An inverter circuit board assembly device

Abstract

The present application relates to the technical field of circuit board assembly, and particularly relates to an inverter circuit board assembly device. The device comprises a first conveyor, a second conveyor symmetrically installed on the first conveyor, a bolt feeder symmetrically installed on the side of the first conveyor, a controller installed on the side of the first conveyor away from the bolt feeder, a fixed rod connected on the conveyor belt of the first conveyor at intervals, a mounting frame connected on the top of the second conveyor, a first electric push rod installed on the mounting frame, a mounting plate connected on the telescopic rod of the first electric push rod, and a guide frame symmetrically connected on the bottom of the mounting plate. The bolt feeder is used to orderly deliver the bolts into the guide frame, the rotating stopper temporarily holds the bolts, the bit is synchronously pressed and rotated under the driving of the speed reducer, the installation of multiple bolts is completed at one time, the problem that the mechanical hand needs to take and place the bolts for multiple times in the prior art is avoided, the assembly cycle is greatly shortened, and the assembly efficiency is improved.

Description

Technical Field

[0001] This invention relates to the technical field of circuit board assembly, and more particularly to an inverter circuit board assembly apparatus. Background Technology

[0002] Inverters, as power electronic devices that convert direct current (DC) energy into alternating current (AC) energy, are widely used in new energy power generation, electric vehicles, uninterruptible power supplies (UPS), and home appliances. As inverter products develop towards miniaturization, high integration, and high reliability, the requirements for the assembly precision and efficiency of their internal circuit boards are also increasing. In the inverter manufacturing process, circuit board installation is one of the key steps, and its assembly quality directly affects the electrical performance and long-term operational stability of the entire unit.

[0003] Currently, the assembly of inverter circuit boards mainly relies on manual operation or automated equipment. On most production lines, operators need to manually align the circuit board and place it into the inverter housing. Then, they use electric screwdrivers or pneumatic tools to screw multiple bolts into the mounting holes on the circuit board one by one to fix the circuit board in the housing. This manual assembly method is not only labor-intensive, but also has a long cycle time, making it difficult to meet the needs of large-scale, high-efficiency production.

[0004] Although some advanced manufacturing companies have introduced automated assembly equipment to improve production efficiency, existing automated assembly systems typically use two independent conveyors to transport circuit boards and housings separately. At the workstation, a robotic arm picks up the circuit board and places it into the housing, while another robotic arm picks up bolts one by one from an automatic bolt feeder and inserts them into the mounting holes of the circuit board in sequence. Finally, an automatic tightening device completes the fastening. In this process, the two robotic arms need to frequently perform rotation, movement, and positioning operations, resulting in complex motion paths and long cycle times. Especially when multiple bolts are used, the robotic arms need to travel back and forth between the bolt feeding point and the installation station multiple times, leading to a longer overall assembly cycle and lower assembly efficiency. Summary of the Invention

[0005] In view of this, the present invention provides an inverter circuit board assembly device, which can overcome the disadvantages of high labor intensity in manual assembly of inverter circuit boards, and the existing automated assembly system requires two robotic arms to frequently perform rotation, movement and positioning operations, resulting in a longer overall assembly cycle and lower assembly efficiency.

[0006] The technical solution of the present invention is: an inverter circuit board assembly device, comprising: a first conveyor; a second conveyor symmetrically mounted on the first conveyor; a bolt feeder symmetrically mounted on the side of the first conveyor; a controller mounted on the side of the first conveyor away from the bolt feeder; fixing rods spaced apart and connected to the conveyor belt of the first conveyor; a mounting frame connected to the top of the second conveyor; a first electric push rod mounted on the mounting frame; a mounting plate connected to the telescopic rod of the first electric push rod; a guide frame symmetrically connected to the bottom of the mounting plate, and the bottom of the guide frame having symmetrical notches; a stop assembly disposed on the guide frame for blocking the bolts at the notches; a support assembly disposed on the second conveyor for supporting the circuit board on the second conveyor; a tightening assembly disposed above the mounting plate for tightening the bolts; and a clamping assembly disposed on the mounting plate for clamping the circuit board.

[0007] In one embodiment, the material blocking assembly includes: a rotating block, symmetrically rotatably connected to both sides of the guide frame, and the rotating block blocking the bottom of the notch; and a first torsion spring, with its two ends respectively connected to the rotating block and the guide frame.

[0008] In one embodiment, the support assembly includes: a mounting rod, spaced apart and connected to the conveyor belt of the second conveyor; a support block, rotatably connected to the mounting rod; a second torsion spring, with its two ends respectively connected to the support block and the mounting rod; and a limiting mechanism disposed on the mounting plate for limiting the support block.

[0009] In one embodiment, the limiting mechanism includes: a limiting plate symmetrically connected to the bottom of the mounting plate; a limiting frame symmetrically connected to the top of the mounting plate; and a limiting rod symmetrically connected to the bottom of the mounting plate.

[0010] In one embodiment, a gap is left between two adjacent limiting rods for a bolt to pass through.

[0011] In one embodiment, the tightening assembly includes: a second electric push rod symmetrically mounted on the limit frame; a reduction motor mounted on the telescopic rod of the second electric push rod; and a bit connected to the output shaft of the reduction motor, the bit being located directly above the notch and penetrating the mounting plate.

[0012] In one embodiment, the clamping assembly includes: a third electric push rod symmetrically mounted on the top of the mounting plate; and a clamping plate connected to the telescopic rod of the third electric push rod.

[0013] In one embodiment, it further includes: a sliding stop block, symmetrically slidably connected to the side of the guide frame; and a connecting spring, with its two ends respectively connected to the sliding stop block and the guide frame.

[0014] The beneficial effects are as follows: 1. By setting a guide frame with a notch, a rotating stop block and a first torsion spring to form a material blocking assembly, in conjunction with a bolt feeder and a tightening assembly with a magnetic bit, the present invention can realize the automatic feeding, positioning and synchronous tightening of multiple bolts. Specifically, the bolt feeder transports the bolts into the guide frame in an orderly manner, the rotating stop block temporarily supports the bolts, and the bit is driven by a reduction motor to press down and rotate synchronously, completing the installation of multiple bolts at one time. This avoids the problem of the robot arm having to go back and forth to pick up and put down bolts many times in the prior art, greatly shortening the assembly cycle and improving the assembly efficiency.

[0015] 2. This invention provides stable support during circuit board transportation by setting up a clamping assembly consisting of a clamping plate driven by a third electric push rod, and a support assembly consisting of a mounting rod, a support block, and a second torsion spring. During installation, the clamping plate holds the circuit board and accurately lowers it into the housing. At the same time, the limiting plate and the limiting rod limit the support block during installation to prevent it from rebounding and interfering with the installation, ensuring that the circuit board is aligned with the mounting holes of the housing, thereby improving the accuracy and reliability of the assembly.

[0016] 3. The present invention provides a sliding stop and a connecting spring on the rear side of the guide frame. The rear side of the sliding stop is designed with a slope, which can be squeezed open when the bolt enters and reset by the spring after the bolt passes through. This effectively prevents the bolt from backing up or misaligning during the conveying process, ensuring that the bolt enters the guide frame continuously and stably, reducing equipment downtime caused by material jamming, and improving the continuous operation capability of the production line. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a schematic diagram of the installation of the first electric push rod, mounting plate, and guide frame of the present invention.

[0019] Figure 3 This is a schematic diagram showing the installation of the rotating stop and the first torsion spring of the present invention.

[0020] Figure 4 This is a schematic diagram showing the installation of the mounting rod, support block, and second torsion spring of the present invention.

[0021] Figure 5 This is a schematic diagram of the second conveyor of the present invention conveying the circuit board.

[0022] Figure 6 This is a schematic diagram of the installation of the limiting plate, limiting frame and limiting rod of the present invention.

[0023] Figure 7 This is a schematic diagram of the specific structure of the limiting rod of the present invention.

[0024] Figure 8This is a schematic diagram showing the installation of the second electric push rod, the geared motor, the bit, and the clamping assembly of the present invention.

[0025] Figure 9 This is a schematic diagram of the installation of the sliding stop and connecting spring of the present invention.

[0026] In the attached drawings, the following labels are used: 1-First conveyor, 2-Second conveyor, 3-Bolt feeder, 4-Controller, 5-Fixing rod, 6-Mounting bracket, 7-First electric push rod, 8-Mounting plate, 9-Guide frame, 901-Notch, 10-Rotating stop, 11-First torsion spring, 12-Mounting rod, 13-Support block, 14-Second torsion spring, 15-Limiting plate, 16-Limiting bracket, 17-Limiting rod, 1701-Gap, 18-Second electric push rod, 19-Gear motor, 20-Screwdriver bit, 21-Third electric push rod, 22-Clamping plate, 23-Sliding stop, 24-Connecting spring. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example: An inverter circuit board assembly device, such as Figures 1-8As shown, the system includes a first conveyor 1, a second conveyor 2, a bolt feeder 3, a controller 4, fixing rods 5, a mounting bracket 6, a first electric push rod 7, a mounting plate 8, a guide frame 9, a material blocking assembly, a support assembly, a tightening assembly, and a clamping assembly. The second conveyor 2 is symmetrically mounted on the first conveyor 1 via a bracket, with both second conveyors 2 positioned above the first conveyor 1. Two bolt feeders 3 are symmetrically mounted on the rear center of the first conveyor 1. The controller 4 is mounted on the front right side of the first conveyor 1. Multiple sets of fixing rods 5 are connected at intervals along the conveyor belt of the first conveyor 1, with two fixing rods in each set, used for positioning and clamping the inverter housing. The top right sides of both second conveyors 2 are connected to... Mounting bracket 6, with a first electric push rod 7 installed between the two mounting brackets 6. Mounting plate 8 is connected to the telescopic rod of the first electric push rod 7. Guide frames 9 are connected to the left and right sides of the bottom of the mounting plate 8. The bottom of the guide frame 9 has a strip hole. The front and rear sides of the guide frame 9 are open. The rear side of the guide frame 9 is aligned with and connected to the discharge port of the bolt feeder 3. The bottom of the two guide frames 9 has symmetrical notches 901. The guide frame 9 is equipped with a material blocking component for blocking the bolt at the notch 901. The second conveyor 2 is equipped with a support component for supporting the circuit board. The top of the mounting plate 8 is equipped with a tightening component for tightening the bolts. The mounting plate 8 is equipped with a clamping component for clamping the circuit board.

[0029] like Figure 3 As shown, the material blocking assembly includes a rotating block 10 and a first torsion spring 11. The left and right sides of the two guide frames 9 are symmetrically connected to the rotating blocks 10, and the rotating blocks 10 block the bottom of the notch 901. The rotation axis of each rotating block 10 is connected to the guide frame 9 by a first torsion spring 11.

[0030] like Figures 4-7 As shown, the support assembly includes mounting rods 12, support blocks 13, a second torsion spring 14, and a limiting mechanism. Multiple mounting rods 12 are spaced apart on the conveyor belts of the two second conveyors 2, and the mounting rods 12 are grouped in pairs. Support blocks 13 are rotatably connected between the lower parts of two mounting rods 12 in the same group. The support blocks 13 are L-shaped, and four support blocks 13 arranged in a rectangular pattern form a group (e.g., ...). Figure 5As shown), four support blocks 13 cooperate to support the same circuit board. A second torsion spring 14 is connected between the rotation axis of each support block 13 and the mounting rod 12. The mounting plate 8 is provided with a limiting mechanism for limiting the support blocks 13. The limiting mechanism includes a limiting plate 15, a limiting frame 16 and a limiting rod 17. The bottom front side of the mounting plate 8 is symmetrically connected to the limiting plate 15. The rear side of the limiting plate 15 contacts the front side of the guide frame 9. The top of the mounting plate 8 is symmetrically connected to the limiting frame 16. The bottom rear side of the mounting plate 8 is symmetrically connected to the limiting rod 17. There are four limiting rods 17, and a gap 1701 is left between two adjacent limiting rods 17. When the bolt feeder 3 conveys the bolt forward, the bolt can pass through the gap 1701 and enter the guide frame 9.

[0031] like Figure 8 As shown, the tightening assembly includes a second electric push rod 18, a reduction motor 19, and a bit 20. The two limit frames 16 are symmetrically mounted with the second electric push rod 18. The telescopic rods of the four second electric push rods 18 are all mounted with reduction motors 19. The output shafts of the four reduction motors 19 are all connected with bit 20. The bit 20 is located directly above the notch 901. The bit 20 penetrates the mounting plate 8, and the lower end of the bit 20 is magnetic.

[0032] like Figure 8 As shown, the clamping assembly includes a third electric push rod 21 and a clamping plate 22. The third electric push rod 21 is installed on both the left and right sides of the top of the mounting plate 8, and the clamping plate 22 is connected to the telescopic rod of the two third electric push rods 21.

[0033] like Figure 9 As shown, it also includes a sliding block 23 and a connecting spring 24. The lower rear sides of the two guide frames 9 are symmetrically connected to the sliding blocks 23. The rear side of the sliding block 23 is an inclined surface. Each sliding block 23 is connected to the guide frame 9 by a connecting spring 24.

[0034] When the device is needed, the circuit board can be placed between the four support blocks 13 in the same group, and the outer casing can be placed between the two fixing rods 5 in the same group. Under the limiting action of the support blocks 13 and the fixing rods 5, the circuit board will be precisely positioned directly above the installation position of the outer casing. Then, the controller 4 controls the first conveyor 1 and the second conveyor 2 to start working. The first conveyor 1 and the second conveyor 2 can synchronously transport the outer casing and the circuit board to the right. At the same time, the controller 4 can control the bolt feeder 3 to automatically arrange an appropriate amount of bolts and transport them forward. The bolts will first pass through the gap 1701, and then the bolts will contact the inclined surface on the rear side of the sliding stop 23. The bolts will then squeeze the sliding stops 23 on the left and right sides to move to opposite sides, and the connecting spring 24 will be compressed. The bolt will enter the guide frame 9, at which point the bolt nut will rest on the inner bottom of the guide frame 9, while the bolt shank will be located in the slotted hole at the bottom of the guide frame 9. Simultaneously, the bolt will disengage from the inclined surface behind the sliding stop 23, and the connecting spring 24 will return to its original position, causing the sliding stops 23 on both sides to move to opposite sides and reset. When the guide frame 9 is full of bolts, the controller 4 will control the bolt feeder 3 to stop working. At this time, the rotating stop 10 can support the bolt nut located at the notch 901. When the outer casing and circuit board move directly below the mounting plate 8, the controller 4 will control the first conveyor 1 and the second conveyor 2 to stop working. Then, the controller 4 will control the first electric push rod 7 to drive the mounting plate 8 downwards. The mounting plate 8 drives the guide frame 9 and... As clamping plate 22 moves downward, guide frame 9 drives the bolts inside it to move downward. At this time, limiting plate 15 and sliding stop 23 respectively block the front and rear sides of guide frame 9, thereby limiting the bolts inside guide frame 9 and preventing them from falling off. When the two clamping plates 22 move to the left and right sides of the circuit board respectively, controller 4 will control the third electric push rod 21 to drive the two clamping plates 22 to move to the opposite side, so that the clamping plates 22 clamp the circuit board. At this time, mounting plate 8 can drive the circuit board to move downward through clamping plate 22. The circuit board will squeeze support block 13 and rotate downward to open. The second torsion spring 14 deforms. When the circuit board separates from support block 13, as mounting plate 8 continues to move downward, limiting plate 15, limiting rod 17 and limiting frame 1 on mounting plate 8 will... The sixth component will sequentially contact the support block 13 to limit its movement and prevent it from rotating upwards to close. Simultaneously, the clamping plate 22 places the circuit board inside the housing. Then, the controller 4 controls the second electric push rod 18 to drive the reduction motor 19 and the bit 20 downwards, and controls the reduction motor 19 to drive the bit 20 to rotate. When the lower end of the bit 20 contacts the top of the bolt at the notch 901, the lower end of the bit 20, being magnetic, can attract the bolt. At this time, the bit 20 can drive the bolt to rotate and push it downwards. The bolt will press the rotating stop 10 downwards to open, causing the first torsion spring 11 to deform. When the bolt disengages from the rotating stop 10, the bit 20 will contact the rotating stop 10.This limits the rotation stop 10, preventing it from rotating upwards to close. Then, the bolt can be inserted into the mounting holes on the circuit board and housing and tightened, thus fixing the circuit board inside the housing. Next, the controller 4 controls the third electric push rod 21 to drive the two clamping plates 22 to move and reset to opposite sides, causing the clamping plates 22 to release the circuit board. Then, the controller 4 controls the reduction motor 19 to stop working and controls the second electric push rod 18 to drive the reduction motor 19 and the bit 20 upwards to reset, causing the bit 20 to first separate from the bolt, and then from the rotation stop 10. The first torsion spring 11 returns to its original state, causing the rotation stop 10 to rotate upwards to close. Controller 4 controls the first electric push rod 7 to drive the mounting plate 8 to move upwards and reset. The mounting plate 8 then moves the guide frame 9 and clamping plate 22 upwards and resets, thereby releasing the limit on the support block 13. This allows the second torsion spring 14 to return to its original position, causing the support block 13 to rotate upwards and close. Then, controller 4 controls the first conveyor 1 and the second conveyor 2 to transport the next circuit board and housing to the right, directly below the mounting plate 8. Controller 4 also controls the bolt feeder 3 to add two bolts to the guide frame 9. At this time, the bolts in the guide frame 9 will press and push against each other, automatically filling the gap 901. Repeating this operation automatically completes the assembly of the inverter circuit board.

[0035] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An inverter circuit board assembly device, comprising: a first conveyor (1); a second conveyor (2) symmetrically installed on the first conveyor (1); and a bolt feeder (3) symmetrically installed on the side of the first conveyor (1); characterized in that, The controller (4) is installed on the side of the first conveyor (1) away from the bolt feeder (3); the fixed rods (5) are connected to the conveying belts of the first conveyor (1) at intervals; the mounting racks (6) are connected to the top of the second conveyor (2); the first electric push rods (7) are installed on the mounting racks (6); the mounting plates (8) are connected to the telescopic rods of the first electric push rods (7); the guide frames (9) are symmetrically connected to the bottoms of the mounting plates (8), and the bottoms of the guide frames (9) are symmetrically provided with notches (901); the material blocking assemblies are arranged on the guide frames (9) and used for blocking the bolts at the notches (901); the supporting assemblies are arranged on the second conveyor (2) and used for supporting the circuit boards on the second conveyor (2); the tightening assemblies are arranged above the mounting plates (8) and used for tightening the bolts; the clamping assemblies are arranged on the mounting plates (8) and used for clamping the circuit boards; the material blocking assemblies comprise rotating blocking blocks (10) which are symmetrically and rotatably connected to the two sides of the guide frames (9) and block the bottoms of the notches (901); the first torsional springs (11) are connected to the rotating blocking blocks (10) and the guide frames (9) at two ends; the supporting assemblies comprise mounting rods (12) which are connected to the conveying belts of the second conveyor (2) at intervals; the supporting blocks (13) are rotatably connected to the mounting rods (12); the second torsional springs (14) are connected to the supporting blocks (13) and the mounting rods (12) at two ends; the limiting mechanisms are arranged on the mounting plates (8) and used for limiting the supporting blocks (13); the clamping assemblies comprise third electric push rods (21) which are symmetrically installed on the top of the mounting plates (8); clamping plates (22) which are connected to the telescopic rods of the third electric push rods (21).

2. An inverter circuit board assembly apparatus according to claim 1, wherein, The limiting mechanisms comprise limiting plates (15) which are symmetrically connected to the bottoms of the mounting plates (8); limiting racks (16) which are symmetrically connected to the tops of the mounting plates (8); and limiting rods (17) which are symmetrically connected to the bottoms of the mounting plates (8).

3. An inverter circuit board assembly apparatus according to claim 2, wherein, Gaps (1701) through which the bolts pass are left between adjacent two limiting rods (17).

4. The inverter circuit board assembly apparatus of claim 2, wherein, The tightening assemblies comprise second electric push rods (18) which are symmetrically installed on the limiting racks (16); reduction motors (19) which are installed on the telescopic rods of the second electric push rods (18); and bits (20) which are connected to the output shafts of the reduction motors (19), the bits (20) are located directly above the notches (901), and the bits (20) penetrate through the mounting plates (8).

5. The inverter circuit board assembly apparatus of claim 1, wherein, The sliding blocking blocks (23) are symmetrically and slidingly connected to the sides of the guide frames (9); and the connecting springs (24) are connected to the sliding blocking blocks (23) and the guide frames (9) at two ends.

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