator loader 5 for grabbing the stator from the outside, a second tray 501 supporting the stator, a fifth driving component 503 for driving the second tray 501 to move along the X-axis, a sixth driving component 502 for driving the second tray 501 to move along the Y-axis, a stator gripper 504 for grabbing the stator from the second tray 501 and matching the stator with the workpiece, a seventh driving component 505 for driving the stator gripper 504 to move along the X-axis, and an eighth driving component 506 for driving the stator gripper 504 to move along the Z-axis. The working process of the stator equipment device is as follows: the workpiece is fixed on the first tray 404, the fourth drive assembly 405 moves the first tray 404 to the bottom of the heating coil 406, the third drive assembly 403 drives the heating coil 406 to the inside of the workpiece to heat and keep the workpiece warm; the stator loader 5 grabs the stator from the outside and moves the stator to the second tray 501, the fifth drive assembly 503, the sixth drive assembly 502 and the seventh drive assembly 505 drive the second tray 501 and the stator gripper 504 to the same X-axis and the same Y-axis position respectively, and the eighth drive assembly 506 drives the stator gripper 504 to grab the stator; after the workpiece is heated and kept warm, the sixth drive assembly 502 moves the second tray 501 to the bottom of the stator gripper 504, and the eighth drive assembly 506 moves the stator to the inside of the workpiece to complete the assembly.

[0045] like Figures 9 to 12As shown, the pressing equipment includes a steel ball pressing device 6, a bowl-shaped plug pressing device 7 and a shaft gear pressing device 8 in sequence; the steel ball pressing device 6 includes a steel ball pressing frame, a steel ball pressing mechanism arranged on one side of the steel ball pressing frame and a pin pressing mechanism arranged on the other side of the steel ball pressing frame, the steel ball pressing mechanism includes a third tray 601 for supporting a workpiece, a first wedging assembly 602 for fixing the workpiece, a steel ball pressing head 603 for pressing a steel ball, a ninth driving assembly 604 for driving the steel ball pressing head 603 to move along the Y axis, a steel ball mounting plate connected to the ninth driving assembly 604, a tenth driving assembly 605 for driving the steel ball mounting plate to move along the X axis and an eleventh driving assembly 606 for driving the steel ball mounting plate to move along the Z axis; the pin pressing mechanism includes a fourth tray 607 for supporting a workpiece, a second wedging assembly 608 for fixing the workpiece, a pressing assembly 609 for pressing a steel ball A pin press 609 for installing a pin, a twelfth driving component 610 for driving the pin press 609 to move along the Y-axis, a pin mounting plate connected to the twelfth driving component 610, a thirteenth driving component 611 for driving the pin mounting plate to move along the X-axis, and a fourteenth driving component 612 for driving the pin mounting plate to move along the Z-axis; the third pallet 601 and the fourth pallet 607 are both provided with a pressing plate for fixing the workpiece; the first wedging component 602 includes a plurality of groups of first wedging units, the first wedging unit includes a first push rod and a first cylinder for driving the first push rod to move along the Y-axis, and the first cylinder is fixed on the steel ball pressing frame; the second wedging component 608 includes a plurality of groups of second wedging units, the second wedging unit includes a second push rod and a second cylinder for driving the second push rod to move along the Y-axis, and the second cylinder is fixed on the steel ball pressing frame. The working process of the steel ball pressing device 6 is that the workpiece is transferred to the third pallet 601 through the first driving assembly 102 and the second driving assembly 101 on the truss 1 and is fixed by the pressure plate and the first wedging assembly 602, and the steel ball pressing head 603 presses the workpiece with a steel ball; the workpiece is transferred to the fourth pallet 607 through the first driving assembly 102 and the second driving assembly 101 on the truss 1 and is fixed by the pressure plate and the second wedging assembly 608, and the pin pressing head 609 presses the workpiece with a pin.

[0046] like Figures 13 to 16As shown, the bowl-shaped plug pressing device 7 includes a bowl-shaped plug pressing frame, a fifth tray 701 supporting the shell, a fifteenth driving assembly driving the fifth tray 701 to move along the Y-axis, a third wedging assembly 702 fixing the shell, a steel ball clamping assembly arranged on the opposite side of the third wedging assembly 702, a workpiece top surface clamping mechanism 703, a sixteenth driving assembly 704 driving the workpiece top surface clamping mechanism 703 to move along the Z-axis, and a bowl-shaped plug feeder 705; the third wedging assembly 702 includes a plurality of groups of third wedging units, the third wedging unit includes a third push rod and a third cylinder driving the third push rod to move along the X-axis, and the third cylinder is fixed on the bowl-shaped plug pressing frame; the steel ball clamping assembly includes a steel ball push head and a steel ball push head press driving the steel ball push head to move along the X-axis. The working process of the bowl-shaped plug pressing device 7 is as follows: the workpiece is transferred to the fifth pallet 701 through the truss 1, the fifteenth driving assembly moves the fifth pallet 701 to the bowl-shaped plug pressing station, the third wedging assembly 702 and the steel ball clamping assembly are pressed on both sides of the workpiece, and the workpiece top surface clamping mechanism 703 is pressed on the top of the workpiece to complete the assembly of the bowl-shaped plug and the workpiece.

[0047] like Figures 17 to 20As shown, the shaft gear pressing device 8 includes a shaft gear pressing frame, a turntable 801 arranged at the rear of the shaft gear pressing frame, a material bin 802 evenly distributed on the turntable 801 according to the circumference, a seventeenth driving component 803 driving the material in the material bin 802 to move along the Z axis, a clamping mechanism 804 for grabbing the material, an eighteenth driving component 805 driving the clamping mechanism 804 to move along the Z axis, a nineteenth driving component 806 driving the clamping mechanism 804 to move along the Y axis, a sixth tray 807 for supporting the material, a twentieth component driving the sixth tray 807 to move along the Y axis, a top block mechanism for pushing the material on the sixth tray 807 into the workpiece, a twenty-first driving component driving the top block mechanism to move along the X axis, and a twenty-first driving component driving the top block mechanism to move along the X axis. The twenty-second driving assembly 808 for moving along the Y-axis, the twenty-third driving assembly for driving the top block mechanism to move along the Z-axis, the seventh pallet 809 for supporting the workpiece, the twenty-fourth driving assembly for driving the seventh pallet 809 to move along the Y-axis, and the workpiece clamping mechanism 810 for fixing the workpiece; the clamping mechanism 804 includes two locating pin clamps and two bearing clamps arranged between the locating pin clamps; two groups of bearing pressure heads and locating pin pressure heads 609 are provided on the sixth pallet 807, and the bottoms of the bearing pressure heads and locating pin pressure heads 609 are respectively provided with bearing top sleeves and locating pin top sleeves that pass through the sixth pallet 807; the head of the shaft gear pressing frame is provided with a buffer to reduce the collision with the seventh pallet 809, thereby extending the service life of the device. The working process of the shaft gear pressing device 8 is as follows: the material is lifted by the eighteenth driving assembly 805 and grasped by the clamping mechanism 804, the bearing and the locating pin are transferred to the sixth pallet 807, the sixth pallet 807 moves along the Y-axis to between the small pallet and the top block mechanism, the top block mechanism lifts up the bearing top sleeve and the locating pin top sleeve, and the bearing and the locating pin then complete the assembly with the workpiece.

[0048] like Figure 1 , Figures 21 to 26As shown, the main conveyor belt 12 includes a first conveyor section 1201, a second conveyor section 1202 and a third conveyor section 1203, the first conveyor section 1201 is arranged below the truss 1, and is connected to one end of the second conveyor section 1202 through a first hoist 1204, the second conveyor section 1202 is connected to the third conveyor section 1203 through a second hoist 1205, and the third conveyor section 1203 is arranged above the second conveyor section 1202; the cooling device includes a cooling furnace, and the second conveyor section 1202 and the third conveyor section 1203 pass through the cooling furnace; the detection equipment includes a stator height detection machine 10 and a flip sampling machine, and the height detection machine is provided with an eighth tray 1001 supporting the shell, a twenty-fifth driving component 1002 driving the eighth tray 1001 to move along the Z axis, a twenty-sixth driving component 1003 driving the eighth tray 1001 to move along the X axis, a measuring mechanism 1004 and a twenty-seventh driving component 1005 driving the measuring mechanism 1004 to move along the Z axis. The workpiece is transferred to the first transport section 1201 through the gantry 1 and moves along the Y axis, then transferred to the second transport section 1202 through the first elevator 1204, and then transferred to the third transport section 1203 through the second elevator 1205 after passing the cooling furnace. After passing the cooling furnace again, the workpiece is inspected by the height detector and the flip sampling machine in turn, and after passing the inspection, it is taken offline through the offline equipment 11.

[0049] The present invention integrates the press-fitting process of positioning pins, steel balls, bowl-shaped plugs and bearings into the shrink-fit line, with a reasonable distribution layout, saving space and cost; the heating coil 406 and the auxiliary heating coil 407 cooperate with each other to ensure that the workpiece is heated evenly and has a good thermal insulation effect, thereby improving the shrink-fit qualification rate; at the same time, the present invention can heat and insulate four shells at the same time through a four-channel form, which can meet the production capacity while saving manufacturing costs and reducing equipment energy consumption.

Claims

1. A motor assembly line, including a stator shrink sleeve line, characterized in that: According to the workpiece transport direction, it includes an on-line device, a stator assembly device, a press-fit device, a cooling device, a testing device and a down-line device in sequence. The upper part of the stator shrink-fit line is provided with a gantry spanning the on-line device, the stator assembly device and the press-fit device. A main transport belt is provided between the cooling device, the testing device and the down-line device. The gantry is provided with a first driving component that drives the workpiece to move along the X-axis and a second driving component that drives the workpiece to move along the Z-axis. The stator assembly equipment includes a mounting frame, a shell heating device arranged on the front of the mounting frame, and a stator feeding device arranged on the back of the mounting frame, the shell heating device includes a shell heating mechanism, a third driving assembly driving the shell heating mechanism to move along the Z axis, a first tray arranged below the shell heating mechanism and supporting the workpiece, and a fourth driving assembly driving the first tray to move along the Y axis, and more than two groups of shell heating mechanisms are provided on the mounting frame; the stator feeding device includes a stator loader for grabbing the stator, a second tray supporting the stator, a fifth driving assembly driving the second tray to move along the X axis, a sixth driving assembly driving the second tray to move along the Y axis, a stator gripper grabbing the stator from the second tray and making it cooperate with the workpiece, a seventh driving assembly driving the stator gripper to move along the X axis, and an eighth driving assembly driving the stator gripper to move along the Z axis; The press-fitting equipment includes a steel ball press-fitting device, a bowl-shaped plug press-fitting device and a shaft gear press-fitting device in sequence; the steel ball press-fitting device includes a steel ball press-fitting mechanism and a pin press-fitting mechanism, the steel ball press-fitting mechanism includes a third tray for supporting a workpiece, a first wedging assembly for fixing the workpiece, a steel ball pressing head for pressing a steel ball, a ninth driving assembly for driving the steel ball pressing head to move along the Y axis, a steel ball mounting plate connected to the ninth driving assembly, a tenth driving assembly for driving the steel ball mounting plate to move along the X axis, and an eleventh driving assembly for driving the steel ball mounting plate to move along the Z axis; the pin press-fitting mechanism includes a fourth tray for supporting a workpiece, a second wedging assembly for fixing the workpiece, a pin pressing head for pressing a pin, a twelfth driving assembly for driving the pin pressing head to move along the Y axis, a pin mounting plate connected to the twelfth driving assembly, a thirteenth driving assembly for driving the pin mounting plate to move along the X axis, and a fourteenth driving assembly for driving the pin mounting plate to move along the Z axis; The bowl-shaped plug pressing device includes a fifth tray supporting the housing, a fifteenth driving assembly driving the fifth tray to move along the Y axis, a third wedging assembly fixing the housing, a workpiece top surface pressing mechanism, a sixteenth driving assembly driving the workpiece top surface pressing mechanism to move along the Z axis, and a bowl-shaped plug feeder; The shaft gear pressing device includes a material bin, a seventeenth driving assembly for driving the material in the material bin to move along the Z axis, a clamping mechanism for grabbing the material, an eighteenth driving assembly for driving the clamping mechanism to move along the Z axis, a nineteenth driving assembly for driving the clamping mechanism to move along the Y axis, a sixth tray for supporting the material, a twentieth assembly for driving the sixth tray to move along the Y axis, a top block mechanism for pushing the material on the sixth tray into the workpiece, a twenty-first driving assembly for driving the top block mechanism to move along the X axis, a twenty-second driving assembly for driving the top block mechanism to move along the Y axis, a twenty-third driving assembly for driving the top block mechanism to move along the Z axis, a seventh tray for supporting the workpiece, a twenty-fourth driving assembly for driving the seventh tray to move along the Y axis, and a workpiece clamping mechanism for fixing the workpiece; The detection equipment includes a stator height detection machine, which is provided with an eighth tray supporting a shell, a twenty-fifth driving assembly driving the eighth tray to move along the Z axis, a twenty-sixth driving assembly driving the eighth tray to move along the X axis, a measuring mechanism, and a twenty-seventh driving assembly driving the measuring mechanism to move along the Z axis.

2. The motor assembly line according to claim 1, characterized in that: The truss is provided with a workpiece clamp, and the first drive assembly and the second drive assembly are both gear rack transmission structures driven by motors.

3. The motor assembly line according to claim 1, characterized in that: The mounting frame is provided with four groups of shell heating mechanisms, and the shell heating mechanisms include two groups of heating coils and two groups of auxiliary heating coils arranged along the Y-axis direction, and the inner diameters of the two groups of heating coils are different.

4. The motor assembly line according to claim 1, characterized in that: The steel ball pressing device also includes a steel ball pressing frame, the steel ball pressing mechanism and the pin pressing mechanism are arranged on both sides of the steel ball pressing frame along the X-axis direction, and the third tray and the fourth tray are both provided with a pressing plate for fixing the workpiece; the first wedging assembly includes a plurality of groups of first wedging units, the first wedging unit includes a first push rod and a first cylinder driving the first push rod to move along the Y-axis, and the first cylinder is fixed on the steel ball pressing frame; the second wedging assembly includes a plurality of groups of second wedging units, the second wedging unit includes a second push rod and a second cylinder driving the second push rod to move along the Y-axis, and the second cylinder is fixed on the steel ball pressing frame.

5. The motor assembly line according to claim 1, characterized in that: The bowl-shaped plug pressing device also includes a bowl-shaped plug pressing frame, the third wedging assembly includes a plurality of third wedging units, the third wedging unit includes a third push rod and a third cylinder driving the third push rod to move along the X-axis, and the third cylinder is fixed on the bowl-shaped plug pressing frame.

6. The motor assembly line according to claim 5, characterized in that: A steel ball pressing assembly is provided on the bowl-shaped plug pressing machine frame, and the steel ball pressing assembly is arranged on the opposite side of the third wedge tightening assembly. The steel ball pressing assembly includes a steel ball ram and a steel ball ram press that drives the steel ball ram to move along the X-axis.

7. The motor assembly line according to claim 1, characterized in that: The shaft gear pressing device also includes a shaft gear pressing frame and a turntable arranged at the tail of the shaft gear pressing frame, the material bin is arranged on the turntable evenly distributed in a circle, the clamping mechanism includes two locating pin clamps and two bearing clamps arranged between the locating pin clamps; two groups of bearing pressure heads and locating pin pressure heads are arranged on the sixth pallet, and the bottoms of the bearing pressure heads and the locating pin pressure heads are respectively provided with a bearing top sleeve and a locating pin top sleeve that pass through the sixth pallet; the head of the shaft gear pressing frame is provided with a buffer to reduce the collision with the seventh pallet.

8. The motor assembly line according to claim 1, characterized in that: The main conveyor belt includes a first conveyor section, a second conveyor section and a third conveyor section. The first conveyor section is arranged below the truss and is connected to one end of the second conveyor section through a first elevator. The second conveyor section is connected to the third conveyor section through a second elevator. The third conveyor section is arranged above the second conveyor section.

9. The motor assembly line according to claim 8, characterized in that: The cooling device comprises a cooling furnace, and the second transport section and the third transport section pass through the cooling furnace.

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