A circuit board cleaning machine

Abstract

This utility model discloses a circuit board cleaning machine, including an ultrasonic cleaning machine body with a cleaning tank inside, and a cleaning basket inside the cleaning tank. A frame is erected around the outside of the ultrasonic cleaning machine body, and a lifting support mechanism is installed on the frame. The lifting support mechanism includes a lifting drive cylinder, the output end of which is connected to a moving plate. Parallel hanging arms are fixed to the front side of the moving plate and located on both sides of the moving plate. The cleaning basket is suspended below the hanging arms by a hanging ring. This invention avoids the cleaning basket and the circuit boards at the bottom from touching the bottom, solving the problem that circuit boards stacked at the bottom of the traditional cleaning basket are easily damaged by the high-intensity ultrasonic vibration mechanical impact generated by the ultrasonic transducer. Furthermore, the lifting support mechanism provides support for the draining operation of the cleaning basket, which can, to a certain extent, free the operator's hands and reduce the labor required for circuit board cleaning.

Description

Technical Field

[0001] This utility model relates to cleaning machines, and more particularly to a circuit board cleaning machine. Background Technology

[0002] During the soldering process of printed circuit boards (PCBs), flux and other auxiliary materials are usually used, leaving grease and solder slag residue on the finished PCBs. Currently, one of the most common methods for cleaning PCBs is ultrasonic cleaning. The cleaning principle is as follows: an ultrasonic transducer at the bottom of the cleaning tank of an ultrasonic cleaner generates high-frequency vibrations, causing the cleaning fluid and the cleaning tank to vibrate together at the ultrasonic frequency. This generates tiny bubbles in the cleaning fluid, and when these bubbles burst, they produce a powerful impact force, thereby removing dirt from the surface and crevices of the PCB.

[0003] When performing ultrasonic cleaning of circuit boards, a cleaning basket is typically used to hold the circuit boards, which are then placed together with the basket into the cleaning tank. However, current practices often involve directly placing the cleaning basket into the tank. Due to the lack of support and suspension, the basket may touch the bottom of the tank. Firstly, since the ultrasonic transducer is usually installed below the bottom wall of the cleaning tank, the circuit boards stacked at the bottom of the basket are easily subjected to mechanical impact from the high-intensity ultrasonic vibrations generated by the transducer, potentially damaging fragile electronic components (such as chips, resistors, and capacitors). Secondly, since the cleaning basket and circuit boards are immersed in liquid, manual removal of the basket is required after cleaning. To drain the cleaning solution, the basket must be manually supported and left to drain, resulting in significant labor intensity. Utility Model Content

[0004] To address the shortcomings of the aforementioned technologies, this utility model provides a circuit board cleaning machine.

[0005] To solve the above technical problems, the technical solution adopted by this utility model is: a circuit board cleaning machine, including an ultrasonic cleaning machine body, a cleaning tank is provided inside the ultrasonic cleaning machine body, and a cleaning basket is provided inside the cleaning tank.

[0006] A frame is installed around the outside of the ultrasonic cleaner body, and a lifting support mechanism is installed on the frame.

[0007] The lifting support mechanism includes a lifting drive cylinder, the output end of which is connected to a movable plate, and parallel suspended arms located on both sides of the movable plate are fixed to the front side of the movable plate.

[0008] The cleaning basket is suspended below the suspension arm by a hanging ring.

[0009] Preferably, two sets of reinforcing crossbeams are fixed at the rear support legs of the frame, with each set of reinforcing crossbeams having an L-shaped mounting plate fixed on it.

[0010] The lifting support mechanism is mounted on the L-shaped mounting plate.

[0011] Preferably, the lifting drive cylinder is fixed to the lower L-shaped mounting plate by a cylinder seat, and the output end of the lifting drive cylinder passes upward through the upper L-shaped mounting plate and is assembled and connected with the moving plate.

[0012] Preferably, a guide sleeve for the output end of the lifting drive cylinder to pass through is fixed on the L-shaped mounting plate located above.

[0013] Preferably, each suspension arm is equipped with a front locking pin and a rear locking pin;

[0014] When the washing basket is suspended on the suspension arm, the lifting ring is limited between the front locking pin and the rear locking pin.

[0015] Preferably, the lifting support mechanism also includes a guide column and a sliding sleeve adapted to be mounted on the guide column;

[0016] The guide post is fixed to the L-shaped mounting plate above by the guide post seat, and there is a guide post on both sides of the movable plate;

[0017] A side sliding plate is fixedly connected to the inner side of the sliding sleeve, and the movable plate is fixedly connected to one side sliding plate.

[0018] Preferably, the top of the washing basket is formed with a basket frame, and the basket frame has a circular mounting plate;

[0019] The lifting ring is integrated with a lower lifting shaft, which fixes the lifting ring to the circular mounting plate.

[0020] Preferably, the bottom of the cleaning tank is provided with a horizontal anti-collision base.

[0021] Preferably, the anti-collision base frame has a square frame structure.

[0022] This utility model discloses a circuit board cleaning machine, which is equipped with a lifting support mechanism for hoisting and supporting the cleaning basket. On the one hand, under the hoisting support of the lifting support mechanism, the cleaning basket containing the circuit boards can be suspended in the cleaning tank, avoiding the cleaning basket and the circuit boards at the bottom from touching the bottom. This solves the problem that the circuit boards stacked at the bottom of the traditional cleaning basket are easily damaged by the high-intensity ultrasonic vibration mechanical impact generated by the ultrasonic transducer. On the other hand, by lifting the cleaning basket and the circuit boards after cleaning through the lifting support mechanism, the lifting support mechanism provides support for the draining operation, which can free the operator's hands to a certain extent and reduce the labor of circuit board cleaning work. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0024] Figure 2 for Figure 1 A schematic diagram of the lifting support mechanism.

[0025] Figure 3 This is a schematic diagram of the structure of the cleaning basket of this utility model.

[0026] Figure 4 This is a schematic diagram of the internal structure of the cleaning tank of this utility model.

[0027] In the diagram: 1. Ultrasonic cleaning machine body; 2. Cleaning tank; 3. Frame; 31. Reinforcing beam; 32. L-shaped mounting plate; 4. Lifting support mechanism; 41. Lifting drive cylinder; 42. Moving plate; 43. Suspension wall; 44. Front locking pin; 45. Rear locking pin; 46. Guide column; 47. Side sliding plate; 48. Sliding sleeve; 49. Top plate; 5. Cleaning basket; 51. Basket frame; 52. Circular mounting plate; 6. Lifting ring; 7. Lower lifting shaft; 8. Anti-collision base. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] Example 1:

[0030] This embodiment discloses a circuit board cleaning machine, including an ultrasonic cleaning machine body 1, a cleaning tank 2 inside the ultrasonic cleaning machine body 1, and a cleaning fluid flowing into the cleaning tank 2, mainly providing a place for ultrasonic cleaning of circuit boards.

[0031] The ultrasonic cleaner body 1 is also equipped with an ultrasonic transducer. The ultrasonic transducer is connected to the ultrasonic generator and is stably fixed on the base inside the body, so that the ultrasonic transducer contacts the bottom wall of the cleaning tank 2. Thus, when the high-frequency electrical signal output by the ultrasonic generator acts on the ultrasonic transducer, the piezoelectric ceramic of the transducer will generate mechanical vibration. This vibration propagates in the cleaning liquid in the cleaning tank in the form of ultrasonic waves, which will generate tiny bubbles in the cleaning liquid. When these bubbles burst, they will generate a strong impact force, thereby removing dirt from the surface and crevices of the circuit board.

[0032] Considering the convenience of cleaning the circuit board in the cleaning tank 2, a cleaning basket 5 is usually provided according to the shape characteristics of the cleaning tank 2. The cleaning basket 5 has a mesh that allows cleaning bubbles generated by the cleaning liquid to pass through. The number and size of the mesh openings can be set according to the specific circuit board cleaning requirements, and are not limited in this embodiment.

[0033] This embodiment addresses the issues of circuit boards touching the bottom of the cleaning basket and the difficulty of draining water after cleaning in traditional ultrasonic cleaning processes. Based on the existing structure of the ultrasonic cleaning machine body 1, a frame 3 is installed around the outside of the ultrasonic cleaning machine body 1, and a lifting support mechanism 4 is set based on the frame 3.

[0034] First, the structural features of rack 3 are set as follows: Figure 1 As shown, the frame 3 is supported by four legs and mounted around the body of the ultrasonic cleaner 1.

[0035] Secondly, two sets of reinforcing crossbeams 31 are fixed at the rear support legs of the frame 3, with the two sets of reinforcing crossbeams 31 distributed vertically and horizontally, and each set of reinforcing crossbeams 31 is fixed with an L-shaped mounting plate 32.

[0036] Based on the L-shaped mounting plate 32, a lifting support mechanism 4 is installed.

[0037] like Figure 2 As shown, the lifting support mechanism 4 mainly includes a lifting drive cylinder 41, a moving plate 42, a suspension arm 43, a guide column 46, and a sliding sleeve 48.

[0038] Among them, the lifting drive cylinder 41 is the driving structure of the lifting support. The lifting drive cylinder 41 is fixed to the lower L-shaped mounting plate through the cylinder seat. The output end of the lifting drive cylinder 41 passes upward through the upper L-shaped mounting plate and is assembled and connected with the moving plate 42, so that the moving plate 42 is driven by the lifting drive cylinder 41 to complete the up and down lifting action.

[0039] Preferably, a guide sleeve is fixed on the upper L-shaped mounting plate for the output end of the lifting drive cylinder 41 to pass through. The guide sleeve provides guiding support for the output end of the lifting drive cylinder 41 (i.e., the reciprocating motion of the cylinder piston).

[0040] The suspension arm 43 is used for the insertion and suspension of the cleaning basket 5. The suspension arm 43 is fixedly connected to the front side of the moving plate 42, so that the suspension arm 43 and the cleaning basket 5 can move up and down synchronously with the moving plate 42.

[0041] To ensure the balance of the suspended hoisting of the cleaning basket 5, two sets of suspension arms 43 are arranged in parallel, with each set located near one end of the movable plate 42; correspondingly, as... Figure 3 As shown, a hanging ring 6 is provided on the top of the washing basket 5. The hanging ring 6 is distributed in a four-corner pattern. Two hanging rings on one side are inserted into a suspension arm, and two hanging rings on the other side are inserted into the suspension arm on the other side.

[0042] Preferably, the specific structure for fixing the lifting ring 6 is as follows: a basket frame 51 is formed on the top of the cleaning basket 5, and the basket frame 51 has a circular mounting plate 52; the lifting ring 6 is integrally provided with a lower lifting shaft 7, and the lifting ring 6 is fixed to the circular mounting plate 52 by the lower lifting shaft 7.

[0043] The lower shaft 7 appropriately extends the distance between the lifting ring 6 and the cleaning basket 5, which facilitates the insertion and hoisting of the cleaning basket 5 onto the suspension arm 43.

[0044] Furthermore, to ensure that the washing basket 5 can be quickly positioned and inserted, and that it will not fall off after being inserted into the suspension arm 43; such as Figure 2 As shown, a front locking pin 44 and a rear locking pin 45 are assembled on each suspension arm 43. The front locking pin 44 and the rear locking pin 45 can be assembled by means of plugging and unplugging or by means of threaded structure. After the locking pin is installed on the suspension arm 43, it stands upright at a certain height and can limit the lifting ring on the cleaning basket 5.

[0045] The rear locking pin 45 usually remains stationary. After the washing basket 5 is inserted into the suspension arm 43 using the lifting ring 6, the front locking pin 44 is locked in, so that the lifting ring 6 is limited between the front locking pin 44 and the rear locking pin 45, thereby completing the insertion and suspension installation of the washing basket 5 on the suspension arm 43. Similarly, the washing basket 5 can be removed after removing the front locking pin 45.

[0046] Furthermore, preferably, to make the up-and-down lifting and lowering movements of the movable plate 42 driving the suspension arm 43 and the washing basket 5 more stable and reliable, such as Figure 1 and Figure 2 As shown, guide posts 46 are provided on both sides of the movable plate 42.

[0047] The guide post 46 is fixed to the L-shaped mounting plate above by the guide post seat, and each guide post 46 is fitted with a sliding sleeve 48.

[0048] A side sliding plate 47 is fixedly assembled on the sliding sleeve 48, and then the moving plate 42 is fixedly connected to the side sliding plate 47. Thus, when the lifting drive cylinder 41 drives the moving plate 42 and the suspension arm 43 and the washing basket 5 to move up and down, the guide columns 46 and the sliding sleeve 48 symmetrically distributed on both sides can provide guidance and support for the up and down movement.

[0049] Therefore, in the circuit board cleaning machine disclosed in this embodiment, the lifting drive cylinder 41 is pre-set to have a fixed vertical lifting stroke. After the circuit board to be cleaned is placed in the cleaning basket 5, it is inserted and suspended on the suspension arm 43, and the front locking pin 44 is locked. The lifting drive cylinder 41 lowers the cleaning basket 5 into the cleaning tank 2 containing the cleaning solution according to the preset stroke, so that the cleaning basket 5 is suspended and immersed in the cleaning solution without touching the bottom. Thus, the high-frequency vibration generated by the ultrasonic transducer causes the cleaning solution to generate tiny bubbles, thereby completing the cleaning process of the circuit board. After the cleaning process is completed, the lifting drive cylinder 41 raises the cleaning basket 5 to the initial position according to the preset stroke for draining. After the draining process is completed manually, the front locking pin 44 is removed, and the cleaning basket 5 and the cleaned circuit board can be removed. Then, the next round of cleaning operation is performed.

[0050] Example 2:

[0051] This embodiment discloses a circuit board cleaning machine, which is based on the structure disclosed in Embodiment 1, such as... Figure 1 As shown, a bottom-blocking frame 8 is horizontally installed at the bottom of the cleaning tank 2. The bottom-blocking frame 8 has a certain gap with the bottom wall of the cleaning tank 2, usually about 3cm, so that it can play a safety protection role in the event of failure of the lifting support mechanism 4, so as to prevent the cleaning basket 4 from falling completely into the cleaning tank and hitting the bottom.

[0052] Preferably, the anti-contact frame 8 has a square frame structure, that is, the anti-contact frame 8 only has a four-sided frame structure, so as to minimize the rise of small air bubbles that may affect the cleaning process.

[0053] In summary, the circuit board cleaning machine disclosed in this utility model can achieve hoisting support of the cleaning basket through the setting of the lifting support mechanism. On the one hand, it avoids the cleaning basket and the circuit boards at the bottom from touching the bottom, thus solving the problem that the circuit boards stacked at the bottom of the traditional cleaning basket are easily damaged by the high-intensity ultrasonic vibration mechanical impact generated by the ultrasonic transducer. On the other hand, the lifting support mechanism provides support for the draining operation of the cleaning basket, which can, to a certain extent, free the operator's hands and reduce the labor of circuit board cleaning work.

[0054] The above embodiments are not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are also within the protection scope of the present utility model.

Claims

1. A circuit board cleaning machine, characterized in that: It includes an ultrasonic cleaner body (1), characterized in that: the ultrasonic cleaner body (1) is provided with a cleaning tank (2), and the cleaning tank (2) is equipped with a cleaning basket (5); A frame (3) is installed around the outside of the ultrasonic cleaning machine body (1), and a lifting support mechanism (4) is installed on the frame (3). The lifting support mechanism (4) includes a lifting drive cylinder (41), the output end of the lifting drive cylinder (41) is connected to a moving plate (42), and the front side of the moving plate (42) is fixed with parallel distributed suspension arms (43) located on both sides of the moving plate (42). The cleaning basket (5) is suspended below the suspension arm (43) by means of a hanging ring (6).

2. The circuit board cleaning machine according to claim 1, characterized in that: The frame (3) has two sets of reinforcing crossbeams (31) fixed at the rear support legs, with each set of reinforcing crossbeams (31) having an L-shaped mounting plate (32) fixed on it. The lifting support mechanism (4) is mounted on the L-shaped mounting plate (32).

3. The circuit board cleaning machine according to claim 2, characterized in that: The lifting drive cylinder (41) is fixed to the lower L-shaped mounting plate by a cylinder seat, and the output end of the lifting drive cylinder (41) passes upward through the upper L-shaped mounting plate and is assembled and connected with the moving plate (42).

4. The circuit board cleaning machine according to claim 3, characterized in that: A guide sleeve for the output end of the lifting drive cylinder (41) is fixed on the L-shaped mounting plate located above.

5. The circuit board cleaning machine according to claim 1 or 4, characterized in that: Each of the aforementioned suspension arms (43) is equipped with a front locking pin (44) and a rear locking pin (45). When the cleaning basket (5) is suspended on the suspension arm (43), the lifting ring (6) is limited between the front locking pin (44) and the rear locking pin (45).

6. The circuit board cleaning machine according to claim 5, characterized in that: The lifting support mechanism (4) also includes a guide column (46) and a sliding sleeve (48) adapted to be mounted on the guide column (46). The guide post (46) is fixed to the L-shaped mounting plate above by the guide post seat, and a guide post (46) is distributed on both sides of the movable plate (42). The inner side of the sliding sleeve (48) is fixedly connected to a side sliding plate (47), and the moving plate (42) is fixedly connected to the sliding plate (47).

7. The circuit board cleaning machine according to claim 5, characterized in that: The top of the cleaning basket (5) is formed with a basket frame (51), and the basket frame (51) has a circular mounting plate (52). The lifting ring (6) is integrally provided with a lower lifting shaft (7), and the lifting ring (6) is fixed to the circular mounting plate (52) by the lower lifting shaft (7).

8. The circuit board cleaning machine according to claim 1, characterized in that: The bottom of the cleaning tank (2) is provided with a horizontal anti-collision frame (8).

9. The circuit board cleaning machine according to claim 8, characterized in that: The anti-collision base frame (8) is a square frame structure.

Images