Polarity rotating mechanism and chip mounter

Abstract

This utility model relates to the field of chip mounter technology, and more particularly to a polarity rotation mechanism and a chip mounter. The polarity rotation mechanism includes a rotation component, a detection component, and a lifting component. The rotation component includes a first drive member and a rotating member connected to the output end of the first drive member; the rotating member has a receiving groove for accommodating workpieces. The detection component includes through-beam sensors disposed on both sides of the receiving groove, which are used to detect workpieces located in the receiving groove. The lifting component includes a second drive member and a lifting member connected to the output end of the second drive member; the through-beam sensors are communicatively connected to the second drive member; the lifting member is disposed below the receiving groove and is used to lift the workpiece in the receiving groove. The lifting component can eject the workpiece in a timely manner, conveniently and quickly without manual intervention, improving the efficiency of the polarity rotation mechanism; furthermore, this polarity rotation mechanism has at least two stations for rotating workpieces and can be applied to chip mounters with at least two nozzles to improve mounting efficiency.

Description

Technical Field

[0001] This utility model relates to the field of chip mounting equipment technology, and more specifically, to a polarity rotation mechanism and a chip mounting machine. Background Technology

[0002] Pick and place machines are one of the core pieces of equipment used in SMT production. The placement head of the pick and place machine reciprocates between the pick and place machine's loading device and the circuit board to be placed, continuously picking up the workpieces to be placed from the carrier of the loading device and placing them onto the circuit board, completing the continuous placement process. During the placement process, a polarity rotation mechanism is usually required to rotate the workpiece to a preset angle before placing the rotated workpiece onto the circuit board to achieve its circuit function.

[0003] In existing technologies, polarity rotation mechanisms typically include a rotating component with a groove. During polarity rotation, the workpiece needs to be placed into the groove by pressing down on the nozzle. The rotating component then rotates, and the nozzle picks up the rotated workpiece. However, pressing down on the nozzle can cause the workpiece to become stuck in the groove, making it difficult to remove normally. In this case, the pick-and-place machine usually needs to be stopped manually, and the workpiece needs to be removed using tweezers or other tools, which is time-consuming and labor-intensive, reducing the efficiency of the pick-and-place machine. Utility Model Content

[0004] To overcome the technical problem in the prior art that the workpiece is easily stuck in the groove of the rotating component and difficult to remove, this utility model provides a polar rotation mechanism, which includes:

[0005] A rotating assembly, comprising a first driving member and a rotating member connected to the output end of the first driving member, wherein the rotating member has a receiving groove for accommodating a workpiece;

[0006] The detection assembly includes through-beam sensors disposed on both sides of the receiving groove, the through-beam sensors being used to detect the workpiece located in the receiving groove;

[0007] A lifting assembly includes a second driving component and a lifting member connected to the output end of the second driving component. The through-beam sensor is communicatively connected to the second driving component. The lifting member is disposed below the receiving groove and is used to lift the workpiece in the receiving groove.

[0008] Furthermore, the rotating assembly includes a driving wheel and a driven wheel, the driving wheel is disposed at the output end of the first driving member, the driven wheel is connected to the driving wheel in a transmission manner, and the rotating member is disposed on the upper surface of the driven wheel.

[0009] Furthermore, the driven wheel has a clearance groove extending in the vertical direction, the clearance groove is connected to the receiving groove, and the lifting member is slidably connected in the clearance groove.

[0010] Furthermore, a sensor is provided at the drive wheel, and the sensing component is used to detect the rotation angle of the drive wheel.

[0011] Furthermore, the polarity rotation mechanism also includes a frame for movably connecting to the pick and place machine, and the rotation component, the detection component, and the lifting component are all disposed on the frame.

[0012] Furthermore, the frame includes a fixed block and a movable frame, the fixed block being fixed to the pick and place machine and the fixed block being slidably connected to the movable frame.

[0013] Furthermore, one end of the fixed block is rotatably connected to a threaded connector, and the end of the threaded connector is threadedly connected to the movable frame.

[0014] Furthermore, the frame also includes a fixing member, and the frame has an adjustment hole extending along the length direction of the threaded connector. The first fixing member can be fixed to the pick and place machine and connected to different positions of the adjustment hole.

[0015] Furthermore, each of the rotating component, the detection component, and the lifting component is provided with at least two sets.

[0016] Another aspect of this invention provides a chip mounter that uses the aforementioned polarity rotation mechanism.

[0017] Beneficial effects:

[0018] This application provides a polar rotation mechanism, comprising a rotation component, a detection component, and a lifting component. The rotation component includes a first driving member and a rotating element connected to the output end of the first driving member, the rotating element having a receiving groove for accommodating a workpiece. The detection component includes through-beam sensors disposed on both sides of the receiving groove, the through-beam sensors being used to detect the workpiece located in the receiving groove. The lifting component includes a second driving member and a lifting element connected to the output end of the second driving member, the through-beam sensors being communicatively connected to the second driving member, and the lifting element being disposed below the receiving groove for lifting the workpiece in the receiving groove. When the workpiece normally enters the receiving groove and is placed flat, the light emitted by the through-beam sensors can pass through the workpiece, and the polar rotation mechanism operates normally. When the workpiece enters the receiving groove but becomes skewed and jammed, the suction nozzle also has difficulty achieving a large contact area with the upper surface of the workpiece to pick it up. In this case, the light emitted by the through-beam sensors cannot smoothly pass through the skewed workpiece to generate a corresponding signal. The lifting component receives this signal and physically ejects the workpiece. This polar rotation mechanism can conveniently and quickly solve the technical problem of workpiece jamming, improving the overall efficiency of the polar rotation mechanism without manual intervention. Furthermore, this polar rotation mechanism is equipped with at least two stations for rotating workpieces. Each station can operate independently, allowing for simultaneous rotation of each workpiece or rotation of a workpiece using a single-sided station. This polar drive mechanism can be applied to pick-and-place machines with at least two nozzles to double the efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the polarity rotation mechanism provided in this embodiment;

[0021] Figure 2 This is a side cross-sectional schematic diagram of the polarity rotation mechanism provided in this embodiment;

[0022] Figure 3 This is a top cross-sectional view of the polarity rotation mechanism provided in this embodiment.

[0023] In the figure: 1. First driving component; 2. Rotating component; 21. Receiving groove; 3. Detection component; 4. Second driving component; 5. Lifting component; 61. Driving wheel; 62. Driven wheel; 63. Transmission belt; 71. Sensing plate; 72. Detection component; 81. Fixed block; 82. Movable frame; 821. Adjustment hole; 83. Threaded connection component. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0025] like Figures 1-3 As shown, this embodiment provides a polar rotation mechanism, which includes a rotation assembly, a detection assembly 3, and a lifting assembly. The rotation assembly includes a first driving member 1 and a rotating member 2 connected to the output end of the first driving member 1. The rotating member 2 has a receiving groove 21 for accommodating a workpiece. The detection assembly 3 includes through-beam sensors disposed on both sides of the receiving groove 21, which are used to detect the workpiece located in the receiving groove 21. The lifting assembly includes a second driving member 4 and a lifting member 5 connected to the output end of the second driving member 4. The through-beam sensors are communicatively connected to the second driving member 4. The lifting member 5 is disposed below the receiving groove 21 and is used to lift the workpiece in the receiving groove 21.

[0026] Understandably, when the workpiece is placed horizontally after entering the receiving groove 21, the light emitted by the through-beam sensor can pass through the workpiece, and the polarity rotation mechanism operates normally. However, if the workpiece becomes skewed and jammed after entering the receiving groove 21, the suction nozzle will have difficulty establishing a large contact area with the workpiece's upper surface to pick it up. The light emitted by the through-beam sensor will then be unable to pass smoothly through the skewed workpiece to generate a corresponding signal. Upon receiving this signal, the lifting assembly physically ejects the workpiece, which is convenient, quick, and requires no manual intervention, thus improving the overall efficiency of the polarity rotation mechanism. Figure 1 The horizontal structure between the two detection components 3 is a beam of light rather than a solid structure.

[0027] Furthermore, the rotating assembly includes a driving wheel 61 and a driven wheel 62. The driving wheel 61 is located at the output end of the first driving member 1, and the driven wheel 62 is connected to the driving wheel 61 in a transmission manner. The rotating member 2 is located on the upper surface of the driven wheel 62. The first driving mechanism is a rotary motor. The lifting mechanism needs to be located below the rotating member 2 to control the workpiece in the receiving groove 21. Therefore, the rotating member 2 cannot be directly connected to the end of the rotary motor, otherwise there will not be enough space below it. The driving wheel 61 is directly located at the end of the rotary motor, and the driven wheels 62 are arranged at horizontal intervals. At this time, there is enough installation space below the driven wheels 62 to prevent the lifting assembly from being lifted. Preferably, the driving wheel 61 and the driven wheel 62 are connected by a transmission belt 63. At this time, the transmission ratio between the driving wheel 61 and the driven wheel 62 is determined by the ratio of their outer diameters. Even if multiple workstations are set up and the driven wheel 62 and the driving wheel 61 have different distances, the transmission ratio between the driving wheel 61 and the driven wheel 62 can be kept constant, and the control system can use the same control method to control the rotary motor.

[0028] Furthermore, the driven wheel 62 has a clearance groove extending vertically, which communicates with the receiving groove 21, and the lifting member 5 is slidably connected in the clearance groove. The lifting member 5 is configured as a lifting rod, and the second driving member 4 is a driving cylinder, with the lifting rod connected to the output end of the driving cylinder. The driving cylinder can drive the lifting rod to rise or fall in the clearance groove, thereby causing the lifting rod to lift the workpiece in the receiving groove 21 or return it to its original position. In some other embodiments, the lifting member 5 can also have other structures and use other movement methods, such as a horizontally moving crossbar with an inclined upper surface, which gradually abuts against the workpiece and pushes it out of the receiving groove 21 during horizontal movement; this is not limited here.

[0029] Furthermore, a sensor is installed at the drive wheel 61 to detect the rotation angle of the drive wheel 61. The polar rotation mechanism requires the workpiece to be rotated at a fixed angle so that the rotated workpiece can be correctly attached to the circuit board. Therefore, installing a sensor at the drive wheel 61 can improve the accuracy of the rotation of the drive wheel 61, thereby ensuring the accuracy of the rotation of the rotating part 2 at the driven wheel 62. Specifically, the sensor includes a sensing plate 71 covering the drive wheel 61 and a detection element 72 for detecting the sensing plate 71. The sensing plate 71 has a positioning port, and the detection element 72 has a light-generating part. The light-generating part is provided with upper and lower parts and can generate vertical light. When the positioning port rotates to the light-generating part, the light path between the upper and lower parts is unobstructed, and the light can connect the upper and lower parts to generate a connection signal; when the positioning port rotates to other positions, the light path between the upper and lower parts is obstructed, and the light cannot connect the upper and lower parts to generate an obstruction signal. Therefore, the initial rotation position of the drive wheel 61 can be taken when the positioning port is located at the light generating part. After each workpiece rotation, the drive motor rotates again until the sensor generates a connection signal. After receiving this signal, the drive motor stops rotating. At this time, it can be ensured that the drive wheel returns to the initial rotation position, so that other workpieces can be rotated in polarity.

[0030] In one embodiment of the aforementioned polar rotation mechanism, the workpiece located in the receiving groove 21 is at a preset rotation angle when in the initial rotation position. In the initial rotation position, the suction nozzle pushes the workpiece downwards, temporarily preventing it from entering the receiving groove 21. The workpiece can only enter the receiving groove 21 after the rotating component 2 rotates a certain angle. The rotating component 2 then rotates again until it returns to the initial rotation position, at which point the workpiece is at the preset rotation angle, and the suction nozzle can then remove the workpiece for use. In some other embodiments, other methods for determining the rotation angle can be used, which are not limited here.

[0031] Specifically, the polarity rotation mechanism also includes a frame, which is movably connected to the pick-and-place machine. The rotation component, detection component 3, and lifting component are all mounted on the frame. The workpiece needs to be picked up by a nozzle mounted on a cam for transfer between the various mechanisms. Therefore, the workpiece's movement trajectory is circular. The frame's movability to the pick-and-place machine ensures that the rotating component 2 is positioned directly below the workpiece's movement trajectory, thereby guaranteeing that the rotating component 2 can accurately receive the workpiece when the nozzle presses down to release it.

[0032] Preferably, the frame is provided with a horizontal mounting plate, the drive motor and drive cylinder are mounted below the mounting plate, and the drive wheel 61 and driven wheel 62 are mounted above the mounting plate. That is, the mounting plate provides the mounting space for the above components to be mounted on the frame, and the components that actually realize the rotation function are located on the mounting plate to facilitate the receiving of workpieces.

[0033] Furthermore, the frame includes a fixed block 81 and a movable frame 82. The fixed block 81 is fixed to the pick-and-place machine, and the fixed block 81 and the movable frame 82 are slidably connected. The fixed block 81 can be fixedly connected to the pick-and-place machine by welding or threaded connection. The movable frame 82 is slidably connected to the fixed block 81, so the movable frame 82 can slide along the length direction of the fixed block 81, thereby adjusting the relative position of the rotating part 2 and the workpiece movement trajectory to ensure that the rotating part 2 can accurately receive the workpiece.

[0034] Furthermore, a threaded connector 83 is rotatably connected to one end of the fixed block 81, and the end of the threaded connector 83 is threadedly connected to the movable frame 82. These components together constitute a nut-screw mechanism. The operator can rotate the end of the threaded connector 83 to adjust the relative position of the movable frame 82 and the fixed block. Rotation stops when the movable frame 82 drives the rotating component 2 to move directly below the workpiece's trajectory. A rotating head can also be provided at the end of the threaded connector 83 away from the movable frame 82. The rotating head has anti-slip textures on its peripheral wall, allowing the operator to efficiently and quickly adjust the position of the movable frame 82 by turning the rotating head.

[0035] Furthermore, the movable frame 82 also includes a fixing member. The movable frame 82 has an adjustment hole 821 extending along the length of the threaded connector 83. The first fixing member can be fixed to the pick-and-place machine and connected to different positions of the adjustment hole 821. The fixing member is a threaded member, and the pick-and-place machine has a threaded hole. After the threaded member is screwed into the threaded hole, its end can abut against the upper surface of the adjustment hole 821, thereby fixing the movable frame 82 to the pick-and-place machine. When it is necessary to adjust the position of the movable frame 82, simply unscrew the threaded member, then turn the rotary head to move the movable frame 82. After the position of the movable frame 82 is driven, the threaded member can be reinstalled to move the movable frame 82 and then fixed.

[0036] Specifically, the rotating assembly, the detection assembly 3, and the lifting assembly are each provided in at least two sets. That is, the polar rotation mechanism provided in this embodiment has at least two stations for rotating workpieces. When the pick-and-place machine is working, the cam needs to rotate to carry the nozzle and thus move the workpiece from the outlet to the circuit board. However, if the cam rotates too fast, the workpiece will easily be thrown out of the nozzle due to centrifugal motion. Therefore, the working efficiency of the pick-and-place machine is limited by the rotation speed of the cam. By setting multiple stations for processing workpieces, the working efficiency of the polar rotation mechanism can be multiplied. The polar rotation mechanism with multiple sets of rotating assemblies, detection assemblies 3, and lifting assemblies can simultaneously perform polar rotation on multiple workpieces, thereby improving the overall efficiency of the pick-and-place machine. Preferably, the rotating assembly, the detection assembly 3, and the lifting assembly are each provided in two sets. The polar rotation mechanism provided in this embodiment can be used in pick-and-place machines with a dual-nozzle structure to improve the working efficiency of the pick-and-place machine. Furthermore, each station can work independently, that is, two workpieces can be rotated simultaneously or a single-sided station can be used to rotate the workpiece.

[0037] Specifically, this embodiment also provides a pick-and-place machine that uses the above-mentioned polar rotation mechanism, which can prevent the workpiece from getting stuck in the receiving slot 21 and improve the overall working efficiency of the pick-and-place machine.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A polar rotation mechanism, characterized in that, include: A rotating assembly, comprising a first driving member (1) and a rotating member (2) connected to the output end of the first driving member (1), wherein the rotating member (2) is provided with a receiving groove (21) for accommodating a workpiece. The detection component (3) includes through-beam sensors disposed on both sides of the receiving groove (21), the through-beam sensors being used to detect the workpiece located in the receiving groove (21); The lifting assembly includes a second drive member (4) and a lifting member (5) connected to the output end of the second drive member (4). The through-beam sensor is communicatively connected to the second drive member (4). The lifting member (5) is disposed below the receiving groove (21) and is used to lift the workpiece in the receiving groove (21).

2. The polarity rotation mechanism according to claim 1, characterized in that, The rotating assembly includes a driving wheel (61) and a driven wheel (62). The driving wheel (61) is located at the output end of the first driving member (1). The driven wheel (62) is connected to the driving wheel (61) in a transmission manner. The rotating member (2) is located on the upper surface of the driven wheel (62).

3. The polarity rotation mechanism according to claim 2, characterized in that, The driven wheel (62) has a clearance groove extending in the vertical direction. The clearance groove is connected to the receiving groove (21), and the lifting member (5) is slidably connected in the clearance groove.

4. The polarity rotation mechanism according to claim 3, characterized in that, A sensor is provided at the drive wheel (61) for detecting the rotation angle of the drive wheel (61).

5. The polarity rotation mechanism according to claim 1, characterized in that, The polar rotation mechanism also includes a frame for movably connecting to the pick and place machine, and the rotation component, the detection component (3) and the lifting component are all disposed on the frame.

6. The polarity rotation mechanism according to claim 5, characterized in that, The frame includes a fixed block (81) and a movable frame (82), the fixed block (81) being fixed to the pick and place machine and the fixed block (81) and the movable frame (82) being slidably connected.

7. The polarity rotation mechanism according to claim 6, characterized in that, One end of the fixed block (81) is rotatably connected to a threaded connector (83), and the end of the threaded connector (83) is threadedly connected to the movable frame (82).

8. The polarity rotation mechanism according to claim 7, characterized in that, The movable frame (82) also includes a fixing member. The movable frame (82) has an adjustment hole (821) extending along the length direction of the threaded connector (83). The fixing member can be fixed to the pick-and-place machine and connected to different positions of the adjustment hole (821).

9. The polar rotation mechanism according to any one of claims 1-8, characterized in that, The rotating component, the detection component (3), and the lifting component are each provided with at least two sets.

10. A pick-and-place machine, characterized in that, The pick-and-place machine is provided with a polarity rotation mechanism as described in any one of claims 1-9.

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