Automatic solder paste stirring mechanism

Abstract

The utility model relates to the technical field of STM production equipment, in particular to an automatic solder paste stirring mechanism which comprises a driving assembly, the driving assembly comprises a rack, a driven shaft is rotationally installed in the rack, the top end of the driven shaft penetrates through the upper portion of the rack to be connected with a stirring assembly, the tail end of the driven shaft is connected with a power source through a driven wheel, and the power source is used for driving the driven wheel to rotate. And a brake assembly is arranged at the driven wheel. The brake assembly is arranged, the push-pull electromagnet is used for pushing the brake frame to be away from the brake wheel, free rotation of the brake wheel is achieved, the guide frame is matched with the guide rod, the sliding direction of the brake frame is limited, the brake spring is arranged, and the elastic force of the brake spring is used for driving the brake frame to move towards the brake wheel. Therefore, the brake clamping piece is used for clamping the brake wheel, the brake wheel stops rotating through friction force, the driven wheel stops rotating, the device stops rotating quickly, and it is guaranteed that braking can still be achieved under the condition of sudden power failure.

Description

Technical Field

[0001] This utility model relates to the field of STM production equipment technology, specifically to an automatic solder paste mixing mechanism. Background Technology

[0002] In the STM industry, solder paste is commonly used as a soldering flux to improve the efficiency of surface mount component soldering. Solder paste is typically a mixture of solder powder, flux, and other surfactants. To prevent solder paste from deteriorating, it usually needs to be stored and transported at low temperatures. During long-term storage or transportation, the solder paste may separate, which requires stirring and warming.

[0003] Solder paste mixing typically requires a mixer. The solder paste container is fixed to both ends of a clamp, and a motor drives the clamp to rotate, causing the solder paste to revolve. Simultaneously, the solder paste container also rotates on its own axis, achieving mixing in a closed environment. Because the high-speed rotation of the solder paste container is dangerous, the mixer usually has a protective cover that must be closed before mixing. A pressure switch is usually installed between the cover and the container; when the cover is closed, the pressure switch opens, cutting off power to the motor to prevent injury from accidental opening. However, even when the motor is powered off, the rapidly rotating solder paste container will continue to rotate due to inertia. The motor's own braking alone cannot stop it quickly enough. Furthermore, the high-speed rotation of the clamp and the stopped motor output pulley exert significant tension on the timing belt, potentially causing it to break. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides an automatic solder paste mixing mechanism.

[0005] The technical solution of this utility model is:

[0006] The automatic solder paste mixing mechanism includes:

[0007] A drive assembly includes a frame, a driven shaft rotatably mounted inside the frame, a stirring assembly connected to the top of the driven shaft through the upper part of the frame, a power source connected to the tail end of the driven shaft via a driven wheel, the power source being used to drive the driven wheel to rotate, and a braking assembly being provided at the driven wheel;

[0008] The stirring assembly includes a main shaft wheel, which is fixedly installed on the top surface of the frame. A driven shaft passes through the main shaft wheel and is fixedly connected to a rotating arm. Rotating clamps are provided at both ends of the top of the rotating arm. The rotating clamps are connected to the main shaft wheel through a transmission belt. When the rotating arm rotates, the transmission belt can drive the rotating clamps to rotate through friction.

[0009] The braking assembly includes a brake wheel, which is fixedly mounted on the top surface of the driven wheel. Brake clamps are symmetrically slidably mounted on both sides of the brake wheel. Each end of the brake clamp is provided with a push-pull electromagnet on its inner side. The push-pull electromagnet is used to drive the brake clamp away from the brake wheel. Pressure components are provided on the outer sides of both ends of the brake clamp. The pressure components are used to drive the brake clamp closer to the brake wheel.

[0010] Preferably, the power source includes a servo motor, which is vertically mounted inside the frame. The output shaft of the servo motor is fixedly connected to an output wheel, and the output wheel is connected to the driven wheel via a synchronous belt.

[0011] Preferably, the rotating clamp includes a rotating shaft, which is rotatably connected to a rotating arm. A solder paste box clamp is fixedly installed at the top of the rotating arm for holding the solder paste box. A rotating wheel is connected through the tail end of the rotating arm.

[0012] Preferably, a guide wheel is rotatably mounted on the back of the rotating arm, and the transmission belt passes under the guide wheel and is engaged with the side of the rotating wheel and the main shaft wheel.

[0013] Preferably, the brake clamp includes a brake frame, the middle part of which is arc-shaped, and a brake pad is provided on the side of the arc-shaped part of the brake frame facing the brake wheel.

[0014] Preferably, a sliding frame is slidably connected to both ends of the brake frame, and the push-pull electromagnet is fixedly installed in the middle of the top surface of the sliding frame.

[0015] Preferably, the pressure assembly includes a guide rod, which is fixedly installed on the outer sides of both ends of the brake frame. The head of the guide rod is slidably connected to a guide frame, which is fixedly installed on both ends of the top surface of the sliding frame. A brake spring is provided on the guide rod and located between the brake frame and the guide frame.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention, by setting up a braking assembly, uses a push-pull electromagnet to push the brake frame away from the brake wheel, enabling the brake wheel to rotate freely. The guide frame and guide rod work together to limit the sliding direction of the brake frame. By setting up a brake spring, the elastic force of the brake spring drives the brake frame to move towards the brake wheel, thereby using brake pads to clamp the brake wheel and using friction to stop the brake wheel from rotating, thus stopping the driven wheel from rotating. This allows the device to stop quickly and ensures that braking can still be achieved in the event of a sudden power outage. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the drive component structure in this utility model;

[0020] Figure 3 This is a schematic diagram of the stirring assembly structure in this utility model;

[0021] Figure 4 This is a schematic diagram of the braking component structure in this utility model.

[0022] The meanings of the labels in the diagram are as follows:

[0023] 1. Drive assembly; 11. Frame; 12. Servo motor; 13. Output pulley; 14. Synchronous belt; 15. Driven pulley; 16. Driven shaft;

[0024] 2. Stirring assembly; 21. Main shaft wheel; 22. Rotating arm; 23. Guide wheel; 24. Rotating wheel; 25. Rotating shaft; 26. Drive belt; 27. Placement cylinder; 28. Clamping wheel; 29. ​​Elastic ring;

[0025] 3. Braking assembly; 31. Brake wheel; 32. Brake pads; 33. Brake frame; 34. Sliding frame; 35. Push-pull electromagnet; 36. Guide rod; 37. Guide frame; 38. Brake spring;

[0026] 4. Solder paste box. Detailed Implementation

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

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] Example 1:

[0030] Please see Figure 1-4 The present invention will describe the above technical solution in detail through the following embodiments:

[0031] The automatic solder paste mixing mechanism includes:

[0032] Drive assembly 1 includes a frame 11, a driven shaft 16 is rotatably mounted inside the frame 11, the top end of the driven shaft 16 passes through the upper part of the frame 11 and is connected to a stirring assembly 2, the tail end of the driven shaft 16 is connected to a power source through a driven wheel 15, the power source is used to drive the driven wheel 15 to rotate, and a braking assembly 3 is provided at the driven wheel 15.

[0033] It should be noted that this utility model should be placed in a sealed protective box, not shown in the figure. The protective box can be a known metal box, including a box body and a box lid. The box lid and the box body can be connected by a hinge. A pressure switch and a door lock should be provided at the contact point between the box lid and the box body.

[0034] Driven shaft 16 and frame 11 are rotatably connected by a thrust bearing. Driven shaft 16 is in a vertical position.

[0035] Driven pulley 15 is engaged with driven shaft 16. Driven pulley 15 is a known synchronous belt pulley. It can be made of metal.

[0036] The power source includes a servo motor 12, which is vertically mounted in the frame 11 by bolts. The output shaft of the servo motor 12 is connected to an output wheel 13, and the output wheel 13 is connected to the driven wheel 15 by a synchronous belt 14.

[0037] The output pulley 13 is a synchronous belt pulley made of a known metal material, and the diameter of the output pulley 13 is smaller than that of the driven pulley 15. When the servo motor 12 is working, it can drive the synchronous belt 14 to rotate through the output pulley 13, thereby driving the driven pulley 15 to rotate, and in turn driving the driven shaft 16 to rotate.

[0038] The stirring assembly 2 includes a main shaft wheel 21, which is fixedly mounted on the top surface of the frame 11 by screws. A driven shaft 16 passes through the main shaft wheel 21 and is fixedly connected to a rotating arm 22. The top two ends of the rotating arm 22 are provided with self-rotating clamps. The self-rotating clamps are connected to the main shaft wheel 21 through a transmission belt 26. When the rotating arm 22 rotates, the transmission belt 26 can drive the self-rotating clamps to rotate through friction.

[0039] The rotating arm 22 is fixedly mounted on the top of the driven shaft 16 by bolts. The rotating arm 22 is symmetrical from left to right, and the axis of the driven shaft 16 passes through the center of gravity of the rotating arm 22.

[0040] When the driven shaft 16 rotates, it can drive the rotating arm 22 to rotate. At the same time, the main shaft wheel 21 remains stationary.

[0041] The main shaft wheel 21 has two annular grooves on its surface, and the transmission belt 26 is engaged in the grooves on the surface of the main shaft wheel 21.

[0042] The self-rotating fixture includes a self-rotating shaft 25, which is rotatably connected to a rotating arm 22 via a thrust bearing. A solder paste box clamp is fixedly installed at the top of the rotating arm 22, which is used to hold the solder paste box 4. A self-rotating wheel 24 is connected through the rotating arm 22 at the tail end.

[0043] The solder paste box fixture includes a placement cylinder 27. The placement cylinder 27 has four clamping wheels 28 evenly arranged at its opening. The clamping wheels 28 are connected in series by elastic rings 29, which are secured to the outer side of the placement cylinder 27.

[0044] Using the elastic force of the elastic ring 29, a portion of the clamping wheel 28 is inserted into the placement cylinder 27. When the solder paste box 4 is inserted into the placement cylinder 27, it squeezes the clamping wheel 28 outward. Under the action of the elastic force of the elastic ring 29, the clamping wheel 28 squeezes the solder paste box 4 inward, thereby fixing the solder paste box 4.

[0045] When the rotating arm 22 rotates, it can drive the placement cylinder 27 and the rotating wheel 24 to revolve around the driven shaft 16 axis via the rotation shaft 25, thereby driving the solder paste box 4 to revolve around the driven shaft 16 axis.

[0046] The rotation shaft 25 can rotate around its own axis, thereby allowing the placement cylinder 27 to rotate around its own axis, and consequently the solder paste box 4 to rotate.

[0047] A guide wheel 23 is rotatably mounted on the back of the rotating arm 22, and the transmission belt 26 passes under the guide wheel 23 and is locked on the side of the rotating wheel 24 and the main shaft wheel 21.

[0048] The guide wheel 23 is used to change the angle of the drive belt 26.

[0049] When the rotating arm 22 rotates, the rotating wheel 24 revolves around the driven shaft 16, but the main shaft wheel 21 remains stationary. At this time, there is sliding friction between the transmission belt 26 and the main shaft wheel 21, and rolling friction between the transmission belt 26 and the rotating wheel 24 and the guide wheel 23. When the materials are the same, the sliding friction is greater than the rolling friction. As a result, the transmission belt 26 and the main shaft wheel 21 will remain relatively stationary, while the rotating wheel 24 will rotate. This will drive the placement cylinder 27 to rotate through the rotating shaft 25, thereby realizing the rotation of the solder paste box 4.

[0050] The braking assembly 3 includes a brake wheel 31, which is fixedly mounted on the top surface of the driven wheel 15. Brake clamps are symmetrically slidably mounted on both sides of the brake wheel 31. Each end of the brake clamp is provided with a push-pull electromagnet 35, which is used to drive the brake clamp away from the brake wheel 31. Pressure components are provided on the outer sides of both ends of the brake clamp, which are used to drive the brake clamp closer to the brake wheel 31.

[0051] The brake wheel 31 is made of metal and is connected to the driven wheel 15 by bolts. The driven shaft 16 passes through the brake wheel 31 and engages with the driven wheel 15. When the driven wheel 15 rotates, the brake wheel 31 can rotate with the driven wheel 15.

[0052] The brake clamp includes a brake frame 33, the middle of which is arc-shaped, and a brake pad 32 is provided on the side of the arc-shaped part of the brake frame 33 facing the brake wheel 31.

[0053] The brake pads 32 can be made of rubber. When the brake pads 32 abut against the brake wheel 31 from both sides, they can use friction to prevent the brake wheel 31 from rotating.

[0054] The brake bracket 33 is slidably connected to the lower ends of the two sides of the sliding bracket 34, and the push-pull electromagnet 35 is fixedly installed in the middle of the top surface of the sliding bracket 34 by screws.

[0055] The sliding frame 34 is fixedly installed inside the frame 11 by screws. When the push-pull electromagnet 35 is energized, the internal iron core moves towards the brake frame 33, pushing the brake frame 33 away from the brake wheel 31, thereby causing the brake pads 32 to separate from the brake wheel 31.

[0056] When the push-pull electromagnet 35 is de-energized, the internal iron core loses its thrust.

[0057] The pressure assembly includes a guide rod 36, which is welded to the outer sides of both ends of the brake frame 33. The head of the guide rod 36 is slidably connected to a guide frame 37, which is fixedly installed at both ends of the top surface of the sliding frame 34 by screws. A brake spring 38 is provided on the guide rod 36 and located between the brake frame 33 and the guide frame 37.

[0058] The brake spring 38 has two ends that abut against the brake frame 33 and the guide frame 37 respectively. After the push-pull electromagnet 35 is de-energized, the elastic force of the brake spring 38 can drive the brake frame 33 to move towards the brake wheel 31, thereby causing the brake pad 32 to abut against the brake wheel 31 and thus preventing the brake wheel 31 from rotating.

[0059] In this embodiment, when the operator uses this device, the solder paste box 4 is inserted into the placement cylinder 27, and the weight of the solder paste box 4 inserted into the two placement cylinders 27 should be consistent.

[0060] Power is supplied to the push-pull electromagnet 35, which simultaneously controls the servo motor 12 to operate.

[0061] When the push-pull electromagnet 35 is energized, the internal iron core moves toward the brake frame 33, pushing the brake frame 33 away from the brake wheel 31, thereby causing the brake pads 32 to separate from the brake wheel 31.

[0062] When the servo motor 12 is working, it can drive the synchronous belt 14 to rotate through the output wheel 13, thereby driving the driven wheel 15 to rotate, and then driving the driven shaft 16 to rotate.

[0063] When the driven shaft 16 rotates, it can drive the rotating arm 22 to rotate. At the same time, the main shaft wheel 21 remains stationary.

[0064] When the rotating arm 22 rotates, it can drive the placement cylinder 27 and the rotating wheel 24 to revolve around the driven shaft 16 axis via the rotation shaft 25, thereby driving the solder paste box 4 to revolve around the driven shaft 16 axis.

[0065] Meanwhile, since the main shaft wheel 21 remains stationary, there is sliding friction between the transmission belt 26 and the main shaft wheel 21, and rolling friction between the transmission belt 26 and the rotating wheel 24 and the guide wheel 23. When the materials are the same, the sliding friction is greater than the rolling friction. As a result, the transmission belt 26 and the main shaft wheel 21 will remain relatively stationary, while the rotating wheel 24 will rotate. In turn, the rotating shaft 25 drives the placement cylinder 27 to rotate, thereby realizing the rotation of the solder paste box 4.

[0066] The solder paste is stirred by utilizing the rotation and revolution of the solder paste container 4.

[0067] In the event of an accident during the stirring process, such as the lid being opened or a power outage, the servo motor 12 will stop working. At the same time, the push-pull electromagnet 35 will also be de-energized.

[0068] When the push-pull electromagnet 35 is de-energized, the internal iron core loses its thrust. The elastic force of the brake spring 38 can drive the brake bracket 33 to move towards the brake wheel 31, thereby causing the brake pad 32 to abut against the brake wheel 31, thus preventing the brake wheel 31 from rotating.

[0069] When the rotation of the brake wheel 31 is stopped, the rotation of the driven wheel 15 is also stopped, thus achieving rapid braking of the stirring assembly 2.

[0070] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tin paste automatic stirring mechanism characterized by, include: A drive assembly (1) includes a frame (11), a driven shaft (16) is rotatably mounted inside the frame (11), a stirring assembly (2) is connected to the top of the driven shaft (16) through the upper part of the frame (11), and a power source is connected to the tail end of the driven shaft (16) through a driven wheel (15). The power source is used to drive the driven wheel (15) to rotate, and a braking assembly (3) is provided at the driven wheel (15). The stirring assembly (2) includes a main shaft wheel (21), which is fixedly installed on the top surface of the frame (11). The driven shaft (16) passes through the main shaft wheel (21) and is fixedly connected to a rotating arm (22). The rotating arm (22) has self-rotating clamps at both ends of its top. The self-rotating clamps are connected to the main shaft wheel (21) through a transmission belt (26). When the rotating arm (22) rotates, the transmission belt (26) can drive the self-rotating clamps to rotate through friction. The braking assembly (3) includes a brake wheel (31), which is fixedly mounted on the top surface of the driven wheel (15). Brake clamps are symmetrically slidably mounted on both sides of the brake wheel (31). Each end of the brake clamp is provided with a push-pull electromagnet (35) on its inner side. The push-pull electromagnet (35) is used to drive the brake clamp away from the brake wheel (31). Pressure components are provided on the outer sides of both ends of the brake clamp. The pressure components are used to drive the brake clamp closer to the brake wheel (31).

2. The automatic tin paste stirring mechanism according to claim 1, wherein: The power source includes a servo motor (12), which is installed vertically downward inside the frame (11). The output shaft of the servo motor (12) is fixedly connected to an output wheel (13), and the output wheel (13) is connected to the driven wheel (15) via a synchronous belt (14).

3. The automatic tin paste stirring mechanism according to claim 1, wherein: The rotating clamp includes a rotating shaft (25), which is rotatably connected to a rotating arm (22). A solder paste box clamp is fixedly installed at the top of the rotating arm (22) for holding a solder paste box (4). A rotating wheel (24) is connected to the tail end of the rotating arm (22).

4. The automatic tin paste stirring mechanism according to claim 3, wherein: The rotating arm (22) has a guide wheel (23) rotatably mounted on its back. The transmission belt (26) passes under the guide wheel (23) and is secured to the side of the rotating wheel (24) and the main shaft wheel (21).

5. The automatic tin paste stirring mechanism according to claim 1, wherein: The brake clamp includes a brake frame (33), the middle part of which is arc-shaped, and a brake pad (32) is provided on the side of the arc-shaped part of the brake frame (33) facing the brake wheel (31).

6. The automatic tin paste stirring mechanism according to claim 5, wherein: The brake frame (33) is slidably connected to the lower ends of the sliding frame (34), and the push-pull electromagnet (35) is fixedly installed in the middle of the top surface of the sliding frame (34).

7. The automatic tin paste stirring mechanism according to claim 6, wherein: The pressure assembly includes a guide rod (36), which is fixedly installed on the outer sides of both ends of the brake frame (33). The head of the guide rod (36) is slidably connected to a guide frame (37), which is fixedly installed on both ends of the top surface of the sliding frame (34). A brake spring (38) is provided on the guide rod (36) and between the brake frame (33) and the guide frame (37).

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