Flying wing type device for grabbing lead frame

Abstract

The utility model provides a flying wing type device for grabbing a lead frame, and relates to the technical field of lead frames, the flying wing type device comprises a mounting rack, the upper end of the mounting rack is provided with a grabbing device for grabbing the lead frame, the grabbing device comprises a positioning seat fixedly connected with the mounting rack, and the positioning seat is fixedly connected with the mounting rack. The side wall of the positioning seat is rotationally connected with two positioning rotating shafts, and a plurality of flying wing clamping jaws are fixed in the length direction of the positioning rotating shafts; the driving device is used for controlling the flying wing clamping jaws to be opened and closed and comprises a telescopic device arranged between the two positioning rotating shafts. The mounting structure is compact, and the occupied space is small; and the lead frame grabbing precision and stability are greatly improved, meanwhile, the service life is greatly prolonged, the structural reliability is greatly improved, and production accidents are avoided.

Description

Technical Field

[0001] This utility model relates to the field of lead frame technology, and in particular to a wing-type device for gripping lead frames. Background Technology

[0002] The lead frame is the substrate for making semiconductor materials. During the packaging process, the lead frame needs to be gripped and transported by grippers.

[0003] Traditional lead frame grippers are mostly parallel or rotary grippers, which can grasp the lead frame by controlling the opening and closing of the grippers. However, the traditional gripper control method relies on the combined action of springs and pneumatic rods for opening and closing, which limits the control accuracy and gripping effect. At the same time, the gripping life is limited by the spring material and the environment in which it is used. Spring failure can lead to production accidents. In addition, the traditional control structure and gripper structure are installed in different positions, which makes disassembly, maintenance and repair cumbersome and unreliable.

[0004] The relevant patent can be found in: CN 219457575 U. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a wing-type device for gripping lead frames. This utility model has a compact installation structure and occupies little space; it also greatly improves the accuracy and stability of gripping lead frames, while significantly increasing service life and structural reliability, thus preventing production accidents.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0007] A wing-type device for gripping a lead frame includes a mounting frame. A gripping device for gripping the lead frame is provided at the upper end of the mounting frame. The gripping device includes a positioning seat fixedly connected to the mounting frame. Two positioning shafts are rotatably connected to the side wall of the positioning seat. A plurality of wing-type grippers are fixed along the length of the positioning shafts. The device also includes a drive mechanism for controlling the opening and closing of the wing-type grippers. The drive mechanism includes a telescopic device disposed between the two positioning shafts. Two drive rods are connected to the telescopic ends of the telescopic device. The two drive rods are connected to the positioning shafts on the side away from the telescopic device.

[0008] Preferably, the drive rod and the positioning shaft are fixedly connected by a mounting base.

[0009] Preferably, the telescopic end of the telescopic device is fixed with a drive shaft, which passes through and is connected to the two drive rods.

[0010] Preferably, the flying wing gripper includes a gripper body and a clamping seat, and the clamping seat is detachably connected to the positioning shaft.

[0011] Preferably, the mounting frame has multiple gripping openings on its surface that are adapted to the wing grippers, and the gripping openings extend vertically through the frame.

[0012] Preferably, the mounting bracket has a positioning opening on its surface that is adapted to the positioning seat, and the positioning opening is located outside the gripping opening.

[0013] The beneficial effects of this utility model are as follows:

[0014] Compared with the prior art, the drive device of this utility model is installed on the surface of the mounting bracket between the two positioning shafts, which can make full use of the space to achieve deflection control of the positioning shafts on both sides. It is simple to install and maintain. In particular, the opening and closing control of the flying wing gripper is achieved by controlling the wing gripper with a single drive device, which replaces the traditional spring structure. Its application range is wider and the control accuracy and gripping effect are greatly improved. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This utility model Figure 1 A top-view structural diagram.

[0017] Figure 3 This utility model Figure 1 A side view structural diagram.

[0018] Figure 4 This is a three-dimensional structural diagram of the gripping device and driving device of this utility model.

[0019] Figure 5 This utility model Figure 4 A schematic diagram of the main structure.

[0020] In the diagram: 100, mounting bracket; 110, positioning opening; 120, gripping opening; 200, gripping device; 210, positioning seat; 220, positioning pivot; 230, wing gripper; 231, clamping seat; 232, gripper body; 300, drive device; 310, telescopic device; 320, drive pivot; 330, drive rod; 331, mounting seat. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] To address the problems existing in the background art, see Appendix Figure 1 -Appendix Figure 5A wing-type device for gripping lead frame includes a mounting frame 100, and a gripping device 200 for gripping lead frame is provided at the upper end of the mounting frame 100. The gripping device 200 grips the lead frame strip to a predetermined position for preheating and sealing.

[0023] Specifically, the gripping device 200 includes a positioning seat 210 fixedly connected to the mounting frame 100. Two positioning shafts 220 are rotatably connected to the side wall of the positioning seat 210. Several wing grippers 230 are fixed along the length of the positioning shafts 220. During the process of controlling the deflection of the positioning shafts 220, the wing grippers 230 on the surface of the positioning shafts 220 can be driven to deflect synchronously. The wing grippers 230 can deflect around the axis of the positioning shafts 220. The wing grippers 230 on both sides deflect synchronously inward to grasp the lead frame strip, and the wing grippers 230 on both sides deflect synchronously outward to release the lead frame strip.

[0024] It also includes a drive device 300 for controlling the opening and closing of the wing gripper 230. The drive device 300 includes a telescopic device 310 disposed between two positioning shafts 220. The telescopic end of the telescopic device 310 is connected to two drive rods 330. The side of the two drive rods 330 away from the telescopic device 310 is connected to the positioning shaft 220. During the telescopic process, the telescopic device 310 can drive the first end of the drive rod 330 to deflect and move. The second end of the drive rod 330 is connected to the positioning shaft 220. By controlling the deflection of the drive rod 330, the outer positioning shaft 220 can drive the wing gripper 230 to deflect synchronously, thereby realizing the opening and closing control.

[0025] The telescopic device 310 here can be selected as a pneumatic rod, hydraulic telescopic rod, or other telescopic structure.

[0026] It should be noted that the positioning shaft 220 and the drive rod 330 can be fixedly connected. When the drive rod 330 is pushed to deflect by the telescopic device 310, the lever effect can be used to drive the positioning shaft 220 and the flying wing gripper 230 to deflect, thereby realizing the opening and closing control of the flying wing gripper 230.

[0027] Meanwhile, the drive unit 300 is installed on the surface of the mounting bracket 100 between the two positioning shafts 220, which can make full use of the space to control the deflection of the positioning shafts 220 on both sides, making installation and maintenance simple; in particular, the opening and closing control of the flying wing gripper 230 by controlling it with a single drive unit 300 replaces the traditional spring structure, which has a wider range of applications and greatly improves the control accuracy and gripping effect.

[0028] The drive rod 330 and the positioning shaft 220 are fixedly connected by the mounting base 331. The side wall of the mounting base 331 has a notch, and the mounting base 331 and the positioning shaft 220 are detachably connected. The drive rod 330 and the mounting base 331 can be integrally formed to ensure the strength of the structure.

[0029] A drive shaft 320 is fixed at the telescopic end of the telescopic device 310. The drive shaft 320 passes through and connects to the two drive rods 330. The drive shaft 320 is arranged horizontally. A strip-shaped opening is opened at the end of the drive rod 330. The drive shaft 320 passes through the strip-shaped opening of the drive rod 330.

[0030] During the downward movement of the drive shaft 320 controlled by the telescopic device 310, the first side of the strip-shaped opening is squeezed. The outer side of the drive rod 330 is fixed to the positioning shaft 220 through the mounting base 331. Here, the drive rod 330 can move in an arc around the positioning shaft 220 under the limit, thereby realizing the drive control of the positioning shaft 220. During the upward movement of the drive shaft 320 controlled by the telescopic device 310, the second side of the strip-shaped opening is squeezed. The above actions are reversed, and the same effect can be achieved.

[0031] The flying wing gripper 230 here includes a gripper body 232 and a clamping seat 231. The clamping seat 231 is detachably connected to the positioning shaft 220. The gripper body 232 has an L-shaped hook structure in cross-section, which can grasp the lead frame during the deflection and opening process. The clamping seat 231 is detachably fixedly connected to the positioning shaft 220, which facilitates the replacement, adjustment and maintenance of the flying wing gripper 230.

[0032] The mounting bracket 100 has multiple gripping openings 120 that are adapted to the flying wing grippers 230. The gripping openings 120 extend vertically. After installation and positioning, the flying wing grippers 230 can pass through the gripping openings 120, and the end of the flying wing grippers 230 extends to the outside of the gripping openings 120. The above installation method can further reduce the overall size and meet the installation and use of more models.

[0033] The mounting bracket 100 has a positioning opening 110 that matches the positioning seat 210. The positioning opening 110 is located outside the gripping opening 120. There are two positioning openings 110, one on the outside of the gripping opening 120. The positioning opening 110 can be used to position the positioning seat 210, ensuring installation accuracy and effectiveness. This ensures the accuracy of subsequent gripping of the lead frame.

[0034] This application can solve at least the following problems:

[0035] 1. Spring fatigue and lifespan issues.

[0036] Poor reliability of springs over long-term use: Springs gradually fatigue during repeated compression / tension, leading to a decrease in elastic modulus and eventual failure (inability to provide sufficient restoring force); High maintenance costs: Springs need to be inspected or replaced regularly, especially under high-frequency or high-load conditions, increasing the maintenance frequency; Risk of sudden failure: Spring breakage or jamming may cause the gripper to fail to return to its original position, affecting equipment safety (e.g., production line shutdown or workpiece falling off), and causing significant damage to the mold.

[0037] 2. The problem of non-adjustable reset force.

[0038] Spring fixed reset characteristics: The stiffness (k value) and preload of the spring are determined during the design and the reset force cannot be dynamically adjusted according to the working conditions; if the weight or friction of the clamped object changes, it may lead to incomplete reset or delayed response; poor adaptability: special springs need to be designed for different loads, making it difficult to be compatible with multi-task scenarios.

[0039] 3. Limited response speed.

[0040] Reliance on mechanical inertia: The speed of spring reset is limited by spring stiffness, mass and the inertia of the gripper moving parts, which may not meet the real-time requirements in high-frequency or high-speed scenarios (such as high-speed reset); Reset delay: The reset process may be accompanied by vibration or jitter, affecting positioning accuracy.

[0041] 4. Accuracy issues.

[0042] Poor spring reset repeatability: Creep or slight deformation of the spring may cause deviation in the reset position, making it unsuitable for high-precision assembly scenarios (such as precision part gripping); Nonlinear characteristics: The force-displacement curve of some springs (such as nonlinear disc springs) is not smooth, which increases the difficulty of control.

[0043] 5. Environmental sensitivity issues.

[0044] Temperature effects: The elastic modulus of spring materials (such as ordinary steel) changes with temperature. High temperatures may soften the spring, while low temperatures may make it brittle, resulting in unstable restoring force. Contamination risk: Springs exposed to dust, oil, or corrosive environments are prone to jamming or corrosion, requiring additional protection (such as installing a sealing cover).

[0045] 6. Limited installation space.

[0046] The original gripper's cylinder was fixed to other components, making the structure very compact and inconvenient for maintenance. The gripper was controlled by a central connecting block, resulting in a very long stroke, and the control was not located at the center of the gripper. It was easy for it to deviate to one side, and there were parts all around, making it difficult to troubleshoot and repair problems. It was also not easy to clean dust.

[0047] The technical solution of this application can effectively solve the above problems. Its installation structure is compact and occupies little space. It also greatly improves the accuracy and stability of the lead frame gripping, while greatly improving the service life and structural reliability, and avoiding the occurrence of production accidents.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wing-type device for gripping a lead frame, comprising a mounting frame (100), wherein a gripping device (200) for gripping the lead frame is provided at the upper end of the mounting frame (100), characterized in that: The gripping device (200) includes a positioning seat (210) fixedly connected to the mounting frame (100). Two positioning shafts (220) are rotatably connected to the side wall of the positioning seat (210), and a plurality of flying wing grippers (230) are fixed along the length of the positioning shafts (220). It also includes a drive device (300) for controlling the opening and closing of the wing gripper (230). The drive device (300) includes a telescopic device (310) disposed between two positioning shafts (220). The telescopic end of the telescopic device (310) is connected to two drive rods (330). The two drive rods (330) are connected to the positioning shafts (220) on the side away from the telescopic device (310).

2. The wing-type device for gripping a lead frame according to claim 1, characterized in that, The drive rod (330) and the positioning shaft (220) are fixedly connected by a mounting base (331).

3. The wing-type device for gripping a lead frame according to claim 1, characterized in that, The telescopic device (310) has a drive shaft (320) fixed at its telescopic end. The drive shaft (320) passes through and is connected to the two drive rods (330).

4. The wing-type device for gripping a lead frame according to claim 1, characterized in that, The flying wing gripper (230) includes a gripper body (232) and a clamping seat (231), and the clamping seat (231) is detachably connected to the positioning pivot (220).

5. The wing-type device for gripping a lead frame according to claim 1, characterized in that, The mounting bracket (100) has multiple gripping openings (120) on its surface that are adapted to the flying wing gripper (230), and the gripping openings (120) extend through the top and bottom.

6. The wing-type device for gripping a lead frame according to claim 5, characterized in that, The mounting bracket (100) has a positioning opening (110) on its surface that is compatible with the positioning seat (210), and the positioning opening (110) is located outside the gripping opening (120).

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