A small motor automatic assembly and welding production line

Abstract

The invention discloses a small motor automatic assembly welding production line, which belongs to the field of motor assembly equipment. The small motor automatic assembly welding production line of the invention comprises a frame, a circulating conveyor line, a base discharge device, a stator press-fitting device and a welding device. The circulating conveyor line comprises a conveyor line bracket, an upper circulation conveying mechanism, a lower circulation conveying mechanism, a tooling lowering conversion mechanism, a tooling lifting conversion mechanism and a circulation tooling. The circulation tooling can circulate on the upper circulation conveying mechanism, and the vacant circulation tooling can automatically flow back to the initial loading station of the production line for reuse, thereby realizing the automatic circulation and assembly of the motor stator and the motor base at each assembly station; and a base pin stamping mechanism is designed in the base discharge device, which can perform punching and bending of the base pins, thereby ensuring the stability of the subsequent press-fitting and welding of the motor stator and the motor base, greatly improving the production efficiency and quality stability, and reducing the production cost.

Description

Technical Field

[0001] The invention relates to a motor manufacturing device, and more particularly to an automatic assembly and welding production line for small motors. Background Art

[0002] Figure 1 and Figure 2 This is an existing small motor, which is widely used in vehicle systems. The structural feature of this small motor is that the coil is wound on the stator, mainly including a coil support A1, a coil, a rotor A2, a bearing A3, a base A4 and a shielding shell A5. The coil support A1 is made of plastic material, and a winding groove A1-1 is provided on the coil support A1. The coil is wound in the winding groove A1-1 of the coil support A1 to form a stator. The rotor A2 is sleeved with a bearing A3 and installed together in the inner hole of the coil support A1. The base A4 is press-fitted and fixed on the tail of the coil support A1, and has a wiring port A4-1 and a metal pin A4-2. After the base A4 and the coil support A1 are assembled, the metal pin A4-2 is connected to the lead of the coil. The shielding shell A5 is installed on the coil support A1 to protect the coil.

[0003] The coil support A1 and the base A4 of the above-mentioned small motor are connected by a snap-fit ​​structure, and the two are press-fitted together. It can be seen from the structural characteristics of the above-mentioned small motor that after the coil support A1 is connected to the base A4, it is necessary to ensure that the metal pin A4-2 on the base A4 corresponds one-to-one with the metal pin A1-2 on the coil support A1, and then the circuit is welded. The difficulty of this assembly welding is to ensure the accurate alignment of the metal pin A4-2 and the metal pin A1-2 to improve the accuracy of subsequent welding. Although manual assembly can flexibly adjust the positional relationship between the coil support A1 and the base A4 to ensure the accuracy of the welding position, the production efficiency is very low, resulting in a high production cost of the motor and a lack of market competitiveness. In addition, the metal pin A4-2 is straight on the base A4, which is easy to collide with the metal pin A1-2 during assembly, causing the metal pin A1-2 to deform, resulting in poor subsequent welding stability. Therefore, before the base and the stator are assembled, the metal pin A4-2 on the base needs to be bent through a stamping process, and the existing manufacturing process needs to be completed through multiple processes on different equipment. The production cycle of parts on different equipment is long and the production efficiency is very low. In order to improve the production efficiency of the motor, it is imperative to develop corresponding automation equipment. Summary of the invention

[0004] 1. Technical problem to be solved by the invention

[0005] The purpose of the present invention is to provide an automatic assembly and welding production line for small motors to solve the shortcomings of low production efficiency and high cost in existing production processes. The technical solution of the present invention is adopted to utilize a circulating conveyor line to realize the recycling of circulation tooling, so that the motor stator and the motor base can be automatically circulated and assembled at each assembly station. At the same time, the punching and bending forming of the pins of the motor base is integrated into the base discharge device, which ensures the stability of subsequent pressing and welding of the motor stator and the motor base, greatly improves the production efficiency and product quality stability of small motors, and reduces the production cost.

[0006] 2. Technical solution

[0007] In order to achieve the above object, the technical solution provided by the present invention is:

[0008] The invention discloses a small motor automatic assembly welding production line, comprising a frame, a circulating conveyor line, a base discharge device, a stator press-fit device and a welding device arranged on the frame, wherein:

[0009] The circulating conveyor line includes a conveyor line bracket, an upper-layer circulation conveying mechanism, a lower-layer circulation conveying mechanism, a tooling descending conversion mechanism, a tooling lifting conversion mechanism and a circulation tooling. The upper-layer circulation conveying mechanism and the lower-layer circulation conveying mechanism are installed on the frame through the conveyor line bracket, and the upper-layer circulation conveying mechanism is located directly above the lower-layer circulation conveying mechanism. The tooling descending conversion mechanism and the tooling lifting conversion mechanism are respectively arranged at the two ends of the upper-layer circulation conveying mechanism and the lower-layer circulation conveying mechanism. The tooling descending conversion mechanism is used to convert the upper-layer circulation conveying mechanism The conveyed transfer tooling is transferred to the lower-level transfer conveying mechanism, and the tooling lifting and conversion mechanism is used to transfer the transfer tooling conveyed by the lower-level transfer conveying mechanism to the upper-level transfer conveying mechanism; the upper-level transfer conveying mechanism has at least a base discharge station and a stator press-fit welding station, and a stop mechanism for blocking the transfer tooling is provided at the front of each station; the transfer tooling is provided with a plurality of positioning grooves for positioning the motor stator and positioning columns for positioning the motor base, and the positioning grooves and the positioning columns are axially arranged opposite to each other;

[0010] The base discharging device is arranged at one side of the base discharging station of the upper circulation conveying mechanism, and includes a base vibration feeding mechanism, a base pin stamping mechanism and a base grabbing and shifting mechanism. The base pin stamping mechanism includes a base arranging groove, an upper punch mounting frame, an upper punch, a lower punching cylinder and a lower punch. The base vibration feeding mechanism is arranged at one side of the base arranging groove, and is used to send the motor base into the base arranging groove in a set position state. The upper punch is fixedly installed above the base arranging groove through the upper punch mounting frame, and the lower punch is installed on the driving end of the lower punching cylinder, and the lower punch is located below the upper punch, and is used to perform punching and bending on the pins on the motor base; the base grabbing and shifting mechanism is arranged at the other side of the base arranging groove, and is used to grab and move the motor base after punching and bending to the circulation tooling on the base discharging station;

[0011] The stator press-fitting device and the welding device are disposed on both sides of the stator press-fitting welding station of the upper circulation conveying mechanism. The stator press-fitting device is used to axially press-fit the motor stator on the circulation tooling moved to the stator press-fitting welding station onto the corresponding motor base; the welding device is used to solder the pins on the motor stator and the motor base after press-fitting.

[0012] Furthermore, the tooling descending conversion mechanism comprises a descending cylinder, a descending positioning seat, a lower-layer tooling pushing bracket, a lower-layer tooling pushing cylinder and a lower-layer tooling pushing plate, the descending positioning seat is installed on the driving end of the descending cylinder, and one end of the descending positioning seat is open toward the upper-layer circulation conveying mechanism or the lower-layer circulation conveying mechanism, the descending cylinder has a lifting stroke starting point for driving the descending positioning seat to switch between the upper-layer circulation conveying mechanism and the lower-layer circulation conveying mechanism, the lower-layer tooling pushing cylinder is installed on one side of the lower-layer circulation conveying mechanism through the lower-layer tooling pushing bracket, and the lower-layer tooling pushing plate is installed on the driving end of the lower-layer tooling pushing cylinder, and is used to push the circulation tooling on the descending positioning seat to the lower-layer circulation conveying mechanism;

[0013] The tooling lifting conversion mechanism includes a lifting cylinder, a lifting positioning seat, an upper tooling pushing bracket, an upper tooling pushing cylinder and an upper tooling pushing plate. The lifting positioning seat is installed on the driving end of the lifting cylinder, and one end of the lifting positioning seat is open toward the upper circulation conveying mechanism or the lower circulation conveying mechanism. The lifting cylinder has a lifting stroke starting point that drives the lifting positioning seat to switch between the lower circulation conveying mechanism and the upper circulation conveying mechanism. The upper tooling pushing cylinder is installed on one side of the upper circulation conveying mechanism through the upper tooling pushing bracket. The upper tooling pushing plate is installed on the driving end of the upper tooling pushing cylinder, and is used to push the circulation tooling on the lifting positioning seat to the upper circulation conveying mechanism.

[0014] Furthermore, the circulation tooling includes a positioning seat bottom plate, a positioning seat, a positioning block and a base positioning block, the positioning seat is fixedly mounted on the positioning seat bottom plate, the positioning grooves are evenly spaced on the positioning seat, the positioning block is mounted on the positioning seat and is located on one side of the corresponding positioning groove, a positioning protrusion is provided on the positioning block, the base positioning block is mounted on the positioning seat bottom plate and is located on the other side of the corresponding positioning groove, and the positioning column is arranged on the upper part of the base positioning block.

[0015] Furthermore, the base vibration feeding mechanism includes a base vibration disk, a base conveying slide, a base linear vibrator, a base feeding cylinder, a base feeding push plate, a base pushing cylinder and a base pushing block, the base conveying slide is installed on the base linear vibrator, the discharge port of the base vibration disk is connected with one end of the base conveying slide, and the other end of the base conveying slide is staggered with the base arrangement slot; the base feeding push plate is located between the base conveying slide and the base arrangement slot, and the base feeding push plate has a transition slot that can accommodate a motor base, the base feeding push plate is installed on the driving end of the base feeding cylinder, and is driven by the base feeding cylinder to switch between the discharge end of the base conveying slide and the feeding end of the base arrangement slot; the base pushing block is installed at the driving end of the base pushing cylinder, and the telescopic movement direction of the base pushing block is consistent with the length direction of the base arrangement slot, which is used to push the motor base in the transition slot of the base feeding push plate into the base arrangement slot.

[0016] Furthermore, the base grabbing and shifting mechanism includes a base front and rear shifting driver, a base lateral shifting cylinder, a base grabbing and lifting cylinder and a base grabbing pneumatic finger claw. The base front and rear shifting driver is installed on the frame front and rear through a bracket, the base lateral shifting cylinder is horizontally installed laterally on the driving end of the base front and rear shifting driver, the base grabbing and lifting cylinder is installed on the driving end of the base lateral shifting cylinder through a connecting plate, and the base grabbing and lifting cylinder is installed on the driving end of the base grabbing and lifting cylinder.

[0017] Furthermore, the stator press-fitting device includes a press-fitting cylinder bracket, a stator press-fitting cylinder and a base baffle, the press-fitting cylinder bracket is arranged on a side close to the positioning groove on the circulation tooling, the stator press-fitting cylinders are arranged side by side on the press-fitting cylinder bracket, and the number of stator press-fitting cylinders is consistent with the number of positioning grooves on the circulation tooling, the driving end of each stator press-fitting cylinder has a pressure head for pushing the motor stator, and the base baffle is arranged on a side close to the positioning column on the circulation tooling, and is used to limit the rear end of the motor base on the circulation tooling.

[0018] Furthermore, the welding device includes a welding head shift driver, a welding head lifting driver, a welding head mounting plate and a soldering head. The welding head shift driver is installed on the frame front and back through a bracket, the welding head lifting driver is vertically installed on the driving end of the welding head shift driver, the welding head mounting plate is fixed on the driving end of the welding head lifting driver, and the soldering head is arranged in two groups in parallel on the welding head mounting plate.

[0019] Furthermore, it also includes a shell assembly device, which includes a shell feeding mechanism, a shell grabbing and installing mechanism and a base grabbing mechanism, the end of the shell feeding mechanism is provided with a shell limit block, the shell grabbing and installing mechanism has a shell pneumatic clamping jaw capable of rotating and telescopic movement, the shell pneumatic clamping jaw is located above the shell limit block, the base grabbing mechanism has a grabbing pneumatic finger claw capable of moving forward and backward and lifting and lowering movement, the grabbing pneumatic finger claw is located directly above the tooling descending conversion mechanism;

[0020] During operation, the pneumatic gripping claw grabs the motor base with the motor stator pressed on it from the flow tooling on the tooling descending conversion mechanism, and moves it to the pneumatic gripper of the outer shell; the pneumatic gripper of the outer shell grabs the motor outer shell from the outer shell limit block, and after rotating it 90°, puts the motor outer shell onto the motor stator; the assembled motor is moved to the motor unloading station by the pneumatic gripping claw.

[0021] Furthermore, the shell feeding mechanism also includes a shell feeding vibration plate, a shell conveying slide and a shell linear vibrator, the shell conveying slide is installed on the shell linear vibrator, one end of the shell conveying slide is connected with the discharge port of the shell feeding vibration plate, and the other end of the shell conveying slide is connected with the shell limit block; the shell grabbing and mounting mechanism also includes a raised plate, a grabbing rotating cylinder, a shell telescopic assembly cylinder, a rotation limit plate and a positioning baffle, the grabbing rotating cylinder is installed on the raised plate, the shell telescopic assembly cylinder is installed on the driving end of the grabbing rotating cylinder, and the shell gas The dynamic clamp is installed on the driving end of the telescopic assembly cylinder of the shell, and the rotation limit plate is fixed on the elevated plate, which is used to limit the rotation of the telescopic assembly cylinder of the shell to a vertical position. The positioning baffle is installed on the cylinder sleeve of the pneumatic clamp of the shell, and is used to position it with the stator end when the shell is assembled; the base grasping mechanism also includes a grasping front and rear shifting driver and a lifting grasping cylinder. The grasping front and rear shifting driver is installed on the frame through a bracket, and the lifting grasping cylinder is installed on the driving end of the grasping front and rear shifting driver, and the grasping pneumatic fingers are installed on the driving end of the lifting grasping cylinder.

[0022] Furthermore, a detection device is provided between the welding device and the shell assembly device, the detection device comprising a camera and a detection shift mechanism, the camera being arranged directly above the upper-level circulation conveying mechanism for detecting the pin welding quality between the motor stator and the motor base; the detection shift mechanism comprising a shift cylinder, a blocking cylinder and a shift baffle, the shift baffle being installed on the driving end of the blocking cylinder for driving the shift baffle to telescope in the direction of the upper-level circulation conveying mechanism; the blocking cylinder being installed on the driving end of the shift cylinder for driving the shift baffle to telescope along the length direction of the upper-level circulation conveying mechanism; the shift cylinder and the blocking cylinder drive the shift baffle to control the intermittent movement of the circulation tooling on the upper-level circulation conveying mechanism to switch between different detection positions.

[0023] 3. Beneficial effects

[0024] Compared with the existing known technologies, the technical solution provided by the present invention has the following significant effects:

[0025] (1) The automatic assembly and welding production line of a small motor of the present invention comprises a frame, a circulating conveyor line arranged on the frame, a base discharge device, a stator pressing device and a welding device. The circulating conveyor line comprises a conveyor line bracket, an upper circulation conveying mechanism, a lower circulation conveying mechanism, a tooling lowering conversion mechanism, a tooling lifting conversion mechanism and a circulation tooling. The circulation tooling can be circulated and assembled at different assembly stations on the upper circulation conveying mechanism. The vacant circulation tooling can be automatically returned to the initial loading station of the production line through the lower circulation conveying mechanism for reuse, thereby realizing the automatic circulation and assembly of the motor stator and the motor base at each assembly station; and a base pin stamping mechanism is designed in the base discharge device, which can bend and form the base pins, so that the base pins are bent upward, thereby ensuring the stability of the subsequent pressing and welding of the motor stator and the motor base, solving the problems of low production efficiency and high cost of the existing production process, greatly improving the production efficiency and product quality stability of small motors, and reducing the production cost;

[0026] (2) The automatic assembly and welding production line for small motors of the present invention has a tool lowering conversion mechanism and a tool lifting conversion mechanism that both use a lifting cylinder to drive a positioning seat to achieve the lifting of the circulating tool, and at the same time use a pushing cylinder and a tool pushing plate to achieve the pushing of the circulating tool on the upper and lower layers of the circulating conveying mechanism. The structural design is simple and compact, and the conveying of the circulating tool is stable and reliable;

[0027] (3) The automatic assembly welding production line of a small motor of the present invention comprises a flow tooling including a positioning seat bottom plate, a positioning seat, a positioning block and a base positioning block. The positioning seat is provided with a plurality of positioning grooves at equal intervals. A positioning block for positioning the stator is provided on one side of the positioning groove, and a base positioning block installed on the positioning seat bottom plate is provided on the other side. The flow tooling design can accurately position the motor stator and the motor base, facilitating accurate and stable press-fitting of the two. At the same time, the motor stator pins and the motor base pins are accurately positioned after press-fitting, facilitating subsequent automated soldering connection.

[0028] (4) The automatic assembly and welding production line for small motors of the present invention has a base vibration feeding mechanism that adopts a staggered design between the base conveying slide and the base arrangement slot, and utilizes a base feeding push plate to telescopically move between the base conveying slide and the base arrangement slot, so that one motor base on the base conveying slide can be conveyed to the feeding end of the base arrangement slot each time, and the base pushing block is used to push the base into the base arrangement slot, so that the motor base can be neatly arranged in the base arrangement slot, accurately positioned, conveniently and accurately punching and bending the pins, and improving the position accuracy of the base grabbing and shifting mechanism to move the motor base to the flow tooling, which is beneficial to improving the stability of the entire base discharging action;

[0029] (5) The automatic assembly and welding production line for small motors of the present invention has a pneumatic finger of a base grabbing and shifting mechanism that can move forward and backward, sideways, and up and down, and can realize continuous installation of multiple motor bases on a flow tooling, and the base grabbing and placement actions are stable and accurate;

[0030] (6) The stator press-fitting device of the small motor automatic assembly welding production line of the present invention includes a press-fitting cylinder bracket, a stator press-fitting cylinder and a base baffle. The stator press-fitting cylinders are arranged side by side on the press-fitting cylinder bracket, and the number of stator press-fitting cylinders is consistent with the number of positioning grooves on the flow tooling. Each group of motor stators and motor bases are assembled using a group of stator press-fitting cylinders. The press-fitting actions of each group are relatively independent, avoiding press-fitting failures caused by inaccurate positioning of some motor stators and motor bases, thereby improving press-fitting reliability;

[0031] (7) The small motor automatic assembly welding production line of the present invention, the welding device thereof comprises a welding head shifting driver, a welding head lifting driver, a welding head mounting plate and a soldering welding head, two groups of soldering welding heads are arranged in parallel on the welding head mounting plate, the two groups of soldering welding heads can move synchronously, and the welding of two motors can be realized each time, which greatly improves the welding efficiency;

[0032] (8) The automatic assembly and welding production line for small motors of the present invention also includes a shell assembly device, which includes a shell feeding mechanism, a shell grabbing and installing mechanism, and a base grabbing mechanism. The base grabbing mechanism can move the motor base with the motor stator pressed onto it to the shell grabbing and installing mechanism. The shell grabbing and installing mechanism can grab the shell from the shell feeding mechanism and rotate it 90° to insert it onto the motor stator. The assembly action is simple and stable. After the assembly is completed, the assembled motor can be transferred to the unloading station by the base grabbing mechanism. The action is continuous and efficient.

[0033] (9) The small motor automatic assembly welding production line of the present invention also has a detection device between the welding device and the shell assembly device. The detection device includes a camera and a detection shift mechanism. The detection shift mechanism can control the intermittent movement of the flow tooling on the upper flow conveying mechanism to switch different detection positions. The camera can identify the welding quality through images, which is convenient for timely detection of defective products and ensures the product production qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The figure is a schematic diagram of the split structure of an existing small motor;

[0035] Figure 2 It is a schematic diagram of the overall structure of an existing small motor;

[0036] Figure 3 It is a three-dimensional structural schematic diagram of a small motor automatic assembly welding production line of the present invention;

[0037] Figure 4 It is a schematic diagram of the three-dimensional structure of the circulating conveying line in the present invention;

[0038] Figure 5 It is a structural schematic diagram of the tooling lowering conversion mechanism and the tooling lifting conversion mechanism in the present invention in the circulating conveying line;

[0039] Figure 6 It is a structural schematic diagram of the flow tooling in the present invention;

[0040] Figure 7 It is a schematic diagram of the three-dimensional structure of the base discharging device in the present invention;

[0041] Figure 8 It is a schematic diagram of the positional relationship of the stator press-fitting device, the welding device, the detection device and the housing assembly device in the present invention;

[0042] Fig. 9 It is a three-dimensional structural schematic diagram of the stator press-fitting device and the welding device in the present invention;

[0043] Fig.10 It is a schematic diagram of the three-dimensional structure of the housing assembly device in the present invention.

[0044] Explanation of the symbols in the schematic diagram:

[0045] A1, coil support; A1-1, winding groove; A1-2, metal pin; A2, rotor; A3, bearing; A4, base; A4-1, wiring port; A4-2, metal pin; A5, shielding shell;

[0046] 100, rack;

[0047] 200, circulating conveyor line; 21, conveyor line bracket; 22, upper layer circulation conveying mechanism; 23, lower layer circulation conveying mechanism; 24, tooling descending conversion mechanism; 241, descending cylinder; 242, descending positioning seat; 243, lower layer tooling pushing bracket; 244, lower layer tooling pushing cylinder; 245, lower layer tooling push plate; 25, tooling lifting conversion mechanism; 251, lifting cylinder; 252, lifting positioning seat; 253, upper layer tooling pushing bracket; 254, upper layer tooling pushing cylinder; 255, upper layer tooling push plate; 26, stop mechanism; 261, stop cylinder; 262, stop rod; 27, circulation tooling; 271, positioning seat bottom plate; 272, positioning seat; 272a, positioning groove; 273, positioning block; 273a, positioning protrusion; 274, base positioning block; 274a, positioning column;

[0048] 300, base discharging device; 31, base vibrating feeding mechanism; 311, base vibrating plate; 312, base conveying slide; 313, base linear vibrator; 314, base feeding cylinder; 315, base feeding push plate; 316, base pushing cylinder; 317, base pushing block; 32, base pin stamping mechanism; 321, base arrangement groove; 322, upper punch mounting frame; 323, upper punch; 324, lower punch cylinder; 325, lower punch; 33, base grabbing and shifting mechanism; 331, base front and rear shifting driver; 332, base lateral shifting cylinder; 333, base grabbing and lifting cylinder; 334, base grabbing pneumatic finger claw;

[0049] 400, stator press-fit device; 401, press-fit cylinder bracket; 402, stator press-fit cylinder; 403, base baffle;

[0050] 500, welding device; 501, welding head shift driver; 502, welding head lifting driver; 503, welding head mounting plate; 504, soldering welding head;

[0051] 600, detection device; 61, camera; 62, detection shift mechanism; 621, shift cylinder; 622, blocking cylinder; 623, shift baffle;

[0052] 700, shell assembly device; 71, shell feeding mechanism; 711, shell conveying slide; 712, shell linear vibrator; 713, limit block mounting plate; 714, shell limit block; 72, shell grabbing and mounting mechanism; 721, elevated plate; 722, grabbing and rotating cylinder; 723, shell telescopic assembly cylinder; 724, shell pneumatic clamp; 725, rotating limit plate; 726, positioning baffle; 73, base grabbing mechanism; 731, grabbing front and rear shifting driver; 732, lifting grabbing cylinder; 733, grabbing pneumatic finger claw;

[0053] 800. Stator and rotor assembly mechanism. DETAILED DESCRIPTION

[0054] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0055] [Example]

[0056] A small motor automatic assembly welding production line of this embodiment is used for Figure 1 and Figure 2 The stator (coil support A1 with coil wound on it) of the small motor is pressed and pin-welded with the base A4, and the stator is assembled with the shielding shell A5. Figure 3 As shown, the automatic assembly and welding production line of small motors includes a frame 100, a circulating conveyor line 200, a base discharge device 300, a stator press-fit device 400 and a welding device 500 respectively arranged on the frame 100. The frame 100 serves as the installation base of the entire production line. In order to facilitate transportation, the frame can be composed of a plurality of independent frames; the circulating conveyor line 200 is used for positioning and conveying the motor stator and the motor base; the base discharge device 300 is used for loading the motor base, and the stator press-fit device 400 is used for press-fitting the motor stator and the motor base so that the two are assembled together; the welding device 500 is used for welding the pins on the motor stator and the pins on the motor base so that the coil leads are connected to the corresponding metal pins A4-2 in the wiring port A4-1 on the motor base. Among them:

[0057] like Figure 4As shown, the above-mentioned circulating conveyor line 200 includes a conveyor line bracket 21, an upper-layer circulation conveying mechanism 22, a lower-layer circulation conveying mechanism 23, a tooling descending conversion mechanism 24, a tooling lifting conversion mechanism 25 and a circulation tooling 27. The upper-layer circulation conveying mechanism 22 and the lower-layer circulation conveying mechanism 23 are installed on the frame 100 through the conveyor line bracket 21, and the upper-layer circulation conveying mechanism 22 is located directly above the lower-layer circulation conveying mechanism 23. The upper-layer circulation conveying mechanism 22 and the lower-layer circulation conveying mechanism 23 are preferably parallel to each other, and the tooling descending conversion mechanism The tooling lifting and conversion mechanism 24 and the tooling lifting and conversion mechanism 25 are respectively arranged at the two ends of the upper-layer circulation conveying mechanism 22 and the lower-layer circulation conveying mechanism 23. The tooling lowering and conversion mechanism 24 is used to transfer the circulation tooling 27 conveyed from the upper-layer circulation conveying mechanism 22 to the lower-layer circulation conveying mechanism 23, and the tooling lifting and conversion mechanism 25 is used to transfer the circulation tooling 27 conveyed from the lower-layer circulation conveying mechanism 23 to the upper-layer circulation conveying mechanism 22, so that the circulation route of the circulation tooling 27 can form a complete cycle, so that the circulation tooling 27 can be reused. The upper-layer circulation conveying mechanism 22 has at least a base discharge station and a stator press-fit welding station, and a stop mechanism 26 for blocking the circulation tooling 27 is provided at the front of each station, and the stop mechanism 26 can make the circulation tooling 27 stay at the corresponding assembly station. The transfer tool 27 is provided with a plurality of positioning grooves 272a for positioning the motor stator and positioning columns 274a (such as Figure 6 As shown), the positioning groove 272a and the positioning column 274a are axially arranged opposite to each other, so that it is convenient to press and fix the motor stator on the positioning groove 272a and the motor base on the positioning column 274a together.

[0058] Specifically, the upper layer transfer conveying mechanism 22 and the lower layer transfer conveying mechanism 23 are both conveyor belt mechanisms, and the conveyor belts are driven by conveying motors. The conveying directions of the upper layer transfer conveying mechanism 22 and the lower layer transfer conveying mechanism 23 are opposite. The upper layer transfer conveying mechanism 22 is used for transfer between various assembly stations, and the lower layer transfer conveying mechanism 23 is used for the return of the transfer tooling 27. Figure 5As shown, the above-mentioned tooling descending conversion mechanism 24 includes a descending cylinder 241, a descending positioning seat 242, a lower-layer tooling pushing bracket 243, a lower-layer tooling pushing cylinder 244 and a lower-layer tooling pushing plate 245. The descending positioning seat 242 is installed on the driving end of the descending cylinder 241, and one end of the descending positioning seat 242 is open toward the upper-layer circulation conveying mechanism 22 or the lower-layer circulation conveying mechanism 23. The descending cylinder 241 has a lifting and lowering stroke starting point for driving the descending positioning seat 242 to switch between the upper-layer circulation conveying mechanism 22 and the lower-layer circulation conveying mechanism 23. When the descending positioning seat 242 rises to the height of the upper-layer circulation conveying mechanism 22, the circulation tooling 27 on the upper-layer circulation conveying mechanism 22 can directly enter the descending positioning seat 242, and the descending positioning seat 242 is driven by the descending cylinder 241 to descend to the height of the lower-layer circulation conveying mechanism 23. The lower tooling push cylinder 244 is installed on one side of the lower flow conveying mechanism 23 through the lower tooling push bracket 243, and the lower tooling push plate 245 is installed on the driving end of the lower tooling push cylinder 244, so that the height of the lower tooling push plate 245 corresponds to the height of the lower flow conveying mechanism 23, and is used to push the flow tooling 27 on the descending positioning seat 242 to the lower flow conveying mechanism 23. Thus, the tooling descending conversion mechanism 24 realizes the transfer of the flow tooling 27 from the upper flow conveying mechanism 22 to the lower flow conveying mechanism 23. The above-mentioned tooling lifting conversion mechanism 25 includes a lifting cylinder 251, a lifting positioning seat 252, an upper tooling pushing bracket 253, an upper tooling pushing cylinder 254 and an upper tooling pushing plate 255. The lifting positioning seat 252 is installed on the driving end of the lifting cylinder 251, and one end of the lifting positioning seat 252 is open toward the upper circulation conveying mechanism 22 or the lower circulation conveying mechanism 23. The lifting cylinder 251 has a lifting stroke starting point for driving the lifting positioning seat 252 to switch between the lower circulation conveying mechanism 23 and the upper circulation conveying mechanism 22. When the lifting positioning seat 252 descends to the height of the lower circulation conveying mechanism 23, the circulation tooling 27 on the lower circulation conveying mechanism 23 can directly enter the lifting positioning seat 252, and the lifting cylinder 251 drives the lifting positioning seat 252 to rise to the height of the upper circulation conveying mechanism 22. The upper tooling push cylinder 254 is installed on one side of the upper flow conveying mechanism 22 through the upper tooling push bracket 253, and the upper tooling push plate 255 is installed on the driving end of the upper tooling push cylinder 254, so that the height of the upper tooling push plate 255 corresponds to the height of the upper flow conveying mechanism 22, and is used to push the flow tooling 27 on the lifting positioning seat 252 to the upper flow conveying mechanism 22. Thus, the tooling lifting conversion mechanism 25 realizes the transfer of the flow tooling 27 from the lower flow conveying mechanism 23 to the upper flow conveying mechanism 22. The above-mentioned tooling lowering conversion mechanism 24 and tooling lifting conversion mechanism 25 are simple and compact in structure design, and the flow tooling transportation is stable and reliable.

[0059] like Figure 6 As shown, in this embodiment, the above-mentioned flow tooling 27 includes a positioning seat bottom plate 271, a positioning seat 272, a positioning block 273 and a base positioning block 274. The positioning seat 272 is fixedly mounted on the positioning seat bottom plate 271, and the positioning grooves 272a are evenly spaced on the positioning seat 272. The positioning grooves 272a can be evenly spaced on the positioning seat 272 to maintain a matching relationship with the previous coil winding process. The stator is composed of a coil support wound with a coil, which can be positioned in the corresponding positioning groove 272a. The positioning block 273 is mounted on the positioning seat 272 and is located on one side of the corresponding positioning groove 272a. The positioning block 273 is provided with a positioning protrusion 273a, which can be inserted into the open groove at the front end of the coil support to prevent the stator from changing its angle. The base positioning block 274 is installed on the positioning seat bottom plate 271 and is located on the other side of the corresponding positioning groove 272a. The positioning column 274a is arranged on the upper part of the base positioning block 274. The positioning column 274a can be positioned and matched with the wiring port on the motor base. The use of this flow tooling design can accurately position the motor stator and the motor base, facilitating accurate and stable press-fitting of the two; at the same time, the motor stator pins and the motor base pins after press-fitting are accurately positioned, facilitating subsequent automated soldering connection.

[0060] The above-mentioned stop mechanism 26 can be installed on the conveyor line support 21. Figure 7 As shown, the stop mechanism 26 includes a stop cylinder 261 and a stop rod 262 arranged at the driving end of the stop cylinder 261. The stop rod 262 can extend into the conveying path of the upper flow conveying mechanism 22 under the control of the stop cylinder 261 to block the flow tooling 27, and can also retract and release the flow tooling 27 to allow it to continue to flow to the subsequent process.

[0061] like Figure 7As shown in the figure, the above-mentioned base discharging device 300 is arranged on one side of the base discharging station of the upper-layer transfer conveyor mechanism 22, and includes a base vibrating feeding mechanism 31, a base pin stamping mechanism 32, and a base grasping and shifting mechanism 33. The base pin stamping mechanism 32 includes a base arranging groove 321, an upper punch mounting frame 322, an upper punch 323, a lower stamping cylinder 324, and a lower punch 325. The base vibrating feeding mechanism 31 is arranged on one side of the base arranging groove 321 and is used to feed the motor base into the base arranging groove 321 in a set position state, with the pins on the motor base facing upward and facing the upper-layer transfer conveyor mechanism 22. The overall cross-sectional shape of the base arranging groove 321 is "凵"-shaped, and it has two positions, namely, the bending position and the grasping position, along the length direction. At the bending position, the upper punch 323 is fixedly installed above the base arranging groove 321 through the upper punch mounting frame 322, the lower punch 325 is installed on the driving end of the lower stamping cylinder 324, and the lower punch 325 is located below the upper punch 323 and is used to bend the pins on the motor base into shape. During the bending process, the upper punch 323 remains stationary. At this time, the pins on the motor base are located near the lower part of the upper punch. The lower stamping cylinder 324 drives the lower punch 325 to move upward, so that the upper and lower punches are pressed against each other, and then the originally straight pins are bent by using the shape of the punch end to form an upward bulge. The base grasping and shifting mechanism 33 is arranged on the other side of the base arranging groove 321 and can grasp the motor base at the grasping position of the base arranging groove 321 and is used to grasp and move the motor base after bending to the transfer tooling 27 at the base discharging station.

[0062] Connect Figure 7As shown, in this embodiment, the above-mentioned base vibration feeding mechanism 31 includes a base vibrating disk 311, a base conveying chute 312, a base linear vibrator 313, a base feeding cylinder 314, a base feeding push plate 315, a base pushing cylinder 316 and a base pushing block 317. The cross-sectional shape of the base conveying chute 312 is also "U"-shaped. The base conveying chute 312 is installed on the base linear vibrator 313. The discharge port of the base vibrating disk 311 is connected to one end of the base conveying chute 312, so that the motor base enters the base conveying chute 312 with the pins facing up after being screened by the base vibrating disk 311 and is conveyed forward under the action of the base linear vibrator 313; the other end of the base conveying chute 312 is offset from the base arranging groove 321, and there is no direct contact between the two to prevent vibration from being transmitted into the base arranging groove 321; the base feeding push plate 315 is located between the base conveying chute 312 and the base arranging groove 321, and the base feeding push plate 315 has a transition groove capable of accommodating one motor base, and the cross-sectional shape of the transition groove is also "U"-shaped. The base feeding push plate 315 is installed on the driving end of the base feeding cylinder 314 and is driven by the base feeding cylinder 314 to switch between the discharge end of the base conveying chute 312 and the feeding end of the base arranging groove 321. When the transition groove corresponds to the discharge end of the base conveying chute 312, one motor base enters the transition groove. At this time, the base feeding cylinder 314 drives the base feeding push plate 315 to move towards the base arranging groove 321, so that the transition groove corresponds to the feeding end of the base arranging groove 321, thereby transferring one motor base to the position of the base arranging groove 321. The base pushing block 317 is installed on the driving end of the base pushing cylinder 316, and the telescopic movement direction of the base pushing block 317 is consistent with the length direction of the base arranging groove 321, and is used to push the motor base in the transition groove of the base feeding push plate 315 into the base arranging groove 321. By adopting the above-mentioned base vibration feeding mechanism 31, the base conveying chute 312 and the base arranging groove 321 are designed to be offset. The base feeding push plate 315 makes telescopic movement between the base conveying chute 312 and the base arranging groove 321, so that each time one motor base on the base conveying chute 312 can be conveyed to the feeding end of the base arranging groove 321, and the base pushing block 317 is used to push the base into the base arranging groove 321, so that the motor bases can be neatly arranged and accurately positioned in the base arranging groove 321, which is convenient for accurately bending the pins, improving the position accuracy of the base grasping and shifting mechanism 33 to move the motor base to the transfer tooling, and is beneficial to improving the stability of the entire base discharging action.The above-mentioned base grabbing and shifting mechanism 33 includes a base front and rear shifting driver 331, a base lateral shifting cylinder 332, a base grabbing and lifting cylinder 333 and a base grabbing pneumatic finger 334. The base front and rear shifting driver 331 can adopt a linear drive module, which has the advantages of high position control accuracy. The base front and rear shifting driver 331 is installed on the frame 100 front and back through a bracket, the base lateral shifting cylinder 332 is horizontally installed laterally on the driving end of the base front and rear shifting driver 331, the base grabbing and lifting cylinder 333 is installed on the driving end of the base lateral shifting cylinder 332 through a connecting plate, and the base grabbing and pneumatic finger 334 is installed on the driving end of the base grabbing and lifting cylinder 333. The base grabbing and lifting cylinder 333 is used to drive the base grabbing pneumatic fingers 334 to move up and down, and cooperate with the base grabbing pneumatic fingers 334 to grab the motor base. The base lateral shift cylinder 332 is used to drive the motor base to move above the circulation tooling 27, so as to transfer the base in the base arrangement groove 321 to the circulation tooling 27. The base front and rear shift driver 331 is used to drive the base grabbing pneumatic fingers 334 to move forward and backward, so as to place the motor base on each base positioning block 274 of the circulation tooling 27, so as to realize the continuous installation of multiple motor bases on the circulation tooling 27, and the base grabbing and placement actions are stable and accurate.

[0063] Reference Figure 3 and Figure 8 As shown, the stator press-fitting device 400 and the welding device 500 are disposed on both sides of the stator press-fitting welding station of the upper transfer conveying mechanism 22. The stator press-fitting device 400 is used to axially press-fit the motor stator on the transfer tooling 27 moved to the stator press-fitting welding station onto the corresponding motor base; the welding device 500 is used to solder the pins on the motor stator and the motor base after press-fitting. Specifically, as Fig. 9As shown, the stator press-fitting device 400 includes a press-fitting cylinder bracket 401, a stator press-fitting cylinder 402 and a base baffle 403. The press-fitting cylinder bracket 401 is arranged on a side close to the positioning groove 272a on the circulation tooling 27. The stator press-fitting cylinders 402 are arranged side by side on the press-fitting cylinder bracket 401, and the number of stator press-fitting cylinders 402 is consistent with the number of positioning grooves 272a on the circulation tooling 27. The driving end of each stator press-fitting cylinder 402 has a pressure head for pushing the motor stator. The base baffle 403 is arranged on a side close to the positioning column 274a on the circulation tooling 27, and is used to limit the rear end of the motor base on the circulation tooling 27. During the press-fitting process, each stator press-fitting cylinder 402 moves synchronously, driving the pressure head to push the corresponding motor stator into the motor base, and the motor base is supported by the base baffle 403. Each set of motor stators and motor bases are assembled using a set of stator press-fitting cylinders 402. Each set of press-fitting actions is relatively independent, which avoids press-fitting failures due to inaccurate positioning of some motor stators and motor bases, thereby improving press-fitting reliability. The welding device 500 includes a welding head shift driver 501, a welding head lifting driver 502, a welding head mounting plate 503, and a soldering welding head 504. The welding head shift driver 501 can use a linear drive module, which has the advantages of high position control accuracy. The welding head shift driver 501 is installed on the frame 100 front and back through a bracket, the welding head lifting driver 502 is vertically installed on the driving end of the welding head shift driver 501, the welding head mounting plate 503 is fixed on the driving end of the welding head lifting driver 502, and the soldering welding head 504 is provided with two sets in parallel on the welding head mounting plate 503. The welding head shift driver 501 is used to drive the soldering welding head 504 to move along the length direction of the flow tooling 27 to switch different welding positions, and the welding head lifting driver 502 is used to drive the soldering welding head 504 to move up and down to solder the welding position. The two groups of soldering welding heads 504 on the welding head mounting plate 503 can move synchronously, and two motors can be welded each time, which greatly improves the welding efficiency. The above-mentioned soldering welding head 504 can be used in conjunction with a tin breaking machine. The soldering welding head and the tin breaking machine are both existing technologies, and their specific working principles will not be described in detail here.

[0064] like Figure 3 As shown, the small motor automatic assembly welding production line of this embodiment also includes a shell assembly device 700, which is used to install the above-mentioned shielding shell A5 outside the motor stator. Figure 8 and Fig.10As shown, the shell assembly device 700 includes a shell feeding mechanism 71, a shell grabbing and installing mechanism 72 and a base grabbing mechanism 73. A shell limit block 714 is provided at the end of the shell feeding mechanism 71, which is used to position the shell at the shell limit block 714 to facilitate the grabbing of the shell grabbing and installing mechanism 72; the shell grabbing and installing mechanism 72 has a shell pneumatic clamp 724 that can rotate and telescopically move, and the shell pneumatic clamp 724 is located above the shell limit block 714. The shell pneumatic clamp 724 can grab the shell from the shell limit block 714 and rotate it 90° before installing it on the motor stator; the base grabbing mechanism 73 has a grabbing pneumatic finger 733 that can move forward and backward and move up and down, and the grabbing pneumatic finger 733 is located directly above the tooling descending conversion mechanism 24, and can grab the motor base (with the motor stator pressed) in the flow tooling 27 entering the tooling descending conversion mechanism 24, and then move it to the shell grabbing and installing mechanism 72 for assembly. During specific operation, the pneumatic gripping claw 733 grabs the motor base with the motor stator pressed on it from the flow fixture 27 on the fixture descending conversion mechanism 24, and moves it to the shell pneumatic gripper 724; the shell pneumatic gripper 724 grabs the motor shell from the shell limit block 714, and after rotating it 90°, puts the motor shell on the motor stator; the assembled motor is moved to the motor unloading station by the pneumatic gripping claw 733. With the shell assembly device 700, the assembly action is simple and stable, and after the assembly is completed, the assembled motor can be transferred to the unloading station by the base gripping mechanism, and the action is continuous and efficient.

[0065] Specific reference Fig.10As shown, the shell feeding mechanism 71 also includes a shell feeding vibration plate, a shell conveying slide 711 and a shell linear vibrator 712. The shell conveying slide 711 is installed on the shell linear vibrator 712. One end of the shell conveying slide 711 is connected with the discharge port of the shell feeding vibration plate, and the other end of the shell conveying slide 711 is connected with the shell limit block 714. The shell limit block 714 is installed on the frame 100 through the limit block mounting plate 713. The shell feeding vibration plate conveys the shell (i.e., the shielding shell A5) with the opening facing the shell to the shell conveying slide 711, and the shell is conveyed to the shell limit block 714 by the shell linear vibrator 712. The shell grabbing and mounting mechanism 72 also includes an elevated plate 721, a grabbing and rotating cylinder 722, a shell telescopic assembly cylinder 723, a rotation limit plate 725 and a positioning baffle 726. The grabbing and rotating cylinder 722 is mounted on the elevated plate 721, the shell telescopic assembly cylinder 723 is mounted on the driving end of the grabbing and rotating cylinder 722, the shell pneumatic clamp 724 is mounted on the driving end of the shell telescopic assembly cylinder 723, the rotation limit plate 725 is fixed on the elevated plate 721, and is used to limit the rotation of the shell telescopic assembly cylinder 723 to a vertical position, and the positioning baffle 726 is installed on the cylinder sleeve of the shell pneumatic clamp 724, and is used to position it with the stator end when the shell is assembled. During operation, the grabbing and rotating cylinder 722 drives the shell pneumatic clamp 724 downward, and the shell telescopic assembly cylinder 723 drives the shell pneumatic clamp 724 downward to grab the shell on the shell limit block 714, and then the shell telescopic assembly cylinder 723 drives the shell pneumatic clamp 724 to retract upward, and at the same time, the grabbing and rotating cylinder 722 drives the shell pneumatic clamp 724 to rotate 90° toward the base grabbing mechanism 73. After the base grabbing mechanism 73 drives the motor base with the stator pressed into place, the shell telescopic assembly cylinder 723 drives the shell pneumatic clamp 724 to extend forward to insert the shell into the outside of the motor stator. The above-mentioned base grabbing mechanism 73 also includes a grabbing front and rear shifting driver 731 and a lifting grabbing cylinder 732. The grabbing front and rear shifting driver 731 can adopt a linear drive module, which has the advantages of high position control accuracy. The grabbing front and rear shifting driver 731 is installed on the frame 100 through a bracket, the lifting grabbing cylinder 732 is installed on the driving end of the grabbing front and rear shifting driver 731, and the grabbing pneumatic finger claw 733 is installed on the driving end of the lifting grabbing cylinder 732. The grabbing front and rear shifting driver 731 is used to drive the grabbing pneumatic finger claw 733 to move forward and backward to grab the corresponding products on the flow tooling 27 one by one, and transport them to the direction of the shell grabbing installation mechanism 72 and the unloading position. The lifting grabbing cylinder 732 cooperates with the grabbing pneumatic finger claw 733 to grab products from the grabbing flow tooling 27. The specific grabbing positions are on both sides of the motor base.

[0066] return Figure 3 Combined with Figure 8 and Fig. 9As shown, in the present embodiment, a detection device 600 is further provided between the welding device 500 and the shell assembly device 700. The detection device 600 includes a camera 61 and a detection shifting mechanism 62. The camera 61 is arranged directly above the upper flow conveying mechanism 22, and is used to detect the pin welding quality between the motor stator and the motor base; the detection shifting mechanism 62 includes a shifting cylinder 621, a blocking cylinder 622 and a shifting baffle 623. The shifting baffle 623 is installed on the driving end of the blocking cylinder 622, and is used to drive the shifting baffle 623 to telescopically move toward the upper flow conveying mechanism 22; the blocking cylinder 622 is installed on the driving end of the shifting cylinder 621, and is used to drive the shifting baffle 623 to telescopically move along the length direction of the upper flow conveying mechanism 22; the shifting cylinder 621 and the blocking cylinder 622 drive the shifting baffle 623 to control the intermittent movement of the flow tooling 27 on the upper flow conveying mechanism 22 to switch different detection positions. In this embodiment, according to the number of motor stators and motor bases on the flow tooling 27, multiple cameras 61 with equal spacing can be set. For example, in this embodiment, there are 8 products on the flow tooling 27, and 2 cameras 61 can be set. Each camera 61 is responsible for the detection of four products, which can improve the detection efficiency. The detection shift mechanism 62 can control the shift baffle 623 to be inserted between the adjacent base positioning blocks 274 of the flow tooling 27 and conveyed forward, and move forward one product spacing each time to achieve the switching of each product. The camera 61 can identify the welding quality through the image, which is convenient for timely detection of defective products and ensures the qualified rate of product production. The camera 61 identifies the welding quality of the welding position. The working principle of this is a mature technology and will not be elaborated on. After the detection device 600 identifies the defective product, the base gripping mechanism 73 can be moved to the defective product unloading station in the shell assembly station to automatically remove the defective product. Of course, an independent defective product removal mechanism can also be set at the detection device 600.

[0067] It should be understood that for the above-mentioned small motor, there is also a stator-rotor assembly mechanism 800 before the base discharge device 300, on which the rotor A2 and the bearing A3 are pressed and assembled, and the rotor A2 with the bearing A3 installed and the coil support A1 with the coil wound are assembled. The specific design of the stator-rotor assembly mechanism 800 belongs to another part of the technical solution, so it will not be elaborated here. Of course, the stator-rotor assembly mechanism 800 can also be replaced by other assembly mechanisms, such as the assembly of the stator and rotor can be completed on other equipment. Here, the assembled stator and rotor need to be loaded at the station, that is, the stator-rotor assembly mechanism 800 is replaced by other known stator-rotor loading devices, which are used to arrange the assembled stator and rotor in the positioning groove 272a of the flow tooling 27.

[0068] The automatic assembly and welding production line of a small motor of the present invention utilizes a circulating conveyor line to realize the recycling of the circulating tooling, so that the motor stator and the motor base can realize automatic circulation and assembly at each assembly station, and at the same time, the punching and bending forming of the pins of the motor base is integrated into the base discharge device, which ensures the stability of the subsequent press-fitting and welding of the motor stator and the motor base, greatly improves the production efficiency and product quality stability of the small motor, and reduces the production cost. In addition, the entire automatic assembly and welding production line has a compact and reasonable structural design and stable and reliable operation.

[0069] The present invention and its embodiments are described schematically above, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and creatively designs a structure and an embodiment similar to the technical solution without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A small motor automatic assembly welding production line, comprising a frame (100), characterized in that: It also includes a circulating conveyor line (200), a base discharging device (300), a stator pressing device (400) and a welding device (500) arranged on the frame (100), wherein: The circulating conveyor line (200) comprises a conveyor line support (21), an upper-layer circulation conveying mechanism (22), a lower-layer circulation conveying mechanism (23), a tooling descending conversion mechanism (24), a tooling lifting conversion mechanism (25), and a circulation tooling (27); the upper-layer circulation conveying mechanism (22) and the lower-layer circulation conveying mechanism (23) are mounted on a frame (100) via the conveyor line support (21); the upper-layer circulation conveying mechanism (22) is located directly above the lower-layer circulation conveying mechanism (23); the tooling descending conversion mechanism (24) and the tooling lifting conversion mechanism (25) are mounted on a frame (100) via the conveyor line support (21); The lifting conversion mechanism (25) is respectively arranged at both ends of the upper-layer circulation conveying mechanism (22) and the lower-layer circulation conveying mechanism (23); the tooling lowering conversion mechanism (24) is used to transfer the circulation tooling (27) conveyed by the upper-layer circulation conveying mechanism (22) to the lower-layer circulation conveying mechanism (23); the tooling lifting conversion mechanism (25) is used to transfer the circulation tooling (27) conveyed by the lower-layer circulation conveying mechanism (23) to the upper-layer circulation conveying mechanism (22); the upper-layer circulation conveying mechanism (22) has at least a base discharge station and a Stator press-fit welding stations, and a stop mechanism (26) for blocking a circulation tooling (27) is provided at the front of each station; the circulation tooling (27) is provided with a plurality of positioning grooves (272a) for positioning the motor stator and positioning columns (274a) for positioning the motor base, the positioning grooves (272a) and the positioning columns (274a) being axially arranged opposite to each other; the circulation tooling (27) comprises a positioning seat bottom plate (271), a positioning seat (272), a positioning block (273) and a base positioning block (274), the positioning seat ( 272) is fixedly mounted on the positioning seat bottom plate (271), the positioning grooves (272a) are arranged on the positioning seat (272) at equal intervals, the positioning block (273) is mounted on the positioning seat (272) and is located on one side of the corresponding positioning groove (272a), the positioning block (273) is provided with a positioning protrusion (273a), the base positioning block (274) is mounted on the positioning seat bottom plate (271) and is located on the other side of the corresponding positioning groove (272a), and the positioning column (274a) is arranged on the upper part of the base positioning block (274); The base discharging device (300) is arranged at one side of the base discharging station of the upper flow conveying mechanism (22), and comprises a base vibrating feeding mechanism (31), a base pin punching mechanism (32) and a base grabbing and shifting mechanism (33); the base pin punching mechanism (32) comprises a base arrangement groove (321), an upper punch mounting frame (322), an upper punch (323), a lower punch cylinder (324) and a lower punch (325); the base vibrating feeding mechanism (31) is arranged at one side of the base arrangement groove (321), and is used to feed the motor base in a set position state. The motor base is inserted into the base arrangement groove (321), the upper punch (323) is fixedly mounted above the base arrangement groove (321) through the upper punch mounting frame (322), the lower punch (325) is mounted on the driving end of the lower punching cylinder (324), and the lower punch (325) is located below the upper punch (323) and is used to perform punching and bending on the pins on the motor base; the base grabbing and shifting mechanism (33) is arranged on the other side of the base arrangement groove (321) and is used to grab and move the motor base after punching and bending to the flow tooling (27) on the base discharge station; The stator press-fitting device (400) and the welding device (500) are disposed on both sides of the stator press-fitting welding station of the upper circulation conveying mechanism (22); the stator press-fitting device (400) is used to axially press-fit the motor stator on the circulation tooling (27) moved to the stator press-fitting welding station onto the corresponding motor base; and the welding device (500) is used to solder the pressed motor stator and the pins on the motor base.

2. The small motor automatic assembly welding production line according to claim 1 is characterized by: The tooling descending conversion mechanism (24) comprises a descending cylinder (241), a descending positioning seat (242), a lower tooling pushing bracket (243), a lower tooling pushing cylinder (244) and a lower tooling pushing plate (245); the descending positioning seat (242) is mounted on the driving end of the descending cylinder (241), and one end of the descending positioning seat (242) is open toward the upper flow conveying mechanism (22) or the lower flow conveying mechanism (23); the descending cylinder (241) has a driving mechanism for driving the descending positioning seat (244) to move the lower tooling pushing bracket (243); the lower tooling pushing cylinder (244) is driven by the lower tooling pushing bracket (243); the lower tooling pushing plate (245) is driven by the lower tooling pushing bracket (243); the lower tooling pushing plate (245) is driven by the lower tooling pushing bracket (244) to move ...3); the lower tooling pushing plate (245) is driven by the lower tooling pushing bracket (243); the lower tooling pushing plate (245) is driven by the lower tooling pushing bracket (243); the lower tooling pushing plate (245) is driven by the lower tooling pushing bracket (243); the lower tooling pushing plate (245) is driven by the lower tooling pushing bracket (243); the lower tooling pushing plate (245) is driven by the lower tool The starting point of the lifting stroke of the positioning seat (242) switching between the upper flow conveying mechanism (22) and the lower flow conveying mechanism (23), the lower tooling pushing cylinder (244) is installed on one side of the lower flow conveying mechanism (23) through the lower tooling pushing bracket (243), and the lower tooling pushing plate (245) is installed on the driving end of the lower tooling pushing cylinder (244) and is used to push the flow conveying tool (27) on the descending positioning seat (242) onto the lower flow conveying mechanism (23); The tool lifting conversion mechanism (25) comprises a lifting cylinder (251), a lifting positioning seat (252), an upper tool pushing bracket (253), an upper tool pushing cylinder (254) and an upper tool pushing plate (255); the lifting positioning seat (252) is mounted on the driving end of the lifting cylinder (251), and one end of the lifting positioning seat (252) is open toward the upper flow conveying mechanism (22) or the lower flow conveying mechanism (23); the lifting cylinder (251) has a function of driving the lifting positioning seat (254) to move the upper tool pushing bracket (253) and the upper tool pushing plate (255); The lifting and lowering stroke starting point of the positioning seat (252) switching between the lower-layer circulation conveying mechanism (23) and the upper-layer circulation conveying mechanism (22), the upper-layer tooling pushing cylinder (254) is installed on one side of the upper-layer circulation conveying mechanism (22) through the upper-layer tooling pushing bracket (253), and the upper-layer tooling pushing plate (255) is installed on the driving end of the upper-layer tooling pushing cylinder (254) and is used to push the circulation tooling (27) on the lifting positioning seat (252) onto the upper-layer circulation conveying mechanism (22).

3. The small motor automatic assembly welding production line according to claim 1 is characterized by: The base vibration feeding mechanism (31) comprises a base vibration plate (311), a base conveying slide (312), a base linear vibrator (313), a base feeding cylinder (314), a base feeding push plate (315), a base pushing cylinder (316) and a base pushing block (317); the base conveying slide (312) is mounted on the base linear vibrator (313); the discharge port of the base vibration plate (311) is connected to one end of the base conveying slide (312); the other end of the base conveying slide (312) is staggered with the base arrangement groove (321); the base feeding push plate (315) is located between the base conveying slide (312) and the base arrangement groove (321); The base feeding push plate (315) is provided between the base and the groove (321), and a transition groove capable of accommodating a motor base is provided on the base feeding push plate (315), the base feeding push plate (315) is installed on the driving end of the base feeding cylinder (314), and is driven by the base feeding cylinder (314) to switch between the discharge end of the base conveying slideway (312) and the feed end of the base arrangement groove (321); the base pushing block (317) is installed on the driving end of the base pushing cylinder (316), and the telescopic movement direction of the base pushing block (317) is consistent with the length direction of the base arrangement groove (321), and is used to push the motor base in the transition groove of the base feeding push plate (315) into the base arrangement groove (321).

4. The small motor automatic assembly welding production line according to claim 3 is characterized by: The base grabbing and shifting mechanism (33) comprises a base front-to-back shifting driver (331), a base lateral shifting cylinder (332), a base grabbing and lifting cylinder (333) and a base grabbing and pneumatic finger claw (334); the base front-to-back shifting driver (331) is mounted on the frame (100) front-to-back through a bracket; the base lateral shifting cylinder (332) is horizontally mounted on the driving end of the base front-to-back shifting driver (331); the base grabbing and lifting cylinder (333) is mounted on the driving end of the base lateral shifting cylinder (332) through a connecting plate; and the base grabbing and pneumatic finger claw (334) is mounted on the driving end of the base grabbing and lifting cylinder (333).

5. The small motor automatic assembly welding production line according to claim 1 is characterized by: The stator press-fitting device (400) comprises a press-fitting cylinder support (401), a stator press-fitting cylinder (402) and a base baffle (403); the press-fitting cylinder support (401) is arranged on a side close to a positioning groove (272a) on a circulation tooling (27); the stator press-fitting cylinders (402) are arranged side by side on the press-fitting cylinder support (401); the number of the stator press-fitting cylinders (402) is consistent with the number of the positioning grooves (272a) on the circulation tooling (27); the driving end of each stator press-fitting cylinder (402) has a pressure head for pushing the motor stator; the base baffle (403) is arranged on a side close to a positioning column (274a) on the circulation tooling (27) and is used to limit the rear end of the motor base on the circulation tooling (27).

6. The small motor automatic assembly welding production line according to claim 1 is characterized by: The welding device (500) comprises a welding head shift driver (501), a welding head lifting driver (502), a welding head mounting plate (503) and a soldering welding head (504); the welding head shift driver (501) is mounted on a frame (100) front and back via a bracket; the welding head lifting driver (502) is vertically mounted on a driving end of the welding head shift driver (501); the welding head mounting plate (503) is fixed on the driving end of the welding head lifting driver (502); and two groups of soldering welding heads (504) are arranged in parallel on the welding head mounting plate (503).

7. The small motor automatic assembly welding production line according to any one of claims 1 to 6, characterized in that: It also includes a shell assembly device (700), the shell assembly device (700) including a shell feeding mechanism (71), a shell grabbing and mounting mechanism (72) and a base grabbing mechanism (73), the shell feeding mechanism (71) having a shell limit block (714) at the end thereof, the shell grabbing and mounting mechanism (72) having a shell pneumatic clamping jaw (724) capable of rotating and telescopic movement, the shell pneumatic clamping jaw (724) being located above the shell limit block (714), the base grabbing mechanism (73) having a grabbing pneumatic finger claw (733) capable of forward and backward movement and lifting and lowering movement, the grabbing pneumatic finger claw (733) being located directly above the tooling descending conversion mechanism (24); During operation, the pneumatic gripping claw (733) grabs the motor base with the motor stator pressed on it from the flow fixture (27) on the fixture descending conversion mechanism (24), and moves it to the shell pneumatic clamp (724); the shell pneumatic clamp (724) grabs the motor shell from the shell limit block (714), rotates it 90 degrees, and then puts the motor shell on the motor stator; the assembled motor is moved to the motor unloading station by the pneumatic gripping claw (733).

8. The small motor automatic assembly welding production line according to claim 7 is characterized by: The shell feeding mechanism (71) further comprises a shell feeding vibration plate, a shell conveying slide (711) and a shell linear vibrator (712); the shell conveying slide (711) is mounted on the shell linear vibrator (712); one end of the shell conveying slide (711) is connected to the discharge port of the shell feeding vibration plate, and the other end of the shell conveying slide (711) is connected to the shell limit block (714); the shell grabbing and mounting mechanism (72) further comprises a raised plate (721), a grabbing rotating cylinder (722), a shell telescopic assembly cylinder (723), a rotation limit plate (725) and a positioning baffle (726); the grabbing rotating cylinder (722) is mounted on the raised plate (721); the shell telescopic assembly cylinder (723) is mounted on the driving end of the grabbing rotating cylinder (722); The shell pneumatic clamp (724) is mounted on the driving end of the shell telescopic assembly cylinder (723); the rotation limit plate (725) is fixed on the elevated plate (721) and is used to limit the rotation of the shell telescopic assembly cylinder (723) to a vertical position; the positioning baffle (726) is mounted on the cylinder sleeve of the shell pneumatic clamp (724) and is used to play a positioning role with the stator end when the shell is assembled; the base grasping mechanism (73) also includes a grasping front and rear displacement driver (731) and a lifting grasping cylinder (732); the grasping front and rear displacement driver (731) is mounted on the frame (100) through a bracket, the lifting grasping cylinder (732) is mounted on the driving end of the grasping front and rear displacement driver (731), and the grasping pneumatic finger (733) is mounted on the driving end of the lifting grasping cylinder (732).

9. The small motor automatic assembly welding production line according to claim 7 is characterized by: A detection device (600) is also provided between the welding device (500) and the housing assembly device (700). The detection device (600) comprises a camera (61) and a detection shift mechanism (62). The camera (61) is arranged directly above the upper flow conveying mechanism (22) and is used to detect the welding quality of the pins of the motor stator and the motor base. The detection shift mechanism (62) comprises a shift cylinder (621), a blocking cylinder (622) and a shift baffle (623). The shift baffle (623) is installed on the blocking cylinder (621). The driving end of the cylinder (622) is used to drive the shift baffle (623) to move telescopically in the direction of the upper-layer flow conveying mechanism (22); the blocking cylinder (622) is installed on the driving end of the shift cylinder (621) and is used to drive the shift baffle (623) to move telescopically along the length direction of the upper-layer flow conveying mechanism (22); the shift cylinder (621) and the blocking cylinder (622) drive the shift baffle (623) to control the intermittent movement of the flow tooling (27) on the upper-layer flow conveying mechanism (22) to switch different detection positions.

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