A direct current motor circuit board mounting production line

Abstract

The application provides a DC motor circuit board mounting production line, and relates to the technical field of DC motor production. The DC motor circuit board mounting production line comprises a conveying device, a riveting assembly and a spot welding assembly. The conveying device is provided with a plurality of material receiving parts and can convey the DC motor along a feeding direction. The top of the shell of the DC motor is provided with a port for loading the circuit board. The port edge is provided with a clamping leg. The interior of the DC motor is provided with a partition support and a terminal. The circuit board is placed on the partition support, and the circuit board is provided with a jack. The top of the terminal can pass through the jack and extend out of the jack. The riveting assembly and the spot welding assembly are sequentially arranged along the feeding direction. The riveting assembly can abut against the terminal and the clamping leg and press and bend the terminal and the clamping leg to form a shape, so as to abut the circuit board between the clamping leg and the partition support. The spot welding assembly can weld the terminal and the circuit board with solder. The application can automatically mount the circuit board of the DC motor, and the mounting efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of direct current motor production, and particularly relates to a direct current motor circuit board installation production line. BACKGROUND

[0002] The existing direct current motor generally comprises a shell, a stator, a rotor, a partition support, a circuit board and an end cover used for closing an installation opening formed on the shell.

[0003] When workers assemble the direct current motor, they need to first process a clamping leg on the opening edge of the installation opening of the shell, then install the stator and the rotor into the shell, then install the partition support and the circuit board into the shell, and make the partition support separate the circuit board from the stator, and make the wire terminal extending from the stator pass through the partition support and the through hole formed on the circuit board, then bend the clamping leg by using a riveting device, and make the clamping leg abut the circuit board on the partition support, then weld the circuit board and the wire terminal by using a soldering gun, so that the stator can be electrically connected with the circuit board, and finally install the end cover on the shell and close the installation opening.

[0004] However, since the riveting by using the riveting device and the welding by using the soldering gun need to be manually operated by workers when the circuit board of the direct current motor is installed, the installation efficiency of the circuit board is low.

[0005] Therefore, it is necessary to provide a direct current motor circuit board installation production line. SUMMARY

[0006] In order to solve the problem that the installation process efficiency of the circuit board of the existing direct current motor is low, the present application provides a direct current motor circuit board installation production line.

[0007] The direct current motor circuit board installation production line provided by the present application adopts the following technical scheme: comprising a conveying device, a riveting assembly and a spot welding assembly, a plurality of material receiving parts for receiving direct current motors are arranged on the conveying device, and the direct current motors can be conveyed along a feeding direction, a port for installing a circuit board is arranged on the top of the shell of the direct current motor, a clamping leg is arranged on the opening edge of the port, a partition support and a wire terminal are arranged in the direct current motor, the circuit board is arranged on the partition support, and a jack is formed on the circuit board, and the top end of the wire terminal can pass through the jack and extend out of the jack.

[0008] The riveting assembly and the spot welding assembly are sequentially arranged along the feeding direction, the riveting assembly can abut the wire terminal and the clamping leg, and the wire terminal and the clamping leg can be pressed and formed, so that the circuit board is abutted between the clamping leg and the partition support.

[0009] The spot welding assembly can weld the terminal and the circuit board with solder.

[0010] By adopting the above technical scheme, the worker only needs to first mount the circuit board on the partition support from the top port of the shell of the DC motor and make the top end of the terminal pass through the jack on the circuit board, then places the DC motor on the material receiving member at the starting end of the conveying device in the feeding direction, so that the DC motor can be conveyed from the starting end to the ending end by the conveying device, and the DC motor can sequentially pass through the riveting assembly and the spot welding assembly; the riveting assembly can abut against the terminal and the clamping leg and press and bend the terminal and the clamping leg to form, so that the circuit board is riveted and fixed on the partition support by the clamping leg, and a gap for filling solder is formed between the terminal and the circuit board, thereby the spot welding assembly can weld the terminal and the circuit board with solder, so that the circuit board can be electrically connected with the stator in the DC motor, and finally the installed DC motor is taken off at the ending end of the conveying device, thereby the automatic installation of the circuit board of the DC motor is completed, and the installation efficiency is high.

[0011] Specifically, the riveting assembly comprises a riveting frame, a pre-riveting unit and a forming unit, the forming unit is located between the pre-riveting unit and the spot welding assembly, the pre-riveting unit comprises a pre-riveting driving cylinder and a pre-riveting die, the cylinder body of the pre-riveting driving cylinder is arranged on the riveting frame, the piston rod of the pre-riveting driving cylinder is connected with the pre-riveting die and can drive the pre-riveting die to approach or move away from the material receiving member located directly below the pre-riveting die, and a pre-riveting die head is arranged on the pre-riveting die, which can abut against and pre-bend the clamping leg.

[0012] The forming unit comprises a forming driving cylinder and a forming die, the cylinder body of the forming driving cylinder is arranged on the riveting frame, the piston rod of the forming driving cylinder is connected with the forming die and can drive the forming die to approach or move away from the material receiving member located directly below the forming die, and the forming die can abut against the terminal and the pre-bent clamping leg and press and bend the terminal and the clamping leg.

[0013] By adopting the above technical scheme, the pre-riveting driving cylinder can drive the pre-riveting die head to abut against and pre-bend the clamping leg, and the forming driving cylinder can drive the forming die to abut against the terminal and the pre-bent clamping leg, so as to press and bend the terminal and the clamping leg, thereby the deformation degree of the clamping leg during each press bending can be reduced, the bending part of the clamping leg is prevented from being broken due to excessive deformation at one time, and the clamping leg can be completely bent and formed by two times of riveting and pressing, so that the clamping leg is not easy to rebound after being bent and pressed.

[0014] Further, the forming die comprises a forming die seat, a fixed die head, a movable die head and a movable die driving cylinder, the top of the forming die seat is connected with the piston rod of the forming driving cylinder, the fixed die head is arranged at the bottom of the forming die seat and can abut against the clamping leg;

[0015] The movable die head is connected with the piston rod of the movable die driving cylinder, the cylinder body of the movable die driving cylinder is connected with the forming die seat, when the clamping leg is abutted between the fixed die head and the circuit board, the movable die head can abut against the part of the terminal extending out of the top of the jack, and the piston rod of the movable die driving cylinder can extend out and drive the movable die head to press and bend the terminal.

[0016] By adopting the above technical scheme, the fixed die head can abut against the clamping leg pre-bent on the DC motor located directly below and abut the clamping leg between the fixed die head and the circuit board, so as to press and bend the clamping leg, and when the clamping leg is pressed and bent, the piston rod of the movable die driving cylinder can extend out and drive the movable die head to abut against the part of the terminal extending out of the top of the circuit board, so as to press and bend the part of the terminal.

[0017] Specifically, the spot welding assembly comprises at least one welding unit, the welding unit comprises a welding device, a welding frame and a welding frame driving device, the welding device is arranged on the welding frame, the welding driving device is in transmission connection with the welding frame and can drive the welding frame to drive the welding device to approach or move away from the terminal located directly below the welding device, so as to weld the terminal and the circuit board through the welding device.

[0018] By adopting the above technical scheme, the welding frame driving device can drive the welding frame to drive the welding device to approach the terminal located directly below the welding device, so that the welding device can drop molten solder on the part of the terminal that is pressed and bent, thereby connecting the terminal and the circuit board through the solder.

[0019] Further, the welding unit further comprises a camera device, the camera device is arranged on the welding frame, and when the welding device moves away from the terminal located directly below the welding device, the camera device can take a picture of the terminal and the circuit board around the terminal.

[0020] By adopting the above technical scheme, the camera device can take a picture of the terminal and the circuit board around the terminal, so that the worker can judge whether the welding point is qualified through the image taken by the camera device.

[0021] Specifically, the feeding device comprises a limiting shell, a plurality of sliding seats, an upper horizontal driving cylinder, a lower horizontal driving cylinder, a pair of lifting platforms and a pair of lifting driving cylinders, a limiting groove is formed in the limiting shell along the feeding direction, a partition plate is arranged in the limiting groove along the horizontal direction and divides the limiting groove into an upper channel and a lower channel, and a communication hole is formed in the partition plate and leads to the lower channel;

[0022] The number of the sliding seats is odd, and each sliding seat is provided with a material receiving member on the top, and a part of the sliding seats are arranged in the upper channel and form an upper sliding group in end-to-end mode, the upper sliding group can slide along the upper channel, and another part of the sliding seats are arranged in the lower channel and form a lower sliding group in end-to-end mode, the lower sliding group can slide along the lower channel;

[0023] The upper horizontal driving cylinder is arranged at the starting end of the upper channel along the feeding direction, the lower horizontal driving cylinder is arranged at the terminal end of the lower channel along the feeding direction, each communication hole is provided with a lifting platform, the lifting platform can carry the sliding seat and pass through the communication hole, and each lifting driving cylinder is in driving connection with the corresponding lifting platform and can drive a pair of lifting platforms to synchronously lift;

[0024] When a pair of lifting platforms are located in the lower channel, the piston rod of the lower horizontal driving cylinder can extend and push the sliding seat on the lifting platform adjacent to the lower horizontal driving cylinder away from the lifting platform, so that the sliding seat at one end of the lower sliding group far away from the lower horizontal driving cylinder is moved to the lifting platform adjacent to the sliding seat;

[0025] When a pair of lifting platforms are located in the upper channel, the piston rod of the upper horizontal driving cylinder can extend and push the sliding seat on the lifting platform adjacent to the upper horizontal driving cylinder away from the lifting platform, so that the sliding seat at one end of the upper sliding group far away from the upper horizontal driving cylinder is moved to the lifting platform adjacent to the sliding seat.

[0026] By adopting the technical scheme, the lifting drive cylinder can drive the lifting platform to lift, so as to drive the sliding seat to pass through the communication hole and interact between the upper passage and the lower passage; the worker can first take out a sliding seat from the plurality of sliding seats, then divide the remaining sliding seats into two groups and fill the two groups of sliding seats into the upper passage and the lower passage in a head-to-tail manner, and finally place the taken-out sliding seat on the lifting platform close to the lower horizontal drive cylinder, and then cyclically start each drive cylinder in the order of one pair of lifting platforms descending at the same time, the piston rod of the lower horizontal drive cylinder extending and retracting once, one pair of lifting platforms ascending at the same time, and the piston rod of the upper horizontal drive cylinder extending and retracting once, so that the sliding seat in the upper passage can first move from the start end to the end of the feeding device along the feeding direction, then pass through the communication hole into the lower passage, and finally move from the end to the start of the feeding device in the lower passage in the direction opposite to the feeding direction and return to the upper passage again, thereby achieving the conveying of the DC motor.

[0027] Specifically, the material receiving member is provided with a magnetic receiving hole, and a magnetic member for adsorbing the shell is arranged in the magnetic receiving hole.

[0028] By adopting the above technical scheme, the magnetic member can adsorb the shell of the DC motor, so that the bottom of the DC motor can be adsorbed and fixed on the material receiving member.

[0029] Further, the bottom of the shell is provided with a positioning hole, and the material receiving member is provided with a positioning needle matched with the positioning hole.

[0030] By adopting the above technical scheme, the positioning needle can cooperate with the positioning hole to quickly position the placement position of the DC motor, so as to facilitate the worker to place the DC motor on the material receiving member.

[0031] Specifically, a plurality of clamping jaw cylinders are arranged on one side of the feeding device along the feeding direction, and each clamping jaw cylinder can clamp the DC motor on the material receiving member opposite to it.

[0032] By adopting the above technical scheme, the clamping jaw cylinder can clamp the DC motor on the material receiving member, so as to limit the position of the DC motor and ensure that the DC motor does not easily shake during riveting or welding.

[0033] Specifically, the top of the material receiving member is provided with a slot, a liquid separation film is arranged in the slot along the horizontal direction, a containing cavity for containing buffer liquid is formed between the liquid separation film and the bottom wall of the slot, and a magnetic adsorption member for adsorbing the shell is arranged on the bottom wall of the containing cavity.

[0034] The material receiving part is provided with a pair of buffer cavities spaced apart along the feeding direction, and the insertion slot is arranged between the pair of buffer cavities; each buffer cavity is provided with a piston, and a liquid chamber is formed between the side of the piston facing away from the insertion slot and the cavity wall of the buffer cavity; a non-liquid chamber is formed between the side of the piston facing the insertion slot and the cavity wall of the buffer cavity; and a communication hole for communicating with the buffer cavity is arranged on the cavity wall of each liquid chamber.

[0035] A sliding hole opening into the insertion slot is arranged on the cavity wall of each non-liquid chamber, and the length direction of each sliding hole is parallel to the feeding direction; the material receiving part further comprises a pair of sliding rods and a pair of abutting members; one end of each sliding rod is connected to the corresponding piston, the other end of each sliding rod extends into the insertion slot through the corresponding sliding hole and is connected to the corresponding abutting member, and each sliding rod can slide in the corresponding sliding hole.

[0036] The machine shell can be inserted into the insertion slot and abutted between the elastic membrane and the magnetic attraction member under the attraction of the magnetic attraction member, so as to drive the pair of pistons to approach the insertion slot through the buffer liquid and abut the machine shell between the pair of abutting members.

[0037] By adopting the above technical scheme, when the machine shell of the direct current motor is inserted into the insertion slot, the magnetic attraction member can exert a downward attractive force on the machine shell, so that the elastic membrane is deformed downward under the pressure of the machine shell and is finally abutted between the machine shell and the magnetic attraction member, and the buffer liquid originally in the containing cavity is squeezed into the liquid chambers in the two buffer cavities, so as to push the two pistons to approach the insertion slot through the buffer liquid and abut the machine shell between the pair of abutting members. When the direct current motor is transported to the lower side of the riveting assembly or the spot welding assembly by the material conveying device, the material conveying device stops first, and then starts again and continues to transport the material conveying device along the feeding direction after the riveting assembly bends the clamping leg and the terminal or the spot welding assembly completes the welding operation. At the moment when the material conveying device stops and starts again, the pair of abutting members abut against the side wall of the machine shell and absorb the inertial force of the direct current motor through the pistons and the buffer liquid, so that the direct current motor on the material receiving part is not easy to shake and deviate along the same or opposite direction of the feeding direction due to its own inertia.

[0038] In summary, the present application has at least one of the following beneficial technical effects:

[0039] 1. A device comprising a feeding device, a riveting assembly and a spot welding assembly, the feeding device is provided with a plurality of material receiving members for receiving DC motors and capable of feeding the DC motors in a feeding direction, the top of the housing of the DC motor is provided with a port for accommodating a circuit board, the port edge is provided with a clamping leg, the inside of the DC motor is provided with a partition support and a terminal, the circuit board is placed on the partition support, and the circuit board is provided with a jack, the top end of the terminal can pass through the jack and extend outside the jack; the riveting assembly and the spot welding assembly are sequentially arranged along the feeding direction, the riveting assembly can abut with the terminal and the clamping leg and press and bend the terminal and the clamping leg to form, so that the circuit board is abutted between the clamping leg and the partition support, thereby the circuit board can be riveted and fixed on the partition support through the clamping leg; the spot welding assembly can weld the terminal and the circuit board with solder, so that the circuit board can be electrically connected with the stator in the DC motor, thereby the automatic installation of the circuit board of the DC motor can be completed, and the installation efficiency is high.

[0040] 2. The top of the material receiving member is provided with a slot, a liquid separation film is arranged in the slot in the horizontal direction, and a containing cavity for containing buffer liquid is formed between the liquid separation film and the bottom wall of the slot, and a magnetic attraction member for attracting the housing is arranged on the bottom wall of the containing cavity; a pair of buffer cavities are arranged in the material receiving member in the feeding direction, and the slot is arranged between the pair of buffer cavities, and a piston is arranged in each buffer cavity, a liquid chamber is formed between the side of the piston away from the slot and the cavity wall of the buffer cavity, and a non-liquid chamber is formed between the side of the piston facing the slot and the cavity wall of the buffer cavity, and a communication hole for communicating with the buffer cavity is arranged on the cavity wall of each liquid chamber; a sliding hole opening into the slot is arranged on the cavity wall of each non-liquid chamber, and the length direction of each sliding hole is parallel to the feeding direction, and the material receiving member further comprises a pair of sliding rods and a pair of abutting members, one end of each sliding rod is connected with the corresponding piston, the other end of each sliding rod extends into the slot through the corresponding sliding hole and is connected with the corresponding abutting member, and each sliding rod can slide in the corresponding sliding hole; the housing can be inserted into the slot and abut the elastic film between the housing and the magnetic attraction member under the attraction of the magnetic attraction member, so as to drive the pair of pistons to approach the slot through the buffer liquid and abut the housing between the pair of abutting members; and at the moment when the feeding device stops and starts again, the pair of abutting members will abut with the side wall of the housing and absorb the inertial force of the DC motor through the pistons and the buffer liquid, so that the DC motor on the material receiving member is not easy to shake and deviate in the same or opposite direction of the feeding direction due to its own inertia. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is a perspective view of the first embodiment of the present application;

[0042] Figure 2 is an exploded view of the sliding seat, material receiving member and DC motor of the present application;

[0043] Figure 3 is a side view of the DC motor along the feeding direction; Figure 1A schematic cross-sectional view taken along the central axis of the conveying device in the length direction;

[0044] Figure 4 It is along Figure 3 A schematic cross-sectional view taken along the AA direction, showing only a portion of the riveting frame;

[0045] Figure 5 This is a perspective view of the second embodiment of this application;

[0046] Figure 6 It is along Figure 5 A schematic cross-sectional view of the middle slide, the material support, and the DC motor taken along the central axis.

[0047] Reference numerals: 1. Conveying device; 11. Material receiving component; 111. Magnetic component; 112. Positioning pin; 113. Liquid diaphragm; 114. Magnetic suction component; 115. Piston; 116. Abutment component; 12. Limiting housing; 121. Divider plate; 1211. Connecting hole; 122. Upper sliding assembly; 123. Lower sliding assembly; 13. Slide seat; 14. Upper horizontal drive cylinder; 15. Lower horizontal drive cylinder; 16. Lifting platform; 17. Lifting drive cylinder; 2. Riveting assembly; 21. Riveting frame; 22. Pre-riveting unit; 221. Pre-riveting drive cylinder; 222. Pre-riveting mold; 23. Forming unit; 231. Forming drive cylinder; 232. Forming mold; 2321. Forming mold base; 2322. Fixed mold head; 2323. Moving mold head; 2324. Moving mold drive cylinder; 3. Spot welding assembly; 31. Welding unit; 311. Welding device; 312. Welding frame; 313. Welding frame drive device; 314. Camera device; 4. DC motor; 41. Clamping foot; 42. Terminal block; 5. Gripper cylinder; 6. Worktable. Detailed Implementation

[0048] Figure 1 This is a perspective view of the first embodiment of this application. Figure 2 This is an exploded view of the slide, support component, and DC motor of this application. See also Figure 1 and Figure 2 In the first embodiment provided in this application, a DC motor circuit board assembly production line includes a workbench 6, a material conveying device 1, a riveting assembly 2 and a spot welding assembly 3. The material conveying device 1 includes a limiting housing 12, multiple slide blocks 13, an upper horizontal drive cylinder 14, a lower horizontal drive cylinder 15, a pair of lifting platforms 16 and a pair of lifting drive cylinders 17. Figure 3 It is along Figure 1 A schematic cross-sectional view taken along the central axis of the conveying device along its length, combined with... Figure 3, the limiting shell 12 is provided on the workbench 6, and a limiting groove is formed on the limiting shell 12 along the feeding direction, a partition plate 121 is arranged in the limiting groove along the horizontal direction, and the limiting groove is divided into an upper channel and a lower channel by the partition plate 121, and a communication hole 1211 is formed in the two ends of the partition plate 121 and communicates with the lower channel; the slide 13 is odd in number, and each slide 13 is provided with a material receiving part 11 on the top, and a part of the slides 13 are arranged in the upper channel in end-to-end mode and form an upper slide group 122, and the upper slide group 122 can slide along the upper channel, and another part of the slides 13 are arranged in the lower channel in end-to-end mode and form a lower slide group 123, and the lower slide group 123 can slide along the lower channel; the upper horizontal drive cylinder 14 is arranged at the starting end of the upper channel along the feeding direction, and the lower horizontal drive cylinder 15 is arranged at the terminal end of the lower channel along the feeding direction, and each communication hole 1211 is provided with a lifting platform 16, and the lifting platform 16 can carry the slide 13 and pass through the communication hole 1211, and each lifting drive cylinder 17 is in transmission connection with the corresponding lifting platform 16 and can drive a pair of lifting platforms 16 to synchronously lift, so that the slide 13 can be driven by the lifting platform 16 to pass through the communication hole 1211 and interact between the upper channel and the lower channel.

[0049] Through the above setting, taking the number of the slide 13 as 15 for example, the worker can first take out a slide 13 from the 15 slides 13, then divide the remaining slides 13 into two groups and fill the two groups of slides 13 into the upper channel and the lower channel in end-to-end mode respectively, and finally place the slide 13 taken out alone on the lifting platform 16 close to the lower horizontal drive cylinder 15, and then start each drive cylinder in the order of one pair of lifting platforms 16 descending at the same time, the piston 115 rod of the lower horizontal drive cylinder 15 extending and retracting once, one pair of lifting platforms 16 ascending at the same time, and the piston 115 rod of the upper horizontal drive cylinder 14 extending and retracting once, so that the slide 13 in the upper channel can first move from the starting end to the terminal end of the feeding device 1 along the feeding direction, then pass through the communication hole 1211 into the lower channel, and finally move from the terminal end to the starting end of the feeding device 1 in the lower channel in the direction opposite to the feeding direction and return to the upper channel again, so that the conveying of the direct current motor 4 can be realized. When the clamping leg 41 is abutted between the fixed mold head 2322 and the circuit board, the movable mold head 2323 can be abutted with the part of the terminal 42 extending out of the top of the jack, and the piston 115 rod of the movable mold drive cylinder 2324 can extend and drive the movable mold head 2323 to bend and form the terminal 42.

[0050] Referring to Figure 1 and Figure 2The magnetic receiving hole is provided with a magnetic member 111 for adsorbing the machine shell, so that the bottom of the DC motor 4 can be adsorbed and fixed on the material receiving part 11. The top of the machine shell of the DC motor 4 is provided with a port for loading a circuit board, and three clamping legs 41 are arranged on the port edge at equal intervals around the center of the port. A partition support and two wiring terminals 42 are arranged inside the DC motor 4. The circuit board is arranged above the partition support and is provided with two insertion holes. The top end of each wiring terminal 42 can pass through a corresponding insertion hole and extend above the circuit board. A positioning hole is arranged at the bottom of the machine shell, and a positioning needle 112 is arranged on the material receiving part 11 and matched with the positioning hole, so that the DC motor 4 can be quickly positioned when placed through the cooperation of the positioning needle 112 and the positioning hole, thereby facilitating workers to place the DC motor 4 on the material receiving part 11.

[0051] Figure 4 is a schematic cross-sectional view taken along the A-A direction in Figure 3 , only part of the riveting frame is shown. Referring to Figure 3 and Figure 4 , the riveting assembly 2 includes a riveting frame 21, a pre-riveting unit 22 and a forming unit 23. The riveting frame 21 and the spot welding assembly 3 are sequentially arranged on the workbench 6 in the feeding direction. The forming unit 23 is located between the pre-riveting unit 22 and the spot welding assembly 3. The pre-riveting unit 22 includes a pre-riveting driving cylinder 221 and a pre-riveting die 222. The cylinder body of the pre-riveting driving cylinder 221 is arranged on the riveting frame 21. The piston rod 115 of the pre-riveting driving cylinder 221 is connected with the pre-riveting die 222 and can drive the pre-riveting die 222 to approach or move away from the material receiving part 11 located directly below the pre-riveting die 222. The pre-riveting die 222 is provided with three pre-riveting die heads. Each pre-riveting die head can abut against a corresponding clamping leg 41 and pre-bend the clamping leg 41.

[0052] Referring to Figure 3 and Figure 4The forming unit 23 comprises a forming driving cylinder 231 and a forming die 232. The cylinder body of the forming driving cylinder 231 is arranged on the riveting frame 21. The piston rod of the forming driving cylinder 231 is connected with the forming die 232 and can drive the forming die 232 to approach or move away from the material receiving member 11 located directly below the forming die 232. The forming die 232 comprises a forming die seat 2321, three fixed die heads 2322, a pair of movable die heads 2323 and a pair of movable die driving cylinders 2324. The top of the forming die seat 2321 is connected with the piston rod of the forming driving cylinder 231. The three fixed die heads 2322 are arranged at the bottom of the forming die seat 2321. Each fixed die head 2322 can abut against a corresponding clamping leg 41. The pair of movable die driving cylinders 2324 are arranged oppositely at the bottom of the forming die seat 2321. Each movable die head 2323 is connected with the piston rod of a movable die driving cylinder 2324. When the three clamping legs 41 are abutted against the circuit board by the corresponding fixed die heads 2322, the piston rods of the two movable die driving cylinders 2324 can simultaneously extend and drive the movable die heads 2323 to abut against the part of the corresponding terminal 42 extending to the top of the circuit board, so as to press and bend the part of the terminal 42 and bend the clamping leg 41 towards the center of the circuit board.

[0053] Through the above arrangement, the pre-riveting driving cylinder 221 can drive the pre-riveting die head to abut against the clamping leg 41 and pre-bend the clamping leg 41. The forming driving cylinder 231 can drive the forming die 232 to abut against the terminal 42 and the pre-bent clamping leg 41, so as to press and bend the terminal 42 and the clamping leg 41 into shape. Thus, the deformation degree of the clamping leg 41 can be reduced when it is bent each time, and the bending part of the clamping leg 41 will not be broken due to excessive deformation. The clamping leg 41 can be completely bent and formed by two times of riveting and pressing, so that the clamping leg 41 will not rebound after being bent and pressed.

[0054] Referring to Figure 1 and Figure 3, the spot welding assembly 3 comprises four groups of welding units 31, the two adjacent groups of welding units 31 are responsible for welding different terminal 42, so that the terminal 42 to be welded can be welded with tin material once and then repaired once; each group of welding units 31 comprises a welding device 311, a welding frame 312 and a welding frame 312 driving device, the welding frame 312 is arranged on the workbench 6, and the welding device 311 is arranged on the welding frame 312. The welding device 311 comprises a storage cylinder for heating and storing molten tin, a discharge needle arranged at the bottom of the storage cylinder and a pressure supply pipe connected with the gas source, the gas outlet end of the pressure supply pipe is connected with the top of the storage cylinder, the welding driving device is in transmission connection with the welding frame 312 and can drive the welding frame 312 to drive the discharge needle to approach or move away from the terminal 42 located directly below the discharge needle, and the gas source can pressurize the storage cylinder through the pressure supply pipe when the discharge needle approaches the terminal 42, so that the molten solder is dropped on the bent part of the terminal 42 from the discharge needle, thereby the terminal 42 and the circuit board can be connected through the solder.

[0055] Referring to Figure 1 and Figure 3 , the welding unit 31 further comprises a camera 314 arranged on the welding frame 312, when the welding device 311 moves away from the terminal 42 located directly below the welding device 311, the camera 314 can shoot the terminal 42 and the circuit board around the terminal 42, so that the worker can judge whether the welding point is qualified through the image shot by the camera 314.

[0056] Referring to Figure 1 and Figure 3 , the DC motor circuit board mounting production line further comprises five clamping cylinder 5, five clamping cylinder 5 is arranged on the limiting shell 12 away from the riveting frame 21 on the side in the feeding direction, each clamping cylinder 5 can clamp the DC motor 4 on the material bearing piece 11 opposite to it, so that the position of the DC motor 4 can be limited by the clamping cylinder 5, and the DC motor 4 is not easy to shake when being riveted or welded.

[0057] The following is a specific use process of a DC motor circuit board mounting production line of the present application:

[0058] The worker needs to first install the circuit board on the partition support from the top port of the shell of the DC motor 4, and make the top end of the terminal 42 pass through the hole on the circuit board, and then place the DC motor 4 on the material receiving part 11 at the starting end of the upper passage of the limiting shell 12 in the feeding direction, so that the DC motor 4 can be transported from the starting end to the ending end by the cooperation of the upper horizontal driving cylinder 14, the lower horizontal driving cylinder 15 and the pair of lifting driving cylinders 17, so that the DC motor 4 can pass through the riveting assembly 2 and the spot welding assembly 3 in turn; the riveting assembly 2 can abut against the terminal 42 and the clamping leg 41 and press and form the terminal 42 and the clamping leg 41, so that the circuit board is riveted and fixed on the partition support by the clamping leg 41, and a gap for facilitating solder filling is formed between the terminal 42 and the circuit board, so that the spot welding assembly 3 can weld the terminal 42 and the circuit board with solder, so that the circuit board can be electrically connected with the stator in the DC motor 4, and finally the installed DC motor 4 is taken off at the ending end of the conveying device 1, and the automatic installation of the circuit board of the DC motor 4 is completed, and the installation efficiency is high.

[0059] Figure 5 is a perspective view of a second embodiment of the present application, Figure 6 is a schematic view of the conveying device along Figure 5 is a schematic view of the conveying device along Figure 5 and Figure 6 In the second embodiment provided by the present application, a slot is formed in the top of the material receiving part 11, and a liquid separation film 113 is arranged in the slot in the horizontal direction, and a containing cavity for containing buffer liquid is formed between the liquid separation film 113 and the bottom wall of the slot, and a magnetic attraction member 114 is arranged on the bottom wall of the containing cavity for attracting the shell; a pair of buffer cavities are arranged in the material receiving part 11 in the feeding direction, and the slot is arranged between the pair of buffer cavities, and a piston 115 is arranged in each buffer cavity, and a liquid chamber is formed between the piston 115 and the cavity wall of the buffer cavity on the side of the piston 115 away from the slot, and a non-liquid chamber is formed between the piston 115 and the cavity wall of the buffer cavity on the side of the piston 115 facing the slot, and a communication hole 1211 is formed in the cavity wall of each liquid chamber for communication with the buffer cavity; a sliding hole is formed in the cavity wall of each non-liquid chamber and opens into the slot, and the length direction of each sliding hole is parallel to the feeding direction, and the material receiving part 11 further comprises a pair of sliding rods and a pair of abutting members 116, one end of each sliding rod is connected with the corresponding piston 115, the other end of each sliding rod extends into the slot through the corresponding sliding hole and is connected with the corresponding abutting member 116, and each sliding rod can slide in the corresponding sliding hole; the shell can be inserted into the slot and abut against the elastic film between the shell and the magnetic attraction member 114 under the attraction of the magnetic attraction member 114, so as to drive the pair of pistons 115 to move close to the slot by the buffer liquid and abut the shell between the pair of abutting members 116.

[0060] Through the above arrangement, when the shell of the DC motor 4 is inserted into the slot, the magnetic attraction piece 114 can exert a downward attractive force on the shell, so that the elastic film is deformed downward under the pressure of the shell and is finally abutted between the shell and the magnetic attraction piece 114, and the buffer liquid originally in the accommodating cavity is squeezed into the liquid chambers in the two buffer cavities, so that the two pistons 115 can be pushed close to the slot by the buffer liquid and the shell is abutted between the pair of abutting pieces 116; since the conveying device 1 is stopped first when the DC motor 4 is transported to below the riveting assembly 2 or the spot welding assembly 3, and then the conveying device 1 is started again and continues to transport in the feeding direction after the riveting assembly 2 bends the clamping leg 41 and the terminal or the spot welding assembly 3 completes the welding operation, at the moment when the conveying device 1 stops and starts again, the pair of abutting pieces 116 abut against the side wall of the shell and absorb the inertial force of the DC motor 4 through the pistons 115 and the buffer liquid, so that the DC motor 4 on the material receiving piece 11 is not easy to shake and deviate in the same or opposite direction of the feeding direction due to its own inertia.

[0061] The implementation principle of the DC motor circuit board mounting production line described in the present application is as follows:

[0062] The conveying device 1, the riveting assembly 2 and the spot welding assembly 3 are provided, the conveying device 1 is provided with a plurality of material receiving pieces 11 for receiving the DC motor 4 and can convey the DC motor 4 in the feeding direction, the top of the shell of the DC motor 4 is provided with a port for accommodating the circuit board, the port edge is provided with a clamping leg 41, the inside of the DC motor 4 is provided with a partition support and a terminal 42, the circuit board is placed on the partition support, and the circuit board is provided with a jack, the top of the terminal 42 can pass through the jack and extend outside the jack; the riveting assembly 2 and the spot welding assembly 3 are sequentially arranged in the feeding direction, the riveting assembly 2 can abut against the terminal 42 and the clamping leg 41 and bend and form the terminal 42 and the clamping leg 41, so that the circuit board is abutted between the clamping leg 41 and the partition support, thereby the circuit board can be riveted and fixed on the partition support through the clamping leg 41; the spot welding assembly 3 can weld the terminal 42 and the circuit board with solder, so that the circuit board can be electrically connected with the stator in the DC motor 4, thereby the automatic installation of the circuit board of the DC motor 4 can be completed, and the installation efficiency is high.

[0063] The embodiments of the specific implementation are the preferred embodiments of the present application, but do not limit the protection scope of the present application, wherein the same parts are indicated by the same reference numerals. Therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A DC motor circuit board mounting production line for mounting a circuit board in a DC motor, characterized by: The device includes a feeding device (1), a riveting assembly (2), and a spot welding assembly (3). The feeding device (1) is provided with multiple material receiving parts (11) for receiving the DC motor (4) and can convey the DC motor (4) along the feeding direction. The top of the housing of the DC motor (4) is provided with a port for inserting a circuit board. The port is provided with a locking foot (41) on the edge of the port. The DC motor (4) is provided with a partition bracket and a terminal block (42) inside. The circuit board is placed on the partition bracket and has a socket on the circuit board. The top of the terminal block (42) can pass through the socket and extend to the outside of the socket. The riveting assembly (2) and the spot welding assembly (3) are arranged sequentially along the feeding direction. The riveting assembly (2) can abut against the terminal block (42) and the locking pin (41) and bend the terminal block (42) and the locking pin (41) to form the circuit board abutting between the locking pin (41) and the partition bracket. The riveting assembly (2) includes a riveting frame (21), a pre-riveting unit (22), and a forming unit (23). The forming unit (23) is located between the pre-riveting unit (22) and the spot welding assembly (3). The pre-riveting unit (22) includes a pre-riveting drive cylinder (221) and a pre-riveting mold (222). The cylinder body of the pre-riveting drive cylinder (221) is mounted on the riveting frame (21). The piston rod of the pre-riveting drive cylinder (221) is connected to the pre-riveting mold (222) and can drive the pre-riveting mold (222) to move closer to or away from the material support (11) located directly below the pre-riveting mold (222). The pre-riveting mold (222) is provided with a pre-riveting die. The pre-riveting die head can abut against and pre-bend the clamping foot (41). The forming unit (23) includes a forming drive cylinder (231) and a forming mold (232). The cylinder body of the forming drive cylinder (231) is provided on the riveting frame (21). The piston rod of the forming drive cylinder (231) is connected to the forming mold (232) and can drive the forming mold (232) to approach or move away from the material support (11) located directly below the forming mold (232). The forming mold (232) can abut against the terminal (42) and the pre-bent clamping foot (41) and press the terminal (42) and the clamping foot (41) into shape. The molding die (232) includes a molding die base (2321), a fixed die head (2322), a movable die head (2323), and a movable die drive cylinder (2324). The top of the molding die base (2321) is connected to the piston rod of the molding drive cylinder (2321). The fixed die head (2322) is located at the bottom of the molding die base (2321) and can abut against the retaining foot (41). The movable die head (2323) and the movable die drive cylinder (2324) are connected to each other. The piston rod is connected to the cylinder body of the moving mold drive cylinder (2324) and the forming mold base (2321). When the clamping foot (41) is abutted between the fixed mold head (2322) and the circuit board, the moving mold head (2323) can abut against the part of the terminal (42) that extends out of the top of the socket, and the piston rod of the moving mold drive cylinder (2324) can extend and drive the moving mold head (2323) to bend the terminal (42) into shape. The spot welding assembly (3) is capable of welding the terminal block (42) to the circuit board with solder.

2. A DC motor circuit board mounting production line according to claim 1, characterized in that: The spot welding assembly (3) includes at least one welding unit (31). The welding unit (31) includes a welding device (311), a welding frame (312), and a welding frame (312) driving device. The welding device (311) is mounted on the welding frame (312). The welding driving device is connected to the welding frame (312) and can drive the welding frame (312) to move the welding device (311) closer to or away from the terminal (42) located directly below the welding device (311) so as to weld the terminal (42) and the circuit board via the welding device (311).

3. A DC motor circuit board mounting production line according to claim 2, characterized in that: The welding unit (31) also includes a camera device (314) mounted on the welding frame (312). When the welding device (311) is away from the terminal (42) located directly below the welding device (311), the camera device (314) can capture images of the terminal (42) and the circuit board around the terminal (42).

4. A DC motor circuit board mounting production line according to claim 1, characterized in that: The feeding device (1) includes a limiting housing (12), multiple sliding blocks (13), an upper horizontal drive cylinder (14), a lower horizontal drive cylinder (15), a pair of lifting platforms (16) and a pair of lifting drive cylinders (17). The limiting housing (12) has a limiting groove along the feeding direction. The limiting groove is provided with a partition plate (121) along the horizontal direction and is divided into an upper channel and a lower channel by the partition plate (121). Both ends of the partition plate (121) are provided with connecting holes (1211) leading to the lower channel. There are an odd number of slides (13), and each slide (13) has a material support (11) on its top. A portion of the slides (13) are arranged end to end in the upper channel and form a row of upper sliding groups (122). The upper sliding groups (122) can slide along the upper channel. Another portion of the slides (13) are arranged end to end in the lower channel and form a row of lower sliding groups (123). The lower sliding groups (123) can slide along the lower channel. The upper horizontal drive cylinder (14) is located at the starting end of the upper channel along the feeding direction, and the lower horizontal drive cylinder (15) is located at the ending end of the lower channel along the feeding direction. Each of the connecting holes (1211) is provided with a lifting platform (16). The lifting platform (16) can carry the slide (13) and pass through the connecting hole (1211). Each lifting drive cylinder (17) is connected to the corresponding lifting platform (16) and can drive a pair of lifting platforms (16) to lift synchronously. When both of the lifting platforms (16) are located in the lower channel, the piston rod of the lower horizontal drive cylinder (15) can extend and push the slide (13) on the adjacent lifting platform (16) away from the lifting platform (16), so that the slide (13) at the end of the lower sliding assembly (123) away from the lower horizontal drive cylinder (15) moves to the lifting platform (16) adjacent to the slide (13); When both of the lifting platforms (16) are located in the upper channel, the piston rod of the upper horizontal drive cylinder (14) can extend and push the slide (13) on the adjacent lifting platform (16) away from the lifting platform (16), so that the slide (13) at the end of the upper sliding assembly (122) away from the upper horizontal drive cylinder (14) moves to the lifting platform (16) adjacent to the slide (13).

5. The DC motor circuit board assembly production line according to claim 1, characterized in that: The material receiving component (11) has a nanomagnetic hole, and a magnetic component (111) for adsorbing the housing is provided in the nanomagnetic hole.

6. The DC motor circuit board assembly production line according to claim 5, characterized in that: The bottom of the housing is provided with a positioning hole, and the material receiving component (11) is provided with a positioning pin (112) that is adapted to the positioning hole.

7. The DC motor circuit board assembly production line according to claim 1, characterized in that: It also includes multiple gripper cylinders (5), which are spaced apart on one side of the feeding device (1) along the feeding direction. Each gripper cylinder (5) can grip the DC motor (4) on the opposite material support (11).

8. The DC motor circuit board assembly production line according to claim 1, characterized in that: The top of the material receiving component (11) is provided with a slot, and a liquid-blocking membrane (113) is provided in the slot along the horizontal direction. A receiving cavity for containing buffer solution is formed between the liquid-blocking membrane (113) and the bottom wall of the slot. A magnetic suction component (114) for adsorbing the housing is provided on the bottom wall of the receiving cavity. The material receiving component (11) is provided with a pair of buffer chambers spaced apart along the feeding direction. The slot is opened between the pair of buffer chambers. Each buffer chamber is provided with a piston (115). A liquid chamber is formed between the side of the piston (115) facing away from the slot and the wall of the buffer chamber. A non-liquid chamber is formed between the side of the piston (115) facing the slot and the wall of the buffer chamber. A communication hole (1211) for communicating with the buffer chamber is opened on the wall of each liquid chamber. Each of the liquid-free chambers has a sliding hole on its cavity wall leading to the slot. The length direction of each sliding hole is parallel to the feeding direction. The material receiving member (11) also includes a pair of sliding rods and a pair of abutting members (116). One end of each sliding rod is connected to the corresponding piston (115), and the other end of each sliding rod passes through the corresponding sliding hole and extends into the slot and is connected to the corresponding abutting member (116). Each sliding rod can slide in the corresponding sliding hole. The housing can be inserted into the slot and, under the attraction of the magnetic chuck (114), the liquid-blocking membrane (113) is abutted between the housing and the magnetic chuck (114) to drive a pair of pistons (115) closer to the slot via the buffer solution and abut the housing between a pair of abutments (116).

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